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0 i-i ' www.energylAcom t Helena, MT 877-472-0711 • Billings, MT 800-735-4489 - Casper, WY 888-235-0515 <br />?• '. - <br />2 Arulrtinffxre/mnceSlnca 195Y ! Gillette, WY 866-686-7175 • Rapid City, SD 888-672-1225 • College station, TX 888-690-2218 <br />QA/QC Summary Report <br />Client: Cotter Corporation Report Date: 09/16/10 <br />Project: Schwartzwalder Water Monitoring Program Work Order: C10080658 <br />[Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Gtual <br />Method: RA-05 Batch: RA228-3341 <br />Sample ID: LCS-228-RA226-4749 Laboratory Control Sample Run: TENNELEC-3_100825E 09/02/10 14:13 <br />Radium 228 8.0 pCi/L 108 70 130 <br />Sample ID: MB-RA226-4749 3 Method Blank Run: TENNELEC-3_100825E 09/02/10 14:13 <br />Radium 228 -0.02 pCi/L U <br />Radium 228 precision (±) 0.8 pCi/L <br />Radium 228 MDC 1 pCi/L <br />Sample ID: C10080699-00lDMS Sample Matrix Spike Run: TENNELEC-3_100825E 09/02/10 14:13 <br />Radium 228 19 pCi/L 118 70 130 <br />Sample ID: C10080699-00lDMSD Sample Matrix Spike Duplicate Run: TENNELEC-3_100825E 09/02/10 14:13 <br />Radium 228 17 pCi/L 108 70 130 9.2 38.3 <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 21 of 25