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CITGO Petroleum (1250), Lake Charles

Releases of Carbon Dioxide

LDEQ Accident Number
Accident Date		 Point Source(s) Notes Amount of Release
84652

2005-12-17		B-11 FLARE
Cause: Result of a shutdown of the JC-201 Compressor at the Coker II Unit. Root cause was due to an incorrect engineering design flaw in Transformer 444-S49-TRI-A protective relaying scheme. Transformer had been taken out of service to repair a secondary busing oil leak, and during re-energizing of the transformer the malfunction caused a power outage, causing shutdown on several critical pumparound pumps; the resulting loss of heat removal caused the overheated drum F-210 to fill with liquid.

Followup: Yes

Notes: Caused the 4.16kV tie breaker to open when the differential relay operated. A significant contributing cause of the additional flaring after power was restored was the plugging of the case drains on JC 210 compressor. Engineering calculations states that they expected SO2 released to be slightly lower than their original report, under the NRS Consent Decree, and then stating that they calculated 35,458 lbs were released. No information given on amounts of H2S or CO2 released (does not say specifically BRQ, but only SO2 was listed as exceeded permit levels).
83969

2005-11-18		C-FCC Unit
Cause: Release from the C-FCCU; a relief valve lifted, releasing CAT gas, causing H2S and CO2 to be sent to the flare. Related to incidents that occurred as a result of shutdown/startup associated with Hurricane Rita.

Followup: No

Notes: Claims emission was below RQ. The relief valve was blocked, ending the incident on the day of occurrence. Related to incident number 82492.