John A. DeLashmit, P.E.
USEPA Region 7
REGFORM Water Conference
September 5, 2013
The List
 Recreational Criteria Recommendations
 Ammonia Criteria Recommendations
 Proposed WQS Regulation Clarificatio...
Recreational Criteria
Recommendations
 Published in the Federal Register on November 29,
2012 (per Consent Decree and Set...
Recreational Criteria
Recommendations (cont.)
 Averaging interval should not be greater than 30 days
 Water body GM shou...
Recreational Criteria
Recommendations (cont.)
http://water.epa.gov/scitech/swguidance/standards/criteria/health/recreation/index.cfm
Ammonia Criteria
Recommendations
 Published in the Federal Register on August 22, 2013
 Supersedes recommended criteria ...
Criterion
Duration
1999
Criteria
2009
Draft
Updated
Criteria
2013
Final
Updated
Criteria
Acute (1-hour
average)
24 19 17
C...
http://water.epa.gov/scitech/swguidance/standards/criteria/aqlife/ammonia/index.cfm
Proposed WQS Regulation Changes
 Core of current rules in place since 1983
 Proposed rules were published in the Federal...
Proposed WQS Regulation Changes
(cont.)
 The Administrator’s determination update clarifies
what constitutes an Administr...
Proposed WQS Regulation Changes
(cont.)
 Antidegradation update clarifies that implementation
methods are to be adopted i...
http://yosemite.epa.gov/opei/rulegate.nsf/byRIN/2040-AF16
http://water.epa.gov/lawsregs/lawsguidance/wqs_index.cfm
That’s all,
folks!
John A. DeLashmit, P.E.
USEPA Region 7
11201 Renner Blvd.
Lenexa, KS 66219
(913)551-7821
delashmit.john...
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What's New in WQS by John DeLashmit, P.E., at REGFORM's 2013 Missouri Water Seminar, Sept. 5, 2013

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What's New in WQS by John DeLashmit, P.E., at REGFORM's 2013 Missouri Water Seminar, Sept. 5, 2013

  1. 1. John A. DeLashmit, P.E. USEPA Region 7 REGFORM Water Conference September 5, 2013
  2. 2. The List  Recreational Criteria Recommendations  Ammonia Criteria Recommendations  Proposed WQS Regulation Clarifications
  3. 3. Recreational Criteria Recommendations  Published in the Federal Register on November 29, 2012 (per Consent Decree and Settlement Agreement)  Two sets of recommended criteria; EPA will accept either from states and tribes  Criteria expressed as a geometric mean (GM) and a “statistical threshold value” (STV)  Freshwater may use E. coli or enterococci as indicator  Criteria are for primary contact recreation, known in MO as Whole Body Contact Recreation
  4. 4. Recreational Criteria Recommendations (cont.)  Averaging interval should not be greater than 30 days  Water body GM should not exceed GM criterion during any 30-day interval  Should not be greater than 10% excursion frequency of STV during a 30-day interval  Single-sample maximum (SSM) concentrations will no longer be used  States are expected to address these recommendations in their next triennial review
  5. 5. Recreational Criteria Recommendations (cont.)
  6. 6. http://water.epa.gov/scitech/swguidance/standards/criteria/health/recreation/index.cfm
  7. 7. Ammonia Criteria Recommendations  Published in the Federal Register on August 22, 2013  Supersedes recommended criteria from 1976, 1985, and 1999  Revision necessary because EPA became aware of new toxicity studies showing the relative sensitivity of freshwater mussels to ammonia  Since publication of draft criteria in 2009, additional studies have validated sensitivity of unionid mussels and gill-breathing snails to ammonia  New criteria are more stringent than 1999 recommendations  Duration components remain the same – a one-hour average for the acute criterion and a 30-day average for the chronic criterion  States are expected to address these recommendations in their next triennial review
  8. 8. Criterion Duration 1999 Criteria 2009 Draft Updated Criteria 2013 Final Updated Criteria Acute (1-hour average) 24 19 17 Chronic (30- day rolling average) 4.5* 0.91* 1.9* *Not to exceed 2.5 times the criterion continuous concentration as a 4-day average within a 30-day period. Criteria frequency not to be exceeded more than once in three years on average. Criteria magnitudes are expressed as total ammonia nitrogen (mg TAN/L) at pH 7 and 20°C.
  9. 9. http://water.epa.gov/scitech/swguidance/standards/criteria/aqlife/ammonia/index.cfm
  10. 10. Proposed WQS Regulation Changes  Core of current rules in place since 1983  Proposed rules were published in the Federal Register yesterday  EPA is considering changes to the following:  Administrator’s determinations that new or revised WQS are necessary  Designated uses  Triennial reviews  Antidegradation  Variances to water quality standards  Compliance schedule authorizing provisions
  11. 11. Proposed WQS Regulation Changes (cont.)  The Administrator’s determination update clarifies what constitutes an Administrator’s determination under 303(c)(4)(B) of the Clean Water Act  The designated uses update clarifies the EPA’s minimum expectations for designated uses  The triennial reviews update strengthens the triennial review requirements
  12. 12. Proposed WQS Regulation Changes (cont.)  Antidegradation update clarifies that implementation methods are to be adopted in rule and specifies the minimum requirements.  Variances update establishes regulatory expectations for variances to support consistent, appropriate, transparent and enforceable implementation  Compliance schedule authorizing provisions update specifies that compliance schedule authorizing provisions must be adopted as part of a state or tribe’s water quality standards, and therefore must be submitted to EPA for review and action
  13. 13. http://yosemite.epa.gov/opei/rulegate.nsf/byRIN/2040-AF16 http://water.epa.gov/lawsregs/lawsguidance/wqs_index.cfm
  14. 14. That’s all, folks! John A. DeLashmit, P.E. USEPA Region 7 11201 Renner Blvd. Lenexa, KS 66219 (913)551-7821 delashmit.john@epa.gov

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