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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 ® 50% 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 />66.5% Binomial 06-18-04 (end) 1640 1600 <br />Dilutions) - % Effluent <br />Measurements Contol 0% ~` 1 9%f ':` .12.5°/u , ~ 25% 50% _ , :.1110% <br /># at Start of Test 20 20 20 20 20 20 <br /># live after 24-hours 20 20 19 20 20 20 <br /># live after 48-hours 20 19 19 19 16 2 <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 />Hardness (mg/I) -Receiving Water? N/A <br />Alkalinity (mg/1) -Receiving Water? N/A <br />pH (initial/final) -Control? 8.2/8.1 100%? 8.3/9.1 <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 <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 />Effluent? N/A Recon. Water? 92 <br />Effluent? 1992 (after dil) Recon. Water? 60 <br />No ^ <br />The SeaCrest Group, LLC 12 <br />