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Accident # | 103758 |
State Police # | 08-01306 |
Accident Date | 2008-03-08 |
Report Date | 2008-03-14 |
Follow-up Date | 2008-04-03 |
Follow-up: | Yes |
Pollutant | Duration | Point Source | Greenhouse Gas | Criteria Pollutant | Ozone forming chemical | Amount of Release |
Benzene | 10 h 50 m | Tank F-455 rundown line | NO | NO | YES | 25.5 pounds |
Xylene | 10 h 50 m | Tank F-455 rundown line | NO | NO | NO | 101.7 pounds |
Oil | 10 h 50 m | Tank F-455 rundown line | NO | NO | NO | 267.0 gallons |
Accident Classified As: Reportable Quantity
A leaking flange on the rundown line of tank F-455 was discovered during refill operations.
To avoid recurrence, investigation findings will be disseminated throughout operations via shift meetings.
Operations personnel halted product transfer, tightened the flange to stop the release, called out additional personnel to begin containment and vapor suppression foaming, began clean up operations, and notified the Norco Site Supervisor. All material released to the ground was picked up via vacuum trucks and stored in fractionation tanks to facilitate source control sampling. All hydrocarbon impacted soil was excavated and disposed of in Motiva's on-site landfill. Regarding remedial actions, each tank within the logistics organization will be evaluated on a case-by-case frequency to determine the need to excavate rundown lines during scheduled tank turnaround activities. The work scope of the tank turnaround process will be revised to include excavation and inspection of all flanges and to include flange make-up requirements that ensure an adequate seal is maintained at the flange interface.
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