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<br />(F)
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<br />and adopting standards. For example, any water body segment with
<br />water quality standards that do not include the goal uses
<br />specified in CWA ~ 101(a) (2) shall be re-examined every three
<br />years to determine if any new information has become available.
<br />If such new information indicates the CWA goal uses are
<br />attainable, the Tribe shall revise.its standards accordingly.
<br />Public hea~ings shall be held in accordance with U.S.
<br />Environmental Protection Agency (EPA) regulations. The proposed
<br />water quality standards revisions and supporting analyses shall
<br />be made available to the public prior to the hearing. The Tribe
<br />shall submit the revised standards and any supporting analyses to
<br />the EPA Regional Administrator for review and approval within 30
<br />days following the final action to adopt revised standards. The
<br />tribal sub~ission shall be consistent with EPA requirements found
<br />in 40 CFR 131.6.
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<br />III DEFINITIONS
<br />
<br />(A)
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<br />Acute Standard is the concentration of an element that
<br />protects the biota in a water body from short term effects,
<br />including lethality. An acute standard is implemented with a
<br />specified duration and frequency of recurrence as defined in
<br />section XIV.
<br />
<br />(B)
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<br />Antidegradation is an element of the Tribe's water quality
<br />standa~ds that is intended to maintain and protect existing
<br />uses and the existing quality of high quality waters and
<br />outstanding natural resource waters.
<br />
<br />(C)
<br />
<br />Best Management Practices (BMPs) are government and industry
<br />recommended operating procedures effective at preventing or
<br />reducing water pollution originating from nonpoint sources.
<br />
<br />Biologipal Criteria, also known as biocriteria, are narrative
<br />express~ons or numeric values of the biological
<br />characteristics of aquatic communities based on appropriate
<br />reference conditions. Biological criteria are intended to .
<br />serve as an index of aquatic community health.
<br />
<br />Chronic, Standard is the concentration of an element that
<br />protect? the biota in a water bOdy from toxic effects that
<br />include, but are not limited to, demonstrable abnormalities
<br />and adverse effects on survival, growth or reproduction. A
<br />chronic. standard is implemented with a specified duration and
<br />frequenCY of recurrence as defined in Section XIV.
<br />
<br />Cold Water Biota are aquatic life, including fish, that are
<br />normally found in waters where the temperature does not often
<br />exceed 200 C.
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