A federal agency looking into the exact causes of a toxic chemical leak at a DuPont plant in Texas that killed four workers says its investigation uncovered flawed safety procedures, design problems and inadequate planning.
On Nov. 15, 2014, a series of events at DuPont‘s La Porte, TX, insecticide plant led to liquid methyl mercaptan draining into a room, creating a toxic gas cloud.
Two workers were killed while in the process of trying to drain liquid from two valves. Two more workers died responding to a distress call one of the other two workers made before succumbing to the toxic gas.
The U.S. Chemical Safety Board released its preliminary findings into the incident.
A chain of events led to the methyl mercaptan release, according to the CSB