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3.2. GCL Manufacturing - The GCL supplied in accordance with this project shall be manufactured by needlepunching as described in Section 1.2 -Definitions. 3.2.1. The needlepunched GCL shall be thermally locked. The thermal lock process must heat set the nonwoven fibers where they protrude from the second geotextile (woven or nonwoven depending upon product) to more permanently secure the reinforcement in place. Other means may be used to lock the fibers in place if the process demonstrates similar performance to the thermal lock process. 3.2.2. To demonstrate the uniformity of the manufacturing process, no delamination of the geotextile components from the bentonite core shall occur when the GCL is exposed to 80 degree tap water for one hour. 3.3. Alternative Materials -Prior to considering an alternative GCL material,the Contractor shall submit certified test results and statements of quality from the proposed GCL supplier to the engineer, indicating without exception that the proposed GCL meets the requirements of this specification. Submittals shall be delivered to the engineer a minimum of five business days in advance of the bid. No other manufacturing techniques shall be approved unless it can be suitably demonstrated that the GCL exhibits uniform shear strength characteristics across the entire width of the panel. Isolated sewn or stitched rows do not constitute uniform reinforcement for the purposes of this specification. 3.4. GCL Physical Properties - The GCL material shall be in accordance with the test methods, test frequencies and material physical properties as listed in the Appendix. 3.4.1. Standard Conditions - For projects where a standard woven - bentonite - nonwoven GCL will provide sufficient interface shear properties, the GCL supplied for this project shall be in accordance with the test methods, test frequencies and material physical properties as listed in Appendix A. 3.4.2. Steep Slopes - For slope applications where the interface shear strengths require a nonwoven - bentonite - nonwoven GCL, the GCL supplied for this project shall be in accordance with the test methods, test frequencies and material physical properties as listed in Appendix B. 3.5. Dimensions -The minimum acceptable dimensions for the GCL panels shall be 15 feet wide and 125 feet long. Short rolls (rolls less than 125 feet long)may be supplied, but at a rate not to exceed 5% of the total square footage produced for this project. 3.6. Overlap Markings -A minimum overlap guide-line and a construction match-line delineating the overlap zone shall be imprinted with non-toxic ink on both edges of the GCL panel to ensure the accuracy of the seam. These lines shall be used during CQA to ensure the minimum overlap is achieved. The minimum overlap guideline shall indicate where the edge of the panel must be placed in order to achieve a full six inches of bentonite overlap for each panel. Bentofix Drop-In Specification Bentofix is a registered trademark ofNAUE GmbH&Co.KG 5 Rl/13/06