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E. Geomembrane deployment shall proceed between ambient temperatures of fourteen <br />degrees (14° F) Fahrenheit to one-hundred degrees (100°) Fahrenheit. Geomembrane <br />placement shall not be done during any precipitation, in the presence of excessive <br />moisture le.g., tog, rain, decal or in the presence of excessive winds, as determined by <br />the CQA Monitor. <br />F, Following the installation of the geomembrane, an examination of the entire surface <br />shall be conducted to detect potentially harmful objects. Any such objects will be <br />removed and the geomembrane repaired by the CONTRACTOR, at no cost to OWNER. <br />3.06 FACTORY SEAMS; <br />MANAGER and CERTIFYING ENGINEER may require CONTRACTOR to test up to as much as <br />twenty percent 120%) of factory fusion welds Inon-destructive air pressure test) in the field to <br />verify tactory test results. Additional testing at CONTRACTOR's expense will be required if <br />tailed tests are obtained in the field. <br />3.07 FIELD SEAMS: <br />A. Seam Layout <br />1. Seams shall be oriented parallel to the line of maximum slope, i.e., oriented <br />down, not across the slope. In corners and odd-shaped geometric locations, <br />the number of field seams shall be minimized. <br />2. No horizontal or base T-seam or tie-in seams shall be closer than five (51 feet <br />from the toe of the slope. Seams shall be aligned to prevent wrinkles and <br />"fishmouths". If a fishmouth or wrinkle is found, it shall be relieved antl <br />capped. <br />3. Panels of geomembrane wilt have sufticient overlap provided to allow peel tests <br />[o be performed on the seam. <br />B. Seaming Method <br />1. The procedure used to temporarily bond adjacent panels together shall not <br />damage the geomembrane; in particular, the temperature of hot air at the nozzle <br />of any spat welding apparatus shall be convalled such that the geomembrane <br />is not damaged. <br />2. CONTRACTOR shall use double fusion welding as primary method of seaming <br />adjacent field panels. <br />a, Far uoss seam tees associated with fusion welding, CONTRACTOR <br />shall patch panel intersections consisting of 3 or more panels and <br />extrusion weld to a minimum distance of 4 inches an each side of <br />patch. The edge of the sheet shall be ground to a 45° angle prior to <br />welding. <br />b. Place a protectfve layer, e.g., insulting plate or fabric, beneath hat <br />welding apparatus after usage. <br />c, When subgrade conditions dictate, use a moveable protective layer <br />March 26, 1996 Section 02776.0 <br />02776.0.18 Geomembrane <br />Revision 4 <br />