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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-Fet2AA6, is <br /> 30.03 million cubic yards (mcy) (date of last aerial survey was February <br /> 2005)32,338,460 ey. 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 cy (or 0.87 tons per cubic yard). This refuse density <br /> results from a calculation using (1) the September 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 topographic maps Forward's consultants compare <br /> the two aerial topographic 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 refuse placed 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 Dlaced 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) 31.3-30.03 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\Forward\)TD Amendment\January2006 JTD Amendment\JTD Sec 4 012506 Track Changes.doc: <br /> 05/24/02;Amendment No.1: 1/27/2006 <br />