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ENERGY <br />Radium 226 <br />Client: Cotter Corporation <br />Project: Schwartz GW 8/4/11 S25873- S25874 <br />Method: E903.0 <br />Sample ID: C11080330- 002EMS <br />Radium 226 <br />Sample ID: C11080330- 002EMSD Sample Matrix Spike Duplicate <br />Sample ID: MB -RA226 -5556 <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />www.enagylab.com r <br />Antilles! Enemy Saco 1152 J <br />16 pCi /L <br />3 Method Blank <br />-0.02 pCi /L <br />0.07 pCi /L <br />0.1 pCi /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Sample Matrix Spike <br />14 pCi /L <br />Sample ID: LCS -RA226 -5556 Laboratory Control Sample <br />Helena, MT 877472 - 0711 • Billings, MT 800 735 - 4489 • Casper, WY 888 - 235 - 0515 <br />Gillette, WY 866486 - 7175 • Rapid City, SO 886 672 - 1225 • College Station, TX 888 - 690 - 2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Analyte <br />Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Run: BERTHOLD 770-1_110809B <br />95 70 130 <br />Run: BERTHOLD 770-1_110809B 08/16/11 17:41 <br />107 70 130 12 24.9 <br />Run: BERTHOLD 770- 1_110809B <br />Radium 226 6.1 pCi /L 86 85 115 <br />Report Date: 09/13/11 <br />Work Order: C11080330 <br />Run: BERTHOLD 770-1_110809B 08/16/11 17:41 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Batch: RA226 -5556 <br />08/16/11 17:41 <br />Page 18 of 23 <br />08/16/11 17:41 <br />U <br />