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Cripple Creek&Victor Gold Mining Company <br /> Squaw Gulch VLF Phase 2A Part 1 . <br /> Record of Construction Report <br /> 475.0106.032 <br /> July 22,2019 <br /> 2.7. Soil Liner Fill <br /> Approximately 24,670 cy of soil liner fill (SLF) was placed within the Squaw Gulch VLF Phase 2A <br /> Part 1 area. The as-built SLF surface is presented in Record Drawing No. 1. <br /> Materials from the Cameron borrow and WHEX pit were processed through a custom-designed <br /> rotary mill and screen in order to remove oversized rock and uniformly condition the material. <br /> After processing, the SLF was stockpiled in designated stockpiles around the site. <br /> The contractor used 30 and 40-ton articulated haul trucks to haul SLF from the local stockpiles <br /> to the Squaw Gulch VLF Phase 2A Part 1 footprint. The material was spread using LGP dozers <br /> equipped with GPS, and moisture conditioned in place by tandem-axel water trucks and <br /> laborers. A 19-ton smooth drum vibratory compactor, track-mounted skid steer with roller <br /> attachment, and excavator with smooth drum roller attachment were utilized to compact the <br /> SLF to a minimum thickness of 12 inches. The specified minimum density was 95 percent of the <br /> maximum dry density at minus 2 percent to plus 3 percent of optimum moisture content as <br /> determined by American Society for Testing and Materials (ASTM) D698. <br /> Laboratory testing, moisture content verification, nuclear density testing, depth verification, <br /> and visual inspection of the SLF were performed by the CQA Monitor prior to approval for <br /> geomembrane deployment. If deficient areas of the SLF were encountered, the area was <br /> reworked and retested until the area was compliant with the project Technical Specifications. <br /> All SLF was inspected and approved by the CQA Monitor, CC&V, Tezak, and Tetra Tech prior to <br /> geomembrane deployment. SLF acceptance is discussed further in Section 3.2.6 and Section <br /> 3.5.3. SLF acceptance forms are provided in Appendix F. <br /> 2.8. Geomembrane <br /> Tetra Tech installed approximately 666,080 square feet of 80 mil LLDPE DSMS geomembrane <br /> within the Squaw Gulch VLF Phase 2A Part 1 area as shown on Record Drawing No. 5. <br /> Fork lifts 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 tie-in 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 <br /> non-destructively tested using vacuum testing methods. Destructive testing was performed for <br /> both seaming types. The CQA Monitor observed and documented all geomembrane installation <br /> activities. <br /> P.\Projects\0106.032 VLF2 Phase 2 CQA\1-REPORTS\ROC Report 1\Cert Report-Phase 2A Part 1\475.0106.032 CCV PHASE 2A Part 1 <br /> ROC REPORT.docx <br /> Page 7 <br />