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wwwAnordeb.com Helena, M1877-472-0711 • Billings, W 800-135-4489 • Casper, WY BW235-0515 <br />} AnOWEM&M A a iinr J Gillette, WY 866-666-1175 • Rapid City, SD 086-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 11/30/10 <br />Project: Schwartzwalder Water Monitoring Program (S25416) Work Order: C10100814 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226-5031 <br />Sample ID: C10100875-001AMS Sample Matrix Spike Run: BERTHOLD 770-2_101124A 11/29/10 16:52 <br />Radium 226 16 pCi/L 97 70 130 <br />Sample ID: C10100875-001AMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770-2_101124A 11/29/10 16:52 <br />Radium 226 14 pCi/L 84 70 130 14 22.9 <br />Sample ID: MB-RA226-5031 3 Method Blank Run: BERTHOLD 770-2_101124A 11/29/10 16:52 <br />Radium 226 -0.09 pCi/L U <br />Radium 226 precision (±) 0.06 pCi/L <br />Radium 226 MDC 0.1 pCi/L <br />Sample ID: LCS-RA226-5031 Laboratory Control Sample Run: BERTHOLD 770-2_101124A 11/29/10 16:52 <br />Radium 226 7.5 pCi/L 96 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