Abstract: At approximately 7:20 p.m. on May 17, 2012, Employee #1, a mechanic with Manatts Inc., was informed by a coworker that there were water leaks in a 4000 gallon water tank (Serial Number: 40003SWN0171), that had been mounted on a 1995 Mack straight truck (DM600, VIN: 1M2B209C1SM015470). The water tank had a pneumatic powered sliding hatch door located on the top of the tank for access into the tank. At approximately 8:00 a.m., on May 18, 2012, Employee #1 was found, by a coworker, caught in the water tank access hatch opening between the sliding door and the hatch door frame of the tank. Employee #1 was caught by the throat, with head and one arm outside the tank. The rest of Employee #1's body was inside the tank. The water tank was empty with approximately 1 in. of water in the bottom. Employee #1 died.