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OE Trust our People. Tr ust our Data. Billings, MT 800.735.4489 • Casper, WY 888.235.0515 <br />l College Station. TX 888.690.2218 • Gillette, WY 866.686.7175 • Helena, MT 877.472.0711 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Report Date: <br />05/07/15 <br />Project: Schwartz - GW 4/14/15 <br />S27854, S27857 <br />Work Order: <br />C15040486 <br />Analyte Count Result <br />Units <br />RL %REC Low Limit High Limit <br />RPD <br />RPDLimit Qual <br />Method: E903.0 <br />Batch: RA226-7631 <br />Lab ID: MB-RA226-7631 <br />3 Method Blank <br />Run: BERTHOLD 770-1150422A <br />04/28/15 06:38 <br />Radium 226 <br />-0.07 <br />pCi/L <br />U <br />Radium 226 precision (t) <br />0.08 <br />pCi/L <br />Radium 226 MDC <br />0.2 <br />pCi/L <br />Lab ID: LCS-RA226-7631 <br />Laboratory Control <br />Sample <br />Run: BERTHOLD 770-1_150422A <br />04/28/15 06:38 <br />Radium 226 <br />9.6 <br />pCi/L <br />94 80 120 <br />Lab ID: C15040557-001GMS <br />Sample Matrix Spike <br />Run: BERTHOLD 770-1_150422A <br />04/28/15 08:36 <br />Radium 226 <br />19 <br />pCi/L <br />88 70 130 <br />Lab ID: C15040557-001GMSD <br />Sample Matrix Spike Duplicate <br />Run: BERTHOLD 770-1_150422A <br />04/28/15 08:36 <br />Radium 226 <br />20 <br />pCi/L <br />93 70 130 <br />4.6 <br />49.4 <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 24 of 30 <br />