Chemical Spill Slows New Jersey Train Crash Probe | December 10, 2012 Issue - Vol. 90 Issue 50 | Chemical & Engineering News
Volume 90 Issue 50 | p. 10 | News of The Week
Issue Date: December 10, 2012 | Web Date: December 6, 2012

Chemical Spill Slows New Jersey Train Crash Probe

Security: Bridge and the train itself considered as cause for derailment
Department: Government & Policy
Keywords: freight train, derailment, vinyl chloride
Four tank cars ended up in Mantua Creek in Paulsboro, N.J., after a freight train derailed on Nov. 30.
Credit: NTSB
This is a scene photo of Nov. 30, 2012, bridge collapse, train derailment & haz-mat release in Paulsboro, NJ.
Four tank cars ended up in Mantua Creek in Paulsboro, N.J., after a freight train derailed on Nov. 30.
Credit: NTSB

An old New Jersey railroad bridge is a factor federal authorities are investigating as they search for the cause of a Nov. 30 train derailment and subsequent chemical leak that sent dozens of people to a local hospital. The accident, in the town of Paulsboro, also prompted the evacuation of some 500 residents, although no one was seriously injured. Investigators are working slowly because of concerns about the levels of the chemical in the air.

At a news conference last week, National Transportation Safety Board (NTSB) Chair Deborah A. P. Hersman said the inquiry is focusing on both the train and the bridge, which partially collapsed in the accident. The bridge was built in 1873 and reconstructed after it buckled in August 2009, derailing 16 railroad cars of coal.

Since the November accident, NTSB officials have been interviewing witnesses and examining inspection records to learn why a Conrail freight train hauling vinyl chloride derailed and dumped four tank cars into Mantua Creek, which empties into the Delaware River near Philadelphia.

One of the derailed cars ruptured, releasing into the air some 25,000 gal of vinyl chloride, a known human carcinogen. The chemical is used to make polyvinyl chloride plastic and vinyl products. Short-term exposure to high levels of the chemical in the air affects the central nervous system and can cause dizziness, drowsiness, and headaches.

Hersman said NTSB would not reach any immediate conclusions about the cause of the latest derailment while its investigators are on the scene.

NTSB investigators will enter the accident site after response crews remove the remaining vinyl chloride from the breached tank car. That work has been slowed because elevated levels of vinyl chloride have been detected in the area.

“It’s important for us to get access to the site because we want to thoroughly access the wreckage, document the condition of the bridge, the track, the condition of those cars,” Hersman said. “We want to make sure we understand how the tank car failed and how the pileup occurred.”

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