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Marathon Ashland Petroleum (3165), Garyville

Releases of Ethylbenzene

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.
11.0 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.