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L16 COMMERCIAL TESTING 6 ENOINEERINO CO. <br />;--~ Naxx~TIVE <br />• CLIENT <br />Westem Fuels -Colorado, New Horizon Mine, P.O. Box 628, Nucla, CO 81824 <br />DATE OF REPORT <br />January 27, 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-0000213 <br />Effluent Grab <br />01/20/03 1045 <br />01/21/03 1205 <br />Reconstituted Laboratory Water <br />1.0°C <br />• TEST ORGANISMS <br />Daphnia magna <br />Fathead Minnow <br />Age: Q4 hrs <br />Age: 10 days <br />• PROCEDURE <br />Acute, 48 and 96 hour bioassays as outlined in the most recent protocols specified by the <br />Water Quality Control Division of the Colorado Department of Health (1998). <br />• DISCUSSION <br />New Horizon Mine dischazge site 007 was not acutely toxic to either fathead minnow or <br />Daphnia magna survival. Therefore, Westem Fuels -Colorado is currently in compliance <br />with the acute WET portion of its Colorado State Dischazge Permit for the first quarter of <br />2003. <br />