2009-12-21_REVISION - M1980244 ‎(32)‎

• Permit No: M1980244
• IBM Index Class Name: REVISION
• Doc Date: 12/21/2009
• Doc Name: QA Liner Recert- App. E, Tech Specs. 2
• From: CC&V
• To: DRMS
• Type & Sequence: AM9
• Media Type: D
• Archive: No

2.02 SEAMING AND TESTING EQUIPMENT
A. Seaming
1. Approved field seaming processes are hot shoe double fusion welding and extrusion
welding, when approved by CERTIFYING ENGINEER. Use double fusion welding as
primary method of seaming adjacent field panels.
2. CONTRACTOR shall maintain on -site a minimum of two spare operable seaming
apparatuses.
3. Seaming equipment shall not damage the geomembrane.
4. CONTRACTOR may use a hot air device ( "Leister ") to temporarily bond geomembrane
panels that are to be extrusion welded.
5. CONTRACTOR shall use extrusion welding apparatus equipped with gauges giving
temperature of preheat and extrudate at nozzle of apparatus.
6. Welding rods or beads used for extrusion welding shall have the same physical properties
as that used for the resin used in the manufacture of the type of geomembrane that is
being installed at the Cresson Project.
7. CONTRACTOR shall use fusion welding apparatus which are self - propelled devices
equipped with a gauge indicating temperature of heating element, and a gauge indicating
the speed of the welding apparatus.
B. Vacuum Testing (for extrusion seam only)
The equipment shall consist of the following:
1. Vacuum box assembly consisting of. rigid housing, transparent viewing window, soft
neoprene gasket attached to bottom of housing or porthole and valve assembly, and
vacuum gauge.
2. Pump assembly equipped with pressure controller and pipe connections.
3. Rubber pressure /vacuum hose with fittings and connections.
4. Bucket of soapy solution.
5. Wide paint brush, or other means of applying soapy solution.
C. Air Pressure Testing (for double fusion seam only)
The equipment shall consist of the following:
1. Air pump (manual or motor driven), equipped with a pressure gauge, capable of
generating, sustaining, and measuring pressure between 25 and 30 psi and mounted on a
cushion to protect geomembrane.
® 2. Rubber hose with fittings and connections.
Section 02776 Page 12 of 22 September 3, 2008
Geomembrane Revision 1
SAProjects \1125E CCV CQA \I - Tech Specs \02776.0.doc