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8. Drainage within the facility is contained on site and/or discharged off-site in accordance with applicable stormwater regulations. The County intends to discharge runoff off-site at the three pre -project locations (Drawing 1). 9. Maximum refuse fill depths over LCRS piping within the Modules are as follows: Module Maximum Refuse Fill Depth Maximum Elevation Allowed Over Module Base (Approximate - msl) Module 1 136 ft 235 ft (Previously designated "1 &2") Module 3 166 ft 230 ft Module 4 228 ft 300 ft Modules 5 —11 254 ft 320 ft 2.5.3 Interim Development The existing access road, entrance facilities, and central access corridor to the module areas will be retained for sequential excavation, base liner development, and waste fill operations within remaining Modules 5 through 10. The final access road will be constructed up the northerly face and across the top deck of Module 1 to allow refuse vehicle access to upper areas of Modules 10 and 11 near the completion of landfill operations at NCRCSL. Soils will be excavated as needed for landfill operations, in sequence from Module areas 5 through 11. In general, each module area will be excavated to approximate base grade by the removal of soil for daily and intermediate soil cover needs, in advance of the need to construct the next base liner area for additional lined disposal capacity. The Excavation Plan provides about 7,963,000 cubic yards of soil, which is more than adequate for the development, operation, and closure of the proposed vertical expansion of the landfill (Table 1). The existing central access corridor will be extended south with ramps down to the base of each module area for initial equipment access and separate, but parallel, refuse vehicle access. After each lined area is developed and filled above original ground level, access roads will be extended up the interior slopes of the refuse fill to upper fill elevations (Drawing 2). To facilitate construction, operation, and closure of the final landfill area, soils excavated from Modules will be stockpiled at a location that facilitates use during closure. At this time, the County contemplates acquiring access to a portion of the property immediately to the east of the site, although the land owner has not been contacted at this time. If an adjacent land area is not available for soil stockpiling, provisions will be made to stockpile a minimum of 1,000,000 cubic yards of soil on the upper areas of Modules 8 and 9, above or below final landfill grades. PCMP for NCRCSL 2-5 Department of Public WorksrSolid Waste 0ASan Joaquin Coun6ANCRCSLU 180401PCPMRFinal ReporAPCPMP_Rev_Jan_2010. Doc County of San Joaquin -January 7, 2010