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.............. <br />--- ...... .... ._.. _- - <br />• ' wtiyw.energylab.com Helena mT 877-472-0111 w Billings, MT 800-735.4489 • Casper. WY 088-235-0515 <br />Amoral E=11vacir We 1952 ' Gillette, WY 866-686-7175 a Rapid City, SO 888-672.1225 • College Station TX 888-690-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation Report Date: 12/15/10 <br />Project: Schwartzwalder Water Sampling Program-Ground Water Work Order: C10110379 <br />Analyle Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Clual <br />Method: E900.0 <br />Sample ID: MB-GrAB-1007 6 Method Blank <br />Gross Alpha -3 pCi/L <br />Gross Alpha precision (t) 0.7 pCi/L <br />Gross Alpha MDC 0.9 pCi/L <br />Gross Beta -0.7 pCYL <br />Gross Beta precision (±) 1 pCi/L <br />Gross Beta MDC 1 pCi/L <br />Sample ID: Th230-GrAB-1007 Laboratory Control Sample <br />Gross Alpha 97 pCi/L <br />Sample ID: Cs137-GrAB-1007 Laboratory Control Sample <br />Gross Beta 87 pCi/L <br />Sample ID: C10110146-003DDUP 6 Sample Duplicate <br />Gross Alpha -5.60 pCi/L <br />Gross Alpha precision (±) 2.54 pCi/L <br />Gross Alpha MDC 4.88 pCi/L <br />Gross Beta 3.65 pCi/L <br />Gross Beta precision (t) 2.44 pCi/L <br />Gross Bela MDC 3.99 pCi/L <br />Sample ID: C10110551-001FMS Sample Matrix Spike <br />Gross Alpha 141 pCi/L <br />Sample ID: C10110551-001FMSD Sample Matrix Spike Duplicate <br />Gross Alpha 149 pCi/L <br />Sample ID: C10110551-001 FMS Sample Matrix Spike <br />Gross Beta 101 pCi/L <br />Qualifiers: <br />RL - Analyle reporting limit. <br />MDC - Minimum delectable concentration <br />Batch: GrAB•1007 <br />Run: G542M_1 01 122A 11/24/10 22:19 <br />U <br />U <br />Run: G542M 101122A 11/24/10 22:19 <br />97 70 _ 130 <br />Run: G542M_101122A 11/24/10 22:19 <br />98 70 130 <br />Run: G542M_101122A 11/24/10 22:19 <br />0.8 100.8 U <br />0.0 143.9 U <br />Run: G542M_101122A 11/25/10 10:27 <br />106 70 130 <br />Run: G542M_1 01 122A 11/25/10 10:27 <br />114 70 130 5.1 16.6 <br />Run: G542M_11 01122A 11/29/10 23:07 <br />97 70 130 <br />ND - Not detected al the reporting limit. <br />U - Not detected at minimum delectable concentration <br />Page 16 of 21