Investigation Report

Marathon Martinez Renewable Fuels Fire

CSBU.S. Chemical Safety and Hazard Investigation Board

Marathon Martinez Renewable Fuels Fire

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

Summary

Investigation of a renewable diesel startup fire at Martinez, California, following heater tube rupture. Low process flow and afterburning caused overheating, releasing diesel and hydrogen and seriously injuring an operator. The report examines valve alignment, instrumented safeguards, combustion monitoring, alarm responses, human factors and corporate oversight, with recommendations and comparisons to earlier incidents.

Topics

About This Record
Publisher
U.S. Chemical Safety and Hazard Investigation Board
Type
Investigation Report
Date
13 March 2025
Topic
Fire, Functional Safety, Human Factors, Loss of Containment, Process Safety
Equipment
Process Pipework and Pipelines, Valve
Control
Alarm Management, Independent Audit and Verification, Operating and Work Procedures, Risk Assessment
Sector
Downstream and Process Industries
Setting
Onshore Facility
Link
Checked , working
Record
csb-marathon-martinez-renewable-fuels-fire · added 2 September 2026

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