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3.0 Post Closure Maintenance 3.1 Post Closure Land Use After closure of the landfill, the entire facility will become undeveloped, unirrigated open space. No post closure use of the landfill surface is currently envisioned that would involve large-scale use of the landfill surface. It is anticipated that electrical energy will continue to be produced after closure. It is also anticipated that the surface of the landfill will be grazed by sheep or other animal to control vegetation. The LFG flare or electrical generation equipment is tentatively located at the north-west corner of the landfill (JTD Figure 6); however, the County may elect to install such equipment on the landfill closure surface to avoid constraints in surface area available to the LFG-to-energy system. The County will submit design of this facility, including foundation and subsurface barriers in compliance with the regulations in force at that time, to the appropriate regulatory agencies for approval prior to construction. 3.2 Post Closure Maintenance Post closure maintenance must be provided for at least 30 years after closure. Responsibility for post closure maintenance will fall on several groups of individuals who will have different duties and responsibilities during post closure. 3.2.1 General Maintenance and Inspection San Joaquin County staff will visit the facility periodically in accordance with the Waste Discharge Requirements. During those visits the landfill will be inspected for damage or other conditions that require repair or maintenance. Site security features will be assessed as well. 3.2.2 Final Cover San Joaquin County staff will periodically inspect the final cover in accordance with pen -nit and regulatory requirements. In particular, an inspection will occur in September before the start of the rainy season and after every major rainstorm during the rainy season. The inspection in September documents the condition of the final cover and drainage features before the rains and if problems are found, allows sufficient time for the County to make repairs. Inspections after each major rainstorm allow the County to find and correct damage that may have been caused by the rain event. Foothill Sanitary Landfill B-1 0 Public Works/Solid Waste Preliminary CPCM Plan County of San Joaquin — Rev July 2010