Are you inspecting your expansion joints?

At 1:45 a.m. there was an accidental release of chemical vapors. Carbon tetrachloride, containing chlorine and hydrochloric acid, formed a cloud after being released through a failed expansion joint on a chlorine absorber feed cooler inlet. Employees #1 through #6 were injured when they inhaled the vapors. Three of them were hospitalized.

Source:OSHA.gov