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www.energylab.com Helena MT 677-472-0711 Y Billings, MT 800-735-4489 • Casper, WY 888-235-0515 <br />EWTI-MI.-TTIVISIMS •` t"'??F'e°dB°t°?°Cd t Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College Station, TX 888-690-2216 <br />QA/QC Summary Report <br />Client: Cotter Corporation <br />Project: Schwartzwalder Water Monitoring Program <br />Report Date: 09/09/10 <br />Work Order: C10080639 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: RA-05 Batch: RA228-3336 <br />Sample ID: LCS-228-RA226-4743 Laboratory Control Sample Run: TENNELEC-3_100824C 09/01/10 11:45 <br />Radium 228 7.82 pCi/L 110 70 130 <br />Sample ID: MB-RA226-4743 3 Method Blank Run: TENNELEC-3_100824C 09/01/10 11:45 <br />Radium 228 -0.4 pCi/L U <br />Radium 228 precision (±) 0.7 pCi/L <br />Radium 228 MDC 1 pCi/L <br />Sample ID: C10080639-001 FMS Sample Matrix Spike Run: TENNELEC-3_100824C 09/01/10 11:45 <br />Radium 228 15.3 pCi/L 99 70 130 <br />Sample ID: C10080639-001 FMSD Sample Matrix Spike Duplicate Run: TENNELEC-3_100824C 09/01/10 11:45 <br />Radium 228 16.8 pCi/L 109 70 130 8.8 35.3 <br />Qualifiers: <br />RL - Analyte reporting limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration U - Not detected at minimum detectable concentration <br />Page 17 of 21