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lateral pipes will then terminate into the vegetative layer and connect to the <br />existing LFG header. Lateral trenches in the vegetative layer will be carefully <br />excavated to minimize disturbance to the barrier layer (Figure 6). <br />The barrier layer will be restored with a minimum of four inches of bentonite as <br />done in the previous work at this site. Restoration of the barrier layer will be <br />witnessed and certified by a licensed Engineer. A certification report will be <br />submitted upon EHD's request. <br />Open excavations and borings deeper than three feet will be covered with a <br />one -inch thick piece of plywood at the end of the working day. The edges of the <br />plywood will be sealed around with soil to prevent landfill gas from escaping into <br />the atmosphere. The plywood -covered area will also be flagged with warning <br />tape. <br />B. Equipment <br />The contractor will provide all necessary equipment for this project. It is <br />anticipated that a truck -mounted drill rig will be used. A backhoe may be used for <br />trenching and loading excavated refuse into a disposal container. Personnel <br />working around heavy equipment will wear safety glasses and hard hats. <br />C. Inspection <br />SWD's contractor will notify EHD Unit 6 at least two (2) working days in advance <br />for inspection of: <br />Well construction. <br />2 Excavation of lateral trench in the closure cap. <br />3 Backfill of lateral trenches in the closure cap. <br />4 Backfill of abondoned borings. <br />D. Construction Schedule <br />Installation of the new LFG extraction wells will be scheduled in November 2008. <br />The work is expected to be completed in eight working days. Work will be done by <br />SWD's contractor Monday to Frida 7:00 am to 5:00 ph <br />Work Plan — LFG Extraction Well Installation <br />Corral Hollow Sanitary Landfill <br />10-2-08 3 <br />San Joaquin County <br />Public Works Department <br />Solid Waste Division <br />