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October 2001 -29- 003-2182.004 <br /> destructive testing of repairs, including the approximate location of each repair is presented in <br /> Appendix J-7a and J-7b. <br /> 6.1.5 Destructive Testing <br /> Golder selected destructive test locations based on Poly-Flex's completion of approximately <br /> 500 lineal feet of welding, various working conditions, and on seaming observations (e.g., <br /> suspicion of a defective weld). Poly-Flex obtained and tested 25 original fusion seam <br /> destructive samples and one extrusion seam destructive samples for the lower geomembrane <br /> layer during the installation of the geomembrane in the External Pond. All original <br /> destructive samples for the lower geomembrane layer passed testing in accordance with the <br /> specifications. For the upper layer of geomembrane, Poly-Flex obtained and tested twenty- <br /> seven original fusion seam destructive samples and one extrusion seam destructive sample. <br /> One original fusion seam sample (DFU-3) failed testing. The failing sample was bounded in <br /> accordance with the specifications and the bounded portion of the failing seam was capped. <br /> Poly-Flex constructed approximately 9,041 lineal feet of fusion welded seams, and 19 lineal <br /> feet of extrusion welded seams for the lower geomembrane layer. The specified frequency of <br /> destructive testing was one test per 500 lineal feet of weld. Golder identified and Poly-Flex <br /> obtained destructive samples from the geomembrane panel seams at a frequency of one <br /> destructive test sample per 362 lineal feet of fusion welded seams, and one per 19 lineal feet of <br /> extrusion welded seams. <br /> Poly-Flex constructed approximately 9,379 lineal feet of fusion welded seams, and 93 lineal <br /> feet of extrusion welded seams for the upper geomembrane layer. The specified frequency of <br /> destructive testing was one test per 500 lineal feet of weld. Golder identified and Poly-Flex <br /> obtained destructive samples from the geomembrane panel seams at a frequency of one <br /> destructive test sample per 347 lineal feet of fusion welded seams, and one per 93 lineal feet of <br /> extrusion welded seams. <br /> I\00\2182\EMMALPOND"TTINALDOC Golder Associates <br />