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5. Do not remove more than 4 mils of material when grinding. <br /> 6. Grind across, not parallel to, welds. <br /> 7. Cover entire width of grind area with extrudate. <br /> 8. When restarting welding, grind ends of all welds that are more than <br /> 5-minutes old. <br /> H. Hot Wedge Welding. <br /> 1. Place smooth insulating plate or fabric beneath hot welding apparatus after <br /> usage. <br /> 2. Protect against moisture build-up between panels. <br /> 3. If welding cross seams, conduct field test welds at least every 2 hours, <br /> otherwise,once prior to start of work and once at mid-day. <br /> 4. Bevel edges of top and bottom panels on cross seams. <br /> 5. Do not weld on geomembrane until equipment has passed trial weld test. <br /> 6. Extrusion-weld a repair patch over all seam intersections. <br /> 3.4 FIELD QUALITY CONTROL AND QUALITY ASSURANCE <br /> A. General: Manufacturer,Fabricator,and GEOSYNTHETICS CONTRACTOR shall <br /> participate in and conform with all terms and requirements of the OWNER's <br /> construction quality assurance program. The GEOSYNTHETICS CONTRACTOR <br /> is responsible for assuring this participation. Construction quality control and quality <br /> assurance requirements are as specified in this paragraph and the CQA Manual. <br /> B. Acceptance Testing <br /> 1. Allow 4 days for acceptance testing following the date material is available to <br /> the QA/QC CONSULTANT. <br /> 2. Perform acceptance testing on geomembrane rolls. <br /> 3. The QA/QC CONSULTANT will obtain and test samples. <br /> 4. Test samples for conformance with design specifications and guaranteed <br /> properties. <br /> 5. Perform, as a minimum, following tests to determine geomembrane <br /> characteristics. <br /> a. Density: ASTM D792, Method A or ASTM D1505. <br /> b., Thickness: Measured with appropriate micrometer where applicable. <br /> Take 20 measurements across the roll width. <br /> C. Tensile Strength: ASTM D638. <br /> d. Carbon Black Content: ASTM D 1603. <br /> e. Carbon Black Dispersion: ASTM D3015 <br /> £ Asperity: GM-12. <br /> 6. Interface Direct Shear Strength:ASTM D5321.The QA/QC CONSULTANT <br /> will collect samples of gemembrane for interface direct shear strength testing. <br /> The QA/QC CONSULTANT shall perform one interface shear test between <br /> the clay liner and textured geomembrane and one interface shear test between <br /> the textured geomembrane and the cushion geotextile,as discussed in Section <br /> 2.3. <br /> 7. Sampling Procedures. <br /> a. Sample across the entire width of the roll. <br /> b. Cut sample 3-feet-long by width of roll. <br /> Forward Landfill WMU FU-13 HIGH DENSITY POLYETHYLENE <br /> 02778 16 (HDPE)GEOMEMBRANE <br />