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v'WW-energylab.com Helena, ldT 877-472-0711 • Billings, MT 800-735-4489 G Casper, WY 888-235-0515 <br />,.? ArurytulFxcaflanceStnce 1951- Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 Y College Station, TX 888-890-2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program - SW <br />Analyte Count Result Units <br />Method: RA-05 <br />Sample ID: LCS-228-RA226-5022 Laboratory Control Sample <br />Radium 228 6.2 pCi/L <br />Sample ID: MB-RA226-5022 3 Method Blank <br />Radium 228 -0.08 pCi/L <br />Radium 228 precision (±) 0.5 pCi/L <br />Radium 228 MDC 0.8 pCi/L <br />Sample ID: C10110487-OOlDMS Sample Matrix Spike <br />Radium 228 15 pCi/L <br />Sample ID: C10110487-001 DMSD Sample Matrix Spike Duplicate <br />Radium 228 15 pCi/L <br />Report Date: 12/23/10 <br />Work Order: C10110479 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Batch: RA228-3503 <br />Run: TENNELEC-3. 101119E 11/30/10 15:37 <br />87 70 130 <br />Run: TENNELEC-3_101119E 11/30/10 15:37 <br />U <br />Run: TENNELEC-3 101119E <br />87 70 130 <br />Run: TENNELEC-3 101119E <br />85 70 130 1.2 <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 />11/30/10 15:37 <br />11/30/10 15:37 <br />30.6 <br />Page 29 of 40