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Forward Compost Facility Stormwater Improvements <br />02778 14 HDPE GEOMEMBRANE <br />5. Do not remove more than 4 mils of material when grinding. 6. Grind across, not parallel to, welds. 7. Cover entire width of grind area with extrudate. 8. When restarting welding, grind ends of all welds that are more than 5-minutes old. <br />H. Hot Wedge Welding. 1. Place smooth insulating plate or fabric beneath hot welding apparatus after usage. 2. Protect against moisture build-up between panels. 3. If welding cross seams, conduct field test welds at least every 2 hours, otherwise, once prior to start of work and once at mid-day. 4. Bevel edges of top and bottom panels on cross seams. 5. Do not weld on geomembrane until equipment has passed trial weld test. 6. Extrusion-weld a repair patch over all seam intersections. 3.4 FIELD QUALITY CONTROL AND QUALITY ASSURANCE <br />A. General: Manufacturer, Fabricator, and GEOSYNTHETICS CONTRACTOR shall participate in and conform with all terms and requirements of the OWNER's construction quality assurance program. The GEOSYNTHETICS CONTRACTOR is responsible for assuring this participation. Construction quality control and quality assurance requirements are as specified in this paragraph and the CQA Manual. <br />B. Acceptance Testing 1. Allow 4 days for acceptance testing following the date material is available to the QA/QC CONSULTANT. 2. Perform acceptance testing on geomembrane rolls. 3. The QA/QC CONSULTANT will obtain and test samples. 4. Test samples for conformance with design specifications and guaranteed properties. 5. Perform, as a minimum, following tests to determine geomembrane characteristics. a. Density: ASTM D792, Method A or ASTM D1505. b. Thickness: Measured with appropriate micrometer where applicable. Take 20 measurements across the roll width. c. Tensile Strength: ASTM D638. d. Carbon Black Content: ASTM D1603. e. Carbon Black Dispersion: ASTM D3015 f. Asperity: GM-12. 6. Interface Direct Shear Strength: ASTM D5321. The QA/QC CONSULTANT will collect samples of gemembrane for interface direct shear strength testing. The QA/QC CONSULTANT shall perform one interface shear test between the clay liner and textured geomembrane and one interface shear test between the textured geomembrane and the cushion geotextile, as discussed in Section 2.3. 7. Sampling Procedures. a. Sample across the entire width of the roll. b. Cut sample 3-feet-long by width of roll.