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Table 3 Volumetric Capacity And Other Pertinent Information is Foothill Sanitary Landfill Gross Landfill Volume 138.0 Million CY Volume between final closure surface and base grade excavation Volume of "Soil -Only" Layers 8.2 Million CY LCRS and base operations layer 3 feet thick Final Closure Cap (ET type) 4.5 feet thick Area of Closure Cap and Ops Layer (each) 674 acres Total Landfill Refuse Capacity: Gross Landfill Volume less "Soil -Only" Layers: 129.8 Million CY Refuse Capacity Consumed through June 2010 12.8 Million CY Gross volume consumed 13.0 million cy Ops layer placed 40 acres (0.2) million cy Refuse Capacity Remaining (Topography date: June 10, 2010) 117.0 Million CY Future Soils Requirement Base Liner Operations Layer and Closure Cover (See Table 4) 6.8 Million CY Daily and Intermediate Cover Soils 20% of refuse -and -soil fill 26.0 Million CY Total Future Soils Required 32.8 Million CY Soils available from planned excavation 49.1 Million CY Net soil reserve (excess above need) 16.3 Million CY QROFESS/pNq �i No. 41876 'r CIV\\- OF_r'Y Other Pertinent Information Final refuse footprint (1) Present refuse fooprint Maximum permitted height Lowest elevation of refuse (design) Elevation of groundwater at lowest refuse elevation Near MW -5, south-east area of landfill Separation between refuse and groundwater Includes capilary rise of 3.25 feet Regulatory minimum separation = 5 feet Lowest elevation of perimeter LFG migration monitoring wells Drill depth, SG -102 through -125 674 Acres 117 Acres 432 ft MSL 180 ft MSL 40 ft MSL 140 ft 160 ft MSL Note 1: Final refuse footprint excludes the pond area at this time. The County reserves the option to place refuse on a total 750 acres, including the pond area, subject to fulfilling all CEQA and other regulatory requirements. Foothill Sanitary Landfill Joint Technical Document Public Works/Solid Waste County of San Joaquin -July 30, 2010