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\ www.energyia6.com Helena, MT 877472-0711 - Billings, MT 600-7354489 - Casper, WY 888-235-0515 <br />• IUY"EW&b=V=1W1 J Gillette, WY 866-686-7175 - Rapid City, SD 88B-672-1225 - College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 08/15/10 <br />Project: Schwartzwalder Water Monitoring Program Work Order: C10070865 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E900.0 Batch: GrAB-0938 <br />Sample ID: MB-GrAB-0938 6 Method Blank Run: G5000W_100730B 08/04/10 00:24 <br />Gross Alpha -1 pCi/L U <br />Gross Alpha precision (±) 0.6 pCi/L <br />Gross Alpha MDC 0.8 pCi/L <br />Gross Beta -3 pCi/L U <br />Gross Beta precision (±) 1 pCi/L <br />Gross Beta MDC 2 pCi/L <br />Sample ID: Th230-GrAB-0938 Laboratory Control Sample Run: G5000W_100730B 08/04/10 00:24 <br />Gross Alpha 100 pCi/L 103 70 130 <br />Sample ID: Cs137-GrAB-0938 Laboratory Control Sample Run: G5000W_100730B 08/04/10 00:24 <br />Gross Beta 79 pCi/L 92 70 130 <br />Sample ID: C10070580-001AMS Sample Matrix Spike Run: G5000W_100730B 08/04/10 00:24 <br />Gross Alpha 117 pCi/L 114 70 130 <br />Sample ID: C10070580.001AMSD Sample Matrix Spike Duplicate Run: G5000W_100730B 08/04/10 00:24 <br />Gross Alpha 122 pCi/L 120 70 130 4.6 17.2 <br />Sample ID: C10070580-001 AMS Sample Matrix Spike Run: G5000W_100730B 08/04/10 00:24 <br />Gross Beta 87.8 pCi/L 100 70 130 <br />Sample ID: C10070580-001AMSD Sample Matrix Spike Duplicate Run: G5000W_100730B 08/04/10 00:24 <br />Gross Beta 86.2 pCi/L 98 70 130 1.9 16.2 <br />Sample ID: C10070813-002EDUP 6 Sample Duplicate Run: G5000W_100730B 08/04/10 12:30 <br />Gross Alpha -2.62 pCi/L 140 362.4 U <br />Gross Alpha precision (±) 3.24 pCi/L <br />Gross Alpha MDC 5.82 pCi/L <br />Gross Beta -1.97 pCi/L 120 386.9 U <br />Gross Beta precision (±) 2.69 pCi/L <br />Gross Beta MDC 4.58 pCi/L <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration U - Not detected at minimum detectable concentration <br />Page 18 of 25