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ameO <br /> 2.02 SEAMING AND TESTING EQUIPMENT <br /> A. Seaming <br /> 1. Approved field seaming processes are hot shoe double fusion welding and extrusion <br /> welding, when approved by CERTIFYING ENGINEER. Use double fusion welding <br /> 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 geomembrane <br /> panels that are to be extrusion welded. <br /> 5. CONTRACTOR shall use extrusion welding apparatus equipped with gauges giving <br /> temperature of preheat and extrudate at nozzle of apparatus. <br /> 6. Welding rods or beads used for extrusion welding shall have the same physical properties <br /> as that used for the resin used in the manufacture of the type of geomembrane that is <br /> being installed at the mill site earthworks project. <br /> 7. CONTRACTOR shall use fusion welding apparatus which are self-propelled devices <br /> equipped with a gauge indicating temperature of heating element, and a gauge indicating <br /> the speed of the welding apparatus. <br /> B. Vacuum Testing(for extrusion seam only) <br /> The equipment shall consist of the following: <br /> 1. Vacuum box assembly consisting of: rigid housing, transparent viewing window, soft <br /> neoprene gasket attached to bottom of housing or porthole and valve assembly, and <br /> 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) <br /> The equipment shall consist of the 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 mounted on a <br /> cushion to protect geomembrane. <br /> 2. Rubber hose with fittings and connections. <br /> Section 02776 Page 12 of 22 May 9,2012 <br /> Geomembrane Revision 1 <br />