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www.energy[ab.com Helena, MT 877-472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />Ans"Calfrceb weSIM 1852 Gillette, WY 866-686-7175 • Rapid City, SO 888-672-1225 • College 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-Discharge <br />Analyte Count Result Units <br />Method: E903.0 <br />Sample ID: 010120853-001CMS Sample Matrix Spike <br />Radium 226 14 pCi/L <br />Sample ID: C1 0120853-001 CMSD Sample Matrix Spike Duplicate <br />Radium 226 13 pCi/L <br />Sample ID: MB-RA226-5099 3 Method Blank <br />Radium 226 0.09 pCi/L <br />Radium 226 precision (±) 0.1 pCi/L <br />Radium 226 MDC 0.2 pCi/L <br />Sample ID: LCS-RA226-5099 Laboratory Control Sample <br />Radium 226 8.0 pCi/L <br />Report Date: 01 /20/11 <br />Work Order: 010120853 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA226-5099 <br />Run: BERTHOLD 770-1110104C 01/17/11 12:11 <br />102 70 130 <br />Run: BERTHOLD 770-1110104C 01/17/11 12:11 <br />95 70 130 6.1 27.9 <br />Run: BERTHOLD 770-1110104C 01/17/11 13:46 <br />U <br />Run: BERTHOLD 770-1110104C 01/17/11 13:46 <br />126 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 5 of 9