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Cripple Creek & Victor Gold Mining Company <br />Mill Site Earthworks Project <br />Final Report <br />Quality Assurance Monitoring & Test Results <br />January 31, 2014 <br />ameO <br />sections were located and passing pressure tests were performed, or the outer edge of <br />the seam was extrusion welded and vacuum tested. <br />If a pressure test failed, Lone Star checked the seam section for leakage, and repaired <br />and re- tested the seam. If Lone Star was unable to find the leak, the seam was <br />divided into two sections, each section being tested to locate the area of concern. This <br />subdivision process was repeated until the leak location was identified. If the leak area <br />was not located, Lone Star capped the seam and vacuum tested the repair. <br />Lone Star tested extrusion welded seam sections with a vacuum box. Prior to vacuum <br />box testing, a soap and water solution was applied to the seam section. The vacuum <br />box was placed over the seam area and energized with a pump capable of creating a <br />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 10 seconds. Each consecutively tested seam <br />length was overlapped a minimum of 3 inches. If soap bubbles appeared, AMEC <br />marked and documented the leak location. Lone Star repaired the leak and vacuum <br />tested the repair. This procedure was also followed to test extrusion welds associated <br />with repairs and patches. <br />The seam non - destructive test summaries (fusion pressure tests and extrusion <br />vacuum tests) for the Mill Site Earthworks Project geomembrane layer are presented <br />in Appendix J.6. <br />27 <br />