Primary Digester No. 6 Rehabilitation

The Primary Digester No. 6 Rehabilitation project, managed by the Union Sanitary District, focuses on the restoration of existing infrastructure at the Alvarado Wastewater Treatment Plant located at 5072 Benson Road in Union City, California. The scope of work includes concrete repairs, coating rehabilitation, and the replacement of existing equipment and associated appurtenances. This project is designed to benefit the residents of Union City, Newark, and Fremont by maintaining essential sewerage services through minor alterations to existing public utility facilities. The project is classified under NAICS code 237990 and is currently listed as a forecast with a posted date of September 15, 2025. It has been declared categorically exempt under CEQA Section 15301(b) because it involves no expansion of existing use. Key administrative contacts include Assistant Engineer Derek Chiu and CIP Coach Curtis Bosick. The work will be performed within Alameda County, specifically at the Alvarado Wastewater Treatment Plant site.