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?• ?"'? www.energylab.COm Helena, MT 877-472-0711 * Billings, MT 800-735.4489 • Casper, wy 888-235-0515 <br />AastyNcalfrcaUenceSince 1852 Gillette, WY 866-686-7175 - Rapid Cfty, SD 888-672-1225 - College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 09/09/10 <br />Project: Schwartzwalder Water Monitoring Program Work Order: C10080639 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226-4743 <br />Sample ID: C10080489-001DMS Sample Matrix Spike Run: BERTHOLD 770-2_100824A 09/07/10 22:56 <br />Radium 226 22 pCi/L 102 70 130 <br />Sample ID: C10080489-001DMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770-2_100824A 09/07/10 22:56 <br />Radium 226 21 pCi/L 98 70 130 3 21.7 <br />Sample ID: MB-RA226-4743 3 Method Blank Run: BERTHOLD 770-2_100824A 09/08/10 00:43 <br />Radium 226 -0.1 pCi/L U <br />Radium 226 precision (±) 0.08 pCi/L <br />Radium 226 MDC 0.2 pCi/L <br />Sample ID: LCS-RA226-4743 Laboratory Control Sample Run: BERTHOLD 770-2_100824A 09/08/10 00:43 <br />Radium 226 8.4 pCi/L 108 70 130 <br />Method: E903.0 Batch: RA226-4741 <br />Sample ID: C10080582-007CMS Sample Matrix Spike Run: TENNELEC-3_100824A 08/30/10 12:08 <br />Radium 226 17.7 pCi/L 89 70 130 <br />Sample ID: C10080582-007CMSD Sample Matrix Spike Duplicate Run: TENNELEC-3_100824A 08/30/10 12:08 <br />Radium 226 20.0 pCi/L 104 70 130 12 22.4 <br />Sample ID: MB-RA226-4741 3 Method Blank Run: TENNELEC-3_100824A 08/30/10 14:20 <br />Radium 226 0.1 pCi/L U <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 08/30/10 14:20 <br />Radium 226 4.8 pCi/L 60 70 130 S <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 />Page 15 of 21