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• Air Permit AmGa~an rot lonncvo Caa( Garnpmn <br />(APCD Fugitive Particulate Emissions, Section VIII, Equation (1)) <br />where: <br />s=silt content (~) = 6.2% (mean value from APCD Fugitive Particulate Emissions, Section VIII, <br />Table 11.2.2-1) <br />U=mean wind speed (mph) = 8.7 mph (APCD Fugitive Particulate Emissions, Appendix D, <br />Table D.3 for Pueblo) <br />H=drop height (ft) = 4 ft (Caterpillar Performance Handbook, Edition 26) <br />M=moisture content (%) = 2.7% from surface mining; 4.3 °k from underground mining <br />(Lorencito Canyon Mine Permit Application submitted to Division of Minerals and Geology, <br />Colorado Department of Natural Resources, Denver, Colorado, December, 1996) <br />Y=dumping devise capacity yds' = 47.6 yd' (Caterpillar Perfortitance Handbook, Edition 26) <br />No controls are practicable. <br />• Annual Emissions <br />Unloading Surface Mine Coal <br />0.00077 lb/ton * 780,000 tons = 600.6 lb/yeaz = 0.30 tons/year <br />Unloading Coal From Underground Mines <br />0.000277 * ]b/ton * 1,638,000 tons = 453.7 lb/year = 0.23 tons/year <br />Loadout Facility Coal Stockpile Wind Erosion <br />Process Description <br />Coal will be nearly continuously dumped at the Loadout facility from haul trucks, and then loaded <br />to rail cars with a front end loader. The maximum area that could be exposed to wind-blown <br />erosion would be the size of the loading pad, 250 ft X 100 ft, or 0.57 acres. Continuous <br />sprinkling will occur as the coal is moved to the most expedient of the three bays for loading to <br />rail cars. <br />• Emission Factor and Controls <br />The emission factor for active stockpiles is: <br />.u.,,s,,....ry ~~. ~~, 24 <br />