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abutting geomembrane or other low-permeability layer, covered by soil <br /> equivalent to that existing prior to repair. <br /> 5.1.13 Final Cover over Shell Oil Pipeline <br /> If the geomembrane over the pipeline is removed to repair or maintain the Shell <br /> Oil pipeline, then a re-installation plan will be submitted before any repair is <br /> made. <br /> 5.2 DRAINAGE <br /> The drainage patterns will not be significantly changed by the closure cap <br /> extension; therefore, the monitoring and maintenance requirements for drainage <br /> will not significantly change from those identified in the original Postclosure <br /> Maintenance Plan of 1992. <br /> 5.3 VEGETATION <br /> Areas where vegetation has not established in the closure cap extension area by <br /> hydroseeding after construction), will be re-seeded and fertilized as needed to <br /> establish the vegetation. Vegetation control at the site will be by grazing or <br /> mowing. Maintaining vegetation control will also help minimize fires in the closure <br /> cap extension area. <br /> 5.4 LEACHATE <br /> ' Leachate will not be produced; therefore, the monitoring and maintenance <br /> requirements for leachate will not change from those identified in the original <br /> ' Postclosure Maintenance Plan of 1992. <br /> 5.5 LANDFILL GAS <br /> 5.5.A Landfill Gas Migration Monitoring <br /> The monitoring and maintenance requirements for landfill gas migration <br /> monitoring will not significantly change from those identified in the original <br /> ' Postclosure Maintenance Plan of 1992. <br /> ' Postclosure Maintenance Plan Addendum San Joaquin County <br /> Corral Hollow Sanitary Landfill Department of Public Works <br /> October 26,2012 5 Solid Waste Division <br />