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Solid Waste Disposal <br />All solid waste (non-coal wastes), e.g., lumber, unusable machinery, and waste building <br />materials, will be temporazily placed in Section 3 of the pit area. At the time backfilling <br />of the C-1 pit begins, the solid waste remaining in the dump will be placed in that pit. <br />However, during the interim period between the time waste is first placed there and the <br />time backfilling the C-1 pit begins, all wood that can be salvaged or used as home heating <br />fuel will be given to employees of Oakridge. All metals that are not usable will be sold as <br />scrap metal. Any remaining solid waste will be relocated in the C-I pit and covered with <br />spoil. After this original solid waste dump is disposed of, future solid waste, as <br />described, will be placed directly in the pit concurrently with the backfilling. Solid <br />wastes that aze flammable, e.g., paints, grease, oils, cleaning fluids, etc., will be hauled <br />directly to the La Plata County Dump as such waste occurs. OEI may at its sole <br />discretion construct a pit to hold and neutralize solid waste. The pit will be constructed in <br />accordance with the recommendations of the Department of Health and will use the <br />neutralizing agents so recommended by the Department of Health. The pit is expected to <br />be no lazger than 25 feet by 25 feet and will be lined with a synthetic impervious material. <br />Berms and barriers will be constructed in accordance with Department of Health and <br />NPDES permit requirements. <br />Mine Openings <br />There will be no mine openings that require sealing. All exploration holes will be <br />plugged in accordance with 4.07. All water or monitoring wells will be plugged in <br />accordance with 4.07 or transferred to the post-mining surface owner who will be <br />responsible for their maintenance and permitting as necessary. <br />Dry drill holes will have all cuttings backfilled. An expandable plug will be forced into <br />the hole to a depth of ten feet. A standard sack of cement will be mixed with water and <br />poured into the hole. The upper three feet will be filled with soil. Wet drill holes (+1 <br />gpm flow) and monitor wells will be cemented to at least 50 feet above the water-bearing <br />zone or to within ten feet of the surface. The top ten feet will be sealed as described for <br />dry drill holes. <br />Air Quality <br />Air quality control will be accomplished by sprinkling all road, or other affected areas <br />from which fugitive dust will occur with water or hazd-surfaced. There will be no stack <br />emissions from coal burning; and coal conveyor, washer plants and crashers will be <br />covered and wetted to prevent coal dust and/or fines from being emitted into the air. <br />Refer to 2.05.6, Mitigation of the Impacts. <br />TROB, TRl l (v 1.0) 5-41 Revised 9/97, 8/02 <br />