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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 /> certificates were reviewed by the CQA Monitor, ensuring all materials met or exceeded <br /> the project Technical Specifications. It is important to note that the Oven-Aging, UV- <br /> Aging, 2% Secant and Multi-Axial Tensile testing is considered formulation testing, and is <br /> only completed when a resin formula has changed to ensure that the resin/additive <br /> formula is adequate. The resin QC certificates for all geomembrane used within the <br /> Phase 2A Part 1 area are presented in Appendix J.4. <br /> 3.4.4. Geomembrane Welding Rod QC Certificates <br /> AGRU America manufactured the extrusion welding rod for the Squaw Gulch Phase 2A <br /> Part 1 VLF from various resin lots. The CQA Monitor reviewed and verified that all <br /> welding rod QC certificates that were provided by Chevron Phillips Chemical Company <br /> met the project Technical Specifications and was manufactured using the same type of <br /> resin. The welding rod QC certificates are presented in Appendix J.5. <br /> 3.4.5. Geotextile QC Certificates <br /> TenCate and Skaps Industries manufactured the 12 oz/yd2 non-woven geotextile that <br /> was used to construct the underdrain systems and leak detection trenches. The CQA <br /> Monitor verified that the geotextile QC certificates, presented in Appendix J.6, met the <br /> project Technical Specifications. <br /> 3.4.6. Geogrid QC Certificates <br /> Tensar manufactured the UX1800 uniaxial geogrid that was used in underground <br /> working remediation. The CQA Monitor verified that the geogrid QC certificates, <br /> presented in Appendix J.7, met the project Technical Specifications. <br /> 3.5. Geomembrane Construction Quality Assurance <br /> CQA performed on installed LLDPE geomembrane consisted of visual observations of panel <br /> deployment, double-wedge fusion seaming, extrusion seaming, extrusion welded repairs, non- <br /> destructive testing, and destructive testing. Fusion welded seams were non-destructively tested <br /> for continuity using pressure testing methods. Extrusion welds were non-destructively tested <br /> using vacuum testing methods. Fusion and extrusion welding methods were also tested <br /> destructively. All field sampling and testing was performed by Tetra Tech and observed by the <br /> CQA Monitor. Visual observations of field seams and panels were routinely made to inspect the <br /> seam for squeeze-out, melt, over-grind, and overlap. Defects and/or failed seams were marked <br /> and repaired in accordance with the specified repair procedures. <br /> P:\Projects\0106.032 VLF2 Phase 2 CQA\J-REPORTS\ROC Report 1\Cert Report-Phase 2A Part 1\475.0106.032 CCV PHASE 2A Part 1 <br /> ROC REPORT.docx <br /> Page 14 <br />