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I <br />FINAL CLOSURE PLAN...................................................................................................1 <br />1.0 <br />INTRODUCTION............................................................................................................... <br />1 <br />2.0 <br />BACKGROUND................................................................................................................1 <br />2.1 GENERAL.............................................................................................................1 <br />2.2 REASON FOR THE CLOSURE CAP EXTENSION ............................................... 2 <br />2.3 SHELL OIL EASEMENT........................................................................................2 <br />3.0 <br />CURRENT MONITORING AND CONTROL SYSTEMS .................................................... 3 <br />3.1 GROUND WATER................................................................................................. <br />3 <br />3.1.A Shallow Aquifer Monitoring (Four Wells) .................................................... <br />3 <br />3.1.B Deep Aquifer Monitoring (Two Wells).........................................................3 <br />3.2 SECURITY............................................................................................................ <br />3 <br />3.3 DUST..................................................................................................................... <br />3 <br />3.4 LITTER..................................................................................................................3 <br />3.5 FIRES....................................................................................................................4 <br />3.6 LANDFILL GAS.....................................................................................................4 <br />3.6.A Landfill Gas migration monitoring............................................................... 4 <br />3.6.B Landfill Gas collection................................................................................4 <br />4.0 <br />CLOSURE CAP EXTENSION IMPLEMENTATION SCHEDULE.......................................4 <br />5.0 <br />STRUCTURE REMOVAL..................................................................................................5 <br />6.0 <br />DECOMMISSIONING OF ENVIRONMENTAL CONTROLS..............................................5 <br />7.0 <br />SITE SECURITY...............................................................................................................5 <br />8.0 <br />FINAL COVER.................................................................................................................. 5 <br />8.1 AREA OF CLOSURE CAP EXTENSION............................................................... 5 <br />8.2 FOUNDATION LAYER.......................................................................................... 6 <br />8.3 LOW -HYDRAULIC CONDUCTIVITY LAYER.........................................................6 <br />8.4 EROSION -RESISTANCE (VEGETATIVE) LAYER................................................7 <br />9.0 <br />FINAL GADING.................................................................................................................7 <br />10.0 <br />FINAL SITE FACE............................................................................................................7 <br />11.0 <br />INSTALLATION OF DRAINAGE CONTROL.....................................................................7 <br />12.0 <br />SLOPE PROTECTION AND EROSION CONTROL..........................................................8 <br />13.0 <br />IMPLEMENTATION OF LEACHATE CONTROL MEASURES..........................................8 <br />14.0 <br />INSTALLATION OF GROUNDWATER MONITORING NETWORK .................................. 8 <br />15.0 <br />INSTALLATION OF GAS MONITORING NETWORK....................................................... 8 <br />16.0 <br />(NEW) INSTALLATION OF LANDFILL GAS COLLECTION..............................................8 <br />II <br />FINAL CLOSURE COST ESTIMATES..............................................................................9 <br />1.0 <br />FINAL COVER.................................................................................................................. 9 <br />1.1 FOUNDATION SOIL LAYER PREPARATION.......................................................9 <br />1.2 GCL BARRIER...................................................................................................... 9 <br />1.3 VEGETATIVE LAYER........................................................................................... <br />9 <br />2.0 <br />CONSTRUCTION QUALITY ASSURANCE...................................................................... 9 <br />3.0 <br />REVEGETATION............................................................................................................10 <br />4.0 <br />LANDFILL GAS MONITORING AND CONTROL............................................................ <br />10 <br />5.0 <br />LEACHATE CONTROL MEASURES.............................................................................. <br />10 <br />6.0 <br />GROUNDWATER MONITORING SYSTEM....................................................................10 <br />7.0 <br />DRAINAGE SYSTEM......................................................................................................10 <br />8.0 <br />ADDING AND REMOVING SECURITY SYSTEMS.........................................................10 <br />9.0 <br />STRUCTURE REMOVAL................................................................................................ <br />10 <br />10.0 <br />DISMANTLING ENVIRONMENTAL CONTROLS............................................................ <br />10 <br />11.0 <br />CLOSURE COST SUMMARY......................................................................................... <br />10 <br />Closure Plan Addendum <br />San Joaquin County <br />April 4, <br />2008 <br />Department of Public Works <br />Corral Hollow Sanitary Landfill' <br />Solid Waste Division <br />