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20.04 INTERIOR PAINT SYSTEMS <br />The work covered by this section of the specification includes painting the entire inside <br />area of the tank. It shall also include painting any steel inside the tank such as roof <br />supports, ladders, safety grates, and all other items inside the tank. <br />The Contractor shall furnish all materials required for the painting and shall install <br />them in accordance with these specifications. <br />Interior coating shall be a three coat system of zinc rich primer/ epoxy/ epoxy with the <br />thickness as prescribed and approved by the Engineer. All bolted seams and weld <br />seams will be brush coated with a mixture of 50% epoxy, 50% thinner after prime coat <br />and prior to second coat. <br />20.05 EXTERIOR PAINTING <br />The work covered by this section of the specification includes painting the entire <br />outside surface area of the tank including all appurtenances such as ladders, handrails, <br />vents, piping, hatches and manways. Safety climb devices, galvanized and stainless <br />steel hardware and all data plates shall not be coated unless otherwise specified. <br />The Contractor shall furnish all materials required for the painting and shall apply <br />them in accordance with the manufacturer's instructions and approved by the <br />Engineer. <br />The exterior coating shall be a four coat system of zinc-rich <br />primer/ epoxy/ polyurethane/fluoropolymer as set forth in the Summary of Work in <br />the Technical Specifications. The thickness of application will be as specified and <br />approved by the Engineer. <br />The CONTRACTOR shall take all the necessary precautions to minimize "over spray" <br />or damage to surrounding property. This may include the use of shrouding or not <br />working when the winds are blowing. An alternate means would be rolling or <br />brushing in lieu of spraying, with the approval of the ENGINEER. Should the <br />CONTRACTOR determine that an over spray has occurred, immediate action shall be <br />undertaken to remove the paint before it has time to set. Normally if epoxy and <br />polyurethane are not cleaned in less than 48 hours, the paint will develop a set that will <br />preclude effective removal. Upon starting the work, the CONTRACTOR will provide <br />data as to his method of over spray removal, should an over spray occur. This may be <br />accomplished by either in-house forces or by a commercial cleaning company. <br />Ts2o-4, 459 <br />