On April 21, 2021, two employees were working inside a rail tank car that had previously contained pressurized propane. The two employees were conducting ultrasonic testing on the welds of the interior of the tank car. Employee one exited the tank manway and expressed concern that he was starting to smell something. Employee three, the attendant, immediately told employee one that he and employee two should exit the tank. As employee one went down the ladder to inform employee two to exit, an explosion inside the tank car occurred.
Significant Factors
