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i <br />y Enviro-Chem Analytical, Inc. <br />685 West Gunnison Avenue, Suite 108 <br />Grand Junction, CO 81505 <br />TABLE 6. _Initial Chemistry Ranges for Daphnia magna <br />48-hour Acute Toxicity Tests Conducted with <br />West Elk Mine Effluent -Test Dates Oct 11-15, 2006 <br />Chronic Toxicity Test <br />West Elk Mine -Oct 2007 <br />2 species <br />Outfall 017 <br />uen onc. <br />(%) <br />pH <br />(mg/L) empera ure <br />(C) on uc ivi <br />(umhos/cm) a mi <br />(mg/L) ar Hess <br />(mg/L CaC03) <br />Hard Water 8.28 9.7 20 3900 1370 238.6 <br />6.50% 8.34 9.5 20 3200 NM NM <br />13.00% 8.38 9.6 20 2980 NM NM <br />25.00% 8.42 9.6 20 2510 NM NM <br />50.00% 8.49 9.7 20 3350 NM NM <br />100.00% 8.55 9.7 20 3700 1850 32.83 <br />NM =Not Measured <br />