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www.e welob.com Helena, MT 877 -472 -0711 • Billings, MT 680- 735 -4489 • Casper, WY 886 - 235 -8515 <br />Au#&W Exc'lliN1Qesince ID2 1 Gillette, WY 866 -606 -7175 • Rapid City, SD 886- 672 -1225 • College Station, TX 888 - 600 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 06/06/13 <br />Project: Schwartz SW 05/08/13 S26872 Work Order: 013050363 <br />F alyte Count Result Units RL ° /.REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch. RA226 -6639 <br />Sample ID: C13050387- 002AMS Sample Matrix Spike Run: BERTHOLD 770- 2_130515A 05/22/13 13:26 <br />Radium 226 19 pCi /L 81 70 130 <br />Sample ID: C13050387- 002AMSD <br />Radium 226 <br />Sample ID: MB- RA226 -6639 <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />Sample ID: LCS- RA226 -6639 <br />Radium 226 <br />Method: E903.0 <br />Sample ID: C13050363- 001FDUP <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />Sample Matrix Spike Duplicate <br />21 pCi /L <br />3 Method Blank <br />-0.06 pCi /L <br />0.1 pCi /L <br />0.2 pCi /L <br />Laboratory Control Sample <br />13 pCi /L <br />3 Sample Duplicate <br />0.26 pCi /L <br />0.13 pCi /L <br />0.16 pCi /L <br />Run: BERTHOLD 770- 2_130515A 05/22/13 13:26 <br />92 70 130 12 22.9 <br />Run: BERTHOLD 770- 2_130515A 05/22/13 13:26 <br />U <br />Run: BERTHOLD 770- 2_130515A 05/22/13 13:26 <br />112 80 120 <br />Batch: RA226 -6637 <br />Run: G5000W_130513B 05/20/13 23:25 <br />19 104 <br />Sample ID: C13050387- 001DMS <br />Sample Matrix Spike <br />Run: G5000W_130513B <br />05/20/13 23:25 <br />Radium 226 <br />270 pCi /L <br />31 70 130 <br />S <br />- Sample activity for this radionuclide is <br />much larger than the spike activity added. Therefore the matrix spike recovery could not be calculated <br />The LCS and the RPD of th <br />Duplicate are acceptable; this batch is approved <br />Sample ID: MB- RA226 -6637 <br />3 Method Blank <br />Run: G5000W_130513B <br />05/21/13 01:02 <br />Radium 226 <br />0.001 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 -6637 <br />Laboratory Control Sample <br />Run: G5000W_130513B <br />05/21/13 01:02 <br />Radium 226 <br />12 pCi /L <br />103 80 120 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />U - Not detected at minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />S - Spike recovery outside of advisory limits. <br />Page 22 of 26 <br />