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will have significantly less nuisance impacts on adjacent properties. A land- <br />fill of significant size that accepts only residuals could be in operation for <br />much longer than ten years. <br />LANDFILL DEVELOPMENT SCHEDULE <br />Table 4-12 displays the the amount of solid waste that the Council estimates <br />each county will need to landfill assuming the waste reduction/recovery sched- <br />ule is implemented. Several assumptions provide the basis for calculating the <br />volumes estimated in Table 4-12. Residuals will be produced from any recovery <br />technology due to facility downtime, materials rejected because they are not <br />marketable, or ash from energy recovery combustion. For the period from 1985 <br />through 1990, it is assumed that 40 percent of all waste handled by reduction/ <br />recovery technologies will be returned as residuals still requiring landfill- <br />ing. For the period from 1991 through 2000, it is assumed that this rate is <br />lowered to 30 percent of the waste received will be returned as residuals due <br />to the development of complementing technologies such as co -composting and <br />energy recovery. <br />Total landfill capacity needed for the region from 1985 through the year 2000 <br />is 20,(')5 acre-feet. Currently the capacity of the existing landfills is <br />estimated at 13,360 acre-feet, not including any of the proposed expansions that <br />have approval decisions currently pending. Consequently, 7,245 acre-feet of <br />new canxcity is needed to meet the region's needs. The assumptions are that <br />unpra.. ed waste and residuals will require one -acre foot of landfill space <br />for evo..7 806.5 tons and existing landfill capacity remaining as of January 1, <br />1985 is 13,360 acre-feet. <br />Table 4-13 shows the landfill development schedule for each county in terms of <br />number and capacity of landfills. If -he need for new landfill space is <br />reduced, the capacity allocations will be adjusted accordingly. Also, it is <br />assumed that new landfills will be permitted in phases of capacity increments <br />that will allow for implementation of any reductions made to this development <br />schedule. The total regional capacity limitation of 7,245 acre-feet cannot be <br />exceeded. The capacity allocation to one county may be substituted as long as <br />there is a corresponding reduction of capacity in another county. <br />The opening dates in the development schedule should be considered as approxi- <br />mate guidelines for planning purposes. While the capacity allocations are <br />based on the region's needs through the year 2000, it is important to under- <br />stand that the life of the facilities could extend beyond that date. The <br />capacity allocated is for the disposal of residuals from waste processing and <br />recovery activities. To allow for the development of large-scale, centralized <br />processing facilities, however, short-term disposal of unprocessed waste on an <br />interim basis may be approvaole in some circumstances. Alternatives for as <br />much of the capacity as possible must be pursued by the Council and the metro- <br />politan counties. While this capacity may be best suited for disposal of resi- <br />duals, recycling of the ash may further reduce the needed landfill capacity. <br />Also development of private sites may reduce needed capacity. <br />IA <br />