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wwwx*rgylab.eom <br />Aub"Eic hM SAM IM <br />-877-, 724711 • Billings, MT800-735-4488 • Casper,WY888-235-1513 <br />b?7115 *Rapid City, SD BIB-672-1225 • Cdlne Station,1X IS"10.2215 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz SW 02-10-11 S25580-S25582 <br />Analyte Count Result Units <br />Method: RA-05 <br />Sample ID: LCS-228-RA226-5194 Laboratory Control Sample <br />Radium 228 7.1 pCi/L <br />Sample ID: MB-RA226-5194 3 Method Blank <br />Radium 228 0.2 pCi/L <br />Radium 228 precision (±) 1.0 pCi/L <br />Radium 228 MDC 2 pCi/L <br />Sample ID: C1 1020476-001 GMS Sample Matrix Spike <br />Radium 228 18 pCi/L <br />Sample ID: C11020476-001GMSD Sample Matrix Spike Duplicate <br />Radium 228 17 pCi/L <br />Report Date: 03/15/11 <br />Work Order: 011020376 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA228-3610 <br />Run: TENNELEC-3-110225C 03/07/11 11:23 <br />99 80 120 <br />Run: TENNELEC-3_110225C 03/07/11 11:23 <br />U <br />Run: TENNELEC-3 110225C 03/07/11 11:23 <br />116 70 130 <br />Run: TENNELEC-3-110225C 03/07/11 11:23 <br />109 70 130 5.7 30.9 <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 23 of 29