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www.energylabxom { Helena, MT 877-472-0711 • Billings, MT B00-735-4489 - Casper, w 888-235-0515 <br />Gillette, WY 866-686-7175 0 Rapid City, SO 888-672-1225 Y College Station, TX 888-690-2218 <br />AaalylicalErcallenceSinn 7852 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Sampling Program-Ground Water <br />Analyte <br />Count Result Units <br />Report Date: 12/09/10 <br />Work Order: C10110027 <br />RL %REC Low Limit High Limit RPD RPDLimil Qual <br />Method: E900.0 baicn:urAo- iuuw <br />Sample ID: MB-GrAB-1004 6 Method Blank Run: G542M_101117A 11/19/10 22:52 <br />Gross Alpha -0.08 pCi/L U <br />Gross Alpha precision (t) 0.8 pCi/L <br />Gross Alpha MDC 0.9 pCi/L <br />Gross Beta 0.6 pCi/L U <br />Gross Beta precision (±) 1 pCi/L <br />Gross Beta MDC 1 pCi/L <br />Sample ID: Th230-GrAB-1004 Laboratory Control Sample Run: G542M_1 0 11 17A 11/19/10 22:52 <br />Gross Alpha 85 pCi/L 83 70 130 <br />Sample ID: Cs137-GrAB-1004 Laboratory Control Sample Run: 0542M_101117A 11/19/10 22:52 <br />Gross Beta 82 pCi/L 92 70 130 <br />Sample ID: C10110027-002FMS Sample Matrix Spike Run: G542M_1 0 11 17A 11/20/10 11:00 <br />Gross Alpha 575 pCi/L 145 70 130 S <br />le response is much larger than spike amount, therefore small variances in the <br />• Sam sample adversely affected the recovery. The LCS a nd the RPD of the MS/MSD pair <br />p <br />meets acceptance criteria: this batch is approved. <br />Sample ID: C10110027-002FMSO Sample Matrix Spike Duplicate Run: G542M_101117A 11/20/10 11:00 <br />Gross Alpha 518 pCi/L 89 70 130 11 13.8 <br />Sample ID: C1 01 10027-002FMS Sample Matrix Spike Run: G542M_1 011 17A 11/20/10 11:00 <br />Gross Beta 220 pCi/L 84 70 130 <br />Sample ID: C10110027-002FMSD Sample Matrix Spike Duplicate Run: G542M_101117A 11120il0 11:00 <br />Gross Beta 237 pCi/L 102 70 130 7.3 13.3 <br />Qualifiers: <br />RL - Analyle reporting limit. <br />MDC - Minimum detectable concentration <br />U - Not detected at minimum detectable concentration <br />ND - Not detected at the reporting limit. <br />S - Spike recovery outside of advisory limits. <br />Page 19 of 26