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www.enerdab.com <br />c Ans"col fxee9ence Since 1931 <br />.- <br />aaa_c; _t99R a cenoao stntinn_ TX BBB-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Proiect: Schwartzwalder Water Monitoring Program-Discharge <br />Report Date: 12/28/10 <br />Work Order: C10120059 <br />nnalvte Count Result Units <br />RL %aREC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 <br />Sample ID: C10120059-OOIAMS Sample Matrix Spike <br />Radium 226 19 pCi/L <br />Sample ID: C10120059-001AMSD Sample Matrix Spike Duplicate <br />Radium 226 19 pCi/L <br />Sample ID: MB-RA226-5050 3 Method Blank <br />Radium 226 -0.1 pCi/L <br />Radium 226 precision (±) 0.08 pCi/L <br />Radium 226 MDC 0.2 pCi/L <br />Sample ID: LCS-RA226-5050 Laboratory Control Sample <br />Radium 226 8.7 pCi/L <br />baicn: mmeeo-ovvv <br />Run: BERTHOLD 770-2_101208A 12/20/10 11:54 <br />119 70 130 <br />Run: BERTHOLD 770-2_101208A 12/20/10 11:54 <br />115 70 130 3.7 23.7 <br />Run: BERTHOLD 770-2_101208A 12/20/10 13:26 <br />U <br />Run: BERTHOLD 770-2_101208A 12/20/10 13:26 <br />111 70 130 <br />(qualifiers: <br />RL - Analyte reporting limit. ND -Not detected at the reporting limit. <br />U Not detected at minimum detectable concentration <br />MDC - Minimum detectable concentration <br />Page 4 of 8