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www.ene z ab.com Helena, MT 877 -472 -0711 • Billings, W808-735-4489 • Casper, WY 688- 235 -0515 <br />SI.. Im Gillette, WY 866 -666 -7175 • Rapid City, So 88B- 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 06/12/13 S27034 <br />Analyte <br />Count Result <br />Units <br />Method: E903.0 <br />Sample ID: C13060423- 001EDUP <br />3 Sample Duplicate <br />Radium 226 <br />0.27 <br />pCi /L <br />Radium 226 precision ( ±) <br />0.14 <br />pCi /L <br />Radium 226 MDC <br />0.18 <br />pCi /L <br />Sample ID: C13060505 -001 FMS <br />Sample Matrix Spike <br />Radium 226 <br />24 <br />pCi /L <br />Sample ID: MB- RA226 -6699 <br />3 Method Blank <br />Radium 226 <br />0.01 <br />pCi /L <br />Radium 226 precision ( ±) <br />0.10 <br />pCi /L <br />Radium 226 MDC <br />0.2 <br />pCi /L <br />Sample ID: LCS- RA226 -6699 <br />Laboratory Control Sample <br />Radium 226 <br />12 <br />pCi /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Report Date: 07/05/13 <br />Work Order: C13060505 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA226 -6699 <br />Run: BERTHOLD 770- 2_130617A 06/24/13 06:51 <br />32 103.5 <br />Run: BERTHOLD 770- 2_130617A 06/24/13 08:25 <br />105 70 130 <br />Run: BERTHOLD 770- 2_130617A 06/24/13 10:01 <br />U <br />Run: BERTHOLD 770- 2_130617A 06/24/13 10:01 <br />106 80 120 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 18 of 21 <br />