Federal investigators determined a pressure relief valve on a tank had been removed when the company moved the tank to its Louisville plant in 1989. The tank exploded because there was no relief valve, according to a report from the Chemical Safety Board.
(source)
Is it just me, or is that a terribly-structured article with a poor order of information presentation?
It's just bad. Local media was including that in their early reporting and it just made it even more confusing.