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Marathon Ashland Petroleum (3165), Garyville

Releases of Toluene

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

Outfall #002
Cause: BTEX (Benzene,Toluene,Ethylbenzene,Xylene) sample taken prior to discharging test water showed non-detect levels. However, a follow-up sample collected during the discharge disclosed levels above permitted levels of BTEX in water.

Followup: No

Notes: Facility is "working with the lab to avoid any reoccurrances". BTEX Levels equaled 401 ppb. Limit is 250 ppb. 151 ppb in excess.

Tank 120-6 (EIQ No. 16-74 and EQT 76)
Tank 120-6 (EIQ No. 16-74 and EQT 76) Tank 120-6 (EIQ No. 16-74 and EQT 76)
Cause: It is suspected that there was a failed level indicator on 6/26/05 which led to the product being on the roof of the tank. The cause of the failure in unknown.

Followup: Yes

Notes: The product was transferred to a finished gasoline storage tank. The cause of the failure and subsequent leak are still unknown and are awaiting the results of the investigation.
115.0 pounds


Unit 59 North Flare
Cause: 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.

Followup: Yes

Notes: 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.
40.6 pounds


Cause: During an excavation in the refinery's crude unit on October 21 at 16:44 hours, hydrocarbon impacted soil was discovered adjacent to an underground pump out line. The line was previously used to deinventory the unit for maintenance activities but was decommissioned prior to 2000. Samples were taken and analyzed for various pollutants. Amounts of several hydrocarbons (2-Methylnapthalene, Napthalene, Benzo(a)pyrene, Dibenz(a,h)anthracene and Aromatics>C10-C12) in at least one of the samples exceeded standards put in place Louisiana Risk Evaluation/Corrective Action Program.

Followup: No

Notes: A work plan is currently being developed to determine the area of contamination. Report does not indicate if additional excavation and soil disposal is planned.

leak from process line in U263 piperack
Cause: On June 29, a pinhole leak was discovered in the LPG feedline from U212 to U222.

Followup: No

Notes: The line was purged with nitrogen and isolated for repairs. The Shift Emergency Response Team was activated and fire monitors were put on the leak to suppress any vapors. Reduced the U212 charge rate to minimize the leak. The line was isolated at battery limits in U222 and U212 to stop the leak. Once the investigation is complete, recommendations will be implemented.
0.3 pounds

U212 Platformer unit
Cause: On May 22, a small leak and hydrogen fire was observed on the 48" flange on the process piping going from cell 1 of the Unit 212 Charge Heater to Reactor #1. The leak was pinhole sized in width and no larger than 1" around the circumference of the flange. The emission point involved was a flange on a process line in the U212 Platformer unit.

Followup: Yes

Notes: Steam was applied to the flange to extinguish the flame and the flange was hot bolted to secure the leak. Once the investigation is complete, recommendations will be implemented. An additional followup on 10/23/13 corrected the initial followup report's emissions data regarding greenhouse gas releases.
0.0 pounds