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Board adopts EPA-recommended, fish-tissue-based selenium criteria for Knox Creek tributaries
Summary
The board approved site-specific selenium criteria, adopting EPA-recommended fish-tissue and water-column expressions for four tributaries to Knox Creek in Buchanan County after DEQ corrected its proposal to reflect EPA's 2021 updates; several conservation groups had opposed giving fish-tissue data primacy.
The State Water Control Board voted on March 27 to adopt site-specific selenium aquatic-life criteria for four tributaries to Knox Creek in Buchanan County, aligning Virginia with EPA-recommended fish-tissue and water-column expressions for those water bodies.
Tish Robertson, a DEQ water-quality standards scientist, told the board the criteria were requested through a petition from a mining company and that DEQ followed regulatory steps including regulatory advisory panels and public comment. She said EPA’s 2016—and later-updated—criterion is expressed in fish tissue and in water-column…
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