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ti <br />Enviro-Chem Analytical, Inc. <br />685 West Gunnison Avenue, Suite 108 <br />Grand Junction, CO 81505 <br />Chronic Toxicity Test <br />West Elk Mine -Oct. 2007 <br />2 species <br />Outfall 017 <br />TABLE 3. Final Chemistry Ranges for Fathead Minnow and Daphnia magna <br />Toxicity Tests Conducted with West Elk Mine <br />Effluent -Test Date October 23-27, 2007 <br />Effluent Conc. <br />(%) <br />Test Organism <br />pH Dissolved Oxygen <br />(mg/L) Temperature <br />C ) <br />MHW Control FHM 7.88-7.96 9.6-9.8 20-20.2 <br />Hard Water D. magna 8.36 9.6 20-20.2 <br />6.5 FHM 7.60-7.48 9.5-9.6 20-20.2 <br /> D. magna 8.33 9.9 20-20.2 <br />13 FHM 7.46-7.68 9.6-9.8 20-20.2 <br /> D. ma na 8.38 10.9 20-20.2 <br />25 FHM 7.62-7.89 9.5-9.6 20-20.2 <br /> D. magna 8.38 10 20-20.2 <br />50 FHM 8.03-8.13 9.6-9.8 20-20.2 <br /> D. ma na 8.32 9.9 20-20.2 <br />100 FHM 8.22-8.28 9.9-10.1 20-20.2 <br /> D. ma na 8.29 9.9 20-20.2 <br />FHM =Fathead Minnow <br />