1 / 40

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.

fathia
Télécharger la présentation

Comming Attractions

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  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

More Related