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ameO <br /> 3.03 GCL PLACEMENT <br /> A. 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 damaging the <br /> GCL. The orientation of the GCL should be in accordance with the design DRAWINGS, or <br /> MANUFACTURER recommendations if not otherwise specified. Packaging waste shall be disposed <br /> of daily into landfill or dumpster as designated by OWNER. <br /> B. Equipment, which could damage the GCL, shall not be allowed to travel directly on it. If the <br /> installation equipment causes rutting of the subgrade,the subgrade must be restored to its originally <br /> accepted condition before placement continues. <br /> C. Care must be taken to minimize the extent to which the GCL is dragged across the subgrade in order <br /> to avoid damage to the bottom surface of the GCL. A temporary geosynthetic subgrade covering <br /> commonly known as a slip sheet or rub sheet may be used to reduce friction damage during <br /> 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 wrinkles or folds,especially at the <br /> 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 with soil, a <br /> geomembrane, or a temporary waterproof tarpaulin. The GCL shall not be left uncovered overnight. <br /> If the GCL is hydrated when no confining stress is present, it may be necessary to remove and <br /> replace the hydrated material. The GCL supplier should be consulted for specific guidance if <br /> premature hydration occurs. <br /> G. When a textured geomembrane is installed over the GCL, a temporary geosynthetic covering known <br /> as a slip sheet or rub sheet should be used to minimize friction during placement to allow the textured <br /> geomembrane to be more easily moved into its fmal position. <br /> H. Although direct vehicular contact with the GCL is to be avoided, lightweight, low ground pressure <br /> vehicles such as four-wheel all-terrain vehicles (ATVs) may be used to facilitate the installation of <br /> any geosynthetic material placed over the GCL. The GCL MANUFACTURER or CQA Monitor <br /> should be contacted with specific recommendations on the appropriate procedures in this situation. <br /> I. Soil cover, where applicable, shall be placed in a manner that prevents the soil from entering the <br /> GCL overlap zones. Cover soil shall be pushed up slopes, not down slopes, to minimize tensile <br /> forces on the GCL. <br /> 3.04 EARTHWORKS <br /> A. Any earthen surface upon which GCL is installed shall be prepared and compacted in accordance <br /> with the SPECIFICATIONS and DRAWINGS. The surface shall be smooth, firm, and unyielding, <br /> and free of vegetation, construction debris, sticks, sharp rocks, void spaces, ice, abrupt elevation <br /> changes, standing water, cracks larger than one-quarter inch (0.25 in) in width, and any foreign <br /> matter that could contact the GCL. <br /> B. Immediately prior to GCL deployment,the subgrade shall be final-graded to fill in all voids or cracks <br /> and then smooth-rolled to provide the best practicable surface for the GCL. Prior to smooth-rolling, <br /> moisture shall be applied to the surface of the subgrade by a water truck or other means approved by <br /> Section 02776 2 Page 5 of 7 May 9,2012 <br /> Geosynthetic Clay Liner(GCL) Revision 1 <br />