PBFA Energy

PBF Energy

DELAWARE CITY, Del. (AP) - Officials say a Delaware City Refinery unit is using backup pollution control after a malfunction that sent a dark plume of smoke billowing from a stack at the plant.

A Department of Natural Resources and Environmental Control alert says the problem at PBF Energy's refinery began early Tuesday and involves an energy-recovery and pollution-control system linked to a coker, which controls emissions.