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www.dweabtom Helens, NT 877-472-0711 - 61111ngs, W 800-735-4188 - Casper, wY 888-235-0515 <br />A.d"ftCae MAM test Gillette; wY 866-686-7175 - Rapid City, SD 886-672-1225 - College Station, TX 888-600-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz-SW 3/10/2011 S25686-S25688 <br />Analyte Count Result Units <br />Method: RA-05 <br />Sample ID: LCS-228-RA226-5247 Laboratory Control Sample <br />Radium 228 7.1 pCi/L <br />Sample ID: MB-RA226-5247 3 Method Blank <br />Radium 228 0.32 pCi/L <br />Radium 228 precision (±? 0.67 pCi/L <br />Radium 228 MDC 1.1 pCi/L <br />Sample ID: 011030474-001 DMS Sample Matrix Spike <br />Radium 228 15 pCi/L <br />Sample ID: C1 1030474-001 DMSD Sample Matrix Spike Duplicate <br />Radium 228 14 pCi/L <br />Report Date: 04/11 /11 <br />Work Order: C11030378 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA228-3642 <br />Run: TENNELEC-3_110318D 03/29/11 12:00 <br />98 80 120 <br />Run: TENNELEC-3_110318D 03/29/11 12:00 <br />U <br />Run: TENNELEC-3_110318D 03/29/11 12:00 <br />96 70 130 <br />Run: TENNELEC-3_110318D 03/29/11 12:00 <br />88 70 130 7.1 31.5 <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