Risk plan for Philly refinery shows a hydrogen fluoride release could have been disastrous. Some say the toxic chemical is too dangerous to keep using
The explosion at Philadelphia Energy Solutions raises questions about a substance — which is also used at two nearby plants — that is so toxic, a vapor cloud of it could travel for miles and cause blindness, serious burns, permanent injuries or death.
The explosion and fire took a day and a half to extinguish and destroyed the unit that turned crude oil into gasoline. Four employees were hurt.