ARCHIVED REPORTS_2004 - Laserfiche WebLink

Home Browse Search

prevent surface erosion, control and intercept run-on, and take into account planned final designs. • Seismic Design The units will be designed to withstand the maximum probable earthquake without damage to the structures that control leachate, storm water, erosion, or gas. • Maximum Height The maximum height of the refuse fill was previously established by the County at 65 feet above "surrounding grade" (Report of Waste Discharge, San Joaquin County, July 1989). Surrounding grade is assumed to be the highest original elevation within the footprint of the landfill when originally permitted: 125 ft MSL; therefore, the original permitted height limit established by the County is 190 ft. MSL. The County will seek to raise the permitted height limit to an elevation of at least 258 ft MSL, subject to regulatory approval, satisfactory slope stability analysis and other relevant design issues. This has an impact on the Preliminary Closure/Post Closure Maintenance Plan which will be revised based on the final height. 6.4 CONSTRUCTION SEQUENCING PLANS 6.4.1 Excavation/Stockpiling Plans During the design of each module, an excavation plan and a stockpile plan is developed. Excavation plans include the earthwork slopes and base grades, liner limits, LCRS systems, perimeter berms, haul ramps, drainage ditches and storm water basins, and locations of ancillary facilities. The stockpile plans show the grading contours for temporary placement of the surplus soils excavated from the modules will be placed. The current stockpile location is shown on the Site Plan(Plate 2). 6.4.2 Base Preparation/Liner Placement Plans Each module is separately designed and submitted for approval based on the requirements of the state regulations and current permit (Waste Discharge Requirements) at the time of submittal. North County RC&SL Page 28 of 48 Public Works/Solid Waste JTD County of San Joaquin—November 30,2004