Abstract: Employee #1 was preparing to begin sandblasting inside a 36 in. diameter horizontal pipe from which an elbow had been removed. The elbow had penetrated the top of a slurry tank through an open hole 36 in. in diameter. The hole had not been covered and Employee #1 fell into the 32 ft. deep tank. The employee had a safety belt and had been instructed to wear it at appropriate times, but he was not wearing it at the time of the accident. He did have on a sandblasting hood. As he fell, he hit a protruding steel baffle inside the tank and the hose on his helmet apparently caused the helmet to be jerked back on his head. Employee #1 suffered a massive head injury and died approximately four hours later.