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wwwtwgoab.cn � Helena, MT 677 -472 -0711 • Billings, MT 600- 7354489 • Casper, WY 888- 235 -0515 <br />1Q'-q'" IJV 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 Report Date: 08/29/13 <br />Project: Schwartz -GW 8/2/13 S27063 Work Order: C13080122 <br />Analyte Count Result Units RL ° /oREC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226 -6787 <br />Sample ID: C13080107- 007AMS Sample Matrix Spike Run: BERTHOLD 770- 1_130812C 08/26/13 09:10 <br />Radium 226 23 pCi /L 101 70 130 <br />Sample ID: C13080107- 007AMSD Sample Matrix Spike Duplicate <br />Radium 226 23 pCi /L <br />Sample ID: MB- RA226 -6787 <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />Sample ID: LCS- RA226 -6787 <br />Radium 226 <br />3 Method Blank <br />-0.04 pCi /L <br />0.1 pCi /L <br />0.2 pCi /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Laboratory Control Sample <br />11 pCi /L <br />Run: BERTHOLD 770- 1_130812C 08/26/13 09,10 <br />99 70 130 1.9 21.8 <br />Run. BERTHOLD 770- 1_130812C 08/26/13 10:45 <br />U <br />Run: BERTHOLD 770- 1_130812C 08/26/13 10:45 <br />101 80 120 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 8 of 12 <br />