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www.enerdab.com Helena, MT 877472 -0711 - Billings, W 800 - 7354489 - Casper, WY 688- 235 -0515 <br />S�4" 7852 Gillette, WY 866 -686 -7175 - Rapid City, SD 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 9/10/14 S27680,S27681 <br />Analyte Count Result Units <br />Method: E903.0 <br />Lab ID: C14090400- 001EMS <br />Sample Matrix Spike <br />Radium 226 <br />25 pCi /L <br />Lab ID: 014090400- 001EMSD <br />Sample Matrix Spike Duplicate <br />Radium 226 <br />25 pCi /L <br />Lab ID: MB -RA226 -7370 <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 />Lab ID: LCS -RA226 -7370 <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: 09/30/14 <br />Work Order: C14090456 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA226 -7370 <br />Run: G5000W_140915A 09/22/14 09:58 <br />110 70 130 <br />Run: G5000W_140915A <br />107 70 130 2.5 <br />Run: G5000W 140915A <br />Run: G5000W_140915A <br />107 80 120 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />09/22/14 09:58 <br />20.2 <br />09/22/14 09:59 <br />U <br />09/22/14 09:59 <br />Page 20 of 25 <br />