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3.06 PIPING <br /> Trench excavation and backfill shall be in the presence of the Engineer. <br /> A. LFG Well Lateral <br /> 1. Trenches <br /> Barrier layer shall not be disturbed. If disturbed, the Contractor shall <br /> remove the disturbed material and replace it with bentonite. <br /> 2. Trench Backfill <br /> a. Sand bedding shall be compacted using a vibratory plate compactor. <br /> b. Soil backfill in the lateral trench on the top deck of the landfill shall be <br /> moistened and compacted with a jumping-jack compactor. Soil <br /> backfill in lateral trenches on the side slopes shall be compacted with <br /> a vibratory plate. <br /> B. Lateral-to-Header Connection <br /> 1. Connect all new dual LFG well laterals to the existing 6" HDPE SDR <br /> 17 header on the side of the landfill. <br /> 2. Do not disturb barrier layer while connecting the lateral to the header. <br /> 3. Flare shutdown time for connecting laterals to the LFG header will be <br /> limited to 10 hours only (One working day). The Contractor shall notify <br /> the Engineer minimum of two working days in advance to shutdown <br /> the flare. <br /> 4. Foreign materials shall be prevented from entering the header during <br /> header connection. <br /> 5. The contractor shall be responsible for all damages to the existing <br /> header, high pressure air and the condensate line. <br /> PART 4 MEASUREMENT AND PAYMENT <br /> 4.01 GENERAL <br /> Payment for quantities in excess of those identified in the Cost Sheet will <br /> not be paid unless authorized in advance by the Engineer. <br /> Construction Specifications San Joaquin County <br /> LFG Extraction Wells Public Works Department <br /> Harney Lane Sanitary Landfill 10 Solid Waste Division <br /> 10-30-09 <br />