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www.emrdab.com ( Helena, MT 877 -472 -0711 • Billings, MT 800- 735 -4489 • Casper, WY 888- 235 -0515 <br />AnxWa& ftweSfACe fe31 ) Gillette, WY 866 - 686 -7175 • Rapid City, SD 886 -672 -1225 • College Station, TX 888 -690 -2216 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartz GW 1/24/13 S26788 <br />Analyte Count Result Units <br />Report Date: 02/13/13 <br />Work Order: C13010781 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 <br />Batch: RA226 -6492 <br />Sample ID: C13010781- 001FMS Sample Matrix Spike <br />Run: BERTHOLD 770- 1_130128A <br />02/04/13 22:12 <br />Radium 226 250 pCi /L <br />142 70 130 <br />S <br />- Sample activity for this radionuclide is much larger than the spike activity added. <br />Therefore the matrix spike recovery could not be calculated. The <br />LCS and the RPD of the <br />MS /MSD pair are acceptable; this batch is approved. <br />Sample ID: C13010781- 001FMSD Sample Matrix Spike Duplicate <br />Run: BERTHOLD 770- 1_130128A <br />02/04/13 22:12 <br />Radium 226 270 pCi /L <br />247 70 130 5.1 <br />13.3 S <br />- Sample activity for this radionuclide is much larger than the spike activity added. <br />Therefore the matrix spike recovery could not be calculated. The <br />LCS and the RPD of the <br />MS /MSD pair are acceptable; this batch is approved. <br />Sample ID: MB -RA226 -6492 3 Method Blank <br />Run: BERTHOLD 770- 1_130128A <br />02/04/13 22:12 <br />Radium 226 -0.09 pCi /L <br />U <br />Radium 226 precision ( ±) 0.09 pCi /L <br />Radium 226 MDC 0.2 pCi /L <br />Sample ID: LCS -RA226 -6492 Laboratory Control Sample Run: BERTHOLD 770- 1_130128A 02/04/13 22:12 <br />Radium 226 6.2 pCi /L 101 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 21 of 24 <br />