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11 <br />Table 2 (continued) <br />Annual Postclosure Maintenance Cost Estimate <br />Foothill Sanitary Landfill <br />San Joaquin County, California <br />(Analytical costs are based on current quarterly sampling constituents. 5 year CDCs are not included in the costs <br />COVER MAINTENANCE <br />1. Soil cover maintenance includes on-site soil excavation, haul and placement. <br />Excavate and haul $2.00/CY UCB soil excavation <br />Soil placement 2.00/CY UCB earthfill <br />$4.00/CY Assume limited quantities at double cost; therefore, $8.00/CY <br />2. Seeding and mulching at UCB unit cost of $3,000/AC; Area at 3% of 673 AC = 34 AC <br />3. Mowing $200/AC <br />LEACHATE COLLECTION <br />4. Operation, Maintenance, and Disposal. Inspect and repair pumps for leachate pumped back to the landfill. Assume 2 <br />technician hours per sump per quarter for OM&D. (2 hrs)($96/hr tech with truck) _ $192/sump/quarter or $768/yr. Call <br />. Sampling. Assume 4 techician hours per sump to sample, with sampling on an annual basis. (4 hr)($96/hr tech with <br />uck) _ $384/yr. Call $400/yr. <br />. Leachate Analysis. $220 per sample, 1 sample per year per sump. <br />FG MONITORING <br />. Assume one technician with truck samples in two 8 -hour days per quarter (2 days)(8 hr/day)($96/hr)(4 qtrs) _ <br />6,144/yr. Call $6,100/yr. <br />. Sampling 20 wells for TO -14 analysis semi-annually, lab price, $250 per sample, or (20 wells)(1 <br />robe/well)($250/sample)(2 times/year) _ $10,000/yr. <br />. Surface emission testing at $50/acre per quarter at 100 -foot centers. Annual cost = ($50/hr)(4 gtrs)(673 acres) _ <br />134,600/yr. Call $135,000/yr. <br />LFG CONTROL SYSTEM - Based on existing contracts, prorated per acreage of final landfill. <br />10. See LFG Postclosure Cost Estimate <br />GROUNDWATER AND SURFACE WATER MONITORING - Assume one technician samples 2 days per event. Assume <br />quarterly sampling for groundwater and bi-annual for surface water. <br />11. There are 16 annual sample collections (see page 4) at 4 hrs per sample, $96/hr = $6,144/yr; call $6,100/yr. <br />12. Analysis at $220 each, Cost = $3,520/yr; call $3,500/yr. <br />13. Limited well maintenance is estimated at $1,000/yr. <br />VADOSE ZONE SAMPLING - Assume 20 vadose zone samples will be collected. Assume it takes one technician 20 <br />hours to sample each event. <br />14. Twenty vadose zone sampling events (see page 4) @ 2 hrs per pan lysimeter, $96/hr for tech with truck = $3,840; call <br />$3,800. <br />15. Analysis at $220 ea = $4,400 <br />DRAINAGE <br />16. Inspect semi-annually, repair as needed, one technician at 8 hrs per inspection. Maintenance and repairs at 5% of <br />closure cost for drainage (8 hr x 2 events x $96/hr)(0.05 x $196,000) _ $11,336; Call $12,000/yr) <br />SECURITY <br />17. Limited repair at $5,000/year <br />SETTLEMENT ANALYSIS <br />18. Aerial topographic map and analysis every 5 years at $40,000. Cost per year $8,000. <br />DECOMMISSIONING <br />19. All environmental monitoring facilities to remain in place. <br />OTHER <br />20. Any other inspections and record keeping estimated at 100 hours per year, at $96/hour. <br />Foothill Sanitary Landfill <br />Preliminary PCPM Plan <br />Page 2 of 4 <br />Public Works/Solid Waste <br />County of San Joaquin - Revised July 28, 2010 <br />