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MountainCoal CO-0038776 SCG Project Number: 304146 <br />COLORADO -CDPS WET TEST REPORT FORM -ACUTE <br />Permittee: Mountain Coal Outfall(s): 017 <br />CDPS No.: CO-0038776 <br />Test Type: Routine ^ Accelerated ® 12.5% DILUTION <br />Test Species: Daphnia magna <br />Test Results Statistical Test Time Test Time <br />(LC50) Method Test Date (Begin) (End) <br />06-16-04 (start) <br />63.8% Binomial 06-18-04 (end) 1700 1640 <br />Dilutions) - % Effluent <br />Measurements Control 0% : _: 19%, ' 12 5"/0' 25% `50"/°. 100% ~` <br /># at Start of Test 20 20 20 20 20 20 <br /># live after 24-hours 20 20 20 20 18 5 <br /># live after 48-hours 20 20 20 20 17 0 <br /># live after 72-hours N/A N/A N/A N!A N/A N/A <br /># live after 96-hours N/A N/A N/A N/A N/A N/A <br />Receiving water used in dilution? Yes ^ No <br />Total Residual Chlorine, mg/1(100%)? <0.01 <br />Hazdness (mg/I) -Receiving Water? N/A Effluent? N/A Recon. Water? 92 <br />Alkalinity {mg/1) -Receiving Water? N/A Effluent? 1914 Recon. Water? 60 <br />pH (initiaUfinal) -Control? 8.2/8.1 100%? 8.2/9.0 <br />Total Ammonia as N (mg/1) -Initial? 100%: 1.23 Final? 100%: 1.18 <br />Were all Test Conditions in Conformance with Division Guidelines? Yes ® No ^ <br />If NO, list deviations from test specifications: <br />Laboratory: The SeaCrest Group, LLC <br />Comments: <br />Analyst's Name(s): Amanda Wade, Shannon Phelps <br />The SeaCrest Group, LLC 12 <br />