2018-07-05_REPORT - M1980244 - Laserfiche WebLink

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Newmont Mining Corporation Record of Construction Report ■ VLF2 Recertification Project Subgrade and Geomembrane 9650'—9750'Elevations NewFields Project No.475.0106.026 July 3,2018 5.1.1. Third Party Conformance Testing 5.1.1.1. Manufactured Geomembrane Third party conformance test samples were obtained at a rate of one test for every 38,722 square feet and two for the one resin lot used. The specifications require at least one test sample for every 150,000 square feet and at least one test for each resin lot. Samples were 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 in Appendix F.1. 5.1.1.2. Existing Geomembrane The existing geomembrane that was exposed and tied into was also tested and met requirements of Technical Specifications for conformance test samples.The existing geomembrane test sample locations are shown on Drawings 3 and testing results are presented in Appendix F.2. 5.1.2. 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 than 0.75" or irregularities (rutting, ridges, indentations, etc.) greater than 0.5". The SLF surface was approved by Comanco, Ames, CC&V, and NewFields prior to and during deployment each day. SLF acceptance forms are presented in Appendix C. 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 E.I. 5.1.3. Geomembrane Fusion Seaming Double-wedge fusion welding was the primary method of geomembrane seaming for the VLF2 Recertification for subgrade and geomembrane between the 9650' and 9750'. Prior to fusion welding activities, trial welds were performed for each welding machine and welding technician combination. The fusion welding trial seam logs are presented in Appendix E.2. 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 testing is discussed further in Section 5.1.5. Continuity conformance of the seam is also performed using pressure tested methods and is discussed further in Section 5.1.6. The Geomembrane Fusion Welding Summary is presented in Appendix E.4. Page 9