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0 ameO <br />If a pressure test failed, Lone Star checked the seam section for leakage, and repaired and <br />re-tested the seam. If Lone Star was unable to find the leak, the seam was divided into two <br />sections, with each section being tested to locate the area of concern. This subdivision <br />process was repeated until the leak location was identified. If the leak area was not located, <br />Lone Star reconstructed the seam, and then vacuum tested the repair. <br />Lone Star tested extrusion welded seam sections with a vacuum box. Prior to vacuum box <br />testing, Lone Star applied a soap and water solution to the seam section. The vacuum box <br />was then placed over the seam area and energized with a vacuum pump capable of <br />creating a vacuum of not less than 5 psi. Lone Star and AMEC observed the action of the <br />vacuum on the seam for a minimum of ten seconds. Each consecutively tested seam length <br />was overlapped a minimum of 3 inches. If soap bubbles appeared, AMEC marked and <br />documented the leak location. Lone Star then repaired the leak and vacuum tested the <br />repair. This procedure was also followed to test extrusion repairs and extrusion patches. <br />The seam non-destructive test summaries (fusion pressure tests and extrusion vacuum <br />tests) for the 2010 Phase OSA primary geomembrane layer are presented in Appendix J-6. <br />6.2 PSSA Geomembrane <br />CQA activities conducted by AMEC during the installation of the LLDPE geomembrane in <br />the Phase 5 PSSA consisted of the following: <br />• Conformance sampling and testing of the geomembrane; <br />• Observation and approval of the SLF or SF surface prior to deployment of <br />100-mil single-sided textured LLDPE geomembrane, 100-mil <br />double-sided textured LLDPE geomembrane, and 100-mil smooth LLDPE <br />geomembrane (secondary liner); <br />• Observation and approval of the LVSCF surface prior to deployment of <br />100-mil smooth or 100-mil double-sided textured geomembrane (primary <br />liner); <br />• Observation and documentation of geomembrane deployment, including <br />verifying sheet thickness and overlap and documenting panel layout; <br />AMEC Earth & Environmental, Inc. <br />2000 S. Colorado Blvd 2-1000 <br />Denver, CO 80222 <br />Tel 303-935-6505 <br />Fax 303-935-6575 www.amec.com <br />48