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ExxonMobil Refinery (2638), Baton Rouge

LDEQ Accident Report

Accident #89742
State Police #No Information Given
Accident Date2006-07-05
Report Date 2006-08-04
Follow-up Date 0000-00-00
Follow-up: No

Pollutants Released

Pollutant Duration Point Source Greenhouse Gas Criteria Pollutant Ozone forming chemical Amount of Release
Carbon Monoxide1hCheck Valve on the Fluid Catalytic Cracking UnitNOYESNO1,011.0 pounds

Accident Classified As:

Cause of Problem: Equipment Failure

-during a routine maintenance check of the boiler feed water circulation pumps on the F-301 furnace, a check valve failed to function properly. As a result, the turbine operating the feed pump tripped off and the boiler feed water flow to the furnace was lost

Discharge Preventable -

Notes/Remedial Actions

This incident was not preventable because the failure of the check valve to function properly was not expected, and there were no indications that this valve might malfunction. Remedial Measures - the check valve will also be replaced on the sistertrain for F-201. The carbon monoxide maximum hourly permit emission limit and the maximum hourly concentration limit from 63 CFR Subpart UUU were exceeded. The MACT II hourly limit for carbon monoxide and the maximum hourly permit limit for carbon mode were exceeded at the WGS. However, because the failure of the check valve is covered under the unit's Startup, Shutdown, Malfunction Plan and is considered a malfunction, the exceedance of the permit limit is considered an Upset pursuant to LA