Abstract: At 9:15 p.m. on January 11, 1999, a serious injury accident occurred at a metal products manufacturing facility. Three employees were temporarily reassigned from their regular jobs to prepare a concrete floor for a new production area or room. This involved removing the old tile and some carpeting. Two employees were working inside a smaller room, located within the large room, and were having difficulty in removing old adhesive from the floor. It was decided to use acetone as a solvent to remove the adhesive. While scrubbing the floor with an electric buffer, the acetone vapors ignited. Employee #1 and Employee #2 were seriously burned and hospitalized for special treatment. Employee #3, who was working outside of the small room, burned his hand while assisting his coworkers. He was not hospitalized.