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i - - -- - <br />r 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 5. Percent Survival for Daphnia magna After 48-hour Expsure to <br />West Elk Mine Effluent -Test Dates Oct 23-27, 2007 <br />Effluent Concentration <br />~%) <br />Percentage Survival <br />MHW Control 100 <br />6.5 100 <br />13.0 100 <br />25.0 100 <br />50.0 100 <br />100.0 100 <br />