Propylene leak from rail car is contained in New Jersey

A propylene leak from a rail car has been contained at an industrial park in New Jersey.

A rail car filled to the top with 30,000 gallons of highly flammable propylene started leaking around 10 a.m. Thursday morning on the unit block of Osprey Court. A valve stem failure caused it to leak for 5 hours before it was capped by hazmat crews.

James Rakus captured video of the huge gas plum at the leak site. He of was one of 1,900 workers at nearly 100 businesses and a daycare center evacuated from the Pureland Industrial Park. For fear of sparking an explosion, evacuees were forced to walk not drive to a safe zone nearly a half mile away.

"Our supervisors came up to us initially shelter in place. Then it was no. They came back in and say we have to evacuate," witness Ben Labar told FOX 29.

Two workers were sent to Crozier Medical Center in Chester for chemical burns. Both are expected to be OK.

Fire officials gave the all clear for the hundreds of employees to return back to their jobs. All roads have since re-opened and officials say there's no air quality issues.