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wwx.energylab.com Helena, W- 877-472-0711 • Billings, MT 600-735 4469 • Casper, WY 888-235-0515 <br />Mam[u- <br />MstyaYtxlEuauacaSlaci 1937 Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, T% 866-690-2218 <br />LABORATORY ANALYTICAL REPORT <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 01/18/11 <br />Project: Schwartzwalder Mine Monitoring Program-Surface Wat Collection Date: 12/09/10 11:51 <br />Lab ID: C10120398-008 DateReceived: 12/10/10 <br />Client Sample ID: SW BPL (S25509) 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 12115/10 08:31 / rdw <br />Molybdenum 0.013 mg/L 0.005 E200.8 12/28/10 01:12 / sml <br />Silver ND mg/L D 0.0002 E200.8 12/28/10 01:12 / smI <br />Thallium ND mg/L 0.0002 E200.8 12128/10 01:12 / sml <br />Uranium 0.376 mg/L 0.0002 E200.8 12/28/10 01:121 sml <br />Zinc 0.011 mg/L 0.005 E200.8 12128110 01:121 smI <br />RADIONUCLIDES - DISSOLVED <br />Radium 226 0.39 pCi/L E903.0 12/29/10 14:00 / trs <br />Radium 226 precision (±) 0.14 pCi/L E903.0 12/29/10 14:00 / trs <br />Radium 226 MDC 0.15 pCi/L E903.0 12/29/10 14:00 / trs <br />RADIONUCLIDES - TOTAL <br />Gross Alpha 304 pCi/L E900.0 12/20il0 22:38 / ep <br />Gross Alpha precision (*_) 8.3 pCi/L E900.0 12/20110 22:38 i ep <br />Gross Alpha MDC 2.8 pCi/L E900.0 12/20/10 22:38 / ep <br />Gross Beta 70.5 pCi/L E900.0 12/20/10 22:38 / ep <br />Gross Beta precision (±) 2.6 pCi/L E900.0 12/20110 22:381 ep <br />Gross Beta MDC 2.6 pCi/L E900.0 12/20/10 22:381 ep <br />Radium 226 0.62 pCi/L E903.0 12127/10 10:15 / trs <br />Radium 226 precision (±) 0.16 pCi/L E903.0 12/27/10 10:15 ; trs <br />Radium 226 MDC 0.11 pCi/L E903.0 12/27/10 10:15 / trs <br />Radium 228 0.50 pCi/L U RA-05 12/21/10 13:59i plj <br />Radium 228 precision (±) 0.57 pCi/L RA-05 12/21/10 13:59 / plj <br />Radium 228 MDC 0.91 pCi/L RA-05 12/21/10 13:59 / plj <br />DATA QUALITY <br />A/C Balance (t 5) -1.58 % Calculation 01/05/11 10:38 / kbh <br />Anions 5.63 meq/L Calculation 01/05/11 10:38 / kbh <br />Cations 5.46 meq/L Calculation 01/05/11 10:38 / kbh <br />Solids, Total Dissolved Calculated 338 mg/L Calculation 01/05111 10:38 / kbh <br />TDS Balance (0.80 - 1.20) 1.03 Calculation 01/05/11 10:38 / kbh <br />FIELD PARAMETERS <br />Conductivity 539 umhos/cm FIELD 12/09/10 11:51 / kbh <br />pH 7.98 s. u. FIELD 12/09/10 11:51 / kbh <br />Temperature 5.8 °C FIELD 12/09110 11:51 / kbh <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 D - RL increased due to sample matrix. <br />U - Not detected at minimum detectable concentration <br />Page 11 of 37