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Inter-Mountain Laboratories, Inc. <br />7673 Terra Avenue, Sheridan, Wyoming 82801 <br />Sample Analysis Report <br />(800) - 828-1097 <br />CLIENT: Colowyo Coal Company, L.P. Date Reported: 2/21/2007 <br />5731 State Highway 13 Report ID: S0702163001 <br />Meeker, CO 81641 <br />Client Sample ID 004A Collection Date: 2/13/2007 11:12:00 AM <br />Project: Colowyo Mine Date Received: 2/14/2007 11:20:00 AM <br />Matrix: Water Lab ID: S0702163-003 <br /> Work Order: 50702163 <br />Analyses Result Units MCL Qual POL Method Date Analyzed/Init <br />Field <br />pH 8.65 s.u. N/A 0.01 Field 02/13/20071112 <br />Conductivity 2441 µmhos/cm N/A 1 Field 02/13/20071112 <br />Depth TO Water NA ft N/A 0.01 Field 02/13/20071112 <br />Temperature 0.7 `C N/A 0.1 Field 02/13/20071112 <br />Flow Raie (MGD) 0.08 MGD N/A 0.0065 Field 02/13/2007 1112 <br />Sheen No N/A NA Field 02/13/2007 11 7 2 <br />General Parameters <br />pH 8.2 s.u. 9 0.1 EPA 150.1 02/15/20071110 AT <br />Electrical Conductivity 307 µmhos/cm N/A 5 SM 25108 02/15/2007 1110 AT <br />Total Dissolved Solids (180) 270 mg/L N/A 10 SM 2540 02/14/2007 1409 AF <br />Total Suspended Solids 76 mg/L 35 S SM 2540 02/15/2007 833 AF <br />Settleable Solids ND ml/I/hr N/A - 1 SM 2540E 02/15/2007 825 HG <br />Total Recoverable Metals <br />Iron 7.34 mg/L 3.5 0.05 EPA 200.7 02/16/2007444 RM <br />These resutis apply only to [he samples tested. <br />qualifiers: Value exceeds Maximum Contaminant Level <br />E Value above quantitation range <br />J Analyte tle[ected below quantitation limits <br />ND Not Detected at t/h~e Reeporting Limit <br />Reviewed by:..Q~7J~..-'~ ~ e"`^-' <br />Patricia Quade, Project Manager <br />B Analy[e detected in the associated Method Blank <br />H Holding times for preparation or analysis exceeded <br />L Analyzed by a contract laboratory <br />S Spike Recovery outside accepted recovery limits <br />Page 3 of 3 <br />