SECTION 1 EXECUTIVE SUMMARY

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					                                                                            Mountain Park Specific Plan Amendment
                                                                                                  Draft EIR No. 331

                                                            SECTION 1
                                                        EXECUTIVE SUMMARY

1.1         INTRODUCTION

This Draft Environmental Impact Report (EIR) addresses the environmental effects associated
with the implementation of the proposed Mountain Park Specific Plan Amendment project. The
California Environmental Quality Act (CEQA) requires that local government agencies, prior to
taking action on projects over which they have discretionary approval authority, consider the
environmental consequences of such projects. An EIR is a public document designed to
provide the public and local and State governmental agency decision-makers with an analysis of
potential environmental consequences to support informed decision-making.

This Draft EIR has been prepared as a Program EIR, pursuant to the requirements of CEQA,
the State CEQA Guidelines, and the City of Anaheim’s CEQA procedures (refer to discussion
provided in Section 2, Introduction). The City of Anaheim is the Lead Agency, and City staff has
reviewed and revised as necessary all submitted drafts, technical studies, and reports to reflect
its own independent judgment, including reliance on applicable City technical personnel from
other departments and review of all technical subconsultant reports.

The current Mountain Park Specific Plan (SP 90-4) was adopted by the City of Anaheim in
1991. In May 2004, the City of Anaheim approved a General Plan Update (GPA No. 2004-
00419) which, among other actions, amended the land uses in the Mountain Park Specific Plan
area to decrease the intensity of development from 7,966 residential units to 2,500 units;
eliminated proposed commercial and mineral extraction uses, four school sites, a City
maintenance yard; and reduced the number of park sites. Along with the General Plan Update,
the City of Anaheim also approved an update to Title 18 (Zoning) of the Anaheim Municipal
Code, and termination of Development Agreement No. 91-01 between the City of Anaheim and
The Irvine Company relating to the Mountain Park Specific Plan. The actions related to the
Mountain Park Specific Plan area were coordinated with the project applicant. The new zoning
and general plan designations are described in more detail in Section 3, Project Description.

The primary actions associated with the project include a proposed amendment to the Mountain
Park Specific Plan (SP 90-4) to implement the adopted General Plan, and proposed
amendment to the City of Anaheim Zoning Code to incorporate the revised Zoning and
Development Standards for the project site. The property owner/developer is also requesting
that the General Plan, Safety Element, Exhibit S-5 (Fire Protection Areas) be amended to
remove the Very High Fire Hazard Severity Zone designation from proposed development areas
(including the outermost portions of the fuel modification zones and tract boundaries). This
action is supported by the Fire Master Plan included as part of the project (Appendix R). These
primary actions and other related actions are further described in Section 3.8, Intended Use of
the EIR. In addition to analysis of these actions, the Draft EIR discusses alternatives to the
proposed project and includes a mitigation program that will offset, minimize, or otherwise avoid
significant environmental impacts. Following is a summary description of the project, project
alternatives, and potential significant impacts identified through the analysis presented in this
Draft EIR.

1.2         PROJECT SUMMARY

The proposed Mountain Park Specific Plan Amendment project is located in Gypsum Canyon,
south of the Riverside (SR-91) Freeway, in the City of Anaheim and its sphere–of-influence,
Orange County, California. The Eastern Transportation Corridor (SR-241) bisects the project

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site into eastern and western segments. The majority of the project site is in the jurisdiction of
the City of Anaheim; however, the southern- and eastern-most portions are in an unincorporated
area of the County of Orange in the City of Anaheim’s sphere-of-influence. Access to the
proposed project would be provided from SR-91, Santa Ana Canyon Road and Gypsum Canyon
Road to the north, and SR-241 and Weir Canyon Road to the west. Access from SR-241 would
be provided from a proposed interchange at Weir Canyon Road. The interchange would be
implemented as part of the project (as described in Section 3.3.5) consistent with an
interchange reimbursement agreement executed between the project applicant and the
Foothill/Eastern Transportation Corridor Agencies (F/ETCA). This EIR addresses construction
of, and modifications to the proposed design for the interchange that was addressed in the Final
EIS prepared for SR-241.

The Mountain Park Specific Plan No. 90-4 area, hereinafter referred to as the “project site,”
encompasses approximately 3,001 acres and is proposed to include Development Areas and
preserved open space. The project site acreage does not include the approximate 172-acre
SR-241 right-of-way. The Mountain Park “study area” is approximately 3,023.8 acres and
includes the project site, as well as approximately 22.8 acres for off-site project features
(discussed in Section 3.3.4).

The project site is currently undeveloped with the exception of the approximate 300-acre sand
and gravel quarry site in the northeastern portion of the project site. Robertson’s Ready Mix
operated a sand and gravel mining and concrete production facility operated at the quarry under
an extraction license agreement with The Irvine Company that terminated in December 2004.
All American Asphalt operated an asphalt batch plant at the quarry site as a sublicensee to
Robertson’s. A previously approved Reclamation Plan for the quarry operation requires that the
site be vacated no more than six months (June 2005) after termination of the extraction license
agreement; however, the extraction license agreement requires that the site be vacated by April
2005, following implementation of a Reclamation Plan previously approved by the County of
Orange.

Implementation of the Mountain Park Specific Plan Amendment would allow for the
development of a maximum of 2,500 residential units in Development Areas 1, 2, 4, and 5 east
of SR-241 and Development Areas 3 and 7 west of SR-241. In addition to residential uses, the
proposed project includes the following: a City fire station, trail staging area, interpretive center,
and/or potential store concession northwest of the Santa Ana Canyon Road/Gypsum Canyon
Road intersection in Development Area 6; a school site and adjacent public community park in
Development Area 3; public and private recreation facilities; public and private trails; and
roadways and utilities necessary to serve the proposed development. Manned gates are
proposed as part of the project and would be located along Gypsum Canyon Road and the
proposed Mountain Park Drive. Access to Development Area 7, and the school and park site,
west of SR-241, would be located before the gated entry, allowing public access to these uses.

The proposed project also includes construction of the SR-241/Weir Canyon Road interchange
and Mountain Park Drive bridge overcrossing (discussed in Section 3.3.5 of this EIR). The
interchange is proposed to have a “trumpet” configuration modified to provide only a
southbound SR-241 direct entrance ramp and a northbound SR-241 flyover exit ramp. The
bridge overcrossing accommodates a proposed private roadway (Mountain Park Drive)
extending between Development Areas east and west of SR-241.

The proposed project would require the implementation of off-site project features (located on
property not owned by the project applicant) as described in Sections 3.3.4, Off-site Project



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Features, and 3.3.5, Caltrans-related Project Features.1 Off-site improvements generally
include: drainage improvements within Featherly Regional Park; realignment and improvements
to Gypsum Canyon Road between Santa Ana Canyon Road and Featherly Regional Park;
improvements to Santa Ana Canyon Road immediately west of Gypsum Canyon Road (a small
portion of this improvement also occur within Caltrans right-of-way for SR-241); SR-91/Gypsum
Canyon Road box culvert improvement (approximately 300 feet of the box culvert improvement
also occurs within Caltrans right-of-way); roadway improvements at the eastern terminus of
Weir Canyon Road at the western project boundary; roadway improvements to the current
terminus of Oak Canyon Drive east of Running Springs Drive; connection to the Santa Ana
River Interceptor (SARI) sanitary sewer line; and connections and upgrades to other off-site
infrastructure facilities. There are numerous options for the off-site sanitary sewer facility
connections for Development Areas east and west of SR-241. City staff’s preferred options for
these connections are described in Section 3, Project Description, and analyzed in Section 4.
The remaining options are described and analyzed in Section 5, Alternatives.

In addition to the SR-241/Weir Canyon Road interchange, Mountain Park Drive bridge
overcrossing and off-site improvements identified above with minor encroachments in Caltrans
right-of-way, the following project features are also located within Caltrans right-of-way:
SR-91/Gypsum Canyon Road interchange improvements; slope modifications north of
Development Area 5 along SR-91; and slope and drainage facility modifications along SR-241
north of the proposed SR-241/Weir Canyon Road interchange.

Approximately 2,163 acres of the Mountain Park project site would be preserved as open space
outside of the Development Areas, including Natural Communities Conservation Program
(NCCP) open space areas, open space designated by conservation easements, and other open
space. Open space areas are primarily located in the southern portion of the project site.

1.3         SUMMARY OF PROJECT IMPACTS

Table 1-1 at the end of this EIR section provides a summary of the potential environmental
effects of the project, the recommended mitigation measures, and identifies any unavoidable
adverse impacts (as described in Section 4 of this EIR). The reader is referred to the full text of
this EIR for a description of the environmental effects of the proposed project and
recommended mitigation measures.

As shown in Table 1-1, the proposed Mountain Park Specific Plan Amendment project would
result in potentially significant impacts for the following topical issues: geology and soils,
biological resources, traffic and circulation, air quality, noise, and cultural resources. The
project would also result in cumulative air quality impacts. Implementation of the mitigation
programs provided in Section 4 would reduce these impacts; however, the following impacts
would remain significant after implementation of the mitigation program and would require
adoption of a Statement of Overriding Considerations:

Impact 4.2-1 Development Areas 1, 2, 3, 4, and 7 would require alterations to existing scenic
             resources including landform/topography and rock outcroppings. Impacts to
             scenic resources within Development Areas 3, 4, and 7 would be visible from
             SR-91 and SR-241 and would be considered a significant and unavoidable
             impact.



1
 Caltrans-related Project Features include project features that occur primarily within Caltrans right-of-
way, and will require an encroachment permit from Caltrans.

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Impact 4.8-1 Project-related grading activities would result in a significant short-term
             construction-related air quality impact for the following air pollutants: CO, ROG,
             NOX, and PM10.

Impact 4.8-2 Project-related regional air emissions would exceed established thresholds for
             the following air pollutants and is considered a significant regional air quality
             impact: CO, ROG, and NOX.

Impact 4.8-3 The proposed project contributes to a net increase in CO, NOX, PM10, and ROG.
             Therefore, the proposed project would have a significant cumulative air quality
             impact.

Impact 4.8-4 Construction of the proposed project would expose sensitive receptors to
             pollutant concentrations that exceed SCAQMD thresholds.

The following traffic impacts associated with Weir Canyon Road and La Palma Avenue are also
considered significant and unavoidable since the improvements required to mitigate these
impacts are dependent on approval and financing from the City of Yorba Linda. Although the
project’s impact is mitigated by payment of fair-share costs for improvements by the property
owner/developer, the City of Anaheim cannot require another jurisdiction to implement these
improvements.

Impact 4.7-1 The Weir Canyon Road/La Palma Avenue intersection in the City of Yorba Linda
             would operate at LOS E during the AM peak hour under the Year 2025
             Committed Circulation System “no project” and “with project” scenarios as well as
             the Year 2025 MPAH Buildout “with project” scenario. The project’s contribution
             to the ICU value at this intersection under these scenarios is estimated to be .01
             which would be a significant impact.

Impact 4.7-2             Based on the project’s significant impact at the Weir Canyon Road/La Palma
                         Avenue intersection, the project is also assumed to significantly impact Weir
                         Canyon Road south of the intersection (between SR-91 and La Palma Avenue)
                         within the City of Yorba Linda under the same scenarios.

1.4         PROJECT ALTERNATIVES

In accordance with Section 15126.6 of the CEQA Guidelines, Section 5 of this EIR includes an
analysis of a reasonable range of alternatives that could feasibly attain the basic objectives of
the project, and evaluates the comparative merits of the alternatives. The following presents a
summary of each alternative analyzed in the EIR. Please refer to Section 5 of this EIR for a
complete discussion of the alternatives and the relative impacts with each alternative. As
required by CEQA, Section 5 also identifies the environmentally superior alternative.

1.4.1       LAND USE PLAN ALTERNATIVES

No Project/No Action Alternative

Under this alternative, the proposed Mountain Park Specific Plan project would not occur, and
the following assumptions are made for purposes of analysis. The existing quarry site would be
reclaimed under the previously approved Reclamation Plan (refer to Section 3.0, Project
Description for additional description). The extraction license agreement for the quarry
terminated in December 2004 and facilities and equipment should be removed by June 2005.
The quarry site would remain in its reclaimed condition under this alternative. The dedicated

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open space areas on-site associated with the NCCP/HCP Reserve and The Nature
Conservancy Anaheim Conservation Easement (TNC ACE) would continue to be protected.
The remainder of the project site would remain as private open space, no residential
development, landscaping, infrastructure, public or private recreational facilities, trails, etc.
would be implemented. Access into the site would remain restricted.

No Project/Development Pursuant to the Current Mountain Park Specific Plan Alternative

This alternative assumes development of the current Mountain Park Specific Plan (SP 90-4)
which was approved in 1991. SP 90-4 allowed for the development of 7,966 residential units,
commercial uses, interim sand and gravel mineral extraction, schools, parks, and open space
on 3,179 acres. Site access would be provided by the proposed Weir Canyon Road and Oak
Canyon Drive. Access would also be provided from Santa Ana Canyon Road/Gypsum Canyon
Road. As described in Section 3, Project Description, there have been a number of actions
since approval of SP 90-4 that would make implementation of this alternative difficult, including:
dedication of the TNC ACE, approval of the City of Anaheim General Plan and Zoning Code
Update in May 2004, and termination of the Development Agreement associated with SP 90-4.

Modified Land Use Plan Alternative

This alternative assumes the development of a modified land use plan. It would involve the
following uses: 2,500 residential units within seven development areas; a school site and public
community park in Development Area 5; a fire station, trail staging area, store concession/
interpretive center in Development Area 6; trails; and, public and private recreational facilities.
Under this alternative there would be no roadways extended between development areas west
and east of SR-241. The community would not be gated. This alternative would have a single
access point at Gypsum Canyon Road and Santa Ana Canyon Road to serve the development
east of SR-241. Proposed development west of SR-241 would obtain access from existing Weir
Canyon Road. The SR-241/Weir Canyon Road interchange and Mountain Park Drive bridge
overcrossing would not be constructed under this alternative. To accommodate emergency
egress, the existing unimproved dirt road that extends along Gypsum Canyon Creek would
require improvements. Approximately 1,800 feet of the existing Southern Trails Pipeline that
traverses the project site would be replaced with approximately 1,935 feet of new pipeline. The
dedicated open space areas on-site associated with the NCCP/HCP Reserve and TNC
Anaheim Conservation Easement would continue to be protected, as with the proposed project.

Reduced Development Area

This alternative assumes the development of 2,500 residential units in Development Areas east
of the SR-241 (1, 2, 4, and 5). Under this alternative, there would be no development west of
SR-241. The proposed school site and community park would be located in Development
Area 5. A fire station, trail staging area, and store concession/interpretive center would be
provided in Development Area 6. Additionally, this alternative would include trails, and public
and private recreational facilities. Approximately 2,291 acres of open space would be
preserved. The SR-241/Weir Canyon Road interchange and Mountain Park Drive bridge
overcrossing would not be constructed and the community would not be gated. As with the
Land Use Plan Alternative, this alternative would have a single access point at Gypsum Canyon
Road and Santa Ana Canyon Road and to accommodate emergency egress, the existing
unimproved dirt road that extends along Gypsum Canyon Creek would require improvements.
The dedicated open space areas on-site associated with the NCCP/HCP Reserve and TNC
ACE would continue to be protected, as with the proposed project.



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Reduced Development Area/Reduced Density Alternative

This alternative assumes the development of 1,146 residential units in Development Areas east
of the SR-241 (1, 2, 4, and 5). Under this alternative, there would be no development west of
SR-241. With the exception of the decreased number of residential units, this alternative would
have the same proposed uses as the Reduced Development Area Alternative described above.

Highly Concentrated Development Area Alternative

The purpose of the Highly Concentrated Development Area Alternative is to reduce or eliminate
unavoidable landform alteration impacts that are associated with implementation of the
proposed project. To accomplish this, development under this alternative scenario would be
limited to Development Areas 5 and 6 that have been disturbed by previous activities and do not
have significant natural landform/topographic features remaining. This alternative assumes the
development of 2,500 residential units, a school site, and community park on Development
Area 5 (quarry site). As with the proposed project, a fire station, trail staging area, and store
concession/interpretive center would be provided in Development Area 6. Approximately 2,830
acres of open space would be preserved and the dedicated open space areas on-site
associated with the NCCP/HCP Reserve and TNC ACE would continue to be protected. The
SR-241/Weir Canyon Road Interchange and SR-241 bridge overcrossing would not be
constructed and the community would not be gated. As with the Modified Land Use Plan
Alternative, this alternative would have a single access point at Gypsum Canyon Road and
Santa Ana Canyon Road and to accommodate emergency egress, the existing unimproved dirt
road that extends along Gypsum Canyon Creek would require improvements. Additionally, this
alternative would include implementation of a regional riding and hiking trail along Gypsum
Canyon Creek adjacent to Development Area 5.

1.4.2       INFRASTRUCTURE DESIGN ALTERNATIVES

SR-241/Weir Canyon Road Interchange Alternative

The proposed project involves implementation of the SR-241/Weir Canyon Road Interchange
with a Type L-11 ”trumpet” configuration. This design alternative assumes a half-diamond
interchange with a two-lane overcrossing. A southbound SR-241 direct entrance ramp and
northbound SR-241 off-ramp would be provided. As with the interchange proposed with the
project, this interchange would be constructed by the property owner/developer as part of the
project; however, the interchange would be owned and maintained by Caltrans.

Off-site Sanitary Sewer Connection Alternatives

As noted previously, there are a number of available options for connecting the on-site sanitary
sewer system to the SARI line (located north of the project site within the Santa Ana River).
These options are discussed in detail in the Project Sewer Study prepared for the project
(discussed in Section 4.12, Public Services and Utilities). The numbering of Alternatives
presented in this EIR is consistent with the Project Sewer Study; however, the east basin (east
of SR-241) options are noted with “E” (e.g., Alternative E-1) and west basin options are noted
with “W”. As part of the proposed project, the City of Anaheim staff have identified preferred
connection options for the east and west basins. The preferred sanitary sewer line connection
options included as part of the project are described in Section 3, Project Description, and
include: Alternative E-2, Gravity Main to SARI Pipeline in SAVI Ranch via Santa Ana Canyon
Road; and Alternative W-3, Gravity Main to The Summit of Anaheim Hills via Weir Canyon
Road. It should also be noted that Alternative W-1, Gravity Main to East Basin Facilities via
Bridge over SR-241, involves directing flows from the west basin to the east basin using

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sanitary sewer lines in Mountain Park Drive and the bridge overcrossing. Under this option
there would not be a long-term connection to existing facilities west of the project site. Following
is a summary of the alternative sanitary sewer connection options addressed in Section 5,
Alternatives.

East Basin Off-site Sanitary Sewer Connection Alternatives

Sanitary sewer wastewater generated by proposed development in the eastern portion of the
project site would drain by gravity flow northerly to the intersection of Gypsum Canyon Road
and Santa Ana Canyon Road. The proposed project includes one option to convey sanitary
sewer wastewater out of the development to a SARI connection point (Alternative E-2 − Gravity
Main to SARI Pipeline in SAVI Ranch via Santa Ana Canyon Road). In addition to this option
addressed as part of the project (Alternative E-2 in the Mountain Park Project Sewer Study),
there are four additional options for the SARI line connection that are described in Section 5,
Alternatives.

       •     Alternative E-1 – Gravity Main to SARI Pipeline via Gypsum Canyon Road

       •     Alternative E-3 – Gravity Main to SAVI Ranch via Santa Ana Canyon Road and River
             Maintenance Road

       •     Alternative E-4 – Gravity Main to SARI Pipeline South Relocation

       •     Alternative E-5 – Force Main to SARI Pipeline via Gypsum Canyon Road Bridge

West Basin Off-site Sanitary Sewer Connection Alternatives

Sanitary sewer wastewater generated by proposed development in the western portion of the
project site would ultimately drain by gravity north and east in Mountain Park Drive, across
SR-241 (within bridge), and would join with east basin sanitary sewer facilities (Alternative 1 in
the Mountain Park Project Sewer Study). However, based on current phasing sequences
planned for the project, the west basin Development Areas would be developed prior to the east
basin Development Areas, and east basin sanitary sewer infrastructure would not be in place
and available to receive west basin sewer flows. A gravity main option to the Summit of
Anaheim Hills via Weir Canyon Road is addressed as part of the project (Alternative W-3 in the
Mountain Park Project Sewer Study). Alternative off-site sewer connection options for the west
basin are evaluated in Section 5 and include:

       •     Alternative W-2 – Temporary Force Main to The Summit Residential Community via
             Weir Canyon Road

       •     Alternative W-4 – Gravity Main to the Summit of Anaheim Hills via Fallbrook Way

1.4.3       ALTERNATIVES ELIMINATED FROM DETAILED CONSIDERATION

The following alternatives were evaluated but were eliminated from detailed consideration
because they were found to be infeasible or failed to eliminate or reduce significant impacts
associated with the proposed project. These alternatives are discussed further in Section 5.2.

      •     Alternative Site

      •     Residential Development with Commercial Use


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      •     Proposed Project with Alternative Circulation Concepts

                  -     Ungated Community

                  -     Extension of Oak Canyon Drive into the Project Site/No Mountain Park Road

                  -     Extension of Weir Canyon Road East to Development Area 1

1.5         AREAS OF CONTROVERSY AND ISSUES TO BE RESOLVED

Section 15123 of the State CEQA Guidelines indicates that an EIR summary should identify
areas of controversy known to the lead agency including issues raised by agencies and the
public. The following issues pertaining to the proposed project were raised during the scoping
process.

      •     The need for construction of school(s) to serve the project. Because the schools in
            surrounding areas are currently operating at or beyond capacity, a number of individuals
            indicated that a school within the Mountain Park site should be provided prior to
            occupancy of any residential units. The proposed project involves the provision of a
            potential school site; however, the Orange Unified School District (OUSD) would be
            responsible for the purchase of the school site and ultimate construction of a school.
            The potential project impacts to schools are discussed in Section 4.12, Public Services
            and Utilities. Additionally, this EIR addresses the potential impacts of a school within the
            project site (including physical impacts associated with construction, traffic, etc.). Under
            State law, the property owner/developer would be required to pay required developer
            fees or choose to enter into a facilities and funding mitigation agreement with the OUSD.
            The OUSD and the property owner (Irvine Community Development Company) have
            entered into a School Impact Mitigation Agreement for the proposed Mountain Park
            project. The agreement was approved by the OUSD in December 2004, and outlines
            the School Facilities Plan for the Mountain Park project. The mitigation agreement is
            provided in Appendix K to this EIR. Further discussion is provided in Section 4.12,
            Public Services and Utilities.

