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local landfill area according to the local rules and regulations <br />• governing such waste disposal. Petroleum products such as grease, <br />lubricants and machine oil are collected by an approved waste oil <br />pickup service for refinery recycling. <br />(g) Mine openings will be permanently sealed as part of the facilities <br />removal phase of reclamation consistent with 30 CFR 75.1711. Mine <br />portals and other mine openings are identified in Exhibits 6A through <br />11 A and 58, Tab Section 13. The openings will be sealed using an <br />MSHA approved concrete-block bulkhead or by completely filling the <br />entry for a minimum of 25 feet with incombustible material. The <br />design for mine opening permanent seals is depicted in Figure 14-2. <br />The shaft shown on Exhibit SL-16-009, Tab Section 13, will be <br />backfilled with dirt to within 5' of the surface and a concrete plug <br />poured in the top 5'. This plug will be covered with a minimum of 4' <br />of dirt. <br />• The Northwest Intake portal was sealed in May 1990, but was not <br />reclaimed until the mine filled with water to the portal elevation. The <br />water level reached the portal near the end of 1992 and long term <br />drainage through a 6" siphon was established as NPDES outfall 002. <br />The water discharged at outfall 002 originates in up-dip sections of <br />the South Portal in the No. 2 and No. 4 South Mains. The siphon <br />discharge has adequately handled the water generated in the mine, <br />however some water from the South Portal has been consumed in <br />the wash plant and mine and discharged through Outfall 001. Figure <br />14-9, Roadside South Portal, Mine Inflow Rate Determination, shows <br />a 300 gpm maximum mine inflow for the period 1993 through 2000, <br />based on metered outfall discharge and consumptive use. The <br />Northwest Intake Siphon with a maximum flow rate of about 220 gpm <br />will not be able to handle the maximum flow. <br />• 14-29 (Rev. 01 /26/01) <br />