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• - www.ererdab.com Helena, MT 877- 472 -0711 • Billings, MT 800- 735 -4489 • Casper, WY 888- 235 -0515 <br />a <br />AUWWE=Aft sm 'N2 Gillette, WY 866 -686 -7175 • Rapid City, SD 888- 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 05/18/13 S26985 & S26986 <br />Analyte Count Result <br />Units <br />Method: E903.0 <br />Sample ID: 013050721- 001GMS <br />Sample Matrix Spike <br />Radium 226 <br />23 <br />pCi /L <br />Sample ID: C13050721- 001GMSD <br />Sample Matrix Spike Duplicate <br />Radium 226 <br />23 <br />pCi /L <br />Sample ID: MB -RA226 -6650 <br />3 Method Blank <br />Radium 226 <br />0.2 <br />pCi /L <br />Radium 226 precision ( ±) <br />0.1 <br />pCi /L <br />Radium 226 MDC <br />0.1 <br />pCi /L <br />Sample ID: LCS -RA226 -6650 <br />Laboratory Control <br />Sample <br />Radium 226 <br />12 <br />pCi /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Report Date: 06/11/13 <br />Work Order: C13050721 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA226 -6650 <br />Run: TENNELEC- 3_130522B 05/28/13 23:11 <br />100 70 130 <br />Run: TENNELEC- 3_130522B 05/28/13 23:11 <br />100 70 130 0.1 21.1 <br />Run: TENNELEC -3 130522B 05/29/13 00:57 <br />Run: TENNELEC- 3_130522B 05/29/13 00:57 <br />104 80 120 <br />ND - Not detected at the reporting limit. <br />Page 20 of 24 <br />