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ENERGY <br />LABORATORIES <br />Client: Cotter Corporation <br />Project: Schwartz SW 6/15/11 S25772- S25774 <br />www.elati.com Helena, MT 877-472-0711 • Billings MT 800-735-4489 • Casper, WY 888 -235 -0515 <br />Mgt? ul mSlrea 1952 Gillette, WY 866 -888 -7175 • Rapid City, SD 888-472-1 225 • College Station, 1X 888- 690 -2218 <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Report Date: 08/03/11 <br />Work Order: C11060712 <br />Analyte Count Result Units RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: RA -05 <br />Sample ID: LCS- 228 -RA226 -5479 <br />Radium 228 <br />Sample ID: MB -RA226 -5479 <br />Radium 228 <br />Radium 228 precision ( ±) <br />Radium 228 MDC <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />Laboratory Control Sample <br />5.5 pCi /L <br />3 Method Blank <br />-0.10 pCi /L <br />0.48 pCi /L <br />0.82 pCi /L <br />Sample ID: C11060727- 002DMS Sample Matrix Spike <br />Run: TENNELEC- 3_110705D <br />83 80 120 <br />Run: TENNELEC- 3_110705D <br />Radium 228 11 pCi /L 83 70 130 <br />Run: TENNELEC- 3_110705D 07/14/11 12:40 <br />Sample ID: C11060727- 002DMSD Sample Matrix Spike Duplicate Run: TENNELEC- 3_110705D 07/14/11 12:40 <br />Radium 228 13 pCi /L 93 70 130 11 34.9 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 23 of 29 <br />Batch: RA228 -3793 <br />07/14/11 12:40 <br />07/14/11 12:40 <br />U <br />