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Preliminary Closure and Post-Closure Maintenance Plan <br /> Foothill Sanitary Landfill <br />TABLE OF CONTENTS <br /> <br />1.0 Introduction ............................................................................................................... 1 <br />1.1 General .................................................................................................................... 1 <br />1.2 Purpose of This Document ...................................................................................... 1 <br />1.3 Update Items........................................................................................................... 1 <br />2.0 Closure ....................................................................................................................... 2 <br />2.1 Limits of Waste and Final Cover Topography ......................................................... 2 <br />2.2 Closure Phasing ....................................................................................................... 2 <br />2.3 Site Life and Volumetric Calculations ..................................................................... 2 <br />2.4 Closure Activities ..................................................................................................... 3 <br />2.4.1 Structure Removal ...................................................................................... 3 <br />2.4.2 Site Security ................................................................................................ 3 <br />2.4.3 Final Cover and Grading .............................................................................. 4 <br />2.4.4 Slope Stability .............................................................................................. 4 <br />2.5 Environmental Monitoring ..................................................................................... 6 <br />2.5.1 Groundwater ............................................................................................... 6 <br />2.5.2 Landfill Gas (LFG) Migration Monitoring and Control ................................ 6 <br />2.5.3 Landfill Gas Surface (LFG) Emissions ........................................................... 6 <br />2.5.4 LFG Treatment ............................................................................................ 7 <br />2.5.5 Leachate Control ......................................................................................... 7 <br />2.5.6 Surface Water ............................................................................................. 8 <br />2.5.7 Storm Water................................................................................................ 8 <br />2.6 Closure Cost Estimate ................................................................................. 8 <br />3.0 Post-Closure Maintenance .......................................................................................... 8 <br />3.1 Post-Closure Land Use ............................................................................................ 8 <br />3.2 Post-Closure Maintenance ...................................................................................... 8 <br />3.2.1 General Maintenance and Inspection ........................................................ 9 <br />3.2.2 Final Cover .................................................................................................. 9 <br />3.2.3 Groundwater Monitoring ........................................................................... 9 <br />3.2.4 Storm Water and Surface Water Monitoring Points .................................. 9 <br />3.2.5 Landfill Gas Migration Monitoring .............................................................. 9 <br />3.2.6 Landfill Gas Collection and Control System ................................................ 9 <br />3.2.7 Leachate Control System .......................................................................... 10 <br />3.3 Post-Closure Maintenance Cost Estimate ............................................................ 10 <br /> <br />