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all 11•` • <br />A LFG system was installed in 2001 as a corrective action against LFG <br />migration and VOC impacts to groundwater. The LFG gas system <br />comprises of: <br />LFG extraction wells. <br />There are 39 LFG extraction wells installed in the landfill (Figure 2). Each <br />LFG well has a control valve and monitoring port to measure the methane <br />content and applied vacuum. Each well is adjusted based on the methane <br />content at that well, considering the need to control offsite migration and <br />minimize air introduction in the landfill. The LFG system is monitored and <br />maintained monthly. <br />The County plans to install four new LFG extraction wells in the extended <br />closure cap area. The new LFG extraction wells will connect to the existing <br />LFG system and will be adjusted concurrently with the other wells. <br />Flare station. <br />The flare station includes a flare and 2 blowers that produce vacuum in the <br />LFG extraction wells. A condensate destruction system is also installed at <br />the flare station. The flare is operated in accordance with Air Quality <br />Management District (AQMD) permit # N-4363-2-0. <br />3.1 LEACHATE <br />There is no change in reporting requirements for leachate due to the extension of <br />the closure cap. <br />There is no change in reporting requirements for groundwater due to the extension <br />of the closure cap. <br />Postclosure Maintenance Plan Addendum San Joaquin County <br />Corral Hollow Sanitary Landfill 3 Department of Public Works <br />April 2, 2008 Solid Waste Division <br />