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					SPOKANE COUNTY
  Regional Wastewater
      Treatment Plant
             FINAL SUPPLEMENTAL
  ENVIRONMENTAL IMPACT STATEMENT




                     December 2002

        Spokane County Public Works
          1026 West Broadway Avenue
                 Spokane, WA 99260
                                       MEMORANDUM

To:              Recipients of the Final Supplemental Environmental Impact Statement for
                 the Spokane County Regional Wastewater Treatment Plant
From:            N. Bruce Rawls/Spokane County Utilities Director
Date:            December 6, 2002
Re:              Issuance of Final Supplemental EIS

The attached document is the Final Supplemental Environmental Impact Statement (EIS)
for the Spokane County Regional Wastewater Treatment Plant. The EIS identifies
potential impacts of constructing and operating a wastewater treatment plant at two
alternative sites. It supplements analysis conducted in a programmatic EIS, the final of
which was issued in February 2002. That programmatic EIS evaluated options to
increase capacity as described in the County’s Wastewater Facilities Plan and assisted the
County in their decision to construct a new wastewater treatment plant. Construction of a
new treatment plant will enable the County to continue its septic tank elimination
program to improve regional water quality and accommodate projected growth.

The County is scheduled to make its final decision on a site before the end of the year
under the assumption that Spokane County will continue to provide wastewater
management services to the new City of Spokane Valley. The new city will not be in a
position to make a decision until at least March of 2003, but the County still has
responsibility to ensure there is adequate capacity to meet regional wastewater demands
in 2007. Should the City of Spokane Valley choose not to have the County continue to
provide wastewater management services, the recommended approach may change
substantially at that time.

The Supplemental EIS assesses the impacts of two alternatives for the County to address
its long-term wastewater facility needs. The County has identified Alternative 1 –
Stockyards Site, as the Preferred Alternative. Alternative 1 is located within the City of
Spokane just west of the City’s east boundary. Alternative 2 – Alki/Fancher Site -- is
located within the newly incorporated City of Spokane Valley. The Supplemental EIS
also evaluated two alternatives for outfall discharge. The preferred alternative would
discharge to the Spokane River near Rebecca Street. The second alternative would
discharge slightly downstream near Springfield Avenue.

Both treatment plant sites and associated conveyance facilities have similar
environmental impacts. The major impacts of the project are associated with
construction activities, which are temporary but unavoidable. Residents and businesses
near the construction areas will be affected. Once operational, odor and noise from the

  1026 W. Broadway Ave. · Spokane, Wa 99260-0430 · (509) 477-3604 Fax: (509) 477-4715 TDD: (509) 477-7133
treatment plant system will be negligible. The effluent discharged to the Spokane River
will meet water quality standards and will not impact water quality in the Spokane River.
Minimal to no impacts are expected to the Spokane Valley-Rathdrum Prairie Aquifer.
The new facility will also enable continuation of the Septic Tank Elimination Program,
which will improve the region’s groundwater quality. The Stockyards Alternative, the
County’s preferred alternative, has the added benefit of re-developing vacant industrial
property within the City of Spokane. In addition to constructing a new treatment plant,
the County would continue to rely on the City of Spokane’s Advanced Wastewater
Treatment Plant (SAWTP) for treatment of a portion of the County’s wastewater.

A Draft Supplemental EIS was published October 8, 2002, and the public comment
period closed on November 7, 2002. A public meeting on the Draft Supplemental EIS
was held on October 24, 2002. Thirty-six people attended the public meeting. The public
presentation summarized the facility siting process and the findings of the EIS.
Questions posed at the meeting were primarily concerned with specifics of plant
operation and the political implications of locating the plant in the city limits of Spokane.

The Final Supplemental EIS reprints the Draft Supplemental EIS with changes
incorporated. Any changes made to the draft document are shown in underline and
strikeover format in the final document. The comments received on the Draft
Supplemental EIS and the County's responses to each of those comments are located in
Chapter 4 of the Final Supplemental EIS. Appendix B has been added to the Final
Supplemental EIS and contains documentation of agency and tribal contacts made to
fulfill the requirements of the State Environmental Review Process (SERP).

The County thanks you for your interest in this important project, and encourages you to
continue to participate as we move toward implementation of the selected alternative.
The Board of County Commissioners will conduct a public hearing on Tuesday,
December 17, 2002, to consider selection of a site and conveyance system for the
Spokane Regional Wastewater Treatment Plant.
                                                         Spokane County WWTP Final Supplemental EIS



                                        FACT SHEET
PROJECT TITLE
Spokane County Regional Wastewater Treatment Plant.

PROJECT DESCRIPTION
Spokane County proposes to construct a new wastewater treatment plant. The new plant and
associated facilities will provide additional capacity for projected growth in the County and for
increased wastewater flows generated by the County's Septic Tank Elimination Program. This
proposal is based on the assumption that Spokane County will continue to provide wastewater
management services to the new City of Spokane Valley. If the new city chooses not to have
Spokane County provide wastewater management services, then the proposal may change
substantially.

The new treatment plant will provide wastewater treatment for the County's Spokane Valley and
North Valley Spokane Planning Areas. Under an agreement with the City of Spokane, the
County has 10 million gallons per day (mgd) of capacity at the City of Spokane's Advanced
Wastewater Treatment Plant (SAWTP). The County proposes to construct a new treatment plant
to provide an initial 8 mgd of capacity for the region by 2007 with an ability to expand capacity
in phases up to 24 mgd with ultimate buildout.

This document, the Spokane County Regional Wastewater Treatment Plant Draft Supplemental
Environmental Impact Statement (EIS) identifies potential environmental impacts of the
proposed new treatment plant. The analysis is conducted on two alternative sites being
considered by the County, and compared with a No Action Alternative:

•   Alternative 1 – Stockyards Site
•   Alternative 2 - Alki/Fancher Site
•   Alternative 3 – No Action

Based on preliminary evaluations, the County identified the Stockyards Site as their Preferred
Alternative.

ACTION SPONSOR AND LEAD AGENCY
Public Works Department
Spokane County
Mailstop PWK-4
1116 West Broadway Avenue
Spokane, WA 99260-0430




December 2002                                                                             Page FS-1
Spokane County WWTP Final Supplemental EIS


CONTACT PERSON
Bruce Rawls, Utilities Director
(509) 477-3604

PERMITS, LICENSES, AND APPROVALS REQUIRED OR
POTENTIALLY REQUIRED
City of Spokane                                Spokane County
• Land Use—Special Use Permit                  • Land Use
• Clearing and Grading                         • Clearing and Grading
• Building                                     • Building
• Street Use                                   • Street Use
• Shoreline Substantial Development Permit     • Shoreline Substantial Development Permit
                                               • Notice of Construction Approval (Spokane
                                                  County Air Pollution control Agency)
State of Washington                         Federal
• State Environmental Review Process        • Section 404—Nationwide Permit 7
    (Ecology)
• National Pollution Discharge Elimination
    System (Ecology)
• 401 Water Quality Certification (Ecology)
• Hydraulic Project Approval (Department of
    Fish and Wildlife)
• General Permit for Biosolids Management
    (Ecology)

AUTHORS AND CONTRIBUTORS
This Draft Supplemental EIS has been prepared under the direction of the Spokane County
Public Works Department, Utilities Division. Research and analysis were provided by:

Adolfson Associates, Inc.                      Eastern Washington University
5309 Shilshole Avenue NW, Suite 200            Archaeological and Historical Services
Seattle, WA 98107                              201 Isle Hall
206-789-9658                                   Cheney, WA 99004-2420

HDR Engineering, Inc.                          Hubbard-Gray Consulting, Inc.
500 108th Avenue NE, Suite 1200                6604 W. Iroquois Drive
Bellevue, WA 98004-5538                        Spokane, WA 99208

URS Corporation
1101 Argonne, Suite 201
Spokane, WA 99212



Page FS-ii                                                                      December 2002
                                                         Spokane County WWTP Final Supplemental EIS



DATE OF ISSUE OF DRAFT SUPPLEMENTAL EIS
October 8, 2002

PUBLIC MEETING ON DRAFT SUPPLEMENTAL EIS
A public meeting on the Draft Supplemental EIS was held on October 24, 2002 at West Valley
High School in Spokane. Thirty-six people attended the meeting. A public presentation
summarized the facility siting process and the findings of the EIS. Questions posed at the public
meeting focused on specifics of the treatment operation and the political implications of locating
the plant in the city limits of Spokane.

END OF DRAFT SUPPLEMENTAL EIS COMMENT PERIOD
November 7, 2002

DATE OF ISSUE OF FINAL SUPPLEMENTAL EIS
December 6, 2002

ORGANIZATION OF THE FINAL SUPPLEMENTAL EIS
The Final Supplemental EIS reprints the Draft Supplemental EIS with changes incorporated.
Any changes made to the draft document are shown in underline and strikeover format. The
changes to the text are minor and augment existing information. There have been no changes to
the alternatives or assumptions used in the Draft Supplemental EIS. A new Table 1-1, Impact
and Mitigation Summary, has been inserted in the Final Supplemental EIS. Changes to it can be
identified by comparing it with Table 1-1 in the draft document.

The comments received on the Draft Supplemental EIS and the County's responses to each of
those comments are located in Chapter 4 of the Final Supplemental EIS. Appendix B has been
added to the Final Supplemental EIS and contains documentation of agency and tribal contacts
made to fulfill the requirements of the State Environmental Review Process (SERP).

ADDITIONAL ENVIRONMENTAL REVIEW
This Draft Final Supplemental EIS builds on the environmental analysis provided in the
Programmatic EIS prepared for the Spokane County Wastewater Facilities Plan (Final EIS dated
February 2002). In the programmaticearlier document, analysis was conducted on several
system options available to the County. The County utilized that information to make its
decision to move forward with the construction of a new regional wastewater treatment plant.

This Supplemental EIS will serve as the environmental documentation for subsequent
construction-related permits, provided the scope of the project described here does not
substantially change. If substantive changes to the proposal are made, additional environmental
review will be conducted. Additionally, the County will be seeking funding assistance from the

December 2002                                                                            Page FS-iii
Spokane County WWTP Final Supplemental EIS


State Revolving Fund and will meet requirements under the State Environmental Review
Process.

DISTRIBUTION
Copies of this document have been sent to the agencies, individuals and libraries listed in
Chapter 56.

DOCUMENT AVAILABILITY
Copies of this document are available for review at the Spokane County Public Libraries and at
the website listed below. Copies of this document are also available for review or purchase at
the Spokane County Public Works Office, Utilities Division, located at 1026 West Broadway
Avenue. Purchase price in CD format is $5.00; in printed format $15.00.

WEBSITE ACCESS
This document may be viewed on the Spokane County Utilities Division website,
www.spokanecounty.org/utilities. Click on the icon for Supplemental EIS, listed under
Wastewater Facilities Plan.




Page FS-iv                                                                           December 2002
                                                                                                      Spokane County WWTP Final Supplemental EIS



                                                   TABLE OF CONTENTS
FACT SHEET.........................................................................................................................................................FS-i

CHAPTER 1.                PURPOSE AND NEED FOR THE PROJECT ....................................................................... 1-1
    INTRODUCTION ...................................................................................................................................................... 1-1
    NEED FOR THE PROJECT......................................................................................................................................... 1-1
       Background ...................................................................................................................................................... 1-1
       Purpose of the Project...................................................................................................................................... 1-7
    SUMMARY OF IMPACTS .......................................................................................................................................... 1-7
CHAPTER 2.                DESCRIPTION OF ALTERNATIVES .................................................................................... 2-1
    INTRODUCTION ................................................................................................................................................ 2-1
    SPOKANE COUNTY WASTEWATER TREATMENT PLANT PROGRAM ........................................................................ 2-1
      Basic Site Layout.............................................................................................................................................. 2-1
      Operation ......................................................................................................................................................... 2-1
      Staffing ............................................................................................................................................................. 2-3
      Construction..................................................................................................................................................... 2-3
    SUMMARY OF COST-EFFECTIVENESS ANALYSIS ................................................................................................... 2-4
    DESCRIPTION OF ALTERNATIVES ........................................................................................................................... 2-6
      Stockyards Alternative ..................................................................................................................................... 2-9
      Alki/Fancher Alternative................................................................................................................................ 2-10
      Outfall Options............................................................................................................................................... 2-15
      Biosolids Management................................................................................................................................... 2-15
      No Action Alternative..................................................................................................................................... 2-16
    ALTERNATIVES CONSIDERED BUT NOT SELECTED .............................................................................................. 2-16
CHAPTER 3.                IMPACTS OF ALTERNATIVES AND MITIGATION ........................................................ 3-1

AIR QUALITY ........................................................................................................................................................ 3-1
    AFFECTED ENVIRONMENT ..................................................................................................................................... 3-1
      Stockyards Alternative ..................................................................................................................................... 3-2
      Alki/Fancher Alternative.................................................................................................................................. 3-3
      Rebecca Street Outfall ..................................................................................................................................... 3-4
      Springfield Avenue Outfall............................................................................................................................... 3-5
    IMPACTS ................................................................................................................................................................ 3-5
      Construction..................................................................................................................................................... 3-5
      Operation ......................................................................................................................................................... 3-8
    MITIGATION MEASURES ...................................................................................................................................... 3-11
      Construction................................................................................................................................................... 3-11
      Operation ....................................................................................................................................................... 3-11
SURFACE WATER .............................................................................................................................................. 3-12
    AFFECTED ENVIRONMENT ................................................................................................................................... 3-12
      Major Surface Water Bodies.......................................................................................................................... 3-12
      Water Quality................................................................................................................................................. 3-15
    IMPACTS .............................................................................................................................................................. 3-17
      Construction................................................................................................................................................... 3-17
      Operation ....................................................................................................................................................... 3-18
    MITIGATION MEASURES ...................................................................................................................................... 3-20
      Construction................................................................................................................................................... 3-20
      Operation ....................................................................................................................................................... 3-20




December 2002                                                                                                                                                         Page i
Spokane County WWTP Final Supplemental EIS


                                       TABLE OF CONTENTS (Cont.)
GROUNDWATER ................................................................................................................................................ 3-21
    AFFECTED ENVIRONMENT ................................................................................................................................... 3-21
      Water Quality................................................................................................................................................. 3-22
    IMPACTS .............................................................................................................................................................. 3-25
      Construction................................................................................................................................................... 3-25
      No Action Alternative..................................................................................................................................... 3-25
      Operation ....................................................................................................................................................... 3-25
    MITIGATION MEASURES ...................................................................................................................................... 3-27
      Construction................................................................................................................................................... 3-27
      Operation ....................................................................................................................................................... 3-27
ENVIRONMENTAL HEALTH........................................................................................................................... 3-29
    AFFECTED ENVIRONMENT ................................................................................................................................... 3-29
      Noise Overview .............................................................................................................................................. 3-29
      Relevant Local, State, and Federal Noise Standards and Guidelines............................................................ 3-29
      Hazardous Materials Overview ..................................................................................................................... 3-31
      Stockyards Alternative ................................................................................................................................... 3-32
      Alki/Fancher Alternative................................................................................................................................ 3-33
      Outfall Options............................................................................................................................................... 3-34
    IMPACTS .............................................................................................................................................................. 3-34
      Construction................................................................................................................................................... 3-34
      Operation ....................................................................................................................................................... 3-36
    MITIGATION MEASURES ...................................................................................................................................... 3-37
      Construction................................................................................................................................................... 3-37
      Operation ....................................................................................................................................................... 3-38
PLANTS AND ANIMALS .................................................................................................................................... 3-39
    AFFECTED ENVIRONMENT ................................................................................................................................... 3-39
      Stockyards Alternative ................................................................................................................................... 3-39
      Alki/Fancher Alternative................................................................................................................................ 3-40
      Rebecca Street Outfall ................................................................................................................................... 3-41
      Springfield Avenue Outfall............................................................................................................................. 3-41
      Biosolids......................................................................................................................................................... 3-42
    IMPACTS .............................................................................................................................................................. 3-42
      Stockyards Alternative ................................................................................................................................... 3-42
      Alki/Fancher Alternative................................................................................................................................ 3-42
      Rebecca Street Outfall ................................................................................................................................... 3-43
      Springfield Avenue Outfall............................................................................................................................. 3-43
      Biosolids......................................................................................................................................................... 3-44
    MITIGATION MEASURES ....................................................................................................................................... 3-44
LAND USE AND SHORELINES......................................................................................................................... 3-45
    AFFECTED ENVIRONMENT ................................................................................................................................... 3-45
      Stockyards Alternative ................................................................................................................................... 3-47
      Alki/Fancher Alternative................................................................................................................................ 3-48
      Rebecca Street Outfall ................................................................................................................................... 3-49
      Springfield Avenue Outfall............................................................................................................................. 3-49
      Biosolids......................................................................................................................................................... 3-49
    IMPACTS .............................................................................................................................................................. 3-49
      Construction................................................................................................................................................... 3-49
      Operation ....................................................................................................................................................... 3-51
    MITIGATION MEASURES ...................................................................................................................................... 3-53



Page ii                                                                                                                                                December 2002
                                                                                                      Spokane County WWTP Final Supplemental EIS


                                       TABLE OF CONTENTS (Cont.)
RECREATION ...................................................................................................................................................... 3-54
    AFFECTED ENVIRONMENT ................................................................................................................................... 3-54
      Stockyards Alternative ................................................................................................................................... 3-54
      Alki/Fancher Alternative................................................................................................................................ 3-57
      Outfall Options............................................................................................................................................... 3-58
    IMPACTS .............................................................................................................................................................. 3-58
      Construction................................................................................................................................................... 3-58
      Operation ....................................................................................................................................................... 3-60
    MITIGATION ........................................................................................................................................................ 3-61
      Construction................................................................................................................................................... 3-61
      Operation ....................................................................................................................................................... 3-61
AESTHETICS........................................................................................................................................................ 3-62
    AFFECTED ENVIRONMENT ................................................................................................................................... 3-62
      Stockyards Alternative ................................................................................................................................... 3-62
      Alki/Fancher Alternative................................................................................................................................ 3-62
      Outfall Options............................................................................................................................................... 3-65
    IMPACTS .............................................................................................................................................................. 3-65
      Construction................................................................................................................................................... 3-65
      Operation ....................................................................................................................................................... 3-66
    MITIGATION MEASURES ...................................................................................................................................... 3-67
      Construction................................................................................................................................................... 3-67
      Operation ....................................................................................................................................................... 3-67
CULTURAL RESOURCES ................................................................................................................................. 3-73
    AFFECTED ENVIRONMENT ................................................................................................................................... 3-73
      Stockyards Alternative ................................................................................................................................... 3-73
      Alki/Fancher Alternative................................................................................................................................ 3-73
      Rebecca Street Outfall ................................................................................................................................... 3-74
      Springfield Avenue Outfall............................................................................................................................. 3-74
    IMPACTS .............................................................................................................................................................. 3-75
      Construction................................................................................................................................................... 3-75
      Operation ....................................................................................................................................................... 3-75
    MITIGATION MEASURES ...................................................................................................................................... 3-76
TRANSPORTATION ........................................................................................................................................... 3-77
    AFFECTED ENVIRONMENT ................................................................................................................................... 3-77
      Relevant Local, State, and County Transportation Standards and Guidelines .............................................. 3-77
      Potentially-affected Streets ............................................................................................................................ 3-77
      Stockyards Alternative ................................................................................................................................... 3-81
      Alki/Fancher Alternative................................................................................................................................ 3-82
      Rebecca Street Outfall ................................................................................................................................... 3-83
      Springfield Avenue Outfall............................................................................................................................. 3-83
    IMPACTS .............................................................................................................................................................. 3-84
      Construction................................................................................................................................................... 3-84
      Operation ....................................................................................................................................................... 3-86
    MITIGATION MEASURES ...................................................................................................................................... 3-88
      Construction................................................................................................................................................... 3-88
      Operation ....................................................................................................................................................... 3-88
CHAPTER 4.                COMMENTS AND RESPONSES............................................................................................. 4-1

CHAPTER 5.                REFERENCES............................................................................................................................ 5-1



December 2002                                                                                                                                                      Page iii
Spokane County WWTP Final Supplemental EIS


                                     TABLE OF CONTENTS (Cont.)
CHAPTER 6.               DISTRIBUTION LIST ............................................................................................................... 6-1

APPENDIX A – AGENCY CORRESPONDENCE............................................................................................. A-1

APPENDIX B – SERP TRIBAL AND AGENCY DOCUMENTATION ...........................................................B-1


List of Tables

Table 1-1 Impact and Mitigation Summary............................................................................................................... 1-8
Table 3-1. Anticipated Effluent Quality Requirements for New Surface Water Discharges for the
               Spokane River................................................................................................................................. 3-16
Table 3-2. Projected Performance of Proposed Treatment Technology (Summer Permit Season) ....................... 3-17
Table 3-3. Sound Levels Produced by Common Noise Sources ............................................................................ 3-30
Table 3-4. Maximum Permissible Environmental Noise Levels ............................................................................ 3-31
Table 3-5. Estimated Numbers of Vehicle and Truck Trips .................................................................................... 3-87


List of Figures

Figure 1-1. Vicinity Map .......................................................................................................................................... 1-3
Figure 1-2. North Spokane Planning Area................................................................................................................ 1-4
Figure 1-3. Spokane Valley Planning Area .............................................................................................................. 1-5
Figure 2-1. Site Location Map.................................................................................................................................. 2-7
Figure 2-2. Stockyards Alternative........................................................................................................................... 2-8
Figure 2-3. Stockyards Conveyance Routes ........................................................................................................... 2-11
Figure 2-4. Alki/Fancher Alternative...................................................................................................................... 2-12
Figure 2-5. Alki Fancher Conveyance Routes........................................................................................................ 2-13
Figure 3-1. Spokane Area Water Resources ............................................................................................................ 3-13
Figure 3-2. Spokane Area Aquifers ........................................................................................................................ 3-14
Figure 3-3. Gaining and Losing River Stretches .................................................................................................... 3-23
Figure 3-4. Wellhead Protection Zones .................................................................................................................. 3-24
Figure 3-5. Recreational Facilities.......................................................................................................................... 3-55
Figure 3-6. Stockyards Alternative – Existing Conditions ..................................................................................... 3-63
Figure 3-7. Alki/Fancher alternative – Existing Conditions ................................................................................... 3-64
Figure 3-8. Example Wastewater Treatment Plant Layout – 12 MGD Plant ......................................................... 3-69
Figure 3-9. Example Administration and Maintenance Area Design ..................................................................... 3-70
Figure 3-10. Example Pump Station....................................................................................................................... 3-71
Figure 3-11. Transportation .................................................................................................................................... 3-79




Page iv                                                                                                                                         December 2002
                                                         Spokane County WWTP Final Supplemental EIS




                 CHAPTER 1. PURPOSE AND NEED
                      FOR THE PROJECT
INTRODUCTION
This Supplemental Environmental Impact Statement (EIS) identifies the potential environmental
impacts of a new Spokane County Regional Wastewater Treatment Plant. The proposal to
expand wastewater treatment capacity in Spokane County is driven by a number of factors:
environmental protection; constraints on expansion of the existing treatment plant; population
growth in the County; and the County's program to expand its wastewater collection system to
reduce the number of septic tanks located over the Spokane Valley – Rathdrum Prairie Aquifer
(referred to as the Spokane Aquifer in this document). This chapter summarizes the issues
considered by the County in its decision to expand treatment capacity during development of its
Wastewater Facility Plan. The County's objectives for a new treatment plant are also reviewed.
At the end of this chapter is a summary of the impacts anticipated from the proposed alternatives.

The Wastewater Facilities Plan and Supplemental EIS are prepared with the assumption that
Spokane County will continue to provide wastewater management services to the new City of
Spokane Valley. If the new city chooses not to have Spokane County provide wastewater
management, the recommended approach may change substantially.
NEED FOR THE PROJECT

Background
Spokane County is located in northeastern Washington adjacent to the Idaho border (see
Figure 1-1). The service area for the County's wastewater treatment facilities is the urbanized
area in the County immediately adjacent to the Spokane city limits to the north and east
(Figure 1-1). The majority of this area is located in the recently-incorporated City of Spokane
Valley. It includes the North Valley Spokane planning area, located along the Little Spokane
River (see Figure 1-2) and the Spokane Valley planning area, located along the Spokane River
east of the City of Spokane (see Figure 1-3). The 20-year boundaries for these planning areas are
defined by the service boundaries between the County and the City of Spokane and Liberty Lake
Sewer and Water District No. 1. The County's sewer system currently serves a population over
58,000.
Existing Wastewater Treatment System
Most of the wastewater in Spokane County is treated at the Spokane Advanced Wastewater
Treatment Plant (SAWTP), owned and operated by the City of Spokane. Spokane County
maintains five small satellite treatment facilities. These facilities are either community septic
systems or extended aeration package wastewater treatment plants. The Liberty Lake Sewer and
Water District No. 1 operates a treatment plant on the eastern end of the Spokane Valley.

The SAWTP is located in northwest Spokane on the north bank of the Spokane River. The 28-
acre site is bounded by Riverside State Park. The SAWTP serves the City of Spokane, Spokane
County, the Town of Millwood, the City of Airway Heights, and Fairchild Air Force Base. The
plant was constructed in 1958, expanded in 1962, and upgraded to provide advanced secondary

December 2002                                                                              Page 1-1
Spokane County WWTP Final Supplemental EIS


treatment and seasonal phosphorous removal in 1977. The plant has undergone several upgrades
since 1977. The rated capacity of the plant is 440 million gallons per day (mgd). Spokane
County has purchased 10 mgd of that capacity, as specified in an Interlocal Agreement between
the County and the City.
Planning Area Population Growth
The total population currently served by the Spokane County sewer system is 58,000. That
population is predicted to increase to 161,010 in 2020, triple the current population. By 2050,
the long-range planning period for the Wastewater Facilities Plan, the population is predicted to
be 218,204, four times the current population. These population figures were developed for the
Year 2000 Comprehensive Wastewater Management Plan (CWMP) for Spokane County. The
Growth Management Act mandates that urban service, including sewer service, must be
available to serve this projected growth. Projections indicate that the County will exceed its
10 mgd capacity at the SAWTP by 2007.
Water Quality and Water Resources Issues
Water quality and water resource issues in the area center around the Spokane River and the
Spokane Aquifer. The Middle Spokane River (the Spokane River from Nine Mile Bridge to the
Idaho state line) and Long Lake (the Spokane River from Long Lake Dam to Nine Mile Dam)
are classified by the Washington State Department of Ecology (Ecology) for such uses as water
supply; stock watering; fish and shellfish rearing, spawning and harvesting; wildlife habitat;
primary contact recreation; and commerce and navigation. Ecology has established water quality
standards that must be achieved to maintain these designated uses. Ecology has identified water
quality problems in the Spokane River for the following constituents: arsenic, cadmium,
chromium, dissolved oxygen, lead, PCBs, sediment bioassay, and zinc. Construction of a new
treatment facility will be required to meet water quality standards established by Ecology to
protect those characteristic uses of the water bodies and to minimize pollution problems from the
identified constituents.

The Spokane Aquifer underlies the planning area. This large aquifer is the primary source of
drinking water for the Spokane Region. Contamination of the aquifer could threaten the drinking
water supply of over 400,000 people. Groundwater contaminant concerns from septic tanks
include nitrates, phosphates, disease-causing bacteria, viruses, and other microorganisms. In a
nationwide study, the Environmental Protection Agency identified leaking septic tanks as the
major cause of outbreaks of water-borne diseases (Texas Water Resources Research Institute,
1986). Spokane County has been expanding its wastewater collection system to replace septic
tanks since the early 1980s. The goal of this program is to reduce potential contamination of the
aquifer. The program is responsible for adding over 20,000 connections to the sewer system and
anticipates an additional 20,000 connections by the time the program ends in 2015.




Page 1-2                                                                             December 2002
                                                                                                    Streams

                                                                                                    Waterbodies                                                                Deer Park
                                                                                                    Priority Sewer Service Area
                                                                                                    Major Roads
                                                                                                    Urban Growth Area
                                                                                                    Cities
                                                                                                                                                                               395




                                                                                                                                                            Stevens County
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                                                                                                                                                                                     City Of Spokane                                     90
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                                                                                   Lincoln County




                                                                                                                                                                                                                          Valley
                                                                                                                                                   Airway Heights
                                                                                                                         2
                                                                                                                                  Fairchild A.F.B.




                                                                                                                           Medical Lake



                                                                                                                                             90

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                                                                                                                                                                                                                                              Latah

                                                                                                             Map data shown are the property of the                                                                    FIGURE 1-1
                                                                                                             sources listed below. Inaccuracies may
                                                                                                             exist, and Adolfson Associates, Inc. implies                                                            VICINITY MAP
                                                                                                             no warranties or guarantees regarding any
                                                                                                             aspect of data depiction.                                       SPOKANE COUNTY REGIONAL WASTEWATER TREATMENT PLANT
                                                                                                             Source: Spokane Co. GIS, 2001                                                           SPOKANE COUNTY, WASHINGTON
                                                                                                                                                                                                                                                                                                                                       Palomino
                                                                                                                                                                                                                                                Hw




                                                                                                                                                                                                                                                                                                                                                                                       Ranchette Ranchet
                                                                                                                                              Ballard                                                                                                                                                                                                                                                                                                                                Handy




                                                                                                                                                                                                                                                                                                                                                           Michael
                                                                                                                                                                                                                                                  y3




                                                                                                                                                                                                                                                                                                                                                                                                              Saddle Hill
                                                                                                                                                                                                                                                                                                                                                               Hilltop
                                                                                                                                                                                                                                                   95
                                                                                                  Interceptors and Extensions                                                                                                                                                                                                                                                                                                                                                    Ballard




                                                                                                                                                                                                                                                                                                                                                                                                                                                                Boston
                                                                                                                                                                                                                                                            2010




                                                                                                                                                                                                                                                                                 Hatch
                                                                                                                      Built
                                                                                                                                                                                                                                                             Ballard




                                                                                                                                                                                                                                                                                                                                                                                                                                                            y
                                                                                                                                                                                                                            Ballard




                                                                                                                                                                                                                                                                                                                                                                                                                                                      Carne
                                                                                                                      Proposed




                                                                                                                                                                                                                                                                                                                                                  Ox
                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Silver Pine




                                                                                                                                                                                                                                                                                                                                                                                                         te
                                                                                                                                                                                                                                                                                                                                                     b  ow
                                                                                                                     Roads




                                                                                                                                                                                                                                                              May
                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Green Bluff
                                                                                                                     Streams




                                                                                                                                                                                                                                                                  fa
                                                                                                                                                                                                                                                                                                        Midway




                                                                                                                                                                                                                                                                   ir
                                                                                                                       Hazard                                                                                                                                                        1996
                                                                                                                     Waterbodies




                                                                                                                                                                                                                                                                                                                                                  Cir
                                                                                                         Dalton




                                                                                                                                                                                                                                                                                                                                                      ru
                                                                                                                                                                                                                                                                                                                             Golden




                                                                                                                                                                                                                                                                                                                                                         s
                                                                                                                     Priority Sewer Service Area                                                                                                                                                                                                                                                                                                                Day Mt Spokane
                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Patricia




                                                                                                                                                                                                                                                                                                                                                                                                                                                                 Yale
                                                                                                                     Urban Growth Area                                                                                             Austin                                            2004                                                                                                                                      Beverly
                                                                                                                                                                                                                                                                                                                                                                                                                              Moody




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               Chron
                                                                                                  Sewer Project Priorities




                                                                                                                                                                                                                                                                                                                                                                                                                                            Newport
                                                                                                                                                                                                                                                                                                                                                                                                                                                                       Pineglen




                                                                                                                                                                                                                                                                   Wandermere
                                                                                                                                                                                                                                                                                                                                                                                                                              Zeus
                                                                                                                                                                                                                                                                                                                                                                                                                                                                       Lane Park




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     icle
                                                                                                                     Sewered Projects (1995-1999)                                                                                                                                                                                                                     Lane Park




                                                                                                                                                                                                                                                                                                                                                                                                                                               Black




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      we
                                                                                                                                                                                                                                                                                                                                                                                                                                                                Cuba
                                                                                                                     6 Yr. Program (2000-2005




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     Lo
                                                                                                                                                                                                                                                                                                                                                                                                                                                                   Yale
                                                                                                                     15 Yr. Program (2006-2010)                                                             Schafer
                                                                                                                                                                              Ste
                                                                                                                                                                                  a   r ns                                                                                                   2013
                                                                                                                                                                                                        Hazard




                                                                                                                     20 Yr. Program (2010-2015
                                                                                                                                                                                                                                                                                                                                                                                                                            Deer
                                                                                                                     Cities




                                                                                                                                                                                                                                                                                                                                                                                                                                                 Market
                                                                                                                                                                                                                                                                                                                                                                Regal
                                                                                            0        0.2 0.4                                   0.8                           1.2             1.6
                                                                                                                                                                                                                                                                                2007                                                  Winger




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      Ch
                                                                                                                                                                                               Miles




                                                                                                                                                                                                                                                                                                                                                  Shady Slop




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         ro
                                                                                                                                                                                                                                                                                                                                   2011




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            ni c
                                                                                                                                                                                                                                                                                                                                                                                                                      Center




                                                                                                                                                                                                                                                                                                                                                                                                                                             on
                                                                                                                                                                                                                                                                                                                          Center




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                le
                                                                                                                                                                                                                                                                                                                                                                                                                                          ls
                                                                                                                  Dorset




                                                                                                                                                                                                                                                                                          2007                    2010




                                                                                                                                                                                                                                                                                                                                                                                                                                       Ti
                                                                                                                                                                                                                                                                                                                  Perry
                                                                                                                                                                                                                                                                                                                                                                                                                                                                 Farwe ll




                                                                                                                                                                                                                                                                                                                                                      e
                                                                                                                                                                                                                                                            Farwell              2002
                                                                                                                                                                                                                                                                                                              s
                                                                                                                                                                                                                                                                                                  st   i ng
                                                                                                                                                                                                                                                                                               Ha                                                                                                       Hastings
                                                                                                                                                                                                                                                           1998
                                                                                                                                                      Waikiki




                                                                                                                                                                                                                                                                                                                                                                                                                                   Market
                                                                                                                                                                                                                                                                                                                                                                                                                                                                             Peone
                                                                                                                                                                                                                                                            Ruby




                                                                                                                                                                                                   Pin                                   1996




                                                                                                                                                                                                                                                                                                                                                                                                                                                          e
                                                                                                                                                                                                       eh




                                                                                                                                                                                                                                                                                                                                                                                                                                                        n
                                                                                                                                                                                                            ill




                                                                                                                                                                                                                                                                                                                                                                                                                                                    yen
                                                                                                                                      Hatchery




                                                                                                                                                                                                                                                                                                                                                                                                                                                Che



                                                                                                                                                                                                                                                                                                                                                                                                                                                                           Morrill
                                                                                                                                                                                                                             Mill




                                                                                                                                                                            2003                                                                                   1999
                                                                                                                                                                                                                                                                                                                                                                                                                                                                               Stoneman
                                                                                                                                                                                                                            2002                                       Elcliff
                                                                                                                                                                                                                                                                                                                                                                                          es
                                                                                                                                                                                                                                                                                                                                                                                      Grav




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          Fairview
                                                                                                                                                                    North Five Mile                     1997                            Pinewood 1997                                                                                      Hawthorne
                                                                                                                           Dorset


                                                                                                                                          Prescott




                                                                                                                                                                                                                                                                                                                                                                 Kaiser South Plant
                                                                                                                                                                                                                            Hawthorne           Hawthorne
                                                                                                                                                                                                                                                                   2000
                                                                                                                                                                                                                             Westover                                                                                                                                                                                                       Pip
                                                                                                                                                                                                                                                                                                                                                                                                                                                er
                                                                                                                                                                                                                                                                 es
                                                                                                                                                                                                                                                            Gra v
                                                                                                                                                                                                                                        2000    1996
                                                                                                                                                                                                                                                                     Colfax




                                                                                                                                                                                                                                                                                                                                                                                              t
                                                                                                                                                                                                                                                                                                                                                                                           ke
                                                                                                                                                                Five Mile




                                                                                                                                                                                                                                                                                Holland
                                                                                                                                                                                                                                                                                                                                                                                         r
                                                                                                                                                                                                                                                                                                                                                                                      Ma




                                                                                                                                                                                   Johannsen
                                                                                                                                                                                                                                                              y2




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     St Michaels
                                                                                                                                                                                                                                                       s
                                                                                                                                                                                                                                                 Barne
                                                                                                                             Dorset




                                                                                                                                                                                                                                                            Hw
                                                                                                                                                                                                                    Cedar
                                                                                                                                           Prescott




                                                                                                                                                                                                                                                                                                                                                                                                                                              h

                                                                                                                                                                                                                                               1997
                                                                                                                                                                                                                                                                                                                                                                                                                                           c
                                                                                                                                                                                                                                                                                                                                                                                                                                        la
L:\ENVIR IMPACTS\2000 projects\20062 SPK Co WW Plan\Phase 1\gis\spokane_sewer.mxd




                                                                                                                                                                                                                                                                                                                                                                                                                                er




                                                                                                                                                                                                                                                                                                                           Magnesium
                                                                                                                                                                                                                                                                                                                                                                                                                               G




                                                                                                                                                                                                                                                            Magnesium
                                                                                                                                                                                                                            Northview




                                                                                                                                                          Strong

                                                                                                                                                            Parkw ay
                                                                                                                                                                                              Austin




                                                                                                                                                                                                                                                 1998                                                                                                                                                                                Lincoln
                                                                                                                                                                                                                      ar
                                                                                                                                                                                                                  Ced




                                                                                                                                                                                                                                                                                         Lincoln
                                                                                                                                       Lincoln
                                                                                                                                                                                                                                        1995
                                                                                                In
                                                                                                  dia
                                                                                                     n
                                                                                                     Tr
                                                                                                       ai




                                                                                             CITY OF SPOKANE
                                                                                                         l




                                                                                                                                                                                                                                        1992       1993
                                                                                    N
                                                                                     in
                                                                                        e
                                                                                        M
                                                                                            ile




                                                                                                                                Map data shown are the property of the                                                                                                                                                                                                                                                                                     FIGURE 1-2
                                                                                                                                sources listed below. Inaccuracies may
                                                                                                                                exist, and Adolfson Associates, Inc. implies                                                                                            NORTH SPOKANE PLANNING AREA
                                                                                                                                no warranties or guarantees regarding any
                                                                                                                                aspect of data depiction.                                                                                       SPOKANE COUNTY REGIONAL WASTEWATER TREATMENT PLANT
                                                                                                                                 Source: Spokane Co. GIS, 2001                                                                                                          SPOKANE COUNTY, WASHINGTON
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 SPOKANE COUNTY REGIONAL WASTEWATER TREATMENT PLANT
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       SPOKANE COUNTY, WASHINGTON




                                                                                                                                                                                                                              Molte r
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        SPOKANE VALLEY PLANNING AREA
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               FIGURE 1-3




                                                                                                                                                                                                        Molter                                                                                                                                                                       o se
                                                   Ormon d                                                                                                                       Mitch ell                                                                                                                                                                                                     in im
                                                                                                  Molter
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Sewered Projects (1995-1999)




                                                                                                                                                                                                                                                                                                                                                                                                                      Qu
                                                                                                                                                                                                                                                          Garry
                                                                                                                                                                                                                                                                                               Interceptors and Extensions




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 15 Yr. Program (2006-2010)
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 20 Yr. Program (2010-2015)
                                                                                                                                                                                                                                                                                                                                                                                                 Priority Sewer Service Area




                                                           Drury                                                                                                                                                            McKin zie                    McK inzie
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 6 Yr. Program (2000-2005)




                                                                                                                                                               o     n
                                                                                                                                                                                                                                                                                                                                                   Molte r




                                                                                           Garry                                                            ds
                                                                                                                                                    Ma
                                                                                                                                                                                  l
                                                                                                                                                                                                                                                                                                                                                                                                                                                     Sewer Project Priorities




                                                        McK inzie                                                                                                               na                                      e
                                                                                           Lynden                                                                         Sig                                      La k
                                                                                                                                                                                                      erty
                                  Ly nd en                                                                                                                                                        Lib
                                                                                                                                                                                                                                                                                                                                                                                                                                 Urban Growth Area




                         Hill                                                                        Arden
                                                                                                                                                                                90




                                                               Arden
                                                                                                                                                                                                                                                                                                                                                                                Waterbodies




                                                                    Harv ard
                                                                                                                                                                                                                                                                                                                                              Proposed
                                                                                                                                                                                              n ey




                                                                                                                                                                                                                                                                                                                                                                     Streams
                                                                                                                                                                                                                   on
                                                                                                                                                                                         K en




                                                                                Corriga n
                                                                                                                                                                                                                                                                                                                                                             Roads
                                                                                                                                                                                                            rl s




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               Cities
                                                                                                                                                                                                                                                                                                                                 Built
                                                                                                                                                                                                          Ca
                                                          t




                                                                                               Ken ney
                                                               er
                                                          Gilb




                                                                                                                                                                                                                                                                            ry




                                                                    Snow Owl                                                                                                                                                                                                                                                                                                                                                                                                                                    Cam pbell
                                                                                                                                                                                                                                                                           Hen




                                                                      Kare n                   Ash ton                                                                                                                                                                                                                                                                                         Salte se La
                                                                                                                                                                                                                                                                                                                                                                                                           ke
                                                                                         Cam pbe ll                                                                   Glenbrook
                                                    Cam pbell           Kari
                                                                                                                                    Meyers
                                                                                                                                                                                                                                                 2015




                                                                                                                                                                                 Alad din                                 Hodg es
                                                                                                                                                                                         2015
                                                                                                                                                                                                        Cataldo




                                                                                                                                                                                                                                       an
                                                                                                                                                                                                                             McM ill
                                                                                                                                                       n
                                                                                                                                                                                                                                   2015




                                                                                                                                            McM illa                                                                                                                                                                                     Barker
                                                                                                                                                                                                                                             Bark er       Jo el   Bark er
                                                                                                                                       Joel
                                                                                                                                                                                                                                                                                                                                                             32nd




                                                                                                                        Don wo od                                                                                                                                                                                                                                                             Lin ke
                                                                                                                                                                                                           I 90




                                                                                                                                                                                                                              Greenacre s                                                                                                                                                                                                                                                                                                                          Sadd le Ridge
                                                                                                                                                                                Greenacre s
                                                                                                                             Velo x
                                                                                                                                                                                                                            2012
                                                                                                                                                     Montg omery




                                                                                                                                                                                                                                                 2014




                                                                                                                                                                                                 Long
                                                                                                                                                                                  2015




                                                                                  Lon g
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  Chap man
                                                                                                                        Tschirley
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   ke      n
                                                                                                                                                                                                                  Flora                                                                                                                                                                                                                                                                                                                                                                                                 Li
                                                                                                                                                                                                                                                                                                                                          Chap man
                                                                                                                                Flora                                                                                                        Stee n                                                                                  n
                                                                                                                                                                                                                                                                                               S te e
                                                                                                                                                                                                                                          1998




                                                                                                                                                                                                                                                                                           Conk lin                                                                                                                                                                                                                         Conklin
                                                                                                                                                                                                                              2011




