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• E q-- www.vwgyiab.com Helena, MT 877 -472 -0711 • Billings, MT 808 -735 -4489 • Casper, WY 888- 235 -8515 <br />Gillette, WY 866 -666 -7175 • Rapid City, SD 886- 672 -1225 • College Station, TX 888- 690 -2216 <br />• <br />OA QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 06/18/13 <br />Project: Schwartz GW 5/15/2013 S26920 & S26921 Work Order: 013050697 <br />Analyte Count Result Units RL ° /.REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226 -6649 <br />Sample ID: C13050697 -001 EMS Sample Matrix Spike Run: BERTHOLD 770- 1_130522B 05/29/13 11:31 <br />Radium 226 19 pCi /L 81 70 130 <br />Sample ID: C13050697 -001 EMSD Sample Matrix Spike Duplicate <br />Radium 226 22 pCi /L <br />Sample ID: MB- RA226 -6649 <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />Sample ID: LCS -RA226 -6649 <br />Radium 226 <br />3 Method Blank <br />-0.05 pCi /L <br />01 pCi /L <br />0.2 pCi /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Laboratory Control Sample <br />13 pCi /L <br />Run: BERTHOLD 770- 1_130522B 05/29/13 13:10 <br />94 70 130 15 22.8 <br />Run: BERTHOLD 770- 1_130522B 05/29/13 13:10 <br />U <br />Run: BERTHOLD 770- 1_130522B 05/29/13 13:10 <br />113 80 120 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 20 of 24 <br />