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www.energylab.com j Helena, MT 877-472-0711 , Billings, MT 800-735-4489 * Casper, WY 888-235-0515 <br />MarytiwrfxcdkaceSlnrs 1851 j Gillette, WY 866-686-7175 • Rapid City, SO 888-672-1225 • College Station, T% 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program <br />Report Date: 09/16/10 <br />Work Order: C10080658 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226-4749 <br />Sample ID: C10080699-001 DMS Sample Matrix Spike Run: G542M_100825A 09/08/10 12:11 <br />Radium 226 15.8 pCi/L 99 70 130 <br />Sample ID: C10080699-OOlDMSD Sample Matrix Spike Duplicate Run: G542M_100825A 09/08/10 12:11 <br />Radium 226 15.1 pCi/L 95 70 130 4.6 25.7 <br />Sample ID: MB-RA226-4749 3 Method Blank Run: G542M_100825A 09/08/10 12:11 <br />Radium 226 -0.06 pCi/L U <br />Radium 226 precision (±) 0.1 pCi/L <br />Radium 226 MDC 0.2 pCi/L <br />Sample ID: LCS-RA226-4749 Laboratory Control Sample Run: G542M_100825A 09/08/10 12:11 <br />Radium 226 8.8 pCi/L 112 70 130 <br />Method: E903.0 <br />Sample ID: C10080582-007CMS Sample Matrix Spike Run: TENNELEC-3_100824A <br />Radium 226 17.7 pCi/L 89 70 130 <br />Sample ID: C10080582-007CMSD Sample Matrix Spike Duplicate Run: TENNELEC-3_100824A <br />Radium 226 20.0 pCi/L 104 70 130 12 <br />Sample ID: MB-RA226-4741 3 Method Blank Run: TENNELEC-3_100824A <br />Radium 226 0.1 pCi/L <br />Radium 226 precision (±) 0.10 pCi/L <br />Radium 226 MDC 0.1 pCi/L <br />Sample ID: LCS-RA226-4741 Laboratory Control Sample Run: TENNELEC-3_100824A <br />Radium 226 4.8 pCi/L 60 70 130 <br />- LCS response is outside of the acceptance range for this analysis. Since the MB, MS, and MSD are acceptable the batch is approved. <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 />Batch: RA226-4741 <br />08/30/10 12:08 <br />08/30/10 12:08 <br />22.4 <br />08/30/10 14:20 <br />U <br />08/30/10 14:20 <br />S <br />Page 20 of 25