Media Contact: Gil Alexander, (626) 302-2255

SAN CLEMENTE, Calif., Oct. 19, 2009 — The annual test of the Community Alert Siren System will be conducted Wednesday morning, Oct. 21, 2009, by Southern California Edison (SCE) and the cities of Dana Point, San Clemente, San Juan Capistrano, Orange County, the California Department of Parks and Recreation and Marine Corps Base, Camp Pendleton.

Between 10 a.m. and noon, 52 sirens located in the communities around the San Onofre Nuclear Generating Station will be activated several times for approximately three minutes each time. The sirens sound a continuous steady tone distinguishing them from those used by fire and police departments.

This community alert system would be used by local government officials in the unlikely event of a nuclear emergency requiring public action to notify the public to turn on radio and TV stations for public safety announcements. The sirens also could be used by local government officials to inform residents of a non-nuclear emergency.

Flyers and other educational materials explaining the test have been distributed to residents, businesses, and schools in the area. Before and during the siren test, broadcasts on Orange County’s primary Emergency Alert System radio station, KWVE 107.9, will inform the public of the test. 

Additional emergency response information can be found on SCE’s Web site,, and in the ATT Telephone Directory Customer Guide White Pages of South Orange County and North San Diego County, Coastal.

SCE Nuclear Power Facts

  • The San Onofre Nuclear Generating Station is Southern California’s largest source of reliable, emission-free “baseload” power, electricity that is available 24/7 regardless of weather conditions.
  • The San Onofre facility generates approximately 2,200 megawatts of electricity, enough power to serve 1.4 million average homes at a point in time.
  • The plant’s “once through” ocean water cooling system includes an advanced set of marine protection technologies that prevent harm to 94 percent of adult fish and mitigation projects that restore more than the fish and larvae affected.
  • The plant is jointly owned by SCE (78.21 percent), San Diego Gas & Electric (20 percent) and the city of Riverside (1.79 percent).

About Southern California Edison
An Edison International (NYSE:EIX) company, Southern California Edison is one of the nation’s largest electric utilities, serving a population of nearly 14 million via 4.9 million customer accounts in a 50,000-square-mile service area within Central, Coastal and Southern California.


San Onofre Nuclear Generating Station and Community Emergency Planning Partners to Test Siren System