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www energylab.wm <br />. ? Aatl?'tlcatFiteadEru?SrrxalgSY <br />Helena, W 677-472-0711 a Billings, MT 800-735-4489 a Casper, WY 888-235-0515 <br />Gillette, WY 866-886-7175 a Rapid City, SD 886-672-1225 a College Station. TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 11/29/10 <br />Project: Schwartzwalder Water Monitoring Program SW Work Order: C10101013 <br /> <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: RA-05 Batch: RA228-3486 <br />Sample ID: LCS-228-RA226-4992 Laboratory Control Sample Run: TENNELEC-3_10111OF 11/17/10 13:22 <br />Radium 228 6.98 pCi/L 91 70 130 <br />Sample ID: MB-RA226-4992 3 Method Blank Run: TENNELEC-3_101110F 11/17/10 13:22 <br />Radium 228 0.4 pCi/L U <br />Radium 228 precision (±) 0.6 pCi/L <br />Radium 228 MDC 1 pCi/L <br />Sample ID: C10101108-001CMS Sample Matrix Spike Run: TENNELEC-3_10111 OF 11/17/10 13:22 <br />Radium 228 17.5 pCi/L 106 70 130 <br />Sample ID: C10101108-001CMSD Sample Matrix Spike Duplicate Run: TENNELEC-3_10111 OF 11/17/10 13:22 <br />Radium 228 16.6 pCi/L 100 70 130 5.5 30 <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 25 of 32