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entrance will be secured with a gate allowing access to <br /> authorized personnel only. The entire perimeter of the property <br /> will be fenced to protect the monitoring devices. <br /> FINAL COVER <br /> Final cover at the Foothill Sanitary Landfill will be applied to <br /> each individual module upon reaching capacity. The final cover <br /> will consist of a 2 foot foundation layer followed by a 1 foot <br /> clay layer and a 1 foot vegetative layer. Soils from the site <br /> will be utilized for the foundation layer, vegetative layer, and <br /> part of the clay layer. Clay from an off-site source will be <br /> mixed with on-site material to achieve the desired permeability <br /> for the low-permeability layer. Total soil needs for the <br /> landfill are shown in Table 2 . The final cover will be applied <br /> by on site landfill equipment. <br /> The foundation layer will consist of the materials that will be <br /> excavated from each module. The next one foot layer will consist <br /> of on-site material mixed with clay from an off-site borrow <br /> source. The mixture will be compacted to 95% of maximum density <br /> to obtain a permeability of 1. 0 x 10'7 cm/sec or less. If 95% <br /> compaction and the permeability specification cannot be reached <br /> by normal methods, more clay may be added to the soil, so that <br /> the 1. 0 x 10-7 cm/sec permeability can be met. The vegetative <br /> layer soil will also come from the site. It will be taken <br /> directly from top soil of the adjacent modules to be opened. The <br /> vegetative layer will be seeded with grass upon completion of <br /> each module. <br /> As Table 2 indicates, about 4 , 266, 000 cubic yards of soil are <br /> necessary to apply the 4 feet of final cover over the entire <br /> landfilled site. Using a 23 cubic yard scraper, it would take <br /> about 185,478 loads to apply the soil. The scraper will be able <br /> to excavate, transport and apply about 6 loads per hour. At this <br /> rate, it would take one scraper about 30, 913 hours to apply final <br /> cover over the entire landfill. However, final cover will be <br /> applied to each module upon reaching capacity throughout the life <br /> of the site. Final cover will be placed over the last module <br /> within 6 months after reaching capacity if one 23 yard scraper is <br /> used. However, more than one scraper may be used to reduce the <br /> overall time needed to apply the cover. <br /> FINAL GRADING <br /> The final landfill slopes will be constructed to a minimum of <br /> three percent grades to provide adequate drainage and prevent <br /> ponding after settlement of wastes underlying the upper landfill <br /> slopes. Drainage swales will be constructed in some areas of the <br /> 13 <br />