Abstract: On July 8, 1992, Employees #1, #2, and #3 were removing screens from a shaft used to process polyester polymer. As the employees heated the retaining rings that held a screen in place, residual polymer degraded and released fumes. By the end of the day, the employees were ill. That night, Employee #3 went to a hospital emergency room, and was examined and released. The next morning, the three employees still felt ill and were sent to an emergency room. According to a doctor's diagnosis, the employees were suffering from metal fume fever. The doctor, however, was not aware that the resin contained antimony. Employee #1 was released the same day; Employee #2 was released on July 10, 1992; Employee #3 was released on July 13, 1992.