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387.8 acres. The total site capacity is based on the difference between the <br /> estimated subgrade excavation and the final disposal area contours.The total <br /> remaining airspace for the Forward Landfill, as of January 2006+e XGG&, is <br /> 30.03 million cubic yards (mcy) (date of last aerial survey was February <br /> 2005 32,3'8,^6^ ^_. Appendix C presents information regarding air space, final, <br /> intermediate and daily cover requirements and remaining refuse capacity. The <br /> remaining site life is based on a refuse to soil volume ratio of 4:1 and a refuse <br /> density of 1,740 pounds per cv(or 0.87 tons per cubic yard). This refuse density <br /> results from a calculation using (1) the Seltember 15 1999 aerial topographic <br /> map of Forward Landfill, (2) the October 6, 2000 aerial topographic map of <br /> Forward Landfill and (3) the total tons of refuse placed in the landfill between <br /> the dates of the two aerial topogralhic maps Forward's consultants compare <br /> the two aerial tomographic maps to estimate the volume of fill (refuse and cover <br /> soil placed during the period between the two aerials. This volume was divided <br /> by the total tons of refusel2laced in the landfill over the same period. This (0.87 <br /> tons per cubic yard) is the lowest in-place density calculated in this manner for <br /> Forward Landfill since 1999 In addition it is important to note that this <br /> calculation produces a conservative (i.e., low) in-place density because the <br /> volume of fill placed is not reduced to account for cover soil. The tons of refuse <br /> are divided into the total volume of airspace filled which includes cover soils. If <br /> the volume of cover soils were subtracted from the volume of fill placed, the <br /> calculated in-place density of refuse would increase(i.e., the same number of <br /> tons were placed in fewer cubic yards of airspace), which would result in a <br /> longer estimated site life. The site capacity calculations reflecting this <br /> information are included in Appendix C. <br /> 4.7 SITE LiFE PROJECTION <br /> 4.7.1 SITE LIFE CALCULATIONS <br /> in order to calculate the site life for the Forward Landfill, the following criteria <br /> was utilized. <br /> • Remaining Site Capacity (with liner, daily, <br /> intermediate and final cover) 32.3-30.03 mcy <br /> • Refuse to Cover Ratio 4:1 <br /> • In-Place Density 1,740 lbs/cy <br /> Forward Landfill JTD 4-12 <br /> j:\Allied\Forwar4TD Amendment\lanuary2006 JTD AmendmentVM Sec 4 012506 Track Changes.doc: <br /> 05/24/02;Amendment No.1: 1/27/2006 <br /> i <br />