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vrWW.**W&b.cam <br />;?NZ <br />124111 • Billings, MT 800-7354419 • Casper,WY888-235-1513 <br />;!:Rapid City, 5o 118-672-1225 - cdiege station, TX 811-611-2218 <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: RA-05 <br />Sample ID: LCS-228-RA226-5022 Laboratory Control Sample <br />Radium 228 6.2 pCi/L <br />Sample ID: MB-RA226-5022 3 Method Blank <br />Radium 228 -0.08 pCi/L <br />Radium 228 precision (±) 0.5 pCi/L <br />Radium 228 MDC 0.8 pCi/L <br />Sample ID: C10110487-001DMS Sample Matrix Spike <br />Radium 228 15 pCi/L <br />Sample ID: C10110487-001 DMSD Sample Matrix Spike Duplicate <br />Radium 228 15 pCi/L <br />Report Date: 12/17/10 <br />Work Order: C10110468 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA228-3503 <br />Run: TENNELEC-3_101119E 11/30/10 15:37 <br />87 70 130 <br />Run: TENNELEC-3_101119E 11/30/10 15:37 <br />U <br />Run: TENNELEC-3_101119E 11/30/10 15:37 <br />87 70 130 <br />Run: TENNELEC-3_101119E 11/30/10 15:37 <br />85 70 130 1.2 30.6 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration U - Not detected at minimum detectable concentration <br />Page 19 of 23