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Client: Mountain Coal Company CO - 0038766 <br />Site: West Elk Mine 017 <br />SCG Project No.: 305112 <br />WET TEST REPORT FORM -ACUTE <br />Permittee: Mountain Coal Company Outfall(s): 017 <br />Permit No.: CO - 0038766 <br />Test Type: Routine ® Accelerated ^ <br />Test Species: Daphnia magna <br />Test Results Statistical Begin Begin End End <br />(LC50) Method Test Date Test Time Test Date Test Time <br />54.3% Probit OS-12-2005 1500 OS-14-2005 1400 <br />Dilutions) - % Effluent <br />:; - <br />Measurements _ .. Control .p <br />-.~(0%).~ . ,. . ' ~' ,f i 4 x <br />~~~ "1 9-°~z. ~ {. .+~-.` <br />:'125%R n t ~ : <br />~ 2596 ~ ~-": a i-4 4 - <br />,~ ~ 5,0~%;: ~ .` 3 <br />~.•1~00°10~~~ <br /># at Start of Test 20 20 20 20 20 20 <br /># live after 24-hours 20 20 20 20 17 7 <br /># live after 48-hours 20 20 20 19 10 3 <br />Hazdness (mg/1) -Receiving Water - N/A Effluent - 60 Recon Water - 81 <br />Alkalinity (mg/1) -Receiving Water - N/A Effluent -1995 Recon Water - 69 <br />Chlorine (mg/1) - <0.01 pH (initial/final) -Control - 8.0/8.2 100% - 8.3/9.0 <br />Total Ammonia as N (mg/1) - <1.0 <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 <br />Comments: <br />Analyst's Name: Richard Morgan and Holly Garrett <br />oS z7 d5 <br />The SeaCrest Group 11 <br />