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ENERGYLABORATOR/ES, 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 • casperowenergylab.com • www.energylab.com <br />LABORATORY ANALYTICAL REPORT <br />Ollent: Denison Mines (USA) Corp Report Date: 04/02109 <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 /> <br />Analyses <br />Result <br />Units MCLI <br />Qualifiers RL QCL Method <br />Analysis Date I By <br />RADIONUCLIDES - TOTAL <br />Gross Alpha 7140 pCUL E900.0 03/31/09 00:501 cgr <br />Gross Alpha precision (t) 72.0 pCi/L E900.0 03/31/09 00:50 / cgr <br />Gross Alpha MDC 6.3 pCUL E900.0 03/31/09 00:50 / cgr <br />Gross Beta 1690 pCUL E900.0 03/31/09 00:50 ! cgr <br />Gross Beta precision (t) 16.8 pCi/L E900.0 03/31109 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 (15) -3.25 % Calculation 04/02/0910:44 / kbh <br />Anions 21.6 meq/L Calculation 04/02/0910:44 / kbh <br />Cations 20.2 meq/L Calculation 04/02/0910:44 / kbh <br />Solids, Total Dissolved Calculated 1290 mg/L Calculation 04/02/0910:44 / kbh <br />TDS Balance (0.80 -1.20) 1.01 Calculation 04/02/0910:44 / kbh <br />• <br />port RL - Analyte reporting limit. MCL - Mabmum contaminant level. <br />1w finitions: QCL - Quality control limit. ND - Not detected at the reporting limit. <br />MDC - Minimum detectable concentration