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<br />P:\Projects\0106.071 2025 Resident\J-REPORTS\VLF2 P3 Stage B.1 <br />RoC Page 10 <br />The contractor used 35-ton, 40-ton, and 45-ton articulated haul trucks to haul SLF from <br />the Upper Dump 1 stockpile to the VLF2 Phase 3 Stage B footprint. The material was spread <br />using D6, D8, and John Deere 950K dozers equipped with GPS, and moisture conditioned in place <br />by 740 water trucks and laborers where required. The material was placed over thick initially and <br />then trimmed with dozers in front of Geomembrane deployment. A 12-ton smooth drum <br />vibratory roller, track-mounted skid steer with roller attachment, and mini excavator with <br />vibrating plate attachment were utilized to compact the SLF to a minimum thickness of 12 inches. <br />The specified minimum density was 95 percent of the maximum dry density with a moisture <br />content within minus 2 percent to plus 3 percent of optimum as determined by American Society <br />for Testing and Materials (ASTM) D698. <br />Laboratory testing, moisture content verification, nuclear density testing, depth verification, and <br />visual inspection of the SLF were performed by NewFields CQA prior to approval for <br />geomembrane deployment. If deficient areas of the SLF were encountered, the area was <br />reworked and retested until they met the project Technical Specifications. All SLF was inspected <br />and approved by the CQA Monitor, CC&V, KTI, and EC Applications prior to geomembrane <br />deployment. SLF laboratory testing is discussed in Section 3.2.2. SLF acceptance forms are <br />provided in Appendix D. <br />2.5. 80-mil Geomembrane <br />EC Applications installed approximately 1,180,000 square feet of 80-mil LLDPE geomembrane <br />within the VLF2 Phase 3 Stage B.1 area as shown on Record of Construction Drawing Number 3. <br />The edge of geomembrane along the outside perimeter, and northern side of the project limits, <br />intended to connect with future construction phases, was protected by burying it within a <br />permanent anchor trench. The western limits of the geomembrane were connected to the Stage <br />A.2 perimeter. <br />Forklifts were used to transport and deploy the geomembrane panels parallel to the slopes to <br />minimize stress on seams. Double-wedge fusion welding was the primary method of <br />geomembrane seaming. Extrusion welding methods were used to perform connection seaming, <br />defect repairs, and detail activities. Continuity conformance of fusion welded seams was <br />performed using pressure testing methods, while extrusion welded seams and repairs were non- <br />destructively tested using vacuum testing methods. Destructive testing was performed for both <br />seaming types. The CQA Monitor observed and documented all geomembrane installation and <br />repair activities, as provided in Appendix I. <br />2.6. Drain Cover Fill <br />Approximately 87,890 cy of crushed ore Drain Cover Fill (DCFO) was placed in accordance with <br />the project Technical Specifications. To produce DCFO, durable ore was delivered to the crusher, <br />where it was processed to meet the 3-inch-minus technical specification. After processing, the <br />DCFO was stockpiled east of VLF2 in an area designated by CC&V. KTI used 40-ton articulated