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• WKWXeWeb.cam `? Helena, Nl 677-412-0711 • Billings, IKf 1100-735-4419 • Casper, WY 818-235-051.5 <br />4>yli Enadieatis a 111th ' ., sG?4# ,:Wy 866-i66 Itis • Rapid City, 5011/6-672-1225 College Station, TX 1118-6911-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 09/14/10 <br />Project: Schwartzwalder Water Monitoring Program Work Order: C10080538 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLtmtt Qual <br />Method: E900.0 Batch: GrAB-0953 <br />Sample ID: MB-GrAB-0953 6 Method Blank Run: G5000W_100827A 08/28/10 20:42 <br />Gross Alpha -0.2 pCi/L U <br />Gross Alpha precision (±) 0.6 pCi/L <br />Gross Alpha MDC 0.7 pCi/L <br />Gross Beta -2 pCi/L U <br />Gross Beta precision (±) 1 pCi/L <br />Gross Beta MDC 1 pCi/L <br />Sample ID: Th230-GrAB-0953 Laboratory Control Sample Run: G5000W_100827A 08/28/10 20:42 <br />Gross Alpha 100 pCi/L 102 70 130 <br />Sample ID: Cs137-GrAB-0953 Laboratory Control Sample Run: G5000W_100827A 08/28/10 20:42 <br />Gross Beta 70 pCi/L 81 70 130 <br />Sample ID: C10080753-007CMS Sample Matrix Spike Run: G5000W_100827A 08/30/10 01:18 <br />Gross Alpha 112 pCi/L 109 70 130 <br />Sample ID: C10080753-007CMSD Sample Matrix Spike Duplicate Run: G5000W_100827A 08/30/10 01:18 <br />Gross Alpha 113 pCi/L 110 70 130 1 16.3 <br />Sample ID: C10080753-007CMS Sample Matrix Spike Run: G5000W_100827A 08/30/10 01:18 <br />Gross Beta 91.1 pCi/L 103 70 130 <br />Sample ID: C10080753-007CMSD Sample Matrix Spike Duplicate Run: G5000W_100827A 08/30/10 01:18 <br />Gross Beta 89.7 pCi/L 102 70 130 1.6 15.8 <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 23 of 31