                                                                                                                                                                                                                                                                                                                                                                                          Conk lin
                                                                                                                                                                                                                                                                             2011




                                                                                                                                                                         P it
                                                                                                                                                                                                                                                                                                                                                              se




                                                                                                                                                                                Flo ra
                                                                                    1999




                                                                         La rch
                                                                                                                                                                                                                                                                                                                                                           lte
                                                                                                                                                                                                                                                                                                                                                         Sa
                                                                                                                                                                                                                  1996




                                                                                                                                                                                                                                                                                                                                                             Sulliv an
                                                                                                                                                                                                                                                                  1996




                                                                                    lf   ord                                                                                                                                                                               New er                                                                                  Sommer
                                        Jaco bs




                                                                                 To                                                                                                                                         Sommer                                                   St Charles
                                                                                                                                                                                                                                                                                                                                                                                                                                   2012
                                                                                                                                                                                                                                                                                                                                                   Progress
                       Robbin s
                                                                                                                                                                                                 I 90




                                                                                                                                                                                                                                                                                              1994 1991




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            rk
                                                                                                                                                                                                                                                                                  Burn s
                                                                                                                                                                                                                               2004




                                                                                                                                                                                                                                                  Burn s




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       w Pa
                                                                                    2014




                                                                      Prog ress                                                                                                                                Burn s
           Brevie r




                                                                                               Burn s                                                                                                         Adams




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 Mo rro
                                                                                                                                                                                                                                                                                                                                                                                                          Ada ms
                                                                                                                                                                                                                                                         2006

                                                                                                                                                                                                                                                                           2010




                                                                                                                                                                                                                                                                                                                                                             Best
                                                   er
                                                                                                                                                                                                                   2006




                                               k                                                                                                                                                                            Best Best
                                          Fo r
                                                                                                                                                                                                                                            1986




                                                                               Rees                                                                                                                                                                                               Bolivar                                                         Bolivar                                                         Evergreen
                                                                                          2013




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 Miles
                                                                       Bann en
                                                                                                                                                                                                                                                                                                                                                  1994


                                                                                                                                                                                                                          Evergreen                                                                                                                                                                                                                  Ma me r
                                                                                                                                                                                                                                                                Mamer                  Mamer
                                                                                                                                                                                                                                                                                                                                                                                                         SR 27
                                                                                                                                                                                                                                                                                            1991




                                                                                                                                                                                                                                                                  Bla ke
                                                                                                                                                                                                                                                         1990




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               2.4
                             Evergreen                                                                                                                                                                                                                                                      Blake
                                                                                                                                                                                                          2004




                                                                                                                                                                                                                             Mamer
                                                                          2013




                                                                                                                                                                                                                                Blake
                                                                                         Mayh ew                                                                                                                                                                                       Keller
                                                                                                                                                                                                                      McCabe                                     Clin ton
                                                                                                                                                                                         2004




                                                                                                                                                                                                                               Clinton                                                                                                              McDonald
                                                                                                                                                                                                                                                                                             e
                                                                                                       2012




                                                                                                                                                                                                                                                                                       lte s




                                                                                                                                                                                                                     McDonald




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               2001
                                                                                                                                                                                                                                                                                                                                       1991
                                                                                                                                                                                                                                                                           1995 1988




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          2002
                                                                                                                                                                                                                                                                                 Ho S a




                                                                         McD onald                                                                                                                                      Woodlawn
                                                                                                                                      1999




                                                                                                                                                                                                                                                         Leta
                                                                                                                                                                                                                  Vercler
                                                                                                                                                                                                                                                                                             k




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               1.8
                                                                                                                                                                                                                                                                                                                                                                                                                                                 Madison
                                                                                                                                                                                                                                                                                   u


                                                                                                                                                                                                                                                                                                                                                                Collins
                                                                                                                                                                                                     1985
                                                                                                                                                                         2003 2003




                                                                                                                                                                                                                                          Houk                                                                                                                                 Pine s
                 Bige low Gulch




                                                                                                                                                                                                                                                                Houk
                                                                                                                                                                                                                                      Pines




                                                                                                                                                                                                                                                                                                                                                              2001
                                                                                                                                                                                                                                            Rob ie


                                                                                                                                                                                                                                                                                                                             19961995 1990 1997
                                                                                                                                                                                                                    Robie                                                                                                                                                          s
                                                                                                                                                                                                                                                                                         Union                                                                                  eve
                                                                                                                                                    1998




                                                                                                                                                                                                                                     Union Union                                                                                                                                                                                                            s
                                                                                                                                                                                         Union                                                                                                                                           Wilbur                       Wilbu r Re                                                            nd                                                                                               a
                                                                                                                                                                                                                                                                                  Fox                                                                                                                                                     Sa                                    Bates                                                         a n M ic
                                                                                                                                                                                                                      2000 2003




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Dis h m




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               1.2
                                                                                                                                                                                                                                                         Wilbu r                                                                                                      Bowd ish
                                                                                                                                     2011




                                                                                                                                                                                         Wilbu r




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    2000
                                  Perrin e                                                                                                                                                                                     Bates




                                                                                                                                                                                                                                                                                                                                                                                                 1999
                                                                                                                                                                                                                                                            2005 1994 1998
                                                                                                                                                                                                                                                                                                                                             Skipw orth                                                                                                                                                                                                                         Pierce
                                                                         Fruit Hill                                                                                                                                                  Skipw orth
                                                                                                                                                                                 2009




                                                                                                                                                                                                                                                                                                                                            Pierce




                                                                                                                                                                                                                                                                                                                                                                 1990
                                                                                                                                                                                                                                                                                                                                                                               Gillis
                                                                                                                                                                                                                                     Pierce                                                                                                 Glen n
                                                                                                                                                                                                                                                                     1992
                                                                                                                                                           1997




                                                                                                                         e
                                                                                                                  P ie rc                   a ms                                                                            Glenn                                                                                                                                        Van Marter                                                          Univ ersity
                                                                                                                                    Willi                                                                                                                                        University




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               0.3 0.6
                                                                                                                                                                                                                                                 1987
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 Felts
                                                                                                      Van Marter




                                                                                                                                                                                                                                                                                                                                                                                                           1993


                                                                                                                                                                                                                                                                                                                                                                                                                                                                                2014
                                                                                                                                                                                                                                                                                            Balfour
                                                                                                                                            le r
                                                                                                                                                                                                                  1999

                                        Lehman                                                                                         B ut                                       Ray mon d                                                                                                                                                                                                                                                 afe
                                                                                                                                                                                                                                                                                                                                                                                                                                                r


                                                                                                                                                                                                                                                                2005
                                                                                         Raymond




                                                                                                                                                                                                                                                                1989
                                                                                                                                          is                                                                                       Felts                                                                                                                                                                                                              S ch
                                                                                Hutton Settlement                                     Dav                                       Felts
                                                                                                                                             le r




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                Holm an
                                                                                                                                       Fo w                                          Herald Herald
    Tate




                                                                                                                                                                                                                                     Walnu t
                                                                                                                     2002




                                                                                                                                                                                                                                                             2005
                                                                                                                                       MILLWOOD




                                                                                                                                       Woodruff                                        Woodruff                                2001                                                                                                                                                                                                                     Locu st
                                                                                                                                                                                1999




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               0
                                                                                                                                                                                                                                           Farr
                                                                                                                                                                                                              2001
                                                                                                                             Farr                                                                                                       Locus t
                                                                                                                                                                                                                                                                      an                                                                                                                                                                                        Schafer Branch
                                                                                                                                                   Maple                                                                                 Willow                  hm
                                   Old Argonne                                                                        Willo w                                                            Mulla n                              Argon ne                     Dis




                                                                                                                                                                                                                                     2003
      Bruce                                                                                                       Marguerite Marguerite


                                                                                                                                                                                                                  2001
                                                                                                                                                                                     1998
                                                                                                                                                                   Dale                                                                            Sargent
                                                                                                                              Sarg ent
                                                                                                                                                    Laura                                                                Bessie
                                                                                   2003




                                                                                                                                                                                                                                                        2001
                                                                                                                   Bessie
                                                                                                                                        Sipple                     Vista                                                  Vista
                                                                                                V is ta                                 Lewis                                        Dick                         Dick                 Dick
                                             Jense n




                                                                                                                                                                                                                               1996
                                                                                                                      2006




                                                                                                                                                         2006




                                                                                                                                                                                                                                                                                    2002
                                                                                                                                                                                                  1997
                                                                                                                                      2005


                                                                                                                                                                                                                                        Ella
                                                                                                                                                                          Ella
                                                                                               E lto n                                        Ely                                     Ella
                                                                                                                                                                                                                                                         Park
                                                                                                 la
                                                                                               El




                                                                                                                                                     2004




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               exist, and Adolfson Associates, Inc. implies
                                                                                                                                                                                                                                                         Girard




                                                                                                                                                                                                                                                                         2001




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               no warranties or guarantees regarding any
                                                                                               te r




                                                                                                                                                                                                                  2005



                                                                                                                                                                                                                                            2005
                                                                                                           Cen                                                                                                                Lily




                                                                                                                                                   2005




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               sources listed below. Inaccuracies may
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               Map data shown are the property of the
                                                                                                                                                                                                                                                          1996

                                                                                                                                                                                                                                                                      2002
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               Dyer
                                    Bradley




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            Source: Spokane Co. GIS, 2001
          e
              E sp                                                                                                                                                                                                                                                                                                                                                                                                             Eastern




                                                                                                                                                                                                                                                                                                                19942012
                                                         Thierm an                                                                                                              Dolla r                                       Dyer           Dyer
                                                                                                                                                                                                                                                            Eastern
                                                                                                                                                                                Eastern                                                                                                                                                                                                                                                                                                                                                                                       e ry
                                                                                                                                                                                                                               Lake                                          Dickey
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                                                                                                                                                                                                        CITY OF SPOKANE




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Lincoln                                                                                                                                                                                                                                                                                      L:\ENVIR IMPACTS\2000 projects\20062 SPK Co WW Plan\Phase 1\gis\spokane_sewer2.mxd
Spokane County WWTP Final Supplemental EIS


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Page 1-6                                     December 2002
                                                         Spokane County WWTP Final Supplemental EIS



Purpose of the Project
The objective of the new proposed Spokane County Regional Wastewater Treatment Plant is to
accommodate the projected growth in the County service area; to provide reliable wastewater
service to its customers; and to improve water quality in the region. The need for a new
treatment plant was established in the Wastewater Facilities Plan adopted by the County in
February 2002. The Wastewater Facilities Plan identified viable alternatives for expansion of
wastewater treatment capacity in Spokane County and recommended construction of a new
treatment plant in the western part of the Spokane Valley to meet its overall objectives. The
following goals guided the planning process:

•   Protect public health;
•   Provide reliable wastewater service—both near-term (20 years) and long-term (50 years);
•   Protect and improve the region's water resources—surface water and groundwater;
•   Provide for growth in concurrence with the Growth Management Act;
•   Provide cost-effective solutions for County ratepayers;
•   Ensure the County has adequate authority and control to meet future wastewater needs;
•   Gain approval by the public, elected officials, and regulatory agencies.

Following adoption of the Wastewater Facilities Plan, the County evaluated alternative locations
throughout the western part of the Spokane Valley prior to selecting the two sites being
evaluated in this Draft Supplemental EIS. The alternatives evaluated are described in Chapter 2
of this document.
SUMMARY OF IMPACTS
The proposed action alternatives discussed in this Supplemental EIS have similar impacts.
Impacts related to construction are the most significant. Traffic and business disruptions will be
temporary but unavoidable during the 2.5 year construction period. The Alki/Fancher alternative
has a high possibility of contaminated soils which would require removal and containment.
Once in operation, this site would have the most potential to adversely affect retail businesses,
while the Stockyards Alternative would redevelop vacant industrial property. Two outfall
options have been evaluated: the Rebecca Street Outfall option has some potential to affect
groundwater quality, while the Springfield Avenue Outfall option, because of its distance from
the treatment plant site alternatives, would involve more traffic disruptions during construction
and long-term property displacement. The following matrix (Table 1-1) summarizes the
potential impacts discussed in Chapter 3 of this Supplemental EIS. Table 1-1 in this Final
Supplemental EIS completely replaces Table 1-1 in the Draft document.




December 2002                                                                              Page 1-7
Spokane County WWTP Final Supplemental EIS


                                                           Table 1-1 Impact and Mitigation Summary
Element of the                                                                              Alki/Fancher                    Outfall Options              No Action Alternative
                                  Stockyards Alternative
 Environment                                                                                 Alternative
                   Impacts:                                                          Impacts:                           Impacts:                         Impacts:
                   • Dust from construction activities would contribute to           • Same as Stockyards               • Dust from construction         • No construction-related
                     particulate matter problems in the construction area.             Alternative.                       activities would contribute      impacts to air quality would
                   • Dust, emissions from construction vehicles and equipment,       • Dust and/or odors from             to particulate matter            occur under the No Action
                     including odors could be detectable by employees in nearby        construction and operation         problems in the construction     Alternative.
                     businesses and passing motorists.                                 activities could be blown into     area.                          • Potential increased odors
                   • Employee, fleet, and other vehicle exhaust would                  the shopping area south of the   • Dust and emissions from          from the SAWTP facility if it
                     incrementally contribute to air pollution.                        site in winter when winds are      construction vehicles,           reached and exceeded its
                                                                                       from the northeast.                equipment, including odors       treatment capacity.
                   • Pump stations could produce small amounts of VOCs and
                                                                                                                          could be detectable at
                     odor
                                                                                                                          nearby businesses or
                   • Minimal odors at treatment plant with advanced control                                               facilities and by passing
  Air Quality        methods                                                                                              motorists.
                   Mitigation:                                                       Mitigation:                        Mitigation:
                   • Implement a dust control plan for construction activities.      • Same as Stockyards               • Implement a dust control
                   • Shut off engines when not in use.                                 Alternative.                       plan for construction
                                                                                                                          activities.
                   • Maintain equipment and vehicles in good condition.
                                                                                                                        • Shut off engines when not
                   • Service odor control units regularly.
                                                                                                                          in use.
                   • Cover and/or enclose all odor generating activities and
                                                                                                                        • Maintain construction
                     processing areas.
                                                                                                                          equipment and vehicles in
                   • Install odor scrubbing system prior to exhausting outdoors.                                          good condition.
                   • Distance between plant structures and the property line would
                     meet appropriate zoning requirements.
                   Impacts:                                                          Impacts:                           Impacts:                         Impacts:
                   • Construction-related erosion could impact the Spokane River     • Same as Stockyards               • Construction-related           • Under the No Action
                     at the outfall end of the conveyance route and at the outfall     Alternative.                       erosion could impact the         Alternative, water quality
                     construction area.                                                                                   Spokane River at the outfall     impacts to the Spokane River
                                                                                                                          end of the conveyance route      could occur starting in 2007
                   • Should an inflow pipeline break, untreated sewage could leak
                                                                                                                          and at the outfall               when the existing SAWTP
Surface Water        from the pipe.
                                                                                                                          construction area.               would exceeded its treatment
                   • Benefit: Elimination of a portion of the County’s wastewater                                       • Impacts to water clarity         capacity potentially resulting
                     from a portion of the City of Spokane Conveyance System                                                                               in violations of water quality
                                                                                                                          from increased sediments
                     (Interceptor No. 05) would reduce CSOs in the area.                                                                                   standards and possible fines
                                                                                                                          during construction.
                                                                                                                                                           and judicial control to
                                                                                                                                                           regulate water quality.




Page 1-8                                                                                                                                                                December 2002
                                                                                                                             Spokane County WWTP Final Supplemental EIS


Element of the                                                                             Alki/Fancher             Outfall Options              No Action Alternative
                                  Stockyards Alternative
 Environment                                                                                Alternative
                 Mitigation:                                                        Mitigation:                 Mitigation:
                 • Develop comprehensive erosion and sediment control plans         • Same as described for     • Same as described for
                   prior to construction for each phase of construction.              Stockyards Alternative.     Stockyards Alternative.
                 • Use best management practices for all construction activities                                • Implement requirements of
                   to minimize erosion and sedimentation impacts.                                                 the Corps of Engineers
 Surface Water                                                                                                    permit and WDFW HPA for
                 • Comply with conditions of the NPDES stormwater general                                         the in-water work
    (contd)        permit for construction issued by Ecology.
                                                                                                                  associated with installation
                 • Develop a spill prevention and response plan to reduce the                                     of the outfall diffuser.
                   risk of surface water contamination.
                 • Effluent discharge would meet all applicable water quality
                   regulations.
                 Impacts:                                                           Impacts:                    Impacts:                         Impacts:
                 • Groundwater quality could be impacted if spills of fuels or      • Same as described for     • Effluent discharged at the     • The County would not be
                    chemicals are not properly contained and seep into                Stockyards Alternative.     Rebecca Street location has      able to continue its Septic
                    groundwater.                                                                                  minimal potential for viral      Tank Elimination Program
                                                                                                                  contamination of the             under the No Action
                 • Groundwater contamination could occur if contaminated
                                                                                                                  Aquifer.                         Alternative, potentially
                    sites are encountered during construction.
                                                                                                                                                   resulting in contamination
                 • Should an inflow pipeline break, untreated sewage could                                                                         of the Aquifer.
 Groundwater        leak from the pipe and possibly reach the Spokane Aquifer.
                 Mitigation:                                                        Mitigation:                 Mitigation:
                 • Mitigation measures to minimize construction impacts to          • Same as described for     • Same as described for
                   groundwater would include those described in the Surface           Stockyards Alternative.     Stockyards Alternative.
                   Water section of this EIS.                                                                   • If Rebecca Street outfall is
                 • Develop a spill prevention and response plan to reduce risk of                                 selected, the County will
                   groundwater contamination.                                                                     conduct periodic virus
                                                                                                                  monitoring.
                 • Require monitoring of on-site soils for contamination, and
                   mitigate contaminated soils in accordance with local, state,                                 • If unacceptable levels of
                   and federal regulations if encountered during construction.                                    viruses are detected, the
                                                                                                                  County would expand
                                                                                                                  chlorine contact at the City
                                                                                                                  wells.




December 2002                                                                                                                                                          Page 1-9
Spokane County WWTP Final Supplemental EIS


Element of the                                                                              Alki/Fancher                     Outfall Options             No Action Alternative
                                  Stockyards Alternative
 Environment                                                                                 Alternative
                   Impacts:                                                          Impacts:                            Impacts:                        Impacts:
                   • Construction-related noise impacts would include noise from     • Same as described for the         • Noise from excavation and     • No noise impacts would
                     excavation activities and machinery, heavy trucks, and            Stockyards Alternative.             boring activities and           occur under the No Action
                     workers’ vehicles that would be detectable by people in         • The potential for hazardous         machinery, heavy trucks,        Alternative.
                     nearby businesses and motorists at the plant site along the       materials to be present on site     and worker's vehicles would   • No potential to disrupt
Environmental        conveyance route.                                                                                     occur.
                                                                                       and exposed during                                                  hazardous materials would
Health             • Operation-related noise impacts would include heavy trucks        construction is high.             • In the unlikely event of        occur during the No Action
                     for biosolids pick-up and disposal, on-site machinery,                                                treatment plant failure,        Alternative.
                     workers’ vehicles, and voices.                                                                        untreated effluent could be
                   • The potential for spills and leaks to occur during operation                                          discharged into the Spokane
                     exists.                                                                                               River.
                   Mitigation: Noise                                                 Mitigation:                         Mitigation:
                   • Construction activities would occur between permitted           • Same as described for the         • Same as described for the
                     construction hours (6 a.m. to 10 p.m. in the City of Spokane,     Stockyards alternative.             Stockyards Alternative.
                     and 7 a.m. to 10 p.m. in Spokane County).
                   • Modern construction equipment that minimizes noise impacts
                     would be used throughout the duration of construction.
                   • Muffler systems on heavy construction equipment would be
                     maintained in good working order to ensure maximum noise
                     attenuation.
                   • Facility vehicles and biosolids trucks would be kept in good
                     working order.
                   • Emergency generator testing would be scheduled to minimize
                     noise impacts to surrounding properties.
                   • Sound-attenuating structures, including buildings and other
                     measures, would be maintained in good working condition.
                   Mitigation: Hazardous Materials
                   • Hazardous materials would be properly handled on-site to
                     comply with applicable state and federal standards and
                     regulations.
                   • A spill prevention and response plan would be developed for
                     plant operation.
                   • A Level 1 Site Assessment would be conducted at the plant
                     site prior to construction.
                   • Incorporate spill prevention and response plan requirements
                     in construction contracts to reduce vehicle and equipment
                     fuels and fluid spills.
                   • If sites are found to be contaminated, appropriate measures
                     would be implemented to initiate hazardous materials
                     cleanup.



Page 1-10                                                                                                                                                              December 2002
                                                                                                                                    Spokane County WWTP Final Supplemental EIS


Element of the                                                                           Alki/Fancher                      Outfall Options              No Action Alternative
                                Stockyards Alternative
 Environment                                                                              Alternative
                 Impacts:                                                         Impacts:                             Impacts:                         Impacts:
                 • Construction activities may affect urban wildlife species      • Same as described for              • Same as described for          • Under the No Action
                   present on the site.                                             Stockyards Alternative.              Stockyards Alternative.          Alternative, no changes
                 • A deteriorated osprey nest would be removed from this site.                                         • Construction of the outfall      would take place on project
                                                                                                                         would result in temporary        sites, conveyance routes, or
                                                                                                                         impacts to fish and fish         outfall locations, therefore no
                                                                                                                         habitat from turbidity,          impacts to plants or animals
                                                                                                                         noise, and presence of           would occur.
                                                                                                                         construction equipment.
                                                                                                                       • Construction would result
                                                                                                                         in the removal of some
   Plants and                                                                                                            vegetation along the
    Animals                                                                                                              riverbank.
                 Mitigation:                                                      Mitigation:                          Mitigation:
                 • No significant impacts to plants or animals are expected,      • No significant impacts to          • The river bank would be
                   therefore no mitigation is required.                              plants or animals are expected,     revegetated following
                 • Landscaping would improve conditions and could provide            therefore no mitigation is          construction.
                   habitat for some urban wildlife species.                          required.                         • Mitigation measures to
                 • The County will install an osprey nesting platform along the   • Landscaping would improve            protect water quality in the
                   Spokane river to replace the deteriorated nest to be removed     conditions and could provide         Spokane River during
                   from the site, in coordination with Washington Department of     habitat for some urban wildlife      construction would also
                   Fish and Wildlife.                                               species.                             minimize impacts to fish.

                 Impacts:                                                         Impacts:                             Impacts:                         Impacts:
                 • Construction and related traffic could disrupt existing        • Same as described for              • No impacts to outfall areas.   • Under the No Action
                   businesses.                                                      Stockyards Alternative.                                               Alternative, no impacts to
                 • Construction of a new treatment plant and pump stations        • The Union Pacific Railroad                                            land use or shorelines would
                   would require the initiation of the County’s property            Automobile Distribution                                               occur.
                   acquisition process.                                             Center would need to be
Land Use and                                                                        relocated.
                 • Spokane County would need to obtain construction easements
Shorelines         for conveyance pipeline sections that do not follow existing   • Acquisition of the Alki/
                   road rights-of-way.                                              Fancher site would preclude
                 • Acquisition of property for pump stations would preclude use     light industrial or commercial
                   as residence or business.                                        uses.
                 • Acquisition of the Stockyards site would preclude future
                   development by industrial businesses.




December 2002                                                                                                                                                                 Page 1-11
Spokane County WWTP Final Supplemental EIS


Element of the                                                                                   Alki/Fancher                       Outfall Options                No Action Alternative
                                   Stockyards Alternative
 Environment                                                                                      Alternative
                   Mitigation:                                                           Mitigation:                            Mitigation:
                   • Spokane County will meet with businesses in the vicinity of         • Same as described for                • There would be no impacts,
                     the treatment plant site and establish ways to mitigate               Stockyards Alternative.                so no mitigation is needed.
Land Use and
                     potential construction impacts to their business operations.        • Relocation of the Union
Shorelines
                   • A point of contact would also be provided to answer                   Pacific Railroad Distribution
(cont.)              complaints and receive suggestions from local residents and           Center could be facilitated by
                     businesses during construction.                                       current efforts to consolidate
                                                                                           rail transportation in the valley.
                   Impacts:                                                              Impacts:                               Impacts:                           Impacts:
                   • Indirect impacts to recreational facilities could include           • Same as described for the            • Recreational watercraft          • No impacts to recreation
                     temporary construction-related dust, noise, odors, and traffic        Stockyards Alternative.                users along the Spokane            would occur under the No
                     that may disrupt recreation activities.                                                                      River and users of the             Action Alternative.
Recreation                                                                                                                        Centennial trail may
                                                                                                                                  experience noise, dust, and
                                                                                                                                  odor from construction near
                                                                                                                                  the Spokane River.

                   Mitigation:                                                           Mitigation:                            Mitigation:
                   • Develop a notification system to alert users of recreational        • Same as described for the            • Modern construction
                     facilities about possible street disruptions during construction.     Stockyards Alternative.                equipment techniques that
                   • Modern construction equipment techniques that minimize                                                       minimize dust, noise, and
                     dust, noise, and odor should be used throughout the                                                          odor should be used
                     construction duration.                                                                                       throughout the construction
                   • Widely publicize construction dates and routes.                                                              duration.
                   • Coordinate construction activities with recreational service                                               • In the event of a spill at the
                     providers.                                                                                                   outfall, the County would
                                                                                                                                  provide immediate public
                                                                                                                                  notice, including posting
                                                                                                                                  signs along the shoreline
                                                                                                                                  warning recreational users
                                                                                                                                  that it is unsafe to come in
                                                                                                                                  contact with the water.




Page 1-12                                                                                                                                                                        December 2002
                                                                                                                                 Spokane County WWTP Final Supplemental EIS


Element of the                                                                               Alki/Fancher               Outfall Options             No Action Alternative
                                 Stockyards Alternative
 Environment                                                                                  Alternative
                 Impacts:                                                             Impacts:                      Impacts:                        Impacts:
                 • Temporary construction-related aesthetic impacts would             • Same as described for       • Construction mitigation       • No impacts to aesthetics
                   include dust, noise, truck traffic, and odor.                        Stockyards Alternative.       same as described for           would occur under the No
                 • Spokane River recreational users may be deterred from river-                                       Stockyards Alternative.         Action Alternative.
                   associated activities due to construction activity.                                              • Shoreline would be
                 • Structures at the treatment plant location would be somewhat                                       revegetated following
                   out of scale with the surrounding properties and would be                                          installation of the outfall
Aesthetics         noticeable to adjacent properties and passing motorists.                                           pipe.
                 • Lighting from the facility could be noticeable to surrounding                                    • There would be no
                   properties.                                                                                        operation impacts.
                 • Pump stations would be noticeable structures in the
                   community neighborhood.



                 Mitigation:                                                          Mitigation:                   Mitigation:
                 • BMPs would be implemented to minimize dust and odors.              • Same as described for the   • Construction mitigation
                 • Restricting construction activities to Spokane County and            Stockyards Alternative.       same as described for the
                   City of Spokane designated hours.                                                                  Stockyards Alternative.
                 • Use flaggers to help control traffic flow; post notices of
                   construction periods.
                 • Design the wastewater treatment plant and pump stations to
                   be compatible with adjacent neighborhoods.
                 • Provide visual screening of the facility with fencing,
                   vegetation, or architectural treatment.
                 • Odor control measures would be included in plant design, and
                   state-of-the-art lighting systems would be included to
                   minimize glare.
                 Impacts:                                                             Impacts:                      Impacts:                        Impacts:
Cultural         • Impacts to buried historic or cultural resources are possible as   • Same as described for the   • Same as described for the     • No impacts to historic or
                   a result of excavation and earth moving activities.                  Stockyards Alternative.       Stockyards Alternative.         cultural resources would
Resources                                                                                                                                             occur under the No Action
                                                                                                                                                      Alternative.




December 2002                                                                                                                                                           Page 1-13
Spokane County WWTP Final Supplemental EIS


Element of the                                                                                Alki/Fancher               Outfall Options                No Action Alternative
                                   Stockyards Alternative
 Environment                                                                                   Alternative
                   Mitigation:                                                         Mitigation:                   Mitigation:
                   • Conduct further cultural resources investigations of the          • Same as described for the   • Conduct cultural resource
                     treatment plant sites.                                              Stockyards Alternative.       investigation of outfall site.
                   • Should cultural resources of historic significance be found                                     • Should cultural resources of
                     during construction of either alternative, work would                                             historic significance be
                     immediately stop and the appropriate agencies, including                                          found during construction
                     Office of Archaeology and Historic Preservation and                                               of either alternative, work
Cultural             representatives of the Colville Confederated Tribes, Spokane                                      would immediately stop and
Resources            Tribe, and the Yakama Nation would be contacted.                                                  the appropriate agencies,
                                                                                                                       including Office of
(cont.)                                                                                                                Archaeology and Historic
                                                                                                                       Preservation and
                                                                                                                       representatives of the
                                                                                                                       Colville Confederated
                                                                                                                       Tribes, Spokane Tribe, and
                                                                                                                       the Yakama Nation would
                                                                                                                       be contacted.

                   Impacts:                                                            Impacts:                      Impacts:                           Impacts:
                   • Construction-related transportation impacts along conveyance      • Same as described for the   • Disruption to nearby             • No impacts to transportation
                     routes would include disruption of nearby businesses, travel        Stockyards Alternative.       businesses and temporary           would occur under the No
                     delays, lane reconfigurations, and/or detours on nearby                                           detours on nearby roadways         Action Alternative.
                     roadways that could increase volumes on alternative                                               that could increase volumes
Transportation       roadways and travel times for some motorists.                                                     on alternate roadways and
                   • Upon operation, treatment plant vehicles and trucks would                                         travel times for some
                     add an additional 52 - 74 trips per day.                                                          motorists during
                                                                                                                       construction.

                   Mitigation:                                                         Mitigation:                   Mitigation:
                   • Develop a traffic control plan to ensure continued vehicular      • Same as described for       • Same as described for
                     access on streets in the project vicinity, including working in     Stockyards Alternative.       Stockyards Alternative.
                     conjunction with emergency service providers;
                   • Flaggers to control and coordinate traffic flow;
                   • Signage to alert drivers to the presence of construction
                     activities.
                   • Traffic cones or barrels to direct traffic away from
                     construction areas and into appropriate travel lanes.




Page 1-14                                                                                                                                                              December 2002
                                                          Spokane County WWTP Final Supplemental EIS




      CHAPTER 2. DESCRIPTION OF ALTERNATIVES
INTRODUCTION
Spokane County proposes to construct a new wastewater treatment plant. The new plant and
associated facilities would provide additional capacity for projected growth in the County and for
increased wastewater flows generated by the County's Septic Tank Elimination Program.

The new treatment plant will provide wastewater treatment for the County's Spokane Valley and
North Valley Spokane Planning Areas. Under an agreement with the City of Spokane, the
County may send up to 10 million gallons of wastewater per day (mgd) to the City of Spokane's
Advanced Wastewater Treatment Plant (SAWTP). The County proposes to construct a new
treatment plant to provide an additional 8 mgd of capacity for the region. Construction is
targeted to start in 2005 with the new 8 mgd treatment plant to be on-line in early 2007. By
approximately 2017, the capacity of the plant would be expanded to treat a total flow of 12 mgd,
which would meet projected requirements through the year 2025. The plant could be further
expanded for an ultimate buildout of 24 mgd of capacity.
SPOKANE COUNTY WASTEWATER TREATMENT PLANT PROGRAM
For purposes of this Supplemental EIS, a basic program for the Spokane County Wastewater
Treatment Plant system was developed in order to evaluate potential environmental impacts of
the proposal. The basic site layout, operations, conveyance system, and construction techniques
described in this section would generally be common to either of the alternatives selected.
However, changes may occur as site-specific design is developed.

Basic Site Layout
Approximately 15 to 20 acres is required for processing and operations for the treatment plant
site at full buildout. For the 24-mgd plant, structures would house approximately 130,000 square
feet of activities. Buildings or at-grade structures would range in size from 450 square feet to
60,000 square feet in 20 to 30 structures. The complex of buildings would be on the scale of a
light industrial or agri-industrial facility. However, the treatment plant buildings and grounds
would be designed and landscaped to be compatible with the existing neighborhood to the extent
practicable.

For security purposes, chain-link fencing topped by barbed wire would encompass the property
boundaries. Some areas may have privacy slats to obscure views. The facility would be lit using
low-level lighting during nighttime hours for security purposes.

Operation
The proposed facility would include facilities to support an 8-mgd treatment capacity in its initial
phase and a 12-mgd treatment capacity in the second phase (2017 to 2018) that would provide
enough capacity to handle flows through 2025. The plant layout would be designed to
accommodate a full buildout capacity of 24-mgd. Facilities would include the following
components:

December 2002                                                                               Page 2-1
Spokane County WWTP Final Supplemental EIS




•   Administration                               •    Chemical feed and storage
•   Laboratory                                   •    UV disinfection
•   Maintenance                                  •    Post aeration
•   Septage receiving                                Gravity thickener
•   Headworks                                    •    Dissolved air thickener
•   Primary clarifiers                           •    Anaerobic digester
•   Primary sludge pumping                       •    Digester control
•   Fine screening                               •    Sludge dewatering
•   Membrane bioreactor, including aeration      •    Dewatered sludge loadout
    basins, membranes, and blower building
•   Odor control system

The proposed treatment plant facility would be designed to incorporate the latest treatment and
odor control technologies. A state-of-the-art treatment technology known as membrane bio-
reactor (MBR) has been selected. The MBR treatment process combines an activated sludge
reactor with a membrane filtration unit to purify wastewater. Compared to conventional
advanced wastewater treatment processes, the MBR process provides a greater margin of
compliance with water quality standards because of its greater capability to remove particulates.
The MBR process also provides effective removal of pathogens because it physically removes
bacteria and cysts, such as Giardia and Cryptosporidium, and the greater clarity of the effluent
enhances the efficiency of the ultraviolet disinfection process. Chemicals such as alum, polymer,
and hypochlorite used in various stages of treatment would be delivered by truck for use in the
operations. Plant components would be covered or enclosed to reduce or eliminate odor. These
buildings would be designed to fit into the surrounding landscape.

To reduce the possibility of a power failure at the plant, the proposed treatment plant would be
provided with two sources of electrical power. The generators would only be used during major
emergencies when the other electrical backup supplies are not available. In addition, emergency
diesel generators may be considered. The generators would be tested monthly and the County
would work with the Spokane County Air Pollution Control authority (SCAPCA) to meet any
emission requirements for testing.

Two new pumping stations would be needed on the existing County sewage interceptors, along
with conveyance force mains to bring the raw wastewater to the new treatment plant. Another
pipeline would be needed to convey the treated effluent to the outfall in the Spokane River. The
pumping stations would require about one-half acre of land to construct a one and a half-story
building of approximately 3,000 square feet of space to house electrical and mechanical
equipment. The pumping stations would be designed to fit into the adjacent neighborhood
architecture to the maximum extent possible. Operations and maintenance staff typically visit
the pump stations 5 days per week. Each pump station would also be monitored electronically,
and would have telemetry alarms for any malfunctions, 24 hours per day. Each pump station
would include odor control equipment, and an engine generator for stand-by power. Routine
maintenance is done on the equipment, pumps, motors, generator, wet-wells, and other
components of the pumping station.



Page 2-2                                                                           December 2002
                                                         Spokane County WWTP Final Supplemental EIS


The outfall pipe would be buried along the river bank and extend into the river approximately 8
to 10 feet below water level at low water (Limno-Tech, 2002a). The outfall would be a 48-inch
diameter pipe of concrete, concrete cylinder or steel pipe with a single port. To minimize scour
on the opposite bank of the river, the port would be oriented to point slightly downstream (about
30 degrees from perpendicular). The outlet of the outfall would be covered with an orifice plate
with a 36-inch diameter opening. The opening would be configured to minimize the buildup of
sediment in the outfall. The outfall would be constructed in accordance with the Department of
Ecology's Criteria for Sewer Works Design. Maintenance on the conveyance pipes and outfall
pipes would be done on a systematic schedule. Typically cleaning and inspection of these sizes
of pipes are done after 10 years or more of service.

The plan for biosolids is to produce a Class B biosolids using mesophilic anaerobic digestion.
The digested biosolids would be dewatered to produce a cake with a solids content of about
25 percent. The dewatered cake would be loaded into large dump trucks for haul to either farms
or reclaimed mining sites. It is anticipated that sufficient property for land application of the
biosolids can be found within a 25-mile radius of the treatment plant. The dewatered biosolids
would be unloaded at the application sites and then spread across the fields and disked into the
soil using common farm equipment. During the winter, when the soil is frozen, the biosolids
would be stockpiled on the farm site for later spreading and tilling in the spring, much the way
manure is handled. In Phase 1 (8 mgd capacity), approximately 80 biosolid truck trips per month
(round trips) are anticipated. In Phase 2 (12 mgd capacity), approximately 110 truck trips per
month (round trips) are anticipated.

At some future date, the County may elect to produce a Class A biosolids. This material is
further treated to achieve even greater pathogen reduction and a more stabilized material than
Class B biosolids. This could be achieved by adding high-temperature pretreatment facilities
ahead of the mesophilic digesters at the Spokane County plant site or by composting the
dewatered Class B biosolids. If composting were to take place, it would be located at a remote
site.

Further information on Class B and Class A biosolids may be found in the biosolids alternatives
chapter in the Facilities Plan.
Staffing
Based on preliminary estimates of operations and maintenance requirements, the number of on-
site staff is estimated to be approximately 9 to 10 12 full time equivalent employees (FTE) for
the first phase of operation (8 mgd capacity) and 12 to 13 approximately 16 FTE at the
completion of Phase 2 (12 mgd capacity). Staffing estimates include operators, maintenance
personnel, laboratory analysts and supervisors. The treatment plant would be staffed 8 10 hours
per day, seven days per week, with reduced staff levels (approximately 2 FTE) on weekends.
Construction
Construction is anticipated to begin in 2004 with the facilities operational in early 2007.
Preliminary site work and removal of existing structures may occur earlier. It is anticipated that
separate contracts would be issued for the treatment plant, the pumping stations, and the
pipelines. The treatment plant and pumping station sites would be fenced with temporary chain
link fencing for security purposes during construction. Orange plastic construction fencing may
also be used to secure open trench areas during pipeline construction. All construction activities
December 2002                                                                              Page 2-3
Spokane County WWTP Final Supplemental EIS


are anticipated to occur during the allowable construction hours of 6:00 a.m. until 10:00 p.m.,
with typical work shifts of 8 to 10 hours.

The majority of conveyance pipelines would be constructed using open trench construction in
block-by-block segments taking 2 to 3 weeks per segment. The depth of the trench will be up to
30 feet deep at the sewage interceptor, and will average about 10 to 12 feet deep. The trench
width at the surface will be approximately 30 feet on average. In this construction method, the
trench is dug to the required depth, bedding is placed for the pipe, then pipe segments are joined
together, and the trench is backfilled to the surface with compacted soils. The force main
pipeline for effluent going to the treatment plant would be constructed of 48-inch diameter by
18- to 20-foot ductile iron pipe segments while the outfall conveyance pipeline would be
constructed of approximately 48-inch diameter by 18- to 20-foot concrete pipe segments. Major
crossings of railroads and arterial roads may be done by jacking a casing, or directional boring
rather than using the open trench method.

Placement of the outfall would require diversion of the river. This diversion would comply with
the Washington Department of Fish and Wildlife's Hydraulic Project Approval (HPA) and Corps
of Engineer requirements. It is anticipated that a temporary sheet pile cofferdam would be
constructed along the bank of the river and extend about 50 feet from the river's edge. The
cofferdam would be removed following construction. Water within the cofferdam would be
pumped out to create a dry work area. The trench for the pipe would be created using open cut
excavation. The trench will be backfilled and the stream bank shape will be restored. A rock
armor plate would be constructed over the outfall to protect the pipe from erosion. Construction
of the in-bank portion of the outfall is expected to take 4 to 5 weeks and would likely occur
during the summer low flow period.

Most construction activities are anticipated to occur during daytime hours. Some nighttime work
may occur at pump station locations when tying into the interceptors to take advantage of the low
nighttime sewage flows.
SUMMARY OF COST-EFFECTIVENESS ANALYSIS
Spokane County intends to apply for State Revolving Funds (SRF) to finance a portion of the
construction of the proposed wastewater treatment facilities. As part of the application process
for these funds, the County must comply with the State Environmental Review Process (SERP)
(Chapter 173-98-100 WAC). This summary cost-effectiveness analysis is provided to comply
with SERP requirements Chapter 173-98-100(3) WAC). A draft of a more detailed cost-
effectiveness analysis is available for review on the County’s website at
http://www.spokanecounty.org/utilities/. The final version will be contained in Chapter 9 of the
Wastewater Facilities Plan Amendment.

Spokane County examined both monetary and non-monetary costs throughout their decision
making process in planning for future regional wastewater service needs. The programmatic
wastewater management plan included a cost analysis for demand management, effluent end use
management, and biosolids management alternatives, as well as an analysis of treatment location
and capacity. These are described in chapters 4, 5, 7, and 6, respectively, of the Wastewater
Facilities Plan (Spokane County, 2001b). In addition to an analysis of monetary costs for the
different alternatives and options, several non-monetary costs and benefits were also evaluated,

Page 2-4                                                                             December 2002
                                                          Spokane County WWTP Final Supplemental EIS


including technical complexity, environmental impacts, implementability, water resources, and
community values.

From the programmatic analysis of treatment locations, the County decided to move forward
with construction of a new wastewater treatment plant in the Spokane Valley. Treatment
technologies were also investigated. A value engineering (VE) study was conducted on the
treatment technologies examining both capital and operating costs. In consideration of a number
of non-monetary factors, such as water quality, water resources, and regulatory approvals, a
membrane bioreactor with nitrification/denitrification and primary clarifiers was selected as the
preferred treatment technology for the regional treatment plant,

Selection of the treatment plant site alternatives evaluated in this Supplemental EIS also involved
both monetary and non-monetary cost considerations. Originally 15 sites were identified. These
were screened to ten using a fatal flaw evaluation. The remaining 10 sites were numerically
ranked against evaluation criteria. Five sites were selected for more detailed assessment using
evaluation criteria that included environmental impacts, technical complexity, implementability,
regulatory considerations, and community issues such as compatibility with adjacent land uses.
The detailed evaluation resulted in the selection of two alternative sites for evaluation in the
Supplemental EIS—the Stockyards Alternative and the Alki/Fancher Alternative. A cost
comparison of the two alternatives was prepared and is summarized in Table 9-6 of the draft
Wastewater Facilities Plan Amendment. The cost comparison was conducted at a planning level
and will likely change when detailed designs and cost estimates are prepared. Table 9-6
identifies only the major costs associated with constructing and operating a wastewater treatment
plant at each of the two sites.

Monetary Costs
Construction and operation costs of the treatment plant are assumed to be equal at the two sites,
however the overall cost of the Alki/Fancher site is estimated to be approximately 7 percent
more than the Stockyards site. The major factors increasing costs for the Alki/Fancher site are
property acquisition because the site houses an active business and likely contamination
remediation. The capital costs for construction and operation of either of the two outfall
locations would be higher for the Springfield Avenue location because the conveyance routes
would be longer from either plant site than for the Rebecca Street option. In addition, the
Springfield Avenue route is all on paved streets that would require repaving. The Rebecca Street
route lies mainly along unpaved right-of-way.

