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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 />Report Date: <br />04/23/15 <br />Project: Schwartz -SW 4/02/15 S27828 <br />Work Order: <br />C15040126 <br />Analyte Count Result Units <br />RL %REC <br />Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: E903.0 <br />Batch: RA226-7609 <br />Lab ID: MB-RA226-7609 <br />3 Method Blank <br />Run: BERTHOLD 770-2150407A <br />04/20/15 08:01 <br />Radium 226 <br />-0.1 pCi/L <br />U <br />Radium 226 precision (t) <br />0.07 pCi/L <br />Radium 226 MDC <br />0.2 pCi/L <br />Lab ID: LCS-RA226-7609 <br />Laboratory Control Sample <br />Run: BERTHOLD 770-2_150407A <br />04/20/15 08:01 <br />Radium 226 <br />10 pCi/L <br />98 <br />80 120 <br />Lab ID: C15040109-001AMS <br />Sample Matrix Spike <br />Run: BERTHOLD 770-2_150407A <br />04/20/15 08:01 <br />Radium 226 <br />20 pCi/L <br />97 <br />70 130 <br />Lab ID: 015040109-001AMSD <br />Sample Matrix Spike Duplicate <br />Run: BERTHOLD 770-2_150407A <br />04/20/15 08:01 <br />Radium 226 <br />20 pCi/L <br />94 <br />70 130 2.4 <br />49.3 <br />Method: E903.0 <br />Batch: RA226-7610 <br />Lab ID: MB-RA226-7610 <br />3 Method Blank <br />Run: BERTHOLD 770-2150408A <br />04/14/15 12:06 <br />Radium 226 <br />0.03 pCi/L <br />U <br />Radium 226 precision (t) <br />0.10 pCi/L <br />Radium 226 MDC <br />0.2 pCi/L <br />Lab ID: LCS-RA226-7610 <br />Laboratory Control Sample <br />Run: BERTHOLD 770-2_150408A <br />04/14/15 12:06 <br />Radium 226 <br />8.6 pCi/L <br />83 <br />80 120 <br />Lab ID: C15040149-001GMS <br />Sample Matrix Spike <br />Run: BERTHOLD 770-2_150408A <br />04/14/15 12:06 <br />Radium 226 <br />17 pCi/L <br />80 <br />70 130 <br />Lab ID: C15040149-001GMSD <br />Sample Matrix Spike Duplicate <br />Run: BERTHOLD 770-2_150408A <br />04/14/15 12:06 <br />Radium 226 <br />15 pCi/L <br />70 <br />70 130 13 <br />49.6 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 18 of 23 <br />