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0 <br /> ratio for a properly operated sanitary landfill(i.e.,a sanitary landfill that does <br /> not receive violations for inadequate cover). As discussed above, Forward <br /> utilizes a number of other materials which are used as alternative daily cover <br /> including, but not limited to, construction and demolition waste,TASK ash <br /> and cement kiln dust, shredded tires,synthetic tarps,compost materials(off <br /> spec-delivered by generator),and PGM. Predominately, Forward utilizes soil <br /> and the following ADC materials, PGM.TASW, synthetic tarps and shredded <br /> tires. Forward utilizes a refuse-to-cover ratio of 4:1 for purposes of calculating <br /> the landfill's remaining capacity and site life. In addition,the remaining waste <br /> capacity and site life are reviewed annually by Forward and are required to be <br /> updated in accordance with 27 CCR,Section 21640, in conjunction with a <br /> review of the solid waste facilities permit every five years. <br /> 4.6 SITE CAPACITY <br /> As previously discussed,the disposal area footprint consists of approximately <br /> 354.5 acres. The total site capacity is based on the difference between the <br /> estimated subgrade excavation and the final disposal area contours.The <br /> total remaining airspace for the Forward Landfill,as of the last aerial suregy Detew:D�ecWembwW 1,2007, <br /> _Mdlion,cubic yards_(mqy),,,Ies1s1 liner final,-cover volumes. -The-date: <br /> of last aerial survey was arch 17,2011. Appendix C presents informationDekftd:42 <br /> - <br /> eletwl: <br /> regarding air space,final, intermediate and daily cover requirements and DFebruary 2007 <br /> remaining refuse capacity. The remaining site life is based on a refuse to soil D." <br /> volume ratio of 4:1 and a refuse density of 1,7A_8 pounds per cubic yard. �4, , , C� <br /> Forward's consultants compare the two aerial topographic maps to estimate <br /> the volume of fill(refuse and cover soil)placed during the period between the <br /> two aerials. The site capacity calculations reflecting this information are <br /> included in Appendix C. <br /> 4.7 SITE LIFE PROJECTION <br /> 4.7.1 SITE LIFE CALCULATIONS DeKtedt 12 <br /> Dek*ed <br /> In order to calculate the site life for the Forward Landfill,the following criteria i Dekftd.07 <br /> 4 <br /> was utilized. Dekited. <br /> Dekftd.2 <br /> • <br /> Delebed: WIsed CTS <br /> ZAPROJE <br /> Remaining Site Capacity as of 3;7 23 1 <br /> mcy WastoUN81013 5 yr Rmnew <br /> djTD Sm I�d- <br /> _P��JTDAm. <br /> F.,,.,d LanWl JTD 4-13 <br /> 'M ...... <br /> W= m <br /> 024=,�AMM,1�,,t N.,1, V1 <br />