Crews successfully finished moving early Wednesday the chemical butadiene from the train derailment site in southwestern Jefferson County. The butadiene has been delivered to a rail yard, according to MetroSafe.

At 7:30 a.m. Wednesday, crews began working to work on car containing another dangerous chemical, hydrogen fluoride, MetroSafe said. MetroSafe said the “trans-loading” — moving from the wrecked cars to others to get the chemical from the scene — has gone well and no HF vapors have been detected in the work zone.

Dixie Highway will remain closed until the work is complete. Also, an evacuation of a half-mile radius around the derailment site — near Dixie Highway and Katherine Station Road — continue, as well as air restrictions.

(Five things to know about hydrogen fluoride.)