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Cripple Creek & Victor Gold Mining Company <br />Cresson Project <br />Quality Assurance Monitoring and Test Results <br />Phase 4B/C Triangle Liner Certification <br />August 10, 2010 <br />If a pressure test failed, Lonestar checked the seam section for leakage, and repaired and <br />re-tested the seam. If Lonestar 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 process <br />was repeated until the leak location was identified. If the leak area was not located, Lonestar <br />reconstructed the seam, and then vacuum tested the repair. <br />Lonestar tested extrusion welded seam sections with a vacuum box. Prior to vacuum box <br />testing, Lonestar applied a soap and water solution to the seam section. The vacuum box was <br />then placed over the seam area and energized with a vacuum pump capable of creating a <br />vacuum of not less than 5 psi. Lonestar and AMEC observed the action of the vacuum on the <br />seam for a minimum of ten seconds. Each consecutively tested seam length was overlapped a <br />minimum of 3 inches. If soap bubbles appeared, AMEC marked and documented the leak <br />location. Lonestar then repaired the leak and vacuum tested the repair. This procedure was <br />also followed to test extrusion repairs and extrusion patches. <br />The seam non-destructive test summaries (fusion pressure tests and extrusion vacuum tests) <br />for the geomembrane are presented in Appendix H-5. <br />S:\PROJECTS\1125E CCV CQA\H2 - DESIGN\TRIANGLE\FINAL\TRIANGLE CERTIFICATION REPORT FINAL REVI.DOC 20