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•� • Trust our People. Trust our Data. Billings, MT 800.735.4489 • Casper, WY 888.235.0515 <br />E 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 -SW 4/02/15 S27828 <br />Analyte Count Result Units <br />Method: RA -05 <br />Lab ID: LCS-228-RA226-7609 <br />Laboratory Control Sample <br />Radium 228 <br />5.4 pCi/L <br />Lab ID: MB-RA226-7609 <br />3 Method Blank <br />Radium 228 <br />0.06 pCi/L <br />Radium 228 precision (f) <br />0.6 pCi/L <br />Radium 228 MDC <br />1 pCi/L <br />Lab ID: C15040116-002AMS <br />Sample Matrix Spike <br />Radium 228 <br />13.1 pCi/L <br />Lab ID: 015040116-002AMSD <br />Sample Matrix Spike Duplicate <br />Radium 228 <br />13.5 pCi/L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Report Date: 04/23/15 <br />Work Order: C15040126 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA228-4908 <br />Run: TENNELEC-3_150407A 04/14/15 12:01 <br />85 80 120 <br />Run: TENNELEC-3 150407A <br />Run: TENNELEC-3_150407A <br />93 70 130 <br />Run:TENNELEC-3_150407A <br />96 70 130 3.3 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />04/14/15 12:01 <br />U <br />04/14/15 12:01 <br />04/14/15 12:01 <br />52.1 <br />Page 19 of 23 <br />