At about 1:00 p.m. on April 28, 2020, an employee was checking a sulfuric acid railcar to ensure that it was empty before it was sent offsite for cleaning and decommissioning. The employee loosened the railcar's dip tube cap with a pipe wrench, then removed it. Residual pressure in the railcar sprayed about 4 pounds of acid into the employee's face, causing chemical burns to the employee's forehead, cheeks and nose.