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ENERGY LABORATOA/ES,INC. •2393 Salt Creek Highway(82601)•P.D.Box 3258 • Casper, WY82602 <br /> Toil Free 888235.0515 • 307 235 0515 • Fax 307.234,1639 • casper@energylab.com•www.energylab.com <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: C09030572-001 DateReceived: 03/18/09 <br /> Client Sample ID: West Sunday#2 Matrix: Aqueous <br /> MCL/ <br /> Analyses Result Units Qualifiers RL QCL Method Analysis Date/By <br /> RADIONUCLIDES-TOTAL <br /> Gross Alpha 7140 pCi/L E900.0 03/31/09 00:50/cgr <br /> Gross Alpha precision(t) 72.0 pCi/L E900.0 03/31/09 00:50/cgr <br /> Gross Alpha MDC 6.3 pCi/L E900.0 03/31/09 00:50/cgr <br /> Gross Beta 1690 pCi/L E900.0 03/31/09 00:50/cgr <br /> Gross Beta precision(t) 16.8 pCi/L E900.0 03/31/09 00:50/cgr <br /> Gross Beta MDC 7.1 pCi/L E900.0 03/31/09 00:50/cgr <br /> DATA QUALITY <br /> A/C Balance(t 5) -3.25 % Calculation 04/02109 10:44/kbh <br /> Anions 21.6 meq/L Calculation 04/02/09 10:44/kbh <br /> Cations 20.2 meq/L Calculation 04/02/09 10:44/kbh <br /> Solids,Total Dissolved Calculated 1290 mg/L Calculation 04/02/09 10:44/kbh <br /> TDS Balance(0.80-1.20) 1.01 Calculation 04/02/09 10:44/kbh <br /> Report RL-Analyte reporting limit. MCL-Maximum contaminant level. <br /> Definitions: QCL-Quality control limit. ND-Not detected at the reporting limit. <br /> MDC-Minimum detectable concentration <br />