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TA"720- www.energylab.com Helena, MT 677-472-0711 • Billings, MT 000-735-4489 • Casper, WY 888-235-0515 <br />L.J ,wstaa 1?t Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program <br />Report Date: 08/15/10 <br />Work Order: C10070865 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226-4685 <br />Sample ID: 010070865-001DMS Sample Matrix Spike Run: BERTHOLD 770-2_100727A 08/03/10 15:32 <br />Radium 226 20 pCi/L 116 70 130 <br />Sample ID: C10070865-001DMSD <br />Radium 226 <br />Sample ID: MB-RA226-4685 <br />Radium 226 <br />Radium 226 precision (±) <br />Radium 226 MDC <br />Sample ID: LCS-RA226-4685 <br />Radium 226 <br />Sample Matrix Spike Duplicate <br />20 pCi/L <br />3 Method Blank <br />-0.2 pCi/L <br />0.08 pCi/L <br />0.2 pCi/L <br />Laboratory Control Sample <br />7.8 pCi/L <br />Run: BERTHOLD 770-2_100727A 08/03/10 15:32 <br />119 70 130 2 20.3 <br />Run: BERTHOLD 770-2_100727A 08/03/10 23:19 <br />U <br />Run: BERTHOLD 770-2_100727A 08/03/10 23:19 <br />101 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 19 of 25