WWTP Anaerobic Digester No. 1 Dual Membrane Cover Replacement

Removal and replacement of the existing dual membrane cover of anaerobic digester no. 1. The work also includes, but is not limited to, the removal and replacement of the following air system equipment for both of the dual membrane digester covers: 1) air supply fans no. 1, 2, and 3; 2) air pressure control valves no. 1 and 2; 3) air pressure gauges with isolation valves on discharge pipe of each fan and for each air pressure control valve.