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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 Count Result <br />Units <br />Method: RA -05 <br />Lab ID: LCS-228-RA226-7649 <br />Laboratory Control <br />Sample <br />Radium 228 <br />7.1 <br />pCi/L <br />Lab ID: MB-RA226-7649 <br />3 Method Blank <br />Radium 228 <br />-0.004 <br />pCi/L <br />Radium 228 precision (t) <br />0.6 <br />pCi/L <br />Radium 228 MDC <br />1 <br />pCi/L <br />Lab ID: C15040612-001 BMS <br />Sample Matrix Spike <br />Radium 228 <br />14.9 <br />pCi/L <br />Lab ID: C15040612-001BMSD <br />Sample Matrix Spike Duplicate <br />Radium 228 <br />16.2 <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 %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA228-4930 <br />Run: TENNELEC-3 150507B 05/13/15 09:29 <br />113 80 120 <br />Run: TENNELEC-3_150507B 05/13/15 09:29 <br />U <br />Run: TENNELEC-3_150507B 05/13/15 09:29 <br />88 70 130 <br />Run: TENNELEC-3_150507B 05/13/15 09:29 <br />98 70 130 7.9 49.9 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 9 of 13 <br />