The project consists of demolition of existing digester gas piping, valves, gas safety equipment, hvac ducts and air handler units. Installation of new digester gas piping, valves, digester gas equipment, control, and safety devices. Installing (2) two new digester gas foam separators, associated water supply piping, drain piping, power and controls. Installation of new 3-ton monorail track, (2) two manual track switches, electric hoist and trolley, manual hoist and trolley, structural steel supports, and exterior monorail support structure and installation of digester gas cover pressure and vacuum safety devices for the two primary digesters and secondary digester gasholder covers.