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www.mw&ab.com I Helena, MT 877472 -0711 • Billings, MT 600- 735 -4469 • Casper, WY 888- 235 -8515 <br />Ane0y"EnallwagmIM j Gillette, wy 866 -666 -7175 • Rapid City, SO 886- 672 -1225 a College Station, TX 888 -690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 06/18/13 <br />Project: Schwartz GW 5/15/2013 S26920 & S26921 Work Order: C13050697 <br />FAnalyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226 -6649 <br />Sample ID: 013050697- 001EMS Sample Matrix Spike Run: BERTHOLD 770- 1_130522B 05/29/13 11:31 <br />Radium 226 19 pCi /L 81 70 130 <br />Sample ID: 013050697 -001 EMSD <br />Radium 226 <br />Sample ID: MB- RA226 -6649 <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />Sample ID: LCS- RA226 -6649 <br />Radium 226 <br />Sample Matrix Spike Duplicate <br />22 pCi /L <br />3 Method Blank <br />-0.05 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_130522B 05/29/13 13:10 <br />94 70 130 15 22.8 <br />Run. BERTHOLD 770- 1_130522B 05/29/13 13:10 <br />U <br />Run: BERTHOLD 770- 1_130522B 05/29/13 13:10 <br />113 80 120 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 20 of 24 <br />