            It should be noted that the property owner/developer and the City of Anaheim do not
            have jurisdiction over the determination of when/if a school will be developed, the type of
            school, or the size of the school. Those decisions are under the purview of the OUSD.

      •     Traffic and circulation-related issues associated with the proposed project. The
            proposed Mountain Park Specific Plan includes a circulation system that is described in
            Section 3.3, Project Description. The main access points to the project site are Weir
            Canyon Road and Gypsum Canyon Road/Santa Ana Canyon Road, and the community
            is proposed to be gated. Following are some of the traffic/circulation-related comments
            were made during the scoping process: the project should not be gated allowing public
            access through the site; Oak Canyon Road should be extended into the project site
            instead of constructing the proposed Mountain Park Road; Weir Canyon Road should be
            extended east from SR-241 to Development Area 1; the project would worsen traffic
            conditions in the adjacent communities and on SR-91. In response to these comments,
            alternative circulation design options are addressed in Section 5, Alternatives. Section
            4.7, Traffic and Circulation, addresses the potential traffic impacts on the local and
            regional circulation network.




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      •     The project should include a commercial component to support its residents. There is a
            concern that the existing shopping centers in neighborhoods proximate to the project site
            do not have the capacity for additional patrons and the traffic generated by project
            residents using these commercial areas would worsen traffic conditions internal to the
            shopping centers as well as on local streets. Traffic conditions on the local circulation
            network are addressed in Section 4.7, Traffic and Circulation and a project alternative
            that includes a commercial component in the Mountain Park area is discussed in
            Section 5, Alternatives. It should be noted that the potential for the proposed project to
            capture retail sales was evaluated (Gregory Stoffel & Associates, 2004) and is on file at
            the City of Anaheim Planning Department. Said study concludes that the proposed
            Mountain Park community creates insufficient demand by itself to support an additional
            local-serving retail center and the proposed community is too remote to attract sales
            from existing residents of Anaheim and Yorba Linda. Said study further concludes that
            existing retail centers in Anaheim which are accessible to future residents of the
            proposed project are currently under-performing in relation to similar centers located
            throughout the region, and have sufficient physical and sales capacity to handle
            increased sales resulting from the project. For these reasons, an alternative that
            includes a commercial shopping center has been eliminated from further consideration.
            However, it should be noted that the proposed Mountain Park Specific Plan allows for a
            convenience market or grocery store having a maximum interior floor area of 3,000
            square feet.




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                                                                              TABLE 1-1
                                                                 SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                      AND MITIGATION PROGRAM

Table 1-1 summarizes the conclusions of the environmental impact analysis conducted for the proposed Mountain Park Specific Plan
project, the mitigation program, and the level of significance of potential project impacts after application of the mitigation program.
The first column of the table summarizes the potential environmental impacts of the project based on the analysis provided in
Section 4 of this EIR. It should be noted that when an impact is identified parenthetically (e.g., Impact 4.2-1), this indicates
that the impact was determined to be significant prior to mitigation. The impact numbering corresponds to the analysis
presented in Section 4 for each topical issue. A summary of significant impacts was previously provided in Section 1.3, Project.
Additionally, consistent with analysis presented in Section 4, the summary of potential impacts addresses on-site project features,
off-site project features, and project features within Caltrans right-of-way.

The mitigation program required for the project is outlined in the second column and includes PDFs, SCs, and MMs which are
described below. For each topic, the PDFs and SCs are identified first, as the impact conclusions presented assume their
implementation. When an impact is determined to be less than significant because of specific project design features (PDF) and/or
existing requirements and standard conditions (SC), the relevant PDF and/or SC is identified.

      •     Project Design Features (PDF) – Project Design Features are specific design elements proposed by the project applicant that
            have been incorporated into the project to prevent the occurrence of, or reduce the significance of, potential environmental
            effects. Because PDFs have been incorporated into the project, they do not constitute mitigation measures as defined by
            CEQA. However, PDFs are identified in the mitigation section for each topical issue and will be included in the mitigation
            monitoring program to be developed for, and implemented as a part of, the proposed project.

      •     Existing Requirements and Standard Conditions (SC) – Existing requirements and standard conditions are based on local,
            state, or federal regulations or laws that are frequently required independently of CEQA review and also serve to offset or
            prevent specific impacts. Typical standard conditions and requirements include compliance with the provisions of the Uniform
            Building Code, South Coast Air Quality Management District Rules, local agency fees, etc. Additional conditions may be
            imposed on the project by the City during the approval process, as appropriate.

      •     Mitigation Measures (MM) – Where a potentially significant environmental effect has been identified and is not reduced to a
            level considered less than significant through the application of PDFs and standard conditions and requirements, project-
            specific mitigation measures have been recommended.

The third column identifies the level of significance of impacts after application of the mitigation program.




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                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                          Level of Significance
         Environmental Impact Analysis                                                               Mitigation Program                     After Mitigation
SECTION 4.1 − LAND USE AND PLANNING
On-site Project Feature Impacts
The proposed project would involve the                                No mitigation is required                                        No impact
development of residential, public facilities,
recreational and infrastructure uses on the project
site which is currently undeveloped with the
exception of the existing Robertson’s Ready Mix
surface mining site and All American Asphalt. The
extraction license agreement for Robertson’s and
sublease for All American Asphalt terminated in
December 2004 and these facilities will be vacated
by June 2005. No impacts to on-site land uses
would result from implementation of the project.
The proposed project would not have direct impacts                    No mitigation is required                                        No impact
on existing uses to the north (SR-91, Featherly
Regional Park and residential uses in the City of
Yorba Linda), west (Sycamore Canyon and The
Summit of Anaheim Hills residential communities in
the City of Anaheim), and east (Chino Hills State
Park) of the project site.
The area south of the proposed Development Areas                      No mitigation is required                                        No impact
includes open space within The Nature
Conservancy Anaheim Conservation Easement
(TNC ACE), and the Natural Communities
Conservation Program (NCCP) Reserve, as well as
proposed other open space. These areas would be
preserved with the proposed project (72 percent of
the project site would remain open space) and no
impact would result.
The project would be consistent with relevant land                    No mitigation is required                                        No impact
use-related goals and policies outlined in the City of
Anaheim General Plan, County of Orange General
Plan, and Southern California Association of
Governments (SCAG) Regional Comprehensive
Plan and Guide (RCPG); no significant impacts
related to planning programs would result from the
project.




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                                                                                                                                                        Draft EIR No. 331

                                                                            TABLE 1-1 (Continued)
                                                                     SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                          AND MITIGATION PROGRAM

                                                                                                                                                  Level of Significance
          Environmental Impact Analysis                                                    Mitigation Program                                       After Mitigation
Off-site Project Feature Impacts
The proposed Santa Ana River Interceptor (SARI) No mitigation is required                                                                      No impact
line connection for the east basin sanitary sewer
facilities would traverse privately-owned property
including a commercial parking lot within SAVI
Ranch in the City of Yorba Linda. This would also
require construction within existing street right-of-
way. These temporary land use impacts would not
be significant.     Other off-site project features
(drainage and roadway improvements described in
Section 3.3.4) would not result in significant off-site
land use impacts.
The project applicant would obtain appropriate
permits and authorization from affected property
owners and jurisdictions (refer to discussion in
Section 3.8, Intended Uses of the EIR).
Caltrans-related Project Feature Impacts
The SR-241/Weir Canyon Road interchange and No mitigation is required                                                                          No impact
Mountain Park Drive bridge overcrossing are
transportation improvements associated with the
planned existing SR-241 and would not result in
significant land use impacts.
Remedial grading for Development Area 5, roadway
improvements at SR-91/Gypsum Canyon Road and
along Santa Ana Canyon Road, and drainage
facility modifications along SR-241 would encroach
into Caltrans right-of-way. An encroachment permit
would be obtained from Caltrans and no significant
land use impacts would result.
SECTION 4.2 − AESTHETICS
On-site Project Feature Impacts                    Project Design Features
The proposed project would alter the existing visual PDF 2-1              The Mountain Park Specific Plan provides for replacement of oak, Less than significant
character of the site through the introduction of                         sycamore, willow and other native trees removed as a result of the project
development in currently undeveloped areas. The                           at a ratio of 20:1. In conjunction with the submittal of each tentative tract
visual changes would not substantially degrade the                        or parcel map, the property owner/developer shall submit a Detailed
visual character or quality of the site. Conversely,                      Landscape Plan to the Planning Department demonstrating that trees
the proposed project would remove the existing                            removed from the site will be replaced at a total ratio of 20:1. The 20:1

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                                                                                                                                                                      Draft EIR No. 331

                                                                               TABLE 1-1 (Continued)
                                                                        SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                             AND MITIGATION PROGRAM

                                                                                                                                                                 Level of Significance
         Environmental Impact Analysis                                                               Mitigation Program                                            After Mitigation
active mine on-site which is seen from various                                   ratio is achieved using a combination of the Scenic Corridor Overlay tree
surrounding vantage points.                                                      list (Anaheim Zoning Code Chapter 18.18, Table 18-B), and the Mountain
                                                                                 Park Specific Plan Tree List.
                                                                     Existing Regulations and Standard Conditions
                                                                     SC 2-1      Prior to approval of grading plans, the property owner/developer shall
                                                                                 provide grading plans to the Department of Public Works demonstrating
                                                                                 that graded areas will be compatible with natural landform characteristics
                                                                                 in conformance with the Anaheim Municipal Code, Title 17-Land
                                                                                 Development and Resources, the City of Anaheim Grading Design
                                                                                 Manual and Hillside Grading Procedures, the Mountain Park Specific Plan
                                                                                 Grading Concept and Hillside Grading and Landscape Policies, and the
                                                                                 most recent version of the Anaheim Building Code (ABC).
                                                                     SC 2-2      Prior to approval of precise grading plans, the property owner/developer
                                                                                 shall prepare a detailed slope landscape plan, which shall be approved by
                                                                                 the Department of Public Works. The plan shall be certified by a licensed
                                                                                 landscape architect, and be prepared in compliance with Section 17.06 of
                                                                                 the City of Anaheim Municipal Code and the Mountain Park Specific Plan
                                                                                 Grading Concept and Hillside Grading and Landscape Policies to blend
                                                                                 landscape features with the existing environment. In addition, the
                                                                                 landscape plan shall conform to the preliminary landscape plan approved
                                                                                 in conjunction with the development area plans.
                                                                     SC 2-3      Tree replacement shall be conducted consistent with Section 18.18.040.
                                                                                 Prior to approval of grading plans, the property owner/developer shall
                                                                                 provide a Specimen Tree Removal Plan to the Planning Department
                                                                                 demonstrating that the proposed project has been designed in
                                                                                 accordance with the provisions of Chapter 18.18.040 and required tree
                                                                                 replacement.
Development Areas 1, 2, 3, 4, and 7 would require SC 2-1                                                                                                      Significant and unavoidable
alterations to existing scenic resources including
landform/topography and rock outcroppings.
Impacts to scenic resources within Development
Areas 2, 4 and 7 would be visible from SR-91 and
SR-241. (Impact 4.2-1)




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                                                                                                                                                                          Draft EIR No. 331

                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                    Level of Significance
          Environmental Impact Analysis                                        Mitigation Program                                      After Mitigation
The proposed project would introduce typical Project Design Features                                                             Less than significant
lighting for a residential community as well as
sports field lighting for the proposed community PDF 2-2  Prior to approval of the Park Master Plan for the sports park within
park in Development Area 3.                               Development Area 3, the property owner/developer shall submit lighting
                                                          plans for review and approval by the Community Services Department
                                                          that incorporate the following design specifications:
                                                                                   •   Sportsfield luminaires shall have mounting hardware approved by the
                                                                                       City, which cannot be inadvertently or intentionally adjusted to cause
                                                                                       spillover impacts. Instead, luminaries shall be professionally and
                                                                                       permanently installed to direct light only onto the sports fields/courts
                                                                                       and away from residential areas and other development.
                                                                                   •   Luminaire lamps shall provide good color rendering and natural light
                                                                                       qualities.
                                                                                   •   Luminaires shall be restricted to no more than 500 lux (1 lumen per
                                                                                       square meter) or 50 foot-candles per fixture.
                                                                                   •   Luminaires shall be placed at the appropriate, engineered height to
                                                                                       reduce potential for glare and incidental spillover into adjacent
                                                                                       properties and open space.
                                                                                   •   Luminaire mountings, poles, and fixtures shall have matted finishes.
                                                                      Existing Regulations and Standard Conditions
                                                                Prior to approval of street improvement plans for a development area; the
                                                                      SC 2-4
                                                                property owner/developer shall submit a detailed lighting plan for review
                                                                and approval by the Public Utilities Department. The plan shall be
                                                                certified by a professional engineer and be prepared to minimize light
                                                                spillover effects.
The proposed project would be consistent with No mitigation is required                                                                   No impact
relevant aesthetic and landform-related goals and
policies outlined in the City of Anaheim General
Plan, County of Orange General Plan, and SCAG
RCPG.
The proposed project would result in the removal of PDF 2-1 and SC 2-3                                                                    Less than significant
existing trees within the primary impact area
identified on Exhibit 3-20.




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                                                                                                                                                                      Draft EIR No. 331

                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                                                 Level of Significance
          Environmental Impact Analysis                                                               Mitigation Program                                           After Mitigation
Off-site Project Feature Impacts
The proposed off-site project features (described in No mitigation is required                                                                                No impact
Section 3.3.4) include improvements to existing
roadways and infrastructure.         The proposed
improvements would not alter the visual character
or setting of the area in which they are located,
would not damage scenic resources, and would not
create a new source of substantial light and glare.
Caltrans-related Project Feature Impacts             SC 2-1, SC 2-2, and                                                                                      Less than significant
The SR-241/Weir Canyon Road interchange and                           Existing Regulations and Standard Conditions
Mountain Park Drive bridge overcrossing, proposed
improvements at the SR-91/Gypsum Canyon Road                          SC 2-5      Prior to the issuance of an Encroachment Permit by Caltrans, the property
interchange and along Santa Ana Canyon Road,                                      owner/developer shall submit grading plans to Caltrans demonstrating
and drainage facility modifications along SR-241,                                 that graded areas are in conformance with Caltrans standard
would not alter the visual character along SR-91 or                               specifications.
SR-241. These facilities are visually consistent with                 SC 2-6      Prior to the issuance of an Encroachment Permit by Caltrans, the property
other similar facilities in the area. The remedial                                owner/developer shall submit landscape plans for areas within Caltrans
slope grading required in the northern portion of                                 right-of-way to Caltrans for review and approval, demonstrating that the
Development Area 5 within Caltrans right-of-way                                   proposed plant palette is in conformance with Caltrans requirements,
would be visible from various vantage points to the                               including Executive Order 13112, Invasive Species. Proof of this approval
north, including SR-91 which is an eligible state                                 shall be submitted to the City of Anaheim Department of Public Works.
scenic highway. Slope modifications along SR-241
would be visible from vantage points along SR-241.
SECTION 4.3 − GEOLOGY AND SOILS
On-site Project Feature Impacts                                       Existing Regulations and Standard Conditions                                            Less than significant
There are no known active or potentially active SC 3-1                            Prior to issuance of each building permit, the property owner/developer
faults on or crossing the project site; therefore, the                            shall demonstrate that each structure has been designed in accordance
possibility of surface fault rupture is considered                                with the most recent seismic standards in the ABC (Anaheim Building
remote. However, the project site is located in a                                 Code) and approved by the Chief Building Official. The ABC contains
seismically active region, and people and structures                              provisions that regulate the design and construction of excavations,
could be exposed to seismic ground shaking.                                       foundations, retaining walls and other building elements to control the
(Impact 4.3-1)                                                                    effects of seismic ground shaking and adverse soil conditions.




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                                                                           TABLE 1-1 (Continued)
                                                                    SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                         AND MITIGATION PROGRAM

                                                                                                                                                           Level of Significance
     Environmental Impact Analysis                                                            Mitigation Program                                             After Mitigation
                                                                 SC 3-2   Prior to issuance of building permits, the property owner/developer shall
                                                                          submit building pad certifications to the Department of Public Works, as
                                                                          required in Code Section 17.06, documenting that grading has been
                                                                          completed in conformance with the Anaheim Municipal Code, Title 17-
                                                                          Land Development and Resources, the City of Anaheim Grading Design
                                                                          Manual and Grading Plan Procedures, and the Mountain Park Specific
                                                                          Plan Grading Concept and Hillside Grading and Landscape Policies.
                                                                 SC 3-3   In compliance with the Anaheim Municipal Code, prior to approval of each
                                                                          mass grading plan, the property owner/developer shall submit a
                                                                          preliminary geotechnical report prepared by an engineering geologist and
                                                                          geotechnical engineer to the Department of Public Works for review and
                                                                          approval. This report shall be prepared to the satisfaction of the City
                                                                          Engineer and shall address soil and geology related constraints and
                                                                          hazards identified in EIR No. 331 such as slope stability, settlement,
                                                                          liquefaction, and related secondary seismic hazards. For grading within
                                                                          Caltrans right-of-way, a preliminary geotechnical report shall be submitted
                                                                          and approved by Caltrans. Specifically, the report shall:
                                                                          •   Include an assessment of potential soil related constraints such as
                                                                              stability of proposed cut, fill and natural slopes. Conduct further
                                                                              subsurface exploration to refine geologic structure for cut slope
                                                                              stability. If the report finds stabilization necessary, grading plans
                                                                              shall require corrective measures to address the need for
                                                                              stabilization;
                                                                          •   Include an assessment of on-site landslides and appropriate
                                                                              corrective measures, such as further subsurface exploration of
                                                                              landslide areas beneath planned fills and development areas.
                                                                              Corrective measures would include complete removal, if feasible or
                                                                              stabilization or buttressing of the landslide. This would involve partial
                                                                              removal of the landslide and stabilizing potential future movement
                                                                              with earthen fill or reinforced materials;
                                                                          •   Include subsurface exploration of alluvial and canyon drainage areas
                                                                              beneath planned fills or development areas;
                                                                          •   Evaluate excavation characteristics of on-site earth materials;




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                                                                        TABLE 1-1 (Continued)
                                                                 SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                      AND MITIGATION PROGRAM

                                                                                                                                                        Level of Significance
     Environmental Impact Analysis                                                         Mitigation Program                                             After Mitigation
                                                                      •   Include subsurface exploration to refine geologic structure for cut
                                                                          slope stability;
                                                                      •   Establish specific remedial grading requirements, including but not
                                                                          limited to establishing parameters for stabilization/ buttressing of
                                                                          slopes, removal of unstable soil materials;
                                                                      •   Provide grading, foundation, and structural design recommendations
                                                                          based on findings of future geotechnical investigations;
                                                                      •   Address       settlement,      liquefaction,    and   structural   design
                                                                          recommendations. Grading plans shall incorporate removal, where
                                                                          feasible, of all potentially liquefiable alluvium. The grading plans shall
                                                                          also incorporate placement of engineered fill in the canyons and
                                                                          installation of a subdrain system;
                                                                      •   Address the potential for expansive soils. Representative soil
                                                                          samples of near-surface soil material shall be collected and tested for
                                                                          expansion potential after the completion of rough grading on-site.
                                                                          Expansive soils that are detrimental to the project shall be subject to
                                                                          special building/foundation design, deepened foundations, post-
                                                                          tension foundations, soil removal, selective grading to blend highly
                                                                          expansive soils with soils of low expansivity, moisture conditioning, or
                                                                          other corrective measures as recommended by a licensed
                                                                          soils/geotechnical engineer and approved by the City Engineer prior
                                                                          to approval of each grading plan;
                                                                      •   Include an evaluation of potentially corrosive soils and recommend
                                                                          appropriate corrective measures. If corrosive soils are found,
                                                                          corrective measures shall be incorporated into the grading plans;
                                                                      •   Address collapsible/compressible material. This material shall be
                                                                          subject to removal or other corrective measures in all areas planned
                                                                          for structural fill. Topsoil, colluvium, alluvium, highly weathered
                                                                          bedrock, and landslide materials with settlement potential shall be
                                                                          subject to corrective measures such as removal and recompaction,
                                                                          surcharging, settlement monitoring, and/or other measures deemed
                                                                          appropriate by the geotechnical engineer of record and approved by
                                                                          the City Engineer prior to approval of each grading plan;




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                                                                                                                                                                         Draft EIR No. 331

                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                                                   Level of Significance
          Environmental Impact Analysis                                                              Mitigation Program                                              After Mitigation
                                                                                   •   Include appropriate laboratory testing to define soil engineering
                                                                                       parameters;
                                                                                   •   Include additional refraction lines to better ascertain rock hardness
                                                                                       and rippability for specific planned cut areas;
                                                                                   •   Include a review of seismic and faulting conditions on-site. Seismic
                                                                                       design parameters identified for the project shall be incorporated into
                                                                                       project design as applicable. Caltrans seismic design criteria for the
                                                                                       proposed overcrossings shall be incorporated into overcrossing
                                                                                       design and implementation; and,
                                                                                   •   Corrective work within Caltrans right-of-way shall be done in
                                                                                       accordance with Caltrans standard specifications.
                                                                      Mitigation Measures
                                                                 Prior to the approval of each rough grading plan, the property
                                                                      MM 3-1
                                                                 owner/developer shall submit a site specific geotechnical report prepared
                                                                 by a civil engineer based on recommendations of the preliminary
                                                                 geotechnical reports required under SC 3-3 to the Department of Public
                                                                 Works for review and approval. Site-specific geotechnical studies shall
                                                                 provide specific feasible recommendations for soils engineering,
                                                                 appropriate drains and subdrains in each Development Area, and address
                                                                 the potential for artesian conditions in Development Areas 1 and 2. As
                                                                 part of addressing the potential affects of groundwater on slope stability
                                                                 during future site specific investigations, the property owner/developer
                                                                 shall obtain and provide data from piezometers installed through the
                                                                 alluvium of Gypsum Canyon into the underlying bedrock, near proposed
                                                                 toe of slopes. The piezometers should be monitored for a period of one
                                                                 year to evaluate the potential artesian conditions with consideration for
                                                                 seasonal fluctuations in groundwater elevations.
The presence of elevated groundwater conditions SC 3-1, SC 3-2, SC 3-3, and MM 3-1                                                          Less than significant
on the project site could cause liquefaction.
(Impact 4.3-2)
 The project site is located in an area where three SC 3-1, SC 3-2, SC 3-3, MM 3-1, and                                                     Less than significant
 landslide complexes have been mapped adjacent
 to or within the project site. (Impact 4.3-3)      Mitigation Measures
                                                    MM 3-2       Prior to the approval of each grading plan, a note shall be added to the
                                                                 grading plan requiring that during grading operations, all grading and
                                                                 earthwork shall be performed under the observation of a registered
                                                                 geotechnical engineer in order to achieve proper sub-grade preparation,

