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CONCLIISION <br />Previous test results give evidence that high alkalinity is the <br />cause of Somerset Mine effluent toxicity to C. dubia. Somerset <br />Mining Company has maintained that there is no current effluent <br />treatment in place that would result in high alkalinity. The <br />results of this test suggest that the inlet spring water may be a <br />major contributor to effluent toxicity by introducing high <br />alkalinity. <br />It is recommended that Somerset Mining Company contact the Colorado <br />Department of Health immediately to discuss these test results and <br />the test results from the initial TIE (October 15, 1992). At the <br />request of Mr. Basil Bear, Commercial Testing and Engineering is <br />prepared to meet with Somerset Mining Company and the Col. Dept. of <br />Health to discuss WET testing options. <br />-5- <br />COMMERC <br />' a~ Cooy Water marletl <br />=c' your P.a~ea ion <br />