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www.energylab.com Helena, M1677-411-0711 • Billings, W 600-735-4489 • Casper, WY 888-235-0515 <br />e F"' ° Satix? Izz Gillette, WY 866-686-7175 • Rapid City, SO 886-672-1225 • College Station, TX 888-690-1218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 12/02/10 <br />Project: Schwartzwalder Water Monitoring Program - SW Work Order: C10101123 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E900.0 <br /> Batch: GrAB-1003 <br />Sample ID: MB-GrAB-1003 6 Method Blank Run: G5000W_101116A 11/19/10 20:15 <br />Gross Alpha -0.7 pCi/L U <br />Gross Alpha precision (±) 0.7 pCi/L <br />Gross Alpha MDC 0.8 pCi/L <br />Gross Beta -0.3 pCi/L U <br />Gross Beta precision (±) 1 pCi/L <br />Gross Beta MDC 1 pCi/L <br />Sample ID: Th230-GrAB-1003 Laboratory Control Sample Run: G5000W_101116A 11/19/10 20:15 <br />Gross Alpha 100 pCi/L 100 70 130 <br />Sample ID: C10101068-001ADUP 6 Sample Duplicate Run: G5000W_101116A 11/19/10 20:15 <br />Gross Alpha -0.487 pCi/L 18000 838.7 UR <br />Gross Alpha precision (±) 2.01 pCi/L <br />Gross Alpha MDC 3.46 pCi/L <br />Gross Beta 4.58 pCi/L 37 102 <br />4 <br />Gross Beta precision (±) 1.83 pCi/L . <br />Gross Beta MDC 2.93 pCi/L <br />- For Gross Alpha the Sample and the Duplicate are both below the MDC; the RPD is acceptable . <br />Sample ID: C1 0110088-001 AMS Sample Matrix Spike Run: G5000W_101116A 11/22/10 23:34 <br />Gross Alpha 91 pCi/L 89 70 130 <br />Sample ID: C10110088-001AMSD Sample Matrix Spike Duplicate Run: G5000W_101116A 11/22/10 23:34 <br />Gross Alpha 110 pCi/L 108 70 130 20 20 <br />Sample ID: C10110088-001AMS Sample Matrix Spike Run: G5000W_101116A 11/22/10 23:34 <br />Gross Beta 91 pCi/L 100 70 130 <br />Sample ID: C10110088-001AMSD Sample Matrix Spike Duplicate Run: G5000W_101116A 11/22/10 23:34 <br />Gross Beta 84 pCi/L 92 70 130 8.1 15.8 <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 />R - RPD exceeds advisory limit. <br />Page 25 of 37