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Holes smaller than 1/8 inch shall be repaired by one extrusion bead weld. The surface of the <br />geomembtane shall be ground to a minimum of one inch around holes immediately before <br />welding and shall be vacuum tested after welding. The Contractor shall mark the result of the <br />test, date of the test, and name of the tester. <br />Holes larger than I!8 inch, blisters, undispersed raw materials, and contamination by foreign <br />matter shall be patched. Tears shall also be patched with the ends of tears rounded prior to <br />patching. Patches shall be round or oval in shape and made of the same material as the <br />geomembrane. They shall extend a minimum of 6 inches beyond the edge of defects and shall <br />' be a minimum of 12 inches in diameter. The Contractor shall bevel the edge of the patch to the <br />geomembrane by an approved method and then vacuum test the patch. The Contractor shall mark <br />the result of the test, date of the test, and name of the tester. Any extrusion weld that fails shall <br />be required to have a patch. At no time during repairs will double extrusion beads be acceptable. <br />' Daily documentation of non-destructive and destructive testing results shall be submitted to the <br />Quality Assurance Engineer. The documentation shall identify seams that initially failed the test <br />and include evidence that test seams were repaired and retested successfully. <br />4.2.12.5 RgQuired Field Seam Streneths <br />The following test requirements shall apply to both pre-weld qualification and destructive seam <br />testing. <br /> <br /> <br /> <br />1 <br /> <br /> <br /> <br />1 <br />