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C. All stored GCL materials and the accessory bentonite must be covered with a plastic <br />sheet or tarpaulin until their installation. <br />D. The integrity and legibility of the labels shall be preserved during storage. <br />3.03 GCL PLACEMENT <br />Revision A <br />A. GCL rolls should be delivered to the working area of the site in their original <br />packaging. Immediately prior to deployment, the packaging should be carefully <br />removed without damaging the GCL. The orientation of the GCL (i.e., which side <br />faces up) should be in accordance with the Engineer's recommendations. <br />B. Equipment, which could damage the GCL, shall not be allowed to travel directly on it. <br />If the installation equipment causes rutting of the subgrade, the subgrade must be <br />restored to its originally accepted condition before placement continues. <br />C. Care must be taken to minimize the extent to which the GCL is dragged across the <br />subgrade in order to avoid damage to the bottom surface of the GCL. A temporary <br />geosynthetic subgrade covering commonly known as a slip sheet or rub sheet may be <br />used to reduce friction damage during placement. <br />D. The GCL panels shall be placed parallel to the direction of the slope. <br />E. All GCL panels should lie flat on the underlying surface, with no wrinldes or fold, <br />especially at the exposed edges of the panels. <br />F. Only as much GCL shall be deployed as can be covered at the end of the working day <br />with soil, a geomembrane, or a temporary waterproof tarpaulin. The GCL shall not be <br />left uncovered overnight. If the GCL is hydrated when no confining stress is present, <br />it may be necessary to remove and replace the hydrated material. The GCL supplier <br />should be consulted for specific guidance if premature hydration occurs. <br />3.04 ANCHORAGE <br />A. The end of the GCL roll shall be placed in an anchor trench at the top of the slope or <br />an equivalent runout design shall be utilized. When utilizing an anchor trench design, <br />the front edge of the trench should be rounded so as to eliminate any sharp corners. <br />Loose soil should be removed from the floor of the trench. The GCL should cover the <br />entire trench floor but does not extend up the rear trench wall. <br />3.05 SEAMING <br />A. The GCL seams are constructed by overlapping adjacent panel edges and ends. Care <br />should be taken to ensure that the overlap zone is not contaminated with loose soil or <br />other debris. <br />B. Longitudinal seams should be overlapped a minimum of 6 inches for Bentomat DN, or <br />per the manufacturer's recommendations for an approved equivalent GCL. If the <br />GCL is manufactured with a grooved cut in the nonwoven geotextile that allows <br />bentonite to freely extrude into the longitudinal overlap, then no bentonite - enhanced <br />seam is required for this overlap. If the GCL does not have a grooved cut in one of <br />.1 'OT\81745 \0400 \OrepadLverdes_ I IJan08'App B- Techspecs \02271 - GCL.Doc <br />02271 -5 January 2008 <br />