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Table 2-3
<br /> Preliminary Closure Cost Estimate
<br /> Foothill Sanitary Landfill
<br /> San Joaquin County, California
<br /> Items Quantity Units Unit Cost Extn
<br /> FINAL COVER SOIL
<br /> 1 Preparation of landfill to receive cover(final grading) 673 ACRE $800 $538,400
<br /> 2 Evapotranspiration Layer(on-site soils) 3,800,207 CY $3.5 $13,300,723
<br /> 3 Vegetation 800 ACRE $2,000 $1,600,000
<br /> Final Cover Soil Subtotal $15,439,123
<br /> MONITORING SYSTEM
<br /> 4 Perimeter Landfill Gas Monitoring System 12 EACH $6,500 $78,000
<br /> 5 Groundwater Monitoring System 2 LS $10,500 $21,000
<br /> 6 Leachate Control System 1 LS $5,000 $5,000
<br /> Monitoring Systems Subtotal $104,000
<br /> LFG CONTROL
<br /> 7 Disabling and Rebuilding Gas System 1 LS $283,089 $283,089
<br /> 8 System expansion at Closure 10 ACRE $15,200 $152,000
<br /> LFG Control System Subtotal $435,089
<br /> OTHER SITE IMPROVEMENTS
<br /> 9 Drainage Structures 1 LS $10,000 $10,000
<br /> 10 Security Measures 2,500 LF $35 $87,500
<br /> 11 Survey Monuments None planned for closure $0
<br /> 12 Dismantle Structures 4,600 1 SF $3.5 $16,100
<br /> 13 Decommission Environmental Monitoring System None planned for closure $0
<br /> Other Site Improvement Subtotal $113,600
<br /> Total Construction Cost $16,091,812
<br /> PROFESSIONAL SERVICES
<br /> 14 Engineering(Design and Bid Documents) 1% of total construction cost $160,918
<br /> 15 Topographic and Boundary Survey 1 LS ( '. $66,875 $66,875
<br /> 16 Construction Quality Assurance 5% of cover layer cost $771,956
<br /> Professional Services Subtotal $999,749
<br /> TOTAL ESTIMATED CLOSURE COST $17,091,561
<br /> CONTINGENCY(20%) '$314`18;312.
<br /> TOTAL L $20,509,874
<br /> SF=square foot
<br /> CY=cubic yard
<br /> LS=lump sum
<br /> All Costs are in 2004 dollars.
<br /> FINAL COVER-Assume ET cover over existing 18 inch thick(minimum)intermediate.
<br /> ET cover thickness over existing cover(FT) 3.5
<br /> Volume of ET cover placed(CY) 3,800,207
<br /> MONITORING SYSTEM
<br /> 4 Assume twelve new LFG perimeter monitoring wells will be installed. Each well will consist of 3 probes.
<br /> 5 Assume two new groundwater monitoring wells will be installed. In addition,this cost should cover repairs to all of
<br /> the wells at closure.
<br /> 6 It is anticipated that the leachate system will be installed as each module is constructed. However,this cost will
<br /> cover any additional repairs or additional sumps,as needed.
<br /> LFG CONTROL-a portion of the above-ground LFG system will be replaced during closure
<br /> SITE IMPROVEMENT
<br /> 9 Drainage structures consist of perimeter ditching and natural finished drainage contours on the landfill surface.
<br /> 10 Fencing will be placed around the entire site as it is developed. Fencing at closure assumes approximately 2,500
<br /> feet of aluminized steel fence,8 feet high.
<br /> 11 Assume survey monuments will be in-place at closure.
<br /> 12 Structures to be removed include the scalehouse,office and maintenance buildings,with surface area of
<br /> approximately 43,210 sf(based on 1990 PCPC Plan)Demolition cost assumes buildings on 4"concrete slab.
<br /> 13 Dismantling of environmental control system will be included in the post-closure costs.
<br /> PROFESSIONAL SERVICES
<br /> 15 Assume conventional topographical survey+aerial surveying. Cost based on maximum topographic survey cost
<br /> Foothill Sanitary Landfill Public Works/Solid Waste
<br /> Preliminary PCPM Plan County of San Joaquin-Revised April 28,2005
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