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Mountain Coal CO-0038776 <br />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 ® NORMAL <br />Test Species: Daphnia magna <br />Test Results Statistical Test Time Test Time <br />(LC50) Method Test Date (Begin) (End) <br />06-16-2004 (start) <br />86.6% Binomial 06-18-2004 (end) 1620 1530 <br />Dilutions) - % Effluent <br />Measurements .. Control 0.% + 1.9% -, ' 12 5%, : 25% 50% . i 100"/0:. <br /># at Start of Test 20 20 20 20 20 20 <br /># live after 24-hours 20 20 20 20 20 17 <br /># live after 48-hours 20 20 17 16 17 8 <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/1) -Receiving Water? N/A Effluent? 49 Recon. Water? 92 <br />Alkalinity (mg/1) -Receiving Water? N/A Effluent? 2035 Recon. Water? 60 <br />pH (uutiaUfinal) -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 />Signature Date <br />The SeaCrest Group, LLC 1 I <br />