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Comming Attractions

Comming Attractions. At a watewater Treatment plant near you. Ammonia Temperature Neutrients. Clean Water Act. Goal Fishable Swimmable Classifications Aquatic life Recreation Water Supply Agriculture. Clean Water Act. Standards Physical & Biological Inorganic Organic Metals.

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Comming Attractions

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  1. Comming Attractions At a watewater Treatment plant near you Ammonia Temperature Neutrients

  2. Clean Water Act • Goal • Fishable • Swimmable • Classifications • Aquatic life • Recreation • Water Supply • Agriculture

  3. Clean Water Act • Standards • Physical & Biological • Inorganic • Organic • Metals

  4. Changes to Regulations • Triennial Review • Required by State & Federal Regs • Colorado Process 5 years • Required for; • Basic Standards • Stream Standards • Site Specific Standards • Other regulations

  5. Standards implementation New or revised EPA criteria Basic Stds Discharge Permit Stream Stds 2006 San Juan & Gunnison 2007 Arkansas & Rio Grande 2008 Colorado 2009 South Platte or ALL at once June 2005 Next = June 2010

  6. Basic Standards 2005 • New definitions • Effluent dependent stream • Effluent dominated stream • E.coli • Ambient Quality Based Stds. • Clarification (95th percentile) • Temporary Modifications • Clarification (Reg.31 & 61)

  7. Basic Standards 2005 cont. • Antidegradation Provisions • Use protected designation • Change methodology • Statewide Standards • Clarification of radionuclide analysis • Add Tributyltin (TBT) • Recreation Classification

  8. Basic Standards 2005 Cont. • Temperature Standards • Daily Maximum (“DM”) • Cold 23.8 C • Warm 32.5 C • Cool 29.4 C • Maximum weekly average Maximum temperature (“MWAT”) • Cold 19.3 C • Warm 29.2 C • 24.2 C

  9. Basic Standards 2005 cont. • Metals • Aluminum • Revise based on pH • Arsenic • Acknowledge MCL • Antimony • Eat more fish • Others-

  10. Basic Standards 2005 Cont. • Ammonia Standards • EPA’s 1999 criteria • New calculation • AMMTOX –vs- CAM • Total –vs- unionized • Early life stages

  11. Ammonia Impacts to POTWs • Cold Water Segments • Some relief, less stringent standards • OR Not = antidegradation • Warm Water segments • More stringent standards • Less ammonia in discharge • May require: • New facilities • Higher O&M costs • Higher Operator certification

  12. When Did this Happen? • The standards were NOT adopted on the usual basin-by-basin schedule: • San Juan/Gunnison in June 2006 • Remaining basins was implemented in one hearing in March 2007 • The WQCD has sent letters to all permittees with information on the planned implementation

  13. Who is likely to be impacted • POTWs • Warm water streams • Low dilution flows • Early life stages present

  14. Comparison of standards

  15. What are Your Options? • Let the Division set your limits based on default AMMTOX assumptions • Supply site-specific data on ELS and trout to modify the default assumptions • Run the AMMTOX model yourself using site-specific data • Accept the results, if they are okay • Ask the WQCC for a temporary modification for your segment at the March 2007 hearing if you need >5 years to upgrade your facility • Ask the WQCC for a site-specific ammonia standard at the March 2007 hearing

  16. What can you do ? • Be prepared • Collect data • Flow • Temperature • pH • Biology • ELS present ? • Seek professional help

  17. Basic Sampling Program • What • Stream: pH, temperature, time, ammonia (u/s) • Effluent: ph, temperature • When • Stream: biweekly or monthly • Effluent: individual samples (not DMR) • Where • Upstream • Downstream (equilibrium conditions) • Other • Variation in pH and temperature over day • Seepage and velocity

  18. Temperature Standards • Adopted January 2007 • Final approval February 12, 2007 • Implement in basin hearings • Postpone Arkansas & Rio Grande to 2012 • Interim standard • Effective July 2007

  19. Interim Temperature Stds. • Effective 7/1/07 until basin hearing • Cold water 1 & 2 • 20deg C (MWAT) • 18.2 deg C (MWAT) Gold Medal Fisheries • 17 deg C (MWAT) above 7,000ft • 1st through 3rd order streams • Warm water 1&2 • 30deg C (MWAT) • No Acute Standards

  20. Definitions • Daily Maximum Temperature (DM) • Highest 2hr average in 24hr period • Weekly Average Temperature • Mathematical mean of multiple,Equaly spaced, daily temperatures over a 7 day period. (3/day min.)

  21. Definitions cont. • Maximum Weekly Average Temp. (MWAT) • -largest mathematical mean of multiple equally spaced, daily temperatures over a 7 day period---

  22. Nutrient Criteria • Purpose • Prevent eutrophication from human sources • Excess algae growth • pH • D.O. • Appearance • Measured as chlorophyll a

  23. Nutrient Criteria cont. • Phosphorus = cause in most waters • EPA proposal • Define Ecoregion • Use 25th Percentile • Assumes, least productive= most desirable • Fishery management may justify Different #s

  24. Nutrient Criteria -3 • Many States developing own criteria • Colorado is • Lakes first • May need to be site specific • Control regulations may be model • Dillon Reservoir -7.4ug/l “P” • Cherry Creek Reservoir-15ug/l Chl-a • Chatfield Reservoir -27ug/l “P” • Bear Creek Reservoir –less green

  25. Nutrient Criteria -4 • Phosphorus removal • Biological • BNR • Chemical/ physical • Metal salts • Ferric chloride • Alum • Clarification • Filtration

  26. Spill Reporting • Colorado Water Quality Forum Work group • Reason for • Many different interpretations • What is reportable • Process • 10 meetings since 11/2006 • Results • CDPH&E WQCCD policy WQE-10

  27. Contaminants of EmergingConcern • Improvements in analytical methods Detect at very low levels • Parts per billion, parts per trillion • So what? • Current science has made few determinations of impacts • Compounds include • Antibiotics, Prescription Drugs, non prescription drugs,Sex & Steroidal hormones etc.,etc

  28. Contaminants of Emerging Concern-2 • Research needed • Health effects • Aquatic effects • Improved methods • Nonylphenol • State standard set • Delayed implementation date • No EPA approved method • Study underway • MWRD, Boulder, Littleton/Englewood/ Colorado Springs

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