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Client: Mountain Caal Company CO - 0038776 <br />Site: West Elk Mine Outfa11017 <br />SCG Project No.: 306048 <br />WET TEST REPORT FORM -ACUTE <br />Permittee: Mountain Coal Company Outfafl(s): 017 <br />Permit No.: CO-0038776 <br />Test Type: Routine ® Accelerated ~ <br />Test Species: Fathead minnow (Pimephales promelas) <br />Test Results Statistical Begin Begin Eud Eud <br />(LC50) Method Test Date Test Time Test Date Test Time <br />>100% Probit 01-20-2006 1205 01-24-2006 1225 <br />Dilutions) - % Effluent <br /> <br />e8surementa ~ P <br />~an(ul(OJo) <br />~'19~°l° ~i <br />~ 12`~°!0'~'~ ~~~ <br />~~~~'2~a°~" <br />;; ~ "50°lm~~,. <br />~; ~ It10°~ <br /># at Start of Test 40 40 40 40 40 40 <br /># live after 24-hours 40 39 40 40 40 40 <br /># live after 48-hours 39 39 39 40 40 39 <br /># live after 72-hours 38 38 39 37 40 39 <br /># live after 96-hours 38 38 38 34 36 35 <br />Hardness (mg/1) -Receiving Water - N/A Effluent - 32 Recon Water - 92 <br />Alkalinity (mg/1) -Receiving Water - N/A Effluent - 1590 Recon Water - 61 <br />Chlorine (mg/1) - <0.01 pH (initial/final) -Control - 7.9/7.9 100% - 8.1/8.9 <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: Amy Casselbeny and Dustin Facteau <br />pl'3.'IOto <br />The SeaCrest Group 18 <br />