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LDEQ Accident Number Accident Date |
Point Source(s) | Notes | Amount of Release |
No LDEQ Reported 2006-10-27 | Tail Gas Clean -up Unit (TGCU) - valves 101, 738 | Cause: possible heavy rain storm could have caused 738 to open due to a malfunction associated with heavy rain storm. Followup: No Notes: This accident was not preventable because it is the result of a malfunction of the 738 valve and a leak on the 101 valve. These failures were unexpected. Remedial measures - an investigation is ongoing and the appropriate follow up actions will be completed. Reportable quantities for sulfur dioxide were exceeded. | Sulfur Dioxide: 944.0 pounds |
91379 2006-10-16 | FLARE - #17 and #19 Flares | Cause: the cause of the flaring was high pressure in the refinery gas collection system due to a high volume of vent gas from the other refinery units. The source of the high vent gas rate was unable to be determined. Followup: No Notes: This incident was not preventable because the remedial actions were initiated before the flaring incident. These actions should have been sufficient to reduce vent gas rates. Two primary actions were initiated to reduce refinery vent gas rates. First, the compressor at the Hydrocracker was lined with the Refinery Gas Compression Unit Compressors to assist with processing refinery vent gas. Secondly, the crude feed rate to Pipestill #10 was decreased. Remedial Actions -an invgation is ongoing and the appropriate follow-up actions will be completed. The reportable quantity for nitrogen oxide has been exceeded. | Nitrogen Oxide: 10.0 pounds Hydrocarbon: 61.0 pounds Hydrogen Sulfide: 1.0 pounds Sulfur Dioxide: 228.0 pounds Nitrogen Dioxide: 2.0 pounds Butene: 2.0 pounds Propylene: 1.0 pounds |
87051 2006-04-08 | FLARE - C-30 and C-40 compressor | Cause: at the time of this report, the cause of the flaring incident was unknown and was under investigati Followup: No Notes: The only information provided is that the preventability of the incident had not been determined and was under investigation. Remedial Measures are listed the same way. The reportable quantities for nitrogen oxide were exceeded. | Hydrocarbon: 84.0 pounds Hydrogen Sulfide: 1.0 pounds Sulfur Dioxide: 315.0 pounds Butene: 3.0 pounds Propylene: 2.0 pounds Nitric Oxide: 14.0 pounds Nitrogen Dioxide: 2.0 pounds |
101635 2007-12-11 | Spill | Cause: Followup: Yes Notes: Line was removed from service. Line will be rerouted above ground to prevent future underground leaks. | Under Investigation |
99633 2007-09-20 | atmospheric release | Cause: Followup: Yes Notes: Unit depressurized immediately in accordance with emergency process. Investigation is ongoing, appropriate follow up will be complete | Hydrocarbon: 103,467.0 pounds Hydrogen: 1,402.0 pounds Benzene: 313.0 pounds n-Hexane: 778.0 pounds Cyclohexane: 65.0 pounds |
98706 2007-08-16 | air release | Cause: Followup: Yes Notes: Once detected regenerated caustic use at the wet gas scrubber was reduced and fresh caustic use was increased. This action reduced the potential for sulfide entrainment to the settling ponds. | Hydrogen Sulfide: 986.0 pounds |
95990 2007-05-08 | FLARE-Flare #5,20 | Cause: Followup: Yes Notes: Attempts were made to restart compressor and without success a back up compressor was started. Feed rates were reduced to stop flaring. | Nitrogen Oxide: 66.0 pounds Sulfur Dioxide: 4,659.0 pounds Methane: 57.0 pounds Ethane: 41.0 pounds Propane: 35.0 pounds |
94555 2007-03-10 | release on Water Clarification unit | Cause: Followup: Yes Notes: area was evacuated to prevent unathorize entry until release ended. | Benzene: 29.0 pounds |
104920 2008-04-21 | oil sheen in drainage ditch | Cause: under investigation Followup: Under Investigation Notes: report submitted by Exxon mobile stating that due to the high level of the Mississippi river the water flowed into the drainage ditch and some is breaking into the water surface. Responisibility has not been taken due to the high level of water and cannot be determined between Exxon Mobile and Honeywell. | |
