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` vi w.energYlab.com Helena, MT 877-472-0711 . Billings, MT 600-735-4489 • Casper, WY BBB-235-0515 <br />MI Analyt/esrFxcatlercoSfice 1951 j Gillette, WY 866-OBG-7175 . Rapid City, SO 888-672-1225 a College Station, TX 888-680-2218 <br />__.... _ <br />QA/QC Summary Report <br />• 1 to 14 n <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program-Discharge <br />Analyte Count Result Units <br />Method: RA-05 <br />Sample ID: LCS-228-RA226-4857 Laboratory Con trol Sample <br />Radium 228 7.0 pCi/L <br />Sample ID: MB-RA226-4857 3 Method Blank <br />Radium 228 0.2 pCi/L <br />Radium 228 precision (±) 0.6 pCi/L <br />Radium 228 MDC 1 pCi/L <br />Sample ID: C10090967-001AMS Sample Matrix Spike <br />Radium 228 14 pCi/L <br />Sample ID: C10090967-001AMSD Sample Matrix Spike Duplicate <br />Radium 228 14 pCi/L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Revised Date. 0 6 <br />Report Date: 10/21110 <br />Work Order: C10090967 <br />RL % REC Low Limit High Limit RPD RPDLimit Quai <br />Batch: RA228-3413 <br />Run: TENNELEC-3_101005D 1 011 2/1 0 15:43 <br />93 70 130 <br />Run: TENNELEC-3_1010050 10/12/10 15:43 <br />U <br />Run: TENNELEC-3_101005D 10/12/10 15:43 <br />91 70 130 <br />Run: TENNELEC-3_101005D 10/12/1015:43 <br />91 70 130 0.1 35.3 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 6 of 9