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wvm.energylab.com Helena, MT 877.472-0711 - Billings, MT 800-735-4489 - Casper, WY 888-235-0515 <br />., `• AnWicalEmallaaceSWcs 1951 J Gillette, WY 866-686.7175 - Rapid CHy, SO B88-672-1225 + Collage Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program - Groundwa <br />Analyte Count Result Units <br />Method: E903.0 <br />Sample ID: C1 0110786-001 EDUP 3 Sample Duplicate <br />Radium 226 230 pCi/L <br />Radium 226 precision (t) 2.8 pCi/L <br />Radium 226 MDC 0.14 pCVL <br />Sample ID: C10110787-001DMS Sample Malrix Spike <br />Radium 226 17 pCi/L <br />Sample ID: C10110787-OD1 DMSD Sample Matrix Spike Duplicate <br />Radium 226 16 pCUL <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 Control Sample <br />Radium 226 8.6 pCi/L <br />Report Date: 12/22110 <br />Work Order: 010110786 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Balch: RA226-5037 <br />Run: BERTHOLD 770-1_101130A 12/07/10 21:55 <br />2.4 12.4 <br />Run: BERTHOLD 770-1101130A 12/07110 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 770-1101130A 12/08110 01:12 <br />110 70 130 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 18 of 29