Investigation Report

DuPont La Porte Facility Toxic Chemical Release

CSBU.S. Chemical Safety and Hazard Investigation Board

DuPont La Porte Facility Toxic Chemical Release

Read at CSBOpens the publisher’s page on csb.gov

Summary

Investigation of a fatal methyl mercaptan release at DuPont’s La Porte insecticide unit. Four workers died inside the manufacturing building. The report examines hydrate-blocked pipework, drain valves, inadequate safeguards, alarm communication and emergency response, alongside management of change, audit effectiveness, process safety culture and misleading reliance on occupational injury metrics.

Topics

About This Record
Publisher
U.S. Chemical Safety and Hazard Investigation Board
Type
Investigation Report
Date
25 June 2019
Topic
Hazardous Substances, Leadership and Safety Culture, Loss of Containment, Process Safety, Safety-Performance Measurement
Activity
Inspection and Maintenance
Equipment
Breathing Apparatus, Gas Detector, Process Pipework and Pipelines, Pumps, Valve
Control
Emergency Response, Atmospheric Gas Testing, Independent Audit and Verification, Management of Change
Sector
Downstream and Process Industries
Setting
Onshore Facility
Link
Checked , working
Record
csb-dupont-la-porte-facility-toxic-chemical-release · added 2 September 2026

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