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Marathon Ashland Petroleum LLC, Garyville
Releases of Ethane
| LDEQ Incident Number Incident Date |
Point Source(s) | Notes | Amount of Release |
| 80326 2005-07-06 | UTLX Railcar No. 910150 | Cause: There was a leak in the sample valve of UTLX Railcar No. 910150. Followup: Yes Notes: The MAP technician who discovered the leak attempted to tighten the valve but this just led to valve remaining open and inoperable. This event is currently under investigation. Water was sprayed on the railcar. | 0.2 pounds |
| 77730 2005-03-19 | Distillate Hydroteating Unit | Cause: Leaking thermowell Followup: No Notes: Called inspector who found the leak; built encapsulation clamp; Report makes estimated leaks in pounds even though discharge was in drops | 1.0 pounds |
| 105380 2008-05-05 | South Flare (EQT 160 / EIQ 69-74) | Cause: Pinhole leak discovered in overhead propane line in Unit 22. Line was depressurized to flare. Followup: Notes: Blocked in line and depressured to South Flare. Incident under investigation. | 0.6 pounds |
| 119673 2009-11-23 | kerosene hydrotreater unit | Cause: During start-up of the kerosene hydrotreater unit (KHT), a bleeder valve o a piperack outside the unit was inadvertently left open, releasing gas into the atmosphere. Followup: Yes Notes: the line was isolated, and the valve was closed. | 0.8 pounds |
| 115394 2009-06-01 | Unit 15 HGO hydrotreater | Cause: Pin-hole leak in unit 15's hot separator overhead fin fan. Followup: Yes Notes: Fin fan was blocked in and tube isolated. | 55.2 pounds |
| 115023 2009-05-16 | Platformer Debutanizer Trim Cooler, #1 Cooling Tower EQI: 61a-74 | Cause: A high LEL was found at the #1 cooling tower, operations started checking for leaks and found that the debutanizer overhead trim cooler, 12-1309, was leaking hydrocarbons into the cooