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www.ener&ab.com ? Helena, i11T 877472-0711 • Billings, MF 800-7354489 • Casper, WY 888-235-6515 <br />SkW IW Gillette, WY 866-666-7175 • Rapid City, SD 866-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program SW <br />Report Date: 11 /22/10 <br />Work Order: C10100592 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226-4928 <br />Sample ID: 010100458-004EMS Sample Matrix Spike Run: BERTHOLD 770-2_101021A 10/27/10 12:22 <br />Radium 226 16.7 pCi/L 105 70 130 <br />Sample ID: 010100458-004EMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770-2_101021 A 10/27/10 12:22 <br />Radium 226 14.3 pCi/L 89 70 130 15 25.9 <br />Sample ID: MB-RA226-4928 3 Method Blank Run: BERTHOLD 770-2101021 A 10/27/10 16:33 <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-RA226-4928 Laboratory Control Sample Run: BERTHOLD 770-2_101021A 10/27/10 16:33 <br />Radium 226 9.0 pCi/L 115 70 130 <br />Method: E903.0 <br />Sample ID: C10100569-001 DMS Sample Matrix Spike <br />Radium 226 16 pCi/L <br />Sample ID: C10100569-001 DMSD Sample Matrix Spike Duplicate <br />Radium 226 16 pCi/L <br />Sample ID: MB-RA226-4934 3 Method Blank <br />Radium 226 0.1 pCi/L <br />Radium 226 precision (±) 0.08 pCi/L <br />Radium 226 MDC 0.09 pCi/L <br />Sample ID: LCS-RA226-4934 Laboratory Control Sample <br />Radium 226 8.1 pCi/L <br />Batch: RA226-4934 <br />Run: TENNELEC-3_101025D 11/09/10 00:21 <br />98 70 130 <br />Run: TENNELEC-3_101025D 11/09/10 00:21 <br />103 70 130 4.3 22.3 <br />Run: TENNELEC-3 101025D 11/09/10 16:32 <br />Run: TENNELEC-3_101025D 11/09/10 16:32 <br />101 70 130 <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 28 of 36