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Marathon Ashland Petroleum (3165), Garyville

LDEQ Accident Report

Accident #143781
State Police #12-06762
Accident Date2012-10-12
Report Date 2012-10-18
Follow-up Date 2012-12-20
Follow-up: Yes

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Volatile Organic Compounds (VOCs)Unit 59 North FlareNONOYES2,223.2 pounds
Highly Reactive Volatile Organic CompoundsUnit 59 North FlareNONOYES105.2 pounds
Nitrogen OxideNOYESYES275.0 pounds
Carbon MonoxideNOYESNO1,496.5 pounds
Sulfur DioxideNOYESNO260.1 pounds
Volatile Organic Compounds (VOCs)NONOYES5,133.2 pounds
Particulate Matter 10NOYESNO30.1 pounds
Particulate Matter 2.5NOYESNO30.1 pounds
Highly Reactive Volatile Organic Compounds (HRVOCs)NONONO123.2 pounds
BenzeneNONOYES15.2 pounds
Hydrogen SulfideNONONO1.3 pounds
ButaneNONOYES4.7 pounds
n-ButaneNONONO74.3 pounds
IsobutaneNONOYES14.1 pounds
PentaneNONOYES256.0 pounds
n-PentaneNONONO142.9 pounds
Pentene PlusNONONO727.1 pounds
CyclohexaneNONOYES3.3 pounds
n-HexaneNONONO19.8 pounds
TolueneNONONO40.6 pounds
PropaneNONOYES30.7 pounds
T-butene2NONONO11.1 pounds
MethaneYESNOYES61.0 pounds
EthaneNONOYES28.6 pounds
EthyleneNONOYES2.7 pounds
PropyleneNONOYES6.1 pounds
1-ButeneNONOYES8.4 pounds
Carbon DioxideYESNONO1.5 pounds
HydrogenNONONO15.6 pounds
NitrogenNONONO20.4 pounds
OxygenNONONO0.4 pounds

Accident Classified As: Reportable Quantity

Cause of Problem: Other - See text

The initiating incident was a pump seal fire in the Gasoline Desulfurization Unit (Unit 55). The fire was fueled by a leaking seal on the pump. Extinguishing the fire was delayed by inability to close an EIV on the suction side of the pump. This resulted in emergency shutdown of the unit. Two other events also occurred on this day including an upset in Sulfur Plant Unit 234 and a flame-out of the North Flare. Due to the fire and emergency shutdown of the Gasoline Desulfurization Unit, the Fluid Catalytic Cracking Unit cut feed, sending vent gas to the North Flare. Process vent gas was sent to the North Flare which increased the steam to the flare suddenly, snuffing the flare out.

Discharge Preventable - Yes

Notes/Remedial Actions

PDF too large to upload (109 pages) To re-light the North Flare, steam was gradually decreased and natural gas was added to the flare gas to allow the two available igniters to relight the North Flare. Parts to repair the North Flare pilot system were already on order when this incident occurred. The North Flare was taken out of service when the parts were received and repaired on October 31, 2012. Spare pilot and igniter assemblies are now in stock so that repairs can be made in a timely fashion if an incident like this is to occur again. Total amount of pollutants released was 59438.44 lbs, but 90% was claimed to be efficiently burned off, resulting in 5943.59 lbs that were actually released. The reportable quantity for Highly Reactive Volatile Organic Compounds (HRVOCs) (100 pounds) was exceeded during the 24 hour period.