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ENEROYLABORATORIES,INC. •2393 Sa/t Creek Highway(8280f1•P.D.Box 3258 • Casper, WY82502 <br /> Toll Free 888.235.0515 • 307.235.0515 • Fax 307.234.1639 - Casper energylab.com•wwWenergylab.com <br /> LABORATORY ANALYTICAL REPORT <br /> Client: Denison Mines(USA)Corp Report Hate: 03/18/09 <br /> Project: West Sunday Monitoring Wells Collection Date: 02/23/0913A0 <br /> Lab ID: C09020884-002 DateReceived: 02/25/09 <br /> Client Sample ID: West Sunday#4 Matrix: Aqueous <br /> MCL/ <br /> Analyses Result Units Qualifiers RL OCL Method Analysis Date/By <br /> MAJOR IONS <br /> Calcium 27 mg1L D 10 E200.7 03106/0915:041 rdw <br /> Chloride 516 mg1L 1 A4500-Cl 8 03/05/09 10:581 sp <br /> Magnesium 11 mg/L 1 E200.7 03/06/09 15:04/rdw <br /> Nitrogen,Nitrate+Nitrite as N NO mg1L 0.1 E353.2 03/04/09 14:17/jal <br /> Nitrogen,Nitrite as N NO mg/L 0.1 A4500-NO2 B 02/25/09 12:31/sp <br /> Sulfate 4170 mg/L D 60 A4500-SO4 E 03/02/09 13:54/sp <br /> PHYSICAL PROPERTIES <br /> Hardness as CaCO3 113 mg/L 1 A2340 B. 03/11/09 12:46/Jilt <br /> Solids,Total Dissolved TDS @ 180 C 7330 mg/L 10 A2540 C 02/26/09 10:33/ab <br /> METALS-DISSOLVED <br /> Aluminum ND ug/L 100 E200.8 02/26/09 23:231 smi <br /> Antimony NO ug/L 50 E200.8 02/26/09 23:23/sml <br /> Arsenic NO ug/L 1 E200.8 02/26/09 23:231 sml <br /> Barium NO ug/L 100 E200.8 02/26/09 23:231 smi <br /> Beryllium ND ug/L 10 E200.8 02/26109 23:231 smi <br /> Boron 612 ug/L 100 E200.7 03/06/09 15:04/rdw <br /> Cadmium NO ug/L 10 E200.8 02/26/09 23:23/sml <br /> Chromium ND ug/L 50 E200.8 02126/09 23:23/smi <br /> Cobalt ND ug/L 10 E200.8 02/26/09 23:231 sml <br /> Copper NO ug/L 10 E200.8 02/26/09 23:231 sml <br /> Iron 207 ug/L 30 E200.7 03/06/09 15:041 rdw <br /> Lead NO ug/L 50 E200.8 02/26/09 23:231 sml <br /> Lithium 792 ug/L 100 E200.7 03/10/09 18:44/rdw <br /> Manganese 23 ug/L 10 E200.8 02/26/09 23:23/smi <br /> Mercury ND ug/L 1 E200.8 02/26/09 23:231 sml <br /> Molybdenum ND ug/L 100 E200.8 02/26/09 23:23/smi <br /> Nickel ND ug/L 50 E200.8 02/26/09 23:231 sml <br /> Selenium 2 ug/L 1 E200.8 02/26/09 23:23/sml <br /> Silver NO ug/L 10 E200.8 02/26/09 23:23/smf <br /> Thallium NO ug/L 100 E200.8 02/26/09 23:23/smi <br /> Uranium 1.4 ug/L 0.3 E200.8 02/26/09 23:231 sml <br /> Vanadium ND ug/L 100 E200.8 02/26/09 23:231 sml <br /> Zinc NO ug/L 10 E200.8 02/26/00 23:23/sml <br /> RADIONUCLIDES-TOTAL <br /> Gross Alpha 15.7 pCi/L U E900.0 03/08/09 00:27/cgr <br /> Gross Alpha precision(t) 21.0 pCi/L E900.0 03/08/09 00:27/cgr <br /> Gross Alpha MDC 33.1 pC11L E900.0 03/08/09 00:27/cgr <br /> Gross Beta 32.8 pCi1L E900.0 03/08/09 00:27/cgr <br /> Gross Beta precision{t} 16.8 pCi/L E900.0 03108/09 00:27/cgr <br /> Gross Beta MDC 27.2 pCUL E900.0 03/08/09 00:27/cgr <br /> Report RL-Analyte reporting limit. MCL-Maximum contaminant level. <br /> Definitions: QCL-Quallty control limit. ND-Not detected at the reporting limit. <br /> MDC-Minimum detectable concentration D-RL increased due to sample matrix interference. <br /> U-Not detected at minimum detectable concentration <br />