Non-Monetary Costs
Non-monetary costs and benefits of the two sites were also compared in the site selection
process. In the overall ranking system that include technical and economic, environmental, and
community criteria, the Stockyards site considerably outranked the Alki/Fancher site and the
other three sites considered in the detailed evaluation. The evaluation rated the two sites equally
for environmental criteria, including impacts to threatened and endangered species, wetlands,
surface water, and historic and archaeological resources. Both sites provide adequate protection
for groundwater and potable water supplies and appeared to have minimal environmental
permitting concerns. The Rebecca Street outfall location has a slightly higher risk factor of
introducing pollutants into the Spokane Aquifer than the Springfield outfall location. The

December 2002                                                                               Page 2-5
Spokane County WWTP Final Supplemental EIS


contamination potential, however, can be eliminated through monitoring and treatment of the
water supply if needed. Both sites have equal opportunities for the reuse of treated effluent.

Additional analysis provided through this EIS process indicates that the Alki/Fancher site has a
higher potential for site contamination and related clean up than the Stockyards site. The
Stockyards site was determined to be more compatible with the surrounding neighborhood. The
Alki/Fancher site would require displacement of an existing business and would be in close
proximity to retail stores. Consequently, land use permitting and zoning concerns were
considered higher for the Alki/Fancher site. Conveyance routes would be longer for the
Alki/Fancher site and therefore the potential for disruptions associated with outfall conveyance
construction is higher for the Alki/Fancher site. The Rebecca Street outfall is located in a less
developed neighborhood, therefore, there would be fewer impacts to businesses and residents.

The costs associated with the No Action Alternative are not easy to quantify. These costs include
the environmental impacts to air quality; water quality violations and accompanying fines; and
potential for aquifer contamination resulting from discontinuation of the septic tank elimination
program. Economic impacts to the region could also result from a building moratorium that
could be imposed when existing treatment plant capacity is exceeded.

In summary, Spokane County considered a wide range of monetary and non-monetary costs
throughout its selection process for the wastewater treatment plant. The cost analysis indicates
that the monetary costs would be lower for the Stockyards site. In addition, the Stockyards site
would have fewer non-monetary costs because it is more compatible with existing land uses.

DESCRIPTION OF ALTERNATIVES
Spokane County is considering two alternatives in this Draft Supplemental EIS – the Stockyards
Alternative and the Alki/Fancher Alternative, in addition to a No Action Alternative (see
Figure 2-1). The County has identified the Stockyards Alternative as its Preferred Alternative.

Each action alternative has several components which make up its system: site of the wastewater
treatment plant; inflow and outflow conveyance lines; pump stations; and outfalls. Within this
Supplemental EIS, discussion of the wastewater treatment plant site and inflow and outflow
conveyance routes will be discussed under each alternative. Two outfalls are presented as
options to complete the system. The preferred location for the outfall from either site alternative
is at Rebecca Street, on the south bank of the Spokane River. However, an alternative location
near Springfield Avenue on the southeast bank of the Spokane River is also being evaluated.
The final selection of the outfall location will be determined based on resolution of water quality
issues in both groundwater and surface waters.




Page 2-6                                                                              December 2002
                                                  N REBECCA STREET




      STOCKYARD
      ALTERNATIVE


                                                                                            FANCHER ROAD

E SPRINGFIELD AVE
                                                                       ALKI/FANCHER
                                                                       ALTERNATIVE
                                         N FREYA STREET
                                                                                         ALKI AVENUE




                                                                                                 FIGURE 2-1.
                                            File name: 20062_site.ai
                           NORTH            Original graphic by: ACT
                           No Scale         Edits by:
                                            Date: 08/01/02
                                                                                         SITE LOCATION MAP
                                                                                  SPOKANE COUNTY REGIONAL
                     Source: U.S.G.S Topographic Map; Spokane NE,              WASTEWATER TREATMENT PLANT
                    Washington quadrangle; 1973 (Photorevised 1986).
                                                                                      SPOKANE, WASHINGTON
                                                    STOCKYARDS
                                                    ALTERNATIVE




               File name: 20062_stockyard_alt.ai
               Original Graphic by: ACT                                                     FIGURE 2-2.
NORTH          Edits by:
               Date: 9/5/02                                                    STOCKYARDS ALTERNATIVE
                                                   SPOKANE COUNTY REGIONAL WASTEWATER TREATMENT PLANT
        Source: HDR, Inc.
                                                                                 SPOKANE, WASHINGTON
                                                           Spokane County WWTP Final Supplemental EIS



Stockyards Alternative
The proposed Stockyards Site encompasses approximately 17.8 acres of currently vacant
property in the eastern industrial area of the City of Spokane (Figures 2-1 and 2-2). The site is
bounded by industrial and industrial/commercial businesses on the east, the Northern Pacific
Railroad to the south, and North Freya Way/North Freya Street to the west. This location
previously contained the Union Stockyards that were active for nearly 100 years before their
closing in 1999.

The site is in a heavy industrial area, highly visible from elevated Freya Street, a major arterial in
the City. All odor generating operations would be covered or enclosed in buildings. These
structures would be designed with an agri-industrial or similar light industrial warehouse/
distribution theme.

Ingress and egress to the site for employees, visitors, and community access to administration
and laboratory facilities would be at the northwest corner of the site from North Freya Street,
subject to approval from the City of Spokane. Ingress and egress for biosolids trucks, septage
haulers, chemical and supply deliveries, and other large vehicles would be from North Julia
Street and East Boone Avenue. Construction access would generally be from East Boone
Avenue and North Julia Street.

Demolition of a large expanse of concrete pavement, excavation and regrading would be
necessary to accommodate the new treatment facility. Approximately 90,000 cubic yards of
material would be taken off site and approximately 60,000 cubic yards of new material would be
imported.

The inflow conveyance system for the Stockyards Alternative is shown on Figure 2-3 and is
described as follows:

   1) East Trent Avenue Route. This route would begin at a proposed new North Valley
      Interceptor (NVI) pump station near the vicinity of East Utah Avenue and North Eastern
      Road. The Route then traverses street right-of-way in a southwesterly direction until it
      reaches the Stockyards Site. This route is approximately 2.5 miles long.
   2) Julia Street Route. This route is an optional route to the East Trent Avenue route to bring
      effluent from the northeastern part of the service area to the Stockyards Site. The route
      would begin at a new pump station located at the north end of Rebecca Street on the
      south side of the Spokane River bank and follow Rebecca Street south until it intersects
      with East Mission. The route then turns easterly on Mission until intersecting with Julia
      Street and follows Julia south to the Stockyards Site. This option is approximately
      0.7 miles long.
   3) Havana Street Route. This route would bring flows from the southeastern service area to
      the Stockyards Site. It would begin at a new pump station located in the vicinity of the
      I-90 on-ramps near East Second or Third Avenues. The route would follow Havana
      north till it intersects with East Boone Street and the Stockyards Site. This route is
      approximately 1.4 miles long.



December 2002                                                                                 Page 2-9
Spokane County WWTP Final Supplemental EIS


The outfall conveyance system (Figure 2-3) would be selected from one of the following options,
depending on the ultimate location of the outfall:

   1) Rebecca Street Option. This would be a separate outfall pipe but would be installed in
      the same street right-of-way route as the Julia Street inflow conveyance option. This
      option is approximately 0.7 miles long.

   2) Springfield Avenue Option. This route heads directly west from the Stockyards Site at
      Desmet Avenue and progresses southwesterly along East Trent Avenue until it intersects
      with Springfield Avenue, where it continues directly west to the Spokane River. This
      option is approximately 1.9 miles long.

Alki/Fancher Alternative
The proposed Alki/Fancher Site is an approximately 37.5 acre parcel located in an
industrial/commercial area within the newly incorporated City of Spokane Valley, immediately
east of the existing city limits of Spokane (Figures 2-1 and 2-4). The site is largely an interior
parcel with small east and north frontages on Fancher Road and Alki Avenue, respectively. It is
currently being used as a rail transfer facility for automobiles and trucks (Union Pacific Railroad
Automobile Distribution Center). The site is bounded by vacant property and industrial/
commercial businesses on the north, retail/commercial businesses on the east, a busy retail
shopping area separated from the site by railroad tracks on the south, and an abandoned gravel
pit on the west.

To accommodate a phased relocation of the Automobile Distribution Center, facilities required
for the initial 8 mgd of capacity would be located on the northern portion of the site in Phase I.
Subsequent expansion would occur to the south. All odor-generating operations would be
covered or enclosed in buildings. With the site being in a light industrial/commercial area, the
structures would be designed with a compatible theme.

Ingress and egress to and from the site would occur from East Alki Avenue west of North
Fancher Road, and at Maine Avenue and North Fancher Road. During construction the same
access points would be used by trucks and construction equipment.

Demolition of a large expanse of asphalt paving, excavation and regrading would be necessary to
accommodate the new treatment facility. Approximately 100,000 cubic yards of material would
be taken off site and approximately 60,000 cubic yards of new material would be imported.

The inflow conveyance routes for the Alki/Fancher Alternative are shown on Figure 2-5 and
described below:

   1) Fancher Road Route. This route would bring effluent from the northeastern service area
      beginning at a new proposed North Valley Interceptor pump station near the vicinity of
      East Utah Avenue and North Eastern Road. The route then heads west to Fancher Road
      where it progresses south to the project site. The route is approximately 2.1 miles long.




Page 2-10                                                                             December 2002
                                                                           Stockyards Inflow




                                                                                                                                                Market St
                                                                                                                       Euclid Av


                                                                                                                                                                       E Trent Av Route

                                                                                                                                                                       Upriver Dr                       Trent Av
                                                                                                                           N Julia St Route
                                                                                                                               Option




                                                                                                                                                                                                                                                                 Vista Rd




                                                                                                                                                                                                                                                                            Argonne Rd
                                                                                                                 Mission Av
                                                                                      Hamilton St




                                                                                                                                                                                                    Francher Rd
                                                                                                                               Napa St




                                                                                                                                                                                                                                          Park Rd
                                                                                                                                                                                                                                                      Broadway Av




                                                                                                                                                                             Havana St




                                                                                                                                                                                                                   Therman St
                                                                                                        Trent Av
                                                                                                                                                            Freya St


                                                                                                                                                                                                                                    S[rague Av
                                                                                                               Helena St




                                                                                                                                                                                                                            4th Av                  NVI Flow
                                                                                                                                                                                                                                                     SVI Flow
                                                                                                                                         N Havana St Route                                                                 8th AV
                                                                                                                                                                                                                                                    Pump Stations
                                                                                                                                                                                                                                                    Stockyards Outfall Route
                                                                                                                                                                                                                                                    Outfall Options

                                                                                                                                                                                                                                                    Stockyards Site
                                                                           Stockyards Outfall
                                                                                                                                                                                                                                                    Railroad
                                                                                                                                                                                                                                                    Arterials
                                                                                                                                                Market St




                                                                                                                                             Rebecca St Outfall                                                                                     Spokane River

                                                                                                                           Euclid Av
                                                                                                                                                  Option                                                                                            City of Spokane

                                                                                                                                                                                                                                                    City of Spokane Valley


                                                                                                                                                                                         N Rebecca St Route
                                                                                                                                                                        Upriver Dr                  Trent Av

                                                                                                                                                                                                                                                                Vista Rd




                                                                                                                                                                                                                                                                             Argonne Rd
                                                                                                                       Mission Av
1:51000 scale




                                                                                                                             Napa St
                                                                                    Hamilton St




                                                                                                                                                                                                   Fancher Rd




                                                                                                                                                                                                                                                      Broadway Av
                                                                                                                                                                                                                                          Park Rd
L:\ENVIR IMPACTS\2000 projects\20062 SPK Co WW Plan\gis\convey_stock.mxd




                                                                                                                                                                             Havana St




                                                                                                                                                                                                                   Therman St




                                                                                                         Trent Av
                                                                                                                                                            Freya St




                                                                                                                                                                                                                                         Sprague Av
                                                                                                               Helena St




                                                                                                                                                                                                                                4th Av

                                                                                                                                         E Springfield Av Route                                                                 8th Av
                                                                           Springfield Av Outfall
                                                                                  Option

                                                                                                    Map data shown are the property of the                                                                                     FIGURE 2-3
                                                                                                    sources listed below. Inaccuracies may
                                                                                                    exist, and Adolfson Associates, Inc. implies                                                             Stockyards Conveyance Routes
                                                                                                    no warranties or guarantees regarding any
                                                                                                    aspect of data depiction.                                                            Spokane County Regional Wastewater Treatment Plant
                                                                                                                                                            0              0.5            1                           Spokane County, WA
                                                                                               Source: Spokane County GIS, 2002                                                            Miles
                                              ALKI/FANCHER
                                              ALTERNATIVE




               File name: 20062_alki_alt.ai
               Original Graphic by: ACT                                                    FIGURE 2-4.
NORTH          Edits by:
               Date: 9/5/02                                                  ALKI/FANCHER ALTERNATIVE
                                                 SPOKANE COUNTY REGIONAL WASTEWATER TREATMENT PLANT
        Source: HDR, Inc.
                                                                                SPOKANE, WASHINGTON
                                                                          Alki Fancher Inflow




                                                                                                                                          Market St
                                                                                                                 Euclid Av




                                                                                                                                                                      Upriver Dr                       Trent Av




                                                                                                                                                                                                                                                         Vista Rd
                                                                                                                                                                                                                  N Fancher Road Route




                                                                                                                                                                                                                                                                       Argonne Rd
                                                                                                            Mission Av
                                                                                      Hamilton St




                                                                                                                                                                                                   Francher Rd
                                                                                                                         Napa St




                                                                                                                                                                            Havana St




                                                                                                                                                                                                                                         Park Rd
                                                                                                                                                                                                                  Therman St
                                                                                                                                                                                                                                                    Broadway Av



                                                                                                    Trent Av
                                                                                                                                                          Freya St                                                                 S[rague Av
                                                                                                         Helena St




                                                                                                                                                                                                                               4th Av
                                                                                                                                   Fairgrounds Route                                                                                                 NVI Flow
                                                                                                                                                                                                                           8th AV
                                                                                                                                                                                                                                                     SVI Flow
                                                                                                                                                                                                                                                     Pump Stations
                                                                                                                                                                                                                                                     Alki Outfall Route
                                                                                                                                                                                                                                                    Outfall Options

                                                                                                                                                                                                                                                     Alki Fancher Site
                                                                          Alki Fancher Outfall
                                                                                                                                                                                                                                                     Railroad
                                                                                                                                                                                                                                                     Arterials
                                                                                                                                                                                                                                                     Spokane River
                                                                                                                                        Market St




                                                                                                                                                                                                                                                     City of Spokane
                                                                                                                     Euclid Av
                                                                                                                                      Rebecca St Outfall                                                                                             City of Spokane Valley
                                                                                                                                           Option

                                                                                                                                                                                        N Havana St Route
                                                                                                                                                                     Upriver Dr


                                                                                                                                                                                                                                                        Vista Rd
                                                                                                                                                                                                   Trent Av




                                                                                                                                                                                                                                                                        Argonne Rd
                                                                                                                 Mission Av
1:51000 scale




                                                                                                                       Napa St
                                                                                     Hamilton St




                                                                                                                                                                                                  Fancher Rd




                                                                                                                                                                                                                                         Park Rd




                                                                                                                                                                                                                                                   Broadway Av
                                                                                                                                                                                                                  Therman St
                                                                                                                                                                            Havana St
L:\ENVIR IMPACTS\2000 projects\20062 SPK Co WW Plan\gis\convey_alki.mxd




                                                                                                    Trent Av
                                                                                                                                                          Freya St




                                                                                                                                                                                                                                        Sprague Av
                                                                                                         Helena St




                                                                                                                                                                                                                               4th Av
                                                                                                                                                                       E Broadway Av Route
                                                                          Springfield Av Outfall                                                                                                                               8th Av
                                                                                 Option


                                                                                       Map data shown are the property of the                                                                                                 FIGURE 2-5
                                                                                       sources listed below. Inaccuracies may
                                                                                       exist, and Adolfson Associates, Inc. implies                                                                        Alki Fancher Conveyance Routes
                                                                                       no warranties or guarantees regarding any
                                                                                       aspect of data depiction.                                                                        Spokane County Regional Wastewater Treatment Plant
                                                                                                                                                      0                   0.5           1                             Spokane County, WA
                                                                                      Source: Spokane County GIS, 2002                                                                   Miles
Spokane County WWTP Final Supplemental EIS


THIS PAGE INTENTIONALLY LEFT BLANK.




Page 2-14                                    December 2002
                                                         Spokane County WWTP Final Supplemental EIS


   2) Fairgrounds (or Havana) Route. This route would bring flows from the southeastern
      service area to the Alki/Fancher Site. It would begin at a new pump station located in the
      vicinity of the I-90 on-ramps near East Second or Third Avenues. The route would
      follow Havana north until it reaches the vicinity of East Main Street, where it would then
      turn east at the southern boundary of the Fairgrounds and proceed east to the project site.
      This route is approximately 1.2 miles in length.

The outfall conveyance system as shown on Figure 2-5 would be selected from one of the
following options, depending on the ultimate location of the outfall:

   1) Rebecca Street Option. This effluent line would leave the most northwestern portion of
      the Alki/Fancher Site head north until it reached Broadway Avenue (at about East
      Cashman Road) and turn west on Broadway until its intersection with Havana Street.
      The route would then progress north on Havana until it reached Mission Avenue where it
      would head west until it reached Rebecca Street. Once on Rebecca, the route would head
      north where it would terminate at the Rebecca Street Outfall. The route is approximately
      2.2 miles long.

   2) Broadway Avenue Option. This route would leave the Alki/Fancher site as described for
      the Rebecca Street Option, but instead of progressing north along Havana Street, it would
      continue to proceed west along the Broadway Avenue/Springfield Avenue rights-of-way
      until it terminates at the proposed Springfield Avenue Outfall. The route is
      approximately 3.1 miles long.

Outfall Options
The Stockyards Alternative and the Alki/Fancher Alternative will each include an outfall to
complete its system. One of two options will be selected, largely determined by the resolution of
water quality issues.

   1) The Rebecca Street Outfall, the County's preferred option, would be located along the
      bank of the Spokane River at a location approximately at the intersection of North
      Rebecca Street and East Ermina Avenue (Figure 2-5). This outfall location lies within
      the city limits of the City of Spokane and would require a shorter distance of piping to
      transport effluent than the Springfield Avenue Outfall option.

   2) The Springfield Avenue Outfall would be located along the banks of the Spokane River
      at the location of an abandoned industrial property at the terminus of East Springfield
      Avenue on the east side of the river (Figure 2-5). This outfall location lies within the city
      limits of the City of Spokane and would require a greater distance of piping to transport
      effluent than the Rebecca Street Outfall option.

Biosolids Management
The plan for biosolids is similar for both proposed sites. A Class B biosolid would be produced
using mesophilic anaerobic digestion. The digested biosolids would be dewatered to produce a
cake with a solids content of about 25 percent. The dewatered cake would be loaded into trucks
(basically large dump trucks) for haul to either farms or reclaimed mining sites. In Phase 1 (with

December 2002                                                                             Page 2-15
Spokane County WWTP Final Supplemental EIS


the 8 mgd capacity plant), approximately 80 biosolid truck trips per month (round trips) are
anticipated. In Phase 2 (12 mgd capacity), approximately 110 truck trips per month (round trips)
are anticipated. Trucks would generally use major arterials to access I-90 for travel to remote
application sites.

No Action Alternative
Under the No Action Alternative, the existing Spokane Area Wastewater Treatment Plant
(SAWTP) would continue to treat the County's wastewater. The County would exceed its
allocated capacity in approximately 2007 under this alternative.
ALTERNATIVES CONSIDERED BUT NOT SELECTED
Beginning in May 2001, Spokane County solicited suggestions from the public on possible
wastewater treatment plant sites. Suggestions for possible sites were solicited at public meetings
in May 2001, through the November 2001 project newsletter, and through newspaper ads in
March 2002. The suggested sites, along with property searches conducted by Spokane County,
resulted in 15 possible treatment plant sites. Data were gathered on these 15 sites. An initial
fatal-flaw evaluation of major constraints was conducted which resulted in five sites being
eliminated from further consideration.

The remaining 10 sites were rated based on 20 technical, economic, environmental, and
community criteria. This preliminary evaluation resulted in five short-listed sites recommended
for further detailed evaluation:

   •   Stockyards
   •   Playfair Race Track
   •   Spokane Industrial Park
   •   Alki/Fancher Road, and
   •   Trentwood (Inland Empire Paper Parcel).

These five sites were presented at an EIS scoping meeting on May 1, 2002. Following the
receipt of scoping comments a more detailed evaluation was conducted. The evaluation
included: 1) additional site specific data collection; 2) review of 20 site selection criteria;
3) suitability of the sites’ area and shape for treatment process flow; 4) property cost research;
5) cost estimates associated with getting wastewater to the site and to the discharge locations;
and 6) consideration of community comments and concerns. Based on this evaluation, the five
sites were narrowed to the two site alternatives being considered in this Supplemental EIS. A
detailed report on the treatment plant site selection process is available upon request.




Page 2-16                                                                             December 2002
                                                         Spokane County WWTP Final Supplemental EIS




          CHAPTER 3. IMPACTS OF ALTERNATIVES
                    AND MITIGATION

                                    AIR QUALITY
This section discusses the current air quality conditions in the City of Spokane and Spokane
County area east of the city limits between the Spokane River and Interstate 90. Applicable state
and local regulations are summarized. Impacts to air quality associated with a new treatment
plant facility are discussed and mitigation measures are identified.
AFFECTED ENVIRONMENT
Over the past 25 years, air quality in the City of Spokane has improved substantially from the
heavily polluted situation in the 1970s. However, air quality problems persist and are aggravated
by the weather and topography in the Spokane area (Spokane County Air Pollution Control
Agency (SCAPCA, 2002a). Carbon monoxide (CO) is the biggest contributor to Spokane's air
quality problems. Carbon monoxide generally occurs in highest concentrations during the colder
winter months. The majority of Spokane's carbon monoxide comes from motor vehicles (54
percent). Other CO sources include industrial emissions, wood stoves, and other smaller
combustion sources (SCAPCA, 2002a). Particulate matter (PM10 and PM2.5) and ozone (O3) are
also pollutants of concern for the Spokane area. Particulate matter is made up of small particles
of smoke, dust, fly ash, and condensing vapors that can remain suspended in the air for long
periods of time. Sources of particulate matter include wood smoke, dust, motor vehicles, and
outdoor burning. PM10 and PM2.5 are pollutants of concern because their small size allows a
person to inhale them deeply into their lungs, potentially leading to respiratory problems or
disease, such as various forms of cancer. Ozone is formed in the lower atmosphere as a result of
chemical reactions between oxygen, nitrogen oxides, and volatile organic compounds in the
presence of sunlight. Most ozone pollution occurs in late spring, summer, and early fall. Most
of the pollutants that contribute to ozone formation come from motor vehicles. Other sources of
pollutants contributing to ozone formation include gasoline stations, dry cleaners, autobody paint
shops, cleaning of mechanical and electronic parts, outdoor burning, and house painting
(SCAPCA, 2002a).

Spokane is currently classified as a serious nonattainment area for carbon monoxide and a
moderate nonattainment area for fine particulate matter (PM2.5) (SCAPCA, 2002a) because the
levels of these pollutants have exceeded the maximum allowable thresholds for clean air.
According to the Department of Ecology's 1999 Air Quality Trends in Washington, the trend for
carbon monoxide and fine particulate matter observations in the Spokane area has been on a
steady decline (Ecology, 1999). According to SCAPCA's Air Quality Index information,
Spokane County has not exceeded federal air quality standards for calendar year 2002 (as of
June 30th) and exceeded federal air quality standards only once in calendar year 2001
(SCAPCA, 2002b). There were only two days in 2001 when the air quality within Spokane
County was rated as ”Unhealthy for Sensitive Groups” due to PM2.5 levels, even though federal
standards were not exceeded. For calendar year 2000, only 2 days were rated as "Unhealthy for



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Spokane County WWTP Final Supplemental EIS


Sensitive Groups" and No Unhealthy, Very Unhealthy, or Hazardous days were reported
(SCAPCA, 2002b).

Relevant Local and State Air Quality Standards and Guidelines
Spokane County Air Pollution Control Authority (SCAPCA) has implemented an air quality
maintenance plan to have the area redesignated from nonattainment to attainment status
(SCAPCA, 2002a). SCAPCA Regulations I and II would also apply to the new Spokane County
Wastewater Treatment Plant project. Regulation I is intended to maintain air quality that
protects human health and safety, complies with the federal Clean Air Act, and prevents injury to
plant and animal life and to property, fosters the comfort and convenience of its inhabitants,
promotes the economic and social development of the County and facilitates the enjoyment of
the natural attractions of the County (1969, revised 1994). Specifically, Regulation I, Article VI,
Emissions Prohibited, Section 6.04 Odors and Nuisances would apply to the proposed project.
Section 6.04 calls for the installation and operation of effective odor control apparatus and
measures to reduce odor-bearing gases and particulate matter emitted into the atmosphere to a
reasonable minimum and allows for the Board of Control Officer to establish "reasonable
requirements" that buildings be closed and ventilated to allow for treatment and removal or
destruction of odorous matter or other air contaminants before emission to the atmosphere.
Regulation II has a similar mandate but is also intended to promote the economic and industrial
development of the County and enhance the recreational potential within the County (1971,
revised 1975).

Spokane County has included air quality as a component of the Natural Environment chapter of
its Comprehensive Plan. This document sets goals and policies that are designed to maintain or
improve visibility and air quality in Spokane County (Spokane County, 2000). The City of
Spokane has also included air quality as a component of the Natural Environment chapter of its
Comprehensive Plan (City of Spokane, 2001a). In addition, the City of Spokane has developed a
Carbon Monoxide Nonattainment Area Implementation Plan as outlined in the City's Municipal
Code (SMC 15.02).

Prevailing winds in the Spokane area are from the southwest in both winter and summer. About
20 percent of the time winds are from the northeast in winter (Kimerling and Jackson, 1985).

Stockyards Alternative
Project Site
The Stockyards site is currently vacant and contains remnants of the former stockyards buildings
and holding areas, with a large portion of the site covered in concrete and the remainder in
weedy vegetation. No odor- or air pollutant-producing activities are currently occurring on the
site. The east portion of the site contains stockpiled topsoil for use by a landscaping business
currently leasing the site. During high winds, some of this topsoil could be blown toward
businesses or adjacent roadways, but is not likely to be a major source of dust in the area.

The Stockyards site is located adjacent to North Freya Street on its west boundary. Cars and
trucks using this busy arterial contribute to pollution and odors in the project vicinity. In
addition, railroad engines that use the railroad tracks along the south boundary of the site further
contribute to air pollutants and odors in the area. None of the adjacent businesses were identified

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                                                          Spokane County WWTP Final Supplemental EIS


as sources of air pollutants or odors during site visits, however, employee vehicles and delivery
and/or product transport trucks contribute to air pollutants and odors in the project vicinity.

Inflow Conveyance
Wastewater inflow would be conveyed to the new wastewater treatment plant from pump
stations both north and south of the treatment plant (Figure 2-3). The Trent Avenue inflow route
would initiate at a new North Valley Interceptor Pump Station located at approximately East
Utah Avenue and North Eastern Road. The route then traverses street right-of-way in a
southwesterly direction until it reaches the treatment plant. The pump station would be located
in an area with single-family residences to the south, east, and west, and railroad tracks and Felts
Field Municipal Airport to the north. The mid- and westernmost portions of the route are located
in a primarily industrial/commercial area. The main source of existing odors and air pollutants
along this route are vehicles, including large trucks. Dust is created by wind or activity on
unpaved and gravel areas or roadways. Air quality in the residential portion of this route is
generally better than in the industrial/commercial portion because of the lack of heavy traffic and
manufacturing-related emissions.

The alternate Julia Street route would begin at a new pump station located approximately where
Rebecca Street intersects the Spokane River on the south side. This route is entirely through an
industrial/commercial area, except near the Rebecca Street outfall located adjacent to Spokane
Community College. The main source of existing odors and air pollutants along this route are
vehicles, including large trucks. Dust is created by wind or activity on unpaved and gravel areas
or roadways.

The Havana Street route, from a new South Valley Interceptor Pump Station, would be located at
approximately Interstate 90 and East 2nd Avenue or East 3rd Avenue. This route would also
traverse roadways entirely within an industrial/commercial area. The main source of existing
odors and air pollutants along this route are vehicles, including large trucks. Dust is created by
wind or activity on unpaved and gravel areas or roadways.

Outfall Conveyance
The Stockyards Outfall Conveyance route options both traverse areas that are primarily
industrial/commercial in nature. The Rebecca Street option, that heads mainly north and
terminates at the Rebecca Street Outfall (see Figure 2-3 for a map of the route), does not abut
any residential areas or sensitive uses. Spokane Community College (SCC) athletic facilities and
a logger skills arena are located along Rebecca Street at the northernmost portion of the route.
The Springfield Avenue option, heads westerly from the Stockyards site, traverses mainly
industrial areas along the east half, and a mix of industrial, commercial, and residential areas
along the west half. Single-family homes are located along approximately the westernmost four
blocks of this route. The main source of existing odors or air pollutants along these routes would
be from vehicles, including large trucks, using the area roadways. Dust is created by wind or
activity on unpaved and gravel areas or roadways.
Alki/Fancher Alternative
Project Site
The Alki/Fancher site is currently almost entirely paved. The site is being used as an automobile
transfer area where railroad cars deliver automobiles that are later transferred to semi-trucks for

December 2002                                                                               Page 3-3
Spokane County WWTP Final Supplemental EIS


transport to dealerships or other receiving businesses. A small portion of the site along the south
boundary is currently vacant and covered in weedy vegetation. Dust is created by activity on
unpaved or gravel areas on and near the site. Vehicle and other equipment exhaust is generated
during automobile transfer operations. Large propane tanks are present in a fenced area along
the southwest portion of the property. These tanks are currently used to store propane for
distribution.

The Alki/Fancher site is located adjacent to North Fancher Road, a busy arterial, on its east
boundary. Cars and trucks using this roadway are a source of air pollutants and odors in the
project vicinity. None of the adjacent businesses were identified as sources of air pollutants or
odors during site visits, however, employees’ vehicles and delivery and/or product transport
trucks contribute to pollutants and odors in the project vicinity.

Inflow Conveyance
Wastewater inflow would be conveyed to the new wastewater treatment plant from pump
stations both north and south of the proposed treatment plant site (Figure 2-5). One inflow
option would initiate at a new North Valley Interceptor Pump Station as described above for
Stockyards' Trent Avenue inflow option. This route (Fancher Road option) would traverse road
right-of-way in a southerly direction until it enters the treatment plant site. With the exception of
the single-family residential area near the pump station, this route would traverse a primarily
industrial/commercial area. The main source of existing odors and air pollutants along this route
are vehicles, including large trucks. The Fairgrounds option, from a new South Valley
Interceptor Pump Station, would be located at approximately Interstate 90 and East 2nd Avenue
or East 3rd Avenue. This route would also traverse roadways entirely within an industrial/
commercial area, turning east along the south boundary of the Interstate Fairgrounds. The main
source of existing odors and air pollutants along this route are vehicles, including large trucks,
and railroad engines. Dust is created by winds or activity on unpaved and gravel areas or
roadways.

Outfall Conveyance
The Alki/Fancher Outfall Conveyance routes both traverse areas that are primarily
industrial/commercial in nature. The Havana Street option primarily heads north and terminates
at the Rebecca Street Outfall (see Figure 2-5 for a map of the route). This route does not abut
any residential areas or sensitive uses. The Broadway Avenue option heads west and terminates
at the Springfield Avenue Outfall (see Figure 2-5 for a map of the route). This route is very
similar to the Stockyards' Springfield Avenue outfall option with the east half of this route
traversing a primarily industrial/commercial area and the west half traversing a mix of industrial,
commercial, and residential uses. The main source of odors or air pollutants along these routes
would be from vehicles, including large trucks, using the area roadways. Dust is created by
winds or activity on unpaved and gravel areas or roadways.

Rebecca Street Outfall
The proposed Rebecca Street Outfall location is along a developed portion of the bank of the
Spokane River (Figures 2-1, 2-3, and 2-5). Adjacent to the top of the riverbank is a logger skills
arena that is a source of air pollutants only during practices and competitions held periodically
throughout the year where chainsaws are in use and vehicles enter and leave the site. East

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                                                          Spokane County WWTP Final Supplemental EIS


Ermina Avenue runs west from Rebecca Street along the top of the riverbank. This street
provides access to a portion of the Spokane Community College campus. A Spokane
Community College maintenance facility is located at the southwest corner of the intersection of
Rebecca Street and East Ermina Avenue. Maintenance vehicles periodically enter and leave this
facility, but are not a major source of pollution or odors. The north bank of the Spokane River
opposite the proposed outfall location is higher than the south bank. East Upriver Drive and the
Centennial Trail follow the top of the north bank. Vehicles using East Upriver Drive produce
exhaust that could be detectable to homes adjacent to the north. Dust is created by wind or
activity on unpaved or gravel areas or roadways. Upstream approximately 0.5 mile of the
proposed outfall is an animal rendering plant that frequently produces severe odors that are
detectable up to three miles away. SCAPCA averages approximately 40 complaints per year on
the rendering plant. However, as of September, the agency has received approximately 700
complaints for the year 2002 (Edgar, personal communication, 2002).

Springfield Avenue Outfall
The proposed Springfield Avenue Outfall is located along the south bank of the Spokane River
near the intersection of East Springfield Avenue and North Denver Street (Figures 2-1, 2-3,
and 2-5). The property in the immediate vicinity of the proposed outfall location appears to be
an abandoned concrete plant or similar business. A masonry supply business is currently
operating adjacent to this location to the south. This business may produce small quantities of
dust. No odor- or air pollution-producing activities currently occur in this area. Across from the
outfall location on the west bank is a mini mall with a restaurant, a coffee-roasting facility, and
other service-oriented businesses. The restaurant has outdoor seating along the riverbank during
the warm months, and is situated just downstream and across from the outfall location. Other
than vehicle exhaust from consumers entering and leaving the area, no air pollutant-producing
activities occur in the area. The coffee roasting business and the restaurant emit exhaust and
food odors, but these do not appear to present air quality issues for the area.
IMPACTS

Construction
Stockyards Alternative
Project Site. Construction impacts to air quality at the Stockyards site would include dust from
large-scale excavation and construction activities, asphalt fumes from paving operations, and
vehicle exhaust from construction equipment, heavy trucks, and workers' vehicles. People in
passing vehicles or workers at nearby properties would experience dust or odors during the
construction period, particularly during the initial excavation and grading phases. Twenty to
twenty-five truck loads of earth would be moving off and on to the site each day during the first
two years of construction Vehicle exhaust and dust generated by vehicles and equipment driving
through the site would be the main source of impacts to air quality. Dust would contribute to
particulate matter problems in the area.
People in passing vehicles would notice dust or odors as they pass the construction site.
However, since they will be in the vicinity for only a matter of minutes, impacts would be
minimal. Employees of the businesses near and adjacent to the site would also likely notice dust
and exhaust odors. These businesses face north and front East Boone Avenue. The south sides
of their buildings facing the Stockyards site are solid with no windows or doors, effectively

December 2002                                                                               Page 3-5
Spokane County WWTP Final Supplemental EIS


blocking the majority of dust and/or exhaust generated during construction activities. Buildings
adjacent to the vacated portion of Julia Street that ends at the project site, do have windows
and/or doors facing west or east and could experience some negative effects from dust and odors
entering their workspaces. These openings could be closed during construction activity,
blocking the majority of fugitive dust and odors.

These impacts are expected to occur intermittently during the allowable construction hours
between 7 a.m. and 10 p.m. within Spokane County (Spokane County Code, Section 6.12.020,
Exemptions), between 6 a.m. and 10 p.m. within the City of Spokane, and for the period of
construction only (approximately 2.5 years). Even with the implementation of appropriate
mitigation measures, substantial negative impacts from dust and odors are expected in the
vicinity of the Stockyards site as a result of construction activities.

Inflow Conveyance. Short-term impacts to air quality resulting from construction of the inflow
conveyance route would include dust from excavation and grading, asphalt fumes from paving
operations, and vehicle exhaust from construction equipment, heavy trucks, and workers'
vehicles. Pipeline construction would be open trench, exposing soils which could create dust
clouds from wind or soil-disturbing construction activities. Dust would contribute to particulate
matter problems in the area. People in passing vehicles, or residents or workers at nearby
properties may detect odors from vehicles and equipment at intermittent points during
construction of the conveyance system. Impacts would occur intermittently during allowable
construction hours for the period of construction only. The conveyance system would be
installed in block-by-block segments, and construction would last approximately 4 weeks in any
given segment. Because impacts to air quality during installation of the conveyance system are
short-term and temporary, they are not expected to be significant.

Outfall Conveyance. Construction-related air quality impacts for the Stockyards Rebecca Street
outfall conveyance route would be generally the same as described above for the inflow
conveyance routes.

Air quality impacts resulting from construction of the Springfield Avenue option would be
generally the same as described above for the Rebecca Street option. The Springfield Avenue
option passes through a single-family neighborhood at the west end of the route. Dust and
exhaust odors from construction vehicles and equipment could be annoying to some residents as
dust could drift into yards and homes near the construction area. Dust would contribute to
particulate matter problems in the area. Odors from construction vehicles and equipment could
also drift into nearby homes. These impacts would last approximately 4 weeks for any given
segment and may be problematic for individuals with respiratory problems if they remained
outdoors for extended periods during construction activities. Negative impacts to nearby
properties or residences may seem significant to individuals. Impacts are not expected to be
significant due to the short duration of conveyance construction activities.

Alki/Fancher Alternative
Project Site. In general, impacts from dust and odors from construction activities at the
Alki/Fancher site would be similar to those described above for the Stockyards Alternative. The
Alki/Fancher site, however, is located near a high-use shopping area that is expected to continue
to expand over the next few years. Phase 1 project components would generally be constructed

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                                                          Spokane County WWTP Final Supplemental EIS


on the northern portion of the project site and construction access would be from East Alki
Avenue. The shopping area to the south includes large-scale businesses such as Home Depot
and Costco, and a variety of smaller stores, eating establishments, and other service-type
businesses. The proposed Alki/Fancher site south boundary is separated from this shopping area
by an access road and railroad lines, providing approximately 600 feet of separation. The
shopping area buildings also face south and their north, east, and west sides are generally the
service side with few or no doors or windows. Dust and odors would not easily penetrate these
businesses, but their associated parking and walkway areas could experience some dust, and
people using the stores and shopping area could detect exhaust odors from vehicles and
equipment. Dust would contribute to particulate matter problems in the area. Due to prevailing
wind direction the frequent northeasterly winds in winter, some limited dust and odor impact
could be experienced in this area.

Inflow Conveyance. Construction-related air quality impacts for the proposed Alki/Fancher
inflow conveyance routes would be generally the same as described above for the Stockyards
inflow conveyance routes.

Outfall Conveyance. Air quality impacts resulting from construction of the Havana Street
outfall option would be the same as described above for the Stockyards' inflow conveyance
routes. Air quality impacts resulting from construction of the Broadway Avenue option would
be generally the same as described above for the Stockyards' Springfield Avenue outfall
conveyance option.

Rebecca Street Outfall
Impacts to air quality due to construction of the Rebecca Street Outfall would mainly consist of
construction exhaust from vehicles and equipment and minor fugitive dust at the location of the
outfall. The outfall would be located at the northeast corner of the Spokane Community College
campus near the location of athletic facilities and a logger skills arena; the immediate area is not
a high use area. This outfall is also located across the Spokane River to the south from East
Upriver Drive and a residential area (Figure 2-5). The construction site is at a lower elevation
than the road and residential area, with East Upriver Drive located between the north bank of the
river and the residential area. Because of the distance between the construction area and
residences, the elevation difference, and the implementation of appropriate mitigation measures,
construction impacts to air quality in this area are not expected to be substantial.

Springfield Avenue Outfall
Impacts to air quality related to the construction of the Springfield Avenue Outfall would be
generally the same as described above for the Rebecca Street Outfall. The Springfield Avenue
Outfall is located at approximately the terminus of East Springfield Avenue on the south bank of
the Spokane River. Across the Spokane River from the outfall location is a retail area that
includes restaurants with outdoor seating (Figure 2-5). Due to the distance between the
construction area and the retail area and the presence of vegetation along the west bank, impacts
from dust and odor are not expected to be substantial. In addition, Best Management Practices
(BMPs) would be implemented to further reduce impacts to this area, particularly the outdoor
restaurant seating.



December 2002                                                                               Page 3-7
Spokane County WWTP Final Supplemental EIS


No Action Alternative
Under the No Action Alternative no construction-related impacts to air quality would occur
because no new facilities would be constructed. Dust and odors would remain similar to what is
currently experienced by neighboring businesses and/or residences.

Operation
Stockyards Alternative
Project Site. Odor-causing substances that commonly occur in wastewater consist of both
organic and inorganic compounds. The compounds usually arise from biological activity in the
wastewater collection and treatment system. Most odor-causing compounds form as a result of
anaerobic decomposition of organic material containing sulfur and nitrogen. Odor emissions are
most likely to occur during periods of increased ambient temperature and at points of turbulence
within the collection and treatment processes. The presence and direction of prevailing breezes
and the proximity of homes or offices to the proposed treatment plant would influence the degree
of impact, and impacts could vary as weather patterns change throughout the year.

Treatment of wastewater could result in the release of volatile organic compounds (VOCs) or
aerosols. VOCs are compounds of carbon (excluding carbon monoxide, carbon dioxide,
carbonic acid, metallic carbides or carbonates, and ammonium carbonate) which participate in
atmospheric photochemical reactions. Aerosols are very small airborne droplets that may be
generated at aerated process points in a wastewater treatment plant and can be carried through
the atmosphere. Adverse impacts associated with VOCs and aerosols are not expected to be
significant because the majority of treatment plant processes would be enclosed to prevent
untreated dispersion of VOCs and aerosols to the outside environment. The County’s
pretreatment program, which prohibits the discharge of volatile substances to the sewer system
(Spokane County Code Title 8), will minimize the potential for VOCs. The County will install
detection devices to provide warning of VOCs in the wastewater system. The air drawn off the
enclosed structures housing the treatment processes would be treated via a compost bed or a
chemical scrubber prior to release. The biobeds would be lined and a drainage system would be
installed to collect any water that drains through the beds. The collected water would be routed
to the treatment plant for processing. The odor-scrubbing system must meet stringent standards
for removal of hydrogen sulfide, ammonia, and organic odor constituents. Because of the odor
control methods that would be incorporated into plant design, detectable odors are expected to be
minimal.

