The South Jersey Times cites the Gloucester County Freeholder director Robert Damminger - a local official - who confirmed that at least one of the carriages contained vinyl chloride.
It also quote county officials as saying that an environmental clean-up firm is attempting to place booms in the waterway to contain the spill.
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A colder start to the day with outbreaks of rain expected across Wales and southern England.
A further 85 buses are expected to arrive on Tuesday and Wednesday, with officials saying the entire operation will last at least a week.
The reality star had filed a defamation lawsuit against celebrity gossip site MediaTakeOut.com.