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C. Stainless steel clamps shall be used to fasten the HDPE Low Volume Solution Collection <br />riser pipe to the polyethylene pipe boot as shown on the DRAWINGS. The stainless <br />steel clamps shall be approved by MANAGER and CERTIFYING ENGINEER prior to their <br />installation. <br />2.02 SEAMING AND TESTING EQUIPMENT: <br />A. Seaming <br />1. Approved field seaming processes are hat shoe double fusion welding and <br />extrusion welding, when approved by MANAGER and CERTIFYING ENGINEER. <br />Use double 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 i'Leister") to [emporarily bond <br />geomembrane panels chat 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 far extrusion welding shall have the same physical <br />properties as that used for the resin used in the manufacture of the n•pe of <br />geomembrane that is being installed at the Cresson Project. <br />7. CONTRACTOR shall use fusion welding apparatus which are self-propelled <br />devices equipped witha gauge indicating [emperature of heating element, and <br />a gauge indicating 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 <br />window, soft neoprene gasket attached to bottom of housing or part hole and <br />valve 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 so~ution. <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 drivenl, equipped with a pressure gauge, capable <br />March 26, 1996 Section 02776.0 <br />02776.0-13 Geomembrane <br />Revision 4 <br />