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amec <br /> foster <br /> wheeler <br /> Zephyr Gold USA Ltd. PAGE 9 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 /> 3.0 SEAMING AND TESTING EQUIPMENT: <br /> 3.1 SEAMING <br /> Approved field seaming processes are hot shoe double fusion welding and extrusion welding, when <br /> approved by ENGINEER. Use double fusion welding as primary method of seaming adjacent field panels. <br /> CONTRACTOR shall maintain on-site a minimum of two spare operable seaming apparatuses. <br /> Welding rods or beads used for extrusion welding shall have the same physical properties as the resin used <br /> in the manufacture of the type of geomembrane that is being installed at the project. <br /> CONTRACTOR shall use fusion welding apparatus which are self-propelled devices equipped with a gauge <br /> indicating temperature of heating element, and a gauge indicating the speed of the welding apparatus. <br /> 3.2 VACUUM TESTING (FOR EXTRUSION SEAM ONLY) <br /> The equipment shall consist of the following: <br /> • Vacuum box assembly consisting of: rigid housing, transparent viewing window, soft neoprene <br /> gasket attached to the bottom of the housing or port hole and valve assembly, and vacuum gauge; <br /> • Pump assembly equipped with pressure controller and pipe connections; <br /> • Rubber pressure/vacuum hose with fittings and connections; <br /> • Bucket of soapy solution; and <br /> • Wide paint brush or other means of applying soapy solution. <br /> 3.3 AIR PRESSURE TESTING (FOR DOUBLE FUSION SEAM ONLY) <br /> The equipment shall consist of the following: <br /> • Air pump (manual or motor driven), equipped with a pressure gauge, capable of generating, <br /> sustaining, and measuring pressure between 25 and 30 psi and mounted on a cushion to protect <br /> geomembrane; <br /> • Rubber hose with fittings and connections; <br /> • Sharp hollow needle, or other approved pressure feed device; and <br /> • An air pressure monitoring device. <br /> S:\ZEPHYR MINERALS\DRMS MINE APPLICATION\02776-GEOMEMBRANE.DOCX <br />