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• <br />41 <br />October 2004 -33- <br />6.1 Destructive Testing <br />043 -2170 <br />Golder selected destructive test locations based on Poly - Flex's completion of approximately <br />142,9151ineal feet of welding, various working conditions, and on seaming observations <br />(e.g., suspicion of a defective weld or welder). _ Poly -Flex obtained and tested 296 fusion seam <br />destructive samples and 31 extrusion seam destructive samples during the installation of the <br />geomembrane in the Phase IVc OSA. <br />Poly -Flex constructed approximately 138,619 lineal feet of fusion welded seams, and 4,296 lineal feet <br />of extrusion welded seams. The specified frequency of destructive testing was one test per 500 lineal <br />feet of weld or one test per day. Golder identified and Poly -Flex obtained destructive samples from <br />the geomembrane panel seams at a frequency of one destructive test sample per 468 lineal feet of <br />fusion welded seams, and one per 139 lineal feet of extrusion welded seams. The test frequency <br />exceeded project requirements (one test per 500 lineal feet of seam). <br />Field destructive testing of seams consisted of testing ten I -inch wide coupons, five of which were <br />tested for peel, and five of which were tested for shear. Poly -Flex tested the inside and outside tracks <br />of the fusion welds for peel. Poly -Flex performed all destructive tests on -site using a field <br />tensiometer, and Golder observed and documented all tests. <br />The specified acceptance criteria for 80 -mil textured LLDPE to 80 -mil textured LLDPE shear tests <br />was that four of the five coupons tested must have an ultimate strength of at least 112 pounds per <br />pulling inch (ppi) prior to yield. The specified acceptance criteria for peel tests was that four of the <br />five coupons tested must have ultimate strength of at least 96 ppi and achieve a Film Tear Bond <br />(FTB) upon breaking. All destructive fusion seam and extrusion seam samples met specifications. <br />The summaries of destructive test results for fusion and extrusion seams are presented in <br />Appendix K -8. The Geomembrane Record Drawing No. 5 (Appendix A) shows the destructive test <br />sample locations. <br />6.1.6 Non- Destructive Testing <br />Poly -Flex performed non - destructive seam testing on completed seams and geomembrane repairs. <br />Non - destructive testing for seams included pressure testing of fusion - welded seams, and vacuum <br />1 41217UW4W1Ctn- <MftNo-1024W3270.D4O& L24W. CerLPhrVIAa <br />Golder Associates <br />