Biogas and Biosolids Evaluation: Digester 1 Cleaning

The City of San Mateo is seeking bids for the Biogas and Biosolids Evaluation: Digester 1 Cleaning Project. The project involves the cleaning of Digester 1, including the removal of all remaining liquid, grit, soil, rocks, scum, rags, hair, struvite, and other accumulated digester contents. The contractor will be responsible for mobilizing all equipment, vehicles, temporary piping, temporary power, lighting, and safety apparatus to the designated staging areas. The contractor will also be required to design, furnish, erect, and maintain all scaffolding required for interior access to perform blasting, coating, and repair work within Digester 1. • The project requires the contractor to be licensed by the State of California as a Class A Contractor. • The contractor will be responsible for washing all tank interior surfaces using high-pressure water cleaning equipment. • The contractor will be required to prepare the interior digester shell for inspection and condition assessment. • The contractor will be responsible for coordinating and providing access to the digester interior for a minimum of three full working-day Owner/Engineer structural and mechanical inspection upon completion of abrasive blast cleaning. • The project has an estimated construction cost of $1,100,000.