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remaining airspace for the Forward Landfill, as of May 2006, is 29.38 million cubic <br /> yards (mcy) (date of last aerial survey was February 2005). Appendix C presents <br /> information regarding air space, final, intermediate and daily cover requirements <br /> and remaining refuse capacity. The remaining site life is based on a refuse to soil <br /> volume ratio of 4:1 and a refuse density of 1,740 pounds per cy (or 0.87 tons per <br /> cubic yard). This refuse density results from a calculation using (1) the September <br /> 15, 1999 aerial topographic map of Forward Landfill, (2) the October 6, 2000 <br /> aerial topographic map of Forward Landfill, and (3) the total tons of refuse placed <br /> in the landfill between the dates of the two aerial topographic maps. Forward's <br /> consultants compare the two aerial topographic maps to estimate the volume of <br /> fill (refuse and cover soil) placed during the period between the two aerials. This <br /> volume was divided by the total tons of refuse placed in the landfill over the same <br /> period. This (0.87 tons per cubic yard) is the lowest in-place density calculated in <br /> this manner for Forward Landfill, since 1999. In addition, it is important to note <br /> that this calculation produces a conservative (i.e., low) in-place density because <br /> the volume of fill placed is not reduced to account for cover soil. The tons of <br /> refuse are divided into the total volume of airspace filled, which includes cover <br /> soils. If the volume of cover soils were subtracted from the volume of fill placed, <br /> the 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 longer <br /> estimated site life. 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 <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) 29.38 mcy <br /> • Refuse to Cover Ratio 4:1 <br /> • In-Place Density 1,740 lbs/cy <br /> Based on the above criteria and utilizing a inflow rate of 32,506 tons/week with <br /> a 2 percent annual growth rate and a maximum weekly permitted refuse inflow <br /> Forward Landfill JTD 4-12 <br /> J:\Allied\Forward\)TD Amendment\March 2006 JTD-LEA Resp\JTD\JTD Sec 4 Final.doc: BRYAN A.STIRRAT a ASSOCIATES <br /> 05/24/02;Amendment No.1: 5/22/2006 <br />