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amec <br /> foster <br /> wheeler <br /> Zephyr Gold USA Ltd. PAGE 7 OF 17 <br /> Dawson Gold Project SEC. NO.: <br /> Dawson Filtered Tailings Storage Facility SPECIFICATION 02776.0 <br /> Pre-feasibility Study <br /> TECHNICAL SPECIFICATIONS FOR DATE: (ORIGINAL) <br /> Fremont County, Colorado GEOMEMBRANE 20-October-16 <br /> PROJECT NO.: 74201633 REVISION: A <br /> DATE: 20-Oct-16 <br /> TABLE 02776.0-1 <br /> HDPE GEOMEMBRANE RESIN PROPERTIES <br /> Property Test Method Requirements <br /> Base Resin Specific Gravity (g/ml) ASTM D1505 >0.932 <br /> Melt Flow Index(g/10 min.) ASTM D1238 :51.0 <br /> The MANUFACTURER of HDPE products is required to meet the Geosynthetic Research Institute (GRI) <br /> Test Method GM13 standards. <br /> The geomembrane sheet shall be comprised of a minimum ninety-six(96) percent pure polyethylene. The <br /> remaining portion shall be made up of materials necessary for the performance of the liner(such as carbon <br /> black, anti-oxidants, etc.). The geomembrane rolls shall meet the following SPECIFICATIONS: <br /> • The surface of the geomembrane shall not have striations, roughness (except texture as specified), <br /> pinholes, or bubbles and shall be free of holes, blisters, undispersed raw materials, or any <br /> contamination by foreign matter. MANAGER and CONSTRUCTION MANAGER may request <br /> additional testing in order to support such acceptance. All such testing shall be done at the sole <br /> expense of the CONTRACTOR. <br /> • Contain a maximum of two (2) percent by weight of additives, fillers or extenders (not including <br /> carbon black). <br /> • Contain between two (2) percent and three (3) percent carbon black for ultra-violet light resistance. <br /> • The geomembrane rolls shall have the properties presented in Table 02776.0-2 for single-sided <br /> textured HDPE geomembrane. <br /> S:\ZEPHYR MINERALS\DRMS MINE APPLICATION\02776-GEOMEMBRANE.DOCX <br />