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www.energylab.com Helena, MT B77-472-0711 + Billings, MT 800-735-4469 + Casper, 41"f 888-235-051 <br />Gillette, WY 866-686-7175 • Rapid City, SD SBB-672-1225 & college station, TX 888-690-2218 <br />AaatyfltalfxcadeaceSYxe 1852 <br />w. - <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program-Discharge <br />Analyte Count Result Units <br />Method: E903.0 <br />Sample ID: C10120548-001GMS Sample Matrix Spike <br />Radium 226 12.4 pCi/L <br />Sample ID: C10120548-001GMSD Sample Matrix Spike Duplicate <br />Radium 226 13.9 pCi/L <br />Sample ID: MB-RA226-5071 3 Method Blank <br />Radium 226 -0.057 pCi/L <br />Radium 226 precision (±) 0.10 pCi/L <br />Radium 226 MDC 0.21 pCi/L <br />Sample ID: LCS-RA226-5071 Laboratory Control Sample <br />Radium 226 7.4 pCi/L <br />Report Date: 01 /12/11 <br />Work order: C10120539 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA226-5071 <br />Run: BERTHOLD 770-2_101220C 01/03/11 10:41 <br />97 70 130 <br />Run: BERTHOLD 770-2_101220C 01/03/11 10:41 <br />108 70 130 11 28.1 <br />Run: BERTHOLD 770-2_101220C 01/03/11 12:19 <br />U <br />Run: BERTHOLD 770-2_101220C 01/03/11 12:19 <br />118 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 4 of 8