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• www.erw&ab.com Helena, MT 877- 472 -0711 • Billings, W 800- 735 -4489 • Casper, WY 888 -235 -8515 <br />AuWW&c'g1=9= IW Gillette, WY 886 - 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: 08/30/13 <br />Project: Schwartz -SW 8/7/13 S27021,S27023 Work Order: C13080332 <br />Analyte Count Result Units RL ° /.REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226 -6795 <br />Sample ID: C13080332- 001CMS Sample Matrix Spike Run: BERTHOLD 770- 1_130814A 08/20/13 10:01 <br />Radium 226 25 pCdL 109 70 130 <br />Sample ID: C13080332- 001CMSD <br />Radium 226 <br />Sample ID: MB- RA226 -6795 <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />Sample ID: LCS- RA226 -6795 <br />Radium 226 <br />Sample Matrix Spike Duplicate <br />20 pCi /L <br />3 Method Blank <br />-0.1 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 />13 pCi /L <br />Run: BERTHOLD 770- 1_130814A 08/20/13 10:01 <br />88 70 130 20 23.9 <br />Run. BERTHOLD 770- 1_130814A 08/20/13 11:56 <br />U <br />Run: BERTHOLD 770- 1_130814A 08/20/13 11:56 <br />112 80 120 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 5 of 9 <br />