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www.energylab.com Helena, MT 877- 472 -0711 • Billings, W 800- 735 -4489 - Casper, WY 888 - 235 -0515 <br />AmWal EWA6we AW IJU Gillette, WY 866 -686 -7175 • Rapid City, SD 886- 672 -1225 • College Station, A 888 -690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz GW 4/11/13 S26889 <br />Analyte Count Result Units <br />Method: E903.0 <br />Sample ID: C13040486 -001 GMS <br />Sample Matrix Spike <br />Radium 226 <br />22 pCi /L <br />Sample ID: C13040486- 001GMSD <br />Sample Matrix Spike Duplicate <br />Radium 226 <br />20 pCi /L <br />Sample ID: MB -RA226 -6600 <br />3 Method Blank <br />Radium 226 <br />-0.03 pCi /L <br />Radium 226 precision ( ±) <br />0.10 pCi /L <br />Radium 226 MDC <br />0.2 pCi /L <br />Sample ID: LCS -RA226 -6600 <br />Laboratory Control Sample <br />Radium 226 <br />11 pCi /L <br />Report Date: 05/06/13 <br />Work Order: C13040486 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA226 -6600 <br />Run. BERTHOLD 770- 2_130417A 04/24/13 11:48 <br />94 70 130 <br />Run: BERTHOLD 770- 2_130417A <br />88 70 130 6.4 <br />Run: BERTHOLD 770- 2_130417A <br />Run: BERTHOLD 770- 2_130417A <br />97 80 120 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit <br />MDC - Minimum detectable concentration U - Not detected at minimum detectable concentration <br />04/24/13 11:48 <br />22 <br />04/24/13 15:48 <br />U <br />04/24/13 15:48 <br />Page 18 of 21 <br />