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Newmont Mining Corporation <br /> Record of Construction Report ■ <br /> VLF2 Recertification Project <br /> Subgrade and Geomembrane 9650'—9750'Elevations <br /> NewFields Project No.47S.0106.026 <br /> July 3,2018 <br /> 3.3. Damaged Geomembrane Removal <br /> After the geomembrane was exposed and the damaged area was identified, it was removed using <br /> a CAT track mounted excavator. The removed geomembrane was discarded into roll off trash <br /> receptacles and removed from site. <br /> 3.4. Existing SLF Preparation <br /> Prior to geomembrane installation,the existing SLF depth was verified and the subgrade surface <br /> to receive geomembrane was compacted using a track mounted excavator with a smooth drum <br /> compactor attachment. The SLF was inspected and approved by Comanco, Ames and NewFields <br /> prior to geomembrane deployment. <br /> 3.4.1. SLF Testing <br /> Due to the existing SLF layer being intact and undisturbed, laboratory and density testing were <br /> not performed as it was tested and approved during Squaw Gulch Phase 1 VLF construction.The <br /> surface was compacted to ensure the surface met the requirements the Technical Specifications <br /> for geomembrane deployment. <br /> 3.4.1.1. SLF Depth Checks <br /> Depth checks were performed in accordance with the Technical Specifications to ensure that the <br /> SLF was not displaced in the VLF2 Recertification area between the 9650' and 9750' elevations. <br /> The depth check frequency for SLF is two tests for every acre. Four SLF depth checks were <br /> required. Twenty-three SLF depth checks were performed within the VLF2 Recertification area <br /> between the 9650' and 9750' elevations with passing results. SLF depth checks locations and <br /> results are shown on Drawing 1. <br /> 3.5. Geomembrane Installation <br /> Comanco installed approximately 77,445 square feet of 80 mil LLDPE DSMS geomembrane within <br /> the VLF2 Recertification between the 9650' and 9750' elevations. The recertification area <br /> certified in this report is shown on Drawing 2. Fork lifts were used to transport and deploy the <br /> geomembrane panels parallel to the slopes to minimize stress on seams. Double-wedge fusion <br /> welding was the primary method of geomembrane seaming. Extrusion welding methods were <br /> used to perform tie-in seaming, defect repairs and detail activities. Continuity conformance of <br /> fusion welded seams was performed using pressure testing methods, while extrusion welded <br /> seams and repairs were non-destructively tested using vacuum testing methods. Destructive <br /> testing was performed for both seaming types. The CCIA Monitor observed and documented all <br /> Page 6 <br />