Air Liquide plant to resume normal operations Air Liquide plant to resume normal operations Advocate story June 23, 2012 Comments PORT ALLEN –– The Air Liquide Speciality Chemicals plant in Port Allen is expected to reopen and resume normal operation Wednesday, according to company spokesman Mike Rosen. The plant has been shut down since Monday, May 21 so that officials could investigate the cause of an explosion and chemical fire at the plant site. The fire forced nearly 200 residents living near the plant to evacuate their homes and caused officials to temporarily shutdown a 14-mile stretch of U.S. 190. Rosen said Tuesday the cause of the fire is still under investigation. It took emergency responders two days to put out the fire. Residents were allowed to return to their homes on Wednesday, May 23. Officials said only one person was injured in the incident. The Air Liquide employee was treated for minor burns and later released on the afternoon of the fire.