No one was injured when a cutting torch ignited an oil pit at McLouth Steel at about 3:30 p.m. Jan. 24.
Crews were cutting metal into scrap in a building on the north side of the former steel plant when a waste oil pit became engulfed in flames.
Firefighters from Trenton and Riverview responded to the call and extinguished the flames using foam.
Trenton Fire Marshal Jeff Evans said firefighters shot foam onto the fire to suffocate the flames.
"The foam seals the surface and keeps oxygen from getting to the fire," Evans said.
Evans said there are several waste oil pits scattered around the plant. The pits are purposefully placed in the ground to store used oil until it can be disposed of properly.
"The EPA (Environmental Protection Agency) is well aware of everything that is going on there."