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                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                       Level of Significance
          Environmental Impact Analysis                                         Mitigation Program                                       After Mitigation
                                                           selection of satisfactory materials, and placement and compaction of all
                                                           structural fill. An engineering geologist shall map cut slopes during
                                                           grading to identify any laterally continuous, adversely oriented, broken or
                                                           fractured zones that may reduce slope stability. The note shall be
                                                           prepared to the satisfaction of the Department of Public Works.
During construction, soil would be exposed and PDF 5-1, SC 5-1, SC 5-2, and SC 5-3 provided below under Section 4.5, Water Quality Less than significant
there would be an increased potential for soils
erosion compared to existing condition.       Soil
erosion during a storm event and following
completion of project development are addressed in
Section 4.5, Water Quality.
The proposed project includes cut and fill slopes.                    SC 3-1, SC 3-2, SC 3-3, MM 3-1, and MM 3-2                                                Less than significant
There is a potential for slope failure if these slopes
are not properly designed and constructed. (Impact
4.3-4)
The proposed project may include blasting in areas                    SC 3-1, SC 3-2, SC 3-3, MM 3-1, MM 3-2, and                                               Less than significant
where cuts exceed 100 feet. Blast-related impacts
                                                                      Mitigation Measures
such as rock falls, reactivation of landslides and
vibration could occur. (Impact 4.3-5)                                 MM 3-3      Prior to the commencement of any blasting activities, the property
                                                                                  owner/developer shall submit a blasting plan prepared by a qualified
                                                                                  blasting specialist to the Fire Department and Department of Public Works
                                                                                  for review and approval. A blasting permit shall be obtained from the Fire
                                                                                  Department. A copy of the approved blasting plan shall be submitted to
                                                                                  the Planning Department. The property owner/developer shall be
                                                                                  responsible for all costs associated with the preparation of the blasting
                                                                                  plan to the satisfaction of the Fire Department. The blasting plan shall be
                                                                                  prepared in accordance with the United States Department of Interior,
                                                                                  Office of Surface Mining (USOSM) standards and shall include, but not be
                                                                                  limited to the following:
                                                                                  a.   Pre-blast survey
                                                                                  b.   Site and location of planned blasting and hours of operation (blasting
                                                                                       to be conducted during the daylight hours only)




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                                                                        TABLE 1-1 (Continued)
                                                                 SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                      AND MITIGATION PROGRAM

                                                                                                                                                       Level of Significance
     Environmental Impact Analysis                                                        Mitigation Program                                             After Mitigation
                                                                      c.   Notification of blasting activities to all property owners within one-
                                                                           half mile of the blasting area, which may include (depending on
                                                                           location of blasting) private residents, Caltrans, the County of
                                                                           Orange, the City of Yorba Linda and any other persons/agencies
                                                                           determined appropriate by the Fire Department. This notification
                                                                           shall describe expected period and frequency that the blasting shall
                                                                           occur and give a contact phone number for any questions or
                                                                           complaints. All complaints shall be responded to in a method
                                                                           deemed satisfactory to the City of Anaheim Planning Director.
                                                                      d.   Types and amounts of explosives
                                                                      e.   Warning system information
                                                                      f.   Methods of transportation and handling of explosives
                                                                      g.   Minimum acceptable weather conditions
                                                                      h.   Procedures for handling, setting, wiring and firing explosives
                                                                      i.   Procedures for clearing and controlling access to blast danger
                                                                      j.   Procedures for handling misfires and other unusual occurrences
                                                                      k.   Emergency action plan
                                                                      l.   Material safety data sheet for all explosives or other hazardous
                                                                           materials expected to be used.
                                                                      m.   Compliance with local, state and federal laws
                                                                      n.   Measures to assess, control, and monitor noise and ground vibration
                                                                           from blasting, including:
                                                                           •   The project contractor shall use current state-of-the-art
                                                                               technology to keep blast-related vibration and air blast at off-site
                                                                               residential and other occupied structures as low as possible,
                                                                               consistent with blasting safety. In no instance shall blast
                                                                               vibration or air blast, measured on the ground adjacent to a
                                                                               residential or other occupied structure, be allowed to exceed the
                                                                               frequency dependent limits contained in the USOSM
                                                                               regulations.




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                                                                             TABLE 1-1 (Continued)
                                                                      SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                           AND MITIGATION PROGRAM

                                                                                                                                                            Level of Significance
          Environmental Impact Analysis                                                      Mitigation Program                                               After Mitigation
                                                                              •   The project contractor shall use a blasting seismograph to
                                                                                  monitor and record air blast and vibration for blasts within 1,000
                                                                                  feet of residences and other occupied structures to verify that
                                                                                  measured levels are within the recommended limits at those
                                                                                  locations. If blasting is found to exceed specified levels, blasting
                                                                                  shall cease, and alternative blasting or excavation methods that
                                                                                  result in the specified levels not being exceeded shall be
                                                                                  employed.
                                                                              •Air blast and vibration monitoring shall take place at the nearest
                                                                               off-site residential or other occupied structure. If vibration levels
                                                                               are expected to be lower that those required to trigger the
                                                                               seismograph at that location, or if permission cannot be
                                                                               obtained to record at that location, recording shall be
                                                                               accomplished at some closer site in line with the structure.
                                                                               Specific locations and distances where air blast and vibration
                                                                               are measured shall be documented in detail along with
                                                                               measured air blast and vibration amplitudes.
There are unsuitable soils on the project site (cut/fill SC 3-1, SC 3-2, SC 3-3, MM 3-1, and MM 3-2                                                  Less than significant
slopes, compressible/collapsible material, fill
materials, and expansive soils). (Impact 4.3-6)
There are expansive soils (as defined in Table 18- SC 3-1, SC 3-2, SC 3-3, and MM 3-1                                                                Less than significant
1-B of the Uniform Building Code (1994)) in areas
proposed for construction. (Impact 4.3-7)
The project would be consistent with relevant PDFs, SCs, and MMs above apply                                                                         No impact
geology/soils-related goals and policies outlined in
the City of Anaheim General Plan and SCAG
RCPG.
Off-site Project Feature Impacts
The off-site project features described in Section PDFs, SCs, and MMs above apply                                                                        Less than significant
3.3.4 are located in already developed areas and
would not include any activities with the potential for
significant impacts associated with geology/soils.
Additionally, the PDFs and SCs identified for the
on-site project features would also apply to off-site
project features.




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                                                                             TABLE 1-1 (Continued)
                                                                      SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                           AND MITIGATION PROGRAM

                                                                                                                                                            Level of Significance
         Environmental Impact Analysis                                                        Mitigation Program                                              After Mitigation
Caltrans-related Project Feature Impacts
The SR-241/Weir Canyon Road interchange, SC 3-1, SC 3-2, SC 3-3, MM 3-1, and MM 3-2                                                                      Less than significant
SR-241 bridge overcrossing, and other proposed
project features within Caltrans right-of-way,
including remedial grading along SR-91, would be
subject to similar geotechnical constraints and
potentially significant impacts as the on-site project
features described above.         Due to the soil
conditions, the interchange and bridge overcrossing
would not be subject to liquefaction and Impact
4.3-2 would not apply.
Construction activities and facilities within Caltrans
right-of-way would be subject to an encroachment
permit and would meet Caltrans requirements as
identified in the mitigation program.
SECTION 4.4 – HYDROLOGY
On-Site Project Feature Impacts                        Project Design Features
The proposed project would increase the amount of PDF 4-1                  The Mountain Park Specific Plan includes a Proposed Drainage System Less than significant
runoff from the project site; however, it would not                        Plan (refer to Exhibit 3-9). Prior to approval of the first mass grading plan,
create or contribute runoff water that would exceed                        the property owner/developer shall submit a Drainage and Runoff
the capacity of existing or planned stormwater                             Management Plan (RMP) to the Department of Public Works for review
drainage systems or provide substantial additional                         and approval. The RMP shall demonstrate substantial conformance with
sources of polluted runoff.                                                the Proposed Drainage System included in the Mountain Park Specific
                                                                           Plan. The Drainage and Runoff Management Plan shall include the
                                                                           approximate timing for construction of the following drainage facilities:
                                                                           a.   Gypsum Canyon Road/SR-91 Box Culvert Modification: A 1,500
                                                                                linear foot culvert modification will be constructed at the downstream
                                                                                end of Gypsum Canyon to address existing deficiencies and
                                                                                accommodate proposed peak flows from the project site. The
                                                                                proposed storm drain improvement plan will extend the Gypsum
                                                                                Canyon Road/SR-91 box culvert inlet structure approximately 1,500
                                                                                feet upstream following the existing alignment of the Gypsum
                                                                                Canyon Creek. At this location, the proposed Gypsum Canyon
                                                                                Road will be designed to serve as an impoundment to retain storm
                                                                                water runoff up to approximately 17 feet, which produces sufficient
                                                                                hydraulic head to convey 5,500 cfs through the culvert into Featherly
                                                                                Park. The elevation difference between the flow line of the culvert
                                                                                inlet and the top of the road is expected to be approximately 20 feet,

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                                                                                                                                                             Draft EIR No. 331

                                                                        TABLE 1-1 (Continued)
                                                                 SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                      AND MITIGATION PROGRAM

                                                                                                                                                       Level of Significance
     Environmental Impact Analysis                                                         Mitigation Program                                            After Mitigation
                                                                           allowing for a freeboard of three feet. The extension of the culvert
                                                                           upstream, with the described design modifications to the inlet
                                                                           control, will prevent flooding onto Gypsum Canyon Road during
                                                                           large storm events. The proposed modification of the culvert will
                                                                           improve the flood control design capacity of the culvert from a
                                                                           10-year storm event to a 100-year storm event. A confirmation of
                                                                           the structural integrity and design calculations of the existing culvert
                                                                           structure shall be completed prior to final design of the new box
                                                                           culvert extension.
                                                                      b.   West Drainage Area Storm Drain Improvement: Minor storm drain
                                                                           improvements to an existing undersized 36-inch reinforced concrete
                                                                           pipe (RCP) that collects off-site runoff from the undisturbed slopes
                                                                           draining into The Summit will be upsized to the capacity of a 54-inch
                                                                           RCP for proper conveyance of the project flows into the existing
                                                                           66-inch RCP.
                                                                      c.   SR-91/Gypsum Canyon Road Storm Drain Improvement: A minor
                                                                           storm drain improvement will be implemented for the 4-acre sub-
                                                                           area that used to drain into the existing culvert inlet but will not
                                                                           adequately drain after the culvert extension. The improvement will
                                                                           consist of a riser tower and a RCP (size to be determined) to collect
                                                                           the flows and connect directly into the triple box culvert at the
                                                                           approximate location of the existing culvert inlet.
                                                                      d.   Featherly Regional Park Channel Improvements: The improvements
                                                                           to the box culvert outlet for energy dissipation of flood flows will
                                                                           include a concrete apron followed by riprap to reduce velocities
                                                                           down to the 10-12 feet per second (fps) range. Riprap will also be
                                                                           added to the embankments beyond the concrete apron. To provide
                                                                           additional stabilization of the channel downstream, flow velocities
                                                                           will be decreased to the range of 10-12 fps where turf-reinforced
                                                                           mesh blankets will be used, and vegetation re-established along the
                                                                           channel bottom and embankments. Turf-reinforced blankets (or
                                                                           equivalent alternatives) will continue along the embankment up to a
                                                                           maximum of 340 feet beyond the riprap leading up to the existing
                                                                           road crossing. Prior to approval of a grading permit, the property
                                                                           owner/developer shall provide evidence to the Department of Public
                                                                           Works that the design and construction of these improvements have
                                                                           been approved by the County of Orange Harbors, Beaches and
                                                                           Parks Department.


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                                                                                                                                                                   Draft EIR No. 331

                                                                            TABLE 1-1 (Continued)
                                                                     SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                          AND MITIGATION PROGRAM

                                                                                                                                                               Level of Significance
         Environmental Impact Analysis                                                        Mitigation Program                                                 After Mitigation
                                                                          e.   Outlet Points to Natural Channels: Energy dissipation/velocity
                                                                               reduction devices will be employed to ensure flows are released at
                                                                               non-erosive velocities. Such devices may include: riprap,
                                                                               geotextiles, granule filters, fills, grade control structures and/or check
                                                                               dams, or equivalent measures.
                                                                          f.   Vegetated floodwall for Community Center: As part of final design, a
                                                                               vegetated floodwall would be incorporated into the portion of the
                                                                               slope downstream of the community center as necessary to satisfy
                                                                               flood control requirements.
The proposed project would alter the topography PDF 4-1                                                                                                     Less than significant
and land cover in the project site and new
impervious surfaces would be introduced in
proposed Development Areas. These changes
would increase the erosion from the project site
which is discussed in Section 4.5, Water Quality.
However, the proposed project would not
substantially alter the existing drainage patterns of
the site.
Due to the increase in impervious surface and PDF 4-1                                                                                                       Less than significant
change in drainage patterns on-site, the proposed
project has the potential to change the flow velocity
and/or volume of stormwater runoff.
The proposed project would not result in substantial PDF 4-1                                                                                                Less than significant
increases in the rate or amount of surface water
runoff in a manner that would result in flooding on-
or off-site. There would not be a significant change
in the floodplain for Gypsum Canyon Creek. There
would be no structures, including housing, within a
100-year flood elevation or flood hazard area as
mapped on a federal Flood Hazard Boundary or
Flood Insurance Rate Map or other flood hazard
delineation map.




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                                                                                                                                                  Draft EIR No. 331

                                                                             TABLE 1-1 (Continued)
                                                                      SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                           AND MITIGATION PROGRAM

                                                                                                                                            Level of Significance
           Environmental Impact Analysis                                               Mitigation Program                                      After Mitigation
The proposed project would not deplete No mitigation is required                                                                          No impact
groundwater supplies. Groundwater in the project
site is not currently used for drinking water or
irrigation, and would not be used as a water supply
for the proposed development.          Groundwater
supplies would potentially increase due to the
cessation of groundwater pumping by on-site quarry
operations.
The project would be consistent with relevant PDF 4-1                                                                                     No impact
hydrology-related goals and policies outlined in the
City of Anaheim General Plan.
Off-site Project Feature Impacts
With the exception of proposed improvements to PDF 4-1                                                                                    Less than significant
the Featherly Regional Park drainage, the off-site
roadway and infrastructure improvements do not
involve any activities or features that would result in
potentially significant impacts related to hydrology
during construction or operation. The proposed
improvements within the Featherly Regional Park
(described in PDF 4-1) are proposed to reduce
potential increases in flow velocities resulting from
the project.
Caltrans-related Project Feature Impacts                PDF 4-1 and                                                                       Less than significant.
The impervious surfaces associated with the Project Design Features
SR-241/Weir Canyon Road interchange and
                                                     PDF 4-2 The Mountain Park Specific Plan includes a Proposed Drainage System
SR-241 bridge overcrossing, as well as the change
in drainage patterns affecting Caltrans facilities           Plan (refer to Exhibit 3-9), which includes drainage improvements within
along SR-241 and SR-91 were addressed through                Caltrans right-of-way. Prior to issuance of an Encroachment Permit, the
the impact analysis conducted for on-site changes            property owner/developer shall submit a Drainage Plan to Caltrans for
in hydrology. The proposed project grading and               review and approval. The Drainage Plan shall demonstrate substantial
development would require modifications to the               conformance with the Proposed Drainage System included in the
design of Caltrans’ drainage facilities along SR-241         Mountain Park Specific Plan. The Drainage Plan shall include the
and SR-91. These design changes would not result             approximate timing for construction of the following drainage facilities:
in significant hydrology impacts and must be                 • SR-241 Drainage Improvements: The improvements along the SR-241
approved by Caltrans prior to issuance of an                   include the abandonment of the existing 72-inch corrugated steel pipe
encroachment permit.                                           (CSP) in lieu of a 54-inch RCP, the modification of the 42-inch CSP
                                                               outlet structure, the modification of several smaller drainage systems
                                                               draining into the proposed 54-inch RCP and 42-inch CSP and the
                                                               implementation of five Caltrans swales within the Caltrans right-of-way.

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                                                                               TABLE 1-1 (Continued)
                                                                        SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                             AND MITIGATION PROGRAM

                                                                                                                                                                   Level of Significance
         Environmental Impact Analysis                                                               Mitigation Program                                              After Mitigation
SECTION 4.5 – WATER QUALITY
On-site Project Feature Impacts                                      Project Design Features                                                                    Less than significant
With the exception of total suspended solids (TSS), PDF 5-1                      In furtherance of the Orange County Drainage Area Management
the amount of pollutants in the runoff from the                                  Plan/City of Anaheim Local Implementation Plan (DAMP/LIP)
project site would increase with the proposed                                    requirements, the Mountain Park Specific Plan includes the following
project due to the increases in stormwater runoff                                project design features that shall be incorporated into the final project
volumes resulting from increases in impervious                                   Water Quality Management Plan (WQMP). These design features meet
areas. The amount of TSS would decrease as the                                   or exceed the requirements of the DAMP/LIP. Prior to approval of each
amount of sediment from the site would be reduced,                               mass or rough grading plan, the property owner/developer shall submit
primarily due to the elimination of mining                                       the Final WQMP to the Department of Public Works incorporating the
operations.                                                                      following measures:
                                                                                 a.   Site Design BMPs: The following site design BMPs are practices
                                                                                      designed to minimize runoff and the introduction of pollutants in storm
                                                                                      water runoff.
                                                                                      Minimize Impervious Area and Impervious Areas Directly Connected
                                                                                      to Storm Drains
                                                                                      • Minimize impervious areas by incorporating landscaped areas over
                                                                                        substantial portions of the project area consistent with the
                                                                                        Development Plan and Concept Landscape Plans. Single family
                                                                                        residential landscape areas shall be determined by zoning
                                                                                        development standards, including setbacks, lot coverage, street
                                                                                        parkway standards, and design objectives;
                                                                                      • Minimize directly connected impervious area by draining parking
                                                                                        lots to landscaped areas or bioretention facilities to promote
                                                                                        filtration and infiltration of storm water, if landscaping slopes are
                                                                                        less than 2 percent and the project is not adjacent to steep slopes;
                                                                                      • Utilize vegetated areas, e.g., setbacks, swales, end islands, and
                                                                                        median strips, for biofiltration and bioretention of nuisance and
                                                                                        storm runoff flows from parking lots and other impervious areas;
                                                                                      • Design sidewalks to drain into landscaping and swales prior to
                                                                                        discharging to the storm water conveyance system;
                                                                                      Selection of Construction Materials and Design Practices
                                                                                      • Select building material for roof gutters and downspouts that do not
                                                                                        include copper or zinc;


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                                                                        TABLE 1-1 (Continued)
                                                                 SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                      AND MITIGATION PROGRAM

                                                                                                                                                    Level of Significance
     Environmental Impact Analysis                                                      Mitigation Program                                            After Mitigation
                                                                         • Construct streets, sidewalks, and parking lot aisles to the minimum
                                                                           widths specified in the Anaheim Municipal Code or adopted
                                                                           Specific Plan and in compliance with the Development Plan and
                                                                           regulations for the Americans with Disabilities Act and safety
                                                                           requirements for fire and emergency vehicle access. Incorporate
                                                                           landscaped buffer areas between sidewalks and streets in
                                                                           compliance with the Development Plan and Anaheim Municipal
                                                                           Code;
                                                                         Conserve Natural Areas
                                                                         • Preserve existing riparian areas along Gypsum Canyon Creek and
                                                                           protect with buffer zones per the Development Plan;
                                                                         • Preserve 2,163 acres of open space within the project boundary
                                                                           outside of the development area, including NCCP open space
                                                                           areas, open space devoted to conservation easements, and other
                                                                           open space;
                                                                         • Concentrate or cluster development on the least environmentally
                                                                           sensitive portions of the project site (e.g., the quarry site) while
                                                                           leaving the remaining land in a natural, undisturbed condition;
                                                                         • Use natural drainage systems to the maximum extent practicable
                                                                           or create drainages (e.g., vegetated swales) that mimic natural
                                                                           conveyances and allow for storm water infiltration as well as
                                                                           pollutant removal;
                                                                         • Maximize canopy interception and water conservation by
                                                                           preserving existing native trees and shrubs in natural open space
                                                                           areas outside of the development area, incorporating new trees
                                                                           into project design pursuant to landscape and reforestation plan,
                                                                           and including native or drought resistant plants in development
                                                                           plant palettes.
                                                                         Protect Slopes and Channels
                                                                         • Protect slopes: minimize erosion potential with vegetative cover,
                                                                           route flows safely away from steep and/or sensitive slopes,
                                                                           stabilize disturbed slopes;




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                                                                        TABLE 1-1 (Continued)
                                                                 SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                      AND MITIGATION PROGRAM

                                                                                                                                                       Level of Significance
     Environmental Impact Analysis                                                        Mitigation Program                                             After Mitigation
                                                                           • Protect channels: control and treat flows in landscaping and/or
                                                                             other controls prior to reaching existing natural drainage systems,
                                                                             stabilize channel crossings, ensure that increases in runoff velocity
                                                                             and frequency caused by the project do not erode the channel,
                                                                             install energy dissipaters, such as riprap, at the outlets of storm
                                                                             drains or conveyances.
                                                                      b.   Source Control BMPs: The following source control BMPs shall be
                                                                           implemented in order to minimize the amount of pollutants in dry
                                                                           weather (nuisance) flows and in storm water runoff from the project.
                                                                           Non-Structural Source Control BMPs
                                                                           N1      Education for property owners, tenants and occupants–
                                                                           practical information materials shall be provided to the first
                                                                           residents/occupants/ tenants on general housekeeping practices that
                                                                           contribute to the protection of storm water quality. The Homeowner’s
                                                                           Association (HOA) shall have an ongoing educational material
                                                                           distribution program. At a minimum, these materials shall cover the
                                                                           following topics:
                                                                           1.   The use of chemicals (including household type) that should be
                                                                                limited to the property, and avoidance of discharge of specified
                                                                                wastes via hosing or other means to gutters, catch basins, and
                                                                                storm drains.
                                                                           2.   The proper importance of appropriate irrigation techniques and
                                                                                proper handling/application of material such as fertilizers,
                                                                                herbicides, pesticides, cleaning solutions, paint products,
                                                                                automotive products, and swimming pool chemicals, and
                                                                                swimming pool drainage.
                                                                           3.   The environmental and legal impacts of illegal dumping of
                                                                                harmful substances into storm drains and sewers.
                                                                           4.   Alternative household products that are safer to the environment.
                                                                           5.   Household hazardous waste collection programs.
                                                                           6.   Used oil-recycling programs.
                                                                           7.   Proper procedures for spill prevention and clean up.




