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CITGO Petroleum (1250), Lake Charles

Causal Factor: Weather

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

Bulkhead at B-Dock
Cause: Sheen observed (hydrocarbon release) from B-Dock; potentially released when area was inundated of the area during Hurricane Rita. Release of crude oil from C-Dock; during Hurricane Rita a nipple located on a crude oil loading arm was broken off.


Notes: Area was boomed off and crude oil material recovered. Offsite impact. Miller Environmental responded for the clean up. Crude oil approximately one foot thick. Tank either ovrflowed or line valve breach. Had small natural gas leak from inlet piping blowing.
Crude Oil: 1,699.0 pounds
Hydrocarbon: 0.1 pounds

Cause: Flaring of hydrocarbons for shut down for Hurricane Rita.


Notes: No information given


A Sulfur recovery Unit; B Sour Water Stripper; Unicracker
A Topper; B Topper; Coker II; C FCCU
CLAW sewer
Coker I, C Sulfur Recovery Unit; B Sour Water Stripper
E Sulfur Recovery
Multiple Units
Tank 504
Unicracker; C-FCCU
Unicracker; C-FCCU; B-5 FLARE; B6 FLARE; B7 FLARE
Unicracker; D Sulfur Recovery Unit
Cause: Shut down and start up from Hurrican Rita

Followup: Yes

Notes: Summary of releases over 31 days
Sulfur Dioxide: 1,161.0 pounds
Compressed Flammable Gas: 5,323.0 pounds
Compressed Flammable Gas: 12,759.0 pounds
Asbestos: 444,070.0 pounds
Compressed Flammable Gas: 12,758.0 pounds
Compressed Flammable Gas: 12,758.0 pounds
Compressed Flammable Gas: 12,758.0 pounds
Slop Oil: 5,391.0 pounds
Compressed Flammable Gas: 12,758.0 pounds
Compressed Flammable Gas: 3,207.0 pounds
Sulfur Dioxide: 23,441.0 pounds
Sulfur Dioxide: 2,689.0 pounds
Hydrogen Sulfide: 714.0 pounds
Sulfur Dioxide: 1,007.0 pounds
Sulfur Dioxide: 8,710.0 pounds
Sulfur Dioxide: 579.0 pounds
Sulfur Dioxide: 1,015.0 pounds
Sulfur Dioxide: 6,300.0 pounds

None Reported
Cause: Start up of B Sour Water Stripper.

Followup: Yes

Notes: The start up of B Sour water Stripper will be a part of facility wide start up after Hurricane Rita. The unit was shut down on September 19 to clean the feed/effluent exchanges, however, the unit was not restarted due to facility wide shutdown in preparation for Hurricane Rita. All releases associated with shut down and start up after the hurricane will be calculated under one incident number 05-05764

Cause: Rainstorms caused the pilots of the B1 flare to go out.

Followup: No

Notes: Combination of swirling winds and heavy rain with low flow of gas. Has been re-lit by the Safety Department. Initial report states offsite impact, while notification report states no offsite impact. Order made for the Operations to call the Shift Superintendent as soon as the flare goes out; will facilitate the Shift Supervisor's call to the Shift Safety Person on duty to light the flare with the flare gun, which should help reduce the time between flare pilot outage and relighting.
Flammable Gas: 1,334.0 pounds

Cause: heavy rain and high winds blew out the pilot

Followup: No

Notes: Combination of swirling winds and heavy rain with low flow of gas. Pilot gas flow rate has been increased. No offsite impact.
Flammable Gas: 3,172.0 pounds

B4 Flare Girbotol Unit
Cause: high winds caused loss of B4 Flare pilot

Followup: No

Notes: Claims emission was below RQ


No Information
Cause: weather caused pilot light outage on the B4 Girbotol flare

Followup: No Information Provided

Notes: 7 day follow up written response was not submitted DEQ - went for investigation


PFU Flare CB701
Cause: flare pilot was lost during heavy rain storm

Followup: No

Notes: Steps being reviewed are: a) remocal of materials from steam trenches to prevent water on steam piping b) installation of a small air compressor for use in relighting the flare pilot
Flammable Gas: 5,059.0 pounds

B-12 flare, wastewater treatment plant
Cause: Refinery experienced a heavy rainfall event, greater than 8 inches;of rain in 36 hours. 250 psig steam lines became submerged in water and as a result the steam condensed and caused a drop in pressure, eventually stopping the flow of rich amine throughthe Central Amine unit. This resulted in the loss of acid gas production. The SROs eventually shutdown due to lack of feed. Off gas went to the B-12 flare. Rainfall runoff exceeded the available capacity of the wastewater treatment system storm water tanks and the treatment system. When the capacity of the storm water tanks was exceeded, slop oil and wastewater overflowed from the tanks into the protective dike area surrounding the tanks allowing evaporation of benzene, etc.

