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www.energyiab.mm Helena, MY 677-472-0711 a Binings, MT 800-735-4489 a Casper, WY 888-235-0515 <br />+a+i Gillette, WY 866-686-7175 a Rapid City, SD 889-672-1225 a College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program SW <br />Report Date: 12/01/10 <br />Work Order: C10100934 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 Batch: RA226-4957 <br />Sample ID: C10100934-003EMS Sample Matrix Spike Run: BERTHOLD 770-2_101103A 11/12/10 08:22 <br />Radium 226 17 pCi/L 111 70 130 <br />Sample ID: C10100934-003EMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770-2_101103A 11/12/10 08:22 <br />Radium 226 16 pCi/L 103 70 130 6.8 24.1 <br />Sample ID: LCS-RA226-4957 Laboratory Control Sample Run: BERTHOLD 770-2_101103A 11/12/10 08:22 <br />Radium 226 8.0 pCi/L 103 70 130 <br />Sample ID: MB-RA226-4957 3 Method Blank Run: BERTHOLD 770-2_101103A 11/12/10 08:22 <br />Radium 226 -0.11 pCi/L U <br />Radium 226 precision (±) 0.070 pCi/L <br />Radium 226 MDC 0.17 pCi/L <br />Method: E903.0 <br />Sample ID: 010100831-01ODMS Sample Matrix Spike <br />Radium 226 18 pCi/L <br />Sample ID: C10100831-01ODMSD Sample Matrix Spike Duplicate <br />Radium 226 16 pCi/L <br />Sample ID: MB-RA226-4981 3 Method Blank <br />Radium 226 -0.12 pCi/L <br />Radium 226 precision (±) 0.074 pCi/L <br />Radium 226 MDC 0.18 pCi/L <br />Sample ID: LCS-RA226-4981 Laboratory Control Sample <br />Radium 226 8.9 pCi/L <br />Batch: RA226-4981 <br />Run: BERTHOLD 770-21 Oil 1 OC 11/23/10 00:44 <br />113 70 130 <br />Run: BERTHOLD 770-210111 OC 11/23/10 00:44 <br />104 70 130 8.2 24.1 <br />Run: BERTHOLD 770-210111 OC 11/23/10 02:18 <br />U <br />Run: BERTHOLD 770-21 Oil I OC 11/23/10 02:18 <br />115 70 130 <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 27 of 39