Exxon Mobil Corp. released 100 pounds of hydrogen sulfide from its Beaumont refinery in Texas, according to a filing to the U.S. National Response Center.
The leak was caused by a crack in the coke drum, the report showed. It occurred at 12:50 a.m. local time yesterday.
U.S. refineries must notify the center if they release hazardous substances in excess of reportable quantities, according to the Comprehensive Environmental Response, Compensation and Liability Act, commonly known as Superfund.
Bloomberg News couldn’t immediately verify that the information in the NRC filing was accurate.
The refinery can process almost 360,000 barrels of crude a day, according to data compiled by Bloomberg.