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ENERGY <br />A OPAiCF4i ==, <br />Client: Cotter Corporation <br />www.energylab.com <br />Aaa+yf cal&nan . lines 1852 <br />J <br />Project: Schwartz SW 7/19/2012 S26537- S26538 Work Order: C12070746 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 <br />Sample ID: C12070746- 002CMS <br />Radium 226 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Sample Matrix Spike <br />16 pCi /L <br />Sample ID: LCS -RA226 -6137 Laboratory Control Sample <br />Helena, MT 877 - 472 -0711 • Billings, MT 800 - 735 -4489 • Caspar, 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 />Radium 226 6.1 pCi /L 99 80 120 <br />Report Date: 08/22/12 <br />Batch: RA226 -6137 <br />Run: BERTHOLD 770- 2_120730A 08/06/12 23:16 <br />111 70 130 <br />Sample ID: C12070746- 002CMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770- 2_120730A 08/06/12 23:16 <br />Radium 226 16 pCi /L 109 70 130 0.5 24.5 <br />Sample ID: MB -RA226 -6137 3 Method Blank Run: BERTHOLD 770- 2_120730A 08/07/12 00:56 <br />Radium 226 -0.1 pCi /L U <br />Radium 226 precision ( ±) 0.07 pCi /L <br />Radium 226 MDC 0.2 pCi /L <br />Run: BERTHOLD 770- 2_120730A 08/07/12 00:56 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 5 of 9 <br />