The Sacramento Regional County Sanitation District (Regional San) is proceeding with a $1.5-billion to $2.1-billion plan to upgrade its wastewater treatment plant that serves about 1.4 million customers. On June 2, Regional San issued a request for proposals for construction management services for work valued at $127 million to perform site preparation beginning in Feb. 2015, and build a nitrifying sidestream treatment facility, disinfection chemical storage and RAS pumping system.
Carollo Engineers, Walnut Creek, Calif., is designing the RAS system, while site prep design was performed by Kennedy Jenks Consultants, Sacramento.