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www.energylab.corn Helena, MT 877-472-0711 o Billings, MT 800-735-4489 a Casper, WY 888-235-8515 <br />AaatyBcslfrca!leacesinca Y85Y Gillette, WY 866-686-7175 & Rapid City, SO 888-672-1225 • college station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program-Discharge <br />Analyte Count Result Units <br />Report Date: 09/27/10 <br />Work Order: C10090073 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: RA-05 <br />Sample ID: LCS-228-RA226-4772 <br />Radium 228 <br />Sample ID: MB-RA226-4772 <br />Radium 228 <br />Radium 228 precision (±) <br />Radium 228 MDC <br />Sample ID: C10090075-001AMS <br />Radium 226 <br />Sample ID: C10090075-001AMSD <br />Radium 228 <br /> Balch: RA228-3361 <br />Laboratory Control Sample Run: TENNELEC-3-100907A 09/10/10 13:44 <br />5.3 pCi/L 75 70 130 <br />3 Method Blank Run: TENNELEC-3100907A 09110110 13:44 <br />.0.3 pCi/L U <br />1.0 pCi/L <br />2 pCVL <br />Sample Matrix Spike Run: TENNELEC-3_100907A 09/10/10 13:45 <br />12 pCi/L 79 70 130 <br />Sample Matrix Spike Duplicate Run: TENNELEC-3-100907A 09/10/1013:45 <br />12 pCi/L 76 70 130 1.2 52.7 <br />Qualifiers: <br />RL - Analyle reporting limit. <br />MDC - Minimum delectable concentration <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum delectable concentration <br />Page 18 of 22