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www.energytab.com Helena MT 877472-0711 Billings, MT 800-735-4489 . Caspar, WY 888-235-0515 <br />Anstl4irsm"Ileare $/ars 1931 j Gillette. WY 866.686-7175 4 Rapid City, SO 8BB-672-1225 a college Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program-Discharge <br />Report Date: 09/21/10 <br />Work Order: C10090075 <br />Ana lyte Result Units RL %REC Low Limit High Limit RPD RPDLimit Quai <br />Method: E903.0 <br />Sample 10: 010090073-001FMS Sample Matrix Spike <br />Radium 226 20 pCi/L <br />Sample ID: C1 0090073-001 FMSD Sample Matrix Spike Duplicate <br />Radium 226 22 pCi/L <br />Sample ID: MB-RA226-4772 Method Blank <br />Radium 226 0.14 pCi/L <br />Radium 226 precision M 0.095 pCiiL <br />Radium 226 MDC 0.12 pCi/L <br />Sample ID: LCS-RA226.4772 Laboratory Control Sample <br />Radium 226 8.1 pCi/L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Batch: RA226-4772 <br />Run: TENNELEC-3_100903C 09/15/10 08:54 <br />109 70 130 <br />Run: TENNELEC-3_100903C 09/15/1008:54 <br />121 70 130 8.3 22.1 <br />Run: TENNELEC-3_100903C 09/15/10 08:54 <br />U <br />Run: TENNELEC-3_100903C 09/15/10 08:54 <br />101 70 130 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 4 of 8