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Motiva Enterprises (1406), Norco

LDEQ Accident Report

Accident #157955
State Police #14-03484
Accident Date2014-08-08
Report Date 2014-08-14
Follow-up Date 2014-10-02
Follow-up: Yes

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Benzene6mHydrocracking UnitNONOYES0.0 pounds
Hexane6mHydrocracking UnitNONONO0.5 pounds
Volatile Organic Compounds (VOCs)6mHydrocracking UnitNONOYES238.3 pounds
Sulfur Dioxide6mHydrocracking UnitNOYESNO196.5 pounds
Particulate Matter6mHydrocracking UnitNOYESNO4.5 pounds
NOx6mHydrocracking UnitNONOYES23.8 pounds
Carbon Monoxide6mHydrocracking UnitNOYESNO129.4 pounds

Accident Classified As: Below Reportable Quantity (BRQ)

Cause of Problem: Human Factors

On August 8, 2014 Motiva's Hydrocracking Unit (HCU) flared process gas at the HCU elevated flare (FE-301) due to a unit upset. Contractors working in the area inadvertently opened a valve to supply instrument air to their project, but reduced necessary air supply to HCU resulting in loss of instrument air to various pressure relief valved (PRVs). These PRVs, designed to fail in the open position, released process gas to the flare due to loss of instrument air as a safety mechanism causing the unit upset at the HCU.

Discharge Preventable - No Information Given

Notes/Remedial Actions

Report was submitted by Motiva Enterprises, however the AI number provided was for Shell Chemical Plant-East Side. Motiva and Shell Chemical are located on the same lot and share many processes.