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Valero (1238), Meraux

LDEQ Accident Report

Accident #102854
State Police #08-00666
Accident Date2008-02-05
Report Date 2008-05-07
Follow-up Date 0000-00-00
Follow-up: No Information Provided

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Nitrogen Oxide30mFLARE - Fuel gas regulator to Boiler B-6 / North and South FlaresNOYESYES20.0 pounds
Particulate Matter30mFLARE - Fuel gas regulator to Boiler B-6 / North and South FlaresNOYESNO4,000.0 pounds

Accident Classified As:

Cause of Problem: Equipment Failure

root cause may have been contaminants in the fuel gas regulator to Boiler -B-6 which caused an automatic safety shutdown of Boiler B-6. As MOUSA attempted to restart the boiler and enact our Steam Shedding Olant to conserve steam, a steam deficit forcedBoiler B-5 and more units into safety shutdowns, resulting in large flares with smoke. A contributing factor was the inability to quickly restart Boiler B-6, which could not achieve startup permissive in the control system due to improper inlet airdamper position.

Discharge Preventable - No

Notes/Remedial Actions

This incident was self reported by Murphy who described it in their first report to LDEQ as, smoking flares going off due to loss boiler and emissions from the hydrocracker and cat cracker√Čunknown chemical. The LDEQ report says the incident lasted several hours yet does not include any information regarding what type of chemical was released. The verbal update from Murphy (with no date) says that small amounts of sulfur dioxide were released and small amounts of nitrogen - maybe 10 pounds - was reed. It also states that, Smoke is particulates is unknown. This incident was not preventable because the failure of the fuel gas regulator was not a predictable event. Remedial Measures - MOUSA replaced the fuel gas regulator on Boiler B-6 and instal