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ExxonMobil Chemical Plant (286), Baton Rouge

LDEQ Accident Report

Accident #88524
State Police #06-00661
Accident Date2006-02-01
Report Date 2006-02-08
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
Nitrogen Dioxide72 hBaton Rouge Turbine Generator exhaust stack S-85NOYESYES81.0 pounds
Nitrogen Oxide72 hBaton Rouge Turbine Generator exhaust stack S-85NOYESYES726.0 pounds

Accident Classified As:

Cause of Problem: No Information Given

Discharge Preventable - Yes

Notes/Remedial Actions

On 1/29/06 the BRTG unit was started up after turnaround. A fuel gas meter had been blocked in for recalibration during the turnaround. This meter is used to calculate the proper amount of nitrogen oxide suppression stream. After startup, this meter remained blocked in and was providing erroneous data to the controller, which resulted in the improper amount of nitrogen oxide suppression steam being supplied. This led to a permit deviation on the 25 PPM limit for the gas turbine generator, a regulatory deviation for the meter being unavailable, and the exceedence of RQs for nitrogen oxide and nitrogen dioxide. The flow meter unblocked and was returned to service. The report said that the incident was under investigation. Procedures would be modified as applicable.