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STATE
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PROJECT / ACCOMPLISHMENT
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Alaska:
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- Petition for rulemaking triggered EPA proposal to withdraw federally adopted human health arsenic criteria on a
statewide basis.
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California:
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- Proper averaging periods for ammonia and toxics approved in two regions.
- Obtained approval of site-specific criteria for ammonia, cadmium, copper, and lead.
- Obtained approval of innovative mixing zone approach which considers toxicological characteristics of
pollutant.
- Developed proper reasonable potential analyses to avoid multiple worst-case assumptions in permit development.
- Agreement reached to use fish tissue data to assess need for mercury limits.
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Colorado:
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- Obtained state approval for site-specific sludge application program recognizing low potential for exposure from
selenium.
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Connecticut:
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- Copper criteria corrected to be less restrictive for municipal discharges on a statewide basis.
- Obtained approval for mass limitations approach to allow appropriate metals limitations for individual facilities.
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Delaware:
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- Use of innovative wasteload allocation techniques allowed.
- Expanded procedures for site-specific water quality standards approved.
- Less restrictive mixing zones permitted.
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Delaware River Basin Commission:
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- Obtained approval of less restrictive mixing zone policies.
- Obtained approval of site-specific approaches for permit calculations.
- Updated lead and arsenic criteria.
- Clarification of reasonable potential procedures for including limitations in permits.
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Florida:
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- Obtained state approval of innovative flow-based permitting for WET limitations.
- Approval of a permit compliance provision exception for toxicity from a federally approved pesticide.
- Obtained approval of site-specific mixing zones.
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Georgia:
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- Approval of site-specific standards for copper and zinc.
- Statewide revision of criteria to measure only the toxic form of metals.
- Agreement on innovative approach to chronic WET implementation.
- Approval of innovative pretreatment limitations analyses to reduce industrial discharge requirements using
inter-plant pollutant trading.
- Approval of Section 303(d) TMDL de-listing.
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Iowa:
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- Approval of revised standards and permit calculations for ammonia on a statewide basis.
- Prepared regulatory update on numerous water quality issues that trigger numerous state program revisions.
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Kansas:
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- Initiated statewide update to permits program.
- Obtained statewide revision to ammonia toxicity, mixing zone, and design flow provisions used to calculate NPDES
limitations.
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Kentucky:
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- Filed petition to recognize variability issue regarding biomonitoring procedures that led to statewide modification
of permit provisions.
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Louisiana:
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- Obtained EPA's concurrence on use of fish tissue measurements to address mercury bio-accumulation concerns.
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Maine:
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- Obtained state re-evaluation of aluminum criteria.
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Maryland:
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- Obtained EPA/state approval of site-specific approach to evaluate iron-related toxicity.
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Massachusetts:
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- Statewide revision of metals criteria to the bioavailable form.
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Minnesota:
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- Stayed the implementation of ammonia requirements pending the outcome of EPA's review of the national criteria.
- Prepared evaluation leading to statewide revision of water quality-based permitting program.
- Agreement reached on the use of stream/plant flow correlations for permit derivation.
- Agreement reached to revise copper and silver criteria implementation.
- Innovative approach to avoid chlorine non-compliance due to short-term exceedances.
- Obtained approval of innovative flow-based permit requirements for ammonia.
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Missouri:
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- Obtained first approval for high rate diffuser to the Mississippi River authorizing elevated ammonia discharge.
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New Hampshire:
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- NPDES permit calculation procedures modified to authorize flow correlation and use of drought and treatment plant
flows to establish water quality-based limits.
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New Jersey
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- Across-the-board update of NPDES permitting processes (all aspects).
- Deletion of flow limitations
- Correction of permit averaging periods.
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New Mexico:
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- Establishment of less stringent ammonia criteria statewide.
- Provided for application of metals criteria under a dissolved protocol.
- Authorized use of probabilistic modeling methodologies.
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North Carolina:
click here for article
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- Secured adoption of innovative point/non-point pollutant credits trading program for nitrogen.
- Obtained first state approval for removal credits program.
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North Dakota:
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- Obtained statewide update to ammonia criteria and design flows.
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Oklahoma:
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- Implemented program to prevent interference due to major industrial user.
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Oregon:
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- Averaging periods on the dissolved oxygen standard revised to reflect the latest EPA science.
- Chronic criteria revised from daily minimum to 30 day averages.
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Pennsylvania:
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- Revision of the metals criteria to allow dissolved, bioavailable approach.
- Withdrawal of silver chronic criteria.
- Agreement on the use of fish tissue data to modify mercury human health criteria.
- Modification of acute criteria application in mixing zones.
- Corrected averaging period approach on acute standards.
- Approval of innovative WER procedures for deriving copper limitations.
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Tennessee:
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- Initiated program to clarify proper application of federal bypass regulation and allow authorization of blending to
manage peak wet weather flows.
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Utah:
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- Approved use of probabilistic modeling and site-specific ammonia standards.
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Virginia:
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- Obtained approval of use of dissolved metals approach.
- Secured first state approval of probabilistic modeling.
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