102970 2008-02-10 | oil spill | Cause: Crude oil was discovered leaking from a low flow switch on a pump discharge line. The cause of the leaking switch is unknown at this time. Followup: Yes Notes: written report from Exxon Mobile surrounding oil spill incident stating other pollutants that had been released into the soil and their quantities. The pump was shut down and blocked to stop release of oil. A vacuum truck picked up pooled soil and soil remediation was initiated. Spill was located with in Anchorage Tank Farm in West Baton Rouge PArish. The low flow switch was removed and a blank was installed in its place. | Volatile Organic Compounds (VOCs): 596.0 pounds n-Hexane: 5.0 pounds Crude Oil: 113.0 gallons |
127418 2010-10-30 | Bleeder valve | Cause: Oil leaked into soil from a partially open bleeder. A full investigation is ongoing to discover the cause of this incident. Followup: No Notes: The bleeder was closed, plugged and more mitigations were added. Released exceeded LDEQ reportable quantity for oil to soil. | Oil: 646.8 gallons |
122756 2010-04-14 | no information given | Cause: There was a flash fire in Refinery Gas Compression Unit during routine compressor maintenance, per procedure, when the fire occurred. Root cause still under investigation.
Three people injured and were sent to a local hospital. Followup: No Notes: Area secured and compressor isolated. Exxon is working with OSHA to determine root cause to prevent recurrence. No information given about pollutants emitted. | |
128556 2011-01-10 | #1 East Debutanizer | Cause: There was a sulfur dioxide spike in the burner line that occurred on the #1 East debutanizer. An investigation is underway to determine the cause. Followup: No Notes: BRQ. LDEQ report states that the spike was believed to be greater than 500 lbs, over reportable quanity. In the refinery letter, Exxon Mobile states that only nine pounds of excess sulfur dioxide was released, which is BRQ. | Sulfur Dioxide: 9.0 pounds |
139744 2012-05-15 | FLARE: Flare #17 | Cause: The cause it unknown. Intermittent flaring on flare #17. Flaring for 10-20 minutes, stopped for 30 minutes, went on for 2 hours total. Followup: No Notes: The root cause of the flaring is under investigation. | |
139672 2012-05-12 | Flare #17 | Cause: Flare #17 experienced a lazy flame for a short duration. A detailed investigation is being conducted to determine the root cause of the intermittent lazy flame on flare # 17. Followup: No Notes: No RQ values were exceeded for hydrocarbon gas as a result of this event. | |
159804 2014-10-31 | No information given | Cause: Release occurred at the ExxonMobil refinery on 10/31/14. Initial calculations indicated a potential benzene reportable quantity exceedance. Though additional El Paso sampling and revised calculations, Exxon determined that no reportable quantities were exceeded. Less than ten pounds per day of benzene is being released as a result of this event. Followup: No Notes: | |
153521 2014-01-27 | Cause: On January 27, 2014 at approximately 4:08 PM, the compressor GLA-3X at the PCLA (a fluid catalytic cracking unit) unit experienced an unplanned shutdown, causing material to be released to the site's flare gas system. Preliminary investigation results indicate the shutdown was caused by a higher than normal concentration of condensable distillate in a level instrument chamber as a result of inadequate steam tracing. The excess liquid bridged between the chamber wall and the radar rod, resulting in a false high level reading which tripped the compressor. The incident is under investigation to determine the exact root cause. Followup: No Notes: Upon compressor shutdown, the level instrument was bypassed to mitigate a repeat event. The incident is under investigation to determine the exact root cause and to provide mitigating steps to prevent recurrence. | Sulfur Dioxide: 6,497.0 pounds Propylene: 137.0 pounds |
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