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                                                                        TABLE 1-1 (Continued)
                                                                 SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                      AND MITIGATION PROGRAM

                                                                                                                                                    Level of Significance
     Environmental Impact Analysis                                                      Mitigation Program                                            After Mitigation
                                                                         8.   Proper storage of materials that pose pollution risks to local
                                                                              waters.
                                                                         9.   Carpooling programs and public transportation alternatives to
                                                                              driving.
                                                                         N2      Activity   restrictions   (Conditions,   Covenants,    and
                                                                         Restrictions)–Conditions, Covenants, and Restrictions (CC&Rs) shall
                                                                         be prepared as necessary and shall address surface water quality
                                                                         protection, or, alternatively, use restrictions shall be developed
                                                                         through lease terms.
                                                                         N3      Common area landscape management–ongoing maintenance
                                                                         shall be consistent with City of Anaheim Landscape Water Efficiency
                                                                         (Chapter 10.19 of the Anaheim Municipal Code), plus fertilizer and/or
                                                                         pesticide usage shall be consistent with County Management
                                                                         Guidelines for Use of Fertilizers (DAMP Section 5.5). See also,
                                                                         efficient irrigation systems under structural controls.
                                                                         N4      BMP maintenance–Homeowners Associations (HOAs) shall
                                                                         be responsible for the inspection and maintenance of structural BMPs
                                                                         (including treatment controls) located within the HOA boundaries.
                                                                         These BMPs are outlined below.
                                                                         N11 Common area litter control–HOA shall conduct litter patrol;
                                                                         provide for covered trash receptacles, trashcans with lids, and
                                                                         emptying of trash receptacles in common areas; note trash disposal
                                                                         violations by tenants/homeowners or businesses and report the
                                                                         violations to the owner/HOA for investigation shall be conducted.
                                                                         N14 Common area drainage facility inspection–Privately-owned
                                                                         drainage facilities shall be inspected each year and, if necessary,
                                                                         cleaned and maintained prior to the storm season, no later than
                                                                                    st
                                                                         October 1 each year. Drainage facilities include catch basins and
                                                                         inlets, catch basin inserts, water quality basins, detention basins,
                                                                         other treatment facilities, and open drainage channels.
                                                                         N15 Street sweeping private streets and parking lots–Streets shall
                                                                         be swept prior to the storm season in late summer/early fall, no later
                                                                         than October 1st of each year. Parking lots at the private community
                                                                         center shall be swept weekly at a minimum, weather permitting.




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                                                                        TABLE 1-1 (Continued)
                                                                 SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                      AND MITIGATION PROGRAM

                                                                                                                                                       Level of Significance
     Environmental Impact Analysis                                                      Mitigation Program                                               After Mitigation
                                                                         Structural Source Control BMPs
                                                                         • Provide Storm Drain Stenciling and Signage – all storm drain inlets
                                                                           and catch basins, constructed or modified, within the project area
                                                                           shall be stenciled or labeled. Signs, which prohibit illegal dumping,
                                                                           shall be posted at public access points along channels and creeks
                                                                           within the project area. Legibility of stencils and signs shall be
                                                                           maintained.
                                                                         • Trash Area Design – trash areas shall be paved, designed not to
                                                                           allow run-on, screened or walled to prevent off-site transport of
                                                                           trash; and covered to minimize direct precipitation. Common area
                                                                           litter control shall include a litter patrol, covered trash receptacles,
                                                                           emptying of trash receptacles in a timely fashion, and noting trash
                                                                           violations by tenants/homeowners and reporting the violations to
                                                                           the owner/HOA for investigation. Connection of trash area drains
                                                                           to the municipal storm drain system shall be prohibited.
                                                                         • Efficient Irrigation – the timing and application methods of irrigation
                                                                           water in common areas shall minimize the runoff of excess
                                                                           irrigation water into the storm water conveyance system.
                                                                         • Protect Slopes and Channels – storm water BMPs shall be
                                                                           included to decrease the potential for erosion of slopes and/or
                                                                           channels, and may include appropriate conveyance structures,
                                                                           landscaping, etc.
                                                                         • Hillside Landscaping – Hillside areas that are disturbed by project
                                                                           development shall be landscaped with deep-rooted, drought
                                                                           tolerant plant species selected for erosion control.
                                                                         • Fire Station – Catch basin inserts with hydrocarbon absorption
                                                                           mats shall be provided for the fire station and vehicle maintenance
                                                                           shall be performed indoors and shall therefore not enter into the
                                                                           storm drain system because indoor drains flow to the sanitary
                                                                           sewer system.




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                                                                        TABLE 1-1 (Continued)
                                                                 SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                      AND MITIGATION PROGRAM

                                                                                                                                                          Level of Significance
     Environmental Impact Analysis                                                         Mitigation Program                                               After Mitigation
                                                                      c.   Treatment Control BMPs: The following treatment control BMPs are
                                                                           a part of the conceptual water quality treatment program included in
                                                                           the Mountain Park Specific Plan (refer to Exhibit 3-10). Prior to the
                                                                           issuance of grading permits, the property owner/developer shall
                                                                           include the following features in the final WQMP submitted to the
                                                                           Department of Public Works for review and approval.
                                                                           • Storm water runoff from the disturbance area shall be routed to
                                                                             nine water quality basins. Collectively, the water quality basins
                                                                             shall treat runoff from approximately 488 acres within the
                                                                             disturbance area. The water quality basins shall incorporate dry
                                                                             extended detention to provide water quality treatment for storm
                                                                             flows. Dry extended detention basins are designed with outlets
                                                                             that detain the runoff volume from the water quality design storm
                                                                             (e.g., the 85th percentile 24-hour event) for some minimum time
                                                                             (36 hours) to allow particles and associated pollutants to settle out.
                                                                           • The water quality basins shall incorporate wetland vegetation along
                                                                             the low flow channel in the bottom of the basin for the treatment of
                                                                             dry weather flows and small storm events. These basins shall not
                                                                             contain ponded or standing water for periods in excess of 48
                                                                             hours.
                                                                           • The park and school site shall have a water quality basin or BMP
                                                                             with equivalent treatment effectiveness with the sizing of the
                                                                             treatment based on the DAMP/LIP requirements.
                                                                           • Per the MS4 permit, the water quality basins within the proposed
                                                                             project shall be designed to contain a “water quality pool” sized to
                                                                             meet the maximized storm water capture volume for the area, from
                                                                             the formula recommended in Urban Runoff Quality Management,
                                                                             WEF Manual of Practice No. 23/ASCE Manual of Practice No. 87
                                                                             (1998). The water quality pool is designed to drain in 36 hours.
                                                                           • Approximately 4.1 acres of roadway that does not drain to the
                                                                             basins shall be treated with filter strips (a type of biofilter) designed
                                                                             per the MS4 permit and DAMP/LIP requirements treating a flow
                                                                             rate two times the 85th percentile hourly rainfall as determined by
                                                                             historical rainfall. The water tank located in Development Area 7
                                                                             shall also be treated using a filter strip or a bioswale, designed per
                                                                             DAMP/LIP requirements.


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                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                                                  Level of Significance
          Environmental Impact Analysis                                                                  Mitigation Program                                         After Mitigation
                                                                                       • Offsite roadway improvements shall be treated by BMPs providing
                                                                                         treatment equivalent to that provided by biofiltration (bioswales or
                                                                                         filter strips) sized pursuant to the criteria in the MS4 permit.
                                                                      Existing Regulations and Standard Conditions
                                                                      SC 5-1         Prior to approval of each mass or rough grading plan, the property
                                                                                     owner/developer shall submit a project water quality management plan
                                                                                     (WQMP) to the Department of Public Works for review and approval.
                                                                                     The WQMP shall demonstrate compliance with the implementation
                                                                                     plans under the MS4 Permit, namely the Drainage Area Management
                                                                                     Plan/Local Implementation Plan (DAMP/LIP).
                                                                      SC 5-2         Prior to the approval of grading plans, the property owner/developer
                                                                                     shall provide written evidence to the Department of Public Works that it
                                                                                     has filed a Notice of Intent with the Regional Water Quality Control
                                                                                     Board in order to obtain coverage under the Construction General
                                                                                     Permit (CGP) (NPDES No. CAS000002, Resolution No. 2001-046, or
                                                                                     the latest approved CGP). Pursuant to the permit requirements, the
                                                                                     property owner/developer shall develop a Stormwater Pollution
                                                                                     Prevention Plan (SWPPP) that incorporates Best Management
                                                                                     Practices for reducing or eliminating construction related pollutants in
                                                                                     the site runoff.
                                                                    Prior to approval of a grading plan, the Department of Public Works
                                                                      SC 5-3
                                                                    shall verify that the General Waste Discharge Requirements issued by
                                                                    the Santa Ana Regional Water Quality Control Board (RWQCB) Order
                                                                    No. R8-2003-0061, and NPDES No. CAG998001 (or latest approved
                                                                    equivalent) are in effect and shall govern discharges from construction
                                                                    dewatering and water line/sprinkler line testing should they occur during
                                                                    construction. The property owner/developer shall comply with these
                                                                    regulations including provisions requiring notification, testing and
                                                                    reporting of dewatering and testing-related discharges, which shall
                                                                    mitigate any impacts of such discharges.
There is a potential for water quality to be degraded SC 5-2 and SC 5-3                                                                       Less than significant
during construction of the proposed project primarily
due to the exposure of soils to rainfall/runoff and
wind. There is also a potential for non-sediment-
related pollutants (associated with construction
materials, liquid products, and petroleum products)
to degrade water quality.


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                                                                            TABLE 1-1 (Continued)
                                                                     SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                          AND MITIGATION PROGRAM

                                                                                                                                              Level of Significance
          Environmental Impact Analysis                                               Mitigation Program                                         After Mitigation
With the exception of the proposed fire station, the PDF 5-1                                                                               Less than significant
proposed project does not include any uses that
would include equipment fueling, outdoor
hazardous materials handling or storage, or delivery
areas/storage docks. The catch basins at the fire
station would be designed to reduce impacts to a
level considered less than significant.
The project would be consistent with relevant water PDFs and SCs above apply                                                               No impact
quality-related goals and policies outlined in the City
of Anaheim General Plan and SCAG RCPG.
Off-site Project Feature Impacts
As with proposed on-site project features, the SC 5-2, SC 5-3, and PDF 5-1.                                                                Less than significant
proposed off-site infrastructure and roadway
improvements have the potential to degrade water
quality during construction from increased erosion
and use of construction materials.
Off-site project features would be required to
incorporate best management practices (BMPs)
that meet or exceed the modeled performance
standards for water quality basins and bioswales.
Caltrans-related Project Feature Impacts          PDF 5-1 and                                                                              Less than significant
Similar to on-site and off-site project features Existing Regulations and Standard Conditions
discussed above, construction activities within SC 5-4        Prior to issuance of an Encroachment Permit by Caltrans for construction
Caltrans right-of-way have the potential to degrade           within Caltrans right-of-way, the property owner/developer shall prepare a
water quality. The amount of pollutants in the runoff         Water Pollution Control Program (WPCP) or Storm Water Pollution
from Caltrans right-of-way would increase due to              Prevention Plan (SWPPP), as required, in conformance with Caltrans
the increases in stormwater runoff volumes                    Standard Plans and Standard Specifications for Water Pollution Control.
resulting from increases in impervious areas.                 The property owner/developer shall provide Caltrans Permits Branch with
Water quality treatment facilities treating runoff from       a copy of the WPCP or SWPPP, including BMPs to be implemented for
areas within Caltrans right-of-way (if not being              construction activities, as required by the NPDES Statewide Storm Water
treated by on-site water quality features) would be           Permit for General Construction activities.
constructed in compliance with Caltrans design
requirements for water quality treatment facilities.




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                                                                                                                                                                         Draft EIR No. 331

                                                                               TABLE 1-1 (Continued)
                                                                        SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                             AND MITIGATION PROGRAM

                                                                                                                                                                     Level of Significance
         Environmental Impact Analysis                                                               Mitigation Program                                                After Mitigation
                                                                     SC 5-5      Prior to issuance of an Encroachment Permit by Caltrans for construction
                                                                                 within Caltrans right-of-way, a note shall be added to the grading plan
                                                                                 requiring that any construction activities within Caltrans right-of-way shall
                                                                                 be in compliance with the requirements of the Caltrans Statewide NPDES
                                                                                 Storm Water Permit, Order No. 99-06-DWQ, NPDES No. CAS000003, in
                                                                                 addition to the BMPs specified in the Caltrans Storm Water Management
                                                                                 Plan. When applicable, the property owner/developer shall also conform
                                                                                 to the requirements of the General NPDES Permit for Construction
                                                                                 Activities, Order N. 99-08-DWQ, NPDES No. CAS 000002, and any
                                                                                 subsequent General Permit in effect at the time of issuance of an
                                                                                 Encroachment Permit
SECTION 4.6 – BIOLOGICAL RESOURCES
On-site Project Feature Impacts                                      Project Design Features                                                                      Less than significant
The following plant and wildlife species listed by PDF 6-1                       Prior to approval of tentative tract or parcel maps, the project biologist
Federal or State agencies as threatened or                                       shall submit written verification in the form of a note on the tentative tract
endangered were observed on-site or have the                                     or parcel maps, that the project development boundaries are consistent
potential to occur. These species are covered or                                 with the Open Space, Trail and Bikeway Plan identified in Exhibit 3-8.
conditionally covered by the National Communities                                The proposed project includes 2,163 acres of preserved open space:
Conservation Plan/Habitat Conservation Plan                                      NCCP/ HCP Reserve (940 acres), The Nature Conservancy Anaheim
(NCCP/HCP): Santa Monica Mountains dudleya,                                      Conservation Easement (TNC ACE) (913 acres) and 310 acres of
coastal California gnatcatcher, and American                                     additional open space throughout the project site not related to the
peregrine falcon.                                                                NCCP/HCP Reserve or TNC ACE.
                                                                     Existing Regulations and Standard Conditions
                                                                     SC 6-4      Prior to approval of grading plans, the project biologist shall review the
                                                                                 following contract specifications to verify that the following measures to
                                                                                 minimize impacts to the coastal California gnatcatcher and other coastal
                                                                                 sage scrub (CSS) species have been included on the specifications. The
                                                                                 project biologist shall provide written evidence to the Department of Public
                                                                                 Works in the form of a note on the grading plans that this condition has
                                                                                 been completed.




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                                                                                                                                                             Draft EIR No. 331

                                                                        TABLE 1-1 (Continued)
                                                                 SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                      AND MITIGATION PROGRAM

                                                                                                                                                       Level of Significance
     Environmental Impact Analysis                                                        Mitigation Program                                             After Mitigation
                                                                      • To the maximum extent practicable, no grading of coastal sage scrub
                                                                        (CSS) habitat that is occupied by nesting gnatcatchers will occur during
                                                                        the breeding season (February 15 through July 15). It is expressly
                                                                        understood that this provision and the remaining provisions of these
                                                                        “construction-related minimization measures” are subject to public
                                                                        health and safety considerations.        These considerations include
                                                                        unexpected slope stabilization, erosion control measures and
                                                                        emergency facility repairs. In the event of such public health and safety
                                                                        circumstances, landowners or public agencies/utilities will provide
                                                                        United State Fish and Wildlife Service/California Department of Fish
                                                                        and Game (USFWS/CDFG) with the maximum practicable notice (or
                                                                        such notice as is specified in the Natural Communities Conservation
                                                                        Program/Habitat Conservation Plan (NCCP/HCP) to allow for capture of
                                                                        gnatcatchers, cactus wrens, and any other CSS Identified Species that
                                                                        are not otherwise flushed, and will carry out the following measures
                                                                        only to the extent as practicable in the context of the public health and
                                                                        safety considerations.
                                                                      • Prior to commencement of grading operations or other activities
                                                                        involving significant soil disturbance, all areas of CSS habitat to be
                                                                        avoided under the provisions of the NCCP/HCP, shall be identified with
                                                                        temporary fencing or other markers clearly visible to construction
                                                                        personnel.    Additionally, prior to the commencement of grading
                                                                        operations or other activities involving disturbance of CSS, a survey will
                                                                        be conducted to locate gnatcatchers and cactus wrens within 100 feet
                                                                        of the outer extent of projected soil disturbance activities and the
                                                                        locations of any such species shall be clearly marked and identified on
                                                                        the construction/grading plans.




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                                                                        TABLE 1-1 (Continued)
                                                                 SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                      AND MITIGATION PROGRAM

                                                                                                                                                          Level of Significance
     Environmental Impact Analysis                                                           Mitigation Program                                             After Mitigation
                                                                      • A monitoring biologist, acceptable to USFWS/CDFG will be on-site
                                                                        during any clearing of CSS. The landowner or relevant public
                                                                        agency/utility will advise USFWS/CDFG at least seven (7) calendar
                                                                        days [and preferably fourteen (14) calendar days] prior to the clearing
                                                                        of any habitat occupied by Identified Species to allow USFWS/CDFG to
                                                                        work with the monitoring biologist in connection with bird
                                                                        flushing/capture activities. The monitoring biologist will flush Identified
                                                                        Species (avian or other mobile Identified Species) from occupied
                                                                        habitat areas immediately prior to brush-clearing and earth-moving
                                                                        activities. If birds cannot be flushed, they will be captured in mist nets, if
                                                                        feasible, and relocated to areas of the site to be protected or to the
                                                                        NCCP/HCP Reserve System. It will be the responsibility of the
                                                                        monitoring biologist to assure that Identified bird species will not be
                                                                        directly impacted by brush-clearing and earth-moving equipment in a
                                                                        manner that also allows for construction activities on a timely basis.
                                                                      • Following the completion of initial grading/earth movement activities, all
                                                                        areas of CSS habitat to be avoided by construction equipment and
                                                                        personnel will be marked with temporary fencing and other appropriate
                                                                        markers clearly visible to construction personnel. No construction
                                                                        access, parking, or storage of equipment or materials will be permitted
                                                                        within such marked areas.
                                                                      • In areas bordering the NCCP Reserve System or Special
                                                                        Linkage/Special Management areas containing significant CSS
                                                                        identified in the NCCP/HCP for protection, vehicle transportation routes
                                                                        between cut-and-fill locations will be restricted to a minimum number
                                                                        during construction consistent with project construction requirements.
                                                                        Waste dirt or rubble will not be deposited on adjacent CSS identified in
                                                                        the NCCP/HCP for protection. Pre-construction meetings involving the
                                                                        monitoring biologist, construction supervisors, and equipment operators
                                                                        will be conducted and documented to ensure maximum practicable
                                                                        adherence to these measures.
                                                                      • CSS identified in the NCCP/HCP for protection and located within the
                                                                        likely dust drift radius of construction areas shall be periodically sprayed
                                                                        with water to reduce accumulated dust on the leaves as recommended
                                                                        by the monitoring biologist.




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                                                                           TABLE 1-1 (Continued)
                                                                    SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                         AND MITIGATION PROGRAM

                                                                                                                                                                Level of Significance
     Environmental Impact Analysis                                                                Mitigation Program                                              After Mitigation
                                                                 Mitigation Measure
                                                                 MM 6-1      Prior to initiation of construction activities, the property owner/developer
                                                                             shall retain a project biological monitor approved by both the United
                                                                             States Fish and Wildlife Services and California Department of Fish and
                                                                             Game. The project biological monitor shall ensure that all permit
                                                                             conditions are met, all mitigation measures are properly implemented, and
                                                                             that the project complies with all standard conditions and project design
                                                                             features. The project biological monitor shall also be present during any
                                                                             pre-grade meetings, mass grading operations, and periodically during
                                                                             construction to ensure that sensitive resources designated for
                                                                             preservation are properly protected. Beginning with the initiation of
                                                                             construction or grading activities, the project biological monitor shall
                                                                             submit monthly status reports to the Planning Department to demonstrate
                                                                             compliance with this measure.
                                                                 MM 6-6      Prior to approval of mass grading plans, the property owner/developer
                                                                             shall submit copies of contractor specifications to the Department of
                                                                             Public Works that include the following requirements to protect nesting
                                                                             birds regulated by the Migratory Bird Treaty Act: “When feasible,
                                                                             vegetation removal activities shall be scheduled between July 16 and
                                                                             February 14 to avoid the nesting season. This would ensure that no active
                                                                             nests would be disturbed and that removal could proceed rapidly. If
                                                                             vegetation removal activities shall occur during the nesting season
                                                                             (February 15 to July 15), all suitable habitat shall be thoroughly surveyed
                                                                             for the presence of nesting birds by a qualified biologist prior to removal. If
                                                                             any active nests are detected, the area shall be flagged, along with a
                                                                             minimum 50-foot buffer (buffer may range between 50 and 300 feet as
                                                                             determined by the monitoring biologist), and shall be avoided until the
                                                                             nesting cycle is complete or it is determined by the monitoring biologist
                                                                             that the nest has failed.” In addition, a biologist shall be present on the
                                                                             site to monitor the vegetation removal to ensure that nests not detected
                                                                             during the initial survey are not disturbed. The project biological monitor
                                                                             shall provide written notification to the Planning Department that these
                                                                             requirements have been accomplished following completion of grading
                                                                             activities associated with each grading permit.




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                                                                             TABLE 1-1 (Continued)
                                                                      SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                           AND MITIGATION PROGRAM

                                                                                                                                                 Level of Significance
         Environmental Impact Analysis                                              Mitigation Program                                              After Mitigation
The proposed project would impact habitat for the Mitigation Measure                                                                          Less than significant
southwestern willow flycatcher which is a species
                                                  MM 6-2       Prior to the approval of mass grading plans impacting jurisdictional areas,
conditionally covered by the NCCP/HCP. (Impact
                                                               the property owner/developer shall provide a wetland mitigation plan
4.6-1)
                                                               approved by the ACOE and CDFG to the Department of Public Works. A
                                                               total of 14.1 acres of riparian mitigation are necessary to offset the loss of
                                                               ACOE and CDFG jurisdictional areas as a result of the proposed project.
                                                               A Conceptual Wetland and Riparian Habitat Mitigation Plan has been
                                                               prepared by JSA (February, 2005). The purpose of the mitigation plan is
                                                               to:
                                                                           • Create (establish), restore, or enhance wetland/riparian habitats on-site
                                                                             to the maximum extent practicable to minimize the on-site loss of
                                                                             ACOE and CDFG jurisdictional acreage and function, and provide off-
                                                                             site mitigation for the remainder of the impacts;
                                                                           • To implement, to the extent practicable, off-site mitigation in the Santa
                                                                             Ana River watershed, as close to the study area as possible or
                                                                             otherwise at a key ecological site;
                                                                           • To return jurisdictional habitats that are temporarily disturbed during
                                                                             construction to pre-construction conditions; and,
                                                                           • To ensure that adjacent non-jurisdictional habitats are protected.
                                                                           The preferred on-site mitigation approach shall be approved by the
                                                                           ACOE, CDFG and RWQCB during the permitting process. One possible
                                                                           component of the on-site mitigation, to address the impacts of the box
                                                                           extension on the already disturbed Gypsum Canyon Creek channel, could
                                                                           include a rebuilt creek as a low-flow riparian corridor through the canyon
                                                                           mouth area. Conceptually, the box extension shall act as a high-flow by-
                                                                           pass that efficiently conveys the more intense and destructive flood flows.
                                                                           The riparian corridor shall extend upstream to the road crossing of
                                                                           Gypsum Canyon Creek. The riparian corridor shall consist of a riverine
                                                                           channel flanked by planted embankments. The riverine channel would be
                                                                           soft bottom and the riparian vegetated floor would be nurtured by low and
                                                                           seasonal run-off diverted into it from a channel split from the new box
                                                                           culvert opening. This "splitter" shall consist of a junction opening that
                                                                           becomes a tunnel that would accommodate storm flows as well as wildlife
                                                                           movement under the road crossing to the riparian corridor.




