BENTONVILLE, AR - One person was injured when a massive fire broke out Wednesday afternoon (Dec. 4) at a northwest Arkansas plant making herbicide and insecticide. Of particular concern to firefighters was a storage tank containing 35,000 gallons of flammable difluoroethane, used as a propellant in aerosol sprays, KFSM reports. Firefighters were able to protect that tank but lost three others containing polystyrene beads. With the fire extinguished, the plant building remains intact with significant fire damage to the interior. During the fire, officials issued a smoke alert to the public based on the large amount of laminated plastic involved.