At 315 million gallons per day (MGD) capacity, the San José-Santa Clara Regional Wastewater Facility was one of the country’s largest tertiary treatment plants when it was constructed in 1976-1979. A few years later, the community’s growth created a problem: it needed a 143 MGD capacity expansion.


Sundt’s remedy involved a number of homemade solutions. We brought fiberglass manufacturing technology to the project, designing a specialized Chlorine Contact Chamber serpentine concrete wall forming system in lieu of renting a more conventional forming system. The innovation brought significant cost savings to the project.


Inspired by an idea they saw in a magazine, the team also designed and constructed an injection pump to place the garnet, sand and coal in the final filters for the plant. Our expertise, ingenuity and love of developing elegant solutions to complex challenges again saved a significant amount of time and money for the plant’s owner – and ultimately for its millions of end users.


City of San José


San José-Santa Clara Regional Wastewater Facility