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www.mdab.com J Gillette, W Helena, MT 877- 472 -0711 • Billings, MY 808.735 -4489 a Casper, WY 888- 235 -0515 <br />A&Wkaf c as s�rca ie3t Y 866 - 666 -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 />Report Date: <br />04/29/13 <br />Project: Schwartz -SW 4/10/13 S26886 S26887 <br />Work Order: <br />C13040460 <br />Analyte Count Result Units <br />RL %REC Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: E903.0 <br />Batch: RA226 -6600 <br />Sample ID: C13040486- 001GMS <br />Sample Matrix Spike <br />Run: BERTHOLD 770- 2_130417A <br />04/24/13 11:48 <br />Radium 226 <br />22 pCi /L <br />94 70 130 <br />Sample ID: C13040486- 001GMSD <br />Sample Matrix Spike Duplicate <br />Run: BERTHOLD 770- 2_130417A <br />04/24/13 11:48 <br />Radium 226 <br />20 pCi /L <br />88 70 130 6.4 <br />22 <br />Sample ID: MB -RA226 -6600 <br />3 Method Blank <br />Run: BERTHOLD 770- 2_130417A <br />04/24/13 15:48 <br />Radium 226 <br />-0.03 pCi /L <br />U <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 />Run: BERTHOLD 770- 2_130417A <br />04/24/13 15:48 <br />Radium 226 <br />11 pCi /L <br />97 80 120 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 5 of 9 <br />