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Table 7
<br /> Postclosure Annual Maintenance Cost Estimate
<br /> North County Recycling Center and Sanitary Landfill
<br /> San Joaquin County,California
<br /> Items Quantity Units Unit Cost Subtotals
<br /> COVER REPAIR
<br /> Soil(I%of landfill area) 9,000 CY $2 $24,000
<br /> Sedding and Mulching(5%) 10 ACRE $2,000 $20,000
<br /> Cover Repair Subtotal
<br /> $44,000
<br /> LEACHATE,COLLECTION
<br /> Operation,Maintenance,Disposal 1 LS $0 $0
<br /> Leachate Sampling 1 LS $2,500 $2,500
<br /> Leachate Analysis 1 LS $10,000 $10,000
<br /> 12,500
<br /> Collection Systems Subtotal
<br /> Leachate Collec $
<br /> LANDFILL GAS MONITORING
<br /> Gas Sampling 1 LS $5,200 $5,200
<br /> Gas Analysis 1 LS $27,000 $27,000
<br /> $32,200
<br /> Landfill Gas Monitoring Subtotal
<br /> LANDFILL GAS EXTRACTION SYSTEM
<br /> Maintenance 1 LS $165,000 $165,000
<br /> Operation,Maintenance,Disposal 1 LS $200,000 $200,000
<br /> Landfill Gas Extraction System Subtotal
<br /> $36 5,000
<br /> GROUNDWATER AND SURFACE WATER MONITORING
<br /> Groundwater and Surface Water Sampling I LS $8,000 $8,000
<br /> Analysis 1 LS $6,600 $6,600
<br /> Monitoring Well Maintenance 1 LS $1,000 $1,000
<br /> Groundwater and Surface Water Monitoring Subtotal ai
<br /> .................
<br /> 15,600
<br /> VADOSE ZONE MONITORING
<br /> Vadose zone sampling 1 LS $2,500 $2,500
<br /> Analysis 1 LS $240 $240
<br /> Vadose Zone Monitoring Subtotal $2,740
<br /> OTHER
<br /> Inspections and Record Keeping 1 LS $8,000 $8,000
<br /> Reporting 1 LS $30,000 $30,000
<br /> $38,000
<br /> Other Subtotal
<br /> ESTIMATED POSTCLOSURE COST $510,040
<br /> CONTINGENCY(20%) $105,000
<br /> TOTAL ESTIMATED ANNUAL COST $612,000
<br /> TOTAL COST OVER 30 YEARS $18,360,000
<br /> cy=cubic yard
<br /> LS=lump sum
<br /> All costs are in 2004 dollars.
<br /> Analytical costs are based on current(2004)quarterly sampling constituents. 5 year COCs are not included
<br /> in the costs
<br /> LEACHATE COLLECTION-It is anticipated that each module will have a sump. Although,it is
<br /> unlikely that leachate will be present and sampled each quarter,it was assumed that there will be leachate in
<br /> each sump each quarter.
<br /> LANDFILL GAS MONITORING-Assume one technician samples in 2-8 hour days per quarter.
<br /> Sampling 16 wells for TO-14 analysis quarterly.
<br /> LANDFILL GAS EXTRACTION-Assume maintenance equals 5%of total gas system cost. Assume
<br /> operations equal 1 person full time, 1 person part time,oversight,and electricity.
<br /> GROUNDWATER AND SURFACE WATER MONITORING-Assume one technician samples 2 days
<br /> per event. Assume quarterly sampling for groundwater and bi-annual for surface water.
<br /> VADOSE ZONE SAMPLING-Assume 20 vadose zone samples will be collected. Assume it takes one
<br /> technician 8 hours to sample each quarter.
<br /> INSPECTION AND RECORD KEEPING-Assume 1 day labor per month.
<br /> North County RC and SL Public Works/Solid Waste
<br /> JTD County of San Joaquin-November 30,2004
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