Specifications include, but are not limited to: Replacement of bar screen at headworks; replacement of existing aeration and mixing equipment in the Orbal basin, including modifications to structure; replacement of secondary clarifier mechanisms and walkways; replacement of sludge pumps and piping including modifications to existing pump room; modifications to aerobic digester, including mixer replacement; addition of diffuser assemblies at SBR system; rehabilitation of existing piping; and electrical and SCADA upgrades. In addition, work shall include demolition and removal of existing equipment, any electrical and mechanical services, conduit, wiring, equipment and fixtures, connection to existing piping and structures, providing temporary generator power as needed, and all other incidental items as required to complete the work