A fire at the Delaware City Refinery broke out at noon yesterday taking fire crews nearly five hours before the blaze was under control.
The Wilmington News Journal reports that one firefighter was treated for an unrelated medical problem.
Jamie Bethard with the Department of Natural Resources and Environmental Control said that his agency would be trying to understand how the blaze began.
State Senator Nicole Poore issued a statement saying that there were no environmental issues in the area.
DNREC said that it is monitoring the air quality at the facility and surrounding area.