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wwmenergylab.com J---?- Helena, W 677-472-0711 • Billings, MT 800-735-4489 • Casper, wy 888435-8515 <br />- ,wryu?lExeaAm?astaee 1A51 Gillette, WY 866-686-7175 • Rapid City, SD 886-672-1225 • College Station, TX 888-688-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program SW <br />Report Date: 12/01/10 <br />Work Order: C10100934 <br />Analyte Count Result Units <br />Method: RA-05 <br />Sample ID: LCS-228-RA226-4981 Laboratory Control Sample <br />Radium 228 7.33 pCi/L <br />Sample ID: MB-RA226-4981 3 Method Blank <br />Radium 228 -0.250 pCi/L <br />Radium 228 precision (±) 0.606 pCi/L <br />Radium 228 MDC 1.04 pCi/L <br />Sample ID: 010100831-014DMS Sample Matrix Spike <br />Radium 228 14.1 pCi/L <br />Sample ID: C10100831-014DMSD Sample Matrix Spike Duplicate <br />Radium 228 14.1 pCi/L <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA228-3482 <br />Run: TENNELEC-3 101110B 11/16/10 17:38 <br />104 70 130 <br />Run: TENNELEC-3_101110B 11/16/10 17:38 <br />U <br />Run: TENNELEC-3 101110B 11/16/10 17:38 <br />94 70 130 <br />Run: TENNELEC-3_101110B 11/16/10 17:38 <br />94 70 130 0.1 36.8 <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 28 of 39