Recycled Water Planning & Design Projects

SBSA – First Step Recycled Water Project
WBA provides overall program management services for the First Step Recycled Water Project, the first phase of the recycled water program within the South Bayside System Authority (SBSA) service area. The First Step Recycled Water Project delivers tertiary treated wastewater from the SBSA wastewater treatment plant to landscape irrigation customers in Redwood City. Currently a total of 11 landscape irrigation sites, 9 publicly-owned and 2 privately-owned, receive recycled water. As program manager, WBA was responsible for putting all the pieces together to implement this project. Examples of specific activities included identifying necessary tasks and a developing a plan to complete them, preparing necessary regulatory documents for approval from the Department of Health Services and the Regional Water Quality Control Board, communicating with the regulatory agencies, planning for and attending public meetings, developing consultant contracts, and working with the users to develop recycled water standards. WBA will also be the program manager for the subsequent phases of the recycled water program as it expands.

DSRSD – Clean Water Revival Project
WBA evaluated the feasibility and facilities needed to dispose of up to 2.5 million gallons per day of recycled water by groundwater injection for DSRSD. It was recognized by the District that the groundwater basin was actively used as a potable water supply and that advanced treatment with reverse osmosis (RO) would be required. To that end, the District had commissioned a study of the technology which WBA used as the basis for the process requirement for the project. WBA evaluated alternative locations for siting the RO facilities, alternative injection well locations and pipe routings. The facilities study became the technical basis for the Environmental Impact Report.

Carmel Area Wastewater District – Pebble Beach Irrigation Project
WBA is providing project management and advisory services to the Carmel Area Wastewater District to implement the project to delivery demineralized recycled water to the Pebble Beach golf course. The project has been initiated due to the Pebble Beach Company’s goal to ensure that they have a reliable source of water for golf course irrigation. Because of the sensitivity of the greens, the recycled water needs to be demineralized so that it contains the ideal sodium concentration. The project is currently in the predesign phase, and WBA is overseeing the work of consultants to evaluate the feasibility of using reverse osmosis and UV disinfection treatment facilities to meet the necessary water quality parameters.

Bay Area Regional Water Recycling Program – Master Plan
The project initially known as the Central California Regional Water Recycling Project was renamed the Bay Area Regional Water Recycling Program (BARWRP) to emphasize the shift in focus to the Bay Area. WBA analyzed the public policy issues related to the use of recycled water. Recognizing that public policy issues could be either a stimulus or a hindrance to water reuse, the program identified the issues and, in cases where public policy hindered a project, developed strategies for overcoming the issues. WBA also subcontracted with another engineering firm to perform a market assessment and to develop alternatives for recycled water use. With the mission statement of maximizing water reuse in the Bay Area, all potential markets for recycled water were reviewed, with no regard to political boundaries.

SKF – Recycled Water Feasibility Study
WBA completed a study for the Selma-Kingsburg-Fowler Sanitation District (SKF) that analyzed whether the District can feasibly deliver recycled water in the general vicinity of its wastewater treatment plant. The analysis determined the available recycled water supply and estimated the recycled water demand. The estimated recycled water demand was based on an analysis of the potential customers and their crops. The analysis included an assessment of the challenges to be overcome to implement a recycled water program. These include customer perception, political acceptance, water quality, and project cost. Finally, the study included an assessment of the feasibility of the potential alternatives to deliver recycled water.

City of Mountain View – Shoreline Pump Station
The City of Mountain View retained WBA to expand and upgrade its existing irrigation pump station located at the City's Shoreline Park. The original pumping facilities were unable to meet current and future irrigation demands and the filtration equipment was obsolete and unreliable. WBA estimated the future irrigation needs based on the City's Master Plan for the park, golf course and the surrounding area. The recommended upgrade program included a phased expansion of the pumping facilities and replacement of the filtration equipment with self-cleaning strainers. Plans and specifications were prepared for the recommended first phase project.

The Phase 1 project added a new 200-hp vertical turbine pump with a variable frequency drive. Two existing 100-hp were relocated and connected to the new, larger discharge piping. Variable frequency drives were also provided for the relocated pumps. Two self-cleaning strainers were provided to replace the obsolete filtration equipment. These units, sized for 3,000 gpm each, were specified to remove solids from the irrigation water (a combination of recycled water and city water from holding ponds located in the park) to one-forth the smallest orifice size in the irrigation system. The existing building was modified to house the new equipment and a new SCADA system. The Phase 1 facilities were designed to be compatible with future phases when the existing 100-hp pumps will be replaced with larger 200-hp units.

The above projects are representative of our experience in this area.
If you would like additional information on these, or other projects that
we have completed, please contact us.