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'.`a.3' RFT <br />R <br />OVERVIEW OF THE SOLID WASTE MANAGEMENT SYSTEM <br />In order to estimate the remaining waste disposal capacity of Segment II, daily, interme- <br />diate, and final cover needs to be taken into account. For purposes of this evaluation, a <br />cover system composed of 6 inches of topsoil, an 18 -inch drainage layer, a composite <br />drainage net, a 40 -mil geomembrane limiting layer, and an 18 -inch intermediate soil layer <br />has been assumed as the final landfill cover system. This 3.5 -foot thick cover system will <br />occupy a volume of approximately 5,650 cubic yards per acre of landfill closed. For Segment <br />II without the infill, the cover system will occupy approximately 141,000 cubic yards <br />yielding a disposal capacity of 1,480,000 cubic yards. For Segment II with the infill, the <br />cover system will occupy approximately 218,000 cubic yards yielding a disposal capacity of <br />2,903,000 cubic yards. <br />2.6.1.1 Landfill Volume Surveys <br />Volume surveys have been conducted periodically throughout the operating life of <br />Segment II of the landfill to evaluate the rate of filling and to estimate remaining life (see <br />Tables 2-4 and 2-5). The most recent volume survey was conducted in July 1995 by <br />Masteller, Moler & Reed, Inc. (see Appendix G). The survey report indicated that <br />1,021,000 cubic yards of waste had been placed in Segment II as of July 1995. Based on this <br />survey information and deducting for the cover system volume, this left approximately <br />459,000 cubic yards of the original Segment II capacity available as of July 1995. If the infill <br />is permitted, the remaining capacity as of July 1995 would have been approximately <br />1,882,000. <br />2.6.1.2 Landfill Life <br />In order to estimate remaining landfill life, future waste tonnage had to be projected and <br />converted to volume. Waste tonnage was projected based on population projections from <br />the University of Florida, Bureau of Economic and Business Research (BEBR) assuming that <br />future per capita waste production remains constant at the average rate between FY 1992-93 <br />and FY 1994-95 (1.18 tons per capita per year). As indicated in Tables 2-4 and 2-5, waste <br />density within Segment ll has been approximately 1,450 pounds per cubic yard (lbs/cy) <br />based on historical volume survey and waste disposal information. In order to project <br />future waste volume, a density of 1,200 lbs/cy has been used. A 20 percent allowance has <br />been factored into the projections to account for the volume loss due to application of daily <br />cover. Lower than historical compaction density and a daily cover allowance were used for <br />the future volume projections because: <br />GNv/1000847.00C 2.15 <br />'J7��2 ..� .:�•�'l:!,,Ai+;-:L .'Srw 1,Y-iXi�',:�.�'1•ia .. °1 q' „J_' Snrwa <br />