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ENEROYLABORATORIES,INC. •2393 Salt Creek Highway(82601)•P.O.Box 3258 • Casper, WY82602 <br /> Toll Free 888 235 0515 • 307 235 0515 • Fax 307.234.1639 • casper@energylab.com-www.energylab.cam <br /> LABORATORY ANALYTICAL REPORT <br /> Client: Denison Mines(USA)Corp Report Date: 04/02/09 <br /> Project: West Sunday Mine Collection Date: 03/17/09 08:00 <br /> Lab ID: C09030572-003 DateReceived: 03/18109 <br /> Client Sample ID: West Sunday#4 Matrix: Aqueous <br /> MCU <br /> Analyses Result Units Qualifiers RL QCL Method Analysis Date/By <br /> MAJOR IONS <br /> Carbonate as CO3 ND mg/L 1 A2320 B 03/30/09 12:581 Ijl <br /> Bicarbonate as HCO3 412 mg/L 1 A2320 B 03/30/09 12:581 Ijl <br /> Calcium 28 mg/L D 2 E200.7 04/01/09 18:261 rdw <br /> Chloride 491 mg/L 1 A4500-CI B 03/26/09 12:571 sp <br /> Fluoride 1.7 mg/L 0.1 A4500-F C 03/20/09 13:001 Ijl <br /> Magnesium 11 mg/L D 2 E200.7 04/01/09 18:26/rdw <br /> Nitrogen,Nitrate+Nitrite as N ND mg/L 0.1 E353.2 03/26/09 13:351jal <br /> Nitrogen,Nitrite as N ND mg/L 0.1 A4500-NO2 B 03/19/09 07:521jal <br /> Potassium 21 mg/L 1 E200.7 03/31/09 19:041 rdw <br /> Silicon 4.1 mg/L D 0.3 E200.7 04/01/09 18:261 rdw <br /> Sodium 2240 mg/L D 1 E200.7 04/01/09 18:261 rdw <br /> Sulfate 4260 mg/L D 60 A4500-SO4 E 03/25/09 13:53/sp <br /> PHYSICAL PROPERTIES <br /> Hardness as CaCO3 113 mg/L 1 A2340 B 04/01/09 18:261 kbh <br /> Solids,Total Dissolved TDS @ 180 C 6990 mg1L 10 A2540 C 03/18/09 15:151 dd <br /> METALS-DISSOLVED <br /> Aluminum ND ug/L 100 E200.7 03/31/09 19:04/rdw <br /> Antimony ND ug/L 50 E200.8 03/19/09 16:451 is <br /> Arsenic 29 ug/L 1 E200.8 03/19/09 16:451 is <br /> Barium 120 ug/L 100 E200.8 03/19109 16:45 I is <br /> Beryllium ND ug/L 10 E200.8 03/19/09 16:451 is <br /> Boron 324 ug1L D 200 E200.7 04/01/09 18:26/rdw <br /> Cadmium ND ug/L 10 E200.8 03/19/09 16:451 is <br /> Chromium ND ug/L 50 E200.8 03/19/09 16:45 1 ts <br /> Cobalt 76 ug/L 10 E200.8 03/19/09 16:451 is <br /> Copper 47 ug/L 10 E200.8 03/19/09 16:45 Its <br /> Iron 155 ug1L D 100 E200.7 03/31/09 19:041 rdw <br /> Lead ND ug/L 50 E200.8 03/19/09 16:451 is <br /> Lithium 847 ug/L 100 E200.7 03/31/09 19:041 rdw <br /> Manganese 294 ug/L 10 E200.8 03/19/09 16:451 is <br /> Mercury ND ug1L 1 E200.8 03/19/09 16:45/is <br /> Molybdenum 271 ug/L 100 E200.8 03/19/09 16:45/is <br /> Nickel ND ug1L 50 E200.8 03/19/09 16:451 is <br /> Selenium 51 ug/L D 2 E200.8 03/19/09 16:451 is <br /> Silver ND ug/L 10 E200.8 03/19/09 16:451 is <br /> Thallium ND ug/L 100 E200.8 03/19/09 16:451 is <br /> Uranium 17.9 ug/L 0.3 E200.8 03/19/09 16:451 is <br /> Vanadium ND ug/L 100 E200.8 03/19/09 16:451 is <br /> Zinc 78 ug/L 10 E200.8 03/19/09 16:451 is <br /> Report RL-Analyte reporting limit. MCL-Maximum contaminant level. <br /> Definitions: QCL-Quality control limit. ND-Not detected at the reporting limit. <br /> D-RL increased due to sample matrix interference. <br />