Followup: Yes

Notes: The lack of amine treatment of refinery fuel gas caused the hydrogen sulfide content in fuel gas to exceed permit limits Hydrogen Sulfide amounts exceeded not reportedÉTo increase the pressure of the steam system and to reuce hydrogen sulfide generation, emergency steam and hydrogen sulfide shedding steps were initiated. Several units feed rates were reduced to minimum and some were shut down. As soon as acid gas was available steps were taken to restart the SRUs. For each restart operations pnnel followed standard operations procedures for startup and shutdown. When the storm water tanks began to overflow, steps were taken to remove slop oil from the tank dike using vacuum dikes. The feed rte of wastewater from the wastewater tanks to
Sulfur Dioxide: 203,217.0 pounds
Benzene: 7,863.0 pounds
Toluene: 51,003.0 pounds
Xylene: 91,154.0 pounds
Ethylbenzene: 15,408.0 pounds
Oil: 2,226,000.0 gallons

B-11 Flare
Cause: pilot light went out due to wind

Followup: No

Notes: this incident linked with incident Number 95930 of 05/05/2007


Outfall 006
Cause: see notes

Followup: No

Notes: A pinhole leak was discovered on a 3 inch slop oil line upstream of the 006 slide valve structure. Leak was isolated and repaired. Slop oil spilled on soil, heavy rains produced a slight sheen at 006. Booms, absorbent pads and vacuum truck were deployedto contain the sheen. >30 gallons emitted according to Verbal Report. DEQ report attached to CITGO letter indicates that 190 lbs were release
Slop Oil: 190.0 pounds

Wastewater Treatment Plant
Cause: heavy rainfall

Followup: No

Notes: Starting on 07/04/07 wastewater treatment plant began receiving storm water from all areas of the plant. Storm tank diversion valves were opened allowing storm water to flow into the concrete lined tank dikes.


Unit Stack Sulfur Dioxide Analyzer
Cause: heavy rainfall with extensive lightning; analyzer disabled by lightning strike

Followup: No

Notes: Letter mentions sulfur dioxide and hydrogen sulfide but does not cite emission of Sulfur Trioxide, which is listed in the attached verabl repor


004 Outfall
North Flare

Followup: No

Notes: See incident 08-06535
Under Investigation

Sulfur Dioxide: 244.0 pounds

B-11 Flare, B-12 Flare, Sulften Stack, C-Cat Scrubber,
Cause: Hurricane Ike

Followup: Yes

Notes: Power Failure causes release of huge amount of S02. Loss of Pecan Grove substation caused the loss of power to equipment in the SRU, Central Amine, cid Plant, Sour Water Stripper, Unicracker, Wastewater Treating and Coker II Units. Combustion efficiencyof 99% was used to calculate S02 emissions - is that an appropriate figure? Follow-up report on 10/27/2008 discusses emissions from B-11 Flare only REMEDIAL ACTIONS - perform feasability study of reliable power supply for acid block ; Install nsary equipment to start up JC-201 Compressor with less than RQ Flare Emissio
Sulfur Dioxide: 82,889.0 pounds

Hydrogen Sulfide: 798.0 pounds


Sulften Vent EQT297 ; Tail Gas II Stack EQT 298

Followup: No

Notes: Some pollutants released onto Highway, which was sealed off during clean up. 5.5 inches of rain in a 3 hour period led to depressurization in process units and various instrumentation problems; event met or approached the 25-year 3-hour intensity standard; Install three additional sumps, pumps, and associated piping in the steam trench to alleviate flooding during heavy ra
Hydrogen Sulfide: 133.0 pounds
Benzene: 93.0 pounds
Sulfur Dioxide: 1,000.0 pounds

Sheet Pile Wall
Cause: DEQ report states, "approximately 3-5 gallons of emulsified slop oil washed through the lifting holes in the sheet pilings that separates the lagoon from the ship channel. According to Diana LeBlanc (Environmental Engineer) with Citgo, the oil was released from the bottom of the lagoon when Morrison surveyors were profiling the bottom of the lagoon." High winds caused oil to be driven from the surface of the Indian Marais Lagoon, to the sheet pile wall where it escaped into the Calcasieu River.

