The following is extracted from ERG Guide 160: HALOGENATED SOLVENTS
PUBLIC SAFETY
· As an immediate precautionary measure, isolate spill or leak area for at least 50 meters (150 feet) in all directions.
EVACUATION
Large Spill
· Consider initial downwind evacuation for at least 100 meters (330 feet).
Fire
· If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions.