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Marathon Ashland Petroleum (3165), Garyville

LDEQ Accident Report

Accident #131865
State Police #11-03577
Accident Date2011-06-16
Report Date 2012-06-22
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
Propane20 mRGP truckNONOYES0.9 pounds
Propylene20 mRGP truckNONOYES2.1 pounds

Accident Classified As: Below Reportable Quantity (BRQ)

Cause of Problem: Equipment Failure

While unloading a truck full of Refinery Grade Propylene (RGP), the relief valve on the truck began leaking to the atmosphere. Water was sprayed on the truck to cool it and the relief valve reseated in 20 minutes. An incident investigation is being conducted to determine why the incident occurred.

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 lines coming from the truck were immediately closed. The deluge (water) system was opened and water was sprayed on the truck to cool the truck until the relief valve closed. An incident investigation will result in recommendation items designed to prevent the recurrence of this event. Initial report mentions that problem could be weather related. Propylene is the HRVOC included in the numbers. Propane is the VOC in the report. Together, they constitute 3lbs of VOC or 2.1lbs of HRVOC separately.