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<br />AIR POLLUTION CONTROL DIVISION <br />PRELIMINARY ANALYSIS <br />PERMIT NUMBERS: 09MOO325F DATE: April 24, 2009 <br />&,PPLICANT: Denison Mines (USA) Corp. <br />PERMIT ENGINEER: Charles N. Pray.P.E-P.L.S. CONTROL ENGINEER: R K Hancock III, PE <br />PROJECT DESCRIPTION <br />Denison Mines (USA) Corp. has applied for permits for the Sunday Mine complex located Section 29, <br />Township 46 North, Range 17 West of the New Mexico Principal Meridian, in Montrose County, <br />Colorado. The permits would allow for the construction and operation of facilities in support of a complex <br />of underground uranium/vanadium ore mines. Based on the emission estimates, it is determined that the <br />uranium/vanadium ore mining is a minor source for Operating Permit (under Title V of the Federal Clean <br />Air Act). <br />SUMMARY OF EMISSIONS <br />Point Source Emissions (Vent holes) <br />Tons per year <br />PM 4.1 <br />PM 10 (All PM is considered to be PM 10) 4.1 <br />r? <br />Fugitive Emissions <br />Particulate matter <br />2.9 <br />PM10 (Particles with a mean diameter of 10 micrometers [µm] 1.4 <br />or less) <br />SOURCE'S REGULATORY STATUS <br />Permitting of this facility represents a new minor emission source. <br />This source requires public comment as a matter of the anticipated public concern, and other relevant <br />factors. (Reference: Regulation 3, Part B.III.C.3.) <br />E