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ENERGY <br />I�.ABORATORIES <br />Radium 228 <br />Radium 228 <br />Method: RA -05 <br />Sample ID: LCS- 228 -RA226 -5515 <br />Radium 228 <br />Sample ID: MB - RA226 - 5515 <br />Radium 228 <br />Radium 228 precision ( ±) <br />Radium 228 MDC <br />Qualifiers: <br />RL - Analyte reporting limit. <br />MDC - Minimum detectable concentration <br />www.energylab.com <br />Awryakal Excellence Shwa 1952 <br />Client: Cotter Corporation <br />Project: Schwartz SW 7/13/11 S25884- S25886 <br />Analyte Count Result Units <br />Laboratory Control Sample <br />7.10 pCi /L <br />3 Method Blank <br />0.06 <br />0.8 <br />1 <br />Sample ID: C11070456- 007CMS Sample Matrix Spike <br />QA/QC Summary Report <br />Prepared by Casper, WY Branch <br />pCi /L <br />pCi /L <br />pCi /L <br />15.3 pCi /L <br />Sample ID: C11070456 007CMSD Sample Matrix Spike Duplicate <br />16.2 pCi /L <br />Helena, MT 877- 472 -0711 e Billings, MT 800 -135 -4489 ® Casper, WY 888 - 235 -0515 <br />Gillette, WY 866 -686 -7175 • Rapid City, SD 888 -612 -1225 • College Station, T% 888- 690 -2218 <br />RL %REC Low Limit High Limit RPD RPDLimit Qual <br />Run: TENNELEC -3 110719A <br />105 80 . 120 <br />Run: TENNELEC -3 110719A <br />Run: TENNELEC -3 110719A <br />113 70 130 <br />Report Date: 08/10/11 <br />Work Order: C11070522 <br />Run: TENNELEC- 3_110719A 07/26/11 13:30 <br />121 70 130 5.8 35.7 <br />ND - Not detected at the reporting limit. <br />U - Not detected at minimum detectable concentration <br />Batch: RA228 -3816 <br />07/26/11 13:30 <br />Page 22 of 28 <br />07/26/11 13:30 <br />U <br />07/26/11 13:30 <br />