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<br />• <br />• <br />Cripple Creek & Victor Gold Mining Company <br />Cresson Project <br />Quality Assurance Monitoring and Test Results <br />Load Out Bin Relocation <br />July 7, 2009 <br />ameO <br />AMEC assigned each geomembrane panel a number. Geomembrane panels deployed in the <br />LOB were designated by numbering them P-1 through P-21 for the original panel layout and P- <br />1A through P-1 6A for the replaced panels. <br />AMEC marked the panel designation and roll number directly on each panel after it was <br />deployed. The geomembrane record drawing is presented in Appendix J-1. <br />During geomembrane deployment, AMEC measured sheet thickness with a digital caliper. <br />AMEC measured sheet thickness at five random locations along one edge of each <br />geomembrane panel. The average thickness specified for the 80-mil geomembrane was 93 <br />mils. Project specifications for 80-mil geomembrane required that the average of the five <br />thickness measurements be no less than the 80 mils, and that no individual measurement be <br />less than 72 mils. The average thickness specified for the 100-mil geomembrane was 125 mils. <br />Project specifications for 100-mil geomembrane required that the average of the five thickness <br />measurements be no less than the 100 mils, and that no individual measurement be less than <br />90 mils. The thickness monitoring provided by AMEC indicated that all of the panels met or <br />exceeded project requirements. <br />AMEC personnel measured deployed panel lengths by use of a measuring wheel. Recorded <br />lengths were approximate, and do not reflect any trimming or adjustments made for final <br />placement or anchor trench lengths. <br />AMEC personnel observed the surface of each deployed panel. AMEC logged any penetration <br />defects and marked them on the panel. Section 6.1.4 provides further discussion of repairs. <br />AMEC also observed the overlap of each panel with adjacent panels to verify that sufficient <br />overlap for seaming existed. AMEC logged insufficient panel overlaps as defects and marked <br />them for correction. <br />Ames surveyed all panel intersections and destructive seam sample locations. Using these <br />points, AMEC has provided the geomembrane panel layout record drawing in Figure 6. <br />6.1.3 Seaming <br />The double wedge fusion weld was the principal seaming method employed by Lonestar for this <br />project. Lonestar fusion seamed (welded) geomembrane on the same day that it was deployed. <br />Lonestar used extrusion welds for seaming where the LOB geomembrane tied into the <br />Phase IVc geomembrane. AMEC observed trial seam tests, monitored seaming equipment <br />temperatures and speed, and provided visual observation of the seaming procedures. AMEC <br />observed the entire lengths of all seams, patches, and other repairs either during seaming, or <br />shortly after completion. <br />SAPROJECTS\1125E CCV CQA\H3 - CONSTRUCTION\LOB CERT REPORT\REPORT BODY\LOB CERT REPORT 2009.07.07.DOC <br />19