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ENERGY <br />LABORATORIES <br />Client: Cotter Corporation <br />Project: Schwartz SW 07/19/11 S25861- S25868 <br />Method: RA -05 <br />Sample ID: LCS- 228 -RA226 -5530 <br />Radium 228 <br />Sample ID: MB - RA226 - 5530 <br />Radium 228 <br />Radium 228 precision ( ±) <br />Radium 228 MDC <br />Sample ID: C11070766 002FMS <br />Radium 228 <br />Sample ID: C11070766 002FMSD <br />Radium 228 <br />www.energylab.com <br />Agalytical Eredde=ice 1952 <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />3 Method Blank <br />-0.424 <br />0.570 <br />0.998 <br />Helena, MT 871- 472 -0711 • Billings, MT 800 -735 -4489 • Casper, WY 888- 235 -0515 <br />Gillette, WY 866 - 686 - 7175 • Rapid City, SD 888 672 - 1225 • College Station, TX 888 - 690 - 2218 <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 />5.90 pCi /L <br />pCi /L <br />pCi /L <br />pCi /L <br />Sample Matrix Spike Duplicate <br />12.5 pCi /L <br />Run: TENNELEC- 3_110726A <br />95 80 120 <br />Run: TENNELEC- 3_110726A <br />Report Date: 08/21/11 <br />Work Order: C11070766 <br />Batch: RA228 -3826 <br />08/10/11 11:48 <br />08/10/11 11:48 <br />U <br />Sample Matrix Spike Run: TENNELEC- 3_110726A 08/10/11 11:48 <br />12.7 pCi /L 93 70 130 <br />Run: TENNELEC- 3_110726A 08/10/11 11:48 <br />91 70 130 1.3 34.1 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Page 27 of 38 <br />