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<br />Non-Professional Services Agreement between July 19, 2021 <br />City of San Leandro and Redwood Painting Company, Inc. Exhibit A Page 13 of 24 <br />6. All abrasive blast cleaned surfaces shall be blown down with clean dry air and <br />or vacuumed. <br /> <br />F. Ferrous metal surfaces not to be submerged: Abrasive blast in accordance with <br />SSPC SP-10, unless blasting may damage adjacent surfaces, prohibited or <br />specified otherwise. Where not possible to abrasive blast, power tool clean <br />surfaces in accordance with SSPC SP-3. Blast to near white and convert any <br />areas pitted from rust. <br /> <br />G. Ferrous metal surfaces to be submerged: Unless specified otherwise, abrasive <br />blast in accordance with SSPC SP-5 to clean and provide roughened surface <br />profile of not less than 2 mils and not more than 4 mils in depth when measured <br />with Elcometer 123, or as recommended by the coating manufacturer. Blast to <br />near white and convert any areas pitted from rust. <br /> <br />H. Ductile iron pipe and fittings to be lined or coated: Abrasive blast clean in <br />accordance with NAPF 500-03. <br /> <br />I. Sherardized, aluminum, copper, and bronze surfaces: Prepare in accordance <br />with coating manufacturer's instructions. <br /> <br />J. Galvanized surface: <br />1. Degrease or solvent clean (SSPC SP-1) to remove oily residue. <br />2. Power tool or hand tool clean or whip abrasive blast. <br />3. Test surface for contaminants using copper sulfate solution. <br />4. Apply metal pretreatment within 24 hours before coating galvanized surfaces <br />that cannot be thoroughly abraded physically, such as bolts, nuts, or <br />preformed channels. <br /> <br />K. Shop primed metal: <br />1. Certify that primers applied to metal surfaces in the shop are compatible with <br />coatings to be applied over such primers in the field. <br />2. Remove shop primer from metal to be submerged by abrasive blasting in <br />accordance with SSPC SP-10, unless greater degree of surface preparation <br />is required by coating manufacturer’s representative. <br />3. Correct abraded, scratched or otherwise damaged areas of prime coat by <br />sanding or abrasive blasting to bare metal in accordance with SSPC SP-2, <br />SP-3, or SP-6, as directed by the ENGINEER. <br />4. When entire shop priming fails or has weathered excessively (more than 25 <br />percent of the item), or when recommended by coating manufacturer’s <br />representative, abrasive blast shop prime coat to remove entire coat and <br />prepare surface in accordance with SSPC SP-10. <br />5. When incorrect prime coat is applied, remove incorrect prime coat by <br />abrasive blasting in accordance with SSPC SP-10. <br />DocuSign Envelope ID: BCD58F18-CC63-40CC-B673-999B5DE97062