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ENERGYLABORATOR/ES, INC. -2393 Salt Creek Highway (8260.1) PC Box 3258 -Casper, WY82602 <br />Toll Free 8882350515 • 3072350515 -Fax 3072341639 :, casper&energy/a& com - www. energWab. com <br />• <br />LABORATORY ANALYTICAL REPORT <br />• Client: Denison Mines (USA) Corp Report Date: 01/28109 <br />Project: Sunday Mines Attenuation Tests - 68838 Collection Date: 12/31/08 09:00 <br />Lab ID: C09010008-003 DateReceived: 01/02/09 <br />Client Sample ID: CDM-DEN-003 Matrix: Aqueous <br />MCL/ <br />Analyses Result Units Qualifiers RL QCL Method Analysis Date / By <br />MAJOR IONS <br />Calcium <br />Magnesium <br />Potassium <br />Silicon <br />Sodium <br />METALS - DISSOLVED <br />Antimony <br />Arsenic <br />Molybdenum <br />Selenium <br />Uranium <br />Vanadium <br />RADIONUCLIDES - DISSOLVED <br />Gross Alpha <br />Gross Alpha precision (t) <br />• Gross Alpha MDC <br />Gross Beta <br />Gross Beta precision (t) <br />Gross Beta MDC <br />63 mg/L 1 E200.7 01/13/09 17:54 / cp <br />30 mg/L 1 E200.7 01/13/09 17:54 / cp <br />4 mg/L 1 E200.7 01 /13109 17:54 / cp <br />3.6 mg/L 0.1 E200.7 01/13/09 17:54 / cp <br />29 mg/L D 8 E200.7 01/13/09 17:54 / cp <br />ND mg/L 0.05 E200.8 01106/09 19:53 / is <br />0.053 mg/L 0.001 E200.8 01 /06/09 19:53 / is <br />0.4 mg/L 0.1 E200.8 01/0610919:53 / is <br />0.136 mg/L 0.001 E200.8 01/06/09 19:53 / is <br />0.0453 mg/L 0.0003 E200.8 01/06/09 19:53 / is <br />0.4 mg/L 0.1 E200.8 01 /06/09 19:53 / is <br />34.7 pCVL E900.0 01/19/09 22:45 / cgr <br />3.0 pCi/L E900.0 01/19/09 22:45 / cgr <br />2.0 pCi/L E900.0 01/19/09 22:45 / cgr <br />11.0 pCi/L E900.0 01/19/09 22:45 / cgr <br />1.9 pCi/L E900.0 01/19109 22:45 / cgr <br />2.9 pCi/L E900.0 01/19/09 22:45 / cgr <br />Report RL - Analyte reporting limit. <br />Definitions: QCL - Quality control limit. <br />MDC - Minimum detectable concentration <br />MCL - Maximum contaminant level. <br />ND - Not detected at the reporting limit. <br />D - RL increased due to sample matrix interference.