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www.ene 6ab.com Helena, MT 877-472-0711 • Billings, MT 600-7354489 • Casper, WY 888435-0515 <br />AW&"E,e a M 9= Ipss J Gillette, WY 866-686-7175 • Rapid City, SD 886-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 11/29/10 <br />Project: Schwartzwalder Water Monitoring Program SW Work Order: C10101013 <br /> <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E900.0 Batch: GrAB-1001 <br />Sample ID: MB-GrAB-1001 6 Method Blank Run: G5000W_101112A 11/14/10 01:14 <br />Gross Alpha -1 pCi/L U <br />Gross Alpha precision (±) 0.8 pCi/L <br />Gross Alpha MDC 0.9 pCi/L <br />Gross Beta 0.3 pCi/L U <br />Gross Beta precision (±) 2 pCi/L <br />Gross Beta MDC 2 pCi/L <br />Sample ID: Th230-GrAB-1001 Laboratory Control Sample Run: G5000W_101112A 11/14/10 01:14 <br />Gross Alpha 130 pCi/L 128 70 130 <br />Sample ID: Cs137-GrAB-1001 Laboratory Control Sample Run: G5000W_101112A 11/14/10 01:15 <br />Gross Beta 94 pCi/L 105 70 130 <br />Sample ID: 010100831-011 DMS Sample Matrix Spike Run: G5000W_101112A 11/16/10 01:41 <br />Gross Alpha 97.7 pCi/L 96 70 130 <br />Sample ID: C1 0100831 -011 DMSD Sample Matrix Spike Duplicate Run: G5000W_101112A 11/16/10 01:41 <br />Gross Alpha 81.0 pCi/L 80 70 130 19 19.3 <br />Sample ID: C10100831-011DMS Sample Matrix Spike Run: G5000W_101112A 11/16/10 01:41 <br />Gross Beta 118 pCi/L 118 70 130 <br />Sample ID: C10100831-011DMSD Sample Matrix Spike Duplicate Run: G5000W_101112A 11/16/10 01:41 <br />Gross Beta 114 pCi/L 113 70 130 3.4 15.4 <br />Sample ID: 010100945-002CDUP 6 Sample Duplicate Run: G5000W_101112A 11/16/10 01:41 <br />Gross Alpha -0.107 pCi/L 220 332.9 U <br />Gross Alpha precision (±) 3.26 pCi/L <br />Gross Alpha MDC 5.52 pCi/L <br />Gross Beta 8.68 pCi/L 26 72.6 <br />Gross Beta precision (±) 2.44 pCi/L <br />Gross Beta MDC 3.84 pCi/L <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration U - Not detected at minimum detectable concentration <br />Page 23 of 32