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WWWO er&b.COM Helena, W 877- 472 -0711 • Billings, NIT 800 -735 -4489 • Casper, WY 888 -235 -0515 <br />� IJV Gillette, WY 866 -886 -7175 • Rapid City, SD 886- 672 -1225 • College Station, TX 888- 690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz -SW 9/10/13 S27153 to S27156 <br />Report Date: 10/08/13 <br />Work Order: C13090386 <br />Analyte Count Result Units RL 0/A9EC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 <br />Sample ID: 013090222 -001 EDUP <br />3 Sample Duplicate <br />Radium 226 <br />0.20 <br />pCi /L <br />Radium 226 precision ( ±) <br />0.11 <br />pCi /L <br />Radium 226 MDC <br />0.14 <br />pCi /L <br />Sample ID: C13090386- 004CMS <br />Sample Matrix Spike <br />Radium 226 <br />24 <br />pCi /L <br />Sample ID: MB- RA226 -6845 <br />3 Method Blank <br />Radium 226 <br />-0.003 <br />pCi /L <br />Radium 226 precision ( ±) <br />0.08 <br />pCi /L <br />Radium 226 MDC <br />0.1 <br />pCi /L <br />Sample ID: LCS- RA226 -6845 <br />Laboratory Control Sample <br />Radium 226 <br />12 <br />pCi/L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Batch: RA226 -6845 <br />Run: BERTHOLD 770-1130916B 09/24/13 15:32 <br />23 114 <br />Run: BERTHOLD 770-1130916B 09/24/13 17:13 <br />105 70 130 <br />Run: BERTHOLD 770-1130916B 09/24/13 21:58 <br />U <br />Run: BERTHOLD 770-1130916B 09/24/13 21:58 <br />108 80 120 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 7 of 13 <br />