Followup: No

Notes: Report states that "Citgo immediately deployed hard and absorbent booms to capture the oil on both sides of the sheet pilings. The water level was pumped down by Citgo and sent to the wastewater treatment area to prevent any additional spillage from the lagoon. ES&H was contracted by Citgo to assist in boom deployment and cleanup. Ms. LeBlanc said that written notification would be forthcoming when the investigation was complete."
Slop Oil: 3.0 gallons

A Cat unit (B-2, 6)
A Reformer (B 102-106)
A Reformer (B-101)
A Topper unit (B-4)
A-CGH unit (B 101-103)
Acid Plant
ALCOH unit (B 101-103)
B Cat unit (B-2, 6)
B Reformer (B 401-406)
B Topper unit (B-104)
B-CGH (B 201- 203)
BLCOH unit (B-101, 3)
BOH unit ( B 601,602)
C Cat unit (B-2, 6)
C Topper unit (B-1C, 2C)
Coker 1 unit
Coker 2 unit (B-201, 202)
CVEP unit (8101A, 81018, 8102A, 81028)
Feed Prep (B-101)
HP Boilers (8-1C, 8-1, 8-1A, B-2a, B-3c, 8-5A)
ISOM unit (B-801)
SRF Unit (B-5)
Sulfolane unit (B-201, 202)
Ultra Low unit (B-101, 102)
Unicracker unit (B-1,2,3,4,5)
Vacuum (8-2A, 8-201)
Cause: Due to a thunderstorm, a loss of electrical power from the Pecan Grove substation caused the shutdown of the Sulfur Recovery Unit (SRU), Central Amine, Acid Plant, Sour Water Stripper, Unicracker, Wastewater Treating and Coker II units. An incident investigation was initiated, scheduled to be completed June 10, 2011.

Followup: Yes

Notes: According to the second follow-up Refinery Letter, CITGO: 1) Contacted Entergy for power restoration 2) reduced refinery/unit charge rates Area was monitored and all parameters measured zero. Investigation to be completed by 6/10/2011. Report of regarding this investigation is not available.
Sulfur Dioxide: 159.0 pounds
Sulfur Dioxide: 768.0 pounds
Sulfur Dioxide: 3,169.0 pounds
Sulfur Dioxide: 63,701.0 pounds
Sulfur Dioxide: 7,921.0 pounds
Sulfur Dioxide: 5,055.0 pounds
Sulfur Dioxide: 303.0 pounds
Sulfur Dioxide: 474.0 pounds
Sulfur Dioxide: 4,999.0 pounds
Sulfur Dioxide: 18,174.0 pounds
Sulfur Dioxide: 4,037.0 pounds
Sulfur Dioxide: 2,176.0 pounds
Sulfur Dioxide: 5,445.0 pounds
Sulfur Dioxide: 294.0 pounds
Sulfur Dioxide: 571.0 pounds
Sulfur Dioxide: 307.0 pounds
Sulfur Dioxide: 824.0 pounds
Sulfur Dioxide: 441.0 pounds
Sulfur Dioxide: 2,191.0 pounds
Sulfur Dioxide: 1,862.0 pounds
Sulfur Dioxide: 2,073.0 pounds
Sulfur Dioxide: 689.0 pounds
Sulfur Dioxide: 9,080.0 pounds
Sulfur Dioxide: 11,091.0 pounds
Sulfur Dioxide: 3,922.0 pounds
Sulfur Dioxide: 6,762.0 pounds

Wastewater treatment unit
Cause: This incident involved a Benzene release associated with wastewater diversion CITGO's wastewater treatment plant. This wastewater diversion occurred as a result of a flash flood heavy rain event. CITGO diverted the wastewater into a concrete diked containment area surrounding the wastewater tanks. According to CITGO, the wastewater diversion was necessary to avoid overfilling of stormwater and equalization tanks. One of the WWTP Equalization Tanks (TK 310) had been out of service for inspection/maintenance going into the subject rainfall event.

Followup: No

Notes: Wastewater processing rates were maximized and material diverted to diked area was pumped to controlled storage as tankage became available. CITGO will be constructing a fourth wastewater storage tank as well as an additional API separator and aeration tank.
Benzene: 33.0 pounds
Xylene: 13.0 pounds
Ethylbenzene: 3.0 pounds
Toluene: 86.0 pounds