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• www.emgylab.com Helena, MT 877 -472 -0711 - Billings, MT 800- 735 -4489 - Casper, WY 888- 235 -0515 <br />Aaalytl40ftall —St"" 1951 J 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 <br />Report Date: <br />08/08/13 <br />Project: Schwartz -GW 7/10/13 <br />S27017 <br />Work Order: <br />013070431 <br />Analyte <br />Count Result Units <br />RL ° /oREC <br />Low Limit High Limit RPD <br />RPDLimit Qual <br />Method: E903.0 <br />Batch: RA226 -6752 <br />Sample ID: C13070575- 001IMS <br />Sample Matrix Spike <br />Run: BERTHOLD 770- 2_130718A <br />07/24/13 09:46 <br />Radium 226 <br />17 pCi /L <br />75 <br />70 130 <br />Sample ID: C13070575- 001IMSD <br />Sample Matrix Spike Duplicate <br />Run: BERTHOLD 770- 2_130718A <br />07/24/13 09:46 <br />Radium 226 <br />20 pCi /L <br />88 <br />70 130 15 <br />22.9 <br />Sample ID: MB- RA226 -6752 <br />3 Method Blank <br />Run: BERTHOLD 770-2130718A <br />07/24/13 11:31 <br />Radium 226 <br />-0.1 pCi /L <br />U <br />Radium 226 precision ( ±) <br />0.09 pCi /L <br />Radium 226 MDC <br />0.2 pCi /L <br />Sample ID: LCS -RA226 -6752 <br />Laboratory Control Sample <br />Run: BERTHOLD 770- 2_130718A <br />07/24/13 11:31 <br />Radium 226 <br />10 pCi /L <br />89 <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 17 of 20 <br />