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Trust our People.Trust our Data. Billings, MT 800.735.4489 • Casper. WY 888.235.0515 <br />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 />Project: Schwartz - GW 5/1/15 S27887 <br />Analyte <br />Count Result <br />Units <br />Method: E903.0 <br />Lab ID: MB-RA226-7649 <br />3 Method Blank <br />Radium 226 <br />-0.04 <br />pCi/L <br />Radium 226 precision (t) <br />0.10 <br />pCi/L <br />Radium 226 MDC <br />0.2 <br />pCi/L <br />Lab ID: LCS-RA226-7649 <br />Laboratory Control <br />Sample <br />Radium 226 <br />9.2 <br />pCi/L <br />Lab ID: C15050082-001HMS <br />Sample Matrix Spike <br />Radium 226 <br />19 <br />pCi/L <br />Lab ID: C15050082-001HMSD Sample Matrix Spike Duplicate <br />Radium 226 <br />19 <br />pCi/L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Report Date: 05/26/15 <br />Work Order: C15050075 <br />RL %aREC Low Limit High Limit RPD RPDLimit Clual <br />Batch: RA226-7649 <br />Run: BERTHOLD 770-2150507B 05/18/15 08:14 <br />U <br />Run: BERTHOLD 770-2_150507B <br />90 80 120 <br />Run: BERTHOLD 770-2_150507B <br />91 70 130 <br />Run: BERTHOLD 770-2_150507B <br />89 70 130 2.0 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />05/18/15 08:14 <br />05/18/15 10:17 <br />05/18/15 10:17 <br />49.6 <br />Page 8 of 13 <br />