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Care shall be exercised not to damage adjacent work during sandblasting operations. <br /> Stainless steel need not be sandblasted. Blasted surfaces shall be coated within 4 hours <br /> of being sandblasted. All dust shall be removed from the surfaces prior to painting. <br /> F. Film Thickness and Continuity <br /> Coating system thickness is the total thickness of primer and finish coats and does not <br /> include passivators or sealers. <br /> The surface area covered per gallon of paint for various types of surfaces shall not <br /> exceed those recommended by the manufacturer. The first coat (prime coat) on metal <br /> surfaces refers to the first full paint coat and not to conditioning, tie coats, sealers or <br /> other pretreatment applications. Coatings shall be applied to the thickness specified, and <br /> in accordance with these specifications. Unless otherwise specified, the average total <br /> thickness (dry) of any completed protective coating system on exposed metal surfaces <br /> shall be not less than 1.25 mils per coat, and the minimum thickness at any point shall <br /> not deviate more than 25 percent from the required average. Unless otherwise specified, <br /> no less than two coats shall be applied. <br /> In testing for continJity of coating about welds, projections (such as bolts and nuts), and <br /> crevices, the Engineer will determine the minimum conductivity for smooth areas of like <br /> coating where the dry mil thickness has been accepted. This conductivity shall then be <br /> taken as the minimum required for those rough or irregular areas. Pinholes and holidays <br /> shall be repainted to the required coverage. <br /> G. Special Requirements <br /> Hangers and supports shall be coated, except for the final coat, prior to the installation. <br /> Except for those to be filled with grout, the underside of ungalvanized equipment bases <br /> and supports shall be coated with at least two coats of primer specified for system A <br /> prior to setting the equipment in place. Bolts and bolt holes in flanges (such as those <br /> used with couplings or wafer type valves where holes and bolts as finally installed will be <br /> exposed to weather or moisture) shall be coated prior to assembly to prevent rusting of <br /> the unprotected metals. <br /> H. Cleanup <br /> Upon completion of coating, the Contractor shall remove surplus materials, protective coverings, <br /> and accumulated rubbish, and thoroughly clean all surfaces and repair any overspray or other <br /> paint related damage. <br /> 3.04 SPARE SUPPLIES <br /> Provide one unbroken gallon container of each color and type of paint and each type of solvent <br /> and thinner required by the specifications. <br /> 3.05 COATING SYSTEMS <br /> The coating systems used for different types of surfaces are listed below and followed by <br /> specification for each: <br /> July 2007 <br /> Division III-108 NEI Phase II Water and Sewer <br /> CIP Nos. 7468, 7589, 7590 <br />