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www.en*W8b M <br />Ari60tcatfitMFN=S6stra M <br />1711 • Billings, AT 811110-735-441111 - Casper, Wr 68a-235-MIS <br />piAc4, SD 816472-1225 • Coke Sfat on, nc aae-691-2216 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 04/15/11 <br />Project: Schwartz-SW 03/16/11 S25593-25600 Work Order: C11030585 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226-5254 <br />Sample ID: C11030553-003CMS Sample Matrix Spike Run: BERTHOLD 770-1_ 110322A 03/28/11 21:47 <br />Radium 226 13 pCi/L 102 70 130 <br />Sample ID: C11030553-003CMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770-1_ 110322A 03/28/11 21:47 <br />Radium 226 15 pCi/L 120 70 130 17 26.2 <br />Sample ID: MB-RA226-5254 3 Method Blank Run: BERTHOLD 770-1 110322A 03/29/11 02:11 <br />Radium 226 -0.09 pCi/L U <br />Radium 226 precision (±) 0.08 pCi/L <br />Radium 226 MDC 0.2 pCi/L <br />Sample ID: LCS-RA226-5254 Laboratory Con trol Sample Run: BERTHOLD 770-1_ 110322A 03/29/11 02:11 <br />Radium 226 6.0 pCi/L 96 85 115 <br />Method: E903.0 <br />Sample ID: C1103057"01GMS <br />Radium 226 <br />Sample ID: 011030578-001GMSD <br />Radium 226 <br />Sample ID: MB-RA226-5255 <br />Radium 226 <br />Radium 226 precision (±) <br />Radium 226 MDC <br />Sample ID: LCS-RA226-5255 <br />Radium 226 <br />Sample Matrix Spike <br />14 pCi/L <br />Sample Matrix Spike Duplicate <br />13 pCi/L <br />3 Method Blank <br />0.2 pCi/L <br />0.1 pCi/L <br />0.1 pCi/L <br />Laboratory Control Sample <br />6.4 pCi/L <br />Batch: RA226-5255 <br />Run: TENNELEC-3_110323E 04/04/11 16:43 <br />105 70 130 <br />Run: TENNELEC-3_110323E 04/04/11 16:43 <br />98 70 130 6.3 24.4 <br />Run: TENNELEC-3_110323E 04/04/11 16:43 <br />Run: TENNELEC-3_110323E 04/04/11 16:43 <br />97 85 115 <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 39 <br />