At 11:50 a.m. on October 21, 2021, an employee, 51, was assisting his coworkers in troubleshooting the fresh hydrogen fluoride (HF) system to the vaporizer. The employee was looking at an actuator that was across from a whisping flange when the flange failed, and hydrogen fluoride was sprayed on him. The employee screamed, and his coworkers came to his assistance. They escorted the employee to a safety shower that was out of the plume of the chemical release. Onsite medical responders provided care to the employee until an ambulance arrived to take him to the hospital, where he died from his injuries.