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West Elk Mine containment) polyethylene tanks are located west of the loadout building to contain antifreeze • (diethylene glycol) for treatment of coal and railcars for winter shipment. One 12-foot diameter tank contains approximately 15,000 gallons of antifreeze to spray on the coal as it is loaded. Another 12-foot diameter tank contains approximately 9,800 gallons of a thicker antifreeze to treat the railcazs prior to loading. A concrete clean-up bunker is located to the east of the loadout building. The bunker is used to clean-up coal that occasionally spills during the loading process. The spilled coal is loaded into a truck and hauled to the main mine site. (8) Coal Processins Waste and Non-Coal Processine Waste MCC generates waste or refuse during underground construction activities and mining. Underground construction activities include building ventilation overcasts or undercasts, ventilation shafts or tunnels, access slopes, and roadways or haulage ways. Mining produces refuse material from the roof and floor surrounding the coal seam. Although underground construction activities and mining constitute the primary sources of refuse material, some refuse is generated from other mine activities. Other sources of refuse material aze contaminated coal spillage, sediment pond dredgings, soils contaminated with non- hazazdous materials (e.g. petroleum products) and limited mine development or coal processing wastes from neighboring operations, if comparable in chazacteristic to West Elk Mine's refuse. These additional sources make up a very small percentage of the total amount of refuse produced at West Elk Mine. During the operational life of the mine to date, refuse has been disposed of in several permitted locations. They include the Bear No. 2 Mine portal bench, the Blue Ribbon Mine bench stabilization and backfill, and West Elk Mine's portal bench mine supply storage area fill and the run-of--mine stack tubes coal storage area fills. Coal refuse was once stockpiled in the initial waste rock storage azea (maintenance shop bench), but all refuse or waste was removed before construction of the earthen fill to make a pad for the shop. Coal refuse is transported from the mine on the run-of--mine belt and/or is hauled with equipment out of the main portal. This refuse may be temporarily stockpiled in the screening plant reject bin or on the stack-tube bench, and on the portal bench or in the nearby concrete bunkers, respectively. The amount of coal refuse produced is variable. The refuse material that accumulates in the temporary storage areas, is hauled by truck to the permanent refuse disposal azea. Three permanent refuse disposal azeas and one development waste pile are permitted at West Elk Mine. Initially, refuse was temporarily stockpiled in an area formerly called the U.S. Steel laydown area. This area has been enlazged and converted to a permanent refuse pile called the Lower Refuse Disposal Area or Lower Refuse Pile (LRP). A permanent refuse pile is also permitted for the meadow above the portal bench. This azea is referred to as the Upper Refuse Disposal Area (URDA). Although this upper refuse disposal area has been approved for construction, it is not yet needed. Thus, construction of the Upper Refuse Disposal Area will occur in the future, if needed. All construction infonnation about these two disposal azeas is contained in Exhibit 50 (URDA) and Exhibit 51 (LRP). As MCC believed that the Lower . Refuse Pile would reach its maximum storage capacity in 1997 (and before completing construction of the ventilation shafts in Sylvester Gulch), a third refuse disposal area was 2.05-39 Revised November 1004 PRl0