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ENERGYLABORATOR/EA-;!pVC.:'-2393Sa/1;CfeekHighway(82601)•P.O.Bor'3258r- Casper, WY82602 <br />Toll Free 888.235.0515,!'4307235.0515 • Fax 307.234.1639 • casoer@energy/ab.com • wwwenergylab.com <br /> LABORATORY ANALYTICAL REPORT <br /> • <br />Client: Denison Mines (USA) Corp Report Date: 01/28/09 <br />Project: Sunday Mines Attenuation Tests - 68838 Collection Date: 12/31/08 09:00 <br />Lab ID: C09010008-004 DateReceived: 01/02/09 <br />Client Sample ID: CDM-DEN-004 Matrix: Aqueous <br /> MCL1 <br />Analyses Result Units Qualifiers RL QCL Method Analysis Date / By <br />MAJORIONS <br />Calcium 63 mg/L 1 E200.7 01/13/09 17:58 / cp <br />Magnesium 25 mg/L 1 E200.7 01/13/09 17:581 cp <br />Potassium 5 mg/L 1 E200.7 01/13/09 17:58 / cp <br />Silicon 3.3 mg/L 0.1 E200.7 01/13/09 17:58 / cp <br />Sodium 23 mg/L D 8 E200.7 01/13/09 17:58 / cp <br />METALS - DISSOLVED <br />Antimony ND mg/L 0.05 E200.8 01/06/09 19:59 / is <br />Arsenic 0.069 mg/L 0.001 E200.8 01/06/09 19:59 / is <br />Molybdenum 0.4 mg/L 0.1 E200.8 01/06/09 19:59 / is <br />Selenium 0.138 mg/L 0.001 E200.8 01/06/09 19:59 / is <br />Uranium 0.0546 mg/L 0.0003 E200.8 01/06/09 19:59 / is <br />Vanadium 0.6 mg/L 0.1 E200.8 01/06/09 19:59 / is <br />RADIONUCLIDES - DISSOLVED <br />Gross Alpha 42.2 pCVL E900.0 01/19/09 22:45 / cgr <br />Gross Alpha precision (t) 3.2 pCVL E900.0 01/19/09 22:45 / cgr <br />Gross Alpha MDC 1.9 pCVL E900.0 01/19/09 22:45 / cgr • <br />Gross Beta 18.2 pCVL E900.0 01/19/09 22:45 / cgr <br />Gross Beta precision (t) 2.0 pCVL E900.0 01/19/09 22:45 / cgr <br />Gross Beta MDC 2.8 pCVL E900.0 01/19/09 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.