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L16 COMMERCIAL TESTING & ENGINEERING GO. <br />NARRATIVE <br />• CLIENT <br />Mountain Coal Company L.L.C., West Elk Mine, P.O. Box 591, 5174 Highway 133, <br />Somerset, CO 81434 <br />• DATE OF REPORT <br />January 13, 2003 <br />• PERMIT AND SAMPLE INFORMATION <br />NPDES permit #: <br />Type of sample: <br />Date and time of sample(s): <br />Date and time of test start: <br />Dilution water: <br />Receiving temperature(s): <br />CO-0038776 <br />Effluent Grab <br />01/07/03 0900 <br />Ol /08/03 1155 <br />Reconstituted Laboratory Water <br />8.0°C <br />• TEST ORGANISMS <br />Daphnia magna <br />Fathead Minnow <br />Age: <24 hrs <br />Age: 9 days <br />• PROCEDURE <br />Acute, 48 and 96 hour bioassays as outlined in the most recent protocols specified by the <br />Water Quality Conttol Division of the Colorado Department ofHealth (1998). <br />• DISCUSSION <br />West Fork of Sylvester Gulch effluent discharge site 017 was not acutely toxic to either <br />fathead minnows or Daphnia magna survival. Therefore, Mountain Coal Company is in <br />compliance with the acute WET portion of its Colorado State Discharge Permit for the first <br />quarter of 2003. <br />,afi <br />