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www.enerdab.com Helena, MY 877472-0711 • Billings, MY 800-7354489 • Casper, WY 888-235-0515 <br />• Aar slat WaaStoe.liffr Gillette, WY 866-686-7175 • Rapid City, SD 886-672-1225 • college Station, TX 888-690-2216 <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: E900.0 Batch: GrAB-0993 <br />Sample ID: MB-GrAB-0993 6 Method Blank Run: G542M_101105A 11/07/10 02:37 <br />Gross Alpha .2 pCi/L U <br />Gross Alpha precision (±) 0.9 pCi/L <br />Gross Alpha MDC 1 pCi/L <br />Gross Beta 1 pCi/L U <br />Gross Beta precision (±) 1 pCi/L <br />Gross Beta MDC 1 pCi/L <br />Sample ID: Th230-GrAB-0993 Laboratory Control Sample Run: G542M_101105A 11/07/10 02:37 <br />Gross Alpha 100 pCi/L 102 70 130 <br />Sample ID: Cs137-GrAB-0993 Laboratory Control Sample Run: G542M_101105A 11/07/10 02:37 <br />Gross Beta 89 pCi/L 98 70 130 <br />Sample ID: C10100685-002AMS Sample Matrix Spike Run: G542M_101105A 11/09/10 20:42 <br />Gross Alpha 117 pCi/L 116 70 130 <br />Sample ID: C10100685-002AMSD Sample Matrix Spike Duplicate Run: G542M_101105A 11/09/10 20:42 <br />Gross Alpha 128 pCi/L 126 70 130 8.3 16.8 <br />Sample ID: C10100685-002AMS Sample Matrix Spike Run: G542M_101105A 11/09/10 20:42 <br />Gross Beta 91.3 pCi/L 100 70 130 <br />Sample ID: C10100685-002AMSD Sample Matrix Spike Duplicate Run: G542M_101105A 11/09/10 20:42 <br />Gross Beta 92.5 pCi/L 101 70 130 1.3 15.7 <br />Sample ID: C10100685-007ADUP 6 Sample Duplicate Run: G542M_101105A 11/11/10 02:40 <br />Gross Alpha 40.7 pCi/L 5.3 31.5 <br />Gross Alpha precision (±) 4.30 pCi/L <br />Gross Alpha MDC 4.36 pCi/L <br />Gross Beta 19.1 pCi/L 9.1 32.5 <br />Gross Beta precision (±) 2.07 pCi/L <br />Gross Beta MDC 2.93 pCi/L <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 27 of 36