2019-09-30_REVISION - M1980244 (5)

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Cripple Creek&Victor Gold Mining Company ■ Squaw Gulch VLF Phase 2A Part 2 ■ Record of Construction Report 475.0106.032 September 30,2019 tested by TRI in Anaheim, CA.All conformance test results were reviewed by a NewFields representative and met the Technical Specifications.Third party conformance test results are presented for 40mil and 80mil geomembranes in Appendix K.1 and K.2, respectively. 3.4.2. Geomembrane Panel Deployment The SLF surface was inspected by the CQA monitor prior to geomembrane deployment, ensuring the surface was free of any protruding rock greater that 0.75" or irregularities (rutting, ridges, indentations, etc.) greater than 0.5". The SLF surface was approved by Tetra Tech,Tezak, CC&V, and the CQA Monitor prior to and during deployment each day. SLF acceptance forms are presented in Appendix E. During geomembrane panel deployment the CQA Monitor logged the dimensions of each panel,the roll number used for each panel, and measured the thickness of the panel edges. Roll numbers were checked against the site inventory to ensure only approved geomembrane was deployed. The Geomembrane Panel Deployment Summary is presented in Appendix J.1. 3.4.3. Geomembrane Fusion Seaming Double-wedge fusion welding was the primary method of geomembrane seaming for the Squaw Gulch VLF Phase 2A Part 2 project. Prior to fusion welding activities, trial welds were performed for each welding machine and welding technician combination for each type of geomembrane.The fusion welding trial seam logs are presented in Appendix J.2.1. The weld was inspected constantly for insufficient overlap, burnouts, or any other damage caused during the welding process. The CQA Monitor logged the welding machine and welding technician combination, the length of the seam, the direction the seam was welded, time of seaming, the welding machine temperature, and the welding machine speed. Destructive test samples were marked during fusion seaming and are discussed further in Section 3.4.5. Continuity conformance of the seam was also performed using pressure testing methods and is discussed further in Section 3.4.6. The Geomembrane Fusion Welding Summary is presented in Appendix J.3. 3.4.4. Geomembrane Extrusion Seaming At each construction bench, the deployed geomembrane was tied-into the previously placed geomembrane, overlapping a minimum of two feet. The tie-in was welded using extrusion welding methods. Any damage caused to the existing geomembrane, at the Phase 1 tie-in as it was exposed,was repaired by extending the overlap of new liner or by completely covering the damaged area with a patch. Prior to extrusion seaming activities, trial welds were performed for each welding machine and welding technician combination for each type of geomembrane. The trial seam logs are presented in Appendix J.2.2. As extrusion seaming was performed, proper techniques were verified P:\Projects\Cert Report-Phase 2A Part 2\475.0106.032 CCV PHASE 2A Part 2 ROC REPORT.docx Page 12