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4 <br /> Cripple Creek&Victor Gold Mining Company t <br /> Squaw Gulch VLF Phase 2A Part 2 ■ <br /> Record of Construction Report <br /> 475.0106.032 <br /> October 24,2019(Revision 1) <br /> tested by TRI in Anaheim, CA. All conformance test results were reviewed by a NewFields <br /> representative and met the Technical Specifications.Third party conformance test results <br /> are presented for 40mil and 80mil geomembranes in Appendix K.1 and K.2, respectively. <br /> 3.4.2. Geomembrane Panel Deployment <br /> The SLF surface was inspected by the CQA monitor prior to geomembrane deployment, <br /> ensuring the surface was free of any protruding rock greater that 0.75" or irregularities <br /> (rutting, ridges, indentations, etc.) greater than 0.5". The SLF surface was approved by <br /> Tetra Tech, Tezak, CC&V, and the CQA Monitor prior to and during deployment each day. <br /> SLF acceptance forms are presented in Appendix E. During geomembrane panel <br /> deployment the CQA Monitor logged the dimensions of each panel, the roll number used <br /> for each panel, and measured the thickness of the panel edges. Roll numbers were <br /> checked against the site inventory to ensure only approved geomembrane was deployed. <br /> The Geomembrane Panel Deployment Summary is presented in Appendix J.1. <br /> 3.4.3. Geomembrane Fusion Seaming <br /> Double-wedge fusion welding was the primary method of geomembrane seaming for the <br /> Squaw Gulch VLF Phase 2A Part 2 project. Prior to fusion welding activities, trial welds <br /> were performed for each welding machine and welding technician combination for each <br /> type of geomembrane.The fusion welding trial seam logs are presented in Appendix J.2.1. <br /> The weld was inspected constantly for insufficient overlap, burnouts, or any other <br /> damage caused during the welding process. The CQA Monitor logged the welding <br /> machine and welding technician combination, the length of the seam, the direction the <br /> seam was welded, time of seaming, the welding machine temperature, and the welding <br /> machine speed. Destructive test samples were marked during fusion seaming and are <br /> discussed further in Section 3.4.5. Continuity conformance of the seam was also <br /> performed using pressure testing methods and is discussed further in Section 3.4.6. The <br /> Geomembrane Fusion Welding Summary is presented in Appendix J.3. <br /> 3.4.4. Geomembrane Extrusion Seaming <br /> At each construction bench, the deployed geomembrane was tied-into the previously <br /> placed geomembrane, overlapping a minimum of two feet. The tie-in was welded using <br /> extrusion welding methods. Any damage caused to the existing geomembrane, at the <br /> Phase 1 tie-in as it was exposed, was repaired by extending the overlap of new liner or by <br /> completely covering the damaged area with a patch. Prior to extrusion seaming activities, <br /> trial welds were performed for each welding machine and welding technician <br /> combination for each type of geomembrane. The trial seam logs are presented in <br /> Appendix J.2.2. As extrusion seaming was performed, proper techniques were verified <br /> P:\Projects\0106.032 VLF2 Phase 2 CQA\1-REPORTS\Cert Report-Phase 2A Part 2\DRMS Comments\475.0106.032 CCV PHASE 2A Part 2 <br /> ROC REPORT revl.docx <br /> Page 12 <br />