Specifications include, but are not limited to: The PS-2 Bar Rack Replacement and Grit Collection System Improvements project intended to improve reliability and increase removal efficiencies of screening and grit at the GLWA Water Resource Recovery Facility (WRRF). Major scope of work elements include: 1) Screen equipment replacement with finer opening bar screens, 2) Installation of screenings conveyance and compacting equipment, 3) Expansion of the PS-2 Screen Building to include space for screenings handling and temporary material storage prior to hauling to landfill, 4) Replacement of aerated grit removal tanks with stirred vortex technology, 5) Construction of a new Grit Processing Facility to dewater and temporarily store grit material prior to hauling to landfill, 6) Channel aeration system.