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ENERGY <br />' AORATORIFS <br />www.energ 1ab.com <br />Ae Oxen= Nan 1&tt <br />Client: Cotter Corporation <br />Project: Schwartz GW 6/23/11 S25850 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 <br />Sample ID: C11060975- 001AMS <br />Radium 226 <br />Radium 226 <br />Sample Matrix Spike <br />60.0 pCi /L <br />Sample ID: 011060975- 001AMSD Sample Matrix Spike Duplicate <br />60.6 pCi /L <br />Sample ID: C11060975- 003ADUP 3 Sample Duplicate <br />Radium 226 69.0 pCi /L <br />Radium 226 precision ( ±) 1.75 pCi /L <br />Radium 226 MDC 0.133 pCi /L <br />Sample ID: MB - RA226 - 5457 <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />3 Method Blank <br />0.06 pCi /L <br />0.09 pCi /L <br />0.1 pCi /L <br />Sample ID: LCS -RA226 -5457 Laboratory Control Sample <br />Helena, MT 877- 472 -0711 • Billings, MT 800- 795 -4489 • Casper, WY 888 - 295 -0513 <br />Gillette, WY 866 -688 -7175 • Rapid City, SD 88B- 672 -1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Run: BERTHOLD 770-2_110628A <br />101 70 130 <br />Run: BERTHOLD 770- 2_110628A 07/05/11 13:30 <br />104 70 130 0.9 18.6 <br />Run: BERTHOLD 770-2_110628A <br />3.2 <br />Run: BERTHOLD 770-2_110628A <br />Radium 226 11 pCi /L 86 85 115 <br />Report Date: 07/22/11 <br />Work Order: C11061003 <br />Run: BERTHOLD 770-2_110628A 07/05/11 17:33 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Batch: RA226 -5457 <br />07/05/11 13:30 <br />Page 17 of 21 <br />07/05/11 15:26 <br />15.1 <br />07/05/11 17:33 <br />U <br />