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www.e vdab.wm Helena, MT 877472-0711 • Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />DIXteat F Gillette, WY 866-686-7175 • Rapid city, so 888-672-1225 • college station, Tx 888-Ull-2216 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz SW02-03-11 S25602-S25608 <br />Analyte Count Result Units <br />Method: RA-05 <br />Sample ID: LCS-228-RA226-5178 Laboratory Control Sample <br />Radium 228 7.8 pCi/L <br />Sample ID: MB-RA226-5178 3 Method Blank <br />Radium 228 0.15 pCi/L <br />Radium 228 precision (±? 0.95 pCi/L <br />Radium 228 MDC 1.6 pCi/L <br />Sample ID: C11020127-004AMS Sample Matrix Spike <br />Radium 228 17 pCi/L <br />Sample ID: 011020127-004AMSD Sample Matrix Spike Duplicate <br />Radium 228 15 pCi/L <br />Report Date: 03/04/11 <br />Work Order: C11020189 <br />RL %REC Low Limit High Limit RPD RPDLimit Oual <br />Batch: RA228-3601 <br />Run: TENNELEC-3_110211D 02/22/1115:34 <br />108 80 120 <br />Run: TENNELEC-3_110211D 02/22/1115:34 <br />U <br />Run: TENNELEC-3_110211 D 02/22/11 15:34 <br />98 70 130 <br />Run: TENNELEC-3_110211 D 02/22/11 15:34 <br />85 70 130 12 37.8 <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 27 of 37