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r r Ceosyntec Consultants r 2. IRC SOLID WASTE MANAGEMENT PLAN The latest update of the IRC solid waste management master plan [Neel-Schaffer, 2007] , which ■+ was adopted by the SWDD Board on 20 March 2007, specifies four distinct footprints of landfill facilities within the 270- acre landfill site as follows (see Figure 1 ) : ` • Existing 59-acre Class I landfill consisting of Segments 1 and 2, and an Infill; r • Existing 22- acre unlined C&D disposal facility — Cell 1 , currently inactive; • New 33 -acre unlined C&D disposal facility — Cell 2, recently permitted and under construction; and • New 44- acre lined Class I landfill — Segment 3 , currently under design and r permitting. The existing Class I landfill is active and presently accepts for disposal both C&D debris and MSW. The C&D debris is placed on the side slopes and top of the unlined Segment 1 . MSW is placed on the side slopes and top of the lined Segment 2 and the Infill . Under the separate disposal scenario, Segments 1 and 2 and the Infill of the existing Class I landfill and Cell 1 of ` the C&D landfill are expected to provide all the disposal capacity needs of the County through 2010. Thereafter, Class I waste will be disposed in the lined Segment 3 and C&D debris in the unlined Cell 2 . The C&D disposal facility Cell 2 has a projected useful life of 18 years compared with the 26-year capacity projected for the Class I landfill Segment 3 . Two additional infills are also proposed between Segment 3 of the Class I landfill and each of the r two C&D cells to maximize the disposal capacity of the site (see Figure 2) . The two infills are planned for construction and operation as Class I landfills and projected to provide six years of additional disposal capacity for the County. Further disposal of C&D debris, after the ` completion of Cell 2, will have to be in a Class I landfill commingled with MSW . r Under a co -disposal scenario, Cell 2 , presently scheduled for operation as a C&D disposal facility, will be integrated into Segment 3 and constructed as a Class I landfill . Once the existing C&D disposal capacity of Segment 1 and Cell 1 of the C&D disposal facility is depleted, an event scheduled to occur in 2010, further C&D debris disposal will be in a Class I landfill commingled with MSW. ` The principal drawback to the co-disposal approach is the high capital and operating costs of the Class 1 landfill in comparison with those of a C&D disposal facility. These, however, r would be offset by the savings that would result from the discontinued operation of the separate FL0996-03/JL70184 08- 10-2007.doe.doe 2-1 2007-08- 10