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II. Project Description <br /> ` this project and therefore will not be analyzed in this IIR. No sludge treatment facility is <br /> t included in the conceptual design for the Austin Road Landfill expansion. <br /> The Department is currently managing its sewage sludge by hauling it to an agricultural user in <br /> Merced County. The Department is currently developing its long-term sludge management <br /> plans,which may include composting and co-composting. The facility for this procedure is <br /> anticipated to be sited adjacent to the wastewater treatment plant. The composted material could <br /> be utilized in agriculture,for daily cover at the landfill,or as a soil amendment to aid in <br /> revegetation of the final cover at the landfill. <br /> It is possible that both the Department and the DPW may wish to site the composting and co- <br /> composting facility at the Austin Road Landfill in the future. Therefore,in the conceptual site <br /> layout,approximately 13 acres are delineated for future composting and/or co-composting <br /> operations. This facility could include receiving and short term storage areas,a greenwaste <br /> sorting area,a mixing area,windrow composting and curing areas,storage and loading areas for <br /> the composted material,and an equipment area. The anticipated quantity of sludge and <br /> greenwaste,in 2010,is approximately 30,000 tons per year and approximately 28,000 tons per <br /> year,respectively(R.W.Beck and Associates, 1993). Any future composting and/or co- <br /> composting operations would require separate environmental review. <br /> LANDFILL DESIGN <br /> The design of the landfill is based on a preliminary conceptual design. If major changes to the <br /> preliminary conceptual design are implemented,subsequent environmental evaluation would be <br /> required. <br /> Design elements for the proposed horizontal and vertical expansion of the landfill include <br /> excavation,base liner,leachate collection,erosion control,surface water control,and landfill gas <br /> control . <br /> v . <br /> The applicant estimates that planned excavations at the proposed landfill and proposed borrow <br /> area north of the existing landfill would provide sufficient borrow soils for the construction of <br /> the soil components of the proposed base liner system,and provide sufficient material for daily, <br /> intermediate,and final covers for the proposed landfill. The base grading plan calls for <br /> II.7 <br />