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• ?• www.energylab.com Helena, MT B77-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />- «- - Aas" alfxc°Ua+rs 9we I-W Gillette, wy 866-686-7175 • Rapid City, SD 888-672-1225 • College station, Tx 888-690-2218 <br />LABORATORY ANALYTICAL REPORT <br />Client: Cotter Corporation Report Date: 09/27/10 <br />Project: Schwartzwalder Mine Collection Date: 08/25/10 09:05 <br />Lab ID: C10080962-005 DateReceived: 08/26/10 <br />Client Sample ID: SW-OS (S25181) 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 09/07/10 13:26 / sml <br />Silver ND mg/L 0.001 E200.8 09/07/10 13:26 / sml <br />Thallium ND mg/L 0.001 E200.8 09/07/10 13:26 / sml <br />Uranium 0.0054 mg/L 0.0002 E200.8 09/07/10 13:26 / sml <br />Zinc ND mg/L 0.005 E200.8 09/07/10 13:26 / sml <br />RADIONUCLIDES - DISSOLVED <br />Radium 226 -0.06 pCi/L U E903.0 09/20/10 12:11 / trs <br />Radium 226 precision (±) 0.11 pCi/L E903.0 09/20/10 12:11 / trs <br />Radium 226 MDC 0.23 pCi/L E903.0 09/20/10 12:11 / trs <br />RADIONUCLIDES - TOTAL <br />Gross Alpha 3.1 pCi/L E900.0 09/10/10 03:35 / ep <br />Gross Alpha precision (±) 1.2 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 1.8 pCi/L U E900.0 09/10/10 03:35 / ep <br />Gross Beta precision (±) 1.5 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 0.05 pCi/L U E903.0 09/20/10 13:45 / trs <br />Radium 226 precision (±) 0.12 pCi/L E903.0 09/20/10 13:45 / trs <br />Radium 226 MDC 0.20 pCi/L E903.0 09/20/10 13:45 / trs <br />Radium 228 1.3 pCi/L U RA-05 09/13/10 11:42 / plj <br />Radium 228 precision (±) 0.85 pCi/L RA-05 09/13/10 11:42 / plj <br />Radium 228 MDC 1.3 pCi/L RA-05 09/13/10 11:42 / plj <br />DATA QUALITY <br />A/C Balance (± 5) -2.37 % Calculation 09/27/10 16:24 / kbh <br />Anions 3.36 meq/L Calculation 09/27/10 16:24 / kbh <br />Cations 3.21 meq/L Calculation 09/27/10 16:24 / kbh <br />Solids, Total Dissolved Calculated 194 mg/L Calculation 09/27/10 16:24 / kbh <br />TDS Balance (0.80 - 1.20) 1.09 Calculation 09/27/10 16:24 / kbh <br />FIELD PARAMETERS <br />Conductivity 329 umhos/cm FIELD 08/25/10 09:05 / <br />pH 7.48 s.u. FIELD 08/25/10 09:05 / <br />Temperature 12.6 °C FIELD 08/25/10 09:05 / <br />"' Performed by Sampler <br />Report RL - Analyte reporting limit. <br />Definitions: OCL - Quality control limit. <br />MDC - Minimum detectable concentration <br />MCL - Maximum contaminant level. <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 10 of 44