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ENERGY <br />LABORATORIES <br />Client: Cotter Corporation <br />Project: Schwartz GW 7/26/2012 S26523 <br />Analyte Count Result Units <br />Method: E903.0 <br />Sample ID: LCS -RA226 -6179 <br />Radium 226 <br />Sample ID: MB -RA226 -6179 <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />www.energylab.com I <br />Analytical Excellence Since 1152 <br />Laboratory Control Sample <br />6.9 pCi /L <br />3 Method Blank <br />-0.02 pCi /L <br />0.1 pCi /L <br />0.2 pCi /L <br />Sample ID: C12080190 -001 DMS Sample Matrix Spike <br />Helena, MT 877 472 - 0711 • Billings, MT 800 735 - 4489 • 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 />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Run: BERTHOLD 770- 1_120814A <br />110 80 120 <br />Run BERTHOLD 770-1_120814A <br />Radium 226 13.2 pCi /L 102 70 130 <br />Report Date: 08/31/12 <br />Work Order: C12071072 <br />Run: BERTHOLD 770- 1_120814A 08/20/12 12:27 <br />Sample ID: C12080190 -001DMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770- 1_120814A 08/20/12 16:44 <br />Radium 226 12.0 pCi /L 95 70 130 8.8 25.9 <br />ND - Not detected at the reporting limit <br />U - Not detected at minimum detectable concentration <br />Batch: RA226 -6179 <br />08/20/12 10:39 <br />Page 17 of 20 <br />08/20/12 10:39 <br />U <br />