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L^~ COMMENCIALTESTING 6 ENGINEENINGCO. <br />~) NAxxATIVE <br />• CLIENT <br />Western Fuels -Colorado, New Horizon Mine, P.O. Box 628, Nucla, CO 81424 <br />• DATE OF REPORT <br />July 15, 2002 <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 />• TEST ORGANISMS <br />Daphnia n7agna <br />Fathead Minnow <br />~ .~ <br />• PROCEDURE <br />CO-0000213 <br />Effluent Grab <br />07/10/02 1045 <br />07/1 l/02 1125 <br />Reconstituted Laboratory Water <br />Age: <24 hrs <br />Age: 11 days <br />Acute, 48 and 96 hour bioassays as outlined in the most recent protocols specified by the <br />Water Quality Control Division ofthe Colorado Department of Health (1998). <br />• DISCUSSION <br />New Horizon Mine discharge site 007 was not acutely toxic to either fathead minnow or <br />Daphnia magna survival. Therefore, Western Fuels -Colorado is currently in compliance <br />with the acute WET portion of its Colorado State Discharge Permit for the third quarter of <br />2002. <br />EJ <br />