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Marathon Ashland Petroleum (3165), Garyville

Releases of Light Cycle Oil

LDEQ Accident Number
Accident Date		 Point Source(s) Notes Amount of Release
134363

2011-10-05		Unit 15 Heavy Gas Oil Hydrotreater
Cause: A 3/4 inch bleeder valve failed on the Reactor Charge Startup Bypass Line while process equipment was being cleaned with LCO. There was no known off-site impact. An incident investigation is being conducted to determine why the incident occurred. LCO was released to and contained to the concrete slab of the Unit.

Followup: No

Notes: The line was allowed to depressure to the flare until the pressure on the line was atmospheric. LCO was processed in the onsite Waste Water Treatment Plant. An incident investigation will result in recommendation items designed to prevent the recurrence of this event.		3,112.2 gallons