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Newmont-Cripple Creek&Victor Gold Mine <br /> Technical Specification No.02776-O.DOCX ■ <br /> Squaw Gulch VLF <br /> Project No.475.0106.006 <br /> April 08,2016 <br /> 2.2. Seaming and Testing Equipment <br /> A. Seaming <br /> 1. Approved field seaming processes are hot shoe double fusion welding and <br /> extrusion welding, when approved by CERTIFYING ENGINEER. Use double <br /> fusion welding as primary method of seaming adjacent field panels. <br /> 2. CONTRACTOR shall maintain on-site a minimum of two spare operable seaming <br /> apparatuses. <br /> 3. Seaming equipment shall not damage the geomembrane. <br /> 4. CONTRACTOR may use a hot air device ("Leister") to temporarily bond <br /> geomembrane panels that are to be extrusion welded. <br /> 5. CONTRACTOR shall use extrusion welding apparatus equipped with gauges <br /> giving temperature of preheat and extrudate at nozzle of apparatus. <br /> 6. Welding rods or beads used for extrusion welding shall have the same physical <br /> properties as that used for the resin used in the manufacture of the type of <br /> .geomembrane that is being installed at the Squaw Gulch VLF Project. <br /> 7. CONTRACTOR shall use fusion welding apparatus which are self-propelled <br /> devices equipped with a gauge indicating temperature of heating element, and <br /> a gauge indicating the speed of the welding apparatus. <br /> B. Vacuum Testing (for extrusion seam only) The equipment shall consist of the <br /> following: <br /> 1. Vacuum box assembly consisting of: rigid housing, transparent viewing window, <br /> soft neoprene gasket attached to bottom of housing or porthole and valve <br /> assembly, and vacuum gauge. <br /> 2. Pump assembly equipped with pressure controller and pipe connections. <br /> 3. Rubber pressure/vacuum hose with fittings and connections. <br /> 4. Bucket of soapy solution. <br /> 5. Wide paint brush, or other means of applying soapy solution. <br /> C. Air Pressure Testing (for double fusion seam only) The equipment shall consist of the <br /> following: <br /> 1. Air pump (manual or motor driven), equipped with a pressure gauge, capable of <br /> generating, sustaining, and measuring pressure between 25 and 30 psi and <br /> mounted on a cushion to protect geomembrane. <br /> 2. Rubber hose with fittings and connections. Sharp hollow needle, or other <br /> approved pressure feed device. <br /> 3. An air pressure-monitoring device. <br /> Page 10 <br />