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• - wKw.energylab.com Helena, MT 877-472-0711 • Billings MT 800-735-4489 • Casper, WY 888-235-0515 <br />I E MafyliplFxcallanca Sfice 1951 # Gillette, WY 866-686-7175 • Rapid City. SO 888-672-1225 Q Go1162e Station. TX 888-690-2218 <br />LABORATORY ANALYTICAL REPORT <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date' 01/05/11 <br />Project: Schwart2walder Mine Monitoring Program-Surface Wat Collection Date: 11/18/10 10:20 <br />Lab ID: C1 01 1 0787-002 DateReceived: 11/22/10 <br />Client Sample ID: SW ARH (S25437) Matrix: Aqueous <br /> MCL/ <br />Analyses Result Units Qualifiers RL QCL Method Analysis Date / By <br />METALS-TOTAL <br />Mercury ND mg/L 0.0001 E245.1 11/30/10 13:14 / rdw <br />Molybdenum 0.018 mg/L 0.005 E200.8 12110/10 05:17 / sml <br />Silver ND mg/L 0.00005 E200.8 12/17/10 01:46 / sml <br />Thallium ND mg/L 0.0002 E200.8 12/10/10 05:17 / sml <br />Uranium 0.453 mg/L 0.0002 E200.8 12110/10 05:17 / sml <br />Zinc ND mg/L 0.005 E200.8 12110110 05:17,1 smi <br />RADIONUCLIDES - DISSOLVED <br />Radium 226 0.56 pCi/L E903.0 12/07/10 23:36 / trs <br />Radium 226 precision (±) 0.17 pCi/L E903.0 12/07/10 23:36 / trs <br />Radium 226 MDC 0.16 pCi/L E903.0 12/07/10 23:361 its <br />RADIONUCLIDES - TOTAL <br />Gross Alpha 317 pCi/L E900.0 12/01 /10 03:39 / ep <br />Gross Alpha precision (±) 8.4 pCi/L E900.0 12/01/10 03:39 / ep <br />Gross Alpha MOC 2.8 pCi/L E900.0 12/01/10 03:39 / ep <br />Gross Beta 811 pCi/L E900.0 12/01/10 03:39 / ep <br />Gross Beta precision (±) 2.6 pCi/L E900.0 12101110 03:39 / ep <br />Gross Beta MDC 2.5 pCi/L E900.0 12/01/10 03:39 / ep <br />Radium 226 0.79 pCi/L E903.0 12108/10 08:24 / Irs <br />Radium 226 precision (±) 0.19 pCi/L E903.0 12/08/10 08:24 / Irs <br />Radium 226 MDC 0.13 pCi/L E903.0 12/08/10 08:24 / Irs <br />Radium 228 -0.3 pCi/L U RA-05 12/03/10 11:27 / plj <br />Radium 228 precision (±) 0.74 pCi/L RA-05 12/03/10 11:27 / pij <br />Radium 228 MDC 1.3 pCUL RA-05 12/03/10 11:27 / pij <br />DATA QUALITY <br />A/C Balance (± 5) 0.210 % Calculation 01 /05/11 13:11 / sdw <br />Anions 5.83 meq/L Calculation 01/05/11 13:11 / sdw <br />Cations 5.85 meq/L Calculation 01/05/11 13:11 / sdw <br />Solids, Total Dissolved Calculated 351 mg/L Calculation 01/05/11 13:11 / sdw <br />TDS Balance (0.80 - 1.20) 1.02 Calculation 01/05/11 13:11 / sdw <br />FIELD PARAMETERS <br />Conductivity 567 umhos/cm FIELD 11/18/10 10:20 <br />pH 8.20 s.u. FIELD 11/18/1010:20/ <br />Temperature 8.5 `C FIELD 11/18/10 10:20 <br />Performed by Sampler <br />Report RL - Analyte reporting limit. MCL - Maximum contaminant level. <br />Definitions: QCL - Quality control limit. ND - Not detected at the reporting limit . <br />MDC - Minimum detectable concentration U - Not detected at minimum detectable concentration <br />Page 5 of 30