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ENEW YLABORATOR/E4 >AOC -,e= Sa/1 Creek Highway (82601) • P.O. Box 3258 - Caspw, WYB2602 <br />W Fme 80.235 0515 - 307.2350515 - Fax 307234.1639 - casper enayXab com - www.energylab com <br />AIFM <br />• LABORATORY ANALYTICAL REPORT <br />Client Denison Mines (USA) Corp Report Date: 01/28/09 <br />Project Sunday Mines Attenuation Tests - 68838 Collection Date: 12/30/08 08:00 <br />Lab ID: C08120940-004 DateRecehreck 12131/08 <br />Client Sample ID: COM-DEN-019 Matrix: Aqueous <br /> <br />Arelyses <br />Resul <br />t Units <br />Qualifiers RL MCv <br />QCL Method <br />Analysis Date / By <br />MAJOR IONS <br />Calcium 75 mg/L 1 E200.7 0111 3!09 17:211 cp <br />Magnesium 18 MOIL 1 E200.7 01/1310917:21 / cp <br />Potassium 35 mg/L 1 E200.7 01/1310917:21 / cp <br />silicon 4.4 mg/L 0.1 E200.7 01/1310917:21 / cp <br />Sodium 361 mg/L D 8 E200.7 01/1310917:21 / cp <br />METALS - DISSOLVED <br />Antimony ND mg/L 0.03 E200.8 01/02/09 01:07 / is <br />Arsenic 0.027 mg/L 0.001 E200.8 01/02!09 01:07 / is <br />Molybdenum 0.9 mg/L 0.1 E200.8 01/02/09 01:07 / is <br />Selenium 0.338 mg/L 0.001 E200.8 01102109 01:07 / is <br />Uranium 0.0249 mg/L 0.0003 E200.8 01102/09 01:07 / is <br />Vanadium 0.7 mg/L 0.1 E200.8 01102/09 01:07 / is <br />RADIONUCLIDES - DISSOLVED <br />Gross Alpha 24.7 pCUL E900.0 01/19109 22:45 / cgr <br />Gross Alpha precision (t) 8.2 pCi/L E900.0 01119109 22:45 / cgr <br />• <br />Gross Alpha MOC 7.2 pCUL E900.0 01/19/09 22:45 / cgr <br />Gross Beta 28.3 pCUL E900.0 01/19109 22:45 / cgr <br />Gross Bets precision (t) 7.2 pCUL E900.0 01/19109 22:45 / cgr <br />Gross Beta MOC 11.3 pCi/L E900.0 01/19/09 22:45 / ogr <br />Report RL - AnslyN reporting land. MCL - Maximum oonteminant Wet. <br />Definitions: QCL - Quality control Umd. ND - Not detec•;ted at the sporting M* <br />0 MOC - Minimum detectable concentration 0 - RL increased due to sample matrix interference.