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2. Limit drying time to that required by these Specifications or coating <br />manufacturer's instructions. <br />3. Do not allow excessive drying time or exposure which may impair bond <br />between coats. <br />4. Recoat epoxies within time limits recommended by manufacturer. <br />5. When time limits are exceeded, abrasive blast coat prior to applying <br />another coat. <br />6. When limitations on time between abrasive blasting and coating cannot <br />be met before attachment of components to surfaces which cannot be <br />abrasive blasted, coat components before attachment. <br />7. Ensure primer and intermediate coats of coating are unscarred and <br />completely integral at time of application of each succeeding coat. <br />8. Touch up suction spots between coats and apply additional coats where <br />required to produce finished surface of solid, even color, free of defects. <br />9. Leave no holidays. Perform low voltage wet sponge testing of all interior <br />wet areas below the High Water Level (HWL) to ensure the coating in <br />this area meets NACE Condition "A" Pinhole Free. The applied coating <br />film below the HWL shall be continuous. <br />10. Sand and recoat scratched, contaminated, or otherwise damaged coating <br />surfaces so damages are invisible to naked eye. <br />Apply minimum number of specified coats. Each coat shall be applied at the <br />specified rate and in the manner recommended by the coating manufacturer and <br />it shall be well worked into the surface to which applied. No laps or brush shall <br />show and primer shall be applied to produce as uniform a coating thickness and <br />complete coverage as is possible. Exterior primer coatings applied by brush and <br />roller shall be inspected and approved by the Owner's representative, Engineer, <br />or inspector within 24-hours after application to ensure a holiday free coat of <br />primer. The film thickness of the coatings will be measured and any readings <br />below the specified film thickness, or holidays shall be corrected by applying an <br />additional coat(s). Where thinning is necessary, only the products of the <br />manufacturer furnishing the coating, and for that particular purpose, shall be <br />allowed. All thinning shall be done strictly in accordance with the manufacturer's <br />instructions, as well as with the full knowledge and approval of the Engineer. Dry <br />film thickness will be measured by means of the "Mikrotest" gage manufactured <br />by the Nordstrom Corporation of Amherst, Ohio or equivalent; and <br />measurements of wet mil thickness' will be accomplished by use of the <br />"Nordson" wet film gage or such other gage as the Engineer might determine as <br />being satisfactory. <br />M. Apply coats to thicknesses specified, especially at edges and corners. Apply <br />additional coats when necessary to achieve specified thicknesses. <br />N. Apply coatings to be free of film characteristics or defects that would adversely <br />affect performance or appearance of coating systems. Coat surfaces without <br />drops, ridges, waves, holiday, laps, or brush marks. <br />O. Care shall be given to ensure one additional and uniform stripe coat of primer or <br />intermediate coat is carefully applied by brushing around rivet heads, weld <br />seams, scab marks, plate overlap, joints, and other irregularities in the surface. <br />Each coat shall be allowed to dry and/or cure thoroughly before either the next <br />coat is applied or the tank is placed into service as required by the coating <br />P05367-2016-000 / Mounds View 09 96 20 - 12 PRESSURE VESSEL COATING <br />2019 WTP Rehabilitation SYSTEMS <br />