Laserfiche WebLink
mcy), can be utilized for daily cover operations, if needed, or will be saved for <br /> final cover soil needs (approximately 564,974 cy). The existing Forward Landfill <br /> currently accepts construction debris and contaminated soil in sufficient <br /> quantities to provide for daily cover operations. Table 10 presents phase fill and <br /> soil volumes required for each phase as well as soil available onsite and import <br /> or borrow required. Any soil surplus or deficit will be stockpiled/borrowed from <br /> the existing borrow area located north of the 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 was evaluated by <br /> Geologic Associates (GLA) based on development plans prepared by BAS and <br /> available information regarding likely refuse, soils, and liner materials. As <br /> required in 27 CCR, the analyses addressed both the surficial stability of final <br /> cover soils and the gross stability of the planned landfill expansion. The analyses <br /> considered static and pseudo-static loading conditions, and included evaluation <br /> of the seismic displacement that could occur under earthquake loads. <br /> 5.3.2.1 SEISMICITY <br /> An assessment of the seismic exposure for the Forward Landfill site was <br /> completed by GeoSyntec Consultants (2001) and is included in Appendix E. <br /> Based on that assessment, two potential earthquake events were considered for <br /> design: a MCE of Mme, 7.9 associated with the San Andreas Fault at a distance of <br /> about 70 miles; and a Mme, 6.7 earthquake associated with the Great Valley Fault <br /> at a distance of about 21 miles. The following parameters were used in the <br /> seismic slope stability evaluations: <br /> San Andreas Fault Event Magnitude (M,,,) 7.9 <br /> Peak Horizontal Bedrock Acceleration 0.09 g <br /> Duration of Significant Shaking (D5-y5) 45.4 sec <br /> Great Valley Fault Event Magnitude (MW) 6.7 <br /> Peak Horizontal Bedrock Acceleration 0.13 g <br /> Duration of Significant Shaking (D5.95) 15.3 sec <br /> Forward Landfill JTD 5-14 <br /> L\Allied\2000-193\ReporisNJTD-PCPCMP702:Sec-5-0:5/24/02 <br /> Revision 1:07/16/02 <br />