The National Transportation Safety Board is planning a hearing to gather facts about a November train derailment in New Jersey that caused a noxious gas to be released into the air.
The hearing is scheduled for Washington on July 9 and 10.
There are no fatalities conclusively linked to the accident, but several residents in Paulsboro have filed lawsuits against Conrail, which owns the track.
Conrail officials say they are cooperating with the investigation and will participate in the hearing.
The freight train derailed on a bridge on Nov. 30. A car containing vinyl chloride was ripped open, releasing the gas.
Evacuations of the surrounding area lasted several days.