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www.energylab.com <br />kaoical Excellence Sincs 1931 <br />Helena, MT 877-472-0711 • Billings, MT 800-735-4489 * Casper, WY 888-235-0515 <br />Gillette, WY 866-688-7175 - Rapid City, S0 888-672-1225 4 College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartzwalder Mine Monitoring Program-Surface Wal <br />Analyte Count Result Units <br />Method: E903.0 <br />Sample ID: C1 01 1 078 6-001EDUP 3 Sample Duplicate <br />Radium 226 230 pCi/L <br />Radium 226 precision (±) 2.8 pCi/L <br />Radium 226 MDC 0.14 pCi/L <br />Sample ID: C1 01 1 0787-OOIDMS Sample Matrix Spike <br />Radium 226 17 pCi/L <br />Sample ID: 010110787-001 DMSD Sample Matrix Spike Duplicate <br />Radium 226 16 pCi/L <br />Sample ID: MB-RA226-5037 3 Method Blank <br />Radium 226 -0.05 pCi/L <br />Radium 226 precision (±) 0.10 pCi/L <br />Radium 226 MDC 0.2 pCi/L <br />Sample ID: LCS-RA226-5037 Laboratory Con trol Sample <br />Radium 226 8.6 pCi/L <br />Report Date: 01/05/11 <br />Work Order: C10110787 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA226-5037 <br />Run: BERTHOLD 770-1_101130A 12/07/1021:55 <br />2.4 12.4 <br />Run: BERTHOLD 770-1_101130A 12'07/10 23:36 <br />103 70 130 <br />Run: BERTHOLD 770-1_101130A 12/07/10 23:36 <br />99 70 130 4.2 24 <br />Run: BERTHOLD 770-1101130A 12/08/10 01:12 <br />U <br />Run: BERTHOLD 770-1_101130A 12/08/10 01:12 <br />110 70 130 <br />Method: E903.0 <br />Sample ID: C1 01 1 0787-002EMS Sample Matrix Spike <br />Radium 226 16 pCi/L <br />Sample ID: C10110787-002EMSD Sample Matrix Spike Duplicate <br />Radium 226 16 pCi/L <br />Sample ID: MB-RA226.5030 3 Method Blank <br />Radium 226 0.2 pCi/L <br />Radium 226 precision (+_) 0.1 pCi/L <br />Radium 226 MDC 0.1 pCi/L <br />Sample ID: LCS-RA226-5030 Laboratory Control Sample <br />Radium 226 7.7 pCi/L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum delectable concentration <br />Batch: RA226-5030 <br />Run: TENNELEC-3_1 01 123E 12108/10 08:24 <br />99 70 130 <br />Run: TENNELEC-3_101123E 12/08/10 08:24 <br />93 70 130 5.1 23.6 <br />Run: TENNELEC-3_101123E 12108/10 08:24 <br />Run: TENNELEC-3_101 123E 12/08/10 08:24 <br />95 70 130 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 23 of 30