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0 <br />Preliminary Postclosure Maintenance Cost Estimate <br />Ll <br />Items I Quantity I Units I Unit Cost I Annual Cost <br />FINAI COVFR MAINTFNANCF <br />Soil (replace 6 inches over 1% of landfill area) <br />1,500 <br />CY <br />$6 <br />$9,000 <br />Seeding and Mulching (approx. 5% of landfill area) <br />10 <br />ACRE <br />$5,500 <br />$55,000 <br />Mowing <br />185 <br />ACRE <br />$200 <br />$37,000 <br />Cover Repair Subtotal <br />Storm Water Sampling (NPDES) <br />2 <br />EA <br />$101,000 <br />I FArWATF MANAr;FMFNT <br />Leachate Sampling <br />7 <br />EA <br />$320 <br />$2,240 <br />Leachate Analysis <br />7 <br />EA <br />$200 <br />$1,400 <br />Leachate Collection Systems Subtotal <br />Surface Water Sampling <br />6 <br />EA <br />$3,600 <br />I Fr; MIGRATION MONITORING AND CONTROL SYSTEM <br />Perimeter Migration Monitoring 18 wells x 3 probes each for <br />quarterly monitoring <br />1 <br />LS <br />$5,200 <br />$5,200 <br />Gas Analysis (includes VOC analysis) <br />1 <br />LS <br />$30,000 <br />$30,000 <br />LFG Migration Control SystEm Subtotal <br />Surface Water Sampling <br />6 <br />EA <br />$35,200 <br />I FG FMISSION MONITORING AND CONTROL SYSTEM <br />Maintenance/Rept ace ment/Operation* <br />1 <br />LS <br />$318,700 <br />$318,700 <br />LFG Emission Control System Subtotal <br />Vadose Sampling (not including VOC analysis from LFG <br />monitoring wells) <br />20 <br />EA <br />$318,700 <br />GROUNDWATER, VADOSE AND SURFACE WATER MONITORING - <br />Groundwater Sampling <br />40 <br />EA <br />$320 <br />$12,800 <br />Vadose Sampling (not including VOC analysis from LFG <br />monitoring wells) <br />20 <br />EA <br />$600 <br />$12,000 <br />Surface Water Sampling <br />6 <br />EA <br />$320 <br />$1,920 <br />Storm Water Sampling (NPDES) <br />2 <br />EA <br />$320 <br />$640 <br />Analysis <br />61 <br />EA <br />$200 <br />$12,200 <br />Monitoring Well Maintenance <br />1 <br />LS <br />$1,000 <br />$1,000 <br />Groundwater and Surface Water Monitoring Subtotal <br />$40,560 <br />DRAINAGE <br />1 <br />LS <br />$7,500 <br />$7,500 <br />SECURITY <br />1 <br />LS <br />$1,000 <br />$1,000 <br />INSPECTIONS AND RECORD KEEPING <br />1 <br />LS <br />$8,00.0 <br />$8,000 <br />* See Supplemental Postclosure Costs for LFG Emission Control System, Page E4 <br />** See Supplemental Information Regarding Quantities for Estimating Postclosure Maintenance Costs, Page E-5 <br />PCMP for NCRCSL E-1 <br />01San Joaquin CountylNCRCSL11180401PCPMMFinal Rep0rAPCPMP_Rev_Jan_2010.Doc <br />Department of Public WorksrSolid Waste <br />County of San Joaquin — January 7, 2010 <br />