Abstract: At approximately 3:15 p.m. on July 19, 2003, Employee #1, a new employee, was operating trailer-mounted mobile equipment to supply compressed air to a steam well drilling rig. The equipment was manufactured by Air Comp, LLC, an Allis-Chalmers/M-1 Company. As he attempted to divert oil and water contaminated air from a filter chamber into a 350-gallon disposal holding tank, provided by Cal-Pine, the disposal tank became pressurized and exploded. Large parts of the tank became airborne, striking Employee #1. He was hospitalized and pronounced dead due to injuries sustained. A detailed investigation revealed that two venting plugs, located on the tank, were not removed, causing pressurization of the tank and eventual explosion.