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Table of <br />L_ <br />Certification................................................................................................................................................. <br />B -i <br />1.0 Introduction....................................................................................................................................B-1 <br />1.1 <br />General................................................................................................................................B-1 <br />1.2 <br />Purpose of This Document ................. ................................................................................. <br />B-1 <br />1.3 <br />Update Items.......................................................................................................................B-1 <br />2.0 Closure........................................................................................................................................... <br />B-3 <br />2.1 <br />Limits of Waste and Final Cover Topography......................................................................B-3 <br />2.2 <br />Closure Phasing...................................................................................................................B-3 <br />2.3 <br />Site Life and Volumetric Calculations.................................................................................. <br />B-3 <br />2.4 <br />Closure Activities.................................................................................................................B-4 <br />2.4.1 Structure Removal..................................................................................................B-4 <br />2.4.2 Site Security............................................................................................................B-4 <br />2.4.3 Final Cover and Grading.........................................................................................B-5 <br />2.5 <br />Environmental Monitoring.................................................................................................... <br />B-7 <br />2.5.1 Groundwater...........................................................................................................B-7 <br />2.5.2 Landfill Gas (LFG) Migration Monitoring and Control..............................................B-7 <br />2.5.3 Landfill Gas Surface (LFG) Emissions....................................................................B-7 <br />2.5.4 LFG Treatment.......................................................................................................B-8 <br />2.5.5 Leachate Control ............................................... ..................................................... <br />B-8 <br />2.5.6 Surface Water.........................................................................................................B-9 <br />® <br />2.5.7 Storm Water ..................................... ................ ............ ........................................... <br />B-9 <br />2.6 <br />Closure Cost Estimate ................................................ ......................................................... <br />B-9 <br />3.0 Post Closure Maintenance........................................................................................................... <br />B-10 <br />3.1 <br />Post Closure Land Use .......................................................... ............................................ <br />B-10 <br />3.2 <br />Post Closure Maintenance ......... ........................................................................................ <br />B-10 <br />3.2.1 General Maintenance and Inspection...................................................................B-10 <br />3.2.2 Final Cover...........................................................................................................B-10 <br />3.2.3 Groundwater Monitoring ..................... .................................................................. <br />B-11 <br />3.2.4 Storm Water and Surface Water Monitoring Points .............................................. <br />B-11 <br />3.2.5 Landfill Gas Migration Monitoring.........................................................................B-11 <br />3.2.6 Landfill Gas Collection and Control System.......................................................... <br />B-11 <br />3.2.7 Leachate Control System......................................................................................B-11 <br />3.3 <br />Post Closure Maintenance Cost Estimate.......................................................................... <br />B-12 <br />List of Figures <br />Figure B-1 Final Contours, Drainage and Environmental Systems <br />Figure B-2 Final Landfill Gas System <br />Foothill Sanitary Landfill B -ii Public Works/Solid Waste <br />Preliminary CPCM Plan County of San Joaquin — Rev July 2010 <br />