Shimmick is increasing the capacity of OCSD’s existing 100-mgd Advanced Water Treatment Facility by 30 mgd. Shimmick will expand the existing microfiltration (MF), reverse osmosis (RO), and ultraviolet (UV) light treatment processes, as well as install pumps, chemical storage tanks, chemical dosing pumps, blowers, de-carbonators, and electrical components. The work also includes the construction of conveyance facilities at the Orange County Sanitation District’s Plant No. 2, which includes a pump station and building, two prestressed concrete tanks, piping and valving, weir boxes and sluice gates.
Shimmick is also performing demolition, site clearing and preparation, and disposal of excavated materials; installation, assembly and connection of new treatment equipment; modification to existing concrete structures and construction of new concrete structures.
Shimmick is also self performing deep pile foundation, deep ground improvements, trenching, and hand excavation, as well as sheeting, shoring, and bracing. Additional work includes installation of a new pump station; prestressed concrete above ground storage tanks, and concrete metering and valve vaults; extension of existing and installation of new site and interior piping, valves, meters, vaults; lining and coatings; installation of new pipe supports; site restoration, paving, and grading; site security and traffic control.
Electrical work includes modifying existing and installing new conduit; wiring; and power and control systems; and integration and upgrade of the plant control system.