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ENEROYLABORATOR/ES, INC. • 2393 Salt Creek Highway(82601)• P.O. Box 3258 • Casper, WY82602 <br />Toll Free 888.2350515 • 3072350515 • Fax 307.234.1639 • casper@energy/ab. com • www.energy/ab. com <br />LABORATORY ANALYTICAL REPORT <br />Client: Denison Mines (USA) Corp <br />Project: Sunday Mines Attenuation Tests - 68838 <br />Lab ID: C08120940-002 <br />Client Sample ID: CDM-DEN-017 <br />Report Date: 01/28/09 <br />Collection Date: 12/30/08 08:00 <br />DateReceived: 12/31/08 <br />Matrix: Aqueous <br />• <br /> MCU <br />Analyses Result Units Qualifiers RL QCL Method Analysis Date / By <br />MAJOR IONS <br />Calcium 106 mg/L 1 E200.7 01/13/09 17:09 / cp <br />Magnesium 20 mg/L 1 E200.7 01/13/09 17:09 / cp <br />Potassium 41 mg/L 1 E200.7 01/13/09 17:09 / cp <br />Silicon 8.4 mg/L 0.1 E200.7 01/13/09 17:09 / cp <br />Sodium 273 mg/L D 8 E200.7 01/13/09 17:09 / cp <br />METALS - DISSOLVED <br />Antimony ND mg/L 0.05 E200.8 01/02/09 00:53 I is <br />Arsenic 0.006 mg/L 0.001 E200.8 01/02/09 00:53 / is <br />Molybdenum 0.6 mg/L 0.1 E200.8 01/02/09 00:53 / is <br />Selenium 0.263 mg/L 0.001 E200.8 01!02/09 00:53 / is <br />Uranium 0.0068 mg/L 0.0003 E200.8 01/02/09 00:53 / is <br />Vanadium ND mg/L 0.1 E200.8 01/02/09 00:53 / is <br />RADIONUCLIDES - DISSOLVED <br />Gross Alpha 25.8 pCi/L E900.0 01119/09 22:45 / cgr <br />Gross Alpha precision (t) 6.3 pCi/L E900.0 01/19/09 22:45 ! cgr <br />Gross Alpha MDC 7.3 pCi/L E900.0 01/19/09 22:45 / cgr <br /> <br />Gross Beta <br />44.7 <br />pCi/L <br />E900.0 <br />01/19/09 22:45 / cgr • <br />Gross Beta precision (t) 6.5 pCi/L E900.0 01/19/09 22:45 / cgr <br />Gross Beta MDC 9.6 pCi/L E900.0 01/19109 22:45 / cgr <br />Report RL - Analyte reporting limit. MCL - Maximum contaminant level. <br />Definitions: QCL - Quality control limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration D - RL increased due to sample matrix interference. .