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------------ ------- -- -- -------- <br />;i <br />I;. <br />Enviro-Chem Analytical, Inc. Chronic Toxicity Test L <br />685 West Gunnison Avenue, Suite 108 West Elk Mine -April 2008 i <br />Grand Junction, CO 81505 2 species s; <br />Outfall 001 <br />TABLE 3. Final Chemistry Ranges for Fathead Minnow and Daphnia magna <br />Toxicity Tests Conducted with West Elk Mine <br />Effluent - Test Date April 15-19, 2008 <br />Effluent Conc. <br />N <br />Test Organism <br />pH Dissolved Oxygen <br />(mg/L) Temperature <br />C ) <br />MHW Control FHM 7.740-8.136 8.1-8.6 20-20.2 <br /> D. magna 8.998 8.6 20-20.2 <br />6.5 FHM 8.237-8.388 8.1-8.4 20-20.2 <br /> D. magna 9.235 8.8 20-20.2 <br />13 FHM 8.226-8.611 8.1-8.2 20-20.2 <br /> D. magna 9.201 8.7 20-20.2 <br />25 FHM 8.261-8.832 8.5-8.6 20-20.2 <br /> D. magna 9.199 8.5 20-20.2 <br />50 FHM 8.256-9.016 8.5-8.6 20-20.2 <br /> D. magna 9.171 8.8 20-20.2 <br />100 FHM 8.259-8.992 8.2-10.3 20-20.2 <br /> D. magna 9.093 8.5 20-20.2 <br />FHM = Fathead Minnow