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                                                                             TABLE 1-1 (Continued)
                                                                      SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                           AND MITIGATION PROGRAM

                                                                                                                                                Level of Significance
          Environmental Impact Analysis                                             Mitigation Program                                             After Mitigation
                                                     MM 6-3     Prior to approval of mass grading plans, the property owner/developer
                                                                shall submit copies of contractor specifications to the Department of
                                                                Public Works that include the following note: “Initial clearing of vegetation
                                                                that has been identified as being used by the southwestern willow
                                                                flycatcher shall be conducted outside of the breeding season or with the
                                                                presence of a biological monitor during the breeding season to ensure
                                                                that no individuals of this species are directly impacted. The breeding
                                                                season for the southwestern willow flycatcher is between May 15 and July
                                                                31.” Following completion of initial clearing of vegetation, the project
                                                                biological monitor shall provide written evidence to the Planning
                                                                Department that this measure has been completed.
Braunton’s milk-vetch is federally-listed as No mitigation is required                                                                        No impact
endangered and is not covered by the NCCP/HCP.
This species was observed onsite but not within the
proposed Development Area. No direct or indirect
impacts to this species would occur.
The following sensitive plant and wildlife species No mitigation is required                                                                  No impact
listed by Federal or State agencies as threatened or
endangered are not expected to occur on-site:
Laguna Beach dudleya, Santa Ana River
woollystar, thread-leaved brodiaea, arroyo toad,
California red-legged frog, western yellow-billed
cuckoo, San Diego fairy shrimp, Riverside fairy
shrimp, quino checkerspot butterfly, least Bell’s
vireo, and Pacific pocket mouse.
The Santa Ana Sucker is a federally threatened No mitigation is required                                                                      No impact
species that was not observed onsite or expected to
occur. However, this species occurs in the Santa
Ana River (downstream of Prado Dam), which
receives runoff from the project site. Recently
designated critical habitat for this species did not
include areas downstream of Prado Dam.
Tecate cypress is a sensitive plant species No mitigation is required                                                                         No impact
observed onsite but would not be impacted by
project development. This species is also covered
by the NCCP/HCP.




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                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                                                      Level of Significance
         Environmental Impact Analysis                                                                  Mitigation Program                                               After Mitigation
Coulter’s matilija poppy and Catalina mariposa lily                   PDF 6-1                                                                                      Less than significant
are sensitive species observed onsite that would be
impacted by the project; however, they are fully-
covered under the NCCP/HCP. NCCP/HCP
covered species not observed, but with the potential
to occur within the project site include Nuttall’s
scrub oak and heart-leaved pitcher sage.
The proposed project would impact approximately                       PDF 6-1 and                                                                                  Less than significant
30 percent of the foothill mariposa lily population
observed on-site. This species is conditionally                       Existing Regulations and Standard Conditions
covered under the NCCP/HCP.                                           SC 6-7        Prior to approval of mass or rough grading plans, the project biological
                                                                                    monitor shall provide written verification to the Department of Public
                                                                                    Works that the appropriate provisions of the comprehensive mitigation
                                                                                    program for the foothill mariposa lily approved by the United State Fish
                                                                                    and Wildlife Service (USFWS) and California Department of Fish and
                                                                                    Game (CDFG) in March 2004 for the Irvine Company’s “North Ranch”
                                                                                    projects (including the Mountain Park Specific Plan project) shall be
                                                                                    implemented consistent with the approved plan The March 2004
                                                                                    mitigation program is included in Appendix E.
The proposed project would impact approximately PDF 6-1 and                                                                                Less than significant
35 percent (approximately 7,000 individuals) of
many-stemmed dudleya on-site. (Impact 4.6-2)    Mitigation Measure
                                                MM 6-4       Prior to approval of mass grading plans for Development Areas 1, 2, 3, 4
                                                             and 7, the project biological monitor shall provide to the Planning
                                                             Department a translocation program for the many-stemmed dudleya. The
                                                             project biological monitor shall provide written notification to the Planning
                                                             Department when the translocation program has been completed. The
                                                             Mountain Park many-stemmed dudleya translocation program shall utilize
                                                             the following techniques:
                                                                                    • Relocation of corms from impact areas to receptor sites. The relocation
                                                                                      of topsoil including corms (topsoil relocation method) shall occur in late
                                                                                      fall/early winter (November-January). Corm salvage using the “soil
                                                                                      sieving method” shall occur when soils are still dry; therefore, as early
                                                                                      as possible between October and December. Corms collected using
                                                                                      the “soil sieving method” shall be replanted as soon as possible after
                                                                                      collection (November-January).




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                                                                             TABLE 1-1 (Continued)
                                                                      SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                           AND MITIGATION PROGRAM

                                                                                                                                                           Level of Significance
          Environmental Impact Analysis                                                        Mitigation Program                                            After Mitigation
                                                                           • Seed collection from impact areas followed by hand broadcasting at
                                                                             appropriate receptor sites; and, seed collection with propagation,
                                                                             nursery rearing, and translocation to appropriate sites. Seed collection
                                                                             would occur in late spring (May-June).
The following sensitive plant species were observed PDF 6-1                                                                                             Less than significant
on-site or have the potential to occur and are not
covered by       the NCCP/HCP:          Long-spined
spineflower,    chaparral      nolina,   Robinson’s
peppergrass and Hall’s monardella.
Numerous non-listed wildlife species were observed PDF 6-1, MM 6-6 and                                                                        Less than significant
on-site or have the potential to occur. These
species are either covered by the NCCP/HCP or Mitigation Measure
would have sufficient habitat in on-site preserved MM 6-5     Prior to approval of street improvement plans for Gypsum Canyon Road,
open space areas.                                             the property owner/developer shall submit copies of contractor
                                                              specifications to the Department of Public Works that include the following
                                                              requirements to protect the summer roost of Yuma myotis within the
                                                              Gypsum Canyon culverts under the 91 Freeway: (1) construction
                                                              activities to lengthen the culverts shall be scheduled outside of the critical
                                                              breeding time (May 1 through August 15) to avoid direct impacts, If
                                                              construction must occur between May 1 and August 15, all construction
                                                              activities shall occur outside the current culverts and no deeper than 25
                                                              feet inside the culverts to avoid a negative effect on the colony, (3) no
                                                              night work shall occur around the culvert openings and only construction
                                                              lighting necessary for safety purposes shall be used near the culvert
                                                              openings. Following completion of construction activities associated with
                                                              the culverts, the project biological monitor shall provide written notification
                                                              to the Planning Department that the contractor specifications have been
                                                              complied with.
The golden eagle and prairie falcon are No mitigation is required                                                                             No impact
conditionally covered NCCP/HCP species that have
been observed on-site. Pursuant to NCCP
guidelines, activities that are more than ½ mile from
an active or historically active nesting site may
proceed without minimization or mitigation
requirements. The project impact areas are more
than ½ mile from potential nesting areas.




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                                                                               TABLE 1-1 (Continued)
                                                                        SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                             AND MITIGATION PROGRAM

                                                                                                                                         Level of Significance
          Environmental Impact Analysis                                         Mitigation Program                                          After Mitigation
The proposed project would remove 221.8 acres of PDF 6-1, SC 6-4 and                                                                  Less than significant
plant communities considered sensitive by the Existing Regulations and Standard Conditions
resource agencies (namely CDFG) including 213.5
acres of coastal sage scrub, and 8.3 acres of coast SC 6-5   Prior to approval of mass or rough grading plans, the property
live oak. Impacts to these communities are covered           owner/developer shall report the amount of coastal sage scrub that would
under the NCCP/HCP. The 43.0 acres of Tecate                 be impacted by proposed grading activities. The amount of coastal sage
Cypress Forest on-site would be preserved.                   scrub impacts shall be noted on plans submitted for grading permits and
                                                             submitted to the Planning Department and to the Nature Reserve of
                                                             Orange County (NROC) to ensure that a proper accounting of coastal
                                                             sage scrub impacts is recorded for purposes of the NCCP/HCP.
                                                              On an annual basis until grading activities are complete, the property
                                                                     SC 6-6
                                                              owner/developer shall provide the Planning Department and Nature
                                                              Reserve of Orange County (NROC) with a calculation of the total amount
                                                              of coastal sage scrub that has been removed during the calendar year.
The proposed project would impact a total of 2.1 PDF 6-1, MM 6-2 and                                                                    Less than significant
acres of cottonwood-willow riparian woodland on- Existing Regulations and Standard Conditions
site. (Impact 4.6-3)
                                                 SC 6-1       Prior to approval of mass or rough grading plans impacting jurisdictional
                                                              areas, the property owner/developer shall provide written evidence to the
                                                              Department of Public Works that compliance with the provisions of
                                                              Section 1602 of the California Fish and Game Code have been complied
                                                              with. This shall be accomplished by providing a copy of the executed
                                                              Streambed Alteration Agreement.
                                                                     SC 6-2   Prior to approval of mass or rough grading plans impacting jurisdictional
                                                                              areas, the property owner/developer shall provide the Department of
                                                                              Public Works with a copy of the executed Section 404 permit obtained
                                                                              from the Army Corp of Engineers (ACOE).
                                                                     SC 6-3   Prior to approval of mass or rough grading plans, the property
                                                                              owner/developer shall provide the Department of Public Works with a
                                                                              copy of the Section 401 water quality certification obtained from the
                                                                              Regional Water Quality Control Board (RWQCB).




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                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                         Level of Significance
           Environmental Impact Analysis                                                            Mitigation Program                      After Mitigation
Project implementation would also result in the                       PDF 6-1                                                         Less than significant
direct removal of 339.4 acres of several non-
sensitive plant communities including 296.0 acres
of chaparral communities, 16.5 acres of annual
grassland communities, 2.0 acres of sumac
savannah, 14.2 acres of oak savannah, 2.7 acres of
mule fat scrub, 4.4 acres of mule fat scrub/coast
live oak woodland, 0.2 acre of Mexican elderberry
woodland, and 3.4 acres of cliff and rock
communities.         These communities are not
considered sensitive by resource agencies and
impacts to them would not reduce these
communities       below    self-perpetuating  levels
throughout the region. In addition, substantial
amounts of each community are preserved in open
space.
The proposed project would impact 6.25 acres of                       SC 6-1, SC 6-2, SC 6-3, and MM 6-2                              Less than significant
waters of the U.S., and 10.73 acres of CDFG
jurisdiction on-site. (Impact 4.6-4)
The proposed project would interfere with the local                   PDF 6-1                                                         Less than significant
movement of resident wildlife. However, it provides
additional buffer areas in the form of the ACE and
other open space beyond the NCCP/HCP Reserve
boundary, and avoids the ridge separating
Mountain Park from Coal Canyon. Under the
NCCP/HCP, it was determined that the Reserve
design incorporated sufficient connectivity for
purposes of wildlife movement that impacts of
development within development areas designated
by the NCCP/HCP do not require further mitigation.
The proposed project would be consistent with the                     PDFs, SCs, and MMs above apply                                  No impact
provisions of the NCCP/HCP and the goals and
policies of other relevant planning documents
related to biological resources.
Off-site Project Feature Impacts
Off-site project features would not impact suitable No mitigation is required                                                         No impact
habitat for federally-or state-listed, or special status
plant and/or wildlife species.



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                                                                                 TABLE 1-1 (Continued)
                                                                          SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                               AND MITIGATION PROGRAM

                                                                                                                                                                     Level of Significance
          Environmental Impact Analysis                                           Mitigation Program                                                                    After Mitigation
Off-site project features would impact 0.2 acre of PDF 6-1, SC 6-1, SC 6-2, SC 6-3, and MM 6-2                                                                    Less than significant
sycamore riparian woodland. (Impact 4.6-3)
1.2 acres of coastal sage scrub habitat would be
impacted; however, this habitat is an NCCP-
covered species. There would be no impacts within
the NCCP/HCP Reserve area.
Off-site project features would impact 0.31 acre of SC 6-1, SC 6-2, SC 6-3, and MM 6-2                                                                            Less than significant
waters of the U.S., and 0.5 acre of CDFG
jurisdiction. (Impact 4.6-4)
Off-site project features would not result in habitat No mitigation is required                                                                                   No impact
fragmentation.
Caltrans-related Project Feature Impacts              No mitigation is required                                                                                   No impact
Project features within Caltrans right-of-way would
not impact suitable habitat for federally- or state-
listed, or special status plant and/or wildlife species.
Project features within Caltrans right-of-way would                   No mitigation is required                                                                   No impact
not be within NCCP/HCP Reserve areas.
Project features within Caltrans right-of-way would                   SC 6-1, SC 6-2, SC 6-3, and MM 6-2                                                          Less than significant
impact 0.002 acre of waters of the U.S., and 0.012
acre of CDFG jurisdiction. (Impact 4.6-4)
Project features within Caltrans right-of-way would                   No mitigation is required                                                                   No impact
not impact wildlife movement, including the Coal
Canyon Biological Corridor.
SECTION 4.7 – TRAFFIC AND CIRCULATION
The traffic and circulation analysis addresses on-site,               off-site, and Caltrans-related project feature impacts.
At buildout, the proposed project would generate                      Project Design Features                                                                     Less than significant
25,145 daily trips (2,325 of which would be
generated in the AM peak hour and 2,522 of which                      PDF 7-1       The Mountain Park Specific Plan includes a circulation system consisting
would be generated during the PM peak hour). No                                     of on-site roadways (refer to Exhibit 4.7-5). The tentative tract or parcel
                                                                                    maps submitted for review and approval, will incorporate preliminary
significant impacts to study intersections would
occur under the following traffic scenarios: Existing                               street design features (i.e. cross-sections, alignment and grades)
Conditions Plus Project, Year 2010 (Committed                                       demonstrating consistency with the proposed circulation system. Prior to
Circulation Plus Project) Conditions.                                               approval of each tentative tract or parcel map, the subdivision map shall
                                                                                    be prepared consistent with the Mountain Park Specific Plan Circulation
                                                                                    System Plan (Exhibit 4.7-5) to the satisfaction of the City Engineer. All
                                                                                    street improvements within the subdivision map shall be completed prior
                                                                                    to the final building and zoning inspection for units served by said
                                                                                    improvement.


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                                                                           TABLE 1-1 (Continued)
                                                                    SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                         AND MITIGATION PROGRAM

                                                                                                                                                           Level of Significance
     Environmental Impact Analysis                                                              Mitigation Program                                           After Mitigation
                                                                 PDF 7-2   The Mountain Park Specific Plan includes a circulation system including
                                                                           the following off-site roadway improvements (refer to Exhibit 4.7-5)
                                                                           identified in the Mountain Park Specific Plan, the City of Anaheim General
                                                                           Plan and Orange County Master Plan of Arterial Highways. The
                                                                           development area plans and tentative tract or parcel maps, submitted for
                                                                           review and approval, shall incorporate preliminary street design features
                                                                           (i.e. cross-sections, alignment and grades) demonstrating that the
                                                                           proposed circulation system is consistent with that defined in the
                                                                           Mountain Park Specific Plan, the City of Anaheim General Plan and the
                                                                           Orange County Master Plan of Arterial Highways.

                                                                           • Gypsum Canyon Road − Improved from a two-lane undivided roadway
                                                                             to a four-lane divided roadway from the SR-91 westbound off-ramp to
                                                                             the proposed Santa Ana Canyon Road realignment. A construction
                                                                             contract for improvements to this portion of Gypsum Canyon Road shall
                                                                             be awarded prior to issuance of the first building permits in
                                                                             development areas east of SR-241. The improvements shall be
                                                                             substantially completed prior to final building and zoning inspection for
                                                                             the first phase of development for areas east of SR-241.
                                                                           • Santa Ana Canyon Road – Realign and improve from a two-lane
                                                                             undivided roadway to a four-lane divided roadway from SR-241 to
                                                                             Gypsum Canyon Road. A construction contract for improvements to
                                                                             this portion of Santa Ana Canyon Road shall be awarded prior to
                                                                             issuance of the first building permits in development areas east of
                                                                             SR-241. The improvements shall be substantially completed prior to
                                                                             final building and zoning inspection for the first phase of development
                                                                             for areas east of SR-241.
                                                                           • Weir Canyon Road (Oak Canyon Drive to Blue Sky Way) – Restripe
                                                                             approximately 600-feet to transition from a six-lane roadway at Oak
                                                                             Canyon Drive to a four-lane roadway at Blue Sky Way prior to issuance
                                                                             of building permits for Development Areas 3 and 7.

                                                                           • Weir Canyon Road (Blue Sky Way to SR-241) − Construct as a four-
                                                                             lane divided roadway from Blue Sky Way to SR-241 (includes
                                                                             elimination of the northbound left-turn lane at the Weir Canyon
                                                                             Road/Blue Sky Road intersection). Improvements to this portion of
                                                                             Weir Canyon Road shall be completed prior to final building and zoning
                                                                             inspection for Development Areas 3 and 7.


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                                                                        TABLE 1-1 (Continued)
                                                                 SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                      AND MITIGATION PROGRAM

                                                                                                                                                    Level of Significance
     Environmental Impact Analysis                                                       Mitigation Program                                           After Mitigation
                                                                      • Gypsum Canyon Road and SR-91 Westbound Ramp intersection – Add
                                                                        second northbound through lane.          A construction contract for
                                                                        improvements to this portion of intersection shall be awarded prior to
                                                                        issuance of building permits for development areas east of SR-241.
                                                                        The improvements shall be substantially completed prior to final
                                                                        building and zoning inspection for the first phase of development for
                                                                        areas east of SR-241.
                                                                      • Gypsum Canyon Road and SR-91 Eastbound Ramp intersection – Add
                                                                        second northbound and southbound through lanes. A construction
                                                                        contract for improvements to this portion of intersection shall be
                                                                        awarded prior to issuance of building permits in development areas
                                                                        east of SR-241. The improvements shall be substantially completed
                                                                        prior to final building and zoning inspection for the first phase of
                                                                        development areas for east of SR-241.
                                                                      • Gypsum Canyon Road/Santa Ana Canyon Road intersection – Improve
                                                                        to provide two southbound through lanes and a southbound right-turn
                                                                        lane, two northbound through lanes and a northbound left-turn lane,
                                                                        and two eastbound left-turn lanes and an eastbound right-turn lane. A
                                                                        construction contract for improvements to this intersection shall be
                                                                        awarded prior to first building permits in development areas east of
                                                                        SR-241. The improvements shall be substantially completed prior to
                                                                        final building and zoning inspection for the first phase of development
                                                                        for areas east of SR-241.
                                                                      • Oak Canyon Drive, east of Running Springs Road – This portion of Oak
                                                                        Canyon Drive within City right-of-way will be abandoned by the City of
                                                                        Anaheim and improved with a vehicle maintenance road and
                                                                        landscaping (see Exhibit 3-17). The maintenance road will be gated.
                                                                        Improvements associated with this portion of Oak Canyon Drive within
                                                                        City right-of-way shall be substantially completed prior to issuance of
                                                                        the first building permits in development areas west of SR-241.




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                                                                           TABLE 1-1 (Continued)
                                                                    SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                         AND MITIGATION PROGRAM

                                                                                                                                                              Level of Significance
     Environmental Impact Analysis                                                               Mitigation Program                                             After Mitigation
                                                                 PDF 7-3     The proposed project includes the construction of the SR-241/Weir
                                                                             Canyon Road interchange with ramps to and from the south on SR-241
                                                                             and construction of a bridge over SR-241 for Mountain Park Drive. Prior
                                                                             to completion of the Mountain Park Drive bridge over-crossing, the design
                                                                             for the construction of the SR-241/Weir Canyon Road interchange shall
                                                                             be awarded. Construction of the SR-241/Weir Canyon Road interchange
                                                                                                                             st
                                                                             shall be completed prior to issuance of the 421 building permit on the
                                                                             east side of SR-241.
                                                                 PDF 7-4     The proposed project includes the construction of a bridge over SR-241
                                                                             for Mountain Park Drive. Prior to opening of models for development
                                                                             areas east of SR-241, the Mountain Park Drive over-crossing construction
                                                                             shall be completed.
                                                                 Existing Regulations and Standard Conditions
                                                                 SC 7-1      Prior to the issuance of each building permit, the Foothill/Eastern
                                                                             Transportation Corridor Major Thoroughfare and Bridge Fees shall be
                                                                             paid by the property owner/developer to the City of Anaheim. Payment of
                                                                             these fees provides for the project’s fair share contribution to the ultimate
                                                                             improvements to SR-241 and SR-261.
                                                                 Mitigation Measures
                                                                 MM 7-3      Prior to the approval of each development area plan, the property
                                                                             owner/developer shall submit a traffic phasing plan. The plan shall be
                                                                             reviewed and approved by the Department of Public Works, Development
                                                                             Services Division and Traffic Engineering Division, and the Fire
                                                                             Department. The plan shall also be submitted for review and comment by
                                                                             Caltrans if any portion of the plan involves Caltrans facilities. The plan
                                                                             shall include the following items:
                                                                             1.   Documentation of the number of units and product types of each
                                                                                  development area, and resulting Level of Service (LOS) shall be
                                                                                  provided for locations listed in PDF 7-2.
                                                                             2.   Phasing of roadway construction, specifying which roads shall be
                                                                                  constructed as backbone streets and which roads shall be
                                                                                  constructed with tract development.
                                                                             3.   Traffic improvements (including signals, signage and striping) to local
                                                                                  streets, arterials and intersections, freeway interchanges and bridge
                                                                                  over-crossings.