Unit processes that would be covered or enclosed for odor control would include:

•   Septage Receiving                        •   Waste Activated Sludge Thickening
•   Influent Screening                       •   Anaerobic Digester Overflow Boxes
•   Grit Removal                             •   Liquid Sludge Storage Overflow Boxes
•   Primary Clarification                    •   Sludge Dewatering
•   Membrane Bioreactors                     •   Dewatered Sludge Storage and Load-Out
•   Primary Sludge Thickening




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                                                          Spokane County WWTP Final Supplemental EIS


Employee vehicles and septage haulers would be a small contributor to air pollutants and odors
in the area, with the new treatment plant expected to generate approximately 18 to 20
24 employee vehicle trips and approximately 24 septage hauler trips per weekday and
approximately 4 employee vehicle trips per weekend day. The treatment plant components
would not be a source of carbon monoxide.

Air quality impacts from emergency generators are expected to be negligible since the generators
would only be used during major emergencies.

No impacts to surrounding properties are expected due to odor control mechanisms incorporated
into plant design and the lack of sensitive receivers with the Alternative's industrial location
(Figure 2-1).

The treatment plant would produce natural gas. The County has not yet decided how this gas
will be processed. Options include energy recovery techniques, heating the digesters, and flaring
excess gas. The selected process will comply with all required air quality permits.

Inflow Conveyance. Impacts to air quality related to operation of the Stockyards Rebecca Street
and Springfield Avenue inflow conveyance options would be minor and would mainly consist of
exhaust produced by worker vehicles during routine maintenance activities.

Some odors could be detectable at access portals along the selected conveyance route, but are not
expected to be a substantial impact to air quality due to odor control methods implemented at
portals and to the location of portals within road right-of-way.

Conveyance of wastewater could result in the release of volatile organic compounds (VOCs,
described above) or aerosols at the pump stations. No negative impacts are expected as pump
stations would be enclosed and odor control devices installed at pump stations to prevent
untreated dispersion of VOCs and aerosols to the outside environment. Proposed pump stations
at the North Valley Interceptor and Spokane Valley Interceptor locations (Figures 2-3 and 2-5)
would be located within residential areas. None of the proposed locations are expected to have
negative impacts to air quality with the implementation of BMPs to control odor.

Outfall Conveyance. Operation-related air quality impacts for the Stockyards Outfall
Conveyance routes is not anticipated because the effluent would be highly treated prior to release
from the treatment plant.

Alki/Fancher Alternative
Project Site. Impacts resulting from operation of the new wastewater treatment facility at the
Alki/Fancher site would be generally the same as described above for the Stockyards Alternative.
Significant adverse impacts are not expected to occur in this location because of odor control
equipment that would be installed as part of the plant design. In addition, treatment plant
processes would not produce carbon monoxide. All odor-producing processes would be
enclosed, and air drawn off would be scrubbed to remove odors prior to release to the
environment. The Alki/Fancher site, however, is located north of a busy retail area. If detectable
levels of odors escape the treatment facility and drift south to the shopping area, some visitors to
the stores in this location could find them offensive. Due to prevailing winds from the southwest

December 2002                                                                               Page 3-9
Spokane County WWTP Final Supplemental EIS


throughout much of the year, odor impacts are not expected to be significant in this retail area.
Odor impacts could occur in winter when prevailing winds are sometimes from the northeast.

Inflow Conveyance. Operation-related air quality impacts for the Alki/Fancher Inflow
Conveyance routes would be generally the same as described above for the Stockyards Inflow
Conveyance routes.

Outfall Conveyance. Impacts related to operation of the Alki/Fancher Havana Street and
Broadway Avenue outfall options would be the same as described above for the Stockyards
Outfall Conveyance route options.

Rebecca Street and Springfield Avenue Outfall Options
Effluent from the proposed new Spokane wastewater treatment facility would be treated to
Ecology standards and discharged via an outfall port into the Spokane River below water level.
Therefore, no impacts to air quality (including odors or airborne pollutants) are expected to occur
at either the Rebecca Street or Springfield Avenue Outfall options.

Biosolids
Biosolids would be produced as a by-product of the wastewater treatment process. Air quality
impacts could result from biosolids transport and re-use on farmland for agricultural purposes or
mine site reclamation. Some odor could escape to the environment during loading into trucks.
These occurrences would be minor due to the enclosed operation, dispersion, and distance from
receptors. Biosolids applied to agricultural lands may emit a musty organic or ammonia-like
odor when freshly applied. The odor diminishes rapidly as the biosolids dry out. Odor
associated with biosolids application is very localized and dissipates quickly with distance.
Some exhaust would be produced by heavy trucks used to transport biosolids from the plant to
disposal areas. These impacts are generally minor and are not expected to have significant
negative impacts to surrounding properties due to the distance and dispersed nature of homes in
agricultural areas.

No Action Alternative
Should Under the No Action Alternative be selected, impacts to air quality from increased odor
production at the SAWTP would likely occur when the SAWTP reaches and exceeds its design
capacity for effectively treating the area's wastewater. At present, SCAPCA receives an average
of 1 to 2 complaints per year regarding the SAWTP; some years no complaints about treatment
plant odors are received. The increase in odor production anticipated under the No Action
Alternative would occur once the SAWTP reaches and exceeds its design capacity for effectively
treating the area's wastewater. An increase in the number of odor complaints received by
SCAPCA would be expected.




Page 3-10                                                                             December 2002
                                                                  Spokane County WWTP Final Supplemental EIS



MITIGATION MEASURES

Construction
Mitigation measures that could be implemented to minimize construction impacts to air quality could include the
following:

•   Implement a dust control plan according to Spokane County Pollution Control Agency's
    guidelines as regulated through SCAPCA's Registration and Notice of Construction programs
    and as described at http://www.scapca.org/dust.html.
•   Shut off engines when not in use.
•   Maintain construction vehicles and equipment in good condition.
Operation
The proposed new treatment plant system would incorporate odor control equipment as part of system design and
operation. Odor control would include enclosing all locations where there is a substantial potential for odor
generation, including pump stations, collecting emissions, and “scrubbing” to remove odors or other contaminants
prior to release to the environment. Mitigation measures that could be implemented to minimize operation impacts
to air quality could include the following:

•   Properly size transport systems and areas exposed to the atmosphere;
•   Service odor control units regularly;
•   Keep equipment and vehicles in good working order to reduce emissions;
•   Implement process controls that optimize the breakdown of wastes in the wastewater stream;
•   Maintain a minimum distance of 50 feetDistance between plant structures and the property line
    would meet appropriate zoning requirements.




December 2002                                                                                           Page 3-11
Spokane County WWTP Final Supplemental EIS



                                 SURFACE WATER
This section describes the surface water resources of the project area and the existing water
quality of those resources. Groundwater resources are discussed in the following section of the
Supplemental EIS. Although surface and groundwater are discussed separately, there is a high
degree of hydraulic connectivity in the Spokane area. This connectivity is discussed in the
groundwater section of this document. Impacts of each of the proposed alternatives on surface
water resources and surface water quality are discussed in this section.
AFFECTED ENVIRONMENT

Major Surface Water Bodies
The major surface water body in the area of the wastewater treatment plant alternative sites is the
Spokane River, which flows through the City of Spokane. The source of the Spokane River is
Lake Coeur d'Alene in Idaho. The river is approximately 111 miles long and drains an area of
6,580 square miles including the Coeur d’Alene and St. Joe Rivers. The river flows in a westerly
direction from the lake through the City of Spokane (See Figure 3-1). Below the city, the river is
dammed by Long Lake Dam to form Long Lake (also known as Lake Spokane). Below Long
Lake, the river flows into the Columbia River at Franklin D. Roosevelt Lake, which backs up
into the Spokane River. There are five hydroelectric dams on the Spokane River between the
Idaho border (RM 96) and Lake Roosevelt. These dams are Upriver Dam (RM 79.9), Division
Street Diversion Dam (RM 74.4), Monroe Street Dam (RM 73.9), Nine-Mile Dam (RM 57.6),
and Long Lake Dam (RM 33.9). Post Falls Dam in Idaho (RM 100.8) influences the hydrology
of the Spokane River through the project area. All of the dams but Long Lake Dam are run-of-
river dams, not storage dams. Run-of-river dams back up only enough water to maintain an
adequate volume of water for operation of the hydroelectric turbines. The alternative treatment
plants, conveyance routes, and outfall locations are located near the stretch of river between
Upriver Dam and Division Street Dam. This stretch of river contains all or part of Reaches 4 and
5 discussed in the Groundwater section (Figure 3-2). This section of the river is incised with
high banks of 15 to 30 feet before reaching street grade.

The Spokane River experiences seasonal streamflow fluctuations, with flows peaking during
spring snow melt and declining in late summer. Typical streamflows range from substantially
less than 2,000 cubic feet per second (cfs) in August to 20,000 cfs in May or June (Spokane
County, 2001c). Historically peak flows have exceeded 45,000 cfs (USGS, 2002). Low
streamflows are a problem in summer and affect water quality. Avista Utilities agreement with
the State of Idaho to maintain the level of Lake Coeur d'Alene limits the amount of flow released
to the Spokane River. After the summer lake level is reached in the early summer, streamflows
are regulated at the Post Falls Dam operated by Avista. Ecology has a recommended minimum
flow for the Spokane River to be used for conditioning new water rights in the basin. A
minimum flow of 2,000 cfs at the Spokane gage, based on Washington Department of Fish and
Wildlife recommendations, is used for water rights decisions, but has not been adopted as an
administrative rule.




Page 3-12                                                                            December 2002
                                                                                                                                                                                                                      Eloika Lake

                                                                                                          Spokane River Dams                                                                                                                            Reflection Lake

                                                                                                          Streams
                                                                                                                                                                                                                       Bailey Lake
                                                                                                          Waterbodies
                                                                                                                                                                                                          Deer Park
                                                                                                          Major Roads
                                                                                                          Cities                                                                                                             Bear Lake




                                                                                                                                                                                                                                                 R i v er
                                                                                                                                                                                                                      Owen's Lake
                                                                                                                                                                                                          395
                                                                                   0   1.25 2.5                       5            7.5                 10




                                                                                                                                                                                                                                                a ne
                                                                                                                                                        Miles




                                                                                                                                                                                                                                        pok




                                                                                                                                                                                                                                                                                                                           IDAHO
                                                                                                                                                                                                                                     Little S
                                                                                                                                                                           Stevens County
                                                                                                                                  Knight Lake                                                                                          2
                                                                                           Long Lake Dam
                                                                                                                                         Sp o
                                                                                                                                              k




                                                                                                                                                  ne
                                                                                                                                             a




                                                                                                                                                       Riv
                                                                                          Spokane River
                                                                                                                                                         er




                                                                                                                                                                                                                                                                                                      Newman Lake


                                                                                                                      Davis Lake                                                            Nine Mile Dam

                                                                                                               Horseshoe Lake




                                                                                                                                                                                                                                                   Upriver Dam
                                                                                                                                                                                                            City of Spokane


                                                                                                                                                                                                                                ane Riv e
                                                                                                                                                                                                                                                r
                                                                                                                                                                                                                            k
                                                                                                                                                                                                                        Sp o



                                                                                                                                                                                               Monroe Street Dam                                                          City of                90

                                                                                                                                                                                                                                                                       Spokane Valley Shelley Lake          Liberty Lake
                                                                                                                                                                   Airway Heights
                                                                                                                                                                                                                            Division Street Dam
                                                                                        Lincoln County




                                                                                                                             2
                                                                                                                                           Fairchild AFB



                                                                                                                           Medical Lake
                                                                                                                           West Medical Lake
                                                                                                                                  Medical Lake
                                                                                                                                           Silver LakeWillow Lake
                                                                                                                  Hedin Lake         Otter Lake Granite LakeMeadow Lake
                                                                                                                 Lonelyville Lake
                                                                                                                                                       90
                                                                                                                                   Clear Lake                                                 Fish Lake
                                                                                                                                                                                                                                                                           R o ck
                                                                                                                                Heron Pond                                                                                   195                                                    Cre
                                                                                                                                                                                                                                                   La




                                                                                                                                                                           Cheney                                                                           tah                         ek
                                                                                                                                                                                                                                                              Cree k




                                                                                                                                                              Long Lake
L:\ENVIR IMPACTS\2000 projects\20062 SPK Co WW Plan\Phase 1\gis\spokane_eis2.mxd




                                                                                                                                                                             Kepple Lake
                                                                                                                                                        Lasher Lake
                                                                                                                                                  Campbell LakeTurnbull Slough
                                                                                                                                                              Turnbull Slough                                Philleo Lake

                                                                                                                                                                       Isaacson Lake Stubblefield Lake


                                                                                                                                    Martin Lake
                                                                                                         Hog (Deep) Lake          Alkali Lake

                                                                                                   Clear Lake
                                                                                                                                                             Badger Lake
                                                                                              Fishtrap Lake Mason Lake Amber Lake

                                                                                                                                         Williams Lake


                                                                                                            Map data shown are the property of the                                                                                                                                         FIGURE 3-1
                                                                                                            sources listed below. Inaccuracies may
                                                                                                            exist, and Adolfson Associates, Inc. implies                                                                                                               SPOKANE AREA WATER RESOURCES
                                                                                                            no warranties or guarantees regarding any
                                                                                                            aspect of data depiction.                                                         SPOKANE COUNTY REGIONAL WASTEWATER TREATMENT PLANT
                                                                                                            Source: Spokane Co. GIS, 2001                                                                             SPOKANE COUNTY, WASHINGTON
                                                                                               Streams
                                                                                               Sensitive Aquifer Boundary

                                                                                               Waterbodies

                                                                                               Priority Sewer Service Area
                                                                                               Major Roads
                                                                                               Urban Growth Area


                                                                                      0    1     2           4              6    8
                                                                                                                                  Miles                                      L i t t l e
                                                                                                       SEPTEMBER 12, 2002
                                                                                                                                                                            S p o k a n e
                                                                                                                                                                              R i v e r

                                                                                                                                                                395

                                                                                                                                                    D e e r   P a r k
                                                                                                                                   Stevens County




                                                                                                                                                                                                                             Idaho
                                                                                                                                                                                    2
                                                                                                                                                                                                   G r e e n
                                                                                                                                                                                                    B l u f f




                                                                                                                                                                                             P e o n e
                                                                                                                                                                                             P r a i r i e



                                                                                                                                                                                        O r c h a r d P l e a s a n t
                                                                                                                                                                                                  P r a i r i e




                                                                                          W e s t P l a i n s S u b - U n i t o f
                                                                                          E a s t C o l u m b i a P l a t e a u                                              S p o k a n e     -   R a t h d r u m      90




                                                                                           2
L:\ENVIR IMPACTS\2000 projects\20062 SPK Co WW Plan\Phase 1\gis\spokane_AQUIFER.MXD




                                                                                                                 90                                           E a s t C o l u m b i a
                                                                                                                                                                     P l a t e a u

                                                                                                                                                                             195




                                                                                                     Map data shown are the property of the                                                                 FIGURE 3-2
                                                                                                     sources listed below. Inaccuracies may
                                                                                                     exist, and Adolfson Associates, Inc. implies                                              SPOKANE AREA AQUIFERS
                                                                                                     no warranties or guarantees regarding any
                                                                                                     aspect of data depiction.                                    SPOKANE COUNTY REGIONAL WASTEWATER TREATMENT PLANT
                                                                                                     Source: Spokane Co. GIS, 2001                                                        SPOKANE COUNTY, WASHINGTON
                                                         Spokane County WWTP Final Supplemental EIS


Most stormwater in the city of Spokane is conveyed to the SAWTP where it is treated and
discharged. During moderate to heavy rainfall and snowmelt events, stormwater is discharged
directly to the Spokane River through combined storm and sewer systems (CSOs) (City of
Spokane, 2002). CSO outfalls are located on the Spokane River downstream of both the
Rebecca Street and Springfield Avenue outfall sites. The CSO discharges include a combination
of stormwater and diluted, untreated sewage. At this time, the number of City of Spokane CSO
discharges exceed state guidelines. The City has been working to reduce the number of these
discharges since the mid-1980s. Stormwater in the unincorporated areas is primarily disposed of
into percolation or infiltration facilities.
Wastewater Treatment Plant Site Alternatives and Conveyance Route Options
Both of the alternative sites for the wastewater treatment plant and all of the conveyance routes
are located in the upland area above the Spokane River. None of the sites or routes is located
near any natural surface water bodies. The Stockyards site is approximately 0.5 mile south of the
Spokane River and the Alki/Fancher site is approximately 1 mile southeast of the river. An
abandoned gravel pit, partially filled with groundwater is located immediately west of the
Alki/Fancher site. There are no other streams or surface water bodies on or adjacent to the sites
or along any of the proposed conveyance routes. A wetland reconnaissance conducted in April
2002 determined that no wetland hydrology criteria were met on either of the sites proposed for
the wastewater treatment plant (URS, 2002). There are no wetlands located along any of the
conveyance routes (WDFW, 2001). Floodplains in the area are confined to the area immediately
adjacent to the Spokane River. Both plant sites and all the conveyance routes are located outside
the floodplain (City of Spokane, 2001b).
Rebecca Street Outfall
The Rebecca Street Outfall pipeline would be located on the south bank of the Spokane River
approximately 1.5 miles downstream of Upriver Dam, and the outfall port would be located on
the riverbed at that location. There are no wetlands at the potential outfall location. The site
would be within the floodplain of the Spokane River.
Springfield Avenue Outfall
The Springfield Street Outfall site is located on the south bank of the Spokane River
approximately 4 miles downstream of Upriver Dam. There are no wetlands at the potential
outfall site. The site lies within the floodplain of the Spokane River.
Biosolids
Biosolids would be applied to agricultural lands or reclaimed mining sites in the County. These
sites could be located near surface water bodies.

Water Quality
Several segments of the Spokane River have been placed on the federal Clean Water Act Section
303(d) list of impaired water bodies. Water bodies are included on the 303(d) list because water
quality does not meet state standards and technology based controls are inadequate to achieve
those standards. Ecology's 303(d) list for the Spokane River includes the constituents arsenic,
cadmium, chromium, dissolved oxygen (DO), lead, PCBs, sediment bioassay, and zinc.
Cadmium, lead, and zinc concentrations often exceed state water quality standards at the state
border. The source of these contaminants is attributed to the discharge of heavy metals at the

December 2002                                                                             Page 3-15
Spokane County WWTP Final Supplemental EIS


Bunker Hill Superfund site on the South Fork Coeur d'Alene River, which discharges to Lake
Coeur d'Alene. Much of the metal loading reaching Washington is from the resuspension of
sediment deposited outside the designated Bunker Hill Superfund site. For 303(d) water bodies,
the state must develop Total Maximum Daily Loads (TMDL) or maximum limits on the amounts
of pollutants that can be discharged to a water body and allow that water body to meet water
quality standards. Ecology has established TMDLs on the Spokane River for phosphorous and
metals (cadmium, lead, and zinc) and is considering a TMDL for dissolved oxygen in Long Lake
and the Spokane River.

Proposed Water and Effluent Quality Standards
A preliminary assessment has been made of likely effluent quality requirements for discharge of
wastewater to the Spokane River based on state water quality standards and seasonal
characteristics of the river (Spokane County, 2001b). These potential requirements are shown in
Table 3-1. Discharge requirements will be established by Ecology during the National Pollution
Discharge Elimination System (NPDES) permitting process. The permitting process requires the
County to demonstrate that effluent discharge will allow the receiving waters to meet water
quality standards.

The summer low-flow period is the most critical for water quality; therefore, Ecology typically
establishes seasonal permit limits for wastewater discharges. The more stringent requirements
are in summer. The anticipated discharge requirements shown in Table 3-1 reflect the need for
more strict requirements in summer. They were developed as assumptions to guide County
planning and analysis. Ecology has not completed the TMDL study for dissolved oxygen in the
Spokane River. Results of that study will affect allowable effluent limits for constituents such as
biochemical oxygen demand (BOD), ammonia nitrogen, and phosphorous that reduce dissolved
oxygen in the river and in Long Lake. Consequently, relatively conservative assumptions were
used in developing the anticipated effluent quality requirements listed in Table 3-1.

               Table 3-1. Anticipated Effluent Quality Requirements for
                New Surface Water Discharges for the Spokane River.
                                       Summer Permit Season           Winter Permit Season
                                          (May – October)              (November – April)
              Parameter
                                       Monthly                       Monthly
                                                    Daily Limit                  Daily Limit
                                       Average                       Average
    CBOD5, mg/La                          -             10              30             -
    Total Suspended Solids, mg/L         10              -              30             -
    Ammonia-Nitrogen, mg/La               -             2-3              -            24
    Nitrate-Nitrogen, mg/L                -              -               -             -
    Total Phosphorus, mg/La              0.5             -               -             -
    Dissolved Oxygen, mg/La               -             >5               -             -
    Fecal Coliform, cfu/100 mL           200             -             200             -
    pH (s.u.) b                           -          6.0 – 7.8           -         6.0 – 7.8
    Chlorine Residual, µmg/Lc             8             22              8             22




Page 3-16                                                                            December 2002
                                                                               Spokane County WWTP Final Supplemental EIS


                                                    Summer Permit Season                        Winter Permit Season
                                                       (May – October)                           (November – April)
                 Parameter
                                                    Monthly                                    Monthly
                                                                 Daily Limit                               Daily Limit
                                                    Average                                    Average
    Lead, µmg/Ld                                       2              3                           2              3
    Zinc, µmg/Ld                                      60             82                          60             82
    Cadmium, µmg/Ld                                   0.2            0.3                         0.2            0.3
   a. Actual permit limit will be defined based on on-going dissolved oxygen TMDL process.
   b. Instantaneous value.
   c. Effluent disinfection will use ultraviolet light.
   d. Required value will be defined based on monitoring of actual effluent metals concentrations.


The proposed treatment technology at the Spokane County wastewater treatment plant would
employ a membrane bioreactor followed by ultraviolet light disinfection. As shown in
Table 3-2, this treatment system would produce an effluent quality that would comply with
currently anticipated permit limits for discharge to the Spokane River.

       Table 3-2. Projected Performance of Proposed Treatment Technology
                             (Summer Permit Season)

    Parameter                                                   Projected Treatment                     Anticipated
                                                                 Plant Performance                    Discharge Limita
    Biochemical Oxygen Demand (BOD), mg/L                                     <2                                10
    Total Suspended Solids (TSS), mg/L                                        <2                                10
    Ammonia-Nitrogen, mg/L                                                    <2                               2-3
    Nitrate-Nitrogen, mg/L                                                    <8                             No Limitb
    Total Phosphorus, mg/L                                                   <0.1                              0.5
    Turbidity, NTU                                                            <1                               2.2c
   a
     Permit requirements are based on preliminary discussions with Ecology and water quality modeling results;
     however, these limits may change as a result of the dissolved oxygen TMDL process.
   b
     Nitrate removal is not required for discharge to the river, but will minimize impacts to groundwater quality if the water
     is irrigated over the aquifer or if water discharged to river recharges groundwater.
   c
     The turbidity limit applies to reclaimed water use, not discharge to the river.

IMPACTS

Construction
Wastewater Treatment Plant Site Alternatives
The construction impacts on surface waters for both treatment plant alternative sites are expected
to be minimal. There are no water bodies on either the Stockyards or Alki/Fancher site that
could be directly impacted by construction. Construction activities at either site could lead to
erosion, but any erosion would be unlikely to cause impacts to surface water bodies or water
quality. Neither of the alternative sites is located in proximity to a water body that could be
impacted by runoff from construction.

Inflow and Outflow Conveyance
None of the conveyance routes would cross any water bodies. Direct construction impacts are
unlikely for most of the length of all the conveyance routes because the routes are in upland
areas and are not located near any water bodies. Construction of outfall conveyance routes could
result in water quality impacts at the outfall end of the routes if runoff from construction occurs.

December 2002                                                                                                               Page 3-17
Spokane County WWTP Final Supplemental EIS


Outfall Options
Construction of the outfall at either the Rebecca Street or Springfield Avenue location could
impact water clarity with release of sediments in the Spokane River. The outfall would be
placed in the river and installation would require disruption of the riverbed and temporary
diversion of the river around the outfall location. These impacts would be temporary and
construction would comply with all requirements of WDFW's HPA and the Corps permit.
Following construction, the temporary diversion structure would be removed and the stream
bank would be restored.

No Action Alternative
Because there would be no construction associated with the No Action Alternative, there would
be no construction-related impacts.

Operation
Wastewater Treatment Plant Site Alternatives
After completion of the wastewater treatment plant, there would be no significant operational
impacts to surface water bodies. Stormwater generated at process and other working areas on the
treatment plant site would be collected and processed through the treatment plant. Stormwater
generated at parking lots and other general areas of the wastewater plant site where no
wastewater or biosolids are handled would be routed to biofiltration swales for treatment, and
then infiltrated into the ground.
Containment and spill procedures would be provided where chemicals are stored or loaded. The
treatment plant would comply with all applicable regulations pertaining to chemical storage,
containment, and spill response.
Operation of the new County wastewater treatment plant would eliminate County wastewater
from a portion of the City of Spokane conveyance system (Interceptor No. 05). This stretch of
interceptor is along the Spokane River and has multiple CSO outlets. Eliminating County flow
from this pipeline could reduce CSOs in this area. The reduction of flows in the County's
interceptor system would also help reduce the potential for CSOs in the central portions of the
City's conveyance system. This would benefit water quality in the Spokane River.
Inflow and Outfall Conveyance
Once the conveyance routes have been completed, there would be no significant operational
impacts to surface water along most of the routes. The open trenches for the pipelines would be
filled and repaved or revegetated as appropriate. There would be no surface runoff along the
conveyance lines. If an inflow pipeline broke, untreated sewage could leak from the pipe. The
only inflow conveyance line that is close to a surface water body is the route from the Rebecca
Street Pump Station to the Stockyards site. Leaks along the outfall conveyance routes should not
pose a threat to water quality since the effluent in the pipes would be treated.

Outfall Options
The wastewater treatment plant would discharge into the Spokane River at one of two locations
below Upriver Dam. Discharge of effluent to the Spokane River could have several water
quality impacts because of existing water quality problems in the river. Water quality
parameters that could be of concern include near-field dissolved oxygen; far-field dissolved

Page 3-18                                                                           December 2002
                                                         Spokane County WWTP Final Supplemental EIS


oxygen; temperature; ammonia toxicity; chlorine toxicity; lead, cadmium, and zinc; other metals;
and polychlorinated biphenyls (PCBs).
The proposed treatment plant would discharge 34 cfs of effluent to the Spokane River in 2025.
This compares to average monthly streamflows of 1,400 cfs in August and 17,000 cfs in May. In
2025, the amount of effluent discharged would represent approximately 6 percent of the critical
low flow of 600 cfs. The critical low flow is based on the 7Q20 flow—the lowest 7-day average
flow based on a 20-year return interval.
Preliminary water quality monitoring indicates that effluent discharge to the Spokane River at
the Rebecca Street outfall location would decrease dissolved oxygen in the sections of the river
downstream of the outfall by less than 0.2 milligrams per liter (mg/L) (HDR Engineering, Inc.
and Limno-Tech, Inc., 2002). The water quality monitoring on dissolved oxygen conducted for
the Springfield Avenue outfall location indicates that the decrease in dissolved oxygen would
also be less than 0.2 mg/L (Limno-Tech, Inc., 2002b). The 0.2 mg/L decrease of dissolved
oxygen would comply with Ecology's definition of an "insignificant depletion." The dissolved
oxygen modeling indicates that impacts to both winter and summer season dissolved oxygen
levels would be slightly less at the Springfield Avenue outfall location than at the Rebecca Street
location (Limno-Tech, 2002b). The near-field dissolved oxygen studies took into consideration
the impact of the upstream discharge from the Inland Empire Paper (IEP) treatment plant. Based
on anticipated waste load discharges from the IEP and Spokane County plants, the combined
dissolved oxygen depletion is projected to be less than 0.2 mg/L.
Ecology is conducting an assessment of far-field dissolved oxygen impacts on the Middle
Spokane River between the Idaho border and Long Lake. The study may lead Ecology to
impose strict effluent limits for biochemical oxygen demand (BOD), ammonia-nitrogen, and
phosphorous. It is anticipated that the level of treatment planned for the new Spokane County
treatment plant would meet these requirements. It is expected that the plant would discharge
lower levels of phosphorous than other plants currently discharging to Middle Spokane River.
Effluent discharge is not expected to violate temperature standards of 20° C for the Spokane
River and should not exceed the allowable incremental increases of 2.0° C and 1.3° for winter
and summer respectively. The effluent would be well below ammonia toxicity levels for aquatic
life. The new treatment plant would use ultraviolet (UV) radiation for disinfection and would
not be adding chlorine to the effluent. Thus there would be no chlorine toxicity impacts.
As noted above, the Spokane River exceeds water quality criteria for lead, cadmium, and zinc.
Because of this, Ecology has developed TMDLs for these metals and has included "performance
based" effluent limits in the NPDES permits for municipal treatment plants. Ecology will
establish similar effluent limits for the County's facility. A preliminary dilution analysis
conducted by Limno-Tech, Inc. indicates that the proposed plant will likely attain water quality
standards for arsenic, copper, chromium, nickel, mercury, and silver (Limno-Tech, 2002a). The
Spokane River at the proposed outfalls exceeds water quality criteria for PCBs. It is anticipated
that the effluent from the new plant would not contain detectable levels of PCBs.
The outfall port would be designed to prevent erosion to the opposite river bank by directing
flows downstream. The opening of the port would be designed to minimize sediment buildup in
the outfall.


December 2002                                                                             Page 3-19
Spokane County WWTP Final Supplemental EIS


Cumulative impacts of the wastewater treatment plant are expected to be positive. The plant
would provide improved wastewater treatment in the Spokane County area improving both
surface and groundwater quality. The new plant would provide wastewater treatment for
expected growth in Spokane County.

Biosolids
No impacts to surface water are expected from the application of biosolids to agricultural lands
because of the strict guidelines associated with the treatment and use of biosolids.

No Action Alternative
Water quality impacts under the No Action Alternative would be significant. If no new
treatment plant were constructed, the County would reach its 10 mgd capacity at the SAWTP by
2007. The County would be unable to provide adequate capacity for projected growth within the
planning area. This could result in fines for violation of water quality standards. Further, if
Spokane County reaches its wastewater treatment capacity limit and new capacity is not
available, a building moratorium would likely be issued. The County would also not have
adequate wastewater treatment capacity to continue its septic tank elimination program. As
discussed in the Groundwater Section of this EIS, this would result in contamination of the
aquifer.
MITIGATION MEASURES

Construction
Erosion and sedimentation control measures suitable for the treatment plant locations,
conveyance routes, and outfall locations would be included as part of project design and
construction to minimize sedimentation. Spokane County would require contractors to:
•   Develop comprehensive erosion and sediment control plans prior to construction for each
    phase of construction. The plans would include elements for site stabilization, slope
    protection, drainageway protection, and sediment retention.
•   Use best management practices for all construction activities to minimize erosion and
    sedimentation impacts.
•   Comply with conditions of the NPDES general permit for construction issued by Ecology.
•   Develop a spill control plan to prevent fuel, chemical, or other pollutant spills from reaching
    any surface water bodies.
•   Implement requirements of the Corps of Engineers permit and WDFW Hydraulic Project
    Approval (HPA) for the in-water work associated with installation of the outfall port.
Operation
The new wastewater treatment facility would be operated in compliance with effluent limitations
set through negotiations with Ecology for the NPDES permit and would not create impacts to
surface water that would require mitigation. Operation of the treatment plant is expected to
prevent potential wastewater problems in the Spokane River and enhance overall water quality in
the region.




Page 3-20                                                                             December 2002
                                                          Spokane County WWTP Final Supplemental EIS



                                  GROUNDWATER
AFFECTED ENVIRONMENT
The Spokane Valley overlies the Spokane Valley – Rathdrum Prairie Aquifer (Spokane Aquifer)
(see Figure 3-2). This is the largest of the numerous groundwater aquifers in the area created by
permeable soils and the glacial history of the Spokane area. The Spokane Aquifer extends from
Lake Pend Oreille through the Spokane Valley. Other aquifers in the area are the Deer Park
Aquifer, the Little Spokane Aquifer, the Green Bluff, Peone Prairie, and Orchard-Pleasant Prairie
Aquifers, and the East Columbia Plateau Aquifer. The latter includes the West Plains Aquifer.

Approximately 120 square miles of the Spokane Aquifer's 320 square miles is in Spokane
County. The aquifer is unconfined, with a seasonally fluctuating water table. Recharge is
primarily through infiltrating rainfall, hillside runoff from surrounding watersheds, leakage from
the Spokane River between Post Falls and Sullivan Road, and leakage from Lake Coeur d'Alene
and numerous other large lakes around the periphery of the Rathdrum Prairie. Groundwater flow
is generally from east to west. Beneath the City of Spokane, the aquifer splits into two channels.
Most of the flow goes north through the Hillyard Trough to the Little Spokane River where it
discharges through numerous springs and seeps. The remaining groundwater flow moves
through a narrow, gravel-filled channel in the bedrock just north of the Spokane River. This
groundwater flow discharges to a section of the Spokane River below Spokane Falls via several
springs and seeps.

The Spokane Aquifer is the primary source of drinking water for more than 400,000 people in
Idaho and Washington. In 1978 the Environmental Protection Agency (EPA) designated the
Spokane Aquifer as a "sole source" aquifer under authority of the Safe Drinking Water Act. A
sole source aquifer is defined as an aquifer that supplies at least 50 percent of the drinking water
to the area overlying the aquifer and in an area where physical, legal, or economic considerations
limit the reliability of an alternative drinking water source (U.S. EPA, 2001). The sole source
designation is intended to protect such aquifers from contamination. The primary mechanism for
protection is the requirement that all proposed federal financially-assisted projects that have the
potential to contaminate the aquifer be reviewed by the EPA. Proposed projects that do not have
any federal funding are not required to be reviewed by EPA.

The Spokane Aquifer is hydraulically connected to the Spokane River. At times the river gains
flow from the aquifer; at other times the aquifer gains flow from the river (see Figure 3-3). The
hydraulic connectivity significantly affects streamflows and the level of the aquifer and can
affect water quality of both the aquifer and the river.

As a result of the hydraulic connectivity, the Spokane River loses large quantities of water to the
Spokane Aquifer. Studies have indicated that more than 140 cfs is lost to the aquifer between
Post Falls Dam and Barker Road, approximately 5 miles east of the Idaho border. Hydraulic
connectivity is most significant during summer low-flow periods. During summer it is estimated
that up to 80 percent of streamflow in the Spokane River is aquifer discharge, whereas in the
winter only 20 percent of streamflow is aquifer discharge (Miller, 1996). Studies have indicated


December 2002                                                                              Page 3-21
Spokane County WWTP Final Supplemental EIS


that on the stretch of river between the Idaho border and the confluence with Latah Creek, the
river can be divided into six reaches based on the amount of water gained or lost to the aquifer
(see Figure 3-3). Reach 1 is the major losing stretch of river in the area. Reach 6 is also a losing
stretch. The amount of water gained or lost from Reach 3 is unknown. Reaches 2, 4, and 5, are
all gaining stretches There is still much uncertainty about the hydrology of the region and the
amount of water exchange that occurs between the river and the aquifer. Ongoing studies
suggest that the connectivity of the river and aquifer is more complex than originally thought.
The ongoing studies suggest that Reach 5 is also a losing reach. However, the designation of
reaches as "gaining" or "losing" is based on average annual conditions. It is likely that at times
during the year, a gaining reach loses water to the aquifer and a losing reach gains water from the
aquifer. The gaining or losing nature of a reach depends on the relative elevation of the aquifer
surface and river surface.

The Rebecca Street outfall alternative is located on Reach 4. This reach has been classified as a
gaining stretch of the river, but more recent evidence suggests that it may be both a gaining and
losing stretch depending on the time of year. During the winter and high streamflows, the stretch
appears to be a losing reach. During the summer the stretch may be gaining and losing
simultaneously with groundwater entering the river from the south and river water entering the
groundwater on the north; the net effect is that the reach is gaining during the summer. Under
these conditions, when river dilution of a waste discharge at this location is the lowest (summer)
the probability of loss to the aquifer is also lowest.

The Springfield Avenue outfall alternative is located on Reach 5. Reach 5 has been classified as
a gaining stretch, but recent evidence suggests that it may be a losing stretch.

The City of Spokane has eight municipal wells that withdraw water from the Spokane Aquifer.
The City has designated wellhead protection zones in the vicinity of the outfall locations (see
Figure 3-4). The protection zones are based on the time of travel to the City's well, thus the
1-year protection zone has a travel time of 1 year to the well. The City has not yet finalized
regulations for protection of the wellhead protection zones.

The Stockyards treatment plant location is located to the east of the wellhead protection zones.
The Alki/Fancher site is located over the narrow finger of the 1-year protection zone. The
Rebecca Street outfall site is located just upstream of a narrow finger of the 1-year protection
zone. It is also upstream of a wider band of 1-year, 10-year, and 5-year zones. During periods
when the river is losing water to the aquifer, some wastewater effluent could be recharged to the
aquifer within the protection zone. The Springfield Avenue outfall site is located just
downstream of the City's wellhead protection zones. It is just upstream of a point where the river
passes through an impermeable basalt area where no groundwater recharge occurs. Therefore,
little if no effluent discharged at this location would be recharged to the aquifer within the
wellhead protection zone.

Water Quality
Because the Spokane Aquifer is unconfined, it can be easily contaminated. Any contamination
poses a threat to the sole source of drinking water for the region. Because of its sole source
aquifer listing, water quality in the Spokane Aquifer has been monitored for over 20 years.

Page 3-22                                                                             December 2002
                  File name: 20062_stretches.ai
NORTH             Original Graphic by: ACT                                                    FIGURE 3-3
                  Edits by:
No Scale
                  Date: 9/25/02                                     GAINING AND LOSING RIVER STRETCHES
                                                  SPOKANE COUNTY REGIONAL WASTEWATER TREATMENT PLANT
           Source: HDR, Inc.
                                                                          SPOKANE COUNTY, WASHINGTON
                        File name: 20062_wellhead.ai
                        Original graphic by: ACT
                                                                         FIGURE 3-4.
      NORTH             Edits by:
                                                        WELL HEAD PROTECTION ZONES
                        Date: 9/26/02
                                                          SPOKANE COUNTY REGIONAL
Source: City of Spokane Comprehensive Plan; 2002.      WASTEWATER TREATMENT PLANT
                                                               SPOKANE, WASHINGTON
                                                        Spokane County WWTP Final Supplemental EIS


During this time, aquifer water quality has generally been good to excellent. There have been
less than 50 violations of drinking water standards. Through the mid-1980s, water quality
declined slightly in terms of inorganic indicators like nitrate-nitrogen and chloride. Nitrate
contamination is of particular concern because it is an indicator that other contaminants that
could impact human health may be present in the groundwater. The decline was attributed to
increased development and associated septic tanks and drainfields and general degradation due to
urbanization. These water quality indicators improved steadily in the late 1980s and 1990s as
sewer construction increased to replace septic tanks and other management strategies for
chemical use and stormwater management were implemented. Septic tanks continue to be a
contributor to local declines in water quality. Other potential sources of groundwater
contamination in the region have been identified and include stormwater injection through dry
wells; chemical storage, transport, and accidental spills; improperly abandoned wells; leakage
from underground pipelines and sewers; over-application and spillage of fertilizers; application
of road de-icing compounds; leakage from above ground or underground fuel storage tanks and
pipelines; improper waste disposal in excavations; sanitary landfills; and gravel pit mining.

Biosolids
Biosolids would be applied to agricultural lands in the County or reclaimed mining sites. in the
County Idaho. Sites selected for biosolids applicationThese agricultural areas would not overlie
the Spokane Aquifer.

IMPACTS

Construction
Construction of the wastewater treatment facilities—treatment plant, conveyance lines, and
outfalls—is unlikely to have significant impacts on groundwater resources or groundwater.
Groundwater could be impacted if dewatering is required, but dewatering is only likely to be
required for construction of the North Valley Interceptor pump station and the outfall.
Dewatering would not be required for construction at either treatment plant location.
Groundwater quality could be impacted if fuels or other pollutants are spilled and seep to the
groundwater table. Groundwater quality could also be impacted if contaminated sites were
encountered and disturbed during construction. As noted in the Environmental Health section of
this document, the previous history of both treatment plant alternatives makes it possible that
contamination could be encountered during construction. It is also possible that contamination
could be encountered along the conveyance routes because of the large number of contaminated
sites in the area of the conveyance routes.

No Action Alternative
Since no construction would occur under the No Action Alternative, there would be no
construction impacts to groundwater.

Operation
Wastewater Treatment Plant Sites
The potential for contamination of groundwater at either of the treatment plant sites is minimal.
Untreated sewage could seep into groundwater from the treatment plants in the event of a spill or

December 2002                                                                            Page 3-25
Spokane County WWTP Final Supplemental EIS


if the plant capacity were exceeded. Seepage of water treatment chemicals stored on site could
also contaminate groundwater if the chemicals are not properly contained. Containment and spill
procedures would be provided where chemicals are stored or loaded. The treatment plant would
comply with all applicable regulations pertaining to chemical storage, containment, and spill
response.

Inflow and Outfall Conveyance
The potential for contaminants along the inflow conveyance routes is also minimal. However, if
leaks in the inflow conveyance pipelines occurred, they could contaminate the aquifer with
untreated sewage. Leakage from the outfall conveyance lines would pose a limited threat to
groundwater quality because the effluent in the outfall pipes would have been treated.

Outfall Options
If the effluent were discharged to a losing stretch of the Spokane River that recharges to the
wellhead protection zones, there would be a potential for discharged effluent to contaminate the
groundwater aquifer that supplies the City of Spokane. Since the Springfield Avenue outfall
location is located downstream of the wellhead protection zone and just upstream of a section of
basalt where no water loss to groundwater occurs, little or no effluent discharged from this
outfall would be expected to contaminate City wells.

The Rebecca Street outfall is located upstream of the City's designated wellhead protection zone.
Consequently, if groundwater recharge occurs along this stretch of the river, a portion of the
effluent could eventually reach the City wells. The amount of effluent reaching the wells and the
amount of dilution that would occur from other water sources would be dependent on the
streamflow in the river, the amount of recharge occurring within the wellhead protection zone,
and the ability of the aquifer to diffuse contaminants.

To address concerns about the potential impacts of the outfall at Rebecca Street, the County is
conducteding a risk assessment for contaminants of concern as part of a groundwater study
(HDR, 2002). At the time of this draft Supplemental EIS, the groundwater study is still under
development. The groundwater study is scheduled for completion prior to issuance of the Final
Supplemental EIS and results of the study will be provided at that time. The risk assessment will
be considereding the level of treatment that would be provided at the new treatment plant; the
level of dilution and mixing in the river between the outfall and the wellhead protection zone; the
amount of contaminant removal that would occur in the river prior to recharge; the amount of
recharge that would occur from the river to groundwater; the amount of dilution that would occur
in the groundwater; the contaminant reduction that would occur as water passes through the
aquifer soil matrix; and the impact of the City's chlorination practice on the formation or removal
of contaminants. The risk assessment will be useding conservative assumptions intended to
over-predict the concentration of constituent contaminants in the potable water supply.
Preliminary rResults of the risk assessment seem to indicate that there would be little to no
impact to the groundwater from toxics, nitrate, Giardia, Cryptosporidium, trihalomethanes, or
haloacetic acid. The modeling results indicate that the proposed discharge is not projected to
significantly increase public health risk provided that the aquifer attenuates viral contamination.
No modeling has been done to predict the attenuation in the Spokane Aquifer. However, the
most relevant comparison study of the Missoula Aquifer (Montana) found adequate viral


Page 3-26                                                                            December 2002
                                                          Spokane County WWTP Final Supplemental EIS


attenuation in 140 feet of aquifer travel. In the Spokane Aquifer, the travel distance is 4,000 feet
between the river and wells which is anticipated to provide adequate viral attenuation.

