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WWAIMY ENERGYL4BORATOR/ES, INC. • 2393 Sa/t Creek Highway (82601) • P.O. Box 3258, Casper, WY82602 <br />Toll Free 888.235.0515 • 307.235.0515 • Fax 307.234.1639 • casper(Penergy/ab.com • www.energy/ab.com <br />LABORATORY ANALYTICAL REPORT <br />0lient: Denison Mines (USA) Corp Report Date: 04/02/09 <br />Project: West Sunday Mine Collection Date: 03/17/09 08:00 <br />Lab ID: C09030572-002 DateReceived: 03/18/09 <br />Client Sample ID: West Sunday #3 Matrix: Aqueous <br /> <br />Analyses <br />Result <br />Units <br />Qualifiers <br />RL MCL/ <br />QCL Method <br />Analysis Date! By <br />MAJOR IONS <br />Carbonate as C03 63 mg/L 1 A2320 B 03/30/0912:51 / Ijl <br />Bicarbonate as HC03 444 mg/L 1 A2320 B 03/30/0912:51 / Ijl <br />Calcium ND mg/L 1 E200.7 03/31/0919:00 / rdw <br />Chloride 53 mg/L 1 A4500-CI B 03/26/0912:56 / sp <br />Fluoride 4.4 mg/L 0.1 A4500-F C 03/20/0912:57/111 <br />Magnesium ND mg/L 1 E200.7 03/31/0919:00 / rdw <br />Nitrogen, Nitrate+Nitrite as N 9.3 mg/L D 0.2 E353.2 03/26/0913:30 / jai <br />Nitrogen, Nitrite as N 7.2 mg/L D 0.3 A4500-N02 B 03/19/09 07:52 / jai <br />Potassium 8 mg/L 1 E200.7 03/31/0919:00 / rdw <br />Silicon 5.9 mg/L D 0.2 E200.7 04/01/0918:21 / rdw <br />Sodium 564 mg/L 1 E200.7 03/3110919:00 / rdw <br />Sulfate 697 mg/L D 6 A4500-SO4 E 03/25/0913:47 / sp <br />PHYSICAL PROPERTIES <br />Hardness as CaC03 2 mg/L 1 A2340 B 03/31/0919:00 / kbh <br />Solids, Total Dissolved TDS @ 180 C 1710 mg/L 10 A2540 C 03/18/0915:15 / dd <br />METALS - DISSOLVED <br />7WAluminum 1410 ug/L 100 E200.8 03/20/0914:24 / is <br />Antimony ND ug/L 50 E200.8 03120/0914:24 / is <br />Arsenic 3870 ug/L 1 E200.8 03/20/0914:24 / is <br />Barium ND ug/L 100 E200.8 03/20/0914:24 / is <br />Beryllium ND ug/L 10 E200.8 03/20/0914:24 / is <br />Boron 401 ug/L 100 E200.7 03/31/0919:00 / rdw <br />Cadmium ND ug/L 10 E200.8 03/20/0914:24 / is <br />Chromium ND ug/L 50 E200.8 03120/0914:24 / is <br />Cobalt ND ug/L 10 E200.8 03/20/0914:24 / is <br />Copper ND ug/L 10 E200.8 03/20/0914:24 / is <br />Iron 563 ug/L D 70 E200.7 04/01/0918:21 / rdw <br />Lead ND ug/L 50 E200.8 03/20/0914:24 / is <br />Lithium 143 ug/L 100 E200.7 03/31/0919:00 / rdw <br />Manganese ND ug/L 10 E200.8 03/20/0914:24 / is <br />Mercury ND ug/L 1 E200.8 03/20/0914:24 / is <br />Molybdenum 4870 ug/L 100 E200.8 03/20/0914:24 / is <br />Nickel ND ug/L 50 E200.8 03/20/0914:24 / is <br />Selenium 1900 ug/L 1 E200.8 03/20/0914:24 / is <br />Silver ND ug/L 10 E200.8 03/20/0914:24 / is <br />Thallium ND ug/L 100 E200.8 03/20/0914:24 / is <br />Uranium 1650 ug/L 0.3 E200.8 03/20/0914:24 / is <br />Vanadium 468 ug/L 100 E200.8 03/20/0914:24 / is <br />Zinc ND ug/L 10 E200.8 03/20/0914:24 / is <br />sport RL - Analyte reporting limit. MCL - Maximum contaminant level. <br />flnitions: QCL - Quality control limit. ND - Not detected at the reporting limit. <br />D - RL increased due to sample matrix interference.