A high pressure line routed to a flare near the area where hydrochloric acid ends up used in the refining process was where a fire broke out at a Torrance, CA, oil refinery Tuesday.
The cause of the fire remains under investigation, officials said.
The refinery’s on-site fire crew began dousing the flames shortly after 4 p.m.
Crews from the Torrance Fire Department arrived later to assist in the firefight.
The flames began to subside at around 4:45 p.m. The fire appeared to be out shortly after 5 p.m.
Last year, an explosion at the facility forced its closure. The facility reopened in May.
The cause of Tuesday’s fire was not immediately known.
The city of Torrance said in a statement some employees suffered injuries injured and ended up evaluated at the scene, but did not go to the hospital.
The 750-acre refinery was previously owned by ExxonMobil but was sold to New Jersey oil refining concern PBF Energy last year for $527.5 million.
The Torrance Fire Department said the 10-inch flare pipe that burned is “outside the boundary of the alkylation unit,” an area where modified hydrofluoric acid, a highly hazardous chemical, is used. Though that unit was not affected, refinery personnel shut it down when the fire broke out, fire officials said.