The cumulative impacts of the wastewater treatment plant on groundwater are expected to be
positive. Potential contamination from anticipated growth in Spokane County would be reduced
because wastewater treatment would be provided.

Biosolids
Because of the stringent guidelines for biosolids management, no impacts are anticipated to
groundwater from application of biosolids to agricultural or reclaimed mining sites.lands in the
County.

No Action Alternative
Under the No Action Alternative, the County would not be able to continue its Septic Tank
Elimination Program. As described in Chapter 1 of this Supplemental EIS, the reduction of
septic tanks in the County has reduced the potential for groundwater contamination. If the
program were not continued, declines in groundwater quality of the Spokane Aquifer could result
from septic tank leakage. This contamination could include nitrates, phosphates, disease-causing
bacteria, viruses, and other microorganisms.
MITIGATION MEASURES

Construction
Mitigation measures to minimize construction impacts to groundwater would include those
described in the Surface Water section of this EIS. In addition, if dewatering is required at the
outfall, contractors would be required to meet the following mitigation measures:

• Collect the dewatering water from excavations and drain it to a stormwater treatment and
  collection system before discharge.
• Develop a dewatering plan to monitor groundwater withdrawal and avoid groundwater
  contamination.
 Develop construction specifications that require monitoring for contaminated soil during
  excavation activities and for proper handling and disposal of contaminated soil if encountered.
• Require monitoring of on-site soils for contamination and mitigateMitigate and address
  contaminated soilssites in accordance with local, state, and federal regulations if encountered
  during construction.
Operation
There is a potential for contamination of the aquifer from effluent discharge to the Spokane
River. The potential would be minimized by the high level of treatment proposed for the
wastewater treatment plant and the high water quality standards being imposed for the effluent.
Preliminary modeling indicates that the proposed treatment process would reduce contaminants
of concern to levels below those that would pose public health risks. At the Rebecca Street
alternative, there is a potential that virus concentrations would not be attenuated in the Spokane
Aquifer prior to reaching the City of Spokane wells. If the Rebecca Street outfall is selected, the
County will conduct periodic monitoring to assess the risk to City wellswhether effective viral
attenuation is occurring in the Aquifer. If it is determined that unacceptable concentrations of

December 2002                                                                              Page 3-27
Spokane County WWTP Final Supplemental EIS


viruses could reach are present at the City's wells, the chlorine contact facilities at the wells
could be expanded to inactivate the viruses.

Construction of new wastewater facilities in the County would allow the County to continue its
Septic Tank Elimination Program to prevent aquifer contamination from continued use of septic
tanks. This would result in an overall improvement of groundwater quality as septic tanks are
decommissioned.




Page 3-28                                                                                December 2002
                                                         Spokane County WWTP Final Supplemental EIS



                        ENVIRONMENTAL HEALTH
The following section describes the existing environment related to noise and hazardous
materials and discusses potential impacts that could occur with the construction and operation of
the proposed wastewater treatment plant system.
AFFECTED ENVIRONMENT

Noise Overview
The human ear responds to a wide range of sound intensities. The decibel scale used to describe
sound is a logarithmic rating system that accounts for the large differences in audible sound
intensities. This scale accounts for the human perception of a doubling of loudness as an
increase of 10 decibels (dBA). Hence, a 70 dBA sound level will sound twice as loud as a 60
dBA sound level. People generally cannot detect differences of 1 dBA; under ideal laboratory
conditions, differences of 2 or 3 dBA can be detected. A 5 dBA change would be expected to be
perceived under normal conditions. Table 3-3 shows representative sounds and corresponding
noise levels produced in decibels. Note that both the subjective evaluations and the
physiological responses are continuums without true threshold boundaries. Consequently, there
are overlaps among categories of response that depend on the sensitivity of the noise receivers.

When addressing the effects of noise on people, it is necessary to consider the frequency
response of the human ear. Instruments are therefore designed to respond to or ignore certain
frequencies. The frequency-weighting most often used is A-weighting; measurements from
instruments using this system are reported in “A-weighting decibels” or dBA. All sounds in this
discussion are reported in dBA.

Factors affecting the impact that a given noise will have on a person include frequency and
duration of the noise, the absorbency of the ground and surroundings, and the distance of the
receptor from the noise source. The receptor and the usual background noise levels also
determine the degree of impact.

Relevant Local, State, and Federal Noise Standards and Guidelines.
Spokane County follows the State of Washington noise regulations (WAC 173-60). Table 3-4
shows the maximum permissible environmental noise levels based on the EDNA of a particular
noise source. EDNA is defined as “the Environmental Designation for Noise Abatement, being
an area or zone (environment) within which maximum permissible noise levels are established.”

State noise limits vary depending on the Environmental Designation for Noise Abatement
(EDNA) of the noise source and the receiving property (Table 3-4). The limits apply at the
property line. Class “A” covers residential uses, Class “B” covers commercial uses, and Class
“C” covers all other uses on developed land.

Spokane County has also established restrictions on noise during nighttime hours. The Spokane
County Code (SCC) restricts construction activities to the hours between 7 a.m. and 10 p.m.
during which time construction noise(s) are exempt from the provisions of SCC Section 6.10.010
– Noise Disturbances Prohibited (SCC Section 6.12.020 – Exemptions).

December 2002                                                                             Page 3-29
Spokane County WWTP Final Supplemental EIS




             Table 3-3. Sound Levels Produced by Common Noise Sources

                                                                                    Possible
                                                       Sound       Subjective
            Thresholds/Noise Sources                                               Effects on
                                                     Level (dBA)   Evaluations
                                                                                    Humans
  Carrier jet takeoff (50 ft)                           140
  Siren (100 ft)
                                                        130
     Loud rock band
  Jet takeoff (200 ft)                                              Deafening
                                                        120
     Auto horn (3 ft)
                                                                                 Continuous
  Chain saw                                                                      exposure can
                                                        110
    Noisy snowmobile                                                             cause hearing
  Lawn mower (3 ft)                                                              damage
                                                        100
    Noisy motorcycle (50 ft)
                                                                    Very Loud
  Heavy truck (50 ft); bulldozer or backhoe
                                                         90
  (100 ft)
  Pneumatic drill (50 ft); loader (100 ft)
                                                         80
  Busy urban street, daytime
                                                                      Loud
  Normal automobile at 50 mph; Vacuum
                                                         70
  cleaner (3 ft)                                                                 Speech
  Large air conditioning unit (20 ft)                                            Interference
                                                         60
  Conversation (3 ft)
                                                                    Moderate
  Quiet residential area; Light auto traffic
                                                         50                      Sleep
  (100 ft)
                                                                                 Interference
  Library; Quiet home                                    40
                                                                      Faint
  Soft whisper (15 ft)                                   30
  Slight Rustling of Leaves                              20
                                                                                 Minimal Effects
  Broadcasting Studio                                    10         Very Faint
  Threshold of Human Hearing                             0
 Source: US Environmental Protection Agency, 1971.


The City of Spokane also follows the State of Washington Maximum Permissible
Environmental Noise Levels (Table 3-4) and has restrictions on noise levels during specific
time periods:

        No person may make or permit any unnecessary or unusual noise between the
        hours of 6 a.m. and 10 p.m. to the annoyance of others. No person may make or
        permit, in the operation of a machine, in the harboring of an animal or otherwise,
        any noise between the hours of 10 p.m. and 6 a.m. to the annoyance of any other
        person of ordinary sensibilities (Spokane Municipal Code, 10.08-020 – Noise).




Page 3-30                                                                             December 2002
                                                          Spokane County WWTP Final Supplemental EIS


            Table 3-4. Maximum Permissible Environmental Noise Levels

                    EDNA of Noise
                       Source                   EDNA of Receiving Property

                                             Class A        Class B         Class C

                 Class A                     55 dBA          57 dBA         60 dBA
                 Class B                       57              60             65
                 Class C                       60              65             70
                Source: WAC 173-60-040


Noise sources in the vicinity of the proposed wastewater treatment plant sites, conveyance
corridors, and outfalls are associated with medium-density residential, commercial, retail, and
light-industrial establishments. The Interstate 90 (I-90) corridor traverses the middle of the City
of Spokane and contributes to the ambient noise levels in the vicinity. There are two major
railroad corridors through the project vicinity. More than 50 trains per day use the rail corridors
and are a major source of noise in the area.

Hazardous Materials Overview
Hazardous materials are normally classified into different categories based on laws and
regulations that define their characteristics and use, such as the following: hazardous waste,
dangerous waste, hazardous substances, and toxic substances.

The U.S. Environmental Protection Agency (EPA) and Washington State Department of Ecology
(Ecology) maintain databases that track sites with potential and confirmed releases of chemicals
to the environment, and facilities that manage hazardous materials.

The Federal Resource Conservation and Recovery Act (RCRA) defines what constitutes
hazardous waste. EPA tracks hazardous waste management at individual facilities based on
notification requirements and records that define the level of waste, define the type of handling
performed, or identify if a release to the environment has occurred.

The Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA), also
known as Superfund, defines hazardous substances. The Model Toxics Control Act (MTCA) is a
parallel program operated by Ecology, which addresses the release and clean up hazardous
substances. releases of petroleum products not covered under the federal statutes. These two
programs provide appropriate regulation concerning the release of hazardous substances to the
environment.

Toxic substances, a subset of hazardous materials regulated by the federal Toxic Substances
Control Act (TSCA), are also tracked by EPA. TSCA evaluates all new chemical substances and
existing chemicals put to new uses, other than pesticides, for health and environmental effects.
Additional controls governing disposal, beyond CERCLA and RCRA, have been specifically
applied to polychlorinated biphenyls (PCBs).



December 2002                                                                              Page 3-31
Spokane County WWTP Final Supplemental EIS


The discussion is based primarily on a review of available information on hazardous materials
and contaminations. Sources included:

•   Hazardous Site List (Ecology, September 30, 2002)
•   Leaking and Underground Storage Tanks (LUST) database (Ecology, September 30, 2002)
•   Confirmed and Suspected Contaminated Sites (CSCS) report (Ecology, September 30, 2002)
•   EPA’s Envirofacts Data Warehouse and Applications Web site located at
    http://www.epa.gov/enviro/index_java.html

The EPA's Envirofacts Web site was accessed on September 26, 2002. The Comprehensive
Environmental Response Compensation and Liability Information System (CERCLIS) database
and National Priorities List database were accessed through links at this site. No contaminated
sites in the project area were identified.

Ecology's Hazardous Site List, Leaking and Underground Storage Tanks (LUST), and
Confirmed and Suspected Contaminated Sites report were searched (for potential contaminated
sites) via Ecology's Web site. Numerous contaminated or potentially contaminated sites were
identified in locations adjacent to or in the vicinity of the project sites, conveyance routes, and
pump station/outfall locations. Identified locations include underground storage tanks,
hazardous waste generators, contaminated sites, and voluntary cleanup sites.

Stockyards Alternative
Project Site
Because the Stockyards Alternative site is surrounded by light- to heavy-industrial and
commercial businesses, noise arises from specific sources in the vicinity of this site. The
greatest source of frequent noise at this site is from freight trains using the nearby Burlington
Northern Santa Fe (BNSF) railroad tracks. Traffic along the adjacent roadways, including North
Freya Way, Freya Street, East Boone Avenue, and North Havana Street, also generates noise
within the immediate vicinity of the site. North Freya Way is elevated adjacent to the site and
generates considerable traffic noise. Due to the proximity of the site to Felts Field Municipal
Airport (located approximately one mile northeast of the site), noise from small aircraft is also
noticeable.

With the past land use along the BNSF, Northern Pacific, and Spokane International rail lines,
the potential exists for hazardous materials to be located near these rail line corridors at the
project site. Hazardous materials (such as asbestos, lead-based paint, and electrical equipment
containing PCBs) could be located along the rail line properties. There is a moderate potential
for hazardous materials contamination of the Stockyards project site itself due to its industrial
setting.




Page 3-32                                                                              December 2002
                                                          Spokane County WWTP Final Supplemental EIS


Inflow Conveyance
Traffic is the greatest contributor to noise in the vicinity of all three proposed conveyance routes.
Train and aircraft noise also contribute to the ambient noise in the immediate areas. Traffic
noise is intensified along the Havana Street inflow route due to its close proximity to I-90. The
street also experiences a significantly higher volume of traffic compared to the other arterials and
roads. The Havana Street option also passes by the Spokane Interstate Fairgrounds, which
contributes to noise levels in the area during events.

Contaminated sites may exist along conveyance corridors that could warrant the need for site
cleanup, especially along rail lines, gas station sites, or other industrial properties. These sites
would likely be located adjacent to conveyance routes and outside street rights-of-way where the
majority of conveyance routes would be located.

Outfall Conveyance
For both the Rebecca Street and Springfield Avenue options, the major source of noise along the
alignments would be from automotive traffic along the rights-of-way. Other sources of noise
along both alternative conveyance alignments include trains utilizing the BNSF, Spokane
International, and Northern Pacific railroad lines; and aircraft using nearby Felts Field Municipal
Airport.

The potential for contaminated sites would be the same as described for Stockyards inflow
conveyance.

Alki/Fancher Alternative
Project Site
Noise sources at the Alki/Fancher site are similar to the Stockyards site regarding traffic and
aircraft noise. Felts Field Municipal Airport is located approximately one mile north of the site.
Freight trains traveling along the Northern Pacific Railroad and traffic along the adjacent
roadways (East Broadway Avenue and North Fancher Road) are the greatest noise sources in the
vicinity of the Alki/Fancher site. Other noise sources at this site include loading and unloading
of vehicles from railcars and trucks at the automobile distribution center on the Alki/Fancher
site. Events at the Spokane Interstate Fairground are another source of noise immediately to the
east of the Alki/Fancher site.

The potential for hazardous materials at the Alki/Fancher site is moderate to high due to the
confirmed presence of contamination and subsequent clean-up activities on nearby properties.

Inflow Conveyance
Similar to the Stockyards Inflow Conveyance routes, the greatest sources of noise along the
Alki/Fancher Inflow routes are automobiles and trains, with occasional aircraft noise from the
nearby Felts Field Municipal Airport. Traffic noise is intensified at the Fairgrounds route, which
begins near I-90. Aircraft noise is noticeable along the Fancher Road route since Felts Field
Municipal Airport is directly north of East Utah Avenue.

Hazardous materials impacts would be the same as described for Stockyards inflow conveyance.


December 2002                                                                               Page 3-33
Spokane County WWTP Final Supplemental EIS


Outfall Conveyance
Noise from vehicular traffic, freight trains and aircraft are found along both the Havana Street
and Broadway Avenue options. Hazardous materials impacts would be the same as described for
Stockyards inflow conveyance.

Outfall Options
Although not heavily traveled, automobile traffic along the adjacent roadways, North Rebecca
Street and East Ermina Avenue, is the major source of noise at the proposed Rebecca Street
outfall site. Voices from people recreating in and along the Spokane River contribute to noise at
this site.
Similar to the Rebecca Street Outfall option, automobile traffic is the major noise source in the
vicinity of the Springfield Avenue outfall. Watercraft in the Spokane River could also contribute
to noise in the vicinity of the Springfield Street Outfall site.
The potential for contaminated sites would be the same as described for Stockyards inflow
conveyance.
IMPACTS

Construction
Stockyards Alternative
Project Site. Short-term impacts related to noise would include excavation activities and
machinery (i.e., pile drivers), heavy trucks, and workers' vehicles at the Stockyards site.
Excavation activities would have the greatest impact to noise levels in the vicinity of the
treatment plant construction. Excavation could include jackhammering, digging and scraping of
the concrete and soil by heavy machinery, and dumping of excavated materials into the beds of
heavy trucks for removal from the construction site. Occupants of adjacent properties and
motorists on adjacent roadways (North Havana Street, East Boone Avenue, and North Freya
Street) would unavoidably be exposed to construction noise throughout the project duration.
Construction activities could last up to 2.5 years for the construction of a new treatment facility
with excavation activities occurring during the initial phase of construction.
An analysis of hazardous databases listed under the Hazardous Materials Overview section
revealed no presence of contamination at the Stockyards site. However, Bbefore construction
commences at the project site, Spokane County would conduct a Level 1 Site Assessment prior
to purchase of the site to verify the level of site contamination, if any. If hazardous materials are
found to be located on site as a result of past use along the rail lines, hazardous materials could
be exposed as a result of construction activities. During construction, precautions would be
taken to minimize the risk of release of contaminated materials into the environment. If sites are
found to be contaminated, appropriate measures would be implemented to initiate hazardous
materials cleanup.
Inflow Conveyance. Noise impacts associated with construction along the Stockyards Inflow
Conveyance routes, including pump stations, would result in short-term noise impacts to
surrounding properties. Noise sources would include heavy trucks and machinery, workers'
vehicles, and voices. Construction along the conveyance corridors would be open-cut; therefore,
noise impacts would be substantial in the construction area where the pipe is installed. The

Page 3-34                                                                              December 2002
                                                         Spokane County WWTP Final Supplemental EIS


impacts to any given section would be temporary and short in duration, as construction activities
would shift along the length of the route rather than remain in a single area. Construction of the
pipeline along the Trent Avenue route would create more noise impacts than the other routes
because it is the longest of the proposed Stockyards Inflow Conveyance routes and the associated
construction duration, and because East Trent Avenue experiences greater traffic along this
alignment affecting considerably more people. The Julia Street and Havana Street options are
both relatively short, reducing noise impacts along those routes. Noise impacts are therefore not
expected to be significant.

Hazardous materials impacts would be the same as described for Stockyards inflow conveyance.
could be located along the inflow conveyance corridor, and could be exposed during
construction.

Outfall Conveyance. Noise impacts associated with construction of pipelines along the
Stockyards Outfall Conveyance routes would be similar to those discussed for the Inflow
Conveyance routes. Construction of the Springfield Avenue option would contribute noise
impacts to a greater number of individuals compared to the Rebecca Street option since the route
is significantly longer in distance and passes . Commercial and industrial businesses would be
the most affected. However, the Rebecca Street option would pass by more residential homes,
offices, and retail areas. Commercial and industrial businesses would be the most affected.

Hazardous materials impacts would be the same as described for Stockyards inflow conveyance.

Alki/Fancher Alternative
Project Site. Noise impacts from construction activity at the Alki/Fancher site would be similar
to those discussed under the Stockyards Alternative above. Motorists traveling along East
Broadway Avenue, North Koren Street, East Alki Avenue, and North Fancher Road would be
most susceptible to construction noise.

Although the Alki/Fancher site is not listed in any hazardous databases, Tthe potential
probability for encountering hazardous materials at the Alki/Fancher site is high due to the
confirmed presence of contamination and subsequent clean-up activities on nearby properties.

Inflow Conveyance. Noise impacts would be generally the same as those discussed for the
Stockyards Inflow Conveyance corridors.

Hazardous materials impacts would be the same as described for Stockyards inflow conveyance.

Outfall Conveyance. Noise impacts associated with the construction of the Alki/Fancher
Outfall Conveyance options would be similar to those described above for the Stockyards Inflow
Conveyance. Construction of the Havana Street option would create more noise impacts than the
Broadway Avenue option since the proposed alignment is longer and would pass by residential
homes, offices, and retail areas along East Springfield Avenue.

Hazardous materials impacts would be the same as described for Stockyards inflow conveyance.



December 2002                                                                             Page 3-35
Spokane County WWTP Final Supplemental EIS


Outfall Options
Noise impacts generated from construction activity at both the proposed Rebecca Street and
Springfield Avenue Outfall locations would be temporarily significant since installation of the
outfall port would include the operation of heavy construction machinery, including backhoes
and excavators. The noise generated by this equipment would be highly noticeable in these quiet
settings. Outfall construction would last up to 12 weeks.

The potential for encountering hazardous materials at the outfall locations along the river is
lower because of limited development adjacent to the river.

No Action Alternative
Under the No Action Alternative, no construction-related noise impacts would occur.

Operation
Stockyards Alternative
Project Site. No significant noise impacts from plant operations are anticipated since equipment
generating significant noise would be enclosed or shrouded in sound attenuation structures.

Long-term noise impacts associated with operation of the wastewater treatment plant would
include heavy trucks for biosolids pick-up and disposal, on-site machinery, workers’ vehicles,
septage trucks, and voices. Because biosolids would be removed from the treatment plant site on
a daily basis, and four to six times a day during Phase 2, noise from heavy trucks would occur
approximately three to four times per day. However, the trucks are not expected to add
substantially to noise in the vicinity of the treatment plant alternatives since significant noise
sources exist in the area (trains, traffic, and aircraft).

Noise impacts from emergency generators are expected to be negligible since the generators
would only be used during major emergencies.

The potential for spills and leaks of hazardous materials at the wastewater treatment facility,
along the conveyance corridors, and at the outfall location during operation is low. Operation of
the wastewater treatment system is not likely to cause significant impacts because the potential
for spills and leaks during normal wastewater processing is low and would be managed using
BMPs. Handling of hazardous materials and on-site storage would be compliant with all
applicable state and federal regulations.

Conveyance Routes and Pump Stations. Because the conveyance pipelines would all be
located underground along the conveyance corridors, no noise would be generated and no noise
impacts would occur. Some noise would be generated at pump stations; however, it is expected
to be minimal. Pump stations would include mitigating features to minimize or eliminate noise.
However, the engine generator for standby power would produce low to moderate noise when it
operates.




Page 3-36                                                                             December 2002
                                                           Spokane County WWTP Final Supplemental EIS


Alki/Fancher Alternative
Project Site. Noise impacts as a result of operation of a wastewater treatment plant at the
Alki/Fancher site would be the same as described above for the Stockyards Alternative.

Hazardous materials operation impacts would be the same as described for Stockyards inflow
conveyance.

Conveyance Routes and Pump Stations. Noise impacts would be the same as those discussed
for the Stockyards Conveyance Corridors above.

The potential for spills and leaks of hazardous materials would be the same as described for the
Stockyards site.

Outfall Options
Noise impacts as a result of operation of both proposed Rebecca Street and Springfield Street
Outfall locations are expected to be minimal and would be limited to visits by facility staff to
conduct routine maintenance. No adverse impacts to noise are expected as a result of operation
of this proposed outfall.

Effluent released at the outfall would be treated to meet water quality standards, therefore no
release of hazardous materials would be expected under normal operating conditions. For
normal operations, discharges to the wastewater system would be limited by the Spokane County
Code (Title 8, Health and Sanitation) that regulates the types of materials that can be discharged
to the sewer system including dangerous wastes (chapter 173-303WAC) and other hazardous
materials. In the event of a treatment plant failure, untreated or partially treated effluent could be
discharged to the river and could contain constituents that exceed discharge limits and may not
meet water quality standards.hazardous materials. With its many redundant systems, failure of
the plant is unlikely.

No Action Alternative
Under the No Action Alternative, noise levels at all sites and along the conveyance routes could
be expected to increase slightly with additional urban development expected at these locations.

No impacts to contaminated sites would occur. No new hazardous materials would be
introduced at any alternative or system component location under the No Action Alternative. No
potentially-contaminated areas would be disturbed.

MITIGATION MEASURES

Construction
Noise
Mitigation measures to minimize noise impacts as a result of construction would include the
following:




December 2002                                                                               Page 3-37
Spokane County WWTP Final Supplemental EIS


•   Construction activities would occur between permitted construction hours (6 a.m. to 10 p.m. in
    the City of Spokane, and 7 a.m. to 10 p.m. in Spokane County).
•   Modern construction equipment, including vehicles and machinery, would be used throughout
    the duration of construction.
•   Muffler systems on heavy construction equipment would be maintained in good working order
    to ensure maximum noise attenuation.

Hazardous Materials
Mitigation measures that would be implemented to minimize adverse effects of hazardous
materials would include:

•   Level 1 assessment of potential hazardous materials located within the proposed sites prior to
    construction.
•   Conveyance route-specific inventories would be conducted to identify contaminated or
    potentially contaminated sites adjacent to pipeline construction areas.
•   If sites are found to be contaminated, appropriate measures would be implemented to initiate
    hazardous materials cleanup.
•   Hazardous materials spill prevention plan that would be compliant with federal, state, and local
    regulations.
•   During construction, precautions would be taken to minimize the risk of release of
    contaminated materials (if any) into the environment.

Operation
Noise
Mitigation measures that would be implemented to reduce adverse noise impacts during the
operation of the wastewater treatment system include:

•   Maintaining facility vehicles and biosolids trucks in good working order.
•   Emergency generator testing would be scheduled so as to minimize noise impacts to
    surrounding properties.
•   Ensuring sound-attenuating structures including buildings and other measures are maintained
    in good working condition and effectively reduce noise impacts.

Hazardous Materials
•   Proper handling of hazardous materials on-site to comply with applicable state and federal
    standards and regulations.
•   Develop a spill prevention and response plan.
•   In the event of a spill of untreated effluent to the Spokane River, post signs notifying the public
    that it is unsafe to come in contact with the water, sediment or debris.
•   The County will remove contaminated materials from the river area, as required.




Page 3-38                                                                              December 2002
                                                            Spokane County WWTP Final Supplemental EIS



                                 PLANTS AND ANIMALS
AFFECTED ENVIRONMENT

Stockyards Alternative
Plants
The Stockyards Alternative site is highly disturbed and heavily covered with concrete.
Vegetated areas are populated with non-native grasses and noxious weeds (URS Corporation,
2001).

Site conditions such as designated habitat, riparian critical areas, and vegetation complexes were
evaluated during a site visit on May 14, 2002. Supporting information for these evaluations
included United States Department of Fish and Wildlife Service aquatic and terrestrial species
lists; Washington Department of Fish and Wildlife maps, digital information, and species of
concern lists; Washington Natural Heritage Program rare plant species lists; Washington
Department of Natural Resources endangered, threatened, and sensitive vascular plants of
Washington; and Spokane County Critical Habitat designation. Site vegetation was in spring
flush at the time of site reconnaissance, and no federal, state, or local plants listed as sensitive or
of concern were identified after walking a 50 foot grid (URS Corporation, 2001).

All of the conveyance routes have been disturbed. Any remaining vegetation consists of weedy
or landscape species. Vegetation at the outfall sites consists of weedy and native riparian plants.

Animals
Project Site. No threatened or endangered animal species were observed on the Stockyards site
during the May 14, 2002 site reconnaissance. An osprey nest was observed on a power pole on
the west end of the property, but was in deteriorated condition and did not show signs of recent
use, although there were reports of osprey activity on the nest in early 2002. Ospreys usually
arrive on the breeding grounds in late March or early April and lay two to three eggs in late
April. No evidence of nest building or maintenance was observed within the area at the time of
the site visits in May 14, 2002 and the nest was observed to be further deteriorated during a site
visit in August 2002 (URS Corporation, 2001; Adolfson Associates, 2002).

According to WDFW data (2001), a merlin nest is located approximately 1.5 miles to the west of
the site and an osprey nest is located approximately 2 miles to the east of the site.

Information provided by the US Fish and Wildlife Service (USFWS, 2002) indicated that bald
eagles (Haliaeetus leucocephalus), a threatened species, could be present on or near the project
site. No evidence of their presence on the project site was found during an August 2002 site
visit. (Adolfson Associates, 2002). There are no suitable nest or perch trees in the area of the
Stockyards Alternative site.

A marmot was observed on the site during the August 2002 site visit. A den was not located
(Adolfson Associates, 2002).


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Spokane County WWTP Final Supplemental EIS


Inflow Conveyance. Information provided by the US Fish and Wildlife Service (USFWS,
2002) indicated that bald eagles (Haliaeetus leucocephalus), a threatened species, could be
present on or near the conveyance routes. No evidence of their presence along any of the routes
was found during an August 2002 site visit (Adolfson Associates, 2002). No other endangered,
threatened, or candidate species are known to exist along any of the inflow conveyance routes for
the Stockyards Alternative.

Outfall Conveyance. According to WDFW data (2002), a merlin nest is located approximately
0.5 miles north of the Stockyards Alternative's Springfield Street conveyance option where this
route approaches the Springfield Street Outfall.

Alki/Fancher Alternative
Plants
The Alki/Fancher site is located immediately north of an active railroad; the entire auto-transfer
lot parcel under study may be within the railroad right-of-way. Development of the railroad bed
may have had a significant impact on the site and its current condition by removing all ground
cover for construction of the railbed, changing the structure and ecological characteristics of the
area. Approximately 60 percent of the site is covered with pavement or concrete. The existing
ground cover consists of non-native vegetation, sages, noxious weeds, and asphalt access roads
(URS Corporation, 2001).

Plants along conveyance routes and outfall locations are the same as described for the Stockyards
Alternative.

Animals
Project Site. No threatened or endangered animal species were observed on the Alki/Fancher
site during a May 14, 2002 site reconnaissance.

Information provided by the US Fish and Wildlife Service (USFWS, 2002) indicated that bald
eagles (Haliaeetus leucocephalus), a threatened species, could be present on or near the project
site. No evidence of their presence on the project site was found during an August 2002 site visit
(Adolfson Associates, 2002). There are no suitable perch or nesting trees in the area of the
Alki/Fancher Alternative site.

According to WDFW data (2002), an osprey nest is located approximately 1 mile east of this site
and was last occupied in 1991. Another nest is located approximately 3 miles to the northeast
and was last occupied in 1998. A merlin nest is located approximately 2 miles west of this site
(WDFW, 2001).

Inflow Conveyance. Information provided by the US Fish and Wildlife Service (USFWS,
2002) indicated that bald eagles (Haliaeetus leucocephalus), a threatened species, could be
present on or near the conveyance routes. No evidence of their presence along any of the routes
was found during an August 2002 site visit (Adolfson Associates, 2002). No other endangered,
threatened, or candidate species are known to exist along any of the inflow conveyance route for
the Alki/Fancher Alternative.


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                                                        Spokane County WWTP Final Supplemental EIS


According to WDFW data (2002), an osprey nest is located approximately 0.75 mile to the east
of Alki/Fancher Inflow conveyance Fancher Road option.

Outfall Conveyance. According to WDFW data (2002), a merlin nest is located approximately
0.5 miles north of the Alki/Fancher Alternative's Broadway Avenue conveyance option, where
this route approaches the Springfield Street Outfall.

Rebecca Street Outfall
According to WDFW data (2002), a merlin nest is located approximately 1.5 miles downstream
of this outfall location.

Prior to the construction of the Grand Coulee Dam, several types of anadromous fish migrated
through the Spokane River and spawned in the river and its tributaries. Access to the Spokane
River has been blocked since the 1940s. Consequently, there are no threatened or endangered
anadromous fish in the project area. The chinook and kokanee salmon in the list below are
present in the Spokane River due to entrainment from the Lake Couer d’Alene fishery (National
Marine Fisheries Service, 2002). The Washington Department of Fish and Wildlife’s (WDFW)
Priority Habitats and Species (PHS) maps from the Spokane River near the Rebecca Street
Outfall indicate that the Spokane River is a priority habitat for rainbow trout, a resident fish
(WDFW, 2002).

Consultation with the United States Fish and Wildlife Service (USFWS) indicates there are no
threatened or endangered fish species present in the Spokane River (USFWS, 2002).

Other resident fish are also present in the Spokane River and are likely found near the Rebecca
Street Outfall site. These fish species include:

        •   speckled dace                  •   redside shiner
        •   northern pikeminnow            •   longnose sucker
        •   largescale sucker              •   cutthroat trout
        •   rainbow trout                  •   chinook salmon
        •   kokanee salmon                 •   brown trout
        •   brook trout                    •   brown bullhead
        •   yellow perch                   •   pumpkinseed sunfish
        •   largemouth bass

Springfield Avenue Outfall
According to WDFW data (2002), a merlin nest is located approximately 0.5 miles upstream of
this outfall.

Fish presence near the Springfield Avenue Outfall in the Spokane River would be similar to
those documented in the Rebecca Street Outfall option discussion.




December 2002                                                                            Page 3-41
Spokane County WWTP Final Supplemental EIS


Biosolids
Biosolids application sites would primarily be agricultural fields that have been tilled for
farming. The biosolids would be used as a soil amendment and fertilizer. Some of the biosolids
may be used in reclamation of mining sites, improving conditions for plants and animals.

IMPACTS

Stockyards Alternative
Plants
No impacts to plants would occur as the existing vegetation on the project site and conveyance
routes is sparse and consists of ornamental and weedy species. No federal, state, or local plants
listed as sensitive or of concern are present in the Stockyards Alternative.

No critical areas are located on the Stockyards Alternative site according to Spokane County's
Critical Areas Ordinance (Spokane County Code 11.20) (Spokane County, 1996).

Animals
Project Site. Construction activities may affect urban wildlife species (e.g., pigeons, small
mammals) present on the site. These species are likely to relocate to other areas and may return
to the treatment plant location following construction. No endangered, threatened, or candidate
species are located on or in close proximity to the Stockyards site, therefore no negative impacts
to those species are expected as a result of construction activities. No negative operation-related
impacts are expected to occur. No impacts to osprey or merlin nesting is expected to occur as a
result of construction or operation because they are located over 1 mile from the project site.
The osprey nest on-site is degraded and unlikely to be reused, but the County will relocate the
nest to a more appropriate location.

Inflow and Outfall Conveyance. Because of the distance between construction areas and
nesting areas of merlin and osprey in the area, and the urban location of these nests, no negative
impacts are expected to occur as a result of construction of any of the Stockyards inflow and
outfall conveyance routes.

Alki/Fancher Alternative
Plants
No impacts to plants would occur as the existing vegetation on the site is sparse and consists of
weedy species. No federal, state, or local plants listed as sensitive or of concern are present on
the Alki/Fancher Alternative.

No critical areas are located on the Alki/Fancher Alternative site according to Spokane County's
Critical Areas Ordinance (Spokane County Code 11.20) (Spokane County, 1996).

Animals
Project Site. No endangered, threatened, or candidate species are located on or in close
proximity to the Alki/Fancher site, therefore no negative impacts to these species are expected as
a result of construction activities. No negative operation-related impacts are expected to occur.


Page 3-42                                                                             December 2002
                                                          Spokane County WWTP Final Supplemental EIS


Inflow and Outfall Conveyance. Because of the distance between construction areas and
nesting areas of merlin and osprey in the area, and the urban location of these nests, no negative
impacts are expected to occur as a result of construction of any of the Alki/Fancher inflow and
outfall conveyance routes.

Rebecca Street Outfall
Plants
A mix of non-native, weedy, and native plant species are present along the bank of the Rebecca
Street Outfall location. This vegetation would be removed along the trench for the outfall during
construction. The trench area would be replanted following construction.

Animals
Because of the distance between construction areas and nesting areas of merlin in the area, and
the urban location of these nests, no negative impacts are expected to occur as a result of
construction of the Rebecca Street Outfall.

Fish
Several freshwater fish species are known to occur in the Spokane River. Outfall construction
activities would result in temporary impacts to fish habitat and species throughout the duration of
outfall installation. In-water construction activities would likely occur during summer low flow
months and would last approximately 4 to 5 weeks. Construction of the temporary cofferdam
and all in-water work would comply with WDFW HPA requirements to minimize impacts to
fish.

Trenching activities would disturb bottom sediments and could temporarily increase turbidity in
the area immediately downstream of the outfall. Fish present in the river would be disturbed by
suspended sediments; however, the impacts would be temporary and dependent upon river flow
during construction. Noise and the presence of construction equipment along the shoreline may
also temporarily displace fish in the area.

The effluent discharged into the Spokane River will meet requirements of the NPDES permit and
is not expected to cause impacts to fish. In the event of an emergency in which untreated
effluent is discharged, fish could be affected.

Springfield Avenue Outfall
Plants
Impacts at the Springfield Avenue outfall location would be similar to those at the Rebecca
Street location.

Animals
Impacts to animals at the Springfield Avenue outfall location would be similar to those at the
Rebecca Street location.




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Spokane County WWTP Final Supplemental EIS




Fish
Impacts to fish at the Springfield Avenue Outfall would be similar to impacts discussed above
for the Rebecca Street Outfall.

Biosolids
No impacts to plants or animals are expected as a result of biosolids application. Biosolids
would be applied to existing agricultural areas and would be applied in the same manner as other
agricultural amendments. Application methods would comply with all environmental
regulations.
MITIGATION MEASURES
No adverse impacts to plants or animals are expected as a result of construction at the treatment
plant sites, so no mitigation is needed. The addition of native plant materials used in landscaping
would improve conditions on the selected project site and could provide habitat for some urban
wildlife species. Because the effluent would meet NPDES permit requirements for water
quality, no impacts to fish are anticipated.

The County willcould install an osprey nesting platform at a suitable location along the Spokane
River to replace the deteriorated nest that would be removed from the Stockyards Alternative
site, in coordination with WDFW.

The following mitigation measures could be implemented to minimize the adverse effect of
construction and operation of the outfall in the Spokane River:

•   Implementation of BMPs and an approved dewatering plan along the Spokane River shoreline;
•   Compliance with NPDES construction permit requirements to ensure that dewatering water is
    treated to meet Ecology surface water quality standards before release into the Spokane River;
•   Implement a Hazardous Spill Prevention Plan during shoreline construction, as described in the
    Environmental Health section;
•   For in-water construction work, comply with all requirements of the WDFW HPA and the
    Army Corps of Engineers permits.
•   The river bank would be revegetated following construction.




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                                                           Spokane County WWTP Final Supplemental EIS



                      LAND USE AND SHORELINES
This section describes potential impacts to land use associated with the construction and operation
of wastewater treatment facilities, and the project's consistency with adopted land use plans and
zoning codes. The Stockyards Alternative is located within the City of Spokane; the Alki/Fancher
Alternative is located in the newly incorporated City of Spokane Valley. The City of Spokane
Valley will continue to operate under Spokane County government until the City establishes its
own government and regulations. Relevant land use regulations for Spokane County and the City
of Spokane are described, including Comprehensive Plans, Zoning Codes, and Shoreline
Programs.
AFFECTED ENVIRONMENT
The Washington Growth Management Act (GMA) of 1990 requires that cities and counties
prepare comprehensive plans that conform with GMA goals and urban growth area designations,
and with population projections developed under the GMA planning process. In August 2001
Spokane County adopted a revised Comprehensive Plan based on revisions to the 1994
document, Countywide Planning Policies. Spokane County prepared a draft and final
Environmental Impact Statement on the Recommended Comprehensive Plan. The revised
Comprehensive Plan contains policies for capital facilities and utilities, including wastewater
treatment facilities.

The City of Spokane adopted a revised Comprehensive Plan on May 21, 2001. A Draft
Comprehensive Plan and Draft Environmental Impact Statement (City of Spokane, 2000) and a
Final Environmental Impact Statement for the Recommended Comprehensive Plan (City of
Spokane, 2001a) were prepared in support of the revision process. The revised Comprehensive
Plan contains goals and policies for capital facilities that include wastewater treatment facilities.
These goals and policies establish Level of Service (LOS) standards, criteria for meeting LOS
standards for new development, guidelines for conformance with the Comprehensive Plan and
the Capital Facilities Element. Specifically, Goal CF.7 reads: “Coordinate private and public
sanitary sewer planning to promote efficient service, protect natural resources, and ensure the
orderly physical development of Spokane County consistent with adopted plans and policies.”

The GMA requires that a comprehensive plan or development regulation must allow for the
siting of an essential public facility. The GMA directs counties to "provide for a cooperative
interjurisdictional approach to siting essential public facilities of a countywide, regional or
statewide nature consistent with the Countywide Planning Policies" (WAC 365-195-340.3b). In
1996, the County approved the Growth Management Essential Public Facilities Technical
Committee Report (Spokane County, 1996). The report was submitted to all Spokane County
jurisdictions for inclusion in their comprehensive plans. The report includes a Model Siting
Process, an Interjurisdictional Consistency Review Process, and an inventory of existing
essential facilities. Sewage treatment facilities of a regional/countywide nature are included as
an essential public facility. The report is included as part of the 2001 Spokane County
Comprehensive Plan.

The Model Siting Process includes the following steps:


December 2002                                                                                Page 3-45
Spokane County WWTP Final Supplemental EIS


•   Step One: Identify the proposed project as an essential public facility.
•   Step Two: Classify the facility as having a statewide, regional/countywide, or local
    significance.
•   Step Three: Provide early notification and involvement of affected citizens and jurisdictions
    allowing for opportunities to comment on the proposal. The nature of the factors making the
    facility difficult to site should be considered when determining the appropriate level and type
    of citizen participation in the siting process.
•   Step Four: Applicants for statewide and regional/countywide significant facilities should
    provide an analysis of alternative sites considered for the proposed facility.
•   Step Five: The proposed facility should be reviewed for impacts of the facility on regional
    growth planning concepts such as the urban nature of the facility, existing urban growth near
    the facility site, compatibility of urban growth with the facility, compatibility of facility siting
    with respect to Urban Growth Area boundaries, urban sprawl, economic development, and
    affordable housing.
•   Step Six: Proposed essential public facilities should be reviewed for site development criteria
    including the time required for construction, property acquisition, control of onsite and offsite
    impacts during construction, and expediting and streamlining necessary government approvals
    and permits if all other criteria have been met.
•   Step Seven: The proposed facility should be reviewed to determine if the financial impact on
    the jurisdiction can be reduced or avoided.

The County’s proposed wastewater treatment plant is an essential public facility due to its
regional/countywide nature. The County’s siting process has been and will continue to be
consistent with the model siting process.

The Spokane County Wastewater Facilities Plan is consistent with the recently adopted Spokane
County Comprehensive Plan. The County’s Division of Planning and Utilities Division worked
together to develop consistent projections for population, commercial and industrial growth
within the County’s Sewer Service Area. The estimates of population served by the County’s
wastewater treatment facilities are based on population growth projections and include extension
of service to existing populations in the County not currently served by sewers. These areas
have been identified for future connection to the County sewer system through the Septic Tank
Elimination Program to protect water quality in the Spokane Aquifer.

Zoning ordinances for both Spokane County and the City of Spokane direct development in the
area (Spokane County, 1998). Spokane County allows for a sewage treatment plant under the
use designation of Utility Services and Systems (Not Elsewhere Classified (N.E.C.); Spokane
County Zoning Code, Chapter 14.629) for all industrial zones (I-1, I-2, and I-3).

The City of Spokane allows sewage treatment plants in all zones by special permit. According to
Article IV: Special Uses, subsection 11.19.310: Uses by Special Permit in Any Zone, of the
Spokane Municipal Code–Land Use (City of Spokane, 2001b), a Special Permit can be granted
by the hearing examiner for a wastewater treatment plant in any zone subject to conditions and
standards as deemed necessary by the examiner. Special Permit decisions by the Examiner are
only appealable to Superior Court.



