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Valero (1238), Meraux
Causal Factor: Other
| LDEQ Accident Number Accident Date |
Point Source(s) | Notes | Amount of Release |
| 99867 2007-09-29 | None Reported | Cause: Murphy experienced a supply problem with their purchased natural gas. This caused the flaring incident. Followup: No Information Provided Notes: In the Murphy report, this incident is listed as odor, this was natural gas form Embride (unscented gas). In the LDEQ report, it explains that Murphy experienced a supply problem with their purchased natural gas and this caused a flaring incident. This incident was reported by several citizens but not by Murphy. It is a continuation of incident 9986 | |
| 99828 2007-09-28 | FLARE - the episode resulted from a valve misalignment involving the uncommanded closure of the SCOT inlet control valve, which triggered the unit's automatic Safety Instrumented Shutdown process. A root cause analysis concluded that a loose wir | Cause: the episode resulted from a valve misalignment involving the uncommanded closure of the SCOT inlet control valve, which triggered the unit's automatic Safety Instrumented Shutdown process. A root cause analysis concluded that a loose wire tripped the fuse supplying power to the valve solenoid Followup: No Information Provided Notes: This incident was not preventable because the loose wire occurred despite inspections made during routine maintenance and operator rounds. Remedial Measures - MOUSA is actively working to install redundant solenoids on this critical valve. SEE LDEQ reports # 99867, 9986 | Sulfur Dioxide: 23,988.0 pounds |
| 95731 2007-04-28 | Heat Exchanger in the Distillate Hydrotreater (DHT) Unit | Cause: weld failure- release came from a small hole in the side of a heat exchanger in the Distillate Hydrotreater (DHT) Unit. Followup: No Information Provided Notes: There is no information as to whether this incident was preventable or not. Remedial Measures -the distillate hydroeater was removed from service and the exchanger was sent off for failure evaluation. The exchanger is scheduled to be repaired and returned to the plant in about 10 days. At that time, the Distillate Hydroeater will be returned to service. | Flammable Gas: 431.0 pounds Hydrogen Sulfide: 53.0 pounds |
| 109460 2008-09-22 | FLARE - Boiler Feed Water Pump B-P-022A | Cause: the event was apparently triggered by the loss of boiler feed water pump B-P-022A due to high bearing temperatures after loss of cooling water to the bearing housing. The lack of water was due to plugging (Zebra mussels) of the cooling water line. MOUSAhad the pump on a temporary cooling line (once-through cooling water from the Mississippi River) because the Area 6 Cooling Tower was shut down on 9/21 due to a planned maintenance turnaround of the Hydrocracker Unit. Followup: Yes Notes: This incident was not preventable because MOUSA could not anticipate that the temporary cooling line would plug. Remedial Measures - for future events when the Area 6 cooling tower is shut down, MOUSA will run B-P-022B on conditioned city water. Subsequent to this event, MOUSA installed connections to enable the use of a temporary cooling tower to supply high quality cooling water if the conditioned city water is unavailable. | Sulfur Dioxide: 8,842.0 pounds |
| No LDEQ Reported 2008-02-26 | Tank 200-7 9EQT 0042, Source ID 200-7) | Cause: see notes Followup: No Information Provided Notes: This was a report from Murphy sent to the LDEQ. Murphy Oil is submitting this notification of an emissions exceedance in an amount greater than a reportable quantity according to Louisiana Air Emission Permit General Condition R of the Title V OperatingPermit No. 2500-00001-V2. On feb. 26, 2008, MOUSA determined that the No. 6 Oil stored in Tank 200-7 (EQT 0042, Source ID 200-7) at the Meraux Refinery had a Reid Vapor Pressure of approximately 2 psi from Feb. 26th through 29th. The emissions calcuons for Tank 200-7 and the River Dock Loading (EQT 0059, Source ID 5-88) based on this observation are included as an attachment to this notification. Based on the calculations attached, the RQ's of volatile organic compounds (not otherwise liste | |
| 102027 2008-01-03 | FLARE - #3 Sulfur Recovery Unit Incinerator stack (EPN: 5-00) | Cause: excess emissions of sulfur dioxide occurred at the #3 SRU Incinerator stack due to a malfunction of the #3 SRU. The malfunction, a flameout in the #3 SRU TGTU Tail Gas Burner, resulted in an automatic TGT bypass. The MCR (Master Control Relay) connections were checked because and analysis of the Triconex output indicated a probable loose connection. A loose connection was found and repaired. Followup: No Information Provided Notes: This was a self report to LDEQ with a follow-up report both from Murphy. The incident was not preventable because the loose connection was not a predictable human event. Remedial Measures - MOUSA inspected the unit and found a loose connection at the #48 terminal in the Master Control Relay for the #3 SRU. MOUSA tightened the connection and set up a Preventable Maintenance work order to inspect all critical relay connections during the next planned unit shutdown. | Sulfur Dioxide: 123.0 pounds |
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