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be <br /> As the new cells are filled, additional vertical extraction wells will be extended as <br /> ed in <br /> phases to control surface landfill gas emi Thesewells <br /> relplaced with new wells <br /> the fill progresses in the cell, or may be abandoned <br /> when the fill reaches the final grade elevation. <br /> As the fill progresses above the existing and now-lined refuse prisms, additional <br /> vertical extraction wells will be placed into the upper portions of the landfill to <br /> achieve the proper spacing required for surface emissions control. <br /> Permits will be obtained from the San Joaquin Valley Air Pollution Control' <br /> District (SJVAPCD) and other appropr <br /> iate 'ageTmjes=(ovahe construction.and <br /> operation of each phase of gas system development. <br /> 5.3 DESIGN CALCULATIONS <br /> 5.3.1 SOIL BALANCE <br /> Soil excavated from each phase (Table 9) will be stockpiled in areas of°future <br /> phases or on the-former-borrow-area lnQrh of the existing Austin s in ° 4i11 <br /> This stockpiled soil (estimated total excavation quantities areapproximately <br /> mcy), can be utilized for daily cover operationsf,if"eeded, or will be saved for <br /> final cover soil,n.eeds.(,a roximatel 564,974 cy). The existing Forward Landfill <br /> ,Pp y <br /> currently accepts construction debris and conta t"soil in 0 presents�phase fill and <br /> cient <br /> quantities to pr�ovid�e#or,-daily cover operations. Table <br /> soil volumes required for each phase as well as soil available onsite arid"imp0'rt <br /> or borrow required. Any soil surplus or`deficitwill be stockpiled/borrowed from <br /> the existing borrow area located northofthe existing Austin Road Landfill. See <br /> Appendix C for landfill capacity/soil calculations. <br /> 5.3.2 STATIC AND SEISMIC STABILITY <br /> The stability of the proposed expanded Forward Landfill facility ared evaluated <br /> BAS and <br /> available <br /> y <br /> Geologic Associates (GLA) based on development <br /> a pd linerlans materials. As <br /> available information regarding likely <br /> required in 27 CCR, the analyses addressed both the surficial stability oe annal <br /> alyses <br /> cover soils and the gross stability of!o dpnanned conditions, and expansion. The <br /> evaluation <br /> is considered static and pseudo static g <br /> of the seismic displacement that could occur under earthquake loads. <br /> 5-13 <br /> Forward Landfill JTD <br /> L:\Allied\2000.193\Reports\finaljtd:Sec-5.0:08/22/01 nSSc3C1 -T <br />