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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 7/01/15 S27975 <br />Analyte Count Result Units <br />Method: RA -05 <br />Lab ID: LCS-228-RA226-7736 <br />Radium 228 <br />Lab ID: MB-RA226-7736 <br />Radium 228 <br />Radium 228 precision (t) <br />Radium 228 MDC <br />Lab ID: C15070119-001AMS <br />Radium 228 <br />Lab ID: C15070119-001AMSD <br />Radium 228 <br />Laboratory Control Sample <br />5.8 <br />pCi/L <br />3 Method Blank <br />-0.6 <br />pCi/L <br />0.7 <br />pCi/L <br />1 <br />pCi/L <br />Sample Matrix Spike <br />14 <br />pCi/L <br />Sample Matrix Spike Duplicate <br />13 <br />pCi/L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Report Date: 07/24/15 <br />Work Order: C15070092 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA228-4991 <br />Run: TENNELEC-3 150708B 07/14/15 12:25 <br />105 80 120 <br />Run: TENNELEC-3_150708B 07/14/15 12:25 <br />U <br />Run: TENNELEC-3 150708B 07/14/15 12:25 <br />113 70 130 <br />Run: TENNELEC-3 150708B 07/14/15 12:25 <br />105 70 130 8.0 57.3 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 9 of 13 <br />