ARCHIVED REPORTS_1995_1 - Laserfiche WebLink

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The January 1904 Preliminary Closure Plan for the site proposes final cover and vegetation layers for the site which meet the minimum requirements of Chapter 15 of Title 23, and Title 14. The Preliminary Closure Plan calls out construction of drainage facilities to be completed during phased closure of the site which will minimize erosion, and also excavation plans which will result in a soil balance for closure requirements of the site. Detailed information on land use for areas near the landfill is contained in Section 2.9 "Compatibility With Fire Requirements, Adjacent Land Use, County Solid Waste Management Plan, And County General Plan" of the 1995 RDSI. B. Site hydrogeologic findings: Hydrogeologic findings at the site consist mainly of a geologic investigation performed by J.H. Kleinfelder and Associates in May of 1985. This report (hereinafter referred to as Kleinfelder 1985) is contained as Appendix E of the 1995 RDSI and RWD . This report contains: (1) A site map indicating locations of test borings (2) Logs of borings (3) Results of laboratory soils tests (4) A summary of the local and regional geology (5) A description of the permeability characteristics of the underlying formation, and (6) Information on the depth and quality of groundwater at and near the site. Additional information on site geologic and hydrogeologic conditions is contained in Appendix G "Well Logs" of the 1995 RDSI and RWD- C. Available soil: The January 1994 Preliminary Closure Plan for the site estimates the daily and intermediate cover soil required to operate the site to completion and to provide final cover for closure of the landfill. The plan assumes that intermediate cover will be stripped and reused for subsequent lifts of refuse. The excavation quantities required were balanced with the final grading plan to achieve a balance between excavation and total soil needs. Existing ground elevations and final grades for landfill construction are shown on the Preliminary Closure Plan drawings. These calculations are based on existing ground and earthwork cut elevations to achieve a soil balance for the landfill's development and closure. The design excavation grades are sloped to promote interim drainage and to balance soil needs at the end of each modules' construction shown on the Preliminary Closure Plan. The soil excavation grades balance earthwork quantities shown in Table 1, and assume that sufficient clay soils meeting geotechnical specifications will be available in excavated soils to supply the soil needs for construction of the 12 inch thick clay layer of the final cover. This will be verified by soils testing as new areas of the site are excavated and developed. Suitable soils to serve as the clay layer for 11