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www.erserdab.com Helena,lit!$77-472-0711 •Billings,MY 800-7354489•Casper,WY 888-235-0515 <br /> Lr" i Si°0CJ 11ru Gillette,WY 866-686-7175•Rapid City,SD 886-672-1225•College Station,ix 888-690-2218 <br /> QA/QC Summary Report <br /> Prepared by Casper,WY Branch <br /> Client: Cotter Corporation Report Date: 06/13/14 <br /> Project: Schwartz-GW 5/21/14 S27511 Work Order: C14050681 <br /> Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br /> Method: E903.0 Batch: RA226-7197 <br /> Lab ID: C14050577-001DMS Sample Matrix Spike Run:G5000W_140523A 06/02/14 13:32 <br /> Radium 226 57 pCi/L 80 70 130 <br /> Lab ID: C14050577-001DMSD Sample Matrix Spike Duplicate Run:G5000W_140523A 06/02/14 13:32 <br /> Radium 226 60 pCi/L 89 70 130 4.0 16.9 <br /> Lab ID: MB-RA226-7197 3 Method Blank Run:G5000W_140523A 06/02/14 15:07 <br /> Radium 226 -0.04 pCi/L U <br /> Radium 226 precision(±) 0.1 pCi/L <br /> Radium 226 MDC 0.2 pCi/L <br /> Lab ID: LCS-RA226-7197 Laboratory Control Sample Run:G5000W_140523A 06/02/14 15:07 <br /> Radium 226 9.3 pCi/L 82 80 120 <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 21 <br />