About 5,000 residents evacuated after the derailment of a freight train carrying flammable and toxic gas in eastern Tennessee were allowed home on Friday as investigators looked into the cause of the fiery accident, reports Reuters.
Authorities were examining the black box from the CSX Corp train that derailed with one tank car bursting into flames at midnight Wednesday in Blount County, near Maryville, Tennessee.
The tank car fire was extinguished by late Thursday, CSX said. The car was loaded with about 24,000 gallons of acrylonitrile, a hazardous material used in manufacturing plastics and other industrial processes.
Nearly all of the acrylonitrile escaped during the fire, a CSX official said at a noon press conference.
Noxious fumes sent more than 80 people to hospital, including 10 law enforcement officers who were kept overnight, said Blount County Sheriff’s spokeswoman Marian O’Briant.
The U.S. Environmental Protection Agency was testing air, soil and water samples and “so far everything is looking good there,” O’Briant said.
Residents were advised not to use well water until final test results are released later on Friday, county officials said. They said about 200,000 air monitoring locations showed no significant contamination.
After about 36 hours, all of the 5,000 residents who were evacuated from a 1.5-mile radius of the derailment were allowed to return home. Blount County has urban and rural areas and is home to part of the Great Smoky Mountains National Park.
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