Agenda - 02-10-1998 - Attachment 3h

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5.2 Permitting Requirements The permitting requirements for a CDLF are provided in Solid Waste Management Rule .0503 and .0504, except that a CDLF does not require a base liner, a leachate collection system, or a landfill gas management system. The major permitting requirements are listed below. Local_ Area S=dv, providing information such as land use and zoning, existing development, wells, topography and floodplains, within a one - quarter mile radius of the site. • Regional_ Area Sttldy, providing information such as groundwater users, water intakes, potential groundwater or surface water polluters, and subdivisions, within two miles of the site. • HvdAmeolog ci Study, including a minimum of one boring per ten acres, at least boring to a depth of 50 feet, soils labororatory testing, static water levels, geologic cross- sections, and a hydrogeologic evaluation. Landfill Design Plan, including drawings and discussion related to site construction, operation, maintenance and closure. Local Government Approvals. Since the site is located within the extraterritorial jurisdiction of the Town of Chapel Hill, zoning approval would be required by Chapel Hifl. 5.3 Conceptual CDLF Design Plan We have prepared a conceptual landfill design plan for a CDLF based on digitized USGS topography and the available boundary information. -Buffers for this type of facility are 200 feet from the property lines, and 500 feet from residential dwellings and wells. Because of the existing and potential for residential development on all sides of the site, we have assumed 500 foot buffers- on all sides (except against the existing landfill). The 500 foot buffer on the eastern side includes the 100 foot right of way for the railroad. Drawing No. 2 shows the layout of the landfill footprint on the Greene tract, as well as a suggested location for a transfer facility and a material recovery facility on the Neville tract. (Note that Drawing No. 3 shows another option for a CDLF to be located immediately adjacent to a lined MSWLF unit.) The CDLF footprint shown on Drawing No. 2, titled C &D Landfill Option - Conceptual Closure Plan, encompasses approximately 67 acres. The maximum height of the landfill was limited to elevation 610 feet to be consistent with the permitted height of the adjacent South Eubanks Road landfill; however, the site could support a landfill with a maximum elevation of 710 feet. The total airspace of the landfill, using the grading plan indicated on Drawing No. 2, is approximately 4,300,000 cubic yards (cy). Using an assumed waste density of 1200 pounds per cubic yard (pcy) and a waste -to -cover ratio of 9:1, the total C &D waste volume in the landfill would be approximately Study of Solid Waste Management Options JOYCE ENGINEERING, INC. for the Greene and Neville Tracts February 4, 1998 Orange County, North Carolina 6