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Enviro-Chem Analytical, Inc. <br />685 West Gunnison Avenue, Suite 106 <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 Jan. 16-20, 2007 <br />Chronic Tobaty Test <br />West Etk Mine -Jan. 2007 <br />2 species <br />Outfall 017 <br />uen onc. <br />(%) <br />pH <br />(mg/L) empera ure <br />(C) on u w <br />(umhos/cm) im <br />(mg/L) ar ness <br />(mglL CaC03) <br />Hard Water 8.28 9.7 20 3900 1370 238.6 <br />6.50% 8.28 9.1 20 3200 NM NM <br />13.00% 8.4 8.9 20 2980 NM NM <br />25.00% 8.56 9.2 20 2510 NM NM <br />50.00°k 8.54 9.4 20 3350 NM NM <br />100.00% 8.16 9.6 20 3346 1902 26.97 <br />NM =Not Measured <br />