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E E Preliminary Postclosure Maintenance Cost Estimate Items I Quantity I Units I Unit Cost I Annual Cost FINAL COVER MAINTENANCE Soil (replace 6 inches over 1 % of landfill area) 1,500 CY $6 $9,000 Seeding and Mulching (approx. 5% of landfill area) 10 ACRE $5,500 $55,000 Mowing 185 ACRE 1 $200 1 $37,000 Cover Repair Subtotal 2 EA I 1 $1;01,000 LEACHATE MANAGEMENT Leachate Sampling 7 EA $320 $2,240 Leachate Analysi's 7 EA $200 $1,400 Leachate Collection Systems Sub -total 6 EA $320 $3,600 LFG MIGRATION MONITORING AND CONTROL SYSTEM Perimeter Migration Monitoring 18 wells x 3 probes each for quarterly monitoring 1 LS $5,200 $5,200 Gas Analysis (includes VOC analysis) 1 LS $30,000 $30,000 LFG Migration Control System Subtotal 6 EA $320 $35,200 LFG EMISSION MONITORING AND CONTROL SYSTEM Maintenance/ReplacemenUOperation* I LS $318,700 $318,700 LFG Emission Control:Systo.m Subtotal 20 EA $600 $318,700 GROUNDWATER, VADOSE AND SURFACE WATER MONITORING" Groundwater Sampling 40 EA $320 $12,800 Vadose Sampling (not including VOC analysis from LFG monitoring wells) 20 EA $600 $12,000 Surface Water Sampling 6 EA $320 $1,920 Storm Water Sampling (NPDES) 2 EA $320 $640 Analysis 61 EA $200 $12,200 Monitoring Well Maintenance 1 ILS $1,000 $1,000 Groundwater and Surface Water Monitoring Subtotal $40,560 DRAINAGE 1 LS $7,500 $7,500 SECURITY 1 LS $1,000 $1,000 INSPECTIONS AND RECORD KEEPING I LS $8,000 $8,000 See Supplemental Postclosure Costs for LFG Emission Control System, Page EA ** See Supplemental Information Regarding Quantities for Estimating Postclosure Maintenance Costs, Page E-5 PCMP for NCRCSL E-1 Department of Public WorkslSolld Waste 0ASan Joaquin CountyiNCRCSL17780401PCPMPIFInalRepoTtIPCPMP-D P6 Doc County of San Joaquln -Rev. 02, Ju�v 70, 2009