Harbor/South Bay Water Recycling Project
In an effort to reduce the region’s dependence on imported water, West Basin has partnered with the U.S. Army Corps of Engineers to expand the use of recycled water through the Harbor/South Bay Water Recycling Project. Through this partnership, the Harbor/South Bay Project will greatly increase the amount of recycled water available in the South Bay area. The overall Project consists of multiple lateral and capital facility projects with nearly 60 miles of combined pipelines. The first two laterals, Victoria Lateral and the California State University Dominguez Hills Mainline Extension, were successfully completed in April 2003, followed by the Los Angeles Southwest College Lateral and the Madrona Lateral soon thereafter.
Once complete, the Harbor/South Bay Project will deliver more than 7 billion gallons of recycled water throughout the South Bay area. This type of project is vital to sustaining a reliable supply of water for Southern California, which imports most of its water from Northern California and the Colorado River. With these sources of water becoming increasingly limited, agencies such as West Basin are working to develop a plan to reduce dependency on imported water sources. Recycled water offers a viable solution. As more recycled water becomes available throughout Los Angeles County, it can be used for commercial, industrial and landscape-irrigation purposes, conserving the region’s potable water supply.
Ashwood Lateral, City of Inglewood
The construction for the Ashwood Park Recycled Water Lateral (“Ashwood Lateral”) was complete in late summer 2008 and the on-site retrofit to convert water service from potable to recycled water is scheduled for early 2009. When complete, the Ashwood Lateral will supply recycled water to Ashwood Park and CalTrans landscape areas. The Project consists of approximately 2,700 lineal feet of 4-inch diameter recycled water pipeline (purple pipes) and, by irrigating these two locations with recycled water, will conserve approximately 10 acre-feet of potable water a year.
Anza Avenue Recycled Water Lateral, City of Torrance
Anza Avenue Recycled Water Lateral has been designed in to two phases. The design for Anza Ave Lateral Phase I is completed and scheduled to start construction in early 2009. The total length for Anza Ave Lateral Phase I is estimated to be 14,500 lineal feet of 8-, 6-, and 4-inch diameter recycled water pipeline. Once the Anza Lateral pipeline is in place, the on-site retrofit will begin.
Phase V Expansion Project
El Segundo Power Plant
The El Segundo Power Plant, located in the City of El Segundo, California, currently receives potable water for their boiler feed application process. The Phase V Project would involve switching over to high quality recycled water: approximately 786,240 gallons per day (gpd) (0.78 MGD) of peak operational use and 524,160 gpd (0.52 MGD) average daily use of Single-Pass RO product water for boiler feed application.
The Chevron Nitrification Satellite Facility, located in the City of El Segundo, California, receives approximately 5 Million Gallons per Day (MGD) of Title 22 recycled water from the Edward C. Little Water Recycling Facility. The Title 22 recycled water is further treated through a nitrification process for industrial applications. As part of the Phase V Expansion, an additional 0.58 MGD of nitrified water demand is anticipated.
West Coast Basin Barrier
West Basin currently produces high-quality recycled water (Barrier Water) for injection into the West Coast Basin Seawater Barrier. The Barrier Water treatment consists of Microfiltration, Reverse Osmosis, and Ultra-Violet and advanced oxidation processes. The Barrier water is blended with imported potable water prior to injection into the West Coast Basin Barrier. West Basin is currently approved to inject recycled water at a blend of 75% recycled water to 25% imported potable water by the Los Angeles Regional Water Quality Control Board in consultation with the Department of Public Health (DPH). Once groundwater monitoring requirements have been completed and approved by the DPH, West Basin will be able to provide 100% recycled water for injection into the West Coast Basin Seawater Barrier. The Phase V Expansion includes addition of between 2.5 and 5.0 MGD capacity at the barrier. This additional amount of water will bring the total capacity of recycled water injection up to 17.5 MGD.
Dominguez Gap Barrier
The Carson Regional Water Recycling Treatment Facility (Carson Facility), located in the City of Carson, treats Title 22 recycled water from the Edward C. Little Water Recycling Facility through Microfiltration, Reverse Osmosis, and Nitrification treatment processes to provide high quality recycled water to a refinery user for boiler-feed and cooling tower applications. As part of the Phase V Expansion, the Carson Facility will potentially implement advanced oxidation processes (AOP) to provide up to 1 MGD of barrier water to the Dominguez Gap Barrier. Currently, the Dominguez Gap Barrier receives highly treated barrier water from the County of Los Angeles’ Terminal Island Treatment Facility. The Carson Facility currently treats approximately 3.5 MGD of high quality recycled water, which will potentially increase to approximately 4.5 MGD as part of the Phase V Expansion.
Feasibility Study: Carson Regional Water Recycling Expansion Project, City of Carson
West Basin is conducting a Feasibility Study to Expand the Carson Regional Water Recycling Facility (Carson Facility). Through this study, West Basin will examine the potential expansion of recycled water, treated by microfiltration (MF), reverse osmosis (RO), decarbonation, and nitrification at the Carson Facility. This recycled water could potentially be supplied to three customers: the bp refinery, Water Replenishment District for barrier water injection, and the City of Los Angeles for their Harbor Area recycled water uses. The Feasibility Study will determine the treatment requirements and improvements needed to expand production at the Carson Facility, determine pipeline routing and sizing requirements to supply recycled water to various customers, and develop detailed cost estimates for expansion and construction. Cost estimates will then be used by recycled water customers to evaluate their costs and develop budgetary estimates for completing the expansion.