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Mountain Coal Company CO - 0038766 SCG Project No.: 304222 <br />Site: West Elk Mine <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: Fathead minnow (Pimephales promelas) <br />Test Results Statistical Begin Begin End End <br />(LC50) Method Test Date Test Time Test Date Test Time <br />>100% N/A 8-26-04 1145 8-30-04 1045 <br />Dilutian(s) - % Effluent <br />~ <br />Measµ u~rem nts <br /># at Start of Test CFlntrot`~ <br />0°° <br />40 "`~ ~ w <br />9%_ <br />40 <br />1Z 5% <br />40 ,- ~ <br />2 % <br />40 - <br />5 % <br />40 <br />90"0 <br />40 <br />% i t,.~ f <br />~~NIAi°o <br /># live after 24-hours 40 40 40 40 40 40 <br /># live after 48-hours 40 40 40 40 40 40 <br /># live after 72-hours 40 40 40 39 40 40 <br /># live after 96-hours 40 40 40 39 40 40 <br />Hardness (mg/I) -Receiving Water - N/A Effluent - 28 <br />Recon Water - 92 <br />Alkalinity (mg/I) -Receiving Water - N/A Effluent - 2201 Recon Water - 68 <br />Chlorine (mg/1) - <0.01 pH (initiaUfinal) -Control - 8.1/7.8 100% - 8.3/8.9 <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: Sarah Geer, Joel Mehlenbacher <br />Z <br />The SeaCrest Group 11 <br />