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wwwtrkrgYlab.com <br />472-0711 • Billings, W 600.735-4488 • Casper;;WY888-235-051.5 <br />5, Rapid City, SD 888-672-1225 • College Ststim TX 888-610-2216 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 04/15/11 <br />Project: Schwartz-SW 03/16/1 1 S25593-25600 Work Order: C11030585 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: RA-05 Batch: RA228-3645 <br />Sample ID: LCS-228-RA226-5255 Laboratory Control Sample Run: TENNELEC-3_110323A 03/29/11 17:16 <br />Radium 228 7.7 pCi/L 107 80 120 <br />Sample ID: MB-RA226-5255 3 Method Blank Run: TENNELEC-3_110323A 03/29/11 17:16 <br />Radium 228 0.2 pCi/L U <br />Radium 228 precision (±) 0.8 pCi/L <br />Radium 228 MDC 1 pCi/L <br />Sample ID: C11030585-006FMS Sample Matrix Spike Run: TENNELEC-3_110323A 03/29/11 17:16 <br />Radium 228 16 pCi/L 114 70 130 <br />Sample ID: C11030585-006FMSD Sample Matrix Spike Duplicate Run: TENNELEC-3_110323A 03/29/11 17:16 <br />Radium 228 16 pCi/L 114 70 130 0.5 41.8 <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 28 of 39 <br />