Investigators are working to determine the cause of a toxic gas leak at an industrial plant near Pensacola that killed one worker and injured another.
Emergency crews say hydrogen sulfide was released inside a section of the Blackjack Creek Treating Facility in Allentown, about 20 miles northeast of Pensacola.
The toxic chemical is created in the process of making crude oil.
Fire officials say the leak did not affect anything outside the plant or its boundaries.
The injured worker was treated and released.
The plant was closed by the Florida Department of Environmental Protection in 2002 while extensive repairs were made to reduce sulfur dioxide and possible hydrogen sulfide emissions.
The company paid $125,000 in civil penalties and completed a pollution prevention project instead of the balance of the penalties, according to a consent order.
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