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Cripple Creek & Victor Gold Mining Company <br />Squaw Gulch VLF Phase 1 <br />(9,550-foot Elevation Bench to Geomembrane Panel P1635) <br />Final Report <br />Quality Assurance Monitoring & Test Results <br />January 2016 <br />Project No.: 74201125N0 Page 13 <br />3.0 GEOSYNTHETICS INSTALLATION <br />Geosynthetics installed consisted of geotextile and geomembrane. Non-woven <br />geotextile (12 oz/yd2) manufactured by TenCate Geosynthetics was used to construct <br />the secondary and tertiary underdrains within the limits of the Project. The <br />geomembrane liner system includes 80-mil LLDPE DSMS LLDPE geomembrane <br />manufactured by Agru America. The 40-mil LLDPE smooth geomembrane was used in <br />the LDS. <br />3.1 Underdrain System <br />Geosynthetics installation for the secondary and tertiary underdrains was performed by <br />Ames and included deployment of 12 oz/yd2 non-woven geotextile. Ames installed <br />approximately 39,372 square feet of geotextile to construct the underdrains. Underdrain <br />construction is discussed further in Section 2.2. <br />3.2 Leak Detection System <br />Ames installed approximately 16,109 square feet of 40-mil smooth LLDPE <br />geomembrane and 16,109 square feet of 12-oz/yd2 non-woven geotextile for <br />construction of the LDS. To construct the LDS, Ames placed a layer of 40-mil smooth <br />LLDPE geomembrane in the trench and placed geotextile over the geomembrane. After <br />the piping and the LDF were placed in the trench, the geotextile was wrapped around <br />the fill with a minimum 1-foot overlap as shown on Detail V of IFC Drawing A260. <br /> 40-mil Smooth LLDPE Geomembrane <br />The 40-mil Smooth LLDPE geomembrane liner was used to construct the leak detection <br />trench. The liner was installed in long “strips” with a 5-foot overlap. Liner conformance <br />testing was performed on the geomembrane. The conformance testing is presented in <br />Appendix K.2. An Amec Foster Wheeler representative was present during installation <br />and construction of the leak detection trenches. <br />3.3 Project Geomembrane Liner System <br />Geomembrane installation activities for the geomembrane liner system include <br />deployment; seaming; and non-destructive and destructive testing of 80-mil DSMS <br />LLPDE geomembrane. Ames anchored geomembrane at the limits of the construction <br />bench in a minimum 2-foot-wide, by 3-foot-deep anchor trench. All geomembrane was <br />placed on compacted and approved SLF. Geomembrane panels were designated with <br />a “P” followed by an individual panel number. Some panels were deployed outside of <br />this report’s approval area, but numbering remained consecutive. A total area of <br />3,196,924 square feet of geomembrane liner was deployed. See ROC Drawing No. 6 <br />Appendix A for the as-built panel layout.