Investigation Report: Chlorine Release July 20, 2003 (7 Injured): CONTAMINATED ANTIMONY PENTACHLORIDE EXPOSURE JULY 29, 2003 (1 Killed) HYDROGEN FLUORIDE RELEASE August 13, 2003 (1 Exposed, 1 Injured)

On July 20, 2003, a release of chlorine gas from the Honeywell International, Inc. (Honeywell) chemical plant in Baton Rouge, Louisiana, resulted in injuries to seven plant workers and issuance of a shelter-in- place advisory for residents within a 0.5-mile radius. On July 29, 2003, a 1-ton cylinder at the same plant released its contents to the atmosphere, fatally injuring a plant worker by exposing the worker to contaminated antimony pentachloride. On August 13, 2003, two workers at the plant were exposed to hydrogen fluoride requiring hospitalization for one of those workers. The U.S. Chemical Safety and Hazard Investigation Board (CSB) incident investigation determined root and contributing causes for the three incidents.