Page 3-46                                                                               December 2002
                                                          Spokane County WWTP Final Supplemental EIS


Spokane County's Zoning Ordinance (Chapter 14) includes wastewater conveyance in its
definitions of a Public Utility Distribution Facility and a Public Utility Transmission Facility.
Both distribution and transmission facilities are permitted in all residential zones. In business,
industrial, mining, and agricultural zones, distribution facilities are permitted. Transmission
facilities are permitted subject to the following conditions:
•   The utility company shall secure the necessary property or right-of-way to assure the proper
    construction, continued maintenance, and general safety to the properties adjoining the public
    utility transmission facility;
•   The facilities shall be compatible with the surrounding uses either by distance, landscaping,
    buffering, or design, as determined by the Zoning Administrator; and
•   The height of the structure above ground does not exceed 125 feet.

The City of Spokane's Shoreline Master Program was adopted in 1975 and amended in 1977.
The program sets goals and policies, regulates activities, and authorizes a permit system in a
200-foot shoreline area adjacent to the Spokane River and Latah Creek in compliance with the
State Shoreline Management Act. In 1982 the City Council approved a Supplement to the
Master Program containing revised use regulations and administrative procedures (City of
Spokane, 1982). Siting of wastewater treatment plants and associated conveyance facilities is
allowed in shoreline zones through a conditional use approval.

Stockyards Alternative
Project Site
The Stockyards Alternative is located within the City of Spokane city limits and has an
Unrestricted Industrial Zone (M3) zoning designation. This site has been promoted by the
property owner as a future Freya Street Business Park. This site lies within an
industrial/commercial area and is bordered on the north and east by industrial and
industrial/commercial businesses. The Northern Pacific Railroad is located along the south
boundary of the project site and North Freya Way/North Freya Street is located along the west
boundary. No residential areas are located near the Stockyards Alternative. The Stockyards site
has been vacant since approximately 1999.
Inflow Conveyance Routes
There are three inflow conveyance routes proposed for the Stockyards Alternative. All three
routes traverse a primarily industrial/commercial area with no residential areas or sensitive uses.
The Trent Avenue option, however, begins at a single-family residential area near the existing
North Valley Interceptor. The route would return to industrial/commercial land uses within less
than a quarter mile from the interceptor. The route heads generally southwest using road right-
of-way up to the treatment plant site (Figure 2-3). Zoning designations along this route include
commercial (C1), light industrial (M1), heavy industrial (M2), and unrestricted industrial (M3)
within the City of Spokane, urban residential (UR 3.5) and light industrial (I-3) within Spokane
County.

The Julia Street option would begin at the location of the Rebecca Street Outfall and heads
mainly south using road right-of-way up to the treatment plant site (Figure 2-3). Zoning
designations along this route include light and unrestricted industrial (M1 and M3) within the
City of Spokane.

December 2002                                                                               Page 3-47
Spokane County WWTP Final Supplemental EIS


The Havana Street route would begin at approximately Interstate 90 and East 2nd Avenue or
East 3rd Avenue and heads north to the treatment plant site (Figure 2-3). Zoning designations
along this route include community business (B2-1L), heavy industrial (M2), and unrestricted
industrial (M3) within the City of Spokane, and regional business (B-3) and urban residential
(UR 3.5) within Spokane County.
Outfall Conveyance Options
There are two outfall conveyance options for the Stockyards Alternative. Both options traverse
areas that are primarily industrial/commercial. The Rebecca Street option, that heads mainly
north and terminates at the Rebecca Street Outfall, does not abut any residential areas or
sensitive uses (Figures 2-3). Zoning designations along this route include light industrial (M1)
and heavy industrial (M3). The Springfield Avenue option passes through single-family
residential for approximately the last four blocks before the terminus of the conveyance route.
Zoning designations along this route include light industrial (M1), heavy industrial (M2),
unrestricted industrial (M3), commercial (C1), and single-family residential (R1).

Alki/Fancher Alternative
Project Site
The Alki/Fancher Alternative is located in Spokane County and within the newly incorporated
City of Spokane Valley, and is zoned Heavy Industrial (I-3). The City of Spokane Valley has
not yet established its own city government or regulations; this area will continue to operate
under Spokane County government until a new government is in place. As discussed above, a
sewage treatment plant is allowed under the I-3 zoning classification under the use designation of
Utility Services and Systems (N.E.C.).

The Alki/Fancher site is currently occupied by the Union Pacific Railroad Automobile
Distribution Center (vehicles are delivered via railcar and transferred to semi-trucks for transport
to delivery sites). The project site has also been proposed as the location for a potential light
rail/major rail station under its current Urban Activity Center (UAC) land use designation. An
Urban Activity Center is a planned residential and commercial area that is designed to be entirely
walkable. The Alki/Fancher site is bordered to the north by vacant property and
industrial/commercial businesses. To the east are retail/commercial businesses. To the south is a
busy retail shopping area separated from the proposed treatment plant site by three sets of
railroad tracks. The west property line is bounded by an abandoned gravel pit partially filled
with groundwater.

Inflow Conveyance Routes
There are two inflow conveyance routes for the Alki/Fancher Alternative. Both routes traverse
primarily industrial/commercial areas. As described above for the Stockyards Trent Avenue
Inflow Conveyance route, a small area of single-family residential is located at the beginning of
the route near the existing North Valley Interceptor. The Fancher Road route traverses road
right-of-way in a southerly direction until it reaches the treatment plant site (Figure 2-5). Zoning
designations along this route include commercial (C1) and heavy industrial (M2) within the City
of Spokane, urban residential (UR 3.5), and light industrial (I-2) and heavy industrial (I-3) within
Spokane County.



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                                                          Spokane County WWTP Final Supplemental EIS


The Fairgrounds route would begin at approximately Interstate 90 and East 2nd Avenue or East
3rd Avenue, head north on road right-of-way for approximately 0.5 mile and then head east
along the southern boundary of the Interstate Fairgrounds up to the treatment plant site
(Figure 2-5). Zoning designations along this route include urban residential (B2-1), heavy
industrial (M2), and unrestricted industrial (M3) within the City of Spokane, and urban
residential (UR), commercial business (B-3), and urban residential (UR 3.5) and heavy industrial
(I-3) within Spokane County.
Outfall Conveyance Options
There are two outfall conveyance options for the Alki/Fancher Alternative. Both options
traverse areas that are primarily industrial/commercial. The Havana Street option, that heads
mainly north and terminates at the Rebecca Street Outfall, does not abut any residential areas or
sensitive uses (Figures 2-5). Zoning designations along this option include light industrial
(M1/I-2) and heavy industrial (M3/I-3) in the City of Spokane and Spokane County,
respectively. The Broadway Avenue option passes through single-family residential for
approximately the last four blocks before the terminus of the conveyance route. Zoning
designations along this route include light industrial (M1), heavy industrial (M2), unrestricted
industrial (M3), commercial (C1), and single-family residential (R1).

Rebecca Street Outfall
The Rebecca Street Outfall would be located along the south bank of the Spokane River at a
location approximately at the intersection of North Rebecca Street and East Ermina Avenue
(Figures 2-3 and 2-5). To the southeast is a logger skills arena and to the southwest is a Spokane
Community College maintenance facility. This outfall location lies within the City of Spokane
city limits. The area is zoned light industrial (M1) and has a shoreline designation of Upriver-
Urban.

Springfield Avenue Outfall
The Springfield Avenue Outfall would be located along the south bank of the Spokane River at
the location of an abandoned industrial property at the terminus of East Springfield Avenue
(Figures 2-3 and 2-5). This site appears to have been used as a concrete plant or similar
business. This outfall location lies within the City of Spokane city limits. The area is zoned
light industrial (M1) and has a shoreline designation of Upriver-Urban.

Biosolids
The majority of biosolids would be transported via truck to agricultural areas in the Spokane
County area. Some biosolids may be transported to other Washington counties. If biosolids are
used at mining reclamation sites, many of these are located in Idaho.
IMPACTS

Construction
Stockyards Alternative
Project Site. During construction, nearby businesses could experience temporary construction-
related impacts, such as increased noise, dust, and construction vehicle traffic. Local traffic may
be temporarily rerouted, possibly resulting in delays either entering or leaving the businesses.
See the Noise, Air Quality, and Transportation sections of this chapter, for additional discussion

December 2002                                                                              Page 3-49
Spokane County WWTP Final Supplemental EIS


regarding these topics. These impacts would be temporary but would occur intermittently over a
2.5-year construction period.

No zoning changes would be required; the City of Spokane would allow a sewage treatment
plant under this designation upon approval of a Special Permit (SMC 11.19.310 – Uses By
Special Permit In Any Zone).

Construction of the proposed new Spokane County wastewater treatment plant at the Stockyards
site would require the initiation of the County's property acquisition process. Spokane County's
real estate services would assess the property's market value and negotiate just compensation.

Inflow Conveyance. Construction-related impacts associated with the Stockyards Inflow
Conveyance would result in dust, noise, and construction vehicle traffic. These impacts could
result in some disruption to existing businesses adjacent to the conveyance routes due to dust
accumulation in buildings, disruption to conversations due to noise, and delays in entering and
exiting the business property due to construction traffic. In addition to the implementation of
mitigation measures, these impacts would be temporary and short in duration and would cease
upon project completion.

Conveyance pipe would be laid mainly within existing road right-of-way or vacated road right-
of-way, therefore no direct construction-related impacts to land use would occur as a result of the
Stockyards Inflow Conveyance route installation. Easements would need to be obtained for
construction across private property.

The acquisition of two, half-acre parcels would be required for two new pump stations associated
with the selected conveyance routes (one north and one south of the treatment plant; see Figures
2-3 and 2-5). The North Valley pump station could displace a single family residence; the
Spokane Valley pump station (to the south) could displace either a single-family residence or a
business. The County would initiate its property acquisition process to take ownership of the
selected property. Acquisition of property by Spokane County for use as pump station locations
would preclude its future development for residential or business uses. It is also possible that
residences or business could be displaced as a result of acquisition and construction.
Outfall Conveyance. Construction of the Stockyards outfall conveyance routes would be the
same as described above in the Stockyards inflow conveyance routes.

Conveyance pipe would be laid mainly within existing road right-of-way or vacated road right-
of-way, therefore no direct construction-related impacts to land use would occur as a result of the
Stockyards Outfall Conveyance route installation. Easements would need to be obtained for
construction across private property.

No zoning changes would be required; the City of Spokane would allow a sewage treatment
plant, including conveyance systems, under this designation upon approval of a Special Permit
(SMC 11.19.310 – Uses By Special Permit In Any Zone).

Alki/Fancher Alternative
Project Site. Land use impacts resulting from construction of the treatment plant at the
Alki/Fancher site would be the same as described above for the Stockyards site.

Page 3-50                                                                            December 2002
                                                         Spokane County WWTP Final Supplemental EIS




Should the Alki/Fancher site be chosen as the location of the new treatment plant, Spokane
County land use regulations would not require any rezoning or comprehensive plan amendment.
A wastewater treatment plant would be allowed under the I-3 (heavy industrial) zoning
designation as it would fall under the Utility Services and System (Not Elsewhere Classified) use
designation of the Spokane County Code's Industrial Zones Matrix (Chapter 14.629).

This site currently supports the Union Pacific Railroad Automobile Distribution Center. Prior to
construction of the proposed new Spokane County wastewater treatment plant at the
Alki/Fancher site, the County would initiate its property acquisition process.

Inflow Conveyance. Construction of the pipelines in the Alki/Fancher inflow conveyance
routes would be the same as described above for the Stockyards inflow conveyance routes.

Outfall Conveyance. Construction of the pipeline in the Alki/Fancher outfall conveyance route
options would be the same as described above for the Stockyards outfall conveyance options.

Rebecca Street Outfall
Construction of the Rebecca Street Outfall would result in dust and noise that could be disturbing
to adjacent and nearby properties. These impacts would be temporary and short in duration and
would cease upon project completion. No zoning changes would be required; the City of
Spokane would allow a wastewater outfall under the M1 designation upon approval of a Special
Permit, as part of the wastewater treatment plant system.

Wastewater treatment facilities are a permitted activity in all of the City of Spokane's zoning
classifications upon approval of a Special Permit granted by the hearing examiner (SMC
11.19.310 – Uses By Special Permit In Any Zone). Treatment plant outfalls would require a
Shoreline Management Conditional Use Permit under all shoreline designations within the City
of Spokane.
Springfield Avenue Outfall
Construction-related impacts would be the same for the Springfield Avenue Outfall as described
above for the Rebecca Street Outfall.

No Action Alternative
Under the No Action Alternative, no construction-related impacts would occur to land use or
shoreline use in Spokane County or the City of Spokane.

Operation
Stockyards Alternative
Project Site. The Stockyards site is currently vacant and has been vacant for approximately
3 years. The site has been promoted as a future Freya Street Business Park location.
Development of this site as a wastewater treatment plant would preclude other industrial
businesses from occupying this property. No other land use impacts specific to the Stockyards
site would occur as a result of operation of a new wastewater treatment plant.



December 2002                                                                             Page 3-51
Spokane County WWTP Final Supplemental EIS


No changes to adjacent land uses are anticipated as a result of the proposed treatment plant. The
area is industrial/commercial and is bordered by the Burlington Northern Railroad on its south
side. No businesses would be moved or relocated. The new plant is expected to be compatible
with the surrounding landscape through building design, landscaping, and setbacks from
property boundaries.

Inflow Conveyance. Impacts to land use as a result of the Stockyards Inflow Conveyance route
options would not require any major changes in land use for the two routes because the
conveyance pipe would be laid mainly within existing road right-of-way or vacated road right-
of-way. Easements would need to be obtained for construction across private property. The
conveyance pipeline would be located underground and would not disrupt adjacent existing or
future land uses along the routes, once constructed.

Outfall Conveyance. The operation of the Stockyards Outfall Conveyance would not require
any major changes in land use for the two routes because the conveyance pipe would be laid
mainly within existing road right-of-way or vacated road right-of-way. Easements would need to
be obtained for construction across private property. The conveyance pipeline would be located
underground and would not disrupt adjacent existing or future land uses along the routes, once
constructed.

Alki/Fancher Alternative
Project Site. The site is currently being used by the Union Pacific Railroad Auto Distribution
Center. Automobiles are brought to the site via railcar and transferred to semi-trucks for
transport to delivery locations. Should the Aki/Fancher Alternative be selected as the location of
the proposed new wastewater treatment plant, land use would change from an automobile
transfer facility to a public utility facility (treatment plant). The existing Auto Distribution
Center would be displaced.

A new wastewater treatment plant would also have the potential of precluding light industrial or
commercial uses on the site or in the vicinity. As part of the County’s designation of this area as
an Urban Activity Center, more retail businesses may have been in position to locate in the area.
However, with the incorporation of the new City of Spokane Valley, proposals to locate a transit
center that would further generate commercial interest are pending. As evidenced by many in-
city examples of wastewater treatment plants, a new treatment plant at this location could be
compatible with both an industrial or commercial neighborhood through landscape and building
design.

Inflow Conveyance. Impacts to land use as a result of the Alki/Fancher Inflow Conveyance
routes would be the same as described above for the Stockyards inflow conveyance routes.

Outfall Conveyance. Impacts to land use would be the same as described above for the
Stockyards outfall conveyance route options.

Rebecca Street and Springfield Avenue Outfall Options
The riverbank would be temporarily disturbed while the outfall pipe trench is excavated and pipe
is installed. The trench would be backfilled and the riverbank restored to its pre-excavation
condition. The existing and future land use of the property above the bank would not change as

Page 3-52                                                                             December 2002
                                                        Spokane County WWTP Final Supplemental EIS


the outfall and its conveyance would be located below ground or water level and would not
preclude development of the site under its existing zoning and land use regulations.

No Action Alternative
Under the No Action Alternative, no impacts would occur to existing land use or shoreline use in
Spokane County or the City of Spokane. It is possible that building moratoria could be
implemented at a future time should the existing SAWTP reach and exceed its capacity to treat
the City's and County's wastewater.
MITIGATION MEASURES
To mitigate for land use and shoreline impacts resulting from construction and operation of a
new wastewater treatment plant and associated facilities, Spokane County will meet with
businesses in the vicinity of the treatment plant site and develop ways to mitigate potential
construction impacts to their business operations. would develop a comprehensive business
assistance plan. This plan would focus on minimizing disruptive construction impacts and would
include mitigation identified in the Noise, Air Quality, and Transportation sections of this
chapter. A point of contact would also be provided to answer address complaints and receive
suggestions from local residents and businesses during construction.




December 2002                                                                            Page 3-53
Spokane County WWTP Final Supplemental EIS



                                      RECREATION
This section discusses recreational facilities within the vicinity of the proposed wastewater
treatment plant sites, conveyance corridors, and outfall locations. See Figure 3-5 for the
locations of recreational facilities, parks, and trails within the vicinity of the project area.
AFFECTED ENVIRONMENT

Stockyards Alternative
Project Site
Five recreational facilities are located within 0.5 mile of the Stockyards site: the Spokane
Interstate Fairgrounds, Playfair Racetrack, Chief Garry Park, athletic fields at Spokane
Community College (SCC), and the Spokane River Centennial Trail. The City of Spokane Parks
and Recreation Department owns and manages Chief Garry Park and the Spokane River
Centennial Trail.

The Spokane Interstate Fairgrounds are located approximately 0.5 mile southeast of this site
along North Havana Street. See the discussion under the Alki/Fancher Alternative for a
complete description of the fairgrounds.

Playfair Racetrack, a 65-acre privately-owned horse racing facility, is located approximately
0.5 mile southwest of the Stockyards site. The racetrack has been inactive since December 2000,
but there is considerable interest among racing fans in the region to have the racetrack
reactivated. The racetrack was recently purchased with the intention of re-establishing active
racing.

Chief Garry Park, designated as a neighborhood park occupying 10.7 acres, is located
approximately 0.5 mile northwest of the Stockyards site. Amenities at this park include
softball/baseball fields, picnic facilities with tables, and playground equipment.

Spokane Community College, located approximately 0.5 mile to the north of the site, offers
athletic facilities which include a track and field complex, tennis courts, a gymnasium, and a
sportsfield providing regulation baseball and softball fields. Primary users of the facilities are
SCC students; however, during summer months the public uses the tennis courts and track. High
school summer basketball leagues also use the gymnasium. In addition, a logger skills arena is
provided by the college and is used for practices and competitions.

The Spokane River Centennial Trail extends eastward for 22 miles from Riverfront Park in
downtown Spokane to the Idaho border. Walkers, joggers, rollerbladers, and bicyclists are
primary users of the trail; cross-country skiers use the trail during winter months. The central
segment of the Spokane River Centennial Trail is located approximately 0.5 mile north of the
Stockyards site.




Page 3-54                                                                               December 2002
                                                                       Parks
                                                                       Other Recreational Features
                                                                       Trails
                                                                       Wastewater Treatment Plant Sites
                                                                       Outfalls
                                                                       Railroad




                                                                                                                                                                                                                                                                                                               N Havana St
                                                                                                                                                                                                                                                                       N Rebecca St
                                                                                                                                                                                                                                                N Freya St
                                                                       Streets
                                                                       Spokane River                                                                                                                        Tuffy's Trail

                                                                       City of Spokane
                                                                                                                             Spokane River Centennial Trail                                                                                                                                            Rebecca Street
                                                                       City of Spokane Valley                                                                                                                                                                                                           Outfall Option

                                                                       Unincorporated Spokane County                                                                                           r
                                                                                                                                                                                           ive
                                                                                                                                                                                         eR                                                                                                                                                                                      d
                                                                                                                                                                                   an                                                                                                                                                                                   lr o a
                                                                                                                                                                                 ok                                                                                                                                                                          al   Rai
                                                                                                                                                                          Sp                                                                                                                                                                          t io n
                                                                                                                                                                                                                                                                                                                                                rna
                                                                                                                                                                                                                                                                                                                                       In t e




                                                                                                                                                                                                                                                             N Rebecca St
                                                                                                                                                                                                                                                                                                                                  ne




                                                                                                                                       N Perry St
                                                                                                                                                                                       Spokane Community College
                                                                                                                                                                                                                                                                                                                        Sp   ok a
                                                                                                                    Mission Park                                                                                                                                                                                                       Av       e
                                                                                                                                                                                                                                                                                                                                  rent
                                                                                                                                                                                                                                                                                                                             ET
                                                                                                                                                                         E Mission Ave
                                                                                                 E Mission Ave                                             Chief Gary Park                                            N
                                                                                                                                                                                                                          Fr
                                                                                                                                                                                                                               ey
                                                                                                                                                                                                   STOCKYARDS                       a
                                                                                                                                                                                                                                        W
                                                                                                                                                                                                                                            y




                                                                                                                                                                           N Napa St
                                                                                                                                                                                                   ALTERNATIVE
                                                                                                                                                                                                                                                                                                                                                         Spokane Interstate Fairgrounds
                                                                                                                                                                                                                                                                                                   d
                                                                                                                                                                                                                                                                                            lr o a
                                                                                                                                                                                                                                                                                      Rai
                                                                                                                                                                                                                                                                   ern                                             E Broadway Ave
                                                                                                                                                                                                                                            N            or th
                                                                                  Riverfront Park                                                                 E Springfield Ave                                                     ton
                                                                                                                                                                                                                            lin g
                                                                                                                                                                                                                     B ur




                                                                                                                                                                                                                                                                                                          N Havana St
                                                                                                                                                                                                               Playfair
                                                                                                                                                      E Trent Ave
                                                                                                                                                                                                              Racetrack

                                                                                                                                                    Springfield Avenue
                                                                                                                                                      Outfall Option
L:\ENVIR IMPACTS\2000 projects\20062 SPK Co WW Plan\gis\recreate.mxd




                                                                                                                                                                                   E Sprague Ave                                                     Union Pacific Railroad
                                                                                                                                                            Helena St




                                                                                                                                                                                                                                                                                                                                  ALKI/FANCHER
                                                                                                                                                                                                                                                                                                                                   ALTERNATIVE




                                                                           Map data shown are the property of the                                                                                                                                 FIGURE 3-5
                                                                           sources listed below. Inaccuracies may
                                                                           exist, and Adolfson Associates, Inc. implies
                                                                           no warranties or guarantees regarding any
                                                                                                                                                                                                                                     RECREATIONAL FACILITIES
                                                                           aspect of data depiction.
                                                                                                                             0                           0.5                                   1        SPOKANE COUNTY REGIONAL WASTEWATER TREATMENT PLANT
                                                                          Source: Spokane County GIS, 2001                                                                                      Miles                                  SPOKANE, WASHINGTON
                                                                                                                                                    September, 2002
Spokane County WWTP Final Supplemental EIS




THIS PAGE INTENTIONALLY LEFT BLANK




Page 3-56                                    December 2002
                                                          Spokane County WWTP Final Supplemental EIS




Inflow Conveyance
The Trent Avenue, Julia Street, and Havana Street conveyance routes pass within 0.25 mile of
the Spokane Interstate Fairgrounds. The Julia Street option would traverse along North Rebecca
Street along the SCC campus, near the outdoor athletic facilities. The Havana Street route,
which would travel north along North Havana Street from approximately Interstate 90, would
pass adjacent to the Spokane Interstate Fairgrounds.

Outfall Conveyance
The Rebecca Street option would pass directly adjacent to the SCC campus along North Rebecca
Street. Both the baseball/softball fields and track and field area are located on the eastern portion
of the campus, along North Rebecca Street. Mission Park, a 13.3-acre park located along the
Spokane River shoreline, is approximately 1.5 miles downstream from the Rebecca Street
Outfall, on the opposite side of the river. Mission Park offers softball/baseball fields, tennis
courts, picnic tables, and playground equipment. In addition, an informal dirt trail extends east
from North Greene Street along the southern shoreline of the Spokane River. This trail is not
maintained by the City or County Parks Departments; however, walkers, joggers, and bicyclists
utilize this trail. No other recreational features are located along the Rebecca Street option.

The nearest recreational opportunity along the Springfield Avenue option is the former Playfair
Racetrack, which is located one block south of the corridor at the intersection of East Springfield
Avenue and East Trent Avenue. Plans are underway to reopen the racetrack under new
ownership. Riverfront Park, a 100-acre multi-function park, is the nearest shoreline recreational
facility downstream of the Springfield Street Outfall. This is an important regional facility that
was the site of the 1974 World’s Fair and includes park rides and provides areas for various
community celebrations. The park is approximately 1.5 miles west of the outfall and is located
in the center of Downtown Spokane.

Alki/Fancher Alternative
Project Site
The Spokane Interstate Fairgrounds, located directly west of the Alki/Fancher site, is the only
recreational facility within 0.5 mile of the site. An abandoned gravel quarry separates the site
from the fairgrounds. The Spokane Interstate Fairgrounds is the location for numerous consumer
shows, performances, and events. The fairgrounds are generally not open to the public unless
such events are occurring. The Historic Railroad Association frequently uses a portion of this
site for its activities. In addition, the Avista Stadium, home to the Spokane Indians, an AAA
baseball team, is located on the west side of the Fairgrounds property.

Inflow Conveyance
Both the Fancher Road and Fairgrounds inflow conveyance routes fall within the immediate
proximity of the Spokane Interstate Fairgrounds. The Fairgrounds route traverses directly south
of the fairgrounds to access the Alki/Fancher site. The Fancher Road route would access the site




December 2002                                                                               Page 3-57
Spokane County WWTP Final Supplemental EIS


from North Fancher Road, which is separated from the fairgrounds by a gravel pit and the
automobile transfer facility. No other recreational facilities are within 0.5 mile of either corridor.
See above for specific descriptions of these facilities.

Outfall Conveyance
Both the Havana Street and Broadway Avenue options would pass near similar recreational
features as discussed for the Stockyards outfall conveyance routes. The Havana Street route
would also fall within 0.5 mile of Chief Garry Park. The Havana Street route, which would
traverse along North Rebecca Street, would pass adjacent to the SCC outdoor athletic facilities,
including the track and baseball/softball fields. The Broadway Avenue route would pass
approximately a block from the Playfair Racetrack near the East Springfield Avenue and East
Trent Avenue intersection.

In addition, the Interstate Fairgrounds and Avista Stadium, because of their close proximity to
the Alki/Fancher site, would be within the immediate vicinity of both the Havana Street and
Broadway Avenue conveyance routes. The Spokane River Centennial Trail is directly across
from where the conveyance routes would meet the outfall locations. See the Stockyards Project
Site discussion for specific descriptions of these facilities.

Outfall Options
The Spokane River Centennial Trail is located directly across the river from both the proposed
Rebecca Street and Springfield Avenue outfalls (see Figure 3-5). The trail is separated from the
river by shoreline vegetation including grasses, shrubs, and trees. See the discussion above for
the Stockyards alternative for a complete description of the trail.
IMPACTS

Construction
Stockyards Alternative
Project Site. Since the proposed wastewater treatment facility is not on a property designated
for recreation, no direct impacts as a result of construction would occur to recreational facilities
at the Stockyards site. Although no direct impacts to recreational facilities are expected with the
construction of the treatment plant on the Stockyards site, indirect impacts are likely to occur.
Temporary detours of local traffic during construction may be required when hauling material
from the site or bringing in equipment and machinery for wastewater processing. These indirect
impacts would be insignificant due to their temporary, short-term and intermittent occurrences
over the course of construction.

Inflow Conveyance. No direct impacts to recreational features within the project vicinity would
occur as a result of construction along the Trent Avenue, Julia Street, or Havana Street
conveyance routes. The Julia Street option would have the most significant indirect impact to
recreational facilities since it would traverse along North Rebecca Street at SCC. All three of the
inflow conveyance routes would pass within 0.25 mile of the Spokane Interstate Fairgrounds and
could cause indirect impacts as a result of construction. Indirect impacts could include increased
traffic congestion, odors, noise, and dust which could affect people traveling to and attending
events at the fairgrounds.

Page 3-58                                                                               December 2002
                                                          Spokane County WWTP Final Supplemental EIS


Outfall Conveyance. The Rebecca Street conveyance option would have greater temporary
impacts to recreational facilities compared to the Springfield Avenue option. Because the SCC
athletic fields are located directly adjacent to North Rebecca Street where the conveyance
pipeline would be located, users of the track and baseball/softball fields would be exposed to
construction activities associated with the open-trench construction. These impacts would
include dust, odor, and noise. In addition, ingress and egress routes to the SCC campus could be
redirected throughout the duration of construction in this area, causing travel disruptions.
Traffic, noise, odor, and dust impacts would be short-term and temporary, with open-trench
construction adjacent to the athletic fields expected to last up to 4 weeks. In addition, the
informal trail along the southern shoreline of the Spokane River would be temporarily re-routed
or closed where the corridor crosses the path.

The Springfield Avenue conveyance option would not cause any indirect impacts to nearby
recreational facilities. However, as the conveyance pipeline is installed near the intersection of
East Trent Avenue and East Springfield Avenue users of the racetrack, if it were in operation,
could potentially experience increased noise, dust, and odor associated with truck traffic.
Construction along these two roadways would also cause increased congestion. These impacts
are minor due to their short-term and temporary nature.
Alki/Fancher Alternative
Project Site. Similar to the Stockyards alternative, no recreational facilities are located within
the Alki/Fancher site. An indirect impact of construction at the Alki/Fancher site could result in
some inconveniences at the Spokane Interstate Fairgrounds as a result of construction-related
traffic, dust, odor, and noise because of its close proximity to the project site. Traffic congestion
would likely be the most significant indirect impact since local access routes to the fairgrounds
could experience detours and and/or closures for construction activity (see Transportation section
for more details).

Inflow Conveyance. The Spokane Interstate Fairgrounds is the only recreational facility within
0.5 mile of both the Fancher Road and Fairgrounds inflow alternatives. Because of the close
proximity of the fairgrounds, increased traffic congestion, dust, noise and odor associated with
open-trench construction could be experienced by those attending events.

Outfall Conveyance. Neither the Havana Street nor Broadway Avenue options would have
direct impacts to local recreational features. Construction impacts along the Havana Street
option would be similar to the Rebecca Street option discussed under the Stockyards Outfall
Conveyance. The Havana Street option would pass adjacent to SCC and would also be within
0.5 mile of Chief Garry Park. The Broadway alternative, which would fall within the vicinity of
Playfair Racetrack, would have similar indirect impacts related to odor, noise, dust, and traffic as
the Springfield Avenue outfall conveyance option.

Both outfall conveyance options would pass adjacent to the Spokane Interstate Fairgrounds.
Construction-related impacts would be similar to those previously discussed for the Alki/Fancher
inflow conveyance systems




December 2002                                                                               Page 3-59
Spokane County WWTP Final Supplemental EIS


Outfall Options
Construction of either the Rebecca Street or the Springfield Avenue outfalls would not directly
impact nearby recreational uses. The Spokane Centennial Trail, although located in close
proximity to the outfall locations, is on the opposite shoreline from the outfalls and is blocked
from view by shoreline vegetation including trees and shrubs. Recreational watercraft users
(kayaks and canoes) along the Spokane River in the immediate vicinity of the outfall areas may
experience construction related noise, dust, and odor from construction near the Spokane River
shoreline. Construction at the outfall areas would last up to 5 weeks.

No Action Alternative
No construction impacts to recreational facilities would occur with the selection of the No Action
Alternative.

Operation
Stockyards Alternative
There are no anticipated long-term operational impacts to recreation resulting from the operation
of the wastewater treatment facility, conveyance pipelines, or outfall for the Stockyards
alternative. State-of-the-art odor and noise control equipment would be utilized in the
construction of the wastewater treatment plant; therefore, odor and noise impacts that could
indirectly affect recreational activities in the vicinity of the plant are not anticipated. The
proposed conveyance routes and outfall options would be located and operated entirely below-
grade; therefore, no adverse operational impacts to nearby recreational facilities are anticipated.
Traffic related to the daily operation of the wastewater treatment facility would use roadways
that may be used to access nearby recreational areas. However, this impact would likely be
minimal since the treatment plant would not require a large number of staff to operate the facility
and the number of trucks needed for septage hauling, biosolids transport, and supply deliveries
would be relatively few. See the Transportation discussion for further discussion on traffic
associated with the facility.
Alki/Fancher Alternative
Impacts associated with the operation of the Alki/Fancher wastewater treatment system would be
the same as those mentioned above for the Stockyards Alternative. No long-term operational
impacts to recreational facilities would occur as a result of implementing the Alki/Fancher
wastewater treatment system alternative.

Outfall Options
In the event of a treatment plant failure, untreated effluent could be discharged to the river. This
could cause short-term public health impacts to recreational users of the outfall area.

No Action Alternative
No operational impacts related to recreation would occur under the No Action Alternative.




Page 3-60                                                                              December 2002
                                                         Spokane County WWTP Final Supplemental EIS



MITIGATION

Construction
Mitigation measures that could be incorporated to minimize adverse impacts to recreational
facilities include:

•   Modern construction equipment and techniques that minimize noise, dust, and odors would be
    used throughout the construction duration.
•   Develop a comprehensive notification system to alert users of recreational facilities about
    possible street disruptions, including closures and detour routes.
•   Widely publicize construction dates and routes.;
•   Coordinate construction activities withNotify recreational service providers and privately-
    owned recreational facilities about the location and timing of construction activities.
Operation
Mitigation measures that could be incorporated throughout the operation of the wastewater
treatment system to minimize impacts may include:
No significant long-term operational impacts that would adversely affect recreational facilities
are anticipated; therefore, no mitigation would be required.

Limited public open space could be added to the area through development of the Stockyards or
    Alki/Fancher Alternatives, especially during the first 20 years of operation (Figure 3-8). At
    full buildout, minimal open space would be available at the Stockyards site. Since the
    Alki/Fancher site is larger, more opportunity would be available to incorporate open space.
    The addition of public open space (e.g., park/open space areas, trails, etc.) in an area that
    currently lacks parks or vegetated open space could be a beneficial impact.
  Provide immediate public notice in the case of hazardous spills into the Spokane Riveror along
    the conveyance corridors.
• In the event of a spill at the outfall, the County would provide immediate public notice,
    including posting signs along the shoreline warning the public that it is unsafe to come in
    contact with the water.
  Aesthetic controls including noise control dampers and odor control facilities would be
    implemented as part of plant and pump station design;
  Innovative odor- and noise-control features would be included in the design of the wastewater
    treatment facility to minimize the effect on nearby recreational facility users.




December 2002                                                                             Page 3-61
Spokane County WWTP Final Supplemental EIS



                                      AESTHETICS
The following discussion evaluates existing aesthetic qualities in the vicinity of the treatment
plant sites, conveyance corridors, and outfall locations. This discussion evaluates impacts to
existing aesthetic qualities including scenic views, compatible scale and design of buildings with
adjacent properties, traffic flow, open space, and clean air; parameters which contribute to a
positive quality of life and comprise overall aesthetic quality of an area.
AFFECTED ENVIRONMENT
The proposed Spokane Wastewater Treatment plant system, including the treatment plant sites,
conveyance corridors, and outfall locations, are predominately located in highly urbanized areas.
Neighborhoods in the project vicinity include some residential, and a predominance of
commercial, and heavy- and light- industrial land uses (see the Land Use section for a further
discussion of land use in the project vicinity). Limited scenic opportunities are available in the
project vicinity due to the developed nature of the area. A scenic hillside known as the “basalt
bluff” is located to the east of downtown Spokane and is the predominant visual landmark within
the project vicinity. Open space and recreational areas are located throughout the project area
(see Figure 3-5).

Stockyards Alternative
Project Site
The Stockyards Alternative site is located in a light- to heavy-industrial area and is surrounded
by one- to two-story buildings that are largely composed of concrete and metal finishes. Because
of the relatively flat topography of the area, views of natural features are limited in the vicinity of
the Stockyards site. The site is a vacant lot that is mostly paved (Figure 3-6).
Inflow and Outflow Conveyance
The proposed inflow and outfall conveyance routes travel though a mixture of land uses
including light- to heavy-industrial, commercial retail, and medium-density residential areas.
Each of the conveyance routes is confined to roadway rights-of-way, generally in areas described
as "strip commercial." Proposed locations for the pump stations are near residential areas. See
the Transportation section for detailed information regarding traffic flow along affected
roadways.

Alki/Fancher Alternative
Project Site
Similar to the Stockyards site, the Alki/Fancher site is located in a highly-developed industrial
area. Limited public open space exists in the vicinity of the site since it is surrounded by
development that is composed of mostly impervious surfaces (Figure 3-7).
Conveyance Routes
Similar to the Stockyards Conveyance routes, the conveyance routes for the Alki/Fancher site
would traverse along road rights-of-way, predominantly in “strip commercial” areas.




Page 3-62                                                                               December 2002
Facing directly east across the site from the North Freya Street/East Boone Avenue intersection.




Facing southeast across the site from the North Freya Street/East Boone Avenue intersection.


                          File name: 20062_stockyard_cond.ai

        No Scale
                          Original graphic by: ACT                                                        FIGURE 3-6.
                          Edits by:
                          Date: 9/5/02                                  STOCKYARDS ALTERNATIVE - EXISTING CONDITIONS
                                                               SPOKANE COUNTY REGIONAL WASTEWATER TREATMENT PLANT
          Source: Adolfson Associates, Inc.
                                                                                               SPOKANE, WASHINGTON
Facing southwest across the site from East Alki Avenue.




Facing directly south across the site from East Alki Avenue.

                              File name: 20062_alki_cond.ai

          No Scale
                              Original graphic by: ACT                                                   FIGURE 3-7.
                              Edits by:
                              Date: 9/11/02                           ALKI/FANCHER ALTERNATIVE - EXISTING CONDITIONS
                                                              SPOKANE COUNTY REGIONAL WASTEWATER TREATMENT PLANT
              Source: Adolfson Associates, Inc.
                                                                                              SPOKANE, WASHINGTON
                                                           Spokane County WWTP Final Supplemental EIS




Outfall Options
The Rebecca Street Outfall option is located in an institutional area. The Springfield Avenue
Outfall option is located in a light-industrial area. At the outfall sites along the Spokane River,
onlookers can enjoy the scenery of the river flowing through the highly urbanized area of the
City of Spokane. Much of the natural vegetation, including large deciduous trees and shrubs,
have been retained along the shoreline. Recreational watercraft, including kayaks and canoes,
utilize the Spokane River year-round.

IMPACTS

Construction
Treatment Plant Sites
Construction at the selected wastewater treatment facility site is expected to result in temporary
impacts to aesthetic qualities. Typical construction impacts would include increased truck
traffic, noise, dust, and odor in the immediate vicinity of the construction site. Construction at
the treatment facility would last approximately 2.5 years.

Stockyards Alternative. Construction activities at the Stockyards site are not expected to have
a significant adverse impact to aesthetics in the immediate vicinity. Local motorists could
experience increased traffic, dust, and noise as a result of construction activities.

Alki/Fancher Alternative. Similar to the Stockyards Alternative, minimal adverse impacts to
aesthetic qualities would occur at the Alki/Fancher site. Traffic impacts would likely be the
greatest impact to local motorists. Depending on the location of events at the Spokane Interstate
Fairgrounds, noise, dust, and odors may be noticeable to people attending the special events.

Conveyance Routes
The greatest impact to aesthetic qualities in the project vicinity would result from the
construction of the selected conveyance alignment. The greatest impact related to aesthetic
qualities along the selected conveyance alignment would be from dust, construction equipment,
and traffic delays; construction could last up to 9 months, depending on the selected alternative.
The Alki/Fancher Broadway and Stockyards Springfield Conveyance routes would be the most
problematic since they both pass by residential neighborhoods and are the longest conveyance
options for both sites. Increased levels of traffic, dust, noise, and odor can be expected along
each of the proposed conveyance options.

Outfall Options
People utilizing the Spokane River for canoeing, kayaking, and swimming would notice
construction-related impacts including increased noise, dust, and odor along the shoreline
throughout the duration of the outfall construction. These construction impacts at the outfall
would be minor and temporary as the trenching and pipe installation for the outfall occurs.
Recreational users of the river would likely be deterred from normal recreational activities at the
site due to the coffer dam that would be used to dewater the outfall port construction area.
Construction of the outfall is expected to last up to 4 weeks.


December 2002                                                                               Page 3-65
Spokane County WWTP Final Supplemental EIS


No Action Alternative
No construction impacts related to aesthetics would occur with the selection of the No Action
Alternative because there would be no construction.
Operation
Treatment Plant Sites
Wastewater treatment plants by their nature are large facilities with structures that could be
considered out of scale with surrounding structures and activities. Buildings surrounding both
the Stockyards and Alki/Fancher sites are generally one- to two-stories in height; the wastewater
treatment facility would be a unique land use if placed at either site. The height and bulk of the
new wastewater treatment plant buildings are expected to be on the scale of agri-industrial or
warehouse/distribution facilities. Exposed structures would comprise a fairly large complex
which would be noticeable to adjacent properties and traffic along adjacent roadways
(Figures 3-8 and 3-9).
In addition, since the wastewater treatment facility would be operational 24 hours every day,
lighting from the facility could potentially be detected by surrounding properties. Finally, traffic
from workers’ vehicles, delivery trucks, and biosolids trucks would add to traffic flow in the
immediate area; however, this impact to traffic would be negligible.
Stockyards Alternative. Because the Stockyards site is currently a paved vacant lot,
development of the wastewater treatment facility would improve upon the current aesthetic
nature of the site. The facility would be highly visible by motorists from the North Freya Way
overpass. Landscaping and building design could ensure compatibility with the industrial scale
and character of the neighborhood.
Alki/Fancher Alternative. Changing the existing land use of the Alki/Fancher site from an
automobile transfer yard to a wastewater treatment plant would be a change in aesthetics at the
site. With innovative design, the wastewater treatment plant could be compatible with the
industrial, commercial, or retail character of the area as yet to be envisioned by the new
community.
Conveyance Routes
Each of the proposed conveyance pipelines would be located entirely below ground and would
not impact visual resources upon completion. However, two pump stations along the corridors
could occupy up to one-half acre each, and would be visible structures in the neighborhood.
These structures would be designed and constructed (e.g., exterior treatments, style and scale) to
be compatible with the surrounding community. Wastewater treatment facility workers would
periodically inspect facilities including pump stations along the conveyance corridors.
Outfall Options
The outfall could be visible from the Spokane River shoreline or by swimmers or users of
watercraft along the river during low water conditions. The outfall structure would be entirely
submerged under typical water level conditions. The utility cover that would be installed near
the shoreline for pipeline access would be unobtrusive.




Page 3-66                                                                             December 2002
                                                         Spokane County WWTP Final Supplemental EIS



No Action Alternative
With the implementation of the No Action Alternative, aesthetic impacts associated with over
capacity conditions at the existing Spokane Advanced Wastewater Treatment Plant (SAWTP)
could occur, including sewer overflows, building moratoria, and resulting economic impacts.

