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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 20 of 24 <br />(Fahrenheit) Maximum Time Between Coats <br />(Hours) <br />50 to 60 36 <br />60 to 70 24 <br />70 to 80 12 <br />80 to 120 4 <br />3. Apply additional coats required to obtain specified thickness. <br />4. When previous coat has cured or set or Maximum Time Between Coats has <br />lapsed, abrasive blast previous coat until surface film is removed. Wash and <br />clean surface with cleaning solvent. Apply succeeding coat within Maximum <br />Time Between Coats or as recommended by coating manufacturer, <br />whichever is sooner. <br />5. When succeeding coat is applied over previous coat which has cured or set <br />or Maximum Time Between Coats has lapsed, and surface has not been <br />abrasive blasted, remove entire coating system to substrate, and apply new <br />coating system. <br />6. Where coating system is applied to exterior concrete surfaces below grade, <br />extend system at least 3 inches above finish grade in straight level. Step <br />extended system down 3 inches when extended system reaches 6 inches <br />above finish grade. <br /> <br />3.12 ELASTOMERIC POLYURETHANE (100 PERCENT SOLIDS) <br /> <br />A. Preparation: <br />1. Prepare surfaces in strict accordance with coating manufacturer's instructions <br />and as directed and approved by coating manufacturer's representative. <br />B. Application: <br />1. Apply epoxy primer at DFT of 1 to 2 mils, in strict accordance with <br />manufacturer's instructions. <br />2. Apply polyurethane coating at minimum total DFT as follows: <br />a. Steel: 60 mils DFT. <br />b. Ductile iron and ductile iron pipe coating and lining: 30 mils DFT. <br />c. Concrete: 120 mils DFT. <br />d. Or as recommended by the coating manufacturer and accepted by the <br />ENGINEER. <br />3. For concrete application, provide saw cutting for coating terminations in strict <br />accordance with manufacturer's instructions: <br />a. For application to damaged concrete, refer to Section 03925. <br />4. For applications requiring expanded films, CONTRACTOR must be licensed <br />for the use of the expansion technology, to include trained personnel, and <br />have the equipment capabilities to apply the expanded 100 percent Solids <br />Elastomeric Polyurethane material using the manufacturer’s specified <br />technology. <br />5. Coating shall be 100 percent electronically tested using high voltage in <br />accordance with NACE procedure SPO188-06 inspected for discontinuities to <br />include pinholes, voids, and mechanically damaged areas. <br />DocuSign Envelope ID: BCD58F18-CC63-40CC-B673-999B5DE97062