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i <br /> 3.4 GCL Placement <br /> A. The areas to be lined with GCL shall be agreed upon by the Installer and the Engineer <br /> prior to installation. <br /> B. GCL rolls should be delivered to the working area of the site in their original packaging. <br /> Immediately prior to deployment, the packaging should be carefully removed without <br /> damaging the GCL. The orientation of the GCL (i.e., which side faces up) should be in <br /> accordance with the Engineer's recommendations. <br /> C. Equipment which could damage the GCL shall not be allowed to travel directly on it. If <br /> the installation equipment causes rutting of the subgrade, the subgrade must be restored <br /> to its originally accepted condition before placement continues. <br /> D. 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 /> E. The GCL panels shall be placed parallel to the direction of the slope. <br /> F. All GCL panels should lie flat on the underlying surface, with no wrinkles or fold, <br /> especially at the exposed edges of the panels. <br /> G. 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, it <br /> may be necessary to remove and replace the hydrated material. The project Engineer, <br /> CQA inspector, and GCL supplier should be consulted for specific guidance if premature <br /> hydration occurs. <br /> 3.5 Anchorage <br /> A. As directed by the project drawings and specifications, the end of the GCL roll shall be <br /> placed in an anchor trench at the top of the slope or an equivalent runout design shall be <br /> utilized. When utilizing an anchor trench design, the front edge of the trench should be <br /> rounded so as to eliminate any sharp corners. Loose soil should be removed from the <br /> floor of the trench. The GCL should cover the entire trench floor but does not extend up <br /> the rear trench wall. <br /> 3.6 Seaming <br /> A. The GCL seams are constructed by overlapping their adjacent edges. Care should be <br /> taken to ensure that the overlap zone is not contaminated with loose soil or other debris. <br /> B. The minimum dimension of the longitudinal overlap should be 6 inches (150 mm) for <br /> Bentomat ST. If the GCL is manufactured with a grooved cut in the nonwoven geotextile <br /> that allows bentonite to freely extrude into the longitudinal overlap then no supplemental <br /> 2870 Forbs Avenue Hoffman Estates;IL 60292 <br /> 847.851.1800 1800.527.9948 <br /> www.CETCO.com <br />