Abstract: At 9:00 a.m. on May 30th, 2019, an employee was observing coworkers filling a nurse tank with anhydrous ammonia at an outdoor filling station. During the filling process one of the valves began to leak. The employee began examining the malfunctioning valve with the assistance of a coworker. The employee was positioned directly in front of the valve outlet while the coworker was above the valve stem at the top of the tank attempting to tighten the valve when an ammonia leak occurred and struck the employee in the face. The employee was not wearing eye protection and suffered 2nd degree chemical burns to the face and temporary blindness, requiring hospitalization.