The fire started around 4:30 p.m. in an outdoor storage tank at the Rhodia plant. The plant was shut down for scheduled maintenance and no injuries were reported.
The fire generated sulfur dioxide vapor which can irritate the lungs if inhaled so nearby businesses and a mobile home park were evacuated.
Firefighters managed to put the fire out, and the evacuation was lifted around 10:15 p.m. Thursday.
