Federal officials issued urgent new safety recommendations Wednesday for a Texas oil refinery where 21 tons of deadly acid were released this summer and said they are investigating the use of the chemical at refineries nationwide.
The head of the U.S. Chemical Safety Board said the inquiry continues into the July accident at Citgo's Corpus Christi refinery that seriously injured a worker, and accidents involving hydrofluoric acid in Illinois and Pennsylvania are also being investigated. In all, about a third of the nation's 150 refineries use hydrofluoric acid, or HF, in the process of making high-octane gas.'
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