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ame0 <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 2011 Phase 5 VLF OSA 3 Portion primary geomembrane layer are presented <br />in Appendix J.6. <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 35 <br />