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www.energylab.com Helena, Wr 817-472-0711 • Billings, MY 800-735-4489 • Casper, WY 888-235-0519 <br />Aurytkd&aAYnc.Sl IZ2 Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program <br />Analyte Count Result Units <br />Method: RA-05 <br />Sample ID: LCS-228-RA226-4940 Laboratory Control Sample <br />Radium 228 6.38 pCi/L <br />Sample ID: MB-RA226-4940 3 Method Blank <br />Radium 228 0.2 pCi/L <br />Radium 228 precision (±) 0.6 pCi/L <br />Radium 228 MDC 1.0 pCi/L <br />Sample ID: C10100610-001GMS Sample Matrix Spike <br />Radium 228 13.3 pCi/L <br />Sample ID: 010100610-001GMSD Sample Matrix Spike Duplicate <br />Radium 228 13.7 pCi/L <br />Report Date: 11 /29/10 <br />Work Order: C10100734 <br />RL %REC Low Limit High Limit RPD RPDLimit Qua[ <br />Batch: RA228-3465 <br />Run: TENNELEC-3_101027B 11/03/10 12:35 <br />85 70 130 <br />Run: TENNELEC-3 101027B 11/03/10 12:35 <br />U <br />Run: TENNELEC-3_101027B 11/03/10 12:35 <br />85 70 130 <br />Run: TENNELEC-3_101027B 11/03/10 12:35 <br />88 70 130 2.9 35.6 <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 23 of 29