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SECTION 4 – SANITARY <br />71 <br />coating surface with grit disk paper or other hand tooling method. After abrading and cleaning, <br />additional protective coating material can be hand applied to the repair area. All touch-up/repair <br />procedures shall follow the protective coating manufacturer's recommendations. <br />3.) Adhesion Testing: The adhesion tests shall be performed on a minimum of one (1) or fifteen <br />percent (15%) of all rehabilitated and lined structures, whichever is greater. Adhesion testing <br />shall be conducted after the liner system has cured per manufacturer instruction and in <br />accordance with ASTM D4541 as modified herein. A minimum of one (1) twenty (20) mm <br />dolly shall be affixed to the lined surface of the structure at the upper section or cone area, mid- <br />section, and at the bottom, unless otherwise specified in the Special Provisions. Each testing <br />location shall be identified by the City Engineer. The adhesive used to attach the dollies to the <br />liner shall be rapid setting with tensile strength in excess of the liner material and permitted to <br />cure in accordance with manufacturer recommendations. The lining material and dollies shall <br />be adequately prepared to receive the adhesive. Prior to pull test, utilize a scoring device to cut <br />through the coating until the substrate is reached. Extreme care shall be required while scoring <br />to prevent micro cracking in the coating, since cracks may cause failures at diminished <br />strengths. Failure due to improper dolly adhesive or scoring shall require retesting. The pull <br />tests in each area shall meet or exceed 200 psi and shall include subbase adhered to the back of <br />the dolly or no visual signs of coating material in the test hole. Pull tests with results between <br />a minimum 150 psi and 200 psi shall be acceptable if more than fifty percent (50%) of the <br />subsurface is adhered to the back of the dolly. A test result can be discarded, as determined by <br />the City Engineer, if there is a valid non-statistical reason for discarding the test results as <br />directed by Sections 8.4 and 8.5 of ASTM D4541. If any test fails, a minimum of three (3) <br />additional locations in the section of the failure shall be tested, as directed by the City Engineer. <br />If any of the retests fail, all loosely adhered or unadhered liner in the failed area, as determined <br />by the City Engineer, shall be removed and replaced. If a structure fails the adhesion test, one <br />(1)additional structure or ten percent (10%) of the initial number of structures selected for <br />testing shall be tested at the discretion of the City Engineer. <br />NOTE: The mil thickness will be measured and confirmed with the scored and pulled test <br />samples. <br />4.) A final visual inspection shall be made by the City Engineer’s representative and <br />manufacturer's representative. Any deficiencies in the finished coating shall be marked and <br />repaired according to the procedures set forth herein by Applicator. <br />5.) The sanitary sewer system shall be put back into operational service as soon as the final <br />inspection has taken place. <br />4-4.3 LIFT STATION START-UP AND TESTING <br />Section under development. <br />4-4.4 CONCRETE TESTING <br />4-4.4 (a) STRUCTURAL CONCRETE <br />Air content test, slump test, and seven (7) day and twenty-eight (28) day compression cylinders <br />shall be provided for each twenty-five (25) cubic yards of concrete construction.