![]() The derailment prompted many lingering concerns for the roughly 5,000 residents of East Palestine, even though state and federal officials say their tests haven’t found any harmful levels of toxic chemicals in the air or water around the derailment. ![]() 3 derailment that venting the hazardous materials cars was the best way to prevent a disastrous explosion. Shaw said the railroad agreed with all the officials responding to the Feb. The resulting toxic fire prompted the evacuation of half of East Palestine, Ohio, and the surrounding area near the Pennsylvania border. ![]() ![]() Norfolk Southern CEO Alan Shaw has said the failure of the valves was part of why officials decided to breach the cars and burn off the vinyl chloride. The NTSB said melted aluminum may have degraded the performance of the valves and kept them from releasing some of the flammable gas to relieve pressure inside the tank cars. The National Transportation Safety Board said investigators determined the aluminum covers over the pressure relief valves on three of the five tank cars carrying vinyl chloride melted and that some of the metal was found around the valves. Investigators looking into the fire that erupted after the derailment said it melted a key part of the tank cars filled with toxic chemicals, leading federal officials to warn railcar owners earlier Thursday to check their fleets for similar flaws.
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