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Client: Western Fuels CO-0000213 SCG Project No.: 310547 <br />Site: New Horizon Mine NPDES 011 <br />WET TEST REPORT FORM - ACUTE <br />Permittee: Western Fuels New Horizon Mine Outfall(s): NPDES 011 <br />Permit No.: CO-0000213 <br />Test Type: Routine ® Accelerated ? <br />Test Species: Ceriodaphnia dubia <br />Test Results Statistical Begin Begin End End <br />(LC50) Method Test Date Test Time Test Date Test Time <br />>100% N/A 05-25-2010 1350 05-27-2010 1330 <br />Dilution(s) - % Effluent <br /> <br />Measurements Control <br />% <br />0 <br />6125% <br />12.5% <br />25% <br />50% <br />100% <br /># at Start of Test - <br />20 20 20 20 20 20 <br /># live after 24-hours 20 20 20 20 20 20 <br /># live after 48-hours 19 20 20 20 20 20 <br />Hardness (mg/L) - Receiving Water: N/A Effluent: 1700 Recon Water: 90 <br />Alkalinity (mg/L) - Receiving Water: N/A Effluent: 172 Recon Water: 59 <br />Chlorine (mg/L) - <0.01 pH (initial/final) - Control: 8.2/8.3 100%: 8.2/8.4 <br />Total Ammonia as NH3 (mg/L) - Effluent: <0.03 <br />Were all Test Conditions in Conformance with Division Guidelines? YES ® NO ? <br />If NO, list deviations from test specifications: <br />Laboratory: SeaCrest Group <br />Comments: <br />Analyst's Name: Melissa Mimna, and Steve Mullins <br /> <br />SeaCrest Group 12