Protective Coatings for Sanitary Sewer Structures, Savannah, GA

The purpose of these specifications is to describe requirements for labor, materials, and equipment required for protecting and/or rehabilitating the interior of concrete sanitary sewer structures by application of a coating to protect the concrete structure from hydrogen sulfide acid generated by microbiological sources present in a municipal wastewater environment. The protective coating shall also eliminate infiltration, repair voids, and enhance the structural integrity of sanitary sewer structures. The structures to be rehabilitated for this bid include force main discharge manholes, drop manholes, and lift station wet wells. The protective coating shall be a polymer-based polyurethane or a high-build, solvent-free epoxy coating. For lift station wet wells, the coating limits shall include from the bottom of fillet, wet well walls, and roof. The coating system shall overlap one inch (1”) to two inches (2”) where hatches sit on the roof but shall exclude wet well floor. For manholes, coating limits shall be included from the flow line in the trough of invert up to ring and top with one inch (1”) to two inches (2”) overlay on the ring. Procedures for surface preparation, cleaning, application, and testing are described in the bid documentation. This project has a DBE goal of 20%, 10% should bemet by a Local DBE. Insurance requirements.