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wwwzner6ab.com Helena, Mt 877472-0711 - Billings, MT 800-7354488 - Casper, WY 888-235-0515 <br />AW/Na/FraAbAraSlaw rRit Gillette, WY 866466-7175 - Rapid City, SO 888-672-1225 - College Station, YX 888-680-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br /> Report Date: 12/02/10 <br />Project: Schwartzwalder Water Monitoring Program - SW Work Order: C10101123 <br /> <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: RA-05 <br /> Batch: RA228-3488 <br />Sample ID: LCS-228-RA226-4995 Laboratory Control Sample Run: TENNELEC-3_101112B 11/18/10 13:48 <br />Radium 228 7.15 pCi/L 97 70 130 <br />Sample ID: MB-RA226-4995 3 Method Blank Run: TENNELEC-3_101112B 11/18/10 13:48 <br />Radium 228 0.1 pCi/L U <br />Radium 228 precision (±) 0.8 pCi/L <br />Radium 228 MDC 1 pCi/L <br />Sample ID: C10110055-OOlDMS Sample Matrix Spike Run: TENNELEC-3_101112B 11/18/10 13:48 <br />Radium 228 16.1 pCi/L 109 70 130 <br />Sample ID: C10110055-001DMSD Sample Matrix Spike Duplicate Run: TENNELEC-3_101112B 11/18/10 13:48 <br />Radium 228 14.4 pCi/L 97 70 130 11 32.6 <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 27 of 37