American Iron and Steel Institute filed 1 comment on this docket between Apr 25, 2017 and Apr 25, 2017. 17 other organizations filed here. The comment window closed 3382d ago.
Please find attached comments on the draft Conductivity guidance. Paul Balserak 703 969 1789 American Iron and Steel Institute
The EPA has developed a set of draft methods that states and authorized tribes may use to derive field-based ecoregional ambient aquatic life criteria for specific conductivity, a measurement of ionic concentration, in flowing waters. The EPA's methods provide flexible approaches for developing science-based conductivity criteria that reflect ecoregional- or state-specific factors. Once final, states and authorized tribes located in any region of the country may use the methods to develop field-based conductivity criteria for flowing waters. The draft document provides a scientific assessment of ecological effects and is not a regulation.
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