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ENER0YLA00RA7Vft1E$ 1W -2M7 &# CreekH1g1?avay(8280V) - R0 Sox &M • Casper, WY8M2 <br />To#Flw 86191235.0515 • 307.235.0515 Aw 307.234.1839 • casp w&ena1yXab.com - www..energylab.cam <br />LABORATORY ANALYTICAL REPORT <br />Client: Denison Mines (USA) Corp Report Date: 03/18/09 <br />Project: West Sunday Monitoring Wells Collection Date: 02/2310913:10 <br />Lab 10: C09020884-002 DateReceived: 02125/09 <br />Client Sample ID: West Sunday #4 Matrix: Aqueous <br />MCL/ <br />Analyses Resuft Units Qualifiers RL QCL Method Analysis Data / By <br />MAJORIONS <br />Calcium 27 mg/L D 10 E200.7 03/08/0915:04/rdw <br />Chloride 516 mg/L 1 A4500-Cl 8 03/05!0910:58 / sp <br />Magneslum 11 mg/L 1 E200.7 03106/0915:04 I rdw <br />Nitrogen, NltMe+Nitrite as N NO mg/L 0.1 E353.2 03/04/0914:17 /Jai <br />Nitrogen, Nitrite as N NO mg1L 0.1 A45W-N02 8 0212510912:31 / sp <br />Sulfate 4170 mg1L D 60 A4500-SO4 E 03/02/0913:541 sp <br />PHYSICAL PROPERTIES <br />Hardness as CaC03 113 mg/L 1 A2340 B 03/1110912:46 ! Jlc <br />Solids, Total Dissolved TDS Q 180 C 7330 mg/L 10 A2540 C 02/26/0910:331 ab <br />METALS - DISSOLVED <br />Aluminum NO ug/L 100 E200.8 02126109 23:23 / smi <br />Antimony NO ug/l. 50 E200.8 02126109 23.231 eml <br />Arsenic NO ug1L 1 E200.8 0226/09 23:23 / sml <br />Barkint ND ug/L 100 E200.8 02126/09 23:231 smi <br />Beryllium NO ug/L 10 E200.8 02126!09 23:231 sml <br />Boron 612 ug/L 100 E200.7 0310610915:04 / rdw <br />dmlum NO ug/L 10 E200.8 02/26/09 23:231 smi <br />. <br />Chromium NO ug/L 50 E200.8 02/20923:231sml <br />Cobalt NO ug/L 10 E200.8 02126109 23:231 sml <br />Copper NO ug/L 10 E200.8 0226109 23:23 / smi <br />Iron 207 ug/L 30 E200.7 0310610915:04 / rdw <br />Lead NO ug1L 50 E200.8 02126109 23:23 / sml <br />Lithium 792 ug/L 100 E200.7 03/1010918:441 rdw <br />Manganese 23 ug/L 10 E200.8 0228109 23:231 smi <br />Mercury NO ug1L 1 E200.8 0226109.23:231 smi <br />Molybdenum ND ug/L 100 E200.8 0226109 23:23 / smi <br />Nickel NO ug/L 50 E200.8 0228/09 23:23 / sml <br />Selenium 2 ug/L 1 E200.8 0228/09 23:23 / am[ <br />Silver NO ug/L 10 E200.8 02/26/09 23:23 / smi <br />Thallum NO ug/L 100 E200.8 0226109 23:231 sml <br />Uranium 1.4 ug/L 0.3 E200.8 0226109 23231 sml <br />Vanadium . NO ug/L 100 E200.8 02@09 23:231 sml <br />Zinc NO U01L 10 E200.8 02/26109 23:23 / sml <br />RADIONUCLIDES • TOTAL <br />Gross Alpha 15.7 pCilL U 12900.0 03108/09 00:27 / cgr <br />Gross Alpha precision (t) 21.0 pC111. E900.0 03106109 00:27 / cgr <br />Gross Alpha MDC 33.1 pCUL E900.0 03/08109 00:27 / cgr <br />Gross Beta 32.8 pCUL E900.0 03/08/09 00:271 cg( <br />Gross Beta precision (t) 16.8 pCUL E900.0 03/08/09 00:271 cgr <br />Gross Beta MDC 27.2 pGUL E900.0 03/08/09 00:27 / cgr <br /> <br />Report RL - Anaiyte reporting llmlL MCL - Maximum contaminant level. <br />Watinitions: QCL - Quality control limit. NO - Not detected at the reporting limit. <br />MOO - Minimum detectable concentration D - RL increased due to sample matrix interference. <br />U - Not detected at minimum detectable concentration