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Air PrrmC AyV/iomiaelar Loracffi foal CarRrwY <br />TABLE 4 <br />LORENCITO CANYON MINE <br />SURFACE MINE OVERBURDEN REMOVAL <br /> Annual <br /> Surface mine °Aa oC five-year overbtaden <br /> area surface mine Overburden removal emissions <br />Year (acres) area' removed (tons): (tons) <br />First 134.98 40.7 32,071,283 96.21 <br />Third 30.53 9.2 7,249,529 - 21.75 <br />Fourth 72.54 21.9 17,257,030 51.77 <br />Fifth 93.30 28.2 22,063,782 66.19 <br />'Total surface mine azea for the five-year permit term is 331.35 acres. <br />=Total overburden removed during five-year permit term 60,614,787 yd'. One yd' overburden = 1.3 toot (APCD <br />Fugitive Particulates Emissions, Appendix C). Therefore, tons of overburden removed during each yeaz = <br />78,799.?23 tons • (annual surface disturbance/total five-yeaz disturbance). <br />Emission Factor and Controls <br />The emission factor for overburden removal is: (0.5 * 0.012 lb/ton)/2000 Ib/ton (A]P~2, Table <br />8.24-4, dated 9/88). No controls are practicable. <br />Annual Emissions <br />As shown on Table 4, the annual emissions will vary from a maximum of 96.21 tons during the <br />fust year to a minimum of 21.75 tons during the third year. <br />Overburden Stockpile <br />Overburden will not be stockpiled. Rather, it will be used to backfill areas as surface mining is <br />completed in sequential order. Emissions from overburden are included in the emissions from <br />exposed areas. <br />Drilling Coal <br />Process Description <br />• <br />C~ <br />To prepare for blasting, an average of 90 holes per days will be drilled to a depth of 2'.0 to 30 feet. • <br /> <br />