An estimated 2,548 barrels of carbon dioxide (CO2) leaked from the Exxon pipeline in Sulphur in Calcasieu Parish on 3 April, triggering an emergency response and alarm among residents who live in close proximity to scores of polluting pipelines, petrochemical and fossil fuel facilities.

It took more than two hours to fix the leak, which is “unacceptable”, according to Kenneth Clarkson from the Pipeline Safety Trust non-profit.

“Any release of this size of carbon dioxide should be taken seriously, especially given the proximity to homes in Sulphur … The operator should have promptly known about the leak from the pressure loss and quickly closed the valves and, as reported, they failed to do that,” said Clarkson.

“There are dangerous gaps in the federal regulations that we hope will be addressed.”