Twin Oaks Valley Water Treatment Plant
San Marcos, California
The Twin Oaks Valley (TOV) Water Treatment Plant was a Design/Build/Operate project, north of the City of San Marcos, California, in San Diego County. The plant is one of the largest membrane filtration plants in the world, providing up to 100 million gallons per day of treated water. The plant is run on Wonderware Industrial Application Server (IAS), with Wonderware InTouch providing the operator interface. There were four separate control systems at start-up; one each for: a) membrane filtration; b) ozone generation; c) hypochlorite generation; and d) chemical feed, contactors, and solids handling. DLT&V programmed the control system for the chemical feed, contactors, and solids handling, while each of the other three autonomous systems were programmed by their individual equipment vendors. DLT&V also provided the integration for the four systems to function together. Following plant start-up, DLT&V was
charged with combining the four stand alone systems into a single application – without taking the plant offline. Any future modification or upgrade to low-level standard system components will be applied automatically to the entire plant control system and will eliminate the need for parallel programming efforts.
