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Table 1 (continued) <br /> Preliminary Closure Cost Estimate <br /> Foothill Sanitary Landfill <br /> San Joaquin County, California <br /> FINAL COVER-Assume ET cover over existing vegetated 18 inch thick(minimum)intermediate cover;See Note 1 below. <br /> ET cover thickness over existing cover(FT) 4.5 <br /> Volume of ET cover placed(CY),over 673 AC 4,827,900 <br /> 1. From North County Area 5 construction bid item(surface preparation)(2015) <br /> 2. From Foothill Area 2A construction bid item(earthfill)(2015). <br /> 3. From Foothill Landfill Area 2A construction bid item(hydroseeding)(2015) <br /> MONITORING SYSTEM <br /> 4. Assume four three-probe soil gas monitoring wells replaced at closure. Prices from contract current in 2015(Andregg) <br /> 5. Assume two additional groundwater monitoring wells will be replaced at closure. Cost from Gregg Drilling,current in <br /> 2015. <br /> 6.Cost current in 2015 for one Module's lysimeters is shown. However,the leachate system and underlying pan lysimeter <br /> will be installed as each module is constructed and will not be part of closure. Assume repair to previously-installed pan <br /> lysimeter equipment to be equivalent to one complete pan lysimeter system. <br /> LFG CONTROL-a portion of the above-ground LFG system will be replaced during closure <br /> 7. Disabling and rebuilding of LFG field components, based on 2015 construction costs <br /> 8. Horizontal LFG collectors will be installed during refuse fill,and will not be part of the closure project. <br /> SITE IMPROVEMENTS <br /> 9. Based on 2015 Foothill Area 2A construction bid items. Drainage structures will include perimeter ditching and graded <br /> drainage swales on the landfill sideslopes and perimeter of slope 32,000 LF total. Ditches and detention basins within the <br /> 200-foot-wide setback area will be constructed as an element of each adjacent module, not in closure. <br /> 10. Jan 2017 prices(C&R Fence).Approximately 2,500 feet of aluminized steel chain link fence,6 feet tall with barbed <br /> wire at top. Note:most fencing will be placed around the entire site as it is developed. <br /> 11. From contract current in 2015(Andregg) <br /> 12. 2015 prices, including foundation and structures. Approximately 5,500 square feet of 4"concrete slab plus above- <br /> ground structures. Remove scalehouse,office and maintenance buildings. <br /> 13. No dismantling of environmental control systems planned for closure. <br /> PROFESSIONAL SERVICES <br /> 14. Engineering design based on the total updated construction cost. <br /> 15. From Andregg Aerial Topographic Services, Inc.,current in 2015 <br /> 16. CQA based on updated final cover construction cost. <br /> NA1 FoothilACalRecyclet2015 JTD Reviewt2015 JTD Docst2015 FH Clo-PostClo Tables2.xls,Table 1 <br /> Foothill Sanitary Landfill Public Works/Solid Waste County of San Joaquin <br /> Preliminary PCPM Plan Page 2 Revised January 27,2017 <br />