Specifications include, but are not limited to: The Work includes removing the floating steel cover from Primary Digester No. 4, removing the existing protective coating on the underside of the steel cover, and on the exterior of the side sheets, and preparing the surface for new coating, removing and replacing corroded ballast supports per original manufacturer’s requirements, and as directed by the Owner and Engineer, re-coating the floating steel cover, and re-installing the floating steel cover onto the digester tank. The Work also includes cleaning, surface preparation and re-coating the platform walkway and bridge, scum skimmer mechanism, beach, and piping, clarifier center column, energy dissipating inlet tube, inlet box, center cage support and torque tube, and sludge scraper mechanism and support truss for Primary Clarifiers 2 and 3. The Work also includes re-balancing the sludge scraper mechanism against the concrete clarifier floor, and replacing failed pressure relief valve(s) on clarifier floor .
