The State of California Department of General Services is seeking bids for the replacement of two air handlers (AHU B4-1 and AHU B4-2) at the Department of Public Health in Richmond, Contra Costa County, CA. The project involves labor, materials, and services necessary for the replacement of the air handlers, including associated controls, mechanical piping, and evaluation and sealing of existing ductwork. The project requires a license of either A or B, and the estimated cost is $4,816,400.00. The project duration is 365 calendar days. Key aspects of the project include: • Replacement of air handlers AHU B4-1 and AHU B4-2 • Associated controls and mechanical piping • Evaluation and sealing of existing ductwork • Removal and re-insulation of existing ductwork wrap • Compliance with health and safety mandates • Payment and performance bonds required