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www.ener6ebtom 41,877=472-0711 • Billings, AfT 800-785-4419 - Casper, WY888-285.1513 <br />AWO" SAM IM d x,7175 ? RApld City' S0 8118-672-1225 - College Station, TX 88"10-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 04/20/11 <br />Project: Schwartz-SW 3/22/11 S25636-S25643 Work Order: C11030702 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: RA-05 Batch: RA228-3649 <br />Sample ID: LCS-228-RA226-5261 Laboratory Control Sample Run: TENNELEC-3_110327C 04/05/11 11:16 <br />Radium 228 8.3 pCi/L 114 80 120 <br />Sample ID: MB-RA226-5261 3 Method Blank Run: TENNELEC-3_110327C 04/05/11 11:16 <br />Radium 228 0.4 pCi/L U <br />Radium 228 precision (±) 0.8 pCi/L <br />Radium 228 MDC 1 pCi/L <br />Sample ID: 011030702-007FMS Sample Matrix Spike Run: TENNELEC-3_110327C 04/05/11 11:16 <br />Radium 228 14 pCi/L 100 70 130 <br />Sample ID: 011030702-007FMSD Sample Matrix Spike Duplicate Run: TENNELEC-3_110327C 04/05/11 11:16 <br />Radium 228 16 pCi/L 117 70 130 16 38.9 <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 27 of 38