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1 www.wwgoab.com j Helena, W 877- 472 -0711 • Billings, W 800 -735 -4469 • Casper, WY 888 - 235 -0515 <br />M**#/Ewa m 9— tlst f Gillette, WY 866 -686 -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 />Client: Cotter Corporation <br />Project: Schwartz GW 5/23/2013 S26999 & S27000 <br />Analyte <br />Count Result Units <br />Method: E903.0 <br />Sample ID: C13050907 -001 HMS <br />Sample Matrix Spike <br />Radium 226 <br />25 pCi /L <br />Sample ID: C13050907 -001 HMSD <br />Sample Matrix Spike Duplicate <br />Radium 226 <br />25 pCi /L <br />Sample ID: MB- RA226 -6663 <br />3 Method Blank <br />Radium 226 <br />0.03 pCi /L <br />Radium 226 precision ( ±) <br />0.07 pCi /L <br />Radium 226 MDC <br />0.1 pCi /L <br />Sample ID: LCS- RA226 -6663 <br />Laboratory Control Sample <br />Radium 226 <br />12 pCi /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Report Date: 06/19/13 <br />Work Order: C13050906 <br />RL ° /oREC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA226 -6663 <br />Run: BERTHOLD 770- 1_130530B 06/05/13 19:22 <br />111 70 130 <br />Run: BERTHOLD 770- 1_130530B 06/05/13 19:22 <br />109 70 130 0.9 17.9 <br />Run: BERTHOLD 770-1130530B 06/05/13 23:22 <br />U <br />Run: BERTHOLD 770- 1_130530B 06/05/13 23:22 <br />109 80 120 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 20 of 24 <br />