The fire, which is suspected to have flared up around 9:00 a.m. on Saturday, has since been contained, according to the city of Gilbert, whose fire department worked to extinguish the flames.
Crews on scene at a #GilbertAZ Biodiesel manufacturing plant. Fire has been extinguished and the situation has been contained.— Gilbert Fire Rescue (@GilbertFireDept) November 16, 2013
Gilbert Fire division chief Brian Ruffentine told KTAR that the fluid in the tank was methol alcohol, which is not dangerous though highly flammable.
"It appears a forklift operator accidentally pierced a 300-gallon tank of a product called methol alcohol," Ruffentine explained.
According to him, the situation at the plant remains active, although the fire has been extinguished.
KTAR's Cooper Rummell contributed to this report.