Los Angeles Department of Water and Power Seawater Desalination Update by: Alvin Bautista, P.E. October 2007

MWD has included desalination in its Integrated Resources Plan - $250/AF incentive offered LADWP began evaluations in 2002 (Fatal Flaw Analysis, Optimization Study, Brine Discharge Analysis, incl. use of Hyperion outfall) Due diligence requires a site-specific evaluation through detailed pilot testing at the Scattergood site Water System is conducting a small-scale pilot project at Scattergood to evaluate various parameters Seawater Desalination Update

Pilot project focus is on data and information collection (to provide answers that can serve as basis for future decisions) Grant funding from the Bureau of Reclamation and Department of Water Resources (Proposition 50) acquired to fund approx. 50% of the pilot project’s costs Pilot will be conducted in a manner that will not solely depend on power plant remaining in service Seawater Desalination Update

LADWP Proposed Desalination Project Site

85% of Los Angeles’ water supply is imported 40% of Los Angeles Aqueduct water has been redirected for environmental restoration City population expected to increase by 370,000 to over 4.3 million residents by 2025 Continuous efforts in recycled water supply development LADWP success in water conservation has kept demands low and imported supplies sustainable Seawater Desalination and City of Los Angeles’ Water Resources

85 percent of Los Angeles’ water supply is imported FY

Seawater Desalination and City of Los Angeles’ Water Resources 40% of Los Angeles Aqueduct water has been committed for environmental restoration 184,000 AF reduction = 40% of historic supply

CONSERVATION’S IMPACT ON CITY OF LOS ANGELES WATER USE Water use is the same today as it was 25 years ago despite an increase in population of nearly 1 million people.

Seawater Desalination Opportunities Work cooperatively - regional and statewide to develop a new local resource Develop an objective process for permitting future local facilities Provide water supply reliability through a drought-proof supply Improve technology through more R&D: gain efficiency and reduce cost

LADWP is evaluating desalination as a potential water resource to provide reliability and partly compensate for supplies reallocated to the environment The pilot research project at Scattergood will provide needed data and information that can be used to make future informed decisions The pilot project will evaluate the most feasible options for developing desalination Summary

Beyond the pilot research study, no decision has been made on the future of seawater desalination for Los Angeles LADWP is now undertaking prudent research and has initiated dialogue with stakeholders Thank you. Summary