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                                                                              TABLE 1-1 (Continued)
                                                                       SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                            AND MITIGATION PROGRAM

                                                                                                                                                              Level of Significance
         Environmental Impact Analysis                                                              Mitigation Program                                          After Mitigation
                                                                              4.   Identification of measures that will be incorporated to minimize the
                                                                                   impacts of project construction traffic on Gypsum Canyon Road
                                                                                   between the SR-91 westbound off-ramp and Santa Ana Canyon
                                                                                   Road; Gypsum Canyon Road/SR-91 interchange ramps; and Santa
                                                                                   Ana Canyon Road between Gypsum Canyon Road and Weir Canyon
                                                                                   Road prior to completion of the improvements listed in PDF 7-2.
                                                         Prior to approval of a grading plan for each development area, the
                                                                     MM 7-4
                                                         property owner/developer shall submit a traffic control plan including
                                                         construction haul routes, duration and location of lane closures, and any
                                                         pedestrian-related impacts to sidewalks and intersection crossings, for
                                                         review and approval by the Department of Public Works, Development
                                                         Services Division and Traffic Engineering Division.
                                                                                                                                                                1
The Weir Canyon Road/La Palma Avenue Mitigation Measures                                                                             Significant and unavoidable
intersection would operate at LOS E during the AM MM 7-1 Prior to issuance of first building permit, the property owner/developer
peak hour under the Year 2025 Committed                  shall make one lump sum payment for the fair share of the cost to the City
Circulation System “no project” and “with project”       of Anaheim for implementation of the following roadway and intersection
scenarios as well as the Year 2025 MPAH Buildout         improvements. Evidence of payment shall be provided to the Department
“with project” scenario. The project’s contribution to   of Public Works.
the intersection capacity utilization (ICU) value at
this intersection under these scenarios is estimated     • Weir Canyon Road/La Palma Avenue Intersection – (1) Add a third
to be .01 which would be a significant impact.              northbound through lane and convert southbound right-turn lane to
(Impact 4.7-1)                                              shared third through/right-turn lane, and (2) convert the second
                                                            eastbound through lane to a shared second through/second right-turn
Based on the project’s significant impact at the Weir       lane (this would require eliminating the existing eastbound right-turn
Canyon Road/La Palma Avenue intersection, the               green arrow overlap with the northbound left-turn movement). The first
project is also assumed to significantly impact Weir        improvement is committed to be constructed before the year 2010 by
Canyon Road south of the intersection (between              the Cities of Anaheim and Yorba Linda using secured Orange County
SR-91 and La Palma Avenue) under the same                   Measure M funds and matching local funds that have yet to be
scenarios. (Impact 4.7-2)                                   allocated. The property owner/developer is responsible for paying its
                                                            fair share of the funds that have yet to be allocated. The second
                                                            improvement is not funded and the applicant shall be responsible for
                                                            paying its fair share of the entire cost of the improvement. The project
                                                            share of future AM and PM peak hour traffic at this intersection under
                                                            2025 MPAH build-out conditions with the East Orange GPA and MPAH
                                                            Amendments is approximately 37 percent.

    1
        Impacts 4.7-1 and 4.7-2 are considered significant and unavoidable since the improvements required to mitigate these impacts are dependent on approval and financing from the
        City of Yorba Linda. Although the project’s impact is mitigated by payment of fair-share costs for improvements by the property owner/developer, the City of Anaheim cannot
        require another jurisdiction to implement these improvements.


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                                                                            TABLE 1-1 (Continued)
                                                                     SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                          AND MITIGATION PROGRAM

                                                                                                                                                            Level of Significance
         Environmental Impact Analysis                                                         Mitigation Program                                             After Mitigation
                                                                          • Weir Canyon Road between La Palma Avenue and SR-91- Improve
                                                                            from a four-lane divided roadway to a six-lane divided roadway. This
                                                                            roadway is committed to be improved by the Cities of Anaheim and
                                                                            Yorba Linda using secured Orange County Measure M funds and
                                                                            matching local funds that have yet to be allocated. The property
                                                                            owner/developer is responsible for paying its fair share of the funds that
                                                                            have yet to be allocated. The project share of future AM and PM peak
                                                                            hour traffic on this roadway under 2025 MPAH build-out conditions with
                                                                            the East Orange GPA and MPAH Amendments is approximately 30
                                                                            percent.
                                                                          • Weir Canyon Road/Santa Ana Canyon Road Intersection - Convert
                                                                            eastbound third through lane to third left-turn lane. This is a non-
                                                                            committed long-range improvement and the applicant shall be
                                                                            responsible for paying its fair share of the entire cost of the
                                                                            improvement. The project share of future AM and PM peak hour traffic
                                                                            at this intersection under 2025 MPAH build-out conditions with the East
                                                                            Orange GPA and MPAH Amendments is approximately 35 percent.
The project’s contribution to the Weir Canyon MM 7-1                                                                                                     Less than significant
Road/Santa Ana Canyon intersection ICU value
would be .03 under the 2025 (MPAH buildout) and
.04 under the 2025 (MPAH buildout with East
Orange GPA and MPAH Amendments), which
constitutes a significant contribution of future traffic
for a location such as this where long-range non-
committed improvements have been identified in
the City of Anaheim General Plan. (Impact 4.7-3)
The proposed project would not exceed, either PDF 7-1, PDF 7-2, PDF 7-3, and PDF 7-4                                                                     Less than significant
individually or cumulatively, a level of service
standard established by the Orange County
Congestion Management Program (CMP) for the
following roads and highways in the Mountain Park
traffic analysis study area: SR-91, SR-241 and
Imperial Highway.




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                                                                             TABLE 1-1 (Continued)
                                                                      SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                           AND MITIGATION PROGRAM

                                                                                                                                                          Level of Significance
            Environmental Impact Analysis                                                   Mitigation Program                                               After Mitigation
Due to its steep grade, Mountain Park Drive has the Mitigation Measures                                                                                Less than significant
potential for increased hazards related to speed
and visibility. (Impact 4.7-4)                           MM 7-2        Prior to approval of street improvement plans for Mountain Park Drive, the
                                                                       property owner/developer shall provide a final roadway design plan to the
                                                                       Department of Public Works with Mountain Park Drive designed to
                                                                       Modified Hillside Collector standards and with curvilinear alignments that
                                                                       provide adequate sight distance for safety purposes as approved by City
                                                                       Engineer.
Parking would be provided for residential and non- No mitigation is required                                                                           No impact
residential (private community recreation center, fire
station, etc.), and would be consistent with the
parking requirements outlined in the proposed
Mountain Park Specific Plan Amendment and the
City of Anaheim Municipal Code.
Access to the proposed project would be provided No mitigation is required                                                                             No impact
from Santa Ana Canyon Road and Gypsum Canyon
Road to the north and from a proposed extension of
Weir Canyon Road to the west. In addition, the
project would provide roadway design features to
facilitate emergency access/service.
The proposed project includes public and private No mitigation is required                                                                             No impact
sidewalks and trails, as well as on-street bikeways
to accommodate the recreational and transportation
needs of residents.
The project would be consistent with relevant PDFs, SCs, and MMs above apply                                                                           No impact
traffic/circulation-related goals and policies of the
City of Anaheim and SCAG.
SECTION 4.8 – AIR QUALITY
The air quality analysis addresses on-site, off-site, and Caltrans-related project feature impacts.
Project-related grading activities would result in a Construction: Particulate Emission (PM10) Control                                                 Significant and unavoidable
significant short-term construction-related air quality                                                                                                impact
impact for the following air pollutants: CO, ROG, MM 8-1
                                                                       Prior to approval of the first grading plan, the following requirements shall
NOX and PM10. (Impact 4.8-1)                                           be incorporated into the Storm Water Pollution Prevention Program
                                                                       (SWPPP) and Erosion and Sedimentation Control Plan submitted for
                                                                       review and approval by the Department of Public Works. During
                                                                       construction of the proposed project, the property owner/development and
                                                                       its contractors shall be required to comply with regional rules, which shall
                                                                       assist in reducing short-term air pollutant emissions. SCAQMD Rule 402
                                                                       requires that air pollutant emissions not be a nuisance off-site. SCAQMD
                                                                       Rule 403 requires that fugitive dust be controlled with the best available
                                                                       control measures so that the presence of such dust does not remain

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                                                                        TABLE 1-1 (Continued)
                                                                 SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                      AND MITIGATION PROGRAM

                                                                                                                                                       Level of Significance
     Environmental Impact Analysis                                                           Mitigation Program                                          After Mitigation
                                                                      visible in the atmosphere beyond the property line of the emission source.
                                                                      Two options are presented in Rule 403: monitoring of particulate
                                                                      concentrations or active control. Monitoring involves a sampling network
                                                                      around the project with no additional control measures unless specified
                                                                      concentrations are exceeded. The active control option does not require
                                                                      any monitoring, but requires that a list of measures be implemented
                                                                      starting with the first day of construction.
                                                                      Rule 403 requires that “No person conducting active operations without
                                                                      utilizing the applicable best available control measures included in Table 1
                                                                      of this Rule to minimize Fugitive dust emissions from each fugitive dust
                                                                      source type within the active operation.” The measures from Table 1 of
                                                                      Rule 403 are presented in Table 15 in Appendix H. The applicable
                                                                      measures presented in Table 1 are required to be implemented by
                                                                      Rule 403.
                                                                      Rule 403 requires that “Large Projects” implement additional measures. A
                                                                      Large Project is defined as “any active operations on property which
                                                                      contains 50 or more acres of disturbed surface area; or any earth-moving
                                                                      operation with a daily earth-moving or throughput volume of 3,850 cubic
                                                                      meters (5,000 cubic yards) or more three times during the most recent
                                                                      365 day period. Grading of the project will be considered a Large Project
                                                                      under Rule 403. Therefore, the project will be required to implement the
                                                                      applicable actions specified in Table 2 of the Rule. Table 2 from Rule 403
                                                                      is presented in Table 16 of Appendix H. As a Large Operation, the project
                                                                      will also be required to:
                                                                      • Submit a fully executed Large Operation Notification (SCAQMD Form
                                                                        403N) to the SCAQMD Executive Officer within 7 days of qualifying as
                                                                        a large operation;
                                                                      • Include, as part of the notification, the name(s), address(es), and phone
                                                                        number(s) of the person(s) responsible for the submittal, and a
                                                                        description of the operation(s), including a map depicting the location of
                                                                        the site;
                                                                      • Maintain daily records to document the specific dust control actions
                                                                        taken, maintain such records for a period of not less than three years;
                                                                        and make such records available to the Executive Officer upon request.




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                                                                        TABLE 1-1 (Continued)
                                                                 SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                      AND MITIGATION PROGRAM

                                                                                                                                                        Level of Significance
     Environmental Impact Analysis                                                       Mitigation Program                                               After Mitigation
                                                                      • Install and maintain project signage with project contact signage that
                                                                        meets the minimum standards of the Rule 403 Implementation
                                                                        Handbook, prior to initiating any earthmoving activities.
                                                                      • Identify a dust control supervisor that is employed by or contracted with
                                                                        the property owner/developer, is on the site or available on-site within
                                                                        30 minutes during working hours, has the authority to expeditiously
                                                                        employ sufficient dust mitigation measures to ensure compliance with
                                                                        all Rule requirements, and has completed the AQMD Fugitive Dust
                                                                        Control Class and has been issued a valid Certificate of Completion for
                                                                        the class.
                                                                      • Notify the SCAQMD Executive Officer in writing within 30 days after the
                                                                        site no longer qualifies as a large operation.
                                                                      Rule 403 also requires that the construction activities “shall not cause or
                                                                      allow PM10 levels exceed 50 micrograms per cubic meter when
                                                                      determined by simultaneous sampling, as the difference between upwind
                                                                      and down wind sample.”           Large Projects that cannot meet this
                                                                      performance standard are required to implement the applicable actions
                                                                      specified in Table 3 of Rule 403. Table 3 from Rule 403 is presented in
                                                                      Table 17 of Appendix H. Rather than perform monitoring to determine
                                                                      conformance with the performance standard, which will not reduce PM10
                                                                      emissions, the project shall implement all applicable measures presented
                                                                      in Rule 403 Table 3 regardless of conformance with the Rule 403
                                                                      performance standard. This potentially results in a higher reduction of
                                                                      particulate emissions than if these measures were implemented only after
                                                                      being determined to be required by monitoring.
                                                                      Further, Rule 403 requires that that the project shall not “allow track-out to
                                                                      extend 25 feet or more in cumulative length from the point of origin from
                                                                      an active operation.” All track-out from an active operation is required to
                                                                      be removed at the conclusion of each workday or evening shift. Any
                                                                      active operation with a disturbed surface area of five or more acres or with
                                                                      a daily import or export of 100 cubic yards or more of bulk materials must
                                                                      utilize at least one of the measures listed in Table 18 of Appendix H at
                                                                      each vehicle egress from the site to a paved public road:




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                                                                           TABLE 1-1 (Continued)
                                                                    SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                         AND MITIGATION PROGRAM

                                                                                                                                                              Level of Significance
     Environmental Impact Analysis                                                               Mitigation Program                                             After Mitigation
                                                                 Construction: Construction Equipment Emission Control
                                                                 MM 8-2      Prior to approval of grading plans, the property owner/developer shall
                                                                             include the following notes on the contractor specifications submitted for
                                                                             review and approval by the Department of Public Works: “To reduce
                                                                             construction equipment emissions, the following measures shall be
                                                                             implemented when feasible.
                                                                             • Use low emission mobile construction equipment. The property owner/
                                                                               developer shall comply with CARB requirements for heavy construction
                                                                               equipment.
                                                                             • Maintain construction equipment engines by keeping them tuned.
                                                                             • Use low sulfur fuel for stationary construction equipment. This is
                                                                               required by SCAQMD Rules 431.1 and 431.2.
                                                                             • Utilize existing power sources (i.e., power poles) when feasible. This
                                                                               measure would minimize the use of higher polluting gas or diesel
                                                                               generators.
                                                                             • Configure construction parking to minimize traffic interference.
                                                                             • Minimize obstruction of through-traffic lanes. When feasible,
                                                                               construction should be planned so that lane closures on existing streets
                                                                               are kept to a minimum.
                                                                             • Schedule construction operations affecting traffic for off-peak hours.
                                                                             • Develop a traffic plan to minimize traffic flow interference from
                                                                               construction activities (the plan may include advance public notice of
                                                                               routing, use of public transportation and satellite parking areas with a
                                                                               shuttle service.
                                                                             • Use aqueous diesel fuel where feasible and reasonably commercially
                                                                               available.
                                                                             • Use cooled exhaust gas recirculation (EGR) where feasible and
                                                                               reasonably commercially available.




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                                                                               TABLE 1-1 (Continued)
                                                                        SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                             AND MITIGATION PROGRAM

                                                                                                                                                 Level of Significance
          Environmental Impact Analysis                                             Mitigation Program                                               After Mitigation
                                                                Several of the mitigation measures listed above are advanced emission
                                                                control technologies, which are currently not commercially available. For
                                                                example, aqueous diesel fuel reduces NOX formation by reducing
                                                                combustion temperatures, resulting in lower NOX emissions. According to
                                                                the SCAQMD, the current availability of this fuel technology is limited, and
                                                                it may not be available for use for the project. In addition, with EGR diesel
                                                                engines, a small amount of hot exhaust gas is routed through a cooler
                                                                and mixed with fresh air entering the engine. The exhaust gas helps
                                                                reduce the temperature during combustion, which lowers the formation of
                                                                thermal NOX. EGR technology is in the development phase, and has not
                                                                been fully commercialized. To the extent that the advanced emissions
                                                                control technologies become reasonably commercially available, or are
                                                                required by the CARB from grading contractors, then such advanced
                                                                emissions control technologies will be used.
Project-related regional air emissions would exceed Regional Operational Impacts                                                              Significant and unavoidable
established thresholds for the following air                                                                                                  impact
                                                    MM 8-3      The property owner/developer shall reduce operation-related emissions
pollutants: CO, ROG, and NOX. (Impact 4.8-2)
                                                                through implementation of practices identified in SCAQMD’s CEQA
                                                                Handbook and the URBEMIS2002 model. SCAQMD’s CEQA Handbook
                                                                includes several measures that can be used to minimize emissions
                                                                associated with residential projects. In addition, the URBEMIS2002
                                                                model identifies several measures, some of which overlap those in the
                                                                CEQA Handbook. The following measures, based on these sources,
                                                                shall be implemented by the property owner/developer and contractors,
                                                                where feasible to reduce criteria pollutant emissions from stationary
                                                                sources directly related to the project. Said measures shall be included
                                                                on plans submitted for residential building permits:
                                                                               • install solar or low-emission water heaters;
                                                                               • use central water-heating systems;
                                                                               • use built-in, energy-efficient appliances; and
                                                                               • ensure that sidewalks and pedestrian paths are installed throughout the
                                                                                 project area.
                                                                      MM 8-4   All buildings shall comply with Title 24, Part 6. Reducing the need to heat
                                                                               or cool structures by improving thermal integrity will result in a reduced
                                                                               expenditure of energy and a reduction in pollutant emissions. Any
                                                                               necessary written evidence and/or standard details demonstrating
                                                                               compliance with Title 24, Part 6, shall be included on plans submitted for
                                                                               building permits.

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                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                                                      Level of Significance
          Environmental Impact Analysis                                                            Mitigation Program                                                     After Mitigation
The proposed project contributes to a net increase                    MM 8-1, MM 8-2, MM 8-3, and MM 8-4                                                           Significant and unavoidable
in CO, NOX, PM10 and ROG. Therefore, the                                                                                                                           cumulative impact
proposed project would have a significant
cumulative air quality impact. (Impact 4.8-3)
Construction and operation of the proposed project                    MM 8-1, MM 8-2, MM 8-3, and MM 8-4                                                           Significant and unavoidable
would expose sensitive receptors to pollutant                                                                                                                      impact
concentration that exceed SCAQMD thresholds.
(Impact 4.8-4)
The project would be consistent with relevant air                     MM 8-1, MM 8-2, MM 8-3, and MM 8-4                                                           No impact
quality-related goals and policies of the City of
Anaheim General Plan, SCAG’s RCPG, and the
South Coast Air Quality Management Plan.
SECTION 4.9 − NOISE
On-site Project Feature Impacts                                       Existing Regulations and Standard Conditions                                                 Less than significant
Construction activities in Development Areas 3 and                    SC 9-1       Prior to approval of grading plans and/or prior to issuance of building
7 would be adjacent to existing residences west of                                 permits, plans shall include a note indicating that noise-generating project
the project site. Noise levels generated by general                                construction activities in the City of Anaheim shall not occur between the
grading and construction within 3,000 feet of                                      hours of 7:00 p.m. and 7:00 a.m. This requirement applies to construction
residences may occasionally exceed the 60 dBA                                      activities within 3,000 feet of residential uses, consistent with the City of
limit in the Anaheim Noise Ordinance at the nearest                                Anaheim Noise Ordinance.
existing homes and would expose these residences
to noise levels that exceed City noise standards.
The proposed project may require blasting during                      MM 3-3 in Section 4.3, Geology and Soils                                                     Less than significant
construction. Blasting activities could potentially
result in significant noise and vibration impacts.
(Impact 4.9-1)
Proposed uses within Development Areas 3, 4, 5                        Project Design Features                                                                      Less than significant
and 7 adjacent to SR-241, SR-91, and Weir Canyon
Road would be exposed to noise levels in excess of                    PDF 9-1      The Mountain Park Specific Plan includes a conceptual grading plan. The
the City of Anaheim Noise Element exterior noise                                   conceptual grading plan includes berms in the following locations as
standard of 65 CNEL. (Impact 4.9-2)                                                shown on Exhibit 4.9-7 that would reduce exterior noise levels in areas
                                                                                   behind the berms to less than 65 CNEL. Prior to the approval of grading
                                                                                   plans for development areas that require sound attenuation measures, the
                                                                                   property owner/developer shall submit grading plans to the Department of
                                                                                   Public Works that demonstrate conformance with the conceptual grading
                                                                                   plan included in the Specific Plan, including the following:
                                                                                   •   Ten to 40 foot high berms (above pad elevation) along SR-241 in
                                                                                       Development Area 4.


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                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                                                       Level of Significance
          Environmental Impact Analysis                                                               Mitigation Program                                                 After Mitigation
                                                                                  •   Intermittent berms with heights 10 to 20 feet above pad elevations
                                                                                      are also included along SR-91 in Development Area 5. Final berm
                                                                                      design shall be shown on precise grade permits for specific builder
                                                                                      projects.
                                                                      Mitigation Measures
                                                                      MM 9-1      Prior to the approval of grading plans for Development Areas 3, 4, 5, and
                                                                                  7, a detailed acoustical analysis shall be prepared by a qualified
                                                                                  acoustical consultant and submitted to the Planning Department for
                                                                                  review and approval. This acoustical analysis shall describe and quantify
                                                                                  the noise sources impacting the area and the measures required to meet
                                                                                  the 65 CNEL exterior residential noise standard. The final precise grading
                                                                                  plans shall incorporate the noise barriers (wall, berm or combination
                                                                                  wall/berm) required by the analysis and the property owner/developer
                                                                                  shall install these barriers. Based on the preliminary analysis, noise
                                                                                  barriers of the heights shown in Exhibit 4.9-7 would reduce exterior noise
                                                                                  levels at on-site residences to acceptable levels.
                                                                      SC 9-2      Prior to approval of grading plans and/or prior to issuance of building
                                                                                  permits, plans shall include a note indicating that noise-generating project
                                                                                  construction activities north of SR-91 in the City of Yorba Linda shall not
                                                                                  occur between the hours of 8:00 p.m. and 7:00 a.m. Monday through
                                                                                  Saturday and at any time on Sunday or federal holidays, consistent with
                                                                                  the City of Yorba Linda Noise Ordinance.
Interior noise levels from traffic at proposed uses PDF 9-1 and                                                                                Less than significant
within Development Areas 3, 4, 5, 6 and 7 would
exceed the noise standards outlined in the City of Mitigation Measures
Anaheim Noise Element. (Impact 4.9-3)               MM 9-2      Prior to issuance of building permits for all buildings in the areas indicated
                                                                in Exhibit 4.9-8, documentation shall be provided to the Planning
                                                                Department, Building Division showing that the building meets the
                                                                ventilation standards required by the Anaheim Building Code with
                                                                windows closed. Alternatively, the property owner/developer shall show
                                                                that based on the buildings location relative to the roadway it meets the
                                                                appropriate interior noise standard with open windows.
                                                                      MM 9-3      Prior to issuance of building permits, a detailed acoustical study using
                                                                                  architectural plans shall be prepared by a qualified acoustical consultant
                                                                                  and submitted to the Planning Department, Building Division for
                                                                                  residential structures (including the residential portion of the fire station) in
                                                                                  the areas indicated in Exhibit 4.9-9. This report shall describe and


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                                                                             TABLE 1-1 (Continued)
                                                                      SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                           AND MITIGATION PROGRAM

                                                                                                                                                 Level of Significance
          Environmental Impact Analysis                                               Mitigation Program                                            After Mitigation
                                                                quantify the noise sources impacting the building(s), the amount of
                                                                outdoor-to-indoor noise reduction provided in the architectural plans, and
                                                                any upgrades required to meet the City’s interior noise standards (45
                                                                CNEL for residences). The measures described in the report shall be
                                                                incorporated into the architectural plans for the buildings and implemented
                                                                with building construction.
The proposed water pump station in Development Mitigation Measures                                                                            Less than significant
Area 5 has the potential to generate noise levels in
exceedance of the City’s noise standard. (Impact MM 9-4         Prior to the issuance of building permits for the water pump station, a
4.9-4)                                                          detailed noise assessment shall be prepared by a qualified acoustical
                                                                consultant and submitted to the Planning Department for review and
                                                                approval. The assessment shall utilize noise data provided by the
                                                                manufacturer(s) of the equipment utilized at the station or noise
                                                                measurements from substantially similar facilities to project noise levels at
                                                                the residences in the vicinity of the water pump station. Compliance with
                                                                the City’s Noise Ordinance shall be demonstrated and any measures
                                                                required to meet the Noise Ordinance shall be described and incorporated
                                                                into the plans for the water pump station.
The project would be consistent with relevant noise- PDFs and MMs above apply                                                                 No impact
related goals and policies of the City of Anaheim
and SCAG.
Off-site Project Feature Impacts
The following off-site project features have the SC 9-1 and SC 9-2                                                                           Less than significant
potential to result in noise impacts to surrounding
uses during construction: removal of the existing
Oak Canyon Road east of Running Springs Drive
(adjacent     to     existing   residences),   and
improvements to Weir Canyon Road just west of
the project boundaries (adjacent to existing
residences).
Caltrans-related Project Feature Impacts
The following project features within Caltrans right- SC 9-1                                                                                 Less than significant
of-way have the potential to result in noise impacts
to surrounding uses during construction: SR-241/
Weir Canyon Road interchange, Mountain Park
Drive bridge overcrossing, improvements to
Gypsum Canyon Road and the SR-91 ramps at
Gypsum Canyon Road (adjacent to Featherly
Regional Park campground). Noise levels

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                                                                             TABLE 1-1 (Continued)
                                                                      SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                           AND MITIGATION PROGRAM

                                                                                                                                               Level of Significance
          Environmental Impact Analysis                                              Mitigation Program                                           After Mitigation
generated by pile driving (loudest construction
activity) for the bridge overcrossing and
SR-241/Weir Canyon Road interchange would
exceed the 60 dBA limit in the Anaheim Noise
Ordinance at the nearest occupied residences.
SECTION 4.10 − HAZARDS AND HAZARDOUS MATERIALS
On-site groundwater testing detected a trace Mitigation Measures                                                                            Less than significant
concentration of trichloroethene (TCE) in Gypsum
Canyon near the location of the former rocket fuel MM 10-1     Based on the Environmental Site Assessments performed for the project
test site and trace concentrations of gasoline and             site (included in Appendix J), it is not anticipated that any underground
NDMA.       Based on an Environmental Site                     storage tanks, septic systems, leach fields, or significant soil
                                                               contamination will be encountered during construction. In the event these
Characterization Report prepared that included a
human health risk assessment, implementation of                subsurface features or contaminated soil are encountered during site
the proposed project would not pose a threat to                grading, work shall immediately cease in the area and the property
human health due to residual hazardous                         owner/developer shall notify the Fire Department and Public Utilities,
substances associated with historical operations.              Environmental Services Division, and retain a qualified hazardous
                                                               materials engineer to assess the impacts and prepare a response plan
                                                               using risk-based cleanup standards applicable to residential land use.
                                                               Upon approval of the response plan by the Fire Department or other
                                                               agency, as applicable, the engineer shall obtain any required permits,
                                                               oversee the removal of such features and/or conduct the response work
                                                               to the satisfaction of the Fire Department or other agency, as applicable,
                                                               until closure status is attained.
Relocation of the Questar Southern Trails Pipeline MM 10-1 and                                                                              Less than significant
would be accomplished in accordance with
appropriate design and safety standards, and the Mitigation Measures
project does not include any uses that would MM 10-2           Prior to approval of grading plans within an area in which the Southern
involve the use, transport, disposal or emission of            Trails Pipeline is located or is proposed to be relocated within the grading
hazardous materials. Therefore, project residents              plan boundaries, the property owner/developer shall obtain the approval
would not be exposed to a significant hazard due to            of the Questar Pipeline Company. Written evidence of this approval shall
a foreseeable upset or accident condition.                     be submitted to the Department of Public Works.




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                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                                                    Level of Significance
          Environmental Impact Analysis                                                               Mitigation Program                                              After Mitigation
                                                                      MM 10-3    Prior to approval of any grading plans within a development area wherein
                                                                                 the Southern Trails Pipeline exists or is proposed to be relocated, the
                                                                                 property owner/developer shall submit a safety plan to the Fire
                                                                                 Department.      If there are any environmental concerns relating to
                                                                                 developing adjacent to the pipeline or relocating it identified during
                                                                                 subsequent reviews, the property owner/developer shall be responsible
                                                                                 for financing/implementing any necessary mitigation measures. The
                                                                                 safety plan shall be reviewed by the Questar Pipeline Company and
                                                                                 approved by the Fire Department. Relocation of the pipeline shall occur
                                                                                 at no cost to the City.
                                                              Prior to issuance of building permits, the property owner/developer shall
                                                                      MM 10-4
                                                              provide written evidence to the Public Utilities Department that the
                                                              relocated Southern Trails Pipeline has been inspected and approved by
                                                              the California Public Utilities Commission (CPUC).
The project would involve developing residential Project Design Features                                                                     Less than significant
structures within and adjacent to high fire hazard
areas; fire emanating from the project site or PDF 10-1       Prior to the approval of the first tentative tract or parcel map, the property
surrounding undeveloped areas could spread to                 owner/developer shall enter into an agreement (Fire Protection
                                                              Agreement) with the City of Anaheim. This agreement shall specify the
developed areas of the project, threatening the
health and safety of residents.                               property owner/developer’s pro-rata fair share funding of capital
                                                              improvements necessary to establish adequate fire protection facilities
                                                              and equipment to service the proposed development.
                                                                                 The property owner/developer shall be responsible for paying fees or
                                                                                 otherwise providing for the design, construction and furnishing of the fire
                                                                                 station, including all fire apparatus necessary to fully equip the fire station
                                                                                 per the City’s specifications, to adequately serve the project. The
                                                                                 property owner/developer shall also be responsible for dedicating a parcel
                                                                                 for development of the fire station in the location specified in Exhibit 3-4
                                                                                 (Development Plan).
                                                                                 The fire station facility shall be constructed and operational prior to the
                                                                                 issuance of the first building permit for any development area east of the
                                                                                 SR-241, or as otherwise required by the Fire Department in the Fire
                                                                                 Protection Agreement.
                                                                      PDF 10-2   Prior to submittal of the first tentative tract or parcel map or approval of
                                                                                 the first grading plan, whichever occurs first, the property owner/developer
                                                                                 shall submit a final Fire Master Plan (FMP) to the Fire Department for
                                                                                 review and approval to ensure that fire protection for each Development
                                                                                 Area is in accordance with Fire Department requirements. The final FMP

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                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                                               Level of Significance
          Environmental Impact Analysis                                                               Mitigation Program                                         After Mitigation
                                                                                 shall be in substantial conformance with the preliminary FMP (Appendix R
                                                                                 of the EIR). A copy of the approved Fire Master Plan shall be submitted
                                                                                 to the following City Departments: Planning, Police and Public Works.
                                                         The Mountain Park Specific Plan includes conceptual fuel modification
                                                                      PDF 10-3
                                                         strategies. Prior to submittal of each tentative tract or parcel map or
                                                         grading plan, whichever occurs first, fuel modification plans shall be
                                                         submitted to the Fire Department for review and approval. The fuel
                                                         modification plan shall be prepared in accordance with the provisions of
                                                         the California Fire Code in effect at the time of submittal of the tentative
                                                         tract or parcel map and be based upon the criteria set forth in the City of
                                                         Anaheim Fire Department Fuel Modification Plan Guidelines. Prior to final
                                                         Certificate of Occupancy for the first building in each Development Area
                                                         fuel modification zones shall be installed and inspected in substantial
                                                         conformance with the approved plans to the satisfaction of the Fire
                                                         Department.
The project would be consistent with relevant PDFs and MMs above apply                                                                No impact
hazards and hazardous materials-related goals and
policies of the City of Anaheim and SCAG.
Off-site Project Feature Impacts
Off-site roadway and drainage improvements would MM 10-1                                                                                                    Less than significant
not result in impacts related to hazards and
hazardous materials.
Caltrans-related Project Feature Impacts
Project features within Caltrans right-of-way would MM 10-1                                                                                                 Less than significant
not result in impacts related to hazards and
hazardous materials. The SR-241/Weir Canyon
Road interchange and Mountain Park Drive bridge
overcrossing would improve emergency access.
SECTION 4.11 – POPULATION AND HOUSING
The proposed project is consistent with the current No mitigation is required                                                                               No impact
demographic projections assumed in the City of
Anaheim General Plan Update and would not
induce substantial population growth in the area,
either directly or indirectly.
The project would be consistent with relevant No mitigation is required                                                                                     No impact
population and housing-related goals and policies
of the City of Anaheim and SCAG.
Off-site and Caltrans-related project features would not generate or otherwise affect population and housing in the project area.

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                                                                             TABLE 1-1 (Continued)
                                                                      SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                           AND MITIGATION PROGRAM

                                                                                                                                                    Level of Significance
      Environmental Impact Analysis                                                     Mitigation Program                                            After Mitigation
SECTION 4.12 – PUBLIC SERVICES AND UTILITIES
4.12.1 − Fire Protection Services
The proposed project would convert currently PDF 10-1, PDF 10-2, and PDF 10-3 in Section 4.10, Hazards and Hazardous Materials Less than significant
undeveloped land in a hillside area to primarily
residential land uses, and would increase the Existing Regulations and Standard Conditions
demand for fire protection services provided by the SC 12-1 Prior to approval of each tentative tract or parcel map, the property
City of Anaheim. The proposed project involves the          owner/developer shall demonstrate that the map has been prepared in
construction of a fire station and the potential            compliance with applicable provisions of the Anaheim Municipal Code and
impacts of this have been addressed in the analysis         the Mountain Park Specific Plan relevant to fire prevention and
for the project presented in Section 4 of this EIR.         suppression, subject to the review and approval of the Fire Department.
4.12.2 − Police Services
The introduction of a residential development on the Existing Regulations and Standard Conditions                                                Less than significant
project site and associated increase in population
would increase the demand for police protection SC 12-2           Prior to issuance of the first building permit for each building with attached
services provided by the City of Anaheim.                         units, or prior to issuance of a building permit for each detached building,
                                                                  the property owner/developer shall pay the Police Facilities Capital
                                                                  Improvement Fee in effect at the time of issuance of the building permit;
                                                                  or, if the fee has not been adopted at the time of issuance of the first
                                                                  building permit, the payment of an amount estimated by the City of
                                                                  Anaheim Police Department to be the approximate fair share attributable
                                                                  to the project for police services.
4.12.3 − Schools
The development of 2,500 residential units on the Project Design Features                                                                        Less than significant
project site would result in the generation of
approximately 1,045 additional students in the PDF 12-1
                                                                  Prior to the approval of the first tentative tract or parcel map in
Orange Unified School District. The students would                Development Area 3, the map shall provide for a minimum 10-acre site
attend existing schools serving the project site as               reserved for the purchase and construction of an elementary school by
well as an elementary school to be developed by                   the Orange Unified School District. The property owner/developer shall
the School District on the site provided for in the               provide the Planning Department with adequate proof that, in defining the
Specific Plan. The potential impacts associated                   boundaries of the school site area, the property owner/developer has
with implementation of a school have been                         complied with the provisions of the School Impact Mitigation Agreement
addressed throughout the analysis included in                     (Appendix J) dated December 16, 2004 between Irvine Community
                                                                  Development Company and the Orange Unified School District, or any
Section 4 of this EIR, including traffic, demand on
public services and utilities, etc.                               subsequent agreement entered into between the property
                                                                  owner/developer and the Orange Unified School District.




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                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                                                   Level of Significance
          Environmental Impact Analysis                                                               Mitigation Program                                             After Mitigation
                                                                      Existing Regulations and Standard Conditions
                                                                      SC 12-3     The property owner/developer has entered into a School Impact Mitigation
                                                                                  Agreement (Appendix K) with the Orange Unified School District in order
                                                                                  to mitigate impacts to the school district associated with the Mountain
                                                                                  Park development. This Mitigation Agreement fully mitigates any impacts
                                                                                  to the school district in compliance with SB 50. Evidence that this
                                                                                  agreement has been executed shall be submitted to the Planning
                                                                                  Department prior to the issuance of the first building permit, or fees shall
                                                                                  be paid in compliance with SB 50, prior to the issuance of each building
                                                                                  permit.
4.12.4 − Water
On-site Project Feature Impacts                                       Project Design Features
The proposed project would generate an average PDF 12-2                           The Mountain Park Specific Plan includes a Water System Sub Area Less than significant
day water demand for residential and non-                                         Master Plan (SAMP) (refer to Exhibit 3-11). Prior to approval of each
residential uses (school, fire station, and trail                                 tentative tract or parcel map, the property owner/developer shall submit
staging area) of approximately 1.38 million gallons                               water improvement plans prepared in conformance with the SAMP to the
per day (MGD) and irrigation water demand of 0.54                                 Public Utilities Department for review and approval. The property
MGD, with a total demand of 1.92 MGD. The Water                                   owner/developer shall extend and construct the necessary water lines,
Supply Assessment prepared for the project                                        pump stations, and reservoirs to serve development phases prior to
concluded that there is sufficient available water                                connecting to the City’s water system.
supply for the proposed project for the next 20
years, including during drought conditions. The PDF 12-3                          Irrigation systems within the Mountain Park Specific Plan area shall be
physical impacts of constructing facilities on-                                   controlled by automatic programmable irrigation controllers that utilize
sitehave been addressed in the analysis for the                                   California Irrigation Management System (CIMS) Data to adjust water
proposed project.                                                                 times and durations based on daily evapotranspiration) data. Prior to
                                                                                  approval of landscape plans, the property owner/developer shall provide
                                                                                  verification in the form of notes on the plans to the Public Utilities
                                                                                  Department, Water Engineering Division, that the irrigation system is in
                                                                                  conformance with the system identified in the SAMP. Public Utilities
                                                                                  Department shall confirm that it is in conformance with the irrigation
                                                                                  system identified in the SAMP. Community wide irrigation control shall be
                                                                                  provided by a centralized irrigation control system designed to separately
                                                                                  valve hydrozones based on plant water requirements, exposure and
                                                                                  terrain characteristics. All systems shall utilize matched precipitation rate
                                                                                  nozzles and emitters for precise water application, adjustable low angle
                                                                                  nozzles to reduce overspray, check valves to reduce low head drainage,
                                                                                  and master valves to minimize water loss in the event of a line break or
                                                                                  valve malfunction.


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                                                                           TABLE 1-1 (Continued)
                                                                    SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                         AND MITIGATION PROGRAM

                                                                                                                                                               Level of Significance
     Environmental Impact Analysis                                                               Mitigation Program                                              After Mitigation
                                                                 Existing Regulations and Standard Conditions
                                                                 SC 12-4     In accordance with the requirements of SB 221, prior to approval of
                                                                             tentative tract or parcel, the property owner/developer shall request that
                                                                             the Public Utilities Department provide water verification studies
                                                                             confirming that sufficient water supply is available for the proposed uses,
                                                                             in compliance with the approved Water Supply Assessment prepared for
                                                                             the project.
                                                                 SC 12-5     Prior to final building and zoning inspections, the property owner/
                                                                             developer shall demonstrate to the Public Utilities Department that water
                                                                             consumption reduction measures have been implemented as required by
                                                                             State law in accordance with the Water Utilities Rates, Rules and
                                                                             Regulations. Where appropriate, plans submitted for building permits
                                                                             shall include notes on plans that indicate the measures that will be utilized
                                                                             to reduce water consumption. Such measures where feasible and
                                                                             appropriate shall include, but are not limited to:
                                                                                      a.   Low-flush toilets and urinals (Health and Safety Code
                                                                                           Section 17921.3);
                                                                                      b.   Maximum flow rate of all new showerheads, lavatory
                                                                                           faucets, and sink faucets (Title 20, California Code of
                                                                                           Regulations Section 1604[f]);
                                                                                      c.   Appliances certified by manufacturer to comply with
                                                                                           regulations established by applicable efficiency standards
                                                                                           (Title 20, California Code of Regulations Section 1606[b]);
                                                                                      d.   Public lavatories equipped with self-closing faucets that limit
                                                                                           the flow of hot water (Government Code Section 7800);
                                                                                      e.   Hot water pipes insulated to reduce water used before hot
                                                                                           water reaches equipment or fixtures (Title 24, California
                                                                                           Code of Regulations Section 2-5352[i] and [j]);
                                                                                      f.   Conservation reminders posted in rooms and restrooms;
                                                                                      g.   Thermostatically controlled mixing valve for bath/shower;
                                                                                      h.   Implementation of efficient irrigation systems to minimize
                                                                                           runoff and evaporation.




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                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                                                     Level of Significance
          Environmental Impact Analysis                                                                Mitigation Program                                              After Mitigation
                                                                      Mitigation Measures
                                                                      MM 12-1      Prior to the issuance of the first building permit, the property owner/
                                                                                   developer shall pay the Public Utilities Department a proportionate share
                                                                                   of a water supply source to meet the projected increases in water
                                                                                   demands in accordance with Rule 15.C, Section 3, of the Public Utilities
                                                                                   Rates, Rules, and Regulations. Although the Water Supply Assessment
                                                                                   (Appendix M of the Draft EIR No. 331) concludes that there is adequate
                                                                                   capacity to serve the proposed project, an additional water supply source
                                                                                   will ensure that there is no loss of redundancy and/or reliability to the city
                                                                                   water supply system.
                                                                      MM 12-3      Prior to approval of the first utility or infrastructure plan serving each
                                                                                   development area with impacts to public streets, the property
                                                                                   owner/developer shall submit a utility layout and trenching plan to the
                                                                                   Department of Public Works for all existing public streets. Trench
                                                                                   replacement shall, at a minimum, conform to Public Works Standard
                                                                                   Detail No. 132. Joint trenches shall be used whenever practicable. The
                                                                                   asphalt pavement restoration widths shall be approved by the Department
                                                                                   of Public Works based on anticipated impact of construction and layout of
                                                                                   trenches within the public right-of-way.
Off-site Project Feature Impacts                                      Mitigation Measure                                                                      Less than significant
The proposed project would involve the MM 12-2                   Prior to approval of street improvement plans, the property owner/
construction of a new water line in Santa Ana                    developer shall submit Traffic Management Plans to the City of Anaheim
Canyon Road. Additionally, a portion of an existing              Department of Public Works and Yorba Linda Public Works Department
City pipeline along this roadway would need to be                for proposed street improvements within the respective jurisdictions for
upsized to serve the project. There is sufficient                review and approval. The Traffic Management Plans shall describe traffic
capacity in water lines west of the project site to              control measures that shall be implemented to maintain traffic flow in all
serve the proposed project. Off-site water facility              directions where utility improvements are being implemented in existing
connections would require construction within                    roadways. Said traffic management measures shall be implemented on-
existing street right-of-way which would be                      going during road construction.
considered a temporary impact.
4.12.5 − Sanitary Sewer
On-site Project Feature Impacts                     Project Design Features
The proposed project would generate an average PDF 12-4                            The Public Facilities Plan provided in the Mountain Park Specific Plan Less than significant
daily wastewater flow of approximately 0.99 million                                includes a Project Sewer Study that identifies the sanitary sewer facilities
gallons per day (MGD) assuming the City of                                         to be constructed with the project. The project sanitary sewer system is
Anaheim generation factors, and 0.91 MGD                                           shown on Exhibits 3-12. The property owner/developer shall conduct
assuming the Orange County Sanitation District                                     sewer monitoring at two similar developments within the City to collect 14


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                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                                                    Level of Significance
          Environmental Impact Analysis                                                               Mitigation Program                                              After Mitigation
(OCSD) generation factors. The on-site collection                                 days of data during dry weather conditions to verify the sewage
systems would be constructed to accommodate the                                   generation rates. The property owner/developer shall then prepare a
anticipated sanitary sewer wastewater flow. The                                   report based on the City approved sewer modeling software to verify that
physical impacts of constructing facilities on-site                               the sewer sizes conform to those proposed in the project sewer study.
have been addressed in the analysis for the                                       Prior to approval of the sewer improvement plans, the property
proposed project.                                                                 owner/developer shall submit plans to the Department of Public Works,
                                                                                  demonstrating that the sanitary sewer system is in conformance with the
                                                                                  alternatives described in the Project Sewer Study included in the
                                                                                  Mountain Park Specific Plan. The property owner/developer shall extend
                                                                                  and construct the necessary facilities, including sanitary sewer lines to
                                                                                  serve the project development phases.
                                                                      Existing Regulations and Standard Conditions
                                                                      SC 12-6     Prior to issuance of each building permit, the property owner/developer
                                                                                  shall pay fees for sewer service to the City of Anaheim and Orange
                                                                                  County Sanitation District.
                                                                      SC 12-7     Prior to approval of final tract or parcel maps, the property owner/
                                                                                  developer shall pay the appropriate sewer connection fee to the City of
                                                                                  Anaheim, as established by City Council Resolution.
                                                                      Mitigation Measures
                                                                      MM 12-5     Prior to approval of the first final tract or parcel map in Development
                                                                                  Areas 3 and 7, the property owner/developer shall submit sewer
                                                                                  improvement plans for the West Basin sewer alignment from the
                                                                                  alternatives presented in the Project Sewer Study. The Department of
                                                                                  Public Works shall select the West Basin sewer alignment based upon the
                                                                                  ability of the property owner/developer to obtain off-site easements, and
                                                                                  any design limitations related to the SR-241 over-crossing and/or other
                                                                                  construction related issues.
                                                                      MM 12-6     Prior to the first final tract or parcel map in Development Areas 1, 2, 4, 5,
                                                                                  and 6, the property owner/developer shall submit sewer improvement
                                                                                  plans for the East Basin sewer alignment from the alternative presented in
                                                                                  the Project Sewer Study. The Department of Public Works shall select
                                                                                  the East Basin sewer alignment based upon the status of the Santa Ana
                                                                                  River Interceptor (SARI) relocation project.




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                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                                                           Level of Significance
          Environmental Impact Analysis                                                                  Mitigation Program                                                  After Mitigation
Off-site Project Feature Impacts
For the west basin off-site sewer connection option,                  MM 12-2, MM 12-5, and MM 12-6                                                                     Less than significant
approximately 200 feet of pipeline in Running
Springs Drive would require upsizing to a 10-inch
pipe diameter. All other existing sanitary sewer
pipelines in the Summit Community have the
available capacity to receive west basin
(Development Areas 3 and 7) wastewater flows
from the project site. Off-site sanitary sewer facility
connections would require construction within
existing street right-of-way which would be
considered a temporary impact.
The proposed Santa Ana River Interceptor (SARI)                       MM 12-2 and                                                                                       Less than significant
line connection for the east basin sanitary sewer
facilities would traverse privately-owned property                    Mitigation Measures
including a commercial parking lot within SAVI                        MM 12-4       Prior to approval of the first final tract or parcel map in Development
Ranch in the City of Yorba Linda. Off-site sewer                                    Areas 1, 2, 4 or 5, the property owner/developer shall obtain approvals,
facility connections would require construction                                     permits, and/or easement rights of way from private property owners and
within existing street right-of-way which would be a                                affected jurisdictions (City of Yorba Linda, Caltrans, Orange County
temporary impact.                                                                   Sanitation District) for off-site sanitary sewer line connections. Evidence
The project applicant would obtain appropriate                                      that these approvals and permits have been obtained shall be submitted
permits and authorization from affected property                                    to the Department of Public Works.
owners and jurisdictions.
4.12.4 − Electricity
On-site Project Feature Impacts                  Project Design Features                                                                                                Less than significant
The proposed project would generate an increased PDF 12-5                           The Public Facilities Plan provided in the Mountain Park Specific Plan
demand for electricity provided by the Anaheim                                      identifies the electrical facilities to be constructed with the project. The
Public Utilities Department and would require the                                   project electric system is shown on Exhibit 3-13. Prior to approval of
construction of new electric facilities within the                                  permits for improvement plans, the property owner/developer shall submit
project site. The physical impacts of constructing                                  electric system plans to the Public Utilities Department, Electrical
facilities have been addressed in analysis for the                                  Engineering Division, demonstrating that the electric system is in
proposed project.                                                                   conformance with the Public Facilities Plan included in the Mountain Park
                                                                                    Specific Plan. The property owner/developer shall extend and construct
                                                                                    the necessary facilities, including electric lines identified in Exhibit 3-13, to
                                                                                    serve development phases.




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                                                                           TABLE 1-1 (Continued)
                                                                    SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                         AND MITIGATION PROGRAM

                                                                                                                                                              Level of Significance
     Environmental Impact Analysis                                                               Mitigation Program                                             After Mitigation
                                                                 Existing Regulations and Standard Conditions
                                                                 SC 12-8     Prior to approval of final tract or parcel maps, the property
                                                                             owner/developer shall install, bond for, or otherwise secure on-site
                                                                             electrical facilities in accordance with the City of Anaheim Public Utility
                                                                             Electric Rates, Rules and Regulations, and provide written evidence of
                                                                             this fact to the Public Utilities Department.
                                                                 SC 12-9     The proposed project shall comply with all State Energy Insulation
                                                                             Standards and City of Anaheim codes in effect at the time of application
                                                                             for building permits. (Commonly referred to as Title 24, these standards
                                                                             are updated periodically to allow consideration and possible incorporation
                                                                             of new energy efficiency technologies and methods. Title 24 covers the
                                                                             use of energy efficient building standards, including ventilation, insulation
                                                                             and construction and the use of energy saving appliances, conditioning
                                                                             systems, water heating, and lighting.)       Plans submitted for building
                                                                             permits shall include written notes demonstrating compliance with energy
                                                                             standards and shall be reviewed and approved by the Public Utilities
                                                                             Department prior to issuance of building permits.
                                                                 SC 12-10    Prior to issuance of the first building permit for each tentative tract or
                                                                             parcel map, the property owner/developer shall pay fees in accordance
                                                                             with Anaheim’s Electric Rates, Rules and Regulations for electrical
                                                                             residential and commercial services for specific uses within the
                                                                             development site.
                                                                 SC 12-11    Prior to issuance of each building permit, the property owner/developer
                                                                             shall incorporate the following energy saving practices into building plans.
                                                                             The property owner/developer shall implement, to the extent feasible,
                                                                             these energy saving practices, in compliance with Title 10 of the Anaheim
                                                                             Municipal Code, prior to each final building and zoning inspection::
                                                                             a.   Consultation with the Public Utilities Department energy conservation
                                                                                  experts for assistance with energy conservation design features.
                                                                             b.   Use of electric motors designed to conserve energy.
                                                                             c.   Use of special lighting fixtures such as motion sensing light switch
                                                                                  devices and compact fluorescent fixtures in place of incandescent
                                                                                  lights.
                                                                             d.   Use of T8 lamps and electronic ballasts.        Metal halide or high-
                                                                                  pressure sodium for outdoor lighting.


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                                                                           TABLE 1-1 (Continued)
                                                                    SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                         AND MITIGATION PROGRAM

                                                                                                                                                                Level of Significance
     Environmental Impact Analysis                                                                Mitigation Program                                              After Mitigation
                                                                 Mitigation Measures
                                                                 MM 12-8     Prior to approval of grading plans, final tract or parcel maps, or street
                                                                             improvement plans, whichever occurs first, for Development Areas 3 and
                                                                             7, the property owner/developer shall submit preliminary electric system
                                                                             plans to the Public Utilities Department for review and approval. The
                                                                             property owner/developer shall request that the Public Utilities
                                                                             Department provide engineering standards and plans for the installation of
                                                                             electrical and communication conduit and substructures systems. The
                                                                             property owner/developer shall also submit an electrical and
                                                                             communications conduit phasing plan to the Public Utilities Department to
                                                                             assist in the planning of additional electrical distribution systems from the
                                                                             Park Substation to, and within, Development Areas 3 and 7.
                                                                 MM 12-9     Prior to approval of grading plans, final tract or parcel maps, or street
                                                                             improvement plans, whichever occurs first, for development areas east of
                                                                             SR-241, the property owner/developer shall submit preliminary electric
                                                                             system plans to the Public Utilities Department for review and approval.
                                                                             The property owner/developer shall request that the Public Utilities
                                                                             Department provide engineering standards and plans for the installation of
                                                                             electrical and communication conduit and substructures systems from the
                                                                             Park Substation to, and within, development areas east of SR-241.
                                                                 MM 12-10    Prior to issuance of the first building permit for each tentative tract or
                                                                             parcel map, the property owner/developer shall pay fees and provide the
                                                                             necessary infrastructure for the installation of the on-site and off-site
                                                                             electrical and communication systems to serve said tract, designed and
                                                                             phased to provide electrical service for the development areas within the
                                                                             project site. This shall include line extensions from the Park Substation to
                                                                             the development site. The applicable improvements shall be installed
                                                                             prior to the first final building and zoning inspection for the tract or parcel
                                                                             map.




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                                                                                TABLE 1-1 (Continued)
                                                                         SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                              AND MITIGATION PROGRAM

                                                                                                                                                                    Level of Significance
          Environmental Impact Analysis                                                               Mitigation Program                                               After Mitigation
Off-site Project Feature impacts                                      Mitigation Measures                                                                        Less than significant
New electric facilities would be constructed off-site MM 12-7                     Prior to approval of street improvement plans, the property
to connect the proposed development areas to                                      owner/developer shall submit Traffic Management Plans to the
existing facilities, including duct bank routing and                              Department of Public Works describing traffic control measures that shall
installation of new electric and telecommunication                                be implemented to maintain traffic flow in all directions where utility
circuits in Santa Ana Canyon Road. Additionally,                                  improvements are being implemented in existing roadways. The Traffic
1,600 feet of the existing SCE electric line that                                 Management Plans shall be reviewed and approved by the Department of
serves the quarry site would be undergrounded.                                    Public Works, Traffic Engineering Division.
Off-site electric facilities would require construction
within existing street right-of-way which would be
considered a temporary impact.
4.12.5 − Natural Gas
On-site Project Feature Impacts                         Project Design Features
The proposed project would generate an increased PDF 12-6                         The Public Facilities Plan provided in the Mountain Park Specific Plan Less than significant
demand for natural gas service provided by the                                    identifies the natural gas facilities to be constructed with the project. The
Southern California Gas Company and would                                         project natural gas system is shown on Exhibit 3-13. Prior to approval of
require the construction of new natural gas facilities                            grading plans, final tract or parcel maps, or street improvement plans,
within the project site. The physical impacts of                                  whichever occurs first, the property owner/developer shall submit plans to
constructing facilities have been addressed in                                    the Public Utilities Department demonstrating that the natural gas system
analysis for the proposed project.                                                is in conformance with the Public Facilities Plan included in the Mountain
                                                                                  Park Specific Plan. The property owner/developer shall extend and
                                                                                  construct the necessary facilities, including natural gas lines to serve
                                                                                  development phases.
                                                                      Existing Regulations and Standard Conditions
                                                                      SC 12-12    Prior to approval of final tract or parcel maps, the property
                                                                                  owner/developer shall install, bond for, or otherwise secure on-site natural
                                                                                  gas facilities in coordination with Southern California Gas Company
                                                                                  (SCG). Written evidence of this shall be provided to the Public Utilities
                                                                                  Department.
Off-site Project Feature impacts
New natural gas facilities would be constructed off- MM 12-7                                                                                                     Less than significant
site to connect the proposed development areas to
existing facilities. Off-site natural gas facilities
would require construction within existing street
right-of-way which would be considered a
temporary impact.

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                                                                            TABLE 1-1 (Continued)
                                                                     SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                          AND MITIGATION PROGRAM

                                                                                                                           Level of Significance
         Environmental Impact Analysis                                                Mitigation Program                     After Mitigation
4.12.6 − Telephone Service
On-site Project Feature Impacts
The proposed project would generate an increased No mitigation is required                                              Less than significant
demand for telephone service provided by SBC and
would require the construction of new telephone
facilities within the project site.     The physical
impacts of constructing on-site facilities have been
addressed in the analysis for the proposed project.
Off-site Project Feature impacts
New telephone facilities would be constructed off- MM 12-7                                                              Less than significant
site to connect the proposed development areas to
existing facilities. Off-site telephone facilities would
require construction within existing street right-of-
way which would be considered a temporary
impact.
4.12.7 − Cable Television Service/Reception
On-site Project Feature Impacts
The proposed project would generate an increased No mitigation is required                                              Less than significant
demand for cable television service and would
require the construction of new natural gas facilities
within the project site. The physical impacts of
constructing on-site facilities have been addressed
in analysis for the proposed project.
Off-site Project Feature impacts
New cable facilities would be constructed off-site to MM12-7                                                            Less than significant
connect the proposed development areas to
existing facilities. Off-site cable facilities would
require construction within existing street right-of-
way which would be considered a temporary
impact.




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                                                                             TABLE 1-1 (Continued)
                                                                      SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                           AND MITIGATION PROGRAM

                                                                                                                                       Level of Significance
         Environmental Impact Analysis                                         Mitigation Program                                         After Mitigation
4.12.8 – Solid Waste
The proposed project is estimated to generate Existing Regulations and Standard Conditions
4,287.8 tons of solid waste per year. There is
adequate capacity in the Orange County landfill SC 12-13   Prior to approval of any site plans, tentative tract or parcel maps, the Less than significant
system to accommodate the solid waste generated            property owner/developer shall submit a Solid Waste Management Plan
by the project.                                            with recycling capabilities to the Department of Public Works, Streets and
                                                           Sanitation Division for review and approval. Refuse collection and
                                                           disposal for the proposed project shall comply with AB 939, the County of
                                                           Orange Integrated Waste Management Plan, and the City of Anaheim
                                                           Integrated Waste Management Plan.
4.12.9 − Library Services
With its increase in population, the proposed project Existing Regulations and Standard Conditions
would increase the demand on the City’s libraries.
                                                      SC 12-14     Pursuant to Resolution No. 89R-235 adopting the Public Library Facilities Less than significant
                                                                   Plan for the East Santa Ana Canyon area, as may hereinafter be
                                                                   amended, the property owner/developer shall pay required fees for the
                                                                   construction of library facilities in the East Hills Planned Community.
                                                                   Fees shall be paid as a condition of approval of any final tract or parcel
                                                                   map, or prior to issuance of a building permit where no subdivision is
                                                                   involved.    The Planning Department, Building Division shall verify
                                                                   payment of fees.
SECTION 4.13 − RECREATION
The proposed project would increase the population Project Design Features
in the City of Anaheim and would increase the
demand for park and recreational facilities. The PDF 13-1          The Mountain Park Specific Plan includes the implementation of the Less than significant
                                                                   public Gypsum Canyon Creek Regional Riding and Hiking Trail (refer to
potential impacts associated with the proposed
public community park in Development Area 3 have                   Exhibit 3-8, Open Space, Trail and Bikeway Plan). Prior to approval of
been addressed in this EIR.                                        each tentative tract or parcel map that the trail is located within, the final
                                                                   alignment and final design for the Gypsum Canyon Creek Regional Riding
                                                                   and Hiking Trail shall be reviewed and approved by the Community
                                                                   Services Department and County of Orange Harbors, Beaches and Parks
                                                                   Department and shown on the tract or parcel map. Dedication of trail
                                                                   easements to the County of Orange shall occur concurrently with
                                                                   recordation of final tract or parcel maps. Trail improvements shall be
                                                                   completed prior to final building and zoning inspections for the first
                                                                   building within said tracts.




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                                                                               TABLE 1-1 (Continued)
                                                                        SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                             AND MITIGATION PROGRAM

                                                                                                                                                                Level of Significance
         Environmental Impact Analysis                                                                 Mitigation Program                                         After Mitigation
                                                                     PDF 13-2    The Mountain Park Specific Plan includes the implementation of Class II
                                                                                 bikeways (on-street, striped) along the following roadways: proposed
                                                                                 Mountain Park Drive; extension of Weir Canyon Road within the project
                                                                                 site; Gypsum Canyon Road from off-site Featherly Regional Park to on-
                                                                                 site Mountain Park Drive; and Santa Ana Canyon Road within the project
                                                                                 site (refer to Exhibit 3-8, Open Space, Trail and Bikeway Plan). Prior to
                                                                                 approval of each tentative tract or parcel map that includes these
                                                                                 bikeways; the property owner/developer shall include provisions for these
                                                                                 bikeways on the tract or parcel map. The final alignment and final design
                                                                                 of each bikeway shall be shown on the street improvement plans and
                                                                                 shall be reviewed and approved by the Department of Public Works.
                                                                     Existing Standard Conditions and Regulations
                                                                     SC 13-1     The Mountain Park Specific Plan includes an approximate 15-acre
                                                                                 improved park in Development Area 3 (refer to Exhibit 3-4) to fulfill the
                                                                                 City’s park dedication requirement. Prior to, or concurrent with, approval
                                                                                 of final tract or parcel maps in Development Area 3, the property
                                                                                 owner/developer shall demonstrate compliance with this park dedication
                                                                                 requirement to the Planning Department.
SECTION 4.14 − CULTURAL RESOURCES
On-site and off-site grading and excavation Mitigation Measures
activities could impact unknown archaeological
resources. (Impact 4.14-1)                     MM 14-1   Prior to the approval of a grading plan or issuance of a building permit, Less than significant
                                                         whichever occurs first, the property owner/developer shall retain a
                                                         County-certified archaeologist (project archaeologist) and submit written
                                                         confirmation of this to the Department of Public Works. The project
                                                         archaeologist shall observe grading activities and recover, catalogue,
                                                         analyze, and report archaeological resources as necessary in the
                                                         previously undeveloped portions of the development area. The project
                                                         archaeologist shall be present at the pre-grade conference. The project
                                                         archaeologist shall submit to the Planning Department, and Department of
                                                         Public Works, Development Service Division, a written plan with
                                                         procedures for archaeological resource monitoring. For work within
                                                         Caltrans right-of-way the plan shall be submitted for review by Caltrans
                                                         Cultural Resources staff.       This plan shall include procedures for
                                                         temporarily halting or redirecting work to permit the sampling,
                                                         identification, and evaluation of the resources as appropriate. If the
                                                         archaeological resources are found to be significant, the project
                                                         archaeologist shall determine appropriate actions—in cooperation with the
                                                         City of Anaheim or Caltrans, if within Caltrans right-of-way—for


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                                                                              TABLE 1-1 (Continued)
                                                                       SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                            AND MITIGATION PROGRAM

                                                                                                                                                                Level of Significance
         Environmental Impact Analysis                                                              Mitigation Program                                            After Mitigation
                                                                               exploration and/or data recovery. The project archaeologists shall
                                                                               prepare any excavated material to the point of identification. Following
                                                                               the completion of grading, the archaeologists shall prepare a report
                                                                               detailing the results of the monitoring program to be presented to the City
                                                                               of Anaheim Planning Department. The report shall follow guidelines of
                                                                               the California Office of Historic Preservation (1990). Excavated finds shall
                                                                               be offered for curatorial purposes to a qualified scientific institution.
                                                                     MM 14-2   If human remains are encountered during the conduct of ground-
                                                                               disturbing activities, State Health and Safety Code Section 7050.5 states
                                                                               that no further disturbance shall occur until the County Coroner has made
                                                                               a determination of origin and disposition of the materials pursuant to
                                                                               Public Resources Code Section 5097.98. The County Coroner must be
                                                                               notified of the find immediately. If the remains are determined to be
                                                                               prehistoric, the Coroner would notify the Native American Heritage
                                                                               Commission (NAHC). The NAHC would determine and notify a Most
                                                                               Likely Descendent (MLD). The MLD may inspect the site of the discovery
                                                                               with the permission of the property owner/developer or his/her authorized
                                                                               representative. The descendent must complete the inspection within 24
                                                                               hours of notification by the NAHC. The MLD may recommend scientific
                                                                               removal and nondestructive analysis of human remains and items
                                                                               associated with Native American burials.
On-site and off-site grading and excavation MM 14-3                            Prior to issuance of the first grading permit, the property owner/developer Less than significant
activities could impact unknown paleontological                                shall submit a monitoring plan, prepared by an Orange County certified
resources. (Impact 4.14-2)                                                     paleontologist to the Department of Public Works, Development Services
                                                                               Division that ensures that the following actions are implemented:
                                                                               a.    The area west of Gypsum Canyon is comprised almost entirely of
                                                                                     the Topanga Formation (high paleontological sensitivity) and
                                                                                     contains all of the heretofore recognized surface occurrences of
                                                                                     fossils on the project site. The north-central portion of the project
                                                                                     site is comprised chiefly of the interbedded undifferentiated
                                                                                     Vaqueros and Sespe Formations (moderate to high paleontological
                                                                                     sensitivity) and smaller elements of the Sespe, Santiago, and
                                                                                     Topanga Formations (all high paleontological sensitivity).
                                                                                     Paleontological monitoring in the western and north-central areas
                                                                                     of the project site shall be conducted on a full-time basis and shall
                                                                                     be identified as such in the monitoring plan. It shall be the
                                                                                     responsibility of the project paleontologist to show, to the
                                                                                     satisfaction of the City, the recommended limits of full-time
                                                                                     monitoring on the tentative tract or parcel map level grading plans,

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                                                                        TABLE 1-1 (Continued)
                                                                 SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                      AND MITIGATION PROGRAM

                                                                                                                                                       Level of Significance
     Environmental Impact Analysis                                                      Mitigation Program                                               After Mitigation
                                                                           when available. Because of the potential for identifying microfossils
                                                                           or small fragments of macrofossils, periodic screening of sediments
                                                                           from cuts in these formations shall be carried out by the project
                                                                           paleontologist. Such material may be removed in bulk and
                                                                           screened off-site to minimize interference with grading operations.
                                                                      b.   The Holz Shale, Schulz Ranch Member of the Williams Formation,
                                                                           the Silverado Formation, Santiago Formation, and the Sespe
                                                                           Formation, exposed primary east of Gypsum Canyon, shall be
                                                                           monitored as determined necessary by the project paleontologist
                                                                           during grading operations. Recommended hours for monitoring
                                                                           activities shall be established by the project paleontologist and
                                                                           shall be outlined in the monitoring plan. It shall be the responsibility
                                                                           of the project paleontologist to demonstrate, to the satisfaction of
                                                                           the City, the appropriate level of monitoring necessary based on
                                                                           the tentative tract or parcel map level grading plans, when
                                                                           available. Because of the potential for identifying microfossils or
                                                                           small fragments of macrofossils, periodic screening of sands from
                                                                           cuts in these units shall be done by the project paleontologist
                                                                           monitor. Such material may be removed in bulk and screened off-
                                                                           site to minimize interference with grading operations.
                                                                      c.   Any paleontological work at the site shall be conducted under the
                                                                           direction of a County of Orange Certified paleontologist (project
                                                                           paleontologist).
                                                                      d.   If a fossil discovery occurs during grading operations when the
                                                                           project paleontologist is not present, grading shall be diverted
                                                                           around the area until the monitor can survey the area, and/or
                                                                           Caltrans Cultural Resources staff can inspect the site, if the
                                                                           resources are found within Caltrans right-of-way.
                                                                      e.   Any fossils recovered during the development, along with their
                                                                           contextual stratigraphic data, shall be donated to the County of
                                                                           Orange, or other appropriate institution with an educational and
                                                                           research interest in the materials. A final report detailing findings
                                                                           and disposition of specimens shall be prepared by the project
                                                                           paleontologist and submitted to the City of Anaheim Planning
                                                                           Department upon completion of grading.




R:\Projects\TIC\J020\Draft EIR\1 Exec Summary Table-032305.doc                       1-74                                                                 Executive Summary
                                                                                                           Mountain Park Specific Plan Amendment
                                                                                                                                 Draft EIR No. 331

                                                                            TABLE 1-1 (Continued)
                                                                     SUMMARY OF ENVIRONMENTAL IMPACTS
                                                                          AND MITIGATION PROGRAM

                                                                                                                           Level of Significance
          Environmental Impact Analysis                                               Mitigation Program                      After Mitigation
On-site and off-site grading and excavation MMs 14-1 and 14-2                                                           Less than significant
activities could impact previously unidentified
human remains, including those interred outside of
formal cemeteries. (Impact 4.14-3)
The project would be consistent with relevant No mitigation is required                                                 No impact
cultural resource-related goals and policies.




    R:\Projects\TIC\J020\Draft EIR\1 Exec Summary Table-032305.doc                 1-75                                       Executive Summary

				
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