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As of August 2004, approximately 91 million cy of capacity remained. This capacity is based on a maximum height restriction of 432 ft MSL and a bottom elevation of 230 ft MSL. Daily and intermediate soil cover requires approximately 20% of in-place volume. The net remaining capacity (total capacity minus daily cover soil) is approximately 76 million cy. This is based on the County goal of in-place refuse density of 1,100 pounds/cy. Projected waste accumulation is shown in Table 3. The remaining capacity was calculated by subtracting the volume filled in Module "I" and Module 1 from the total capacity. The excavation volume and volume filled were calculated using the average end area method using an average bottom elevation of 230 ft MSL with the existing contours shown in Plate 2.1. Volume calculations are in Appendix M and are stamped by a Registered Civil Engineer. These calculations do not include either the volume of the LCRS (including operations layer) or final cover. Daily cover is included in the calculations at a waste to soil ration of 4:1. 4.3. SITE LIFE ESTIMATES is Based on a waste rate of 790 tons per day in 2004 with a rate of increase of 3% per year, a refuse density of 1,100 pounds per cy, and a 4:1 waste to soil ratio, Foothill Sanitary Landfill should reach capacity in approximately 2059 (Table 3 and Plate 4). This estimate is based on the present height limit of 432 ft. MSL established by the County; however, the County intends to seek an increase in that limit. 4.4. SOIL AVAILABILITY Total daily and intermediate cover needs, based on the waste quantities above, are estimated to be 15.4 million cy. This is based on the approximation that daily and intermediate cover needs are 20% by volume of in-place waste. The current sources of daily cover are on-site excavation in future cells. The on-site sources of cover from excavation of the future modules are estimated to be approximately 35.6 million cy (see Appendix M). This would provide an abundance of soil cover. No imported fill is anticipated for daily, intermediate, or final cover (Table 3). On-site 0 Foothill Sanitary landfill Page 17 of 62 Public Works/Solid Waste JTD County of San Joaquin — Revised 10/6/05