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Motiva Enterprises (2719), Convent

LDEQ Accident Report

Accident #117144
State Police #09-2544
Accident Date2009-08-07
Report Date 2009-08-14
Follow-up Date 2009-09-03
Follow-up: Yes

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Sulfur Dioxide7h 21mflare no. 2 and wet gas scrubberNOYESNO76,337.0 pounds
Nitrogen Oxide7h 21mflare no. 2 and wet gas scrubberNOYESYES333.0 pounds
Hydrogen Sulfide7h 21mflare no. 2 and wet gas scrubberNONONO191.0 pounds
Carbon Monoxide7h 21mflare no. 2 and wet gas scrubberNOYESNO11,369.0 pounds
Volatile Organic Compounds (VOCs)7h 21mflare no. 2 and wet gas scrubberNONOYES688.0 pounds
Particulate Matter 107h 21mflare no. 2 and wet gas scrubberNOYESNO37.0 pounds

Accident Classified As:

Cause of Problem: Equipment Failure

Regenerated Catalyst Slide Valve (RCSV) of the Fluid Catalytic Cracking Unit (FCCU) changed position without a corresponding command from the control system causing trip of the gas turbine driving the Wet Gas Compressor because of high exhaust temperature--overpressure control valve opened to flare. Exceeded RQ's.

Discharge Preventable - No

"there were no indications of any issues with the circuit board or the servo prior to this incident."

Notes/Remedial Actions

"Took immediate action to begin the process of stabilizing, slowing down, and diverting feed from the FCCU riser." Circuit board replaced, cleaned the servo and will replace it when spare arrives.