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08/09/99 NON 17:18 FAX 801 524 5021 <br /> <br />APPENDIX A <br />USFWS-Utah Field Office -»4 RO-COKANUT IM015 <br />From: Stephens, D., B. Waddell, K. DuBois, E. Peterson. 1994. Field screening of water <br />quality, bottom sediment, and biota associated with the Emery and Scofield project <br />areas, central Utah, 1994. U.S. Geological Survey Water-Resources <br />Investigations Report 96-4298, 39 p. <br />Table 4. Criteria for effects of selenium on fish and wildlife. <br />[µg/L. micrograms per liter; <, less than; >, greater than, mg/kg, milligrams per kilogram; µ91g, micrograms per gram] <br />Medium I No Level of Toxicity <br />effect, concern= threshold3 <br />Water, µg/L (total recoverable) <1 1-2 6>2 <br />Sediment, mg/kg (dry weight) <2 '4 >4 <br />Dietary' µg/g (dry weight) <2 2-3 '>3 <br />Waterbird eggss, µg/g (dry weight) <3 '3-9 >8 <br />Warm water fish, µg/g (dry weight, <3 '4 >4 <br />whole body) <br />Cold water fish, µ9/g (dry weight, <2 $4 >4 <br />whole body) <br />'Selenium concentrations less than this criterion in various media do not appear to be related to any discernible adverse <br />effects on fish and wildlife and are typical of background concentrations in environments not impacted by selenium. <br />'Selenium concentrations at this criterion in various media rarely appear to be related to any discernible effects on fish and <br />wildlife but are elevated above typical background concentrations. <br />'Selenium concentrations exceeding this criterion in various media appear to be related to adverse effects on some fish and <br />wildlife species, such as increased risk of teratogenesis and embryo mortality. <br />`Dietary criteria are on an average daily exposure basis. <br />Vaterbird criteria are based on population mean. <br />'Peterson and Nebeker (1992). <br />'Lemly and Smith (1987). <br />`Lemly (1993). <br />'Skorupa and Ohlendorf (1991).