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14. Do not allow any vehicular traffic directly on geomembrane. <br /> 15. Visually inspect geomembrane for imperfections. Mark faulty or suspect <br /> areas for repair. <br /> 16. Install material to account for shrinkage and contraction while avoiding <br /> wrinkles. Install material stress-free with no bridging before it is covered. <br /> Add material as needed to avoid bridging. <br /> 17. Before wrinkles fold over, attempt to push them out. For wrinkles that <br /> cannot be pushed out, cut them out and repair cuts prior to burial or at the <br /> direction of the QA/QC CONSULTANT. <br /> 18. Use slip sheet when deploying textured geomembrane over geotextiles to <br /> avoid damaging geotextile fibers. <br /> 19. Single-sided 60-mil textured HDPE geomembrane shall be installed in <br /> continuous contact with the underlying material and with the textured side <br /> facing down. <br /> B. Seam Layout. <br /> 1. Orient seams parallel to line of a maximum slope,i.e.,orient down not across <br /> slope. <br /> 2. Minimize number of field seams in corners,odd-shaped geometric locations <br /> and outside corners. <br /> 3. Keep horizontal seams (seams running approximately parallel to slope <br /> contours) at least 5 feet away from toe or crest of slope, unless approved by <br /> DESIGN ENGINEER. No horizontal seams shall be allowed on the slope. <br /> 4. Use scam numbering system compatible with panel number system. <br /> 5. Shingle panels on all slopes and grades as directed by QA/QC <br /> CONSULTANT. <br /> 6. Longitudinal seams shall not be allowed in the LCRS trenches. <br /> C. Seam Welding Personnel. <br /> 1. Provide at least one welder(master welder)who has experience welding over <br /> 5 million square feet of geomembrane using the same type of welding <br /> apparatus in use at site. <br /> 2. Qualify personnel performing welding operations by experience and by <br /> successfully passing field welding tests performed on site. <br /> 3. Master welder will provide direct supervision over other welders. <br /> D. Seam Welding Equipment. <br /> 1. Extrusion welder: equipped with gauges showing temperatures in extruder <br /> apparatus and at nozzle. Temperature at nozzle may be measured by external <br /> temperature gauges. <br /> FORWARD LANDFILL 02778 <br /> HIGH DENSITY POLYETHYLENE <br /> 14 (HDPE)GEOMEMBRANE <br />