Abstract: Employee #1 complained to his coworkers of back, chest, and arm pains prior to starting his work shift; one coworker suggested that he see a doctor and that he sit down and relax. Employee #1 said he did not have any heart problems and he believed he was suffering from sore back muscles. Employee #1 then started work at the Electroless nickel plating line. Coworkers had earlier observed him soaking his right fingers in a cold water soak tank #520, located directly across from tank #500, which contained a caustic detergent soak. Employee #1 was later found lying unconscious against tank #500; his back was against the tank and his right arm and the back of his head were submerged in the tank's liquid. Employee #1 had suffered a heart attack, and had then fallen backward toward tank #500. He was killed.