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PART VIII <br /> Defects and Repairs <br /> 8.1.0 Identification <br /> All seams and non-seam areas of the geomembrane shall be examined by CLC for <br /> identification of defects, holes, blisters, un-dispersed raw materials and any sign of <br /> contamination by foreign matter. <br /> Defective/damaged materials shall be identified via a deficiency report, either separately <br /> or on the Daily Report. Actions taken to resolve or correct the problem will also be <br /> recorded on the similar form. <br /> Defects, holes, blisters, un-dispersed raw materials, signs of contamination by foreign <br /> matter, unacceptable welds in geomembranes and other unsatisfactory conditions will be <br /> identified on the Daily Report form. The repair/corrective action to"fix"the problem will <br /> also be recorded on a similar form. <br /> 8.2.0 Repair Procedures <br /> Available methods include: <br /> Patching - used to repair large holes, tears, and contamination by foreign matter. <br /> Grinding and re-welding - used to repair small sections of extruded seams. <br /> Spot welding or seaming - used to repair pinholes or other minor localized flaws; <br /> Capping - used to repair large lengths of failed seams; <br /> Methods for patching lining system defects shall consist of welding patches or caps over <br /> such areas using the same membrane lining material as used on the specific project. <br /> Patches or caps shall extend at least 6 inches beyond the edge of the defect,and all <br /> comers of patches shall be rounded with a radius of at least 3 inches. <br /> Seaming, preparation and welding equipment deployment procedures previously <br /> addressed in this manual shall be adhered to during patching operations. <br /> 8.2.1 Verification of Repairs <br /> Each repair shall be non-destructively tested using the methods described in <br /> Section 6 as appropriate. Repairs which pass the non-destructive test, shall <br /> be taken as an indication of an adequate repair. Failed tests indicate that the repair shall <br /> be redone and re-tested until a passing test result is obtained. <br /> Part IX <br /> Ancillary Items and Final Acceptance <br /> 9.1.0 Pipe Penetrations <br /> Pipes penetrating through the lined area shall be sealed using pipe boot details that are <br /> welded to the lining system via extrusion weld method and sealed the pipe with double <br /> stainless steel banding clamps and butyl sealant tape. Pipe boots shall be fabricated from <br /> the membrane material being installed and shall fit snugly over the pipe and pipe to <br /> grade interface without undue slack or bridging. In instances where piping is <br /> Created by Colorado Lining International 1-800-524-8672 13 <br />