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Item Description Units Unit Price Quantity Total Cost2 LEACHATE CONTROL SYSTEMLeachate Control SystemComponents: Pump replacement.Replace Pumps ls 65,000$ 1 65,000$ Subtotal, Leachate Control System 65,000$ 3 LANDFILL GAS CONTROL AND MONITORING3ALandfill Gas Control Adjustments/AdditionComponents: Disconnection and rebuilding of entire system.Construction: Partial replacement of laterals and flare improvements. No new extraction wells are anticipated.Wellhead Assembly (installed) ea. 1,310.00$ 100131,000.00$ 4-inch HDPE Condensate Pipe (installed) lf 13.00$ 15,000195,000.00$ 10-inch Collection Header (installed) lf 39.00$ 5,000195,000.00$ Motor Grade w/ Operator hr. 319.18$ 234 74,688.47$ Wheel Loader w/ Operator hr. 251.95$ 234 58,956.89$ Water Truck w/ Operator hr. 209.50$ 234 49,023.82$ Flare Improvements & Gas to Energy Station ea. 122,000.00$ 1122,000$ Field CQA (20% of Construction Costs) % 20% 1 92,937.69$ Subtotal, Landfill Gas Control Adjustments/Replacement 918,607$ 3BLandfill Gas Migration Monitoring SystemIt is anticipated that four new monitoring probes will be installed during closure.ea. 49,500$ 4198,000$ Subtotal, Landfill Gas Migration Monitoring System 198,000$ 4 GROUNDWATER MONITORINGIt is anticipated that two new groundwater monitoring will be installed during closure.Install new wells ea. 48,200$ 2 96,400$ Subtotal, Groundwater Monitoring 96,400$ LEACHATE/CONTROL MONITORING, LANDFILL GAS CONTROL/MONITORING AND GROUNDWATER MONITORINGFOOTHILL SANITARY LANDFILLFoothill Sanitary Landfill Prelim Closure-Postclosure Cost Estimate August_2025_Final.xlsxPage 4 of 15