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CITGO Petroleum (1250), Lake Charles

LDEQ Accident Report

Accident #132764
State Police #11-04563
Accident Date2011-08-01
Report Date 2011-08-04
Follow-up Date 2011-08-08
Follow-up: Yes

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Sulfur Dioxide4h 35mFired heaters and boilersNOYESNO2,354.0 pounds
Hydrogen Sulfide4h 35mSulfen Vent Stack EQT297, Tail Gas II Vent Stack EQT298, B-7 FlareNONONO 
Carbon Monoxide4h 35mB-7 Flare EQT347NOYESNO 
Carbonyl Sulfide4h 35mSulften Vent Stack, Tail Gas II Vent StackNONOYES 
Carbon Disulfide4h 35mSulften Vent Stack, Tail Gas II Vent StackNONONO 

Accident Classified As: Reportable Quantity

Cause of Problem: Human Factors

The operator failed to manually reset the solenoid valve that controlled the level in the F-104 drum prior to restarting the JC-102 compressor. Based on the definition of control equipment inLAC 33:III.1 1 1, Citgo failed, in this incident, to diligently maintain control equipment in proper working order whenever emissions were being made. That initial failure to reset the solenoid valve cause a string of upsets, which began with the central amine upset.

Discharge Preventable - Yes

The solenoid valve should have been manually reset prior to restarting the JC-102 compressor. Had this happened, it is possible that the F-104 drum would not have flooded, and the string of upsets would not have occurred.

Notes/Remedial Actions

Immediate corrective actions taken were removing excess hydrocarbon from the central amine unit, amine feed to the SRUs was reduced, and efforts were made to identify the hydrocarbon source. Citgo conducted an incident investigation, which outlines several actions to be taken. Additional letters from refinery regarding this incident: 8/18/11, 10/27/11