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Motiva Enterprises (1406), Norco

LDEQ Accident Report

Accident #81376
State Police #05-05586
Accident Date2005-08-16
Report Date 2005-08-23
Follow-up Date 2005-12-23
Follow-up: Yes

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Heavy Gas OilTank A-410 (EPN 1021-95)NONONO7,405.0 gallons
Volatile Organic Compounds (VOCs)Tank A-410 (EPN 1021-95)NONOYES699.9 pounds
NaphthaleneTank A-410 (EPN 1021-95)NONOYES4.0 pounds
BenzeneTank A-410 (EPN 1021-95)NONOYES 

Accident Classified As: Reportable Quantity

Cause of Problem: Human Factors

DU5 was starting up and the HGO routing to A-410 was changed from off-spec to the HGO treaters. During this time the bypass valve was left in the open position causing heavy gas oil to overflow from tank A-410 into the tank dike area.

Discharge Preventable - Yes

Notes/Remedial Actions

Remedial actions: Operator immediately closed bypass to LCV-100. Flow to A-410 was stopped and level pumped down. Liquid in tank dike was removed via vacuum truck. Soil excavation was conducted. To prevent recurrence, Motiva plans to develop plans to improve level control scheme and alarm management. They also plan to install a concrete liner inside the tank's secondary containment dike. PDF includes soil analytical data for soil samples tested for extractable petroleum hydrocarbons (EPH).