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Inter-Mountain Laboratories, Inc. <br />1673 Terra Avenue, Sheridan, Wyoming 62801 <br />r~ <br />(800) - 826-1097 <br />Sample Analysis Report <br />CLIENT: Colowyo Coal Company, L.P. Date Reported: 2/21/2007 <br />5731 State Highway 13 Report lD: 50702163001 <br />Meeker, CO 81641 <br />Client Sample ID 001A Collection Date: 2/13/2007 10:50:00 AM <br />Project: Colowyo Mine Date Received: 2/14/2007 11:20:00 AM <br />Matrix: Water Lab ID: 50702163-001 <br /> Work Order: 50702163 <br />Analyses Result Units MCL Qual POL Method Date Analyzed/Init <br />Field <br />pH 7.85 s.u. N/A 0.01 Field 02/13/20071050 <br />Conductivity 2120 µmhos/cm NIA 1 Field 02113120071050 <br />Depth To Water NA ft NIA 0.01 Field 02/13/2007 1050 <br />Temperature 2.2 `C N/A 0.1 Field 02/13/20071050 <br />Flow Rate (MGD) 006 MGD N/A 0.0065 Field 02/13/2007 1050 <br />Sheen No N/A NA Field 02/1 3/2007 1 050 <br />-General Parameters <br />pH 8.1 s.u. 6.5-9 0.1 EPA 150.1 02/15/2007 1055 AT <br />Electrical Conductivity 560 µmhos/cm N/A 5 SM 25108 02/75/2007 1055 AT <br />Total Dissolved Solids (160) 380 mg/L N/A 10 SM 2540 02/14/2007 1359 AF <br />Total Suspended Solids 56 mg/L 35 S SM 2540 02/15/2007 823 AF <br />Settleable Solids ND ml/I/hr N/A 1 SM 2540E 02/14/20071242 HG <br />Total Recoverable Metals <br />Iron 3.10 mg/L 3.5 0.05 EPA 200.7 02/16/2007437 RM <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 De[ec[e~d Tat t/h~e Reporting Limit <br />Reviewed by:.~~.v-'o-/~ v~~~''"'~' <br />Patricia Quade, 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 />5 Spike Recovery outside accepted recovery limits <br />Page 1 of 3 <br />