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The Ie~Crert ~~ou~ <br />~i~i ~i/r~i~~ ~ifi ~i~i ~i~~ ~ ~i/r~i-~i <br />An Environmental Services Company <br />April 14, 2003 <br />Mr. Henry 6arbe <br />Mountain Coal Company <br />P.O. Box 591 <br />Somerset. Colorado 81434 <br />Dear Henry: <br />I am pleased to submit the results o` the acute biomonitoring tests performed in April on <br />the West Elk Mine 017 discharge. No LC50 concentration was created in either ;est with <br />either test species. Therefore the effluent passed the whole effluent toxicity test <br />guidelines. <br />There were some survival effects seen and these should be noted, however they were <br />not enough to produce an LC50 concentration for either test. <br />Please call if you have any questions. <br />Sincerely. <br />n ~ ~Nl, <br />Kel .Carr <br />Laboratory Manager <br />enclosures: Report. Invoice <br />;r • Lcuisvllle, Colorado SCA2' • 3Q3-bGl•9324 • Fcx 3C3fi61-932a <br />