This is the largest oil refinery on the West Coast, right in the heart of Los Angeles. From the Chevron website:

"We've been a part of this community since 1911 when the main product produced was kerosene for lamps. In fact, the city of El Segundo (Spanish for "the Second") was named after the Refinery, then Standard Oil's second in California. Today, the El Segundo Refinery provides jobs for more than 1,000 people, covers approximately 1,000 acres, has more than 1,100 miles of pipelines, and is capable of refining nearly 270 thousand barrels of crude oil per day. Transportation fuels -- gasoline, jet and diesel -- are the primary products refined from the crude oil."

Interesting sidenote: Chevron paid for the construction of an artificial reef at an adjacent beach called Pratte's Reef. Unfortunately the reef has not resulted in quality waves for surf.