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B. Butt -Fusion Joining: Butt -fusion of pipes and fittings shall be performed in accordance with the pipe manufacturer's recommendations as to equipment and technique. Depending on site conditions, butt -fusion joining shall be performed in or outside of the excavation at the EARTHWORK CONTRACTOR's option. 3.6 PLACEMENT IN LEACHATE COLLECTION TRENCH A. General: Care shall be exercised when lowering pipe into the trench to prevent damage or twisting of the pipe. B. Pipe Base: Pipe and fittings shall be laid directly on Coarse Gravel in leachate collection trench as shown on Construction Drawings. The trench bottom shall be carefully shaped to conform to the shape of the pipe and fittings for the bottom one-quarter of the pipe. C. Coarse Gravel Backfill: Backfill material shall be as specified in Section 02300, EARTHWORK, and shall be placed in accordance with that Section and as shown on the Construction Drawings. 3.7 CONNECTION AND REMOVAL OF 3 -INCH DIAMETER LEACHATE COLLECTION PIPES A. The EARTHWORK CONTRACTOR shall develop a leachate mangement plan with the OWNER, DESIGN ENGINEER, and QA/QC CONSULTANT to address the control and containment of leachate during connection and removal of LCRS pipes and trenches. B. Connect WMU FU -04 and WMU FU -05 3 -inch perforated HDPE pipes using appropriate coupler. Extend filter geotextile and coarse gravel as necessary to connect LCRS trenches. Overlap filter geotextile a minimum 3 -feet. F. As shown on the Construction Drawings, route the 3 -inch solid HDPE leachate header pipe from the western end of WMU FU -05 (located on the top deck of the former Austin Road Landfill) to the base of WMU FU -04. Route the 3 -inch solid HDPE leachate header pipe from the eastern end of WMU FU -05 (located on the top deck of the former Austin Road Landfill) to a temporary leachate storage tank provided by the OWNER. Once construction of the WMU FU -05 base liner, LCRS components, and protective operations layer in the southern portion of the WMU FU -05 cell is completed.and approved for disposal by the RWQCB, route the 3 -inch solid HDPE leachate header pipe that drains to the temporary leachate tank to the base of the southern portion of the WMU FU -05 cell. The 3 -inch solid HDPE leachate pipe shall be field fit and located such that it shall not damage the WMU FU -05 lining system components. 3.8 PLACEMENT OF LEACHATE RISER PIPES A. Place leachate riser pipes at location shown on the Construction Drawings. B. Connect pipe sections by thermal butt fusion. Forward Landfill WMU FU -06 02535 4 LEACHATE PIPES