Image courtesy of LyondellBasell A view of the LyondellBasell chemical complex in La Porte, TX. Two workers died and 30 others were injured after 100,000 lb of acetic acid leaked at the firm’s La Porte, TX chemical complex. New information emerged this week on the US Chemical Safety and Hazard Identification Board’s (CSB) investigation into a deadly acid release at the LyondellBasell chemical complex in La Porte, TX. 100,000 lb of acetic acid leaked at the firm’s complex on July 27 as maintenance work was underway. Two contractors were killed, and 30 other workers were taken to area hospitals for treatment or examinations.