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|LDEQ Accident Number
|Point Source(s)||Notes||Amount of Release|
|tank 263||Cause: STORMS- styrene that is not permitted to be stored in tank in the east area south field tanks were emitted while stored in these tanks.|
Notes: LCCO is being removed from tank 263 (usual incident number not listed, LAC number given instead); this could have been preventable and the Refinery could have reduced rates, however this was not considered prudent under the given circumstances
|tank 766||Cause: level gauge on tank 766 was not responding correctly. Chemicals began flowing out of the drain on the tank.|
Notes: foam was sprayed on the tank to reduce exposure and fire potential. The tank was slowly emptied to ensure the roof did not shift and damage the tank.
|E3A- & E3B||Cause: safety valves lifted|
Notes: There were 2 incidents involved- the 1st did no exceed any reportable quantities, the 2nd incident started on 3/24/05 at 11:21pm and ended at 11:30pm the same day; furnace reboiler was shut down to reduce tower pressure and allow safety valves to reseat; the actual release lasted 9 minutes (from 11:21pm to 11:30pm); the report stated that the safety valve release on 4 LEU was preventable, but the reboiler leak on E-3A was not expected as it was a newer bundle than E-3
|E-205 A/B exchanger bank on the Heavy Cat Naptha Unit||Cause: the E-205 A/B exchanger bank on the Heavy Cat Naptha Unit was leaking to Cooling Tower #27. The leak is believed to be from corrosion on the tube bundle.|
Notes: This incident was not preventable because the inspection data for this bank of exchangers did not indicate that a failure was imminent. These bundles were tested in January 2005 and were found to have no leaks. Remedial Measures - the exchanger bundle will be inspected and repaired or replaced as appropriate. The reportable quantities for benzene, toluene, naphthalene, volatile organic compounds, xylene mixed isomers, and o-xylene were exceeded. It is possible that the reportable quantities forylene and p-xylene were also exceeded, but available stream specification data does not allow differentiation between the these two isomers
|E-205 C/D exchanger bank on the Heavy Cat Naptha Unit||Cause: the E-205 C/D exchanger bank on the Heavy Cat Naptha unit was leaking to Cooling Tower #27. The leak is believed to be from corrosion on the tube bundle.|
Notes: This incident was not preventable because the inspection data for this bank of exchangers did not indicate that a failure was imminent. These bundles were tested in January 2005 and were found to have no leaks. Remedial Measures - the exchanger bundle will be inspected and repaired or replaced as appropriate. The reportable quantities for xylene, benzene, toluene, naphthalene, and volatile organic compounds were all exceeded
|E-3 exchanger on the Coker||Cause: the leak is believed to have been caused by corrosion and erosion|
Notes: There is no information whatsoever as to why the accident was preventable. Remedial Measures- the bundle was replaced with a new bundle. In the letter to LDEQ, Exxon states that the reportable quantities for hydrogen sulfide and benzene were exceeded
|E-553B Exchanger at the coker|
E-553B Exchanger leak at the coker
|Cause: -the E-553B exchanger on the Coker was leaking to Cooling Tower #44. The leak is believed to be from the corrosion on the tube bundle.|
Notes: Remedial measures - The leaking tube on the E-553 exchanger will be plugged and the exchanger will be pressure tested before it is returned to service. The accident was not preventable because the exchanger had not leaked previously and the tube bundle was approximately 18 months old. The report letter to LDEQ states that the reportable quantities for benzene, hydrogen sulfide, volatile organic compounds, and 1,3-butadine were exceeded.
|Spill||Cause: Incomplete weld on #1 PHLA Line|
Notes: Once identified line was removed from service andleak was clamped to stop release. Line will be re routed in overhead pipeband.
|Spill/suction line||Cause: Leaking oil was caused by an improperly installed blind on a common suction line used for mixing gasoline components.|
Notes: A vacuum truck immediately began to pick up the pooled oil. The blind was reinstalled and other installations for the same mechanical work were checked. Contaminated soil removed. The LDEQ reportable quantity for oil to soil (1 barrel) was exceeded and the RQ for Benzene (10 lbs) was also exceeded. Amount of Light Cat Naptha released was 11.3 barrels and amount of benzene released was 31.7 pounds.
|transfer piping||Cause: Failure of line of transfer piping from gasoline tankage to loading line due to corrosion at the air-soil interface of piping.|
Notes: RQ exceeded. Isolated line with blind installation. Replaced with new piping and special program has been initiated to emphasis piping that may be subject to air-soil interface corrosion. Contaminated soil removed. The refinery letter misstates that the accident occurred on 08/21/09. The following RQs were exceeded: xylene, toulene, ethylbenzene, napthalene, benzene, n-hexane, cyclohexane, 2,2,4-trimethylpentane, VOCs, oil to soil, and flammable vapor.
|2795-V6, Refinery Tank Farm||Cause: ExxonMobil Refinery Plant reported several operating compliance matters and potential RQ exceedances resulting from upset conditions caused by Hurricane Isaac.
Tank 109: An external roof vent was discovered missing on tank 109. There was no damage to the floating roof of this tank and there are no additional emissions from the missing vent on the external roof of tank 109.
Tank Socks: Multiple tank socks were discovered missing.
Tank 785 Pontoon Covers: Four pontoon covers were discovered blown off tank 785.
External Storage: No flaring occurred as a result of the temporary shutdown/curtail of butane and isobutane to alternative despositions to eliminate potential flaring
Continuous Emissions Monitoring System (CEMS):
CEMS analyzers at the BRRF may have experienced less than 90% data availability.|
Notes: Tank 109: There were no additional emissions from the missing vent on the external roof of tank 109. Tank Socks: The missing socks will be replaced as soon as possible (or within 45 days). Tank 785 Pontoon Covers: Upon discovery, the pontoon covers were repositioned. There were no excess emissions. External Storage: No flaring occurred as a result of the temporary shutdown/curtail of butane and isobutane to alternative despositions to eliminate potential flaring Continuous Emissions Monitoring System (CEMS): ExxonMobil is working to determine the extent to which the CEMS analyzers may have malfunctioned. The findings will be included in the CEMS quarterly report. The report lists a summary of estimated pounds released until repairs. The report suggests that estimates are assuming it would take 45 days to make necessary repairs.