MITIGATION MEASURES

Construction
Adverse impacts to aesthetic quality would be unavoidable during construction. However, these
impacts would be temporary and for the most part short-term. The following mitigation
measures would be implemented to minimize aesthetic impacts:

•   Best Management Practices (BMPs) would be implemented to minimize adverse impacts of
    dust and odors which would also serve to minimize aesthetic impacts. These include:
    1) keeping areas of disruption to a minimum, 2) covering excavated material, and
    3) maintaining compact and clean construction areas (see the Air Quality Section for additional
    details).
•   Noise impacts would be minimized by restricting construction to designated hours as defined
    by both Spokane County and the City of Spokane (see the Environmental Health Section).
•   Increased congestion at construction sites would be inevitable. The Transportation Section
    discusses mitigation measures, including flaggers that would help control traffic flow and
    posting notices of construction periods.
Operation
The following mitigation measures would be implemented to minimize the adverse aesthetic
effects of the wastewater treatment facility once constructed:

•   The wastewater treatment plant should be designed to be compatible with adjacent structures.
    Facility components, including clarifiers and sludge thickening equipment, which are typically
    exposed, would be housed in structures. See Figure 3-8 for a depiction of the proposed
    wastewater treatment facility layout and Figure 3-9 for an example of how some of the more
    publicly accessible buildings might look.
•   Visual screening of the facility with fencing, vegetation, and architectural treatment consistent
    with nearby structures or with a community-supported design theme would assist in
    maintaining compatibility with surrounding uses.
•   Odor control measures should be included in the wastewater treatment plant design. Refer to
    the Air Quality section for a complete description of odor-containing devices that would be
    utilized at the treatment plant. Consider incorporating public open-space to provide amenities
    to the neighborhood.
•   Facility lighting would be designed to minimize off-site impacts while providing a safe
    working environment for the staff. Measures would include use of horizontal baffles or cut-
    offs to direct the light toward the ground and limit horizontal travel, control of reflective
    surfaces that could cause off-site light impacts, and maintenance of low lighting intensity along
    parking areas and walkways.



December 2002                                                                             Page 3-67
Spokane County WWTP Final Supplemental EIS


•   Pump stations should be designed in a manner that is compatible with the surrounding
    environment. See Figure 3-10 for examples of a typical pump station that would be located
    along the conveyance corridor.
•   The shoreline will be revegetated following installation of the outfall.




Page 3-68                                                                         December 2002
                     File name: 20062_wwtp.ai

No Scale
                     Original Graphic by: ACT                                                  FIGURE 3-8.
                     Edits by:
                     Date: 10/03/02             EXAMPLE WASTEWATER TREATMENT PLANT LAYOUT - 12 MGD PLANT
                                                   SPOKANE COUNTY REGIONAL WASTEWATER TREATMENT PLANT
       Source: Zeck Butler Architects.
                                                                           SPOKANE COUNTY, WASHINGTON
                     File name: 20062_admin.ai

No Scale
                     Original Graphic by: ACT                                              FIGURE 3-9.
                     Edits by:
                     Date: 08/01/02                EXAMPLE ADMINISTRATION AND MAINTENANCE AREA DESIGN
                                                 SPOKANE COUNTY REGIONAL WASTEWATER TREATMENT PLANT
       Source: Zeck Butler Architects.
                                                                          SPOKANE COUNTY, WASHINGTON
                  File name: 20062_examples.ai

No Scale
                  Original graphic by: ACT                                               FIGURE 3-10.
                  Edits by:
                  Date: 10/03/02                                               EXAMPLE PUMP STATION
                                                 SPOKANE COUNTY REGIONAL WASTEWATER TREATMENT PLANT
Source: Spokane County Public Works.
                                                                               SPOKANE, WASHINGTON
Spokane County WWTP Final Supplemental EIS




THIS PAGE INTENTIONALLY LEFT BLANK




Page 3-72                                    December 2002
                                                          Spokane County WWTP Final Supplemental EIS




                          CULTURAL RESOURCES
The following section discusses existing and/or potential cultural resources at the two alternative
locations, the outfall options, and conveyance routes as described in Chapter 2.0. Information
was gathered from existing reference materials and through a visual survey.
AFFECTED ENVIRONMENT

Stockyards Alternative
Project Site
This alternative is in the location of the former Union Stockyards, in operation for nearly
100 years until its closure in approximately 1999. Most of the stockyards buildings have been
removed. A small concrete block structure that contains an old furnace boiler remains on the
site. Other features include poured concrete building foundations and concrete floors and
platforms, brick loading docks and ramps along the railroad tracks to the south, concrete feeding
and water troughs with spigots, and concrete stair steps (Eastern Washington University, 2002).

Archaeological investigation reveals the presence of human life along the Spokane River
corridor dating back approximately 11,400 years (Spokane Centennial Trail, 2002). For
centuries, members of the Colville Confederated Tribes, Spokane Tribe, and Yakama Nation
used the Spokane River valley for hunting and gathering activities during the spring and summer
months (Spokane Tribe, 2002). In addition, Idaho's Coeur d'Alene Tribe's historic western
territory boundary reached the Spokane area. The Coeur d'Alenes established permanent
settlements along the Spokane River (Coeur d'Alene Tribe, 2002).

Searches of the Washington Cultural Resources Inventory and the National Register of Historic
Places did not identify any registered places of historic or cultural significance at or near the
proposed Stockyards project location.

Inflow Conveyance
A search of the National Register of Historic Places showed that the Felts Field Historic District
is located along the Trent Avenue Stockyards Inflow Conveyance Route, just west of the North
Valley Interceptor. The Felts Field Historic District is roughly located along Rutter Avenue
between North Fancher Road and North Dollar Road. No other places of historic or cultural
significance were identified.

Outfall Conveyance
Searches of the Washington Cultural Resources Inventory and the National Register of Historic
Places did not identify any registered places of historic or cultural significance along the
Stockyards Outfall Conveyance routes.
Alki/Fancher Alternative
Project Site
The site of the Alki/Fancher Road alternative is currently being used by Union Pacific Railroad.
This site is a remnant of what used to be extensive shops and sidings used by the Union Pacific
Railroad. Much of the original rail yard has been replaced by commercial development. What

December 2002                                                                              Page 3-73
Spokane County WWTP Final Supplemental EIS


remains consists of tracking, ballast, and both paved and dirt roads (Eastern Washington
University, 2002).

Archaeological resources are as described above for the Stockyards Alternative.
Searches of the Washington Cultural Resources Inventory and the National Register of Historic
Places did not identify any places of historic or cultural significance at or near the Alki/Fancher
Alternative location.

Inflow Conveyance
According to a search of the National Register of Historic Places, the Felts Field Historic
District, roughly located along Rutter Avenue between North Fancher Road and North Dollar
Road is located along the Alki/Fancher Inflow Conveyance Route, just west of the North Valley
Interceptor. No other places of historic or cultural significance were identified.

Outfall Conveyance
Searches of the Washington Cultural Resources Inventory and the National Register of Historic
Places did not identify any places of historic or cultural significance along the Alki/Fancher
Outfall Conveyance routes.

Rebecca Street Outfall
No historic or cultural resources are apparent at the Rebecca Street Outfall location. Because it
would be located both on the bank of the Spokane River as well as within the river, there is
potential for historic use of the site by members of the Colville Confederated Tribes, Spokane
Tribe, and/or Yakama Nation (Spokane Tribe, 2002) as well as Idaho's Coeur d'Alene Tribe.
Historic use of the area by local tribes is the same as described above for the Stockyards and
Alki/Fancher Alternatives.

Searches of the Washington Cultural Resources Inventory and the National Register of Historic
Places did not identify any registered places of historic or cultural significance at the Rebecca
Street Outfall location.

Springfield Avenue Outfall
Existing conditions at the Springfield Avenue Outfall location would be generally the same as
described for the Rebecca Street Outfall location.

The Cascade Laundry Building is located across the Spokane River from the proposed
Springfield Avenue Outfall at 604 North Superior Street. This building is listed in the State of
Washington Heritage Register (as of January 25, 2002) because of its historic industrial and
transportation significance.

Searches of the Washington Cultural Resources Inventory and the National Register of Historic
Places did not identify any registered places of historic or cultural significance at the Springfield
Avenue Outfall location.




Page 3-74                                                                              December 2002
                                                           Spokane County WWTP Final Supplemental EIS


IMPACTS

Construction
Stockyards Alternative
Project Site. The archaeological potential of this alternative is low due to heavy disturbances
that have resulted from extensive construction and years of use. Because only a remote
association with the former use of the Union Stockyards remains, the architectural integrity of
remaining structures at the former Union Stockyards location has been severely compromised.
Although the stockyards operated in Spokane for many years and were an important contributor
to the local economy, those features that remain do not appear to be eligible for listing in the
National Register of Historic Places (Eastern Washington University, 2002).

Inflow and Outfall Conveyance. Construction of the Stockyards Alternative's Trent Avenue
inflow conveyance route would occur adjacent to and/or in close proximity to the Felts Field
Historic District. Other than dust and noise, no impacts to historic structures or property would
occur as a result of construction activities.

Because of the potential for historic tribal use of the area, disturbance to resources of historic or
cultural significance are possible as a result of earth-moving construction activities at all inflow
and outfall conveyance routes.

Alki/Fancher Alternative
Project Site. The potential for prehistoric archaeology at this location is low, due primarily to
its long history of industrial and commercial development that has severely disturbed the ground
surface. Further cultural resources work at this location would include a visual survey to identify
and document surviving railroad features (Eastern Washington University, 2002).

Inflow and Outfall Conveyance. Because of the potential for historic tribal use of the area,
disturbance to resources of historic or cultural significance are possible as a result of earth-
moving construction activities at all inflow and outfall conveyance routes.

Outfall Options
Construction activities associated with the installation of the selected outfall would require
trenching into the soil along the bank and into the river for pipe and outfall port installation.
Because the selected outfall would be located along the bank of the Spokane River and within
the river itself, there is potential for disturbance of tribal resources of historic or cultural
significance at this location.

Operation
Stockyards and Alki/Fancher Alternative
No impacts to historic or cultural resources would occur as a result of operation of a wastewater
treatment plant at the Stockyards or Alki/Fancher Alternative locations.




December 2002                                                                                Page 3-75
Spokane County WWTP Final Supplemental EIS


Inflow and Outfall Conveyance
No impacts to historic or cultural resources would occur as a result of operation of any
Stockyards or Alki/Fancher outfall or inflow conveyance route option.

Outfall Options
No impacts to historic or cultural resources would occur as a result of operation of a wastewater
outfall at either the Rebecca Street or Springfield Avenue Outfall locations.

Biosolids
No impacts to historic or cultural resources would occur as a result of transport or application of
biosolids to agricultural lands.
MITIGATION MEASURES
Recommendations for further cultural resources investigations of the Stockyards and
Alki/Fancher sites would include a visual survey and subsequent report of findings, and
recordation of surviving features on a Washington State Historic Property Inventory Form.

Should cultural resources of historic significance be found during construction of any new
treatment plant component (including outfall and conveyance lines), work would immediately
stop and the appropriate agencies, including Office of Archaeology and Historic Preservation
and representatives of the Colville Confederated Tribes, Spokane Tribe, the Yakama Nation, and
the Coeur d’Alene Tribe would be contacted.




Page 3-76                                                                             December 2002
                                                             Spokane County WWTP Final Supplemental EIS



                               TRANSPORTATION
This section describes potential impacts to transportation associated with the construction and
operation of a wastewater treatment facility, and the project's consistency with adopted
transportation regulations and guidelines.
AFFECTED ENVIRONMENT
There are two treatment plant alternatives with associated conveyance systems, along with two
outfall alternatives, and several inflow and outfall conveyance options associated with the new
treatment plant. Each of these elements would have both construction and operational impacts
on neighboring streets. Potentially-affected streets are described below followed by specific
descriptions of the various project elements.

Relevant Local, State, and County Transportation Standards and Guidelines
The Spokane Metropolitan Area, Metropolitan Transportation Plan (1999) sets standards and
guidelines for transportation planning in the City of Spokane and surrounding areas. Policy
Topic 5—Transportation of the Countywide Planning Policies for Spokane County (1998) sets
policies and guidelines for regional transportation planning for Spokane County. These policies
are guided by the Growth Management Act (GMA), and encourage the coordination of land use
plans and policies through the Spokane Regional Transportation Council (SRTC) to ensure they
preserve and enhance the regional transportation system (Spokane County, 1998).

Spokane County has established Level of Service (LOS) standards for the county transportation
system. LOS for regional transportation is based on corridor travel time. Spokane County's
Comprehensive Plan (Spokane County, 2000a) has established LOS goals for transportation; the
following goals are applicable to the proposed wastewater treatment plant project:

•   Goal T.8a Establish and maintain level of service standards for roads.
•   Goal T.8d Clean streets as needed to meet air quality standards for particulate matter
       (PM).

The City of Spokane has established a Level of Service Standard/Concurrency Management
System (LOS/CMS) as part of its comprehensive planning efforts “to help manage growth and to
assure that adequate transportation facilities are in place concurrent with new development”
(City of Spokane, 2001a).

Potentially-affected Streets
See Figure 3-11 for a map of potentially-affected streets.

North Freya Way/North Freya Street is a major urban arterial. This arterial runs north-south and
is four lanes with left turn pockets at major intersections. North Freya Way/North Freya Street
has an average weekday traffic count of 24,900 between East Mission Avenue and East Trent
Avenue, and 29,000 between East Trent Avenue and East Broadway Avenue (City of Spokane,
2001c).


December 2002                                                                                 Page 3-77
Spokane County WWTP Final Supplemental EIS


East Boone Avenue is a two-lane, east-west street, mainly used by employees and users of the
industrial and commercial businesses in the area. No traffic counts are available for this street.

North Julia Street in the vicinity of the Stockyards Alternative site is a discontinuous two-lane,
north-south street that connects East Boone Avenue with East Trent Avenue. North Julia Street
right-of-way from East Boone Avenue south to the BNSF Railroad right-of-way is vacated. This
vacated portion of North Julia Street is a part of the Stockyard's Alternative parcel. The portion
of vacated North Julia Street that abuts between East Boone Avenue and the Stockyards site at its
north property line is currently vacated and is currently used as an access driveway for the
businesses that abut Julia Street to the east and west.

East Mission Avenue is a four-lane, east-west arterial with left-turn pockets at major
intersections. East Mission Avenue between North Greene Street and East Trent Road is
currently under construction. New watermains are currently being installed under East Mission
Avenue and new pavement is being laid. Construction is expected to be complete in mid- to late
October, 2002. East Mission Avenue has an average weekday traffic count of 21,300 at North
Havana Street and 22,200 at North Greene Street/North Freya Way (City of Spokane, 2001c).

North Fancher Road is a four-lane arterial with a center turn-lane in the vicinity of the project
site, narrowing to four lanes at its northern end. North Fancher Road is a moderate to heavily
used north-south thoroughfare with an average weekday traffic count of 14,505 between East
Broadway Avenue and East Alki Avenue (Spokane County, 2001e).

East Alki Avenue is a two-lane, east-west street that mainly serves the existing Union Pacific
Railroad Auto Distribution Center at the proposed Alki/Fancher treatment plant site and a US
Post Office/Distribution Center. Traffic counts are not available for this section of East Alki
Avenue.

North Koren Street is a two-lane, north-south street that connects East Alki Avenue with East
Broadway Avenue. The US Post Office/Distribution Center is located on Koren Avenue near the
project site. Traffic counts are not available for this street.

East Broadway Avenue, located approximately three blocks north of the Alki/Fancher
Alternative site, is a four-lane, east-west arterial. East Broadway Avenue provides access to the
Interstate Fairgrounds, located west of the project site. East Broadway Avenue has an average
weekday traffic count of 12,360 between North Carnahan Road and South Fancher Road
(Spokane County, 2001e).

North Rebecca Street is a north-south, gravel access road that terminates at the Spokane River at
the location of the proposed outfall. This portion of North Rebecca Street mainly serves as an
access road to the Spokane Community College parking areas. Traffic counts are not available
for this street.




Page 3-78                                                                              December 2002
                                                                     Wastewater Treatment Plant Sites
                                                                     Outfalls
                                                                     Railroad
                                                                     Streets
                                                                     Spokane River




                                                                                                                                                                                                                                                                                              N Havana St
                                                                     City of Spokane




                                                                                                                                                                                                                                             N Rebecca St
                                                                                                                                                                                                                             N Freya St
                                                                     City of Spokane Valley
                                                                     Unincorporated Spokane County
                                                                                                                                                                                                                                                                                                                                                                                                                         Av
                                                                                                                                                                                                                                                                                                                                                                                                                   tah
                                                                                                                                                                                                                                                                                                                                                                                                              EU
                                                                                                                                                                                                                                                                                  Rebecca Street
                                                                                                                                                                                                                                                                                   Outfall Option
                                                                                                                                                                                      iver                                                                                                                                                                                  d
                                                                                                                                                                                    eR                                                                                                                                                                               lroa
                                                                                                                                                                               an                                                                                                                                                                             Ra i
                                                                                                                                                                             ok                         E Ermina Av                                                                                                                                     nal
                                                                                                                                                                        Sp                                                                                                                                                                    rn   atio
                                                                                                                                                                                                                                                                                                                                        I n te




                                                                                                                                                                                                                                                     N Rebecca St
                                                                                                                                                                                                                                                                                                                             e
                                                                                                                                                                                                                                                                                                                         kan
                                                                                                                                                                                                                                                                                                                     Spo



                                                                                                                               N Perry St
                                                                                                                                                                                                                                                                                                                                        A ve
                                                                                                                                                                                                                                                                                                                               re n t
                                                                                                                                                                                                                                                                                                                          ET




                                                                                                                                                                                                                                                                    N Julia St
                                                                                                                                                                 E Mission Ave
                                                                                                   E Mission Ave                                                                                             N
                                                                                                                                                                                                                 Fr




                                                                                                                                                                 N Napa St
                                                                                                                                                                                                                                                                                  E Boone Ave




                                                                                                                                                                                                                                                                                                                                                                                               N Fancher Rd
                                                                                                                                                                                                                      ey
                                                                                                                                                                                               STOCKYARDS               a
                                                                                                                                                                                                                            Wy
                                                                                                                                                                                               ALTERNATIVE
                                                                                                                                                                                                                                                                                         ad
                                                                                                                                                                                                                                                                                 a i l ro




                                                                                                                                                                                                                                                                                                                                                                                N Koren St
                                                                                                                                                                                                                                                                    nR                                                    E Broadway Ave
                                                                                                                                                                                                                                              th e r
                                                                                                                                                                                                                                          Nor
                                                                                                                                                                                                                       to n
                                                                                                                                                                                                                  lin g
                                                                                                                                                                                                              Bur




                                                                                                                                                                                                                                                                                                            N Havana St
                                                                                                                                                                                                                                                                                                                                                                                             E Alki Av
                                                                                                                                                           E Springfield Ave
1:32700 scale




                                                                                                                                            E Trent Ave


                                                                                                                                                 Springfield Avenue
                                                                                                                                                   Outfall Option
                                                                                                                                                                                       E Sprague Ave                                       Union Pacific Railroad
L:\ENVIR IMPACTS\2000 projects\20062 SPK Co WW Plan\gis\transp.mxd




                                                                                                                                                                                                                                                                                                                          ALKI/FANCHER
                                                                                                                                              Helena St




                                                                                                                                                                                                                                                                                                                           ALTERNATIVE




                                                                            Map data shown are the property of the                                                                                                                              FIGURE 3-11
                                                                            sources listed below. Inaccuracies may
                                                                            exist, and Adolfson Associates, Inc. implies
                                                                            no warranties or guarantees regarding any
                                                                                                                                                                                                                                           TRANSPORTATION
                                                                            aspect of data depiction.
                                                                                                                           0                              0.5                                1         SPOKANE COUNTY REGIONAL WASTEWATER TREATMENT PLANT
                                                                          Source: Spokane County GIS, 2001                                                                                    Miles                                  SPOKANE, WASHINGTON
                                                                                                                                             October, 2002
Spokane County WWTP Final Supplemental EIS


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Page 3-80                                    December 2002
                                                          Spokane County WWTP Final Supplemental EIS


East Ermina Avenue is an east-west access road that separates the Spokane River from Spokane
Community College in the vicinity of the proposed outfall. East Ermina Avenue is not highly
traveled and mainly serves as an access road for Spokane Community College students and staff.
Traffic counts are not available for this street. East Springfield Avenue is a two-lane, east-west
street that carries mainly local traffic. Traffic counts are not available for this street.

North Perry Street at the outfall location is a north-south street that serves as an access driveway
for the masonry supply business near the outfall location and would be used as the access road
for the proposed new outfall. Traffic counts are not available for this street.

East Trent Avenue is a major east-west two-lane thoroughfare in the vicinity of the proposed
outfall. East Trent Avenue carries both local and through traffic along its entire length. The
Trent Avenue Bridge, located approximately four blocks west of the proposed Springfield
Avenue Outfall, will be closed through spring 2004. East Trent Avenue has an average weekday
traffic count of 10,300 between North Havana Street and North Freya Way, and 29,200 at North
Fancher Road (City of Spokane, 2001c).

North Havana Street is a north-south arterial between Interstate 90 and East Mission Avenue.
North Havana Street has an average weekday traffic count of 9,000 between East Third Avenue
and East Sprague Avenue, and 7,400 between East Sprague Avenue and East Broadway Avenue
(City of Spokane, 2001c).

East Utah Avenue is a two-lane street that serves the residential area south of the North Valley
Interceptor location. Traffic counts are not available for this street.

Stockyards Alternative
Project Site
The Stockyards site is located within the City of Spokane city limits. This site lies within an
industrial/commercial area and is bordered on the north and east by industrial and commercial
businesses. The Burlington-Northern-Santa Fe Railroad is located along the south boundary of
the project site. North Freya Way/North Freya Street is located along the west boundary of the
project site. East Boone Avenue is located one block north of the project site. A vacated portion
of North Julia Street is located between East Boone Avenue and the north property boundary.
North Havana Street is located to the east of the project site. No residential areas are located
near the proposed Stockyards project site.

Inflow Conveyance
There are three inflow conveyance routes for the Stockyards Alternative. The Julia Street option
is an alternative to the Trent Avenue route. All three routes traverse a primarily industrial and
commercial area with few residential areas or sensitive uses.

The Trent Avenue route option, however, begins at a single-family residential area near the
existing North Valley Interceptor. The route would return to industrial and commercial land uses
within less than a quarter mile from the interceptor. The route heads generally southwest using
road right-of-way up to the treatment plant site. The Trent Avenue option begins on East Utah


December 2002                                                                              Page 3-81
Spokane County WWTP Final Supplemental EIS


Avenue, turns south on North Fancher Road, west on East Trent Road, south on North Havana
Street then east into the treatment plant site (Figure 2-3).
The Julia Street route option would begin at the location of the Rebecca Street Outfall and heads
mainly south using North Rebecca Street, turns east on East Mission Avenue, south at
unimproved North Julia Street right-of-way and follows North Julia Street into the treatment
plant site. (Figure 2-3).

The Havana Street route would begin near the junction of Interstate 90 and East 2nd Avenue or
East 3rd Avenue and runs north along North Havana Street and then turns west into the treatment
plant site (Figure 2-3). This route traverses light to moderately-traveled roadways.

Outfall Conveyance
There are two outfall conveyance options for the Stockyards Alternative. Both options traverse
areas that are primarily industrial and commercial. The Rebecca Street option, that heads north
of the Stockyards site and terminates at the Rebecca Street Outfall, does not abut any residential
areas or sensitive (e.g., hospitals, nursing homes, schools) uses (Figure 2-3). The Springfield
Avenue option passes through a single-family residential area for approximately the last four
blocks before the terminus of the conveyance route.

The Rebecca Street option would run north along North Julia Street (a discontinuous north-south
street), turn west on East Mission Avenue, and turn north on North Rebecca Street. East Mission
Avenue is a heavily-used roadway. Other streets in this route are lightly used.

The Springfield Avenue option would run west along North Freya Way, turn southwest on East
Trent Avenue, west on East Springfield Avenue, and terminates at the proposed Springfield
Outfall. The east half of this route traverses a heavily-traveled roadway. The west half, along
East Springfield Avenue, is lightly-used.

Alki/Fancher Alternative
Project Site
The Alki/Fancher site is located in Spokane County within the boundaries of the newly
incorporated City of Spokane Valley. The site is currently occupied by the Union Pacific
Railroad Automobile Distribution Center (vehicles are delivered by railcar and transferred to
semi-trucks for transport to delivery sites). This site is bordered to the north by vacant property
and industrial and commercial businesses. To the east are retail/commercial businesses. To the
south is a busy retail shopping area separated from the proposed treatment plant site by three sets
of Union Pacific Railroad tracks. An abandoned gravel pit abuts the west property line. The site
is accessed from East Alki Avenue via North Fancher Road. East Alki Avenue intersects with
North Koren Street that runs north-south between East Alki Avenue and East Broadway Avenue.
East Valley Way Lane is a private road that approximately parallels the south property boundary
and terminates at a railroad maintenance area.

Inflow Conveyance
There are two inflow conveyance options for the Alki/Fancher Alternative. Both routes traverse
a primarily industrial and commercial area. As described above for Stockyard's Trent Avenue
option, a small area of single-family residential is located at the start of the route near the

Page 3-82                                                                            December 2002
                                                          Spokane County WWTP Final Supplemental EIS


existing North Valley Interceptor. The Fancher Road option traverses road rights-of-way in a
southerly direction until it reaches the treatment plant site. The Fancher Road option begins on
East Utah Avenue, turns south on North Fancher Road, and west into the site near East Alki
Avenue (Figure 2-5). North Fancher Road is moderately to heavily traveled.

The Fairgrounds option would begin at approximately Interstate 90 and East 4th Avenue, runs
north on North Havana Street for approximately 0.5 mile and then turns east immediately before
the Interstate Fairgrounds to the treatment plant site (Figure 2-5). This route traverses light to
moderately-traveled roadway.

Outfall Conveyance
There are two outfall conveyance options for the Alki/Fancher Alternative. Both options
traverse areas that are primarily industrial/commercial. The Havana Street option, that heads
mainly north and terminates at the Rebecca Street Outfall, does not abut any residential areas or
sensitive (e.g., hospitals, nursing homes, schools) uses (Figures 2-3 and 2-5). The Broadway
Avenue option passes through single-family residential for approximately the last four blocks
before the terminus of the conveyance route at the proposed Springfield Outfall.

The Havana Street option would run north from the treatment plant site to East Broadway
Avenue, then turn west on East Broadway Avenue, turn north on North Havana Street, then west
on East Mission Avenue, then north on North Rebecca Street where it terminates at the Rebecca
Street Outfall. This route mainly traverses heavy to moderately-traveled roadways, except for
lightly-traveled North Rebecca Street.

The Broadway Avenue option would run north from the treatment plant site to East Broadway
Avenue, then turn west on East Broadway Avenue to East Springfield Avenue, continue to East
Trent Avenue, and return to East Springfield Avenue where it terminates at the Springfield
Avenue Outfall. This route traverses light- to moderately-traveled roadways.

Rebecca Street Outfall
The Rebecca Street Outfall would be located along the southern shoreline of the Spokane River
at a location approximately at the intersection of North Rebecca Street and East Ermina Avenue
(Figures 2-3 and 2-5). Both streets are lightly traveled. This outfall location lies within the City
of Spokane city limits.

Springfield Avenue Outfall
The Springfield Avenue Outfall would be located along the bank of the Spokane River at the
location of an abandoned industrial property at the terminus of East Springfield Avenue on the
east side of the river (Figures 2-3 and 2-5). Access to the outfall location is by North Perry
Street (used only to access the masonry business) via East Trent Avenue, a moderate- to heavily-
traveled roadway. This outfall location lies within the City of Spokane city limits.




December 2002                                                                              Page 3-83
Spokane County WWTP Final Supplemental EIS




IMPACTS

Construction
Stockyards Alternative
Project Site. Construction activities are expected to last approximately 2.5 years. During
construction, nearby businesses could experience temporary construction-related transportation
impacts. Impacts would include movement of personal vehicles and heavy trucks into and out of
the construction site. Both personal vehicles and heavy trucks would use the local street grid (as
described under Affected Environment) and would temporarily contribute to traffic volumes and
possibly congestion in the area. During construction, approximately 250 heavy truck trips
(round trips) per day would occur. Initially, truck trips would primarily consist of removal of
excavated soil and debris from the site. As construction progresses, heavy trucks and/or trailers
would also enter and exit the site to deliver or remove construction equipment and building
materials. Traffic would be periodically stopped along affected roadways to allow heavy, large
trucks and trailers to move into and out of the site. This could result in temporary delays for
local traffic. As construction nears completion, the number of heavy trucks delivering materials
would decrease, and the main traffic into and out of the site would be personal vehicles of
construction workers. Temporary traffic detours could also occur during construction, increasing
volumes to other roadways and possibly increasing travel time for some motorists.

North Freya Way/North Freya Street would likely be used as the main north-south construction
transportation route for the Stockyards Alternative because North Freya Street avoids the busy
BNSF tracks in this area via an overpass structure. This would eliminate travel delays due to
train traffic in this area.

Site entry and exit during construction would likely occur where the vacated portion of Julia
Street enters the site from East Boone Avenue. This could create some local, short-term traffic
delays, but with appropriate mitigation (i.e., flaggers and signage) should not have a substantial
adverse effect on local traffic.

During construction adverse impacts to transportation are unavoidable, but they would be
temporary.

Inflow Conveyance. Open-trench construction would occur on East Utah Avenue, North
Fancher Road, East Trent Road/Avenue, and North Havana Street for the Trent Avenue Route.
Trench work would occur in segments and would last approximately one week for any given
block. From start of construction to repaving of roadways, each one-block segment would take
approximately four weeks. This would likely require lane reconfiguration and/or detours during
construction activities. Travel delays would also be likely during construction if the roadway is
reduced to a single travel lane requiring alternating traffic flows. Delays could also occur when
heavy equipment maneuvers across travel lanes. These delays are not expected to be lengthy.
The Trent Avenue Route is not expected to have any railroad crossings. This route follows East
Trent Avenue for a major portion of its length and would be the most affected roadway in this
option.


Page 3-84                                                                             December 2002
                                                         Spokane County WWTP Final Supplemental EIS


Construction of the Julia Street option would result in open-trench construction activities within
North Rebecca Street, East Mission Avenue, and North Julia Street. Impacts would be the same
as described above for the Stockyard's Trent Avenue inflow conveyance route. The Julia Street
option would have one railroad crossing. This route is relatively short, with East Mission
Avenue being the most affected portion of roadway due to its status as a major arterial.

Construction of the Havana Street route would result in open-trench construction activities
within North Havana Street. Impacts would be the same as described above for the Stockyard's
Trent Avenue inflow conveyance route. The Havana Street route would have two railroad
crossings. North Havana Street is a minor arterial and substantial negative construction impacts
to traffic are not expected because of their temporary and short-term nature.

During construction adverse impacts to transportation are unavoidable, but they would be
temporary.

Outfall Conveyance. Construction of the Stockyards Rebecca Street outfall option would result
in open-trench construction activities within the rights-of-way of North Julia Street, East Mission
Avenue, and North Rebecca Street. Impacts would be the same as described above for the
Stockyards Trent Avenue inflow conveyance route. For the Rebecca Street option, East Mission
Avenue would be the most affected roadway because it is a major arterial and is heavily traveled
compared to other roadways affected by this route. This option would have one railroad
crossing. These impacts are not expected to result in substantial adverse impacts to traffic in the
area.

Construction of the Springfield Avenue option would result in open-trench construction activities
within North Freya Way, East Trent Avenue, and East Springfield Avenue. Impacts would be
the same as described above for the Rebecca Street option. This option would have two railroad
crossings. North Freya Way and East Trent Avenue carry substantially more traffic than East
Springfield Avenue, but the majority of construction for this route would occur along East
Springfield Avenue, affecting this roadway for a much longer period of time than either North
Freya Way or East Trent Avenue under this option.

During construction adverse impacts to transportation are unavoidable, but they would be
temporary.

Alki/Fancher Alternative
Project Site. Transportation impacts from construction of a new sewage treatment plant at the
Alki/Fancher site would be generally the same as described above for the Stockyards site. North
Fancher Road, East Broadway Avenue, and North Havana Street are likely to be used as the
major access roads for this site and could experience up to 50 additional truck trips per day
during initial construction activities.

Inflow Conveyance. Construction of the North Fancher Road route would result in open-trench
construction within East Utah Avenue, North Fancher Road, and East Alki Avenue. This route is
not expected to have any railroad crossings. Impacts would be the same as described for the
Stockyard's Trent Avenue inflow route.


December 2002                                                                             Page 3-85
Spokane County WWTP Final Supplemental EIS


Construction of the Fairgrounds route would result in open-trench construction within North
Havana Street. This route would have one railroad crossing. Impacts would be the same as
described above for the Stockyard's Havana Street inflow conveyance route.

Outfall Conveyance. Construction of the Havana Street option would result in open-trench
construction activities within East Broadway Avenue, North Havana Street, East Mission
Avenue, and North Rebecca Street. Impacts would be the same as described above for the
Stockyard's Rebecca Street outfall conveyance option. East Mission Avenue carries the most
traffic of the affected streets, while North Havana Street has a more modest usage. Both
stretches of roadway are similar in length. This option would have two railroad crossings. East
Mission Avenue would likely be the most affected by construction impacts.

Construction of the Broadway Avenue option would result in open-trench construction activities
within East Broadway Avenue, East Springfield Avenue, and East Trent Avenue. Impacts would
be the same as described above for the Stockyard's Rebecca Street outfall conveyance option.
East Trent Avenue carries significantly more traffic than other streets in this option, but
comprises only a small portion of the Broadway Avenue option compared to the other streets.
This option would have three railroad crossings. Relative impacts would be approximately the
same for the entire length of this route.

Rebecca Street Outfall
Construction of the Rebecca Street Outfall would result in the entry and exit of construction
vehicles and equipment on North Rebecca Street from East Mission Avenue. Outfall
construction would last approximately 3 months. East Mission Avenue is a major arterial in this
area and traffic on this arterial could experience travel delays during initial construction phases
when excavated material is being removed from the site and construction materials are being
delivered. These impacts would be temporary and short in duration, and no substantial adverse
impacts are expected as a result of Rebecca Street Outfall construction activities.

Springfield Avenue Outfall
Construction of the Springfield Avenue Outfall would likely result in entry and exit of
construction vehicles and equipment from North Denver Street near the masonry business.
Construction equipment would likely be placed approximately at the intersection of East
Springfield Avenue and North Perry Street and heavy trucks would enter and exit this area to
remove excavated soil, periodically affecting local traffic.

No Action Alternative
Under the No Action Alternative, no construction-related impacts to transportation would occur.
Operation
Stockyards Alternative
Project Site. Impacts to transportation as a result of operation of a wastewater treatment plant at
the Stockyards site are expected to be minor because in general, a wastewater treatment plant
generates relatively few trips per acre. Treatment plant workers' vehicles would enter and exit
the site from North Freya Street, a fairly heavily traveled street, on a daily basis. The new
treatment plant is expected to be staffed by nine to ten approximately 12 full-time employees


Page 3-86                                                                             December 2002
                                                           Spokane County WWTP Final Supplemental EIS


during an 8-hour weekday shift, with two full-time employees staffing the plant on weekend
days (Phase 1). Estimating approximately two car/truck trips per day per employee would result
in approximately 18 to 20 24 trips per weekday and 4 trips per weekend day (approximately 100
128 trips per week during Phase 1 and approximately 130 168 trips per week during Phase 2).

In addition to vehicle trips associated with treatment plant personnel, truck trips associated with
chemical delivery would also occur. A total of approximately five round-trips per month that
would occur for chemical delivery in Phase 1. Total truck trips would be approximately seven
per month for Phase 2 operations. These truck trips are few in number and are not expected to
negatively impact local traffic volumes or travel times.

Septage haulers would also access the treatment plant during weekdays. Following project
completion, it is estimated that approximately 60 percent of the septage haulers that currently
take their loads to the SAWTP would then take their loads to the new treatment plant. This
would result in approximately 24 truck trips per day (or approximately 3 trucks per hour) would
enter and exit the treatment plant at the North Julia Street entrance. Table 3-5 below summarizes
approximate total truck trips for Phases 1 and 12.

                Table 3-5. Estimated Numbers of Vehicle and Truck Trips
                                      Chemical      Septage     Biosolids       Approximate
                     Employee
                                      Delivery      Haulers     Transport        Total/Day
    Phase 1            240/day        > <1/day                      4/day
                                                     24/day                         48 52
    (8 mgd)        (~ 12800/week)     (5/month)                  (80/month)
     Phase 2          3226/day        > <1/day         24         5-6/day
                                                                                    68 74
    (12 mgd)       (~ 16830/week)     (7/month)      36/day     (110/month)


Employee truck trips would be concentrated in the morning and afternoon hours as workers
arrive and leave for the day. Delivery trucks could enter and exit the site at any time, while it is
expected that septage hauler trips would be concentrated in the midday through afternoon hours
after they have filled their tanks.

In addition, small numbers of vehicles trips would also be generated by service vehicles for
maintenance, vendors, and visitors to the treatment plant site. These vehicle trips would not
negatively impact traffic volumes or travel times for local traffic.

Overall, operation-related treatment plant traffic would add a minor amount of traffic to existing
local traffic volumes and is not expected to negatively impact local traffic travel times.
Inflow and Outfall Conveyance. No impacts to transportation are expected as a result of
operation of any of the Stockyards inflow or outfall conveyance routes. Treatment plant workers
would periodically check the pump stations along the inflow conveyance route, but this would
not impact traffic along the route or in the vicinity of the pump station.

Alki/Fancher Alternative
Project Site. Impacts to transportation as a result of operation of a wastewater treatment plant at
the Alki/Fancher site would be the same as described above for the Stockyards Alternative. The
main entrance/exit of the Alki/Fancher site would be from East Alki Avenue via North Fancher
December 2002                                                                               Page 3-87
Spokane County WWTP Final Supplemental EIS


Road, a moderately traveled street. An entrance from East Main Avenue via North Fancher
Road may also be developed.

Inflow and Outfall Conveyance. No impacts to transportation are expected as a result of
operation of any of the Alki/Fancher inflow or outfall conveyance routes. Treatment plant
workers would periodically check the pump stations along the inflow conveyance route, but this
would not impact traffic along the route or in the vicinity of the pump station.

Rebecca Street and Springfield Avenue Outfall Options
Impacts to transportation as a result of operation of either the Rebecca Street or Springfield
Avenue Outfall would be negligible and would be limited to the occasional treatment plant
worker vehicle accessing the area for routine maintenance activities. No adverse impacts to
transportation are expected as a result of operation of either proposed outfall.

Biosolids
Biosolids would be removed from the treatment plant site on a daily basis and transported to
farmlands for disposal. Biosolids would be transported from the selected treatment plant site by
tarp-covered truck-trailer combinations. Approximately 80 heavy-truck trips per month would
occur for biosolids transport during Phase 1 operations (8 mgd capacity). Approximately 110
trips per month would occur during Phase 2 operations (12 mgd capacity). Trucks would use
major arterials and possibly Interstate 90 to transport biosolids to outlying farm areas in the
Spokane County area. Specific disposal sites would be identified at a later date.

The addition of these truck trips is not expected to have a substantial impact on local or regional
traffic volumes because they would be spread out over the course of a regular work day and
would generally not occur during peak traffic hours.

No Action Alternative
Under the No Action Alternative, no operation-related impacts to transportation would occur as
no new treatment plant facility would be constructed.
MITIGATION MEASURES

Construction
Mitigation measures that could be implemented to minimize construction-related impacts to
transportation could include the following:

•   Develop a traffic control plan to ensure continued vehicular access on streets in the project
    vicinity;
•   Flaggers to control and coordinate traffic flow;
•   Signage to alert drivers to the presence of construction activities; and
•   Traffic cones or barrels to direct traffic away from construction areas and into appropriate
    travel lanes.
Operation
No substantial operation-related impacts are expected to occur, therefore no long-term
transportation mitigation measures are proposed.

Page 3-88                                                                             December 2002
                        Spokane County WWTP Preliminary Draft SEIS



        CHAPTER 4. COMMENTS AND RESPONSES




December 2002                                              Page 4-1
Spokane County WWTP Final Supplemental EIS

                                             COMMENT LETTER NO. 1




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Page 4-2                                               December 2002
                                                 Spokane County WWTP Preliminary Draft SEIS

RESPONSES TO COMMENT LETTER NO. 1---Army Corps of Engineers

1. As noted in the Fact Sheet (p. FS-ii) of the Final Supplemental EIS, the County will obtain a
Section 404 permit for outfall construction and anticipates a Nationwide Permit 7 because the
outfall will be in compliance with the National Pollution Discharge Elimination System
(NPDES) Program. Also, as noted on p. 3-21 of the Final Supplemental EIS, the County will
comply with all Corps permit requirements for installation of the outfall.




December 2002                                                                            Page 4-3
Spokane County WWTP Final Supplemental EIS


                                             COMMENT LETTER NO. 2




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                Spokane County WWTP Preliminary Draft SEIS




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Page 4-6                                         December 2002
                                                  Spokane County WWTP Preliminary Draft SEIS

RESPONSES TO COMMENT LETTER NO. 2—Washington Department of Ecology

1. In addition to the SEPA process for which Spokane County is the lead agency, the project
must comply with the State Environmental Review Process (SERP) because funding is being
sought from the State Revolving Fund. The Director of the Department of Ecology must provide
written concurrence with the Final Supplemental EIS under SERP (Chapter 173-98-100 WAC).

2. There will be no direct federal funding for this project. Funding will come from the State
Revolving Fund. It is the County's understanding that under SERP, Section 106 consultation is
not required since there is no federal lead agency. Tribal and historic preservation consultation is
satisfied through SERP (Chapter 173-98-100 WAC) and has been initiated for this project.
Documentation of contacts is provided in Appendix B of the Final Supplemental EIS.

3. The Baseline General Permit for Storm Water Discharges Associated with Industrial
Activities has been added to the permit list in the Fact Sheet of the Final Supplemental EIS (p.
FS-ii). Spokane County will apply for this permit prior to beginning construction.

4. Comment noted. The title of Figure 2-1 will be corrected to read North Spokane Planning
area.

5. Because of concerns with chlorine toxicity in the Spokane River, the current plan for
disinfection at the treatment plant is ultraviolet radiation and not chlorine (see p. 3-20 of the
Final Supplemental EIS). Should the County decide to use chlorine disinfection at a future time,
additional environmental review would be conducted.

6. Volatile organic compounds are discussed on p. 3-8 of the Supplemental EIS. The County
will implement several measures to either prevent or detect the presence of illegal volatile
substances. Prevention will be addressed through the pretreatment program that will prohibit the
discharge of these materials and will include monitoring and enforcement measures. Detection
will be provided by installing low explosive limit (LEL) monitors in the influent pumping
stations and headworks to detect flammable substances. In addition, a conductivity meter will be
installed in the plant headworks to detect any sudden changes in water chemistry. All monitors
will be equipped with alarms and tied to a centralized warning SCADA system. The SCADA
system would detect any problems with the system and alert plant operators.

7. Page 3-29 discusses the potential for spills of water treatment chemicals at the treatment
plant because that is the only place where such chemicals would be stored. The potential for
leaks of untreated sewage would be possible at any point along the inflow conveyance route and
is discussed on p. 3-29. Likewise, the leaking of treated effluent is discussed on page 3-19. In
addition, the potential for spills and leaks of hazardous materials at any point in the wastewater
treatment system is discussed in the Environmental Health section, page 3-39 and 3-40.

