ARCHIVED REPORTS_1988_4 - Laserfiche WebLink

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to include daily cover soil, are estimated to be one third of the original gate volume. This estimation was made using data obtained from similar sites. To date, a detailed estimation of the Corral Hollow Sanitary Landfill compaction factor has not been performed. This factor will be determined in the future using land or aerial survey methods to calculate the change in landfilled waste over time. This change will be compared to gate quantities to determine the actual compaction factor for the landfill at that time. b) Waste Settlement Rate: Information on settlement at the landfill is contained on pages 14 and 15 of the Closure Plan for the site, which is contained as B to the RWD for the site. The RWD is included as Appendix C of this Engineering Review. The actual waste settlement rate at the Corral Hollow Sanitary Landfill has not been determined. c) Ratio of Waste to Soil Volume: The ratio of waste to soil volume used for design of the landfill Closure Plan was 4: 1. This factor was estimated based on soil requirement observations at similar landfill operations. This factor assumes that intermediate cover in excess of the 6 inches required for daily cover will be stripped and reused when these areas are covered with subsequent landfilling. d.) Stockpiling of soil: The soil required for operations and closure of the landfill will be imported and stockpiled in northeast portion of the site. This location is shown on Drawing 1 of the Closure Plan. This stockpile will be used by the landfill earthmoving scraper to obtain cover soils and will be replenished with off-site soils as required. e. ) Permeability of cover soil: The soils used for daily or intermediate cover have permeabilities which vary. The placement methods and permeability of the final cover are discussed on pages 15 through 17 of the Closure Plan. The soils used for the clay layer must have permeabilities of 1 X 10-6 cm./sec. or less after field compaction. This 37 l