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Enviro-Chem Analytical, Inc. <br />665 West Gunnison Avenue, Suite 108 <br />Grand Junction, CO 81505 <br />TABLE 4. Percentage Survival Larval Fathead Minnows after 96-hour <br />Exposure to West Elk Mine Effluent - <br />Test Dates Jan. 16-20, 2007 <br />Chronic Toxicity Test <br />West EIk Mine -Jan. 2007 <br />2 species <br />Outfall 017 <br /> MHW Effluent Concentration % <br />Re iipte Control 6.50 13.0 25.0 50.0 100.0 <br />SURVIVAL %) <br />A 100 100 100 100 100 100 <br />B 100 100 100 100 100 100 <br />C 100 100 100 100 100 100 <br />D 100 100 100 100 100 100 <br />Pooled Mean 100 100 100 100 100 100 <br />Standard <br />Deviation <br />_ <br />_ <br />_ <br />_ <br />_ <br />