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ENERGYLABORATOR/ES, INC. -2393 Sa/1 Creek Highway (826011 • P.O. Box 3258- Casper, WY82802 <br />Toll Free 888 235 0515 • 307 235 0515 - Fax 307 234 1839 - csper energylab.com • www.energylab.aom <br />LABORATORY ANALYTICAL REPORT <br />0-lient: Denison Mines (USA) Corp <br />Project: West Sunday Mine <br />Lab ID: C09030572-001 <br />Client Sample ID: West Sunday #2 <br />Report Date: 04/02/09 <br />Collection Date: 03/17/09 08:00 <br />DateReceived: 03/18/09 <br />Matrix: Aqueous <br /> <br />Analyses <br />Result <br />Units <br />Qualifiers RL MCU <br />QCL Method <br />Analysis Date / By <br />MAJOR IONS <br />Carbonate as C03 39 mg/L 1 A2320 B 03/30/0912:27 / Ijl <br />Bicarbonate as HC03 630 mg/L 1 A2320 B 03/30109 12:27 / Ijl <br />Calcium 2 mg/L 1 E200.7 04/01/0918:10 / rdw <br />Chloride 42 mg/L 1 A4500-CI B 03/26/0912:54 / sp <br />Fluoride 3.5 mg/L 0.1 A4500-F C 03/20/09 12:54 / Ijl <br />Magnesium NO mg/L 1 E200.7 04/01/0918:10 / rdw <br />Nitrogen, Nitrate+Nitrite as N 0.3 mg/L 0.1 E353.2 03/26/0913:10 / jai <br />Nitrogen, Nitrite as N NO mg/L 0.1 A4500-NO2 B 03/19/09 07:49 / jal <br />Potassium 5 mg/L 1 E200.7 04/01/0918:10 / rdw <br />Silicon 5.2 mg/L D 0.2 E200.7 04/0110918:10 / rdw <br />Sodium 460 mg/L 1 E200.7 04/01/0918:10 / rdw <br />Sulfate 412 mg/L D 6 A4500-SO4 E 03/25/0913:441 sp <br />PHYSICAL PROPERTIES <br />Hardness as CaC03 5 mg/L 1 A2340 B 04/01/0918:10 / kbh <br />Solids, Total Dissolved TDS @ 180 C 1300 mg/L 10 A2540 C 03/18/0915:14 / dd <br />*ETALS - DISSOLVED <br />uminum <br />Antimony <br />Arsenic <br />Barium <br />Beryllium <br />Boron <br />Cadmium <br />Chromium <br />Cobalt <br />copper <br />Iron <br />Lead <br />Lithium <br />Manganese <br />Mercury <br />Molybdenum <br />Nickel <br />Selenium <br />Silver <br />Thallium <br />Uranium <br />Vanadium <br />Zinc <br />NO ug/L 100 E200.7 03/31/0918:55 / rdw <br />NO ug/L 50 E200.8 03/19/0914:30 / is <br />615 ug/L 1 E200.8 03/19/0914:30 / is <br />NO ug/L 100 E200.8 03/19/0914:30 / is <br />NO ug/L 10 E200.8 03/19/0914:301 is <br />445 ug/L 100 E200.7 03/31/0918:55 / rdw <br />NO ug/L 10 E200.8 03/19/0914:30 / is <br />NO ug/L 50 E200.8 03/19/0914:30 / is <br />NO ug/L 10 E200.8 03/1910914:30 / is <br />NO ug/L 10 E200.8 03/19/0914:30 / is <br />NO ug/L D 70 E200.7 04/01/0918:10 / rdw <br />NO ug/L 50 E200.8 03/19/0914:30 / is <br />127 ug/L 100 E200.7 03/31/0918:55 / rdw <br />14 ug/L 10 E200.8 03/19/09 14:30 / is <br />NO ug/L 1 E200.8 03/19/09 14:30 / is <br />627 ug/L 100 E200.8 03/19/0914:30 / is <br />NO ug/L 50 E200.7 03/31/0918:55 / rdw <br />37 ug/L 1 E200.8 03/19109 14:30 / is <br />NO ug/L 10 E200.8 03/19/09 14:30 / is <br />NO ug/L 100 E200.8 03/19/0914:30 / is <br />7070 ug/L 0.3 E200.8 03/19/0914:30 / is <br />956 ug/L 100 E200.8 03/19/0914:30 / is <br />NO ug/L 10 E200.8 03/19/0914:30 / is <br />Report RL - Analyte reporting limit. MCL - Maximum contaminant level. <br />Definitions: QCL - Quality control limit. NO - Not detected at the reporting limit. <br />D - RL increased due to sample matrix interference.