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• www.enerdab.com Helena, MT 611472 -0711 • Billings, MT 800- 735 -4489 • Casper, WY 888- 235 -0515 <br />ry AwlylCa11'.reabm Slaw 1851 f _ Gillette, WY 866 -686 -7175 • Rapid City, SD 888 - 672 -1225 • College Station, TX 868- 690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz GW 1/22/13 SSTF: S26783 <br />Analyte Count Result Units <br />Method: E903.0 <br />Sample ID: 013010704 -002DMS <br />Sample Matrix Spike <br />Radium 226 <br />14 pCi /L <br />Sample ID: C13010704 -002DMSD <br />Sample Matrix Spike Duplicate <br />Radium 226 <br />14 pCi /L <br />Sample ID: MB- RA226 -6486 <br />3 Method Blank <br />Radium 226 <br />-0.1 pCi /L <br />Radium 226 precision ( ±) <br />0.1 pCi /L <br />Radium 226 MDC <br />0.2 pCi /L <br />Sample ID: LCS- RA226 -6486 <br />Laboratory Control Sample <br />Radium 226 <br />6.7 pCi /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Report Date: 02/06/13 <br />Work Order: C13010694 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA226 -6486 <br />Run: BERTHOLD 770-1130124A 01/30/13 06:28 <br />106 70 130 <br />Run: BERTHOLD 770-1130124A 01/30/13 06:28 <br />113 70 130 5.0 26.5 <br />Run: BERTHOLD 770-1130124A 01/30/13 08:29 <br />U <br />Run: BERTHOLD 770-1130124A 01/30/13 08:29 <br />108 80 120 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 16 of 19 <br />