Laserfiche WebLink
• <br />the nonwoven geotextiles in the longitudinal overlap, then longitudinal bentonite- <br />enhanced seams are required as described below. <br />C. End-of-roll overlapped seams should be constructed with a minimum overlap of 24 <br />inches for Bentomat DN, or per the manufacturer's recommendations for an approved <br />equivalent GCL. Seams at the ends of the panels should be constructed such that they <br />are shingled in the direction of the grade to prevent the potential for runoff flow to <br />enter the overlap zone. <br />D. Bentonite-enhanced seams are constructed between the overlapping adjacent panels <br />described above. The underlying edge of the longitudinal overlap is exposed and then <br />a continuous bead of granular sodium bentonite is applied along a zone defined by the <br />edge of the underlying panel. A similar bead of granular sodium bentonite is applied <br />at the end-of-roll overlap. The granular bentonite shall be applied at a minimum <br />application rate of one quarter pound per lineal foot (0.25 lb/ft). <br />3.06 DETAIL WORK <br />A. The GCL shall be sealed around penetrations and embedded structures embedded in <br />accordance with the GCL Manufacturer recommendations. <br />B. Cutting the GCL should be performed using a sharp utility knife. Frequent blade <br />changes are recommended to avoid damage to the geotextile components of the GCL <br />during the cutting process. <br />• <br />3.07 DAMAGE REPAIR <br />A. If the GCL is damaged (torn, punctured, perforated, etc.) during installation, it may be <br />possible to repair it by cutting a patch to fit over the damaged area. The patch shall be <br />obtained from a new GCL roll and shall be cut to size such that a minimum overlap of <br />12 inches is achieved around all of the damaged area. Granular bentonite or bentonite <br />mastic should be applied around the damaged area prior. to placement of the patch. It <br />may be desirable to use an adhesive to affix the patch in place so that it is not <br />displaced during cover placement. <br />***END OF SECTION*** <br />• <br />Revision A <br />.1:\07\81745\0400\Orepadlinerdes_I IJan08\App B-Techspccs\02271-GCL.Doc <br />02271-6 January 2008