Chevron reports recent El Segundo ammonia release

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NEW YORK, July 8 (Reuters) - Chevron Corp (CVX.N) reported a release of ammonia over a recent 11-day period at its 279,000-barrel-per-day Los Angeles-area refinery in El Segundo, California, according to a notice filed with state regulators.

The filing with the California Emergency Management Agency cited a "release of ammonia from a Cogen Ox Boiler due to unknown causes at this time. Caller states the release occurred on 6/22/09 at an unknown exact time and ended on 7/2/09 also at an unknown time."

The total amount of material involved in the release was about 220 pounds per day, added the Tuesday evening filing.

A company representative was not immediately available to discuss refinery operations. (Reporting by Haitham Haddadin; Editing by John Picinich)