The use of modified hydrofluoric acid at Southern California refineries won’t be phased out, but a regional regulator will instead look at ways to reduce risks of the hazardous chemical.
The South Coast Air Quality Management District began developing a proposed regulation, Rule 1410, in April 2017, spurred by community concerns about a February 2015 explosion at an Exxon Mobil Corp. refinery in Torrance that injured two workers. The explosion resulted in a 40-ton piece of debris landing within five feet of a vessel containing modified hydrofluoric acid. Federal investigators declared it a “near miss” catastrophic accident.
The acid is ...
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