American Contracting & Environmental Services, Inc. (ACE) is bidding Contract No. 1 - General Construction only for the North Tonawanda WWTP Solids Handling Improvements Project. The General Construction scope includes rehabilitation of Primary Digester Tank No. 2 and the primary digester sludge pump room; digester gas collection and piping modifications; installation of a new dual-fuel boiler, digested sludge heat exchanger, waste digester gas flare, safety equipment, yard piping, demolition, and site improvements. ACE is not bidding Contract No. 2 - HVAC or Contract No. 3 - Electrical.