Parsons selected for California water-reuse expansion

California’s West Basin Water District has awarded its largest ever water-reuse contract to Pasadena-based Parsons Corporation on a design-build basis.

The district’s Edward C Little Water Recycling Facility (ECLWRF) in El Segundo, known as the only facility in the world that produces five different types of recycled wastewater*, will be undergoing its fourth expansion since its original construction in 1995 from 30 MGD (113,500 m³/d) to 46 MGD (174,000 m³/d).

Under the plant’s US$ 60.6 million Phase V expansion, water purification facilities (microfiltration, reverse osmosis and ultraviolet advanced-oxidation process facilities) will be expanded to produce an additional 5 MGD (18,900 m³/d) of water supplied to the seawater barrier to prevent seawater intrusion and refill groundwater supplies. A single-pass reverse-osmosis membrane water purification system at the Chevron facility will also be expanded to bring an additional 500,000 GPD (1,890 m³/d) to NRG’s El Segundo Power Plant.

Other Phase V work includes an ozone pre-treatment facility, irrigation water facilities (Title-22 high rate clarification unit), and various solids handling facilities will be added to the ECLWRF to improve water quality and efficiencies at the plant.

“Parsons was selected by the West Basin Board of Directors due to its extensive water and wastewater treatment experience and design-build experience,” said West Basin Board resident Ronald C Smith. “Parsons has committed to conducting extensive local outreach to hire from within West Basin’s service area, focusing on small and minority owned businesses and union labor. They have also committed to ‘no change orders’ and an accelerated schedule which could save West Basin time and money and bring additional recycled water online sooner to meet our customers’ needs,”

*The five water types produced at the ECLWRF are:

  • Tertiary Water (Title 22): for a wide variety of industrial and irrigation uses;
  • Nitrified Water: for industrial cooling towers;
  • Softened Reverse Osmosis Water: Secondary treated wastewater purified by microfiltration, followed by reverse osmosis and disinfection for groundwater recharge;
  • Pure Reverse Osmosis Water: for refinery low-pressure boiler feed water;
  • Ultra-Pure Reverse Osmosis Water: for refinery high-pressure boiler feed water
  • .