Return Activated Sludge (RAS) Pumping

The Return Activated Sludge (RAS) Pumping project involves the construction of a new RAS system at the Sacramento Regional Wastewater Treatment Plant (SRWTP). The project includes the replacement of existing RAS pumps, piping, valves, and other equipment, as well as the construction of new pump pads and the rehabilitation of existing mixed liquor channels. The project requires a general engineering contractor with a class A license, and prequalification is required for electrical and instrumentation & control subcontractors. The engineer's estimated construction cost is $30,342,000. • The project involves the replacement of 48 existing RAS pumps with new vertical turbine solids handling pumps. • The project includes the replacement of RAS pump discharge piping, valves, flow meters, and ancillary items. • The project requires the construction of new reinforced concrete pump pads. • The project involves the replacement of coarse bubble diffuser manifolds with new coarse bubble diffuser grids in existing mixed liquor channels. • The project requires the rehabilitation of existing mixed liquor channels.