Friday, May 15, 2009

the first large-scale desalination operation on the West Coast and the largest in the hemisphere

TO BE NOTED: From the NY Times:

"
In California, Desalination of Seawater as a Test Case

SAN FRANCISCO — The vast $320 million desalination plant approved this week by San Diego’s regional water authorities is likely to serve as a test case for whether such a large project can meet its goals while safeguarding its Pacific environment.

The plant, to be built near Carlsbad, north of San Diego, will be the first large-scale desalination operation on the West Coast and the largest in the hemisphere. “If they build it well and it operates well and the price is right, we will see more,” said Peter Gleick, the cofounder and president of the Pacific Institute in Oakland, Calif.

“I think there’s going to be some hesitancy to really expand desalination until this plant is up and running,” he added. “There’s going to be hesitancy on the part of everyone — regulators, water agencies and municipalities.”

Other ambitious desalination projects are being considered along the California coast, from Marin County just north of San Francisco to Santa Cruz, Monterey, Long Beach and Huntington Beach. Cities, water companies and environmentalists are likely to scrutinize how the plant near Carlsbad performs financially and technically and weigh its environmental impact.

Environmentalists have battled the project in lawsuits, raising concerns about the amount of fish that will be killed by the pumping process and about potential change to the aquatic ecosystem when leftover brine is returned to the sea. So far they have not won any victories.

Poseidon Resources pursued the project for over six years before gaining final approval on Wednesday from the San Diego Regional Water Quality Control Board, the last of four agencies whose assent was needed.

The plant will filter 100 million gallons of seawater daily, taking salt out by filtering it through fine membranes, a process called reverse osmosis. If construction proceeds as scheduled, it will produce 50 million gallons of drinking water by 2011.

The plant would provide water to nine municipal water agencies in northern San Diego County, filling 10 percent of the county’s drinking water needs. Its capacity makes it one of the biggest outside the Middle East.

The California Coastal Commission, one of the agencies that approved the project, raised questions last month about whether Poseidon’s plan to mitigate the damage to aquatic life was sufficient. Poseidon plans to create 55 acres of new coastal wetlands to mitigate the loss of fish. The Coastal Commission suggested that a minimum of 66 acres was required, but the regional water board signed off on the original plan.

Marco A. Gonzalez, a lawyer for the Surfrider Foundation and the Planning and Conservation League, said he would appeal the regional board’s decision to the state board."

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