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ENERGY <br />LABORATORIES <br />www.energylab.com <br />Analytical Excellence Seca 1957 <br />Client: Cotter Corporation <br />Project: Schwartz SW 07/19/11 S25861- S25868 <br />Method: E903.0 <br />Sample ID: C11070737- 001GMS <br />Radium 226 <br />Sample ID: 011070737 001GMSD <br />Radium 226 <br />Sample ID: MB - RA226 - 5530 <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />Sample ID: LCS - RA226 - 5530 <br />Radium 226 <br />Method: E903.0 <br />Sample ID: 011070871- 001CMS <br />Radium 226 <br />Sample ID: C1 1 070871 001CMSD <br />Radium 226 <br />Sample ID: MB - RA226 - 5533 <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />Sample ID: LCS - RA226 - 5533 <br />Radium 226 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Sample Matrix Spike <br />24.1 pCi /L <br />Sample Matrix Spike Duplicate <br />21.8 pCi /L <br />3 Method Blank <br />-0.076 <br />0.059 <br />0.15 <br />pCi /L <br />pCi /L <br />pCi /L <br />Laboratory Control Sample <br />12 pCi /L <br />Sample Matrix Spike <br />35.1 pCi /L <br />Sample Matrix Spike Duplicate <br />37.4 pCi /L <br />3 Method Blank <br />-0.034 <br />0.091 <br />0.17 <br />pCi /L <br />pCi /L <br />pCi /L <br />Laboratory Control Sample <br />13 pCi /L <br />Helena, MT 877 -472 -0111 • Billings, MT 800- 735 -4488 • Casper, WY 888 -235 -0515 <br />Gillette, WY 866 -686 -7175 • Rapid City, SD 888 -672 -1225 • College Station, TX 888 -690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Analyte <br />Count <br />Result Units <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Run: BERTHOLD 770- 2_110726A <br />91 70 130 <br />Run: BERTHOLD 770- 2_110726A 08/15/11 09:06 <br />83 70 130 10.0 21.6 <br />Run: BERTHOLD 770- 2_110726A <br />Run: BERTHOLD 770- 2_110726A 08/15/11 12:09 <br />94 85 115 <br />Run: G542M_110726A <br />95 70 130 <br />Run:G542M_110726A <br />104 70 130 <br />Run:G542M_110726A <br />Run:G542M_110726A <br />105 85 115 <br />Report Date: 08/21/11 <br />Work Order: 011070766 <br />6.4 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 26 of 38 <br />Batch: RA226 -5530 <br />08/15/11 09:06 <br />08/15/11 12:09 <br />U <br />Batch: RA226 -5533 <br />08/01/11 13:16 <br />08/01/11 13:16 <br />18.5 <br />08/01/11 13:16 <br />U <br />08/01/11 13:16 <br />