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Marathon Ashland Petroleum (3165), Garyville

LDEQ Accident Report

Accident #132152
PDF AvailablePDF
State Police #11-03854
Accident Date2011-06-30
Report Date 2011-07-06
Follow-up Date 0000-00-00
Follow-up: No

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Sulfur Dioxide2 mUnit 59 North FlareNOYESNO1.3 pounds
Propane2 mUnit 59 North FlareNONOYES17.9 pounds
Ethane2 mUnit 59 North FlareNONOYES0.2 pounds
Methane2 mUnit 59 North FlareYESNOYES0.2 pounds
Hydrogen2 mUnit 59 North FlareNONONO0.2 pounds
Nitrogen Oxide2 mUnit 59 North FlareNOYESYES1.2 pounds
Carbon Monoxide2 mUnit 59 North FlareNOYESNO1.0 pounds
Particulate Matter 102 mUnit 59 North FlareNOYESNO0.1 pounds
Hydrogen Sulfide2 mUnit 59 North FlareNONONO0.0 pounds

Accident Classified As: Below Reportable Quantity (BRQ)

Cause of Problem: Process Upset

The pressure relief valve on the unit 232 rich amine flash drum failed. Material in the flash drum was depressured by flaring until the relief valve would have closed. Leaking release valve and sour water stripper. Material was sent to Unit 59 North Flare (EQT# 0162 and EIQ# 83-74)

Discharge Preventable - Under Investigation

Not known at this time. the results of the incident investigation will determine whether or not this was preventable.

Notes/Remedial Actions

The flash drum was allowed to depressure to the flare until the relief valve would have close and the valve could be repaired. an incident investigation will result in recommendation items designed to prevent the recurrence of this event.