The Work for this Contract involves rehabilitation of the City of Pendleton's existing east secondary clarifier, including replacement of the existing center pier, sweeps, motor, baffles, and other structural and mechanical components; installation of new groundwater floor relief valves; and extension of the non-potable utility water piping, together with all other Work required to complete the Project as shown on the Drawings and specified herein. Work includes these areas: • Installation of two mechanical gates on the Effluent clarifier combiner box • Installation of two mechanical gates on the Return Activated Sludge (RAS) Station • Curb and asphalt replacement. The installation of these mechanical gates will require bypass pumping whenever one of the RAS station slide gates is being worked on. While the RAS is off line and being bypassed, the plant staff will perform some cleaning and annual maintenance on the RAS station. The installation of the effluent combiner box gates can be done with the installation of a 36-inch pig and a bypass option the plant staff have with the west secondary clarifier.
