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� Trust our People. Trust our Data. Billings, MT 800.735.4489 • Casper, WY 888.235.0515 <br />l`C College Station. TX 888.690.2218 • Gillette. WY 866.686.7175 • Helena, M1877,472.0711 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz -GW 3/27/15 S28168,S28169 <br />Analyte <br />Count Result <br />Units <br />Method: E900.0 <br />Lab ID: Th230-GrAB-1991 <br />Laboratory Control <br />Sample <br />Gross Alpha <br />133 <br />pCi/L <br />Lab ID: Sr90-GrAB-1991 <br />Laboratory Control <br />Sample <br />Gross Beta <br />189 <br />pCi/L <br />Lab ID: MB-GrAB-1991 <br />6 Method Blank <br />Gross Alpha <br />0.09 <br />pCi/L <br />Gross Alpha precision (±) <br />0.7 <br />pCi/L <br />Gross Alpha MDC <br />1 <br />pCi/L <br />Gross Beta <br />-1.0 <br />pCi/L <br />Gross Beta precision (±) <br />2 <br />pCi/L <br />Gross Beta MDC <br />3 <br />pCi/L <br />Lab ID: C15030678-00lDDUP <br />6 Sample Duplicate <br />Gross Alpha <br />68.8 <br />pCi/L <br />Gross Alpha precision (±) <br />13.9 <br />pCi/L <br />Gross Alpha MDC <br />1.52 <br />pCi/L <br />Gross Beta <br />18.1 <br />pCi/L <br />Gross Beta precision (±) <br />2.31 <br />pCi/L <br />Gross Beta MDC <br />2.63 <br />pCi/L <br />Lab ID: C15030880-002DMS <br />Sample Matrix Spike <br />Gross Alpha <br />148 <br />pCi/L <br />Lab ID: 015030880-002DMS <br />Sample Matrix Spike <br />Gross Beta <br />204 <br />pCi/L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Report Date: 04/16/15 <br />Work Order: C15030895 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: GrAB-1991 <br />Run: G5000W_150401A 04/03/15 16:36 <br />99 80 120 <br />Run: G5000W_150401A 04/03/15 16:36 <br />96 80 120 <br />Run: G5000W 150401A 04/03/15 16:36 <br />U <br />U <br />Run: G5000W_150401A 04/03/15 16:36 <br />16 50.6 <br />0.4 36.3 <br />Run: G5000W_150401A 04/03/15 16:36 <br />80 70 130 <br />Run: G5000W_150401A 04/03/15 16:36 <br />101 70 130 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 12 of 17 <br />