8. As discussed in the response to Comment 5 and on page 3-20 of the Final Supplemental EIS,
the effluent will not be chlorinated at the wastewater treatment plant to avoid chlorine toxicity
problems in the Spokane River. However, future conditions could cause a reconsideration of the
benefits of chlorine disinfection compared to ultraviolet disinfection. If the County decides to


December 2002                                                                               Page 4-7
Spokane County WWTP Final Supplemental EIS


consider chlorine disinfection in the future, additional environmental review would be
conducted at that time.

9. The permit requirements for biosolids has been added to the list of permits in Fact Sheet of
the Final Supplemental EIS. Spokane County will apply for the appropriate permits and will
conduct additional environmental review, if required, prior to completion of the wastewater
treatment plant. The permit requirements will also be addressed in the Wastewater Facility Plan
Amendment.

10. As noted on page 3-41 of the EIS, hazardous materials on site will be handled in accordance
with applicable state and federal standards and regulations. It is not anticipated that the
wastewater treatment plant will generate regulated quantities of hazardous or dangerous waste as
defined in Chapter 173-303b WAC.

11. Comments on contacts for permits are noted.




Page 4-8                                                                           December 2002
                Spokane County WWTP Preliminary Draft SEIS

                              COMMENT LETTER NO. 3




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December 2002                                        Page 4-9
Spokane County WWTP Final Supplemental EIS


RESPONSES TO COMMENT LETTER NO. 3—State Office of Archaeology and Historic
Preservation

1. Spokane County will conduct additional archaeological surveys prior to construction at the
selected treatment plant and outfall locations.

2. Tribal consultation has been initiated as part of the State Environmental Review Process
(SERP). Copies of the Draft Supplemental EIS and letters requesting comments under SERP
were sent to the Spokane Tribe of Indians, the Yakama Tribal Council, the Colville Tribe, and
the Coeur d'Alene Tribe. No responses have been received from any of the tribes contacted.
Documentation of the consultation is included in Appendix B of the Final Supplemental EIS.

3. As noted in the response to Comment # 2 in Comment Letter # 2 above, there will be no
direct federal funding for this project. Funding will come from the State Revolving Fund. Under
SERP, there is no requirement for Section 106 consultation because there is no federal lead
agency. Tribal and historic preservation consultation is satisfied through SERP (Chapter 173-98-
100 WAC) and as noted in the response to your second comment, has been initiated for this
project.

4. Comment noted. Thank you for your input.




Page 4-10                                                                          December 2002
                Spokane County WWTP Preliminary Draft SEIS

                              COMMENT LETTER NO. 4




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December 2002                                     Page 4-11
Spokane County WWTP Final Supplemental EIS


RESPONSES TO COMMENT LETTER NO. 4—Spokane County Air Pollution Control
Authority

1. Your comment on the sufficiency of the Supplemental EIS in addressing the air quality
concerns is noted.

2. As noted on page FS ii of the Supplemental EIS, the County will apply for the Notice of
Construction required under SCAPCA prior to construction.

3. Odor control measures and backup engine generators proposed for the two influent pump
stations will be reviewed to determine if they need an NOC. If a diesel engine generator is
included at the treatment plant site, the County would work with SCAPCA to meet air quality
regulations.

4. The County will work with SCAPCA to ensure that construction mitigation measures,
including those for dust control, are adhered to.

5. The County will continue to work with SCAPCA to ensure that the operation mitigation
measures are appropriate and meet the NOC requirements.




Page 4-12                                                                         December 2002
                Spokane County WWTP Preliminary Draft SEIS
                               COMMENT LETTER NO. 5




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December 2002                                      Page 4-17
Spokane County WWTP Final Supplemental EIS


RESPONSES TO COMMENT LETTER NO. 5—City of Spokane Public Works and Utilities

1. Your comments about the difficulty of siting a wastewater treatment plant are noted.

2. Your comments on the membrane filtration process, viral monitoring and control of impacts
are noted and are discussed in more detail in responses to your additional comments.

3. The intent of the statement in the Supplemental EIS that the wellhead protection measures
have not been finalized were intended to indicate that there are no specific protection
requirements in place yet. It was not intended to imply that the County would ignore wellhead
protection. The County intends to work with the City to minimize the potential for impacts to
the City's wells. One of the intended benefits of the County's septic tank elimination program is
to help protect the water quality in the Spokane Valley Aquifer and the City of Spokane's wells.
Construction of the new treatment plant is part of the aquifer protection program.

4. As noted on page 3-25 of the Supplemental EIS, the Alki/Fancher site is located over a
narrow finger of the 1-year protection zone.

5. The relationship of the Rebecca Street outfall site to the wellhead protection area is discussed
on pages 3-29 to 3-31 of the Supplemental EIS. More information on the impacts of locating the
outfall at the Rebecca Street location is provided in responses to some of your following
comments.

6. The County received a letter from the City dated April 19, 2002 as part of the scoping
process for the EIS. The County met with the City to understand the comments expressed in that
letter. A special study was undertaken to address the City’s concerns. A draft report, entitled
“Potential Impacts of Spokane County Wastewater Discharge on the City of Spokane Well
Water Quality” was transmitted to Lloyd Brewer, Environmental Programs Manager for the City
on October 17, 2002. A meeting with city staff followed to address outstanding issues. The
report is referenced in the Final supplemental EIS and is available on the County’s website.

7. Spokane County has wastewater personnel on standby status 24 hours per day to respond to
emergencies. All new pumping stations will include monitoring systems with automatic dialer
alarms for failures. The emergency response manual will be updated to include measures that
will be taken at the pump stations and force mains in the event of a failure. Contracts are in
place with additional private contractors to respond to emergencies.

Force mains for wastewater are commonly constructed of ductile iron. It is anticipated that
existing cross connection controls by water purveyors will be adequate to limit the risk of an
improper connection. In addition, warning tapes can be placed in the trench backfill above the
pipelines.

8. As discussed on page 2-3 of the Final Supplemental EIS, the proposed method of discharge
to the Spokane River is through a single port outfall with an invert located approximately 5 feet
above the lowest point in the river channel. The top of the outfall would be below the water
surface during low flow events in the river.


Page 4-18                                                                            December 2002
                                                  Spokane County WWTP Preliminary Draft SEIS

No effluent would be discharged directly to groundwater. While the County remains interested
in groundwater recharge as a long-term effluent management technique, it recognizes that more
work is needed to address a range of technical, regulatory, and public acceptance issues
associated with this concept.

In the stretch of river below the proposed outfall locations, the interactions between the river and
aquifer are not well understood. County personnel believe that these interactions are more
complex than indicated by the steady-state assumptions, but there are insufficient data to
generate a more sophisticated model. This uncertainty makes it difficult to assess the relative
impacts of alternative outfall locations on groundwater that could potentially reach production
wells. Because of this uncertainty, the County's approach has been to demonstrate that discharge
of effluent at either outfall location would be protective of public health. The results of this
study are presented in a report entitled "Potential Impacts of Spokane County Wastewater
Discharge on City of Spokane Well Water Quality" that was provided to the City.

9. The Stockyards Alternative location is one of many vacant industrial properties in the City of
Spokane. The loss of the Stockyards site for potential development was acknowledged in the
EIS, but was not determined to be a significant impact since there is currently available industrial
properties and other properties are available for industrial development. The mitigation
measures listed on page 3-59 are intended to address the construction impacts of the project. No
operational land use impacts were identified, therefore there are no operational mitigation
measures provided.

With regard to Step 7 of the Model Siting Process, loss of tax revenues is acknowledged,
however, the siting of the treatment plant at the Stockyards location could be a public benefit for
the City. In the past, the City has expressed interest in sending future wastewater flows to the
Spokane County Regional Wastewater Facility. The preferred site at the Stockyards location
would be advantageous for future City use of the plant and could reduce the City's costs of
treating additional wastewater flows.

10. The capacity of the SAWTP (page 1-2) has been corrected in the Final Supplemental EIS.

11. The Spokane County septic tank elimination program is presently scheduled for completion
within the Urban Growth Area (UGA) by 2010. At that time, nearly all septic tanks in the UGA
would be replaced by a connection to the regional wastewater system. No new septic tanks
would be approved within the UGA in compliance with the adopted Countywide Planning
Policies and the Spokane County Phase One Development Regulations.

12. SEPA does not require that a cost analysis be conducted. A cost analysis was conducted as
part of the Wastewater Facilities Plan. The recommendation to build a new regional plant was
based on many factors, as discussed in the Facilities Plan. A cost-effectiveness analysis
summarized on page 2-4 for the purposes of compliance with the State Environmental Review
Process.

13. As noted in the response to comment # 11 above, the County is committed to the septic tank
elimination program. At the beginning of the wastewater facilities planning process, County


December 2002                                                                              Page 4-19
Spokane County WWTP Final Supplemental EIS


staff and City of Spokane staff coordinated projections on growth and wastewater flows,
including flows from decommissioned septic tanks, within the Urban Growth Area for the
planning period to ensure that adequate wastewater treatment capacity would be available for all
of the jurisdictions within the planning areas. The projections included growth in the newly
incorporated City of Spokane Valley and the Yardley area. Projections indicate that the existing
City of Spokane Advanced Wastewater Treatment Plant (SAWTP) and the new Spokane County
Regional Wastewater Treatment Plant, will provide adequate capacity to accommodate the
growth projected in the Urban Growth Areas.

14. A recent value engineering study suggested eliminating the gravity thickeners and providing
primary sludge thickening in the primary clarifiers. The County has accepted this suggestion and
the Final Supplemental EIS has been revised to reflect this change (page 2-2).

15. The number and size of membrane bioreactor (MBR) facilities used for wastewater treatment
is increasing. Although most installations to date have been smaller than the proposal for
Spokane County, there are several facilities of similar or larger capacity that have recently
started up or are in development. By the time the Spokane County treatment plant is completed
(2007), it is anticipated that there will be many MBR facilities of similar or larger size in
operation.

With respect to sludge production, the MBR process would likely operate with a sludge age of
15 to 20 days. By comparison, a more conventional activated sludge process that provides
nitrification and denitrification would operate at a sludge age of about 8 to 10 days. It is
anticipated that the longer sludge age in the MBR would result in a sludge yield that is about 10
percent lower than the conventional process (e.g., the MBR would produce about 10 percent less
waste activated sludge (WAS)). For both process options, however, the WAS would be
subsequently stabilized using anaerobic digestion which reduces the biodegradable material in
the sludge. Since the WAS produced by the conventional process would have higher
biodegradable content than the MBR WAS, the digesters would achieve a greater solids
reduction for the conventional process WAS. The net result is that, following digestion, both
processes would be expected to produce similar amounts of stabilized solids. The amount of
solids produced by the conventional process may be slightly higher than that for the MBR, but it
appears that the difference would be less than 5 percent. Given this situation, it appears that use
of the MBR process would not concentrate undesirable contaminants in the biosolids to the point
that land application of the biosolids would be jeopardized.

16. Comment acknowledged. Site selection for biosolids disposal will occur in a future phase of
the project and will likely result in disposal sites south of the urban area, separate from the sites
being used by the City of Spokane which are west of the urban area.

17. The estimate of staffing levels in the Supplemental EIS are those for operation and
maintenance of the treatment plant. The levels for this staffing have been increased from the
estimates in the Draft Supplemental EIS (see page 2-3 of the Supplemental EIS). The staffing
levels do not include those required for pretreatment. The County will meet its obligations for
industrial pretreatment as described in Spokane County Code Title 8 Health and Sanitation. The
County currently contracts with the City of Spokane to provide the necessary staffing to


Page 4-20                                                                              December 2002
                                                  Spokane County WWTP Preliminary Draft SEIS

administer the pretreatment program. The County has not decided whether to continue
contracting with the City or to develop its own pretreatment capabilities.

18. Cost analyses are not a part of the SEPA process. The section on cost effectiveness is
included in the Final Supplemental EIS for the purposes of the State Environmental Review
Process (SERP) which requires a cost effectiveness evaluation. Because the County intends to
apply for State Revolving Funds to finance a portion of the construction of the new wastewater
treatment facilities, a summary of the cost effectiveness analysis is included in the Final
Supplemental EIS in compliance with SERP guidelines.

It should also be noted that the selection of the treatment processes and alternatives was based on
anticipated future water quality considerations in the Spokane River rather than on current cost
considerations alone.

19. The biofilters will be lined and a drainage system will be installed to collect any water that
drains through the beds. The drainage will be returned to the treatment plant for processing.

20. The County has not yet determined how the biogas produced from the digesters will be used.
Options include energy recovery techniques such as generators, microturbines and fuel cells;
using the heat content to heat the digesters; and flaring excess biogas. Once a technique is
selected, all necessary air quality permits will be obtained and complied with. Equipment will be
maintained in proper working order to minimize incomplete combustion.

21. The statement on page 3-11 of the EIS has been amended to clarify that if the plant capacity
at SAWTP is exceeded, increased odors could be anticipated.

22. The comment is correct. The units on Table 3-1 (pages 3-16 to 3-17) have been changed to
micrograms per liter.

23. The anticipated phosphorous limit of 0.5 mg/L (Table 3-1, page 3-16) was based on
discussions with Ecology personnel. It reflects an estimated limit in the initial NPDES permit
prior to resolution of the dissolved oxygen TMDL. Based on an anticipated influent
phosphorous concentration of 6 mg/L, this represents a 92 percent removal efficiency, which is
higher than that currently required for other dischargers to the Spokane River. The County
recognizes that the dissolved oxygen TMDL process may result in much lower wasteload
allocations for phosphorous which would be reflected in future permit limits. For this reason, the
County has selected technologies that could achieve effluent phosphorous concentrations of less
than 0.1 mg/L.

24. The statement on page 3-17 refers to surface water bodies. Groundwater impacts are
discussed in the following section of the EIS (pages 3-22 to 3-31).

25. The possibility of increasing capacity at the SAWTP above the 10 MGD limit was
considered as an alternative in the Wastewater Facilities Plan and its programmatic EIS. The
alternative was not selected by the County because the evaluation of all the treatment plant



December 2002                                                                               Page 4-21
Spokane County WWTP Final Supplemental EIS


alternatives based on the selection criteria concluded that the preferred alternative is to construct
a new regional treatment plant as discussed in the Wastewater Facilities Plan.

26. The Final Supplemental EIS has been amended to indicate that the County will not apply
biosolids to agricultural lands or reclaimed mining sites that overlie the Spokane Valley-
Rathdrum Prairie Aquifer (page 3-26).

27. The statement on page 3-40 of the Final Supplemental EIS has been revised to clarify the
types of materials that could be discharged to the river in the event of a plant failure. Untreated
effluent could contain constituents that exceed the discharge limits and may not meet water
quality standards. The Spokane County Code (Title 8 Health and Sanitation) regulates the types
of materials that can be discharged to the sewer system and includes dangerous wastes as defined
by Chapter 173-303 WAC and other hazardous materials (Title 8.03.4000). These regulations
would limit the types of discharges that would occur to the plant under normal operations.

28. A statement has been added to page 3-66 about the potential impacts to recreational
watercraft users.

29. The East Central Neighborhood Council submitted their comments to the County and the
comments and responses are included in this document.

30. The County will continue to work with the City to resolve these issues as the project
continues.




Page 4-22                                                                              December 2002
                Spokane County WWTP Preliminary Draft SEIS
                             COMMENT LETTER NO. 6




                                              1




                                              2




                                              3




December 2002                                     Page 4-23
Spokane County WWTP Final Supplemental EIS




                                              4




                                              5

                                              6




                                              7



                                              8

                                              9


                                              10




Page 4-24                                    December 2002
                                                   Spokane County WWTP Preliminary Draft SEIS

RESPONSES TO COMMENT LETTER NO. 6—East Central Neighborhood Steering
Committee/Council

1. Your concerns about the siting of the wastewater treatment plant and mitigation measures are
acknowledged.

2. It is the intent of the County to minimize odors and air pollution through the design of the
treatment plant. The details of the design will be developed once a plant location has been
selected. Odor producing facilities will be enclosed and the air from them will be treated to
minimize odor.

3. It is the County's intention to utilize the ultraviolet disinfection procedure to avoid chlorine
toxicity issues in the Spokane River. If it became necessary to use chlorine at the treatment
plant, the form of chlorine would be liquid, not the more hazardous chlorine gas. If
consideration is given to the use of chlorine in the future, additional environmental review would
occur at that time.

4. It is planned and anticipated that truck traffic to and from the treatment plant will utilize
arterials and distributor streets in the adjacent industrial neighborhood rather than residential
streets.

5. Details of the lighting for the treatment plant will be developed during final design. Possible
mitigation measures that could be used are discussed on page 3-76 and include horizontal baffles
or cut-offs that would direct light toward the ground.

6. The chain link fence is included as part of the site plan because some measures will be
necessary to secure the plant site. The County will work with the community to address
concerns about the type of fencing.

7. The County intends to have alternate power sources so that the plant will remain operational
during a power outage. Avista will be providing two separate power sources to the plant. In
addition, the County is considering emergency generators at the site to provide additional back-
up in the event of a regional power failure.

8. The County is committed to the mitigation measures described in the EIS. As part of the
State Environmental Review Process, the mitigation measures identified in the EIS would
become conditions of the State Revolving Fund loan agreement used to finance the construction
of the treatment plant.

9. It is the County's intention to develop spill control plans for all phases of construction and for
the operation of the plant.

10. Your comments are appreciated. The County will continue to work with the East Central
Neighborhood Council to address your concerns during design and construction of the treatment
plant.



December 2002                                                                               Page 4-25
Spokane County WWTP Final Supplemental EIS

                                             COMMENT LETTER NO. 7




                                                             1

                                                             2

                                                             3


                                                             4

                                                             5




Page 4-26                                               December 2002
                                                   Spokane County WWTP Preliminary Draft SEIS

RESPONSES TO COMMENT LETTER NO. 7—Jim Randall, Kim Hotstart

1. The street to the north of the Alki/Fancher site is Alki Street, a public street (see Figure 2-4
in the EIS). It is acknowledged that the road running north from Alki Street to Broadway is a
private roadway. The treatment plant would not be accessed via the private road.

2. The planned access for the Alki/Fancher site is Alki Street (see page 3-94 of the EIS).
Trucks accessing the treatment plant are expected to use Fancher Road. In addition, an access to
the site from Fancher Road is anticipated. Traffic generated by the treatment plant is expected to
be approximately 52 vehicle or truck trips per day for Phase 1 and 74 trips per day for Phase 2
(see page 3-93 of the EIS). This increased traffic on Alki Street and/or Fancher Road is not
expected to be a major impact to traffic in the area.

3. The potential for encountering contaminated materials is discussed on pages 3-35 and 3-36 of
the EIS.

4. As noted in the EIS, the length of conveyance lines from the Alki/Fancher site is longer than
from the Stockyards Alternative site.

5. Information about railroad crossings have been added to the transportation section of the
Final Supplemental EIS. Please refer to the Impacts subsection of the Transportation section of
this document (pages 3-90 through 3-92).




December 2002                                                                               Page 4-27
Spokane County WWTP Final Supplemental EIS

                                             COMMENT LETTER NO. 8




                                                             1




Page 4-28                                               December 2002
                                                Spokane County WWTP Preliminary Draft SEIS

RESPONSES TO COMMENT LETTER NO. 8—Velma Churchill

1. Your comments concerning the jurisdictional location of the treatment plant are not directly
related to issues of the EIS. Your comments have been received by the County and will be used
in its final site selection evaluation.




December 2002                                                                          Page 4-29
                                                       Spokane County WWTP Final Supplemental EIS




                       CHAPTER 5. REFERENCES
City of Spokane. 1982. Shoreline Master Program Supplement. Use Regulations and
        Administrative Procedures.

City of Spokane. 1994. Critical Areas Report. City of Spokane Department of Planning
        Services.

City of Spokane. 2001a. Combined Sewer Overflow Reduction. Located at
        http://www.spokanewastewater.org/csoinfo.asp.

City of Spokane. 2001b. Final Comprehensive Plan and Draft Environmental Impact Statement,
        an integrated GMA and SEPA Document, 2000-2020 (dated March 23, 2001). Adopted
        May 21, 2001.

City of Spokane. 2001c. Spokane Municipal Code, Land Use. City of Spokane, Planning
        Services Department.

Coeur d'Alene Tribe. 2002. Ancestral Lands. Located at http://www.cdatribe.com in September
       2002.

Eastern Washington University. 2002. Letter Report regarding cultural/historic resources.
       Prepared by Stephen Emerson, Projects Manager, Archaeological and Historical Services.

Ecology. 1999. 1999 Air Quality Trends in Washington. Prepared by the Washington State
      Department of Ecology Air Quality Program.

Ecology. 2000. Water Reclamation and Reuse: The Demonstration Projects. Washington State
      Department of Ecology, Publication 00-10-062.

HDR Engineering, Inc. 2002. Potential Impacts of Spokane County Wastewater Treatment
     Plant Discharge on City of Spokane Well Water Quality. December 2002.

HDR Engineering, Inc. and Limno-Tech, Inc. 2002. Technical Memorandum Assessment of
     Dissolved Oxygen Impact from Proposed Wastewater Discharge.

Limno-Tech, Inc., 2002a. Draft Mixing Zone Study Report for the Proposed Spokane County
      Discharge to the Spokane River, Washington. August 7, 2002.

Limno-Tech, Inc. 2002b. Memorandum Draft Modeling of Dissolved Oxygen in the Spokane
      River in Response to Effluent from the Proposed Spokane County WWTP Discharge near
      Hamilton Street.

Miller, Stan. 1996. Unpublished report on hydraulic connectivity of the Spokane River.
        Spokane Water Quality Management Program GIS.

National Marine Fisheries Service. 2002. ESA Listing Maps. Accessed at
       http://www.nwr.noaa.gov/1salmon/salmesa/mapswitc.htm on October 3, 2002.

December 2002                                                                            Page 5-1
Spokane County WWTP Final Supplemental EIS


Spokane County. 1994. Countywide Planning Policies for Spokane County. Spokane County
      Growth Management Program, adopted December 22, 1994.

Spokane County. 1996. Growth Management Essential Public Facilities Technical Committee
      Report. Spokane, Washington.

Spokane County. 1996. Critical Areas Ordinance for the Protection of Wetlands, Fish and
      Wildlife Habitats, and Geo-hazard Areas. Spokane County Code. Chapter 11.20.

Spokane County. 1998. Zoning Code of Spokane County, Washington. Public Works
      Department. Building Planning Division. Spokane, Washington.

Spokane County. 2000a. Spokane County Comprehensive Plan, Planning Commission
      Recommendation.

Spokane County. 2001a. Construction Projects Status Report. Spokane County Public Works,
      Web page edition, 2/2/2001.

Spokane County. 2001b. Spokane County Draft Wastewater Facilities Plan. Prepared by HDR
      Engineering.

Spokane County. 2001c. Spokane County Wastewater Facilities Plan. Basis of Planning
      Report. Draft. Prepared by HDR Engineering.

Spokane County. 2001d. Year 2000 Comprehensive Wastewater Management Plan (CWMP).

Spokane County Air Pollution Control Agency (SCAPCA). 2002a. The SCAPCA Web site
      located at http://www.scapca.org/spokane_air.html on August 15, 2002.

Spokane County Air Pollution Control Agency (SCAPCA). 2002b. Air Quality Index data on
      the SCAPCA Web site located at http://www.scapca.org/cgi-bin/airquality.pl March 2001
      and August 2002.

Spokane Tribe. 2002. History of the Spokane. Located at
      http://www.spokanetribe.com/tribe/history01.htm on August 16, 2002.

Texas Water Resources Research Institute. 1986. How Safe are Septic Tanks? Texas Water
      Resources. Vol. 12, No. 2.

URS Corporation. 2002. Wetland and Critical Habitat Reconnaissance Report for Spokane
     County, Division of Public Works.

U.S. Department of Energy. 2000. How to Select an Energy-Efficient Centrifugal Pumping
       System. Located at http://www.eren.doe.gov/femp/procurement/pdfs/pump.pdf.

U.S. Environmental Protection Agency (EPA). 2002. Source Water Basics. Located at
       http://www.epa.gov/safewater/protect/swbasics.html#Anchor-What-49575.



Page 5-2                                                                        December 2002
                                                      Spokane County WWTP Final Supplemental EIS


U.S. Fish and Wildlife Service (USFWS). 2002. Written response to request for information on
       sensitive species. June 28, 2002.

U.S. Geological Survey (USGS). 2002. Water Resources Data for Washington. Located at
       http://water.usgs.gov/wa/nwis.

Washington Department of Ecology. 1995. Little Spokane River Watershed Initial Assessment.
      May 1995. Olympia, Washington.

Washington Department of Fish and Wildlife (WDFW). 2002. Habitats and species Maps for
      Dartford, Greenacres, and Spokane Northeast, Northwest, Southeast, and Southwest
      Quadrangles. Report dated September 27, 2002.

Washington Department of Health and Washington Department of Ecology. 1997. Water
      Reclamation and Reuse Standards. Olympia, Washington.

Washington Department of Transportation. 1995. Final Environmental Impact Statement North
      Spokane Freeway.




December 2002                                                                           Page 5-3
                                                                Spokane County WWTP Final Supplemental EIS




                      CHAPTER 6. DISTRIBUTION LIST
Dale Arnold                                John Mercer, Director               Dave Nakagawara, Acting Director
City of Spokane Wastewater Services        City of Spokane Planning Services   City of Spokane
909 E. Sprague                             Third Floor, City Hall              Engineering Services
Spokane WA 99202                           808 W. Spokane Falls Blvd.          808 W. Spokane Falls Blvd.
                                           Spokane, WA 99201                   Spokane, WA 99201

Kevin Cooke                                Stan Miller                         Ty Wick
Spokane County Utilities                   Spokane County Utilities            Spokane County Water District #3
Public Works Building                      Public Works Building               Spokane Joint Aquifer Board
1026 W. Broadway                           1026 W. Broadway                    PO Box 11187
Spokane WA 99260                           Spokane WA 99260                    Spokane, WA 99211

Eric Skelton                               Spokane County Div. of Planning     Ross Kelley, P.E., Engineer
Spokane Co. Air Pollution Control Agency   Public Works Building               Spokane County
1101 W. College Avenue                     1026 W. Broadway                    Engineering & Roads Div.
Spokane WA 99202                           Spokane WA 99260-0240               1026 W. Broadway
                                                                               Spokane WA 99260-0170

                                                                               Spokane County Library
 Walt Edelen                               City of Spokane Library
                                                                               Argonne Branch
 Spokane Conservation District             Downtown Branch
                                                                               4322 North Argonne
 210 N. Havana                             906 W. Main Avenue
                                                                               Spokane WA 99212
 Spokane WA 99202                          Spokane WA 99201



Spokane County Library
                                           Spokane County Library              Spokane County Library
Valley Branch
                                           Otis Orchards Branch                North Spokane Branch
12004 E. Main
                                           22324 E. Wellesley                  44 E. Hawthorne Road
Spokane WA 99206
                                           Otis Orchards WA 99027              Spokane WA 99218

Washington State Dept. of Ecology (2)      Ken Merrill                         Jerry Anderson
Environmental Review Section               Washington State Dept. of Ecology   Washington State Dept. of Ecology
PO Box 47703                               Water Quality Division              Reuse Division
Olympia WA 98504-7703                      4601 N. Monroe, Suite 202           4601 N. Monroe, Suite 202
                                           Spokane WA 99205                    Spokane WA 99205


Cal Ferguson                               Tim Schultz                         Tom Tebb
Washington State Dept. of Ecology          Washington State Dept. of           Washington State Dept. of Ecology
Facility Planning Division                 Agriculture                         Shorelines and Wetlands Division
4601 N. Monroe, Suite 202                  222 N. Havana                       4601 N. Monroe, Suite 202
Spokane WA 99205                           Spokane WA 99202                    Spokane WA 99205


George Schlenger                           Pat McGuire                         Craig Riley
Washington State Dept. of Ecology          Washington State Dept. of Ecology   Washington State Dept. of Health
Water Rights Division                      Biosolids Division                  Drinking Water Division
4601 N. Monroe, Suite 202                  4601 N. Monroe, Suite 202           1500 W. 4th Avenue, Ste. 305
Spokane WA 99205                           Spokane WA 99205                    Spokane WA 99204




December 2002                                                                                        Page 6-1
Spokane County WWTP Final Supplemental EIS



 Jim Bellatty                             Mark Schulz, Env. Specialist       Ben Cope
 Washington Dept. of Ecology              WA State Parks                     Environmental Protection Agency
 Ecology Eastern Regional Office          Eastern Region Office              Water Division
 Water Quality Division                   2201 North Duncan Drive            1200 6th Avenue, MS OW-134
 N. 4601 Monroe, Suite 202                Wenatchee, WA 98801-1007           Seattle WA 98101
 Spokane WA 99205

 Tim Erkel                                Karin Divens
                                                                             Arnie Johnson
 District Corps of Engineers              Washington State Dept. of Fish &
                                                                             Washington State Dept. of Nat.
 P.O. Box 273                             Wildlife
                                                                             Resources / Northwest Region
 Chattaroy WA 99003                       N. 8702 Division Street
                                                                             P.O. Box 190
                                          Spokane WA 99218
                                                                             Colville WA 99114-0190

 Chris Miller                             Lee Mellish                        Susan Martin
 Soil Conservation Service, NRCS          Liberty Lake Sewer & Water         Upper Columbia River Fish &
 1908 N. Dale Lane                        District No. 1                     Wildlife Ofc.
 Spokane WA 99202                         22510 E. Mission                   US Fish and Wildlife Service
                                          Liberty Lake WA 99019              1103 E. Montgomery Drive
                                                                             Spokane, WA 99206-4779

 Jerry Numbers (2)                        Rick Fink                          Pat Blau
 East Central Neighborhood Association    Inland Empire Paper                Kaiser Aluminum
 611 S. Arthur                            3320 N. Argonne Rd                 P.O. Box 15108
 Spokane WA 99202                         Spokane WA 99212                   Spokane WA 99215


 Commissioner John Roskelley              Commissioner Kate McCaslin         Commissioner Phil Harris
 Office of Spokane County Commissioners   Office of Spokane County           Office of Spokane County
 1116 W. Broadway                         Commissioners                      Commissioners
 Spokane WA 99260                         1116 W. Broadway                   1116 W. Broadway
                                          Spokane WA 99260                   Spokane WA 99260

 Daniela Erickson, Clerk of the Board
                                          The Honorable Joseph A. Pakootas   The Honorable Ross Sochzehigh
 Office of Spokane County Commissioners
                                          Colville Business Council          Yakama Tribal Council
 1116 W. Broadway
                                          P.O. Box 150                       P.O. Box 151
 Spokane WA 99260
                                          Nespelem, WA 99155                 Toppenish, WA 98948


 Alfred Nomee, Director                   Brian Crossley                     Ronald Blount
 Coeur D’Alene Tribe                      Spokane Tribe of Indians           Chief Garry Park Neighborhood
 Natural Resources Department             P.O. Box 100                       Association
 P.O. Box 408                             Wellpinit WA 99040                 2711 E. Boone Street
 Plummer, ID 83851                                                           Spokane WA 99202

  Dr. Allyson Brooks, SHPO                Teresa L. Brum, Director           Michael D. Stone, Director
  Office of Archeology & Historic Pres.   Historic Preservation Office       Spokane Parks / Recreation Dept.
  P.O. Box 48343                          (City - County)                    808 West Spokane Falls Blvd.
  Olympia, WA 98504-8343                  808 West Spokane Falls Boulevard   Seventh Floor City Hall
                                          Spokane WA 99201                   Spokane, WA 99201-3317


 Flora Goldstein, Regional Director       Tom Fitzsimmons, Director          Richard Koch
 Washington Dept. of Ecology              Washington Dept. of Ecology        Washington Dept. of Ecology
 4601 N. Monroe, Suite 202                PO Box 47600                       4601 N. Monroe, Suite 202
 Spokane, WA 99205                        Olympia, WA 98504-7600             Spokane, WA 99205



Page 6-2                                                                                    December 2002
                                                        Spokane County WWTP Final Supplemental EIS


                                     Tim Pelton                        David Swink
 Brian Howard                        City of Spokane                   Spokane Regional Health District
 Washington Dept. of Ecology Attn:   Spokane River Phosphorus          1101 W. College Avenue
 PO Box 47600                        Technical Advisory Committee      Spokane, WA 99201
 Olympia, WA 98504-7600              4401 W. Aubrey L. White Parkway
                                     Spokane, WA 99205-3939

 Tom Hargreaves, Planning Comm.      Lindell Haggin, Planning Comm.    Bev Keating, Planning Comm.
 Public Works Building, PWK-1        Public Works Building, PWK-1      Public Works Building, PWK-1
 Spokane County                      Spokane County                    Spokane County
 1026 W. Broadway Avenue             1026 W. Broadway Avenue           1026 W. Broadway Avenue
 Spokane, Wa 99260                   Spokane, WA 99260                 Spokane, Wa 99260

 Lewis Rumpler, Planning Comm.        Doug Kelley, Planning Comm.      Bill Moore, Planning Comm.
 Public Works Building, PWK-1         Public Works Building, PWK-1     Public Works Building, PWK-1
 Spokane County                       Spokane County                   Spokane County
 1026 W. Broadway Avenue              1026 W. Broadway Avenue          1026 W. Broadway Avenue
 Spokane, Wa 99260                   Spokane, Wa 99260                 Spokane, Wa 99260

 Linda Perry, Staff Assistant (3)
 Planning Commission
 Spokane County
 1026 W. Broadway Avenue
 Spokane, Wa 99260




December 2002                                                                               Page 6-3
Spokane County WWTP Final Supplemental EIS




 Please send a NOTICE OF
 AVAILABILITY to the following
 individuals:



 Chris Regan, Environmental Specialist   Spokane Transit Authority       City of Spokane
 WA State Parks & Recreation Comm.       1230 W. Boone Avenue            Park Operations Dept.
 Environmental Program                   Spokane WA 99260                810 N. Stone Street
 7150 Clearwater Lane                                                    Spokane WA 99203
 Olympia WA 98504


 Spokane Valley Fire Dept.               City of Spokane Fire Dept.      West Valley School Dist. No. 363
 10319 E. Sprague                        44 W. Riverside                 District Administration Office
 Spokane WA 99206                        Spokane WA 99201                2805 N. Argonne
                                                                         Spokane WA 99212



 Jerry Lenzi, Regional Administrator     Steve Peterson, Mayor           Avista Utilities (Electric & Gas
 Washington Dept. of Transportation      City of Liberty Lake            Services)
 Eastern Region                          P.O. Box 370                    1411 E. Mission
 2714 N. Mayfair Street                  Liberty Lake WA 99019           Spokane WA 99202
 Spokane WA 99207

 Spokane Journal of Business             Spokane Valley
                                                                         EDC - Economic Development
 112 E. 1st Avenue                       Chamber of Commerce
                                                                         Council
 Spokane WA 99202                        8817 E. Mission Avenue
                                                                         801 W. Riverside Avenue
                                         Spokane WA 99212
                                                                         Spokane WA 99201


 Inland Power & Light Company            Doug Chase                      Jeff Howard
 320 East 2nd                            Spokane County                  Earth Tech
 Spokane WA 99202                        Parks and Recreation            10800 NE 8th Street, 7th Floor
                                         404 N. Havana                   Bellevue WA 98004
                                         Spokane WA 99202

 Kim Beal/Brad Biegen                                                    Eva Combs, City Clerk
 City of Spokane Water & Hydro           Susan Winchell, AICP/Director
                                                                         Town of Millwood
 E. 914 N. Foothills Drive               Spokane County
                                                                         9103 E. Frederick
 Spokane WA 99202                        Boundary Review Board
                                                                         Spokane, WA 99206
                                         1026 W. Broadway, 2nd Floor
                                         Spokane, WA 99266-0040

                                         Duane C. Studer
                                                                         Larry Esvelt
 Kimball Engineering                     CTE Engineers
                                                                         Esvelt Environmental Engineering
 579 W. Hayden Avenue                    140 South Arthur, Suite 500
                                                                         7605 E. Hodin
 Hayden Lake, ID 83835-9726              Spokane WA 99202
                                                                         Spokane WA 99212




Page 6-4                                                                                December 2002
                                Spokane County WWTP Final Supplemental EIS




            APPENDIX A – AGENCY CORRESPONDENCE




December 2002                                                  Appendix A
                                     Spokane County WWTP Final Supplemental EIS




                APPENDIX B – SERP TRIBAL AND AGENCY
                          DOCUMENTATION




December 2002                                                       Appendix B
                                                                                                         Spokane County WWTP Final Supplemental EIS


                                                      SERP Tribal and Agency Documentation

                        Agency                                   Dates Contacted              Phone-Call Record            DSEIS Comments
                                                                                                                              Submitted
District Corps of Engineers                              10/8/02, sent DSEIS              Confirmed receipt of DSEIS      Yes
Tim Erkel, (509) 238-4570                                10/21/02, follow-up phone call   and end of comment period.
                                                                                          Sent comment letter 10/17/02.
Washington State Dept. of Fish and Wildlife              10/8/02, sent DSEIS              Confirmed receipt of DSEIS      No
Jeff Lawlor, (509) 467-4085                              10/21/02, follow-up phone call   and end of comment period.
Washington State Dept. of Fish and Wildlife              10/8/02, sent DSEIS              Confirmed receipt of DSEIS      No
Karin Divens, (509) 255-6103                             10/28/02, follow-up phone call   and end of comment period.
                                                                                          May comment.
EPA, Water Division                                      10/8/02, sent DSEIS              Confirmed receipt of DSEIS      No
Ben Cope, (206) 553-1442                                 10/21/02, follow-up phone call   and end of comment period.
                                                                                          Does not intend to comment.
Natural Resources Conservation Service                   10/8/02, sent DSEIS              Confirmed receipt of DSEIS      No
Chris Miller, (509) 924-7350                             10/21/02, follow-up phone call   and end of comment period.
                                                                                          May comment.
US Fish and Wildlife Service                             10/8/02, sent DSEIS              Confirmed receipt of DSEIS      No
Toni Davidson, (509) 893-8006                            10/21/02, follow-up phone call   and end of comment period.
                                                                                          Does not intend to comment.
Ecology, Environmental Review Section                    10/8/02, sent DSEIS              Confirmed receipt of DSEIS      Refer to Ecology,
*Forwarded document to Eastern Region Office, Heidi      10/21/02, follow-up phone call   and end of comment period.      Eastern Region Office,
Scheibner                                                                                                                 Heidi Scheibner entry.
Ecology, Eastern Region Office                           10/8/02, sent DSEIS              Confirmed receipt of DSEIS      Yes
Heidi Scheibner, (509) 456-6367                          10/21/02, follow-up phone call   and end of comment period.
                                                                                          May comment via letter
                                                                                          incorporating comments from
                                                                                          several reviewers.
State Historic Preservation Office                       10/8/02, sent DSEIS              Confirmed receipt of DSEIS      Yes
Dr. Allyson Brooks, (360) 586-3066                       10/21/02, follow-up phone call   and end of comment period
                                                                                          via message.
Colville Business Council (Colville Tribe)               10/8/02, sent DSEIS              Confirmed receipt of DSEIS      No
Joseph Pakootas, (509) 634-4711                          10/21/02, follow-up phone call   and end of comment period.
                                                                                          May comment.


December 2002                                                                                                                               Page B-1
Spokane County WWTP Final Supplemental EIS


                       Agency                        Dates Contacted              Phone-Call Record            DSEIS Comments
                                                                                                                  Submitted
Yakama Tribal Council                        10/8/02, sent DSEIS              Confirmed receipt of DSEIS      No
Spoke with Susan, Office Administrator       10/21/02, follow-up phone call   and end of comment period.
(509) 865-5121
Spokane Tribe of Indians                     10/8/02, sent DSEIS              Several unsuccessful attempts   No
Jim Seyler, (509) 258-4581                   10/21/02, follow-up phone call   were made to reach the
Brian Crossley, (509) 258-7412                                                appropriate person.
Coeur d'Alene Tribe                          10/8/02, sent DSEIS              Confirmed receipt of DSEIS      No
Alfred Nomee, (208) 686-1009                 10/21/02, follow-up phone call   and end of comment period.
                                                                              May comment.
SCAPCA                                       10/8/02, sent DSEIS              Confirmed receipt of DSEIS      Yes
Eric Skelton, (509) 477-4727                 10/21/02, follow-up phone call   and end of comment period.
                                                                              May comment.
Ecology, Spokane Regional Office             10/8/02, sent DSEIS              Confirmed receipt of DSEIS      n/a (refer to H.
Flora Goldstein, (509) 456-6149              10/21/02, follow-up phone call   and end of comment period.      Scheibner entry)
                                                                              May comment via letter
                                                                              incorporating comments from
                                                                              several reviewers.
Ecology, Water Quality                       10/8/02, sent DSEIS              Confirmed receipt of DSEIS      No
Ken Merrill, (509) 456-6148                  10/21/92, follow-up phone call   and end of comment period.
Ecology                                      10/8/02, sent DSEIS              Confirmed receipt of DSEIS      Yes (refer to H.
Richard Koch, (509) 456-6162                 10/21/02, follow-up phone call   and end of comment period.      Scheibner entry)
                                                                              May comment.
Ecology, Water Quality, Olympia              10/8/02, sent DSEIS              Confirmed receipt of DSEIS      No
Brian Howard, (360) 407-6510                 10/21/02, follow-up phone call   and end of comment period.
                                                                              Will not comment.




Page B-2                                                                                                                  December 2002
                                               Spokane County WWTP Final Supplemental EIS




            Sample of State Environmental Review Process (SERP) Letter
                        Sent to Agencies with the Draft SEIS




December 2002                                                                   Page B-3
Spokane County WWTP Final Supplemental EIS




October 8, 2002


Tom Fitzsimmons. Director
Department of Ecology
P.O. Box 47600
Olympia, WA 98504-7600

RE: Proposed Spokane County Regional Wastewater Treatment Plant

Dear Mr. Fitzsimmons,

Enclosed is a copy of the Spokane County Regional Wastewater Treatment Plant Draft
Supplemental Environmental Impact Statement (EIS). Spokane County will be seeking
assistance from the State Revolving Fund (SRF) which requires compliance with requirements
under the 1998 State Environmental Review Process (SERP). For this project, an EIS has been
prepared describing the proposed project, project alternatives, existing conditions, potential
impacts, and mitigation measures.

We are especially interested in receiving your comments on this proposed project. According to
the SERP requirements (WAC 173-98-100), Ecology must concur in writing on the findings of
the Final EIS. Your agency’s input at this Draft EIS phase is invaluable so that we can make any
necessary adjustments prior to release of the Final EIS. The official comment period for this EIS
ends November 7, 2002. We anticipate that the Final EIS will be released in early December.

Thank you for your attention to our proposed project, which we believe will greatly improve
water quality in the Spokane region. We look forward to receiving your written responses.

Sincerely,




Bruce Rawls, Director
Spokane County Public Works
Utilities Division


Cc:    Brian Howard- Olympia
       Flora Goldstein – Spokane Regional Office
       Cal Ferguson – Spokane Regional Office
       Richard Koch – Spokane Regional Office
       Ken Merrill – Spokane Regional Office




Page B-4                                                                           December 2002

				
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