Schroeder WQSC April 2007

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Schroeder WQSC April 2007 Powered By Docstoc
					Water Quality Standards
303(d) List
Total Maximum Daily Loads

Phil Schroeder
Water Protection Program
Missouri Department of Natural Resources
Water Quality Based Process

  Set goals and WQS      Conduct monitoring

Develop and Implement
 strategies to restore
     water quality         Meeting WQS?

  Prepare 303(d) List    No           Yes
Water Quality
Goal of the Clean Water Act
• Section 101(a)
• Restore and maintain the chemical,
  physical, and biological integrity of the
  Nation’s waters
• Wherever attainable, provide for protection
  and propagation of fish, shellfish, and
  wildlife and provide for recreation in and on
  the water (“fishable / swimmable”)
    Water Quality Standards
•   Specific (Numeric) Criteria
•   General (Narrative) Criteria
•   Antidegradation Policy and Procedure
•   Water Classification and Use Designations
    Water Classification
• Lakes (455 - 293,257.8 acres)
  L1 - Primarily Used for Drinking Water Supply
  L2 - Major Reservoirs
  L3 - Other Lakes
• Streams (3761 - 22,231.2 miles)
  P - Permanent Flow
  P1 - Standing Water Reaches of Class P Streams
  C - Intermittent Flow
• Wetlands - Class W
• Unclassified Waters - Class U
          Use Designations
•   Aquatic Life         • Industrial Process
•   Swimming               Water
•   Boating              • Historic Preservation
•   Livestock Watering   • Hydrologic Cycle
•   Irrigation             Maintenance
•   Fish Consumption     • Educational/Scientific
•   Drinking Water
 Use Attainability Analysis
   Use Assessment Criteria - 131.10(g):
1 - Naturally Occurring Pollutant Concentrations
2 - Insufficient Flow
3 - Non-Remedial Human Caused Conditions
4 - Hydrologic Modifications
5 - Natural Physical Conditions
6 - Remedy Causes Socio-Economic Hardship
More on Use Designation
• Attainable Use

• Existing Use

• Designated Use

• Presumed Use
    Specific Criteria
      10 CSR 20-7.031(4)

Table A - Numeric Criteria
Table B1 - Acute Ammonia
Tables B2 and B3 - Chronic Ammonia
New Table ( K)? - Site-Specific Criteria
            Other Tables
Table C - Streams Cold Water Sport Fishery
Table D - Outstanding State Resource Waters
Table E - Outstanding National Resource Waters
Table F - Metropolitan No-Discharge Streams
Table G - Lake Classifications and Use Designations
Table H - Stream Classifications and Use Designations
Table I - Biocriteria Reference Streams
Table J - Losing Streams
                  General Criteria
                         10 CSR 20-7.031(3)
<x)))))<           <x)))))<       <x)))))<   <x)))))<   <x)))))<

• Narrative Criteria
• Prohibits Any Observable Impairment to
  Beneficial Uses
• Applies to All Waters of the State
   -o))))<   oo   oo   oo o   o   o
Discharging additional pollutants to Waters
of the State is prohibited unless specific
conditions are demonstrated.
  Tiers of Antidegradation
           10 CSR 20-7.031(2)

Tier 1- Water quality is at, near or below WQS
Tier 2 - Water quality is better than WQS and
  degradation is allowed when justified
Tier 3 - Outstanding National and State
  Resource Waters. No degradation allowed.
                 High Quality

Existing Water
                               Available Assimilative
Water Quality

Beneficial Use

                 Low Quality
 Antidegradation Review
• Alternatives Analysis
• Demonstrated Social and Economic
• Highest Regulatory Requirements are met
• Approved Watershed Management Plans
  for Nonpoint Sources are implemented
• Public Participation
• Required of all state programs
• Final draft of Missouri’s procedure to be
  presented to the Missouri Clean Water
  Commission on April 20, 2007
• If approved, must be promulgated into rule
  and accepted by EPA
          303(d) List

 List of waters were regulatory actions have been
unsuccessful in addressing the control of pollutants
 to the extent necessary to prevent impairment of
               waters’ beneficial use.
          303(d) Listing
• Requires all data be considered
• Must be scientifically sound
• Impairments based on General Criteria must
  be quantified such that a targetable
  threshold exists for the TMDL
• Significant events on a water body may
  effect usability of data
303(d) List for 2004 / 2006
 • 74 Waters
   – down from 190 waters listed in 2002
      •   67 TMDLs completed
      •   45 have insufficient data
      •   19 required new data analysis
      •   11 have modified permits issued
      •   10 new water quality standard
      •   6 moved to category 3B (further data needed)
 • 32 waters from the 2002 303(d) List
 • 42 new listings
2004/2006 303(d) List
      Pollutants of Concern

 Dissolv ed
  Ox y gen             Metals

 The amount of a specific pollutant a waterbody
can receive and still meet Water Quality Standards
•   Targeted for waters on the 303(d) List
•   13-year Schedule for completion
•   EPA Priorities (Consent Decrees)
•   State Priorities
    – Certainty of impairment and source
    – Data collection needs
    – Grouped by region or pollutant type
         TMDL Elements
• Identify All (Total) Sources of Pollutant
• Calculate Maximum Pollutant Load
• Assign Daily Pollutant Load Allocations to
  Point Sources and Nonpoint Sources
• Address “Seasonality”
• Include “Margin of Safety” to Account for
     Key Factors in a TMDL
Source(s)             Pollutant / Condition
PS / NPS              WQS / Use Impairment

Criterion             Target Load
Numeric / General     WLA + LA

Margin of Safety      TMDL
Explicit / Implicit   WLA + LA +MOS
        TMDL Scenario
Source(s)                  Pollutant / Condition
NPS - Abandoned Mine Land Sulfates + Chlorides @
                          2000 mg/L
                          AQL Use Impairment
Water Quality Criterion Target Load
1000 mg/L                  1000 mg/L

Margin of Safety           TMDL
Explicit - 10 % of LC      900 mg/L
100 mg/L                   (900 x Flow x CF = #/day)
     Allocation Formula

    LC = (Qs + Qd) * WQC * CF

(0.1 cfs)(2 mg/L)(5.40) = 1.1 pounds per day
  Addressing Narrative Criteria
       Matching the Load Allocation to the WQ Standard

• Eutrophication
   – Chl-a (ug/L) linked to P or N (mg/L)
• Turbidity
   – Secchi Disk Depth (m) linked to TSS (mg/L)
• Sediments
   – Bottom Coverage (%) linked to TSS (mg/L)
• Discoloration
   – Color Match (amt. of color disparity using the
     Platinum Cobalt Visual Method) linked to Chem “X”
TMDL Progress
Calendar    TMDLs
 Year      Completed
  2000        14
  2001        10
  2002         4
  2003        35
  2004        18
  2005         6
  2006        44
             On the Internet...
         Department of Natural Resources 2006 TMDL Development Schedule
                    (Click on a heading below to sort the table.)
                                       Target Date
                                                       Target Date to
WBID   Water Body      Pollutant        for Public                            Comments
                                                       Submit to EPA
                                                                      Permit in Lieu of TMDL
                                                                      Submitted to EPA
3413                BOD, NH3N        2005/01/28        2006/02/23     Oak Grove WWTP -
                                                                      New permit issued
                                                                      Permit in lieu of TMDL.
                                                                      Approved on 2006/05/26
1339                BOD, VSS         2005/12/09        2006/04/05     El Dorado Springs WWTF
                                                                      - MO0040002 Issued 2006/

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