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ENERGY <br />AHORATORIES <br />Client: Cotter Corporation <br />Project: Schwartz SW 6/1/11 S25340- S25347 <br />Analyte Count <br />Result Units <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Method: E903.0 <br />Sample ID: C11060009- 001DMS <br />Radium 226 <br />Sample ID: C11060009 001DMSD <br />Radium 226 <br />Sample ID: MB - RA226 - 5406 <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />Sample ID: LCS - RA226 - 5406 <br />Radium 226 <br />Method: E903.0 <br />Sample ID: C11060117- 004FMS <br />Radium 226 <br />Sample ID: MB - RA226 - 5419 <br />Radium 226 <br />Radium 226 precision ( ±) <br />Radium 226 MDC <br />Sample ID: LCS - RA226 - 5419 <br />Radium 226 <br />www.ener®tiab.com Helena, MT 877 - 472 -0711 • Billings, Mf 808- 735=4469 • Casper, WY 888 235 -0515 <br />Analytical WON= Sines tit Gillette, WY 866 - 666 -7175 • Rapid City, SD 888 - 672 -1225 • College Station, TX 888 -690 -2218 <br />QA/QC Summary Report <br />Sample Matrix Spike <br />10.7 pCi /L <br />Sample Matrix Spike Duplicate <br />10.5 pCi /L <br />3 Method Blank <br />-0.067 <br />0.064 <br />0.14 <br />pCi /L <br />pCi /L <br />pCi /L <br />Laboratory Control Sample <br />5.8 pCi /L <br />Sample Matrix Spike <br />11 pCi /L <br />3 Method Blank <br />-0.16 <br />0.097 <br />0.24 <br />Laboratory Control Sample <br />6.6 pCi /L <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />U - Not detected at minimum detectable concentration <br />Prepared by Casper, WY Branch <br />pCi /L <br />pCi /L <br />pCi /L <br />Run: BERTHOLD 770-2_110606A <br />87 70 130 <br />Run: BERTHOLD 770- 2_110606A 06/13/11 15:07 <br />84 70 130 2.5 26.9 <br />Run: BERTHOLD 770-2_110606A <br />Run: BERTHOLD 770-2_110606A <br />94 85 115 <br />Run: BERTHOLD 770-2_110610C <br />84 70 130 <br />Sample ID: C11060117 004FMSD Sample Matrix Spike Duplicate Run: BERTHOLD 770- 2_110610C 07/11/11 11:55 <br />Radium 226 15 pCi /L 119 70 130 33 29.3 R <br />- The RPD for the MSD is high. The individual spike recoveries are within range, the MB is acceptable, and the LCS is within range, therefore the batch is approved. <br />Run: BERTHOLD 770-2_110610C <br />Run: BERTHOLD 770-2_110610C <br />106 85 115 <br />ND - Not detected at the reporting limit. <br />R - RPD exceeds advisory limit. <br />Report Date: 07/12/11 <br />Work Order: C11060117 <br />Batch: RA226 -5406 <br />06/13/11 15:07 <br />Batch: RA226 -5419 <br />07/11/11 11:55 <br />Page 26 of 38 <br />06/13/11 16:39 <br />U <br />06/13/11 16:39 <br />07/11/11 11:55 <br />U <br />07/11/11 11:55 <br />