An oldie but a goodie, showing how chlorine, with a VD>2.5 acts during a release (i.e. stays on the ground). On August 14, 2002, a chlorine transfer hose ruptured during a rail car (90 ton) unloading operation at a chlorine repackaging facility near Festus, Missouri. The hose rupture ultimately led to the release of 48,000 pounds of chlorine, causing three workers and 63 residents to seek medical treatment.