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ENERGY <br />LABORATORIES <br />Client: Cotter Corporation <br />Project: Schwartz SW 6/1/11 S25340- S25347 <br />Method: RA -05 <br />Sample ID: LCS- 228 -RA226 -5419 <br />Radium 228 <br />Sample ID: MB -RA226 -5419 <br />Radium 228 <br />Radium 228 precision ( ±) <br />Radium 228 MDC <br />Sample ID: C11060117- 004FMS <br />Radium 228 <br />Sample ID: C11060117- 004FMSD <br />Radium 228 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />www.energyrtab.wm Helena, MT 877- 472 -0711 • Billings, MT 800 -735 -4489 • Gasper, WY 888 - 235 -0515 <br />Ansblicti &ohm Slaw 1952 Gillette, WY 866 -686 -7175 • Rapid City, SD 888 -672 -1225 • College Station, TX 888 -680 -2218 <br />3 Method Blank <br />0.032 <br />0.64 <br />1.1 <br />Sample Matrix Spike <br />14 pCi /L <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />Analyte Count <br />Result Units <br />RL' %REC Low Limit High Limit RPD RPDLimit Qual <br />Laboratory Control Sample <br />7.3 pCi /L <br />pCi /L <br />pCi /L <br />pCi /L <br />Sample Matrix Spike Duplicate <br />15 pCi /L <br />Run: TENNELEC- 3_110610B <br />108 80 120 <br />Run: TENNELEC- 3_110610B <br />Run: TENNELEC- 3_110610B <br />92 70 130 <br />Run: TENNELEC- 3_110610B <br />97 70 130 4.5 <br />Report Date: 07/12/11 <br />Work Order: C11060117 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 27 of 38 <br />Batch: RA228 -3754 <br />07/05/11 10:02 <br />07/05/11 10:02 <br />U <br />07/05/11 10:02 <br />07/05/11 10:02 <br />35.6 <br />