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\ www.ererolab.com f Helena, MT 877- 472 -0711 • Billings, W 800- 735 -4489 • Casper, WY 888 - 235 -6515 <br />AearyCks/Eu'dM°aS�ou 1lSY J Gillette, WY 866 -086 -7175 • Rapid City, s0 886- 672 -1225 • College station, TX 888 -690 -2218 <br />QA /QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Report Date: <br />05/20/13 <br />Project: Schwartz SW 05/08/13 <br />(S26871 & S26873) <br />Work Order: <br />C13050368 <br />Analyte <br />Count Result Units <br />RL %REC <br />Low Limit High Limit <br />RPD <br />RPDLimit Quall <br />Method: E903.0 <br />Batch: RA226 -6663 <br />Sample ID: C13050907- 001HMS <br />Sample Matrix Spike <br />Run: BERTHOLD 770- 1_130530B <br />06/05/13 19:22 <br />Radium 226 <br />25 pCi /L <br />111 <br />70 130 <br />Sample ID: 013050907- 001HMSD <br />Sample Matrix Spike Duplicate <br />Run: BERTHOLD 770- 1_130530B <br />06/05/13 19:22 <br />Radium 226 <br />25 pCi /L <br />109 <br />70 130 <br />0.9 <br />17.9 <br />Sample ID: MB- RA226 -6663 <br />3 Method Blank <br />Run: BERTHOLD 770- 1_130530B <br />06/05/13 23:22 <br />Radium 226 <br />0.03 pCi /L <br />U <br />Radium 226 precision ( ±) <br />0.07 pCi /L <br />Radium 226 MDC <br />0.1 pCi /L <br />Sample ID: LCS- RA226 -6663 <br />Laboratory Control Sample <br />Run- BERTHOLD 770- 1_130530B <br />06/05/13 23:22 <br />Radium 226 <br />12 pCi /L <br />109 <br />80 120 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 6 of 10 <br />