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• www.enudeb.com Helena, W 877472-0711 • Billings, W 800-7354488 • Casper, WY 888-235-1316 <br />A a."e. &cA w.ZW= nsr Gillette, WY 866-686-7175 • Rapid City, SO 888-672-1225 • College Station, TX 888-680-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 11/05/10 <br />Project: Schwartzwalder Water Monitoring Program Discharge Work Order: C10100100 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: RA-05 Batch: RA228-3437 <br />Sample ID: LCS-228-RA226-4894 Laboratory Control Sample Run: TENNELEC-3-101013E 10/21/10 10:05 <br />Radium 228 6.81 pCi/L 80 70 130 <br />Sample ID: MB-RA226-4894 3 Method Blank Run: TENNELEC-3 101013E 10/21/10 10:05 <br />Radium 228 0.9 pCi/L U <br />Radium 228 precision (±) 0.9 pCi/L <br />Radium 228 MDC 1 pCi/L <br />Sample ID: C10100071-015CMS Sample Matrix Spike Run: TENNELEC-3-101013E 10/21/10 10:05 <br />Radium 228 20.0 pCi/L 101 70 130 <br />Sample ID: C10100071-015CMSD Sample Matrix Spike Duplicate Run: TENNELEC-3-101013E 10/21/10 10:05 <br />Radium 228 19.8 pCi/L 100 70 130 0.9 33.8 <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 18 of 22