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u C Preliminary Closure Cost Estimate Items I Quantity I Units I Unit Cost I Extn CIMAI r`()\/GP INCTAI I ATION Existing : Vegetative Partial Soil Cover Proposed : Prescriptive Cover (for costing) 7 EA $2,500 $17,500 1.0 Preparation for cover placement 185 ACRE $3,500 $647,500 2.0 Place GCL Barrier 8,461,500 SF $0.60 $5,076,900 3.0 Place Geocomposite Drainage Layer (over 20% of the geomembrane) 1,692,300 1 SF $0.60 $1,015,400 4.0 Place 1 foot Vegetative Soil Cover 470,000 CY $4 $1,252,000 5.0 Hydroseeding 185 ACRE $3,500 $647,500 Final Cover Soil Subtotal $8,639,300 I CAPUATC PAKITDOI IMPPOVFMFNTC Existing : All facilities for 7 sumps in place at time of closure 7.0 Proposed : Inspect and repair all leachate removal systems 7 EA $2,500 $17,500 Leachate Control Improvements Subtotal 2 LS $10,500 $17,500 I Ir. MIMPATION MONITORINr; ANn CONTROL SYSTEM Existing: All facilities are in place at time of closure 8.0 Proposed: Replacements during closure 3 Each $10,500 $31,500 LFG EMISSION MONITORING AND CONTROL SYSTEM 2 LS $10,500 $21,000 Existing : Majority of system in place $21,000 9.1 Proposed: Disabling and Rebuilding Gas System* 1 LS $60,300 $60,300 9.2 Proposed: Well Replacement Costs* 1 LS $121,700 $121,700 LFG Emission Control System Subtotal i 1 1 $213,500 !_D011KIMMATGD MONITORINr: RYSTFM Groundwater Monitoring installations Existing: All facilities are in place at time of closure 10.0 Proposed: Wells replaced during closure 2 LS $10,500 $21,000 Groundwater Monitoring System Subtotal $21,000 * See supplemental LFG system cost estimates, Page D-5 PCMP for NCRCSL D-1 0ASan Joaquin CountytNCRCS01180401PCPMPIFinal ReporAPCPMP_Rev-Jan_2010.Doc Department of Public Works/Solid Waste County of San Joaquin - January 7, 2010