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<br />inter•fnountainlaboratories, Inc. <br />1673 Terra Avenue <br />Sheridan, WY 82807 <br />Sample Analysis Report <br />CLIENT: Colowyo Coal Company, L. P. <br />5731 State Highway 13 <br />Meeker, CO 81641 <br />Date Reported: 8/23/2006 <br />ReportlD: 50608248001 <br />Client Sample ID: 003A <br />Project: Colowyo Mine <br />Matrix: Water/Surfacewater <br />Collection Date: 8/10/2006 11:15:00 AM <br />Date Received: 8/11/2006 12:00:00 PM <br />Lab ID: 50608248-001 <br />Analyses Result Units MCL Qual PGIL Method Date Analyzed/Init <br />Field <br />pH 8.46 s.u. N/A 0.01 Field 08/10/20061115 <br />Conductivity 2933 µmhos/cm N/A 0.01 Field 08/10/20061175 <br />Depth To Water NA tt N/A 0.01 Field 08/10/2006 1115 <br />Temperature 16.6 `C N/A 0.1 Field 08/10/2006 1115 <br />General Parameters <br />pH 8.5 s.u. 6.5-9 0.1 EPA 150.1 08!15/2006 1236 WO <br />Electrical Conductivity 2940 µmhos/cm N/A 5 SM 2510B 06/15/2006 1236 WO <br />Total Dissolved Solids (180) 2520 mg/L N/A 10 SM 2540 08/14/2006 1021 AF <br />Total Suspended Solids 156 mg/L 35 5 SM 2540 06/1 t/2006 7614 AF <br />Settleable Solids ND ml/I/hr N/A 1 SM 2540E 08/11/2006 1350 ML <br />Total Recoverable Metals <br />Iron 0.10 mg/L 3.5 0.05 EPA 200.7 08/15/2006 1420 AB <br />These results apply only to the samples tested. <br />Qualifiers: Value exceeds Maximum Contaminant Level <br />E Value above quantitation range <br />J Analyte detected below quantitation limits <br />ND Not Detected at the Reporting Limit <br />Reviewed by: ~"~~` <br />Wendy Owen, Project Manager <br />B Analyte 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 1 of 1 <br />