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reserves within the proposed LBA area. Stationary sources of direct emissions at the mine <br />include the following: <br />• Material Handling Conveyors <br />• Mine Ventilation Shafts <br />• Internal Combustion Engines <br />• Fuel Storage Tanks <br />• Material Processing Screens <br />• Material Processing Crushers <br />• Surface Operations (fugitive PM) <br />• Misc. Facility Heating Equipment <br />HAP emissions from stationary sources are considered de minin is. For the purposes of <br />disclosing impacts from the alternatives proposed, insufficient data exists to determine if any <br />portion of the CMM released as VAM or GVB emissions would be considered a hazardous air <br />pollutant. Of the sources identified above, only the fuel tanks, internal combustion engines, and <br />miscellaneous heating equipment would generate HAP emissions. Because of the limited use or <br />the exempt status of the identified units, expected cumulative HAP emissions from these sources <br />would be on the order of pounds per year, and therefore will not be analyzed any further in this <br />document. <br />Mobile sources at the facility include underground mining equipment, listed under source <br />classification code (SCC) 2270009010, aboveground construction equipment identified under <br />SCC 2270002000, as well as light duty gasoline trucks and light and heavy duty (Off - Highway) <br />diesel trucks. The underground mining mobile sources are specialized, industry specific <br />equipment designed to function in the unique environment of an underground mine, while the <br />aboveground sources would be heavy construction equipment used for material handling and <br />stockpile management. <br />To provide acceptable emissions estimates and to fully disclose expected direct emissions from <br />the facility's mobile sources, BLM staff utilized EPA's NONROAD Model (2008a) to generate <br />SCC specific emissions factors (grams per horsepower -hour) for Rio Blanco County based <br />equipment inventories for the year 2008. To estimate emissions from the sources, BLM staff had <br />to determine a reasonable thermal efficiency (TE) for the diesel equipment in order to determine <br />the total horsepower -hours the mine's annual fuel use would provide to the equipment. This was <br />necessary because the annual fuel use was the only fleet specific variable the BLM had to <br />estimate emissions in Table 4 below <br />BME also uses light duty gasoline and diesel trucks (LDGT & LDDT) to ferry personnel, <br />equipment, and supplies around the mine and to conduct daily business. BME provided the <br />annual fuel use (diesel and gasoline) for these sources, however BLM staff could not delineate <br />the minor amount of diesel that would be consumed by the LDDT from the Heavy equipment <br />since no information was available to describe the LDDT fleet characteristics or annual vehicle <br />miles travelled. Therefore, no emissions estimates from these sources are provided; instead the <br />analysis assumes all the diesel fuel is consumed by the heavy equipment, which would produce <br />DOI- BLM -CO- 110 - 2012 - 0023 -EA 21 <br />