Most large chemical spills will be caused by accidents in nearby industries or accidents that occur on adjacent highways or railroads. Fumes from these accidents can affect large areas.

Usually, the local police or fire department will notify the management office if any action is required due to external spills. However, the first report may come from employees. The Management Office should be notified immediately.

The building should not be evacuated unless ordered to do so by local authorities. If fume conditions become severe within the building, evacuation may be necessary. Good judgment must be used not to panic employees and to evacuate personnel away from the source of the fumes.