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wwwtnergylab.com Helena, Mr B77-472-0711 + Billings, MT 800-735-4489 + Casper, WY 888-235-0515 <br />Ans"ca/ErespsweSmcs IM Gillette, WY 865-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-890-2218 <br />LABORATORY ANALYTICAL REPORT <br />Client: Cotter Corporation <br />Project: Schwartzwalder Mine <br />Lab ID: C10080962-004 <br />Client Sample ID: SW-PL (S25180) Report Date: 09/27/10 <br />Collection Date: 08/24/10 16:03 <br />DateReceived: 08/26/10 <br />Matrix: Aqueous <br /> MCL/ <br />Analyses Result Units Qualifiers RL QCL Method Analysis Date / By <br />METALS-TOTAL <br />Molybdenum ND mg/L 0.005 E200.8 09/08/10 04:02 / smI <br />Silver ND mg/L 0.001 E200.8 09/08/10 04:02 / sml <br />Thallium ND mg/L 0.001 E200.8 09/03/10 01:15 / sml <br />Uranium 0.0057 mg/L 0.0002 E200.8 09/03/10 01:15 / sml <br />Zinc 0.011 mg/L D 0.008 E200.7 09/01/10 14:26 / rdw <br />RADIONUCLIDES - DISSOLVED <br />Radium 226 -0.08 pCi/L U E903.0 09/20/10 10:34 / trs <br />Radium 226 precision (±) 0.12 pCi/L E903.0 09/20/10 10:34 / trs <br />Radium 226 MDC 0.24 pCi/L E903.0 09/20/10 10:34 / trs <br />RADIONUCLIDES - TOTAL <br />Gross Alpha 4.3 pCi/L E900.0 09/10/10 03:35 / ep <br />Gross Alpha precision (±) 1.3 pCi/L E900.0 09/10/10 03:35 / ep <br />Gross Alpha MDC 1.7 pCi/L E900.0 09/10/10 03:35 / ep <br />Gross Beta 3.7 pCi/L E900.0 09/10/10 03:35 / ep <br />Gross Beta precision (±) 1.6 pCi/L E900.0 09/10/10 03:35 / ep <br />Gross Beta MDC 2.5 pCi/L E900.0 09/10/10 03:35 / ep <br />Radium 226 0.12 pCi/L U E903.0 09/20/10 12:11 / trs <br />Radium 226 precision (±) 0.13 pCi/L E903.0 09/20/10 12:11 / trs <br />Radium 226 MDC 0.19 pCi/L E903.0 09/20/10 12:111 trs <br />Radium 228 0.97 pCi/L U RA-05 09/13/10 11:42 / plj <br />Radium 228 precision (±) 0.81 pCi/L RA-05 09/13/10 11:42 / pli <br />Radium 228 MDC 1.3 pCi/L RA-05 09/13/10 11:42 / pli <br />DATA QUALITY <br />A/C Balance (± 5) -2.53 % Calculation 09/27/10 16:24 / kbh <br />Anions 3.35 meq/L Calculation 09/27/10 16:24 / kbh <br />Cations 3.19 meq/L Calculation 09/27/10 16:24 / kbh <br />Solids, Total Dissolved Calculated 200 mg/L Calculation 09/27/10 16:24 / kbh <br />TDS Balance (0.80 - 1.20) 1.07 Calculation 09/27/10 16:24 / kbh <br />FIELD PARAMETERS <br />Conductivity 320 umhos/cm FIELD 08/24/10 16:03 / <br />pH 7.95 s.u. FIELD 08/24/10 16:03 <br />Temperature 16.1 °C FIELD 08/24/1016:03 <br />""' Performed by Sampler <br />Report RL - Analyte reporting limit. <br />Definitions: QCL - Quality control limit. <br />MDC - Minimum detectable concentration <br />U - Not detected at minimum detectable concentration <br />MCL - Maximum contaminant level. <br />ND - Not detected at the reporting limit. <br />D - RL increased due to sample matrix. <br />Page 8 of 44