Abstract: On October 1, 2010, Employee #1 parked his tanker truck inside a tanker bay for loading sludge, which was done through a spout that stuck into the tanker. The pumps control was located on the spout itself that Employee #1 was operating. A coworker that was located just through a door and east of the tanker bay, observed Employee #1 sitting on top of the tanker truck when he heard the pump shut off. He continued his work for approximately 15 minutes; however, he became concerned when Employee #1, nor the tanker truck, had moved. The worker walked over to Employee #1 and climbed up on the tanker. He found Employee #1 face down inside the tanker. He pulled Employee #1 and checked for a pulse. Noticing that Employee #1 was blue in color and not being able to find a pulse, the worker climbed from the truck and went to find help. Employee #1 died from asphyxia.