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www-plodeb.com Helena, Mt Off-41Z-Ul 11 0 51111n$S, MI 6YY-139--mou I L AMM, "I VVV V-VV 1 V <br />Aa>t f se 1831 Gillette, HAY 866-686-7175 • Rapid City, SO 888-672-1225 • College Station, YX 888-690-2218 <br />LABORATORY ANALYTICAL REPORT <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 04/19/11 <br />Project: Schwartz GW 3/24/11 S25646 & S25647 Collection Date: 03/24/11 09:20 <br />Lab ID: C1 1030817-001 DateReceived: 03/28/11 <br />Client Sample ID: Mine Refill Water (S25646) Matrix: Aqueous <br />MCL/ <br />Analyses Result Units Qualifiers RL QCL Method Analysis Date / By <br />RADIONUCLIDES - DISSOLVED <br />Radium 226 208 pCi/L E903.0 04/06/11 21:14 / ep <br />Radium 226 precision (±) 2.3 pCi/L E903.0 04/06/11 21:14 / ep <br />Radium 226 MDC 0.08 pCi/L E903.0 04/06/11 21:14 / ep <br />RADIONUCLIDES - TOTAL <br />Gross Alpha 38100 pCi/L E900.0 04/07/11 13:36 / ep <br />Gross Alpha precision (±) 248 pCi/L E900.0 04/07/11 13:36 / ep <br />Gross Alpha MDC 18.4 pCi/L E900.0 04/07/11 13:36 / ep <br />Gross Beta 9730 pCi/L E900.0 04/07/11 13:36 / ep <br />Gross Beta precision (±) 60.5 pCi/L E900.0 04/07/11 13:36 / ep <br />Gross Beta MDC 16.2 pCi/L E900.0 04/07/11 13:36 / ep <br />DATA QUALITY <br />A/C Balance (± 5) -1.20 % Calculation 04/07/11 12:37 / kbh <br />Anions 46.5 meq/L Calculation 04/07/11 12:37 / kbh <br />Cations 45.4 meq/L Calculation 04/07/11 12:37 / kbh <br />Solids, Total Dissolved Calculated 2900 mg/L Calculation 04/07/11 12:37 / kbh <br />TDS Balance (0.80 - 1.20) 1.11 Calculation 04/07/11 12:37 / kbh <br />FIELD PARAMETERS <br />Conductivity 3360 umhos/cm FIELD 03/24/11 09:20 / <br />Flow 1.81 gpm FIELD 03/24/11 09:20 / <br />pH 7.13 s.u. FIELD 03/24/11 09:20 / <br />Temperature 12.3 °C FIELD 03/24/11 09:20 / <br />"' Performed by Sampler <br />Report RL - Analyte reporting limit. <br />Definitions: QCL - Quality control limit. <br />MDC - Minimum detectable concentration <br />MCL - Maximum contaminant level. <br />ND - Not detected at the reporting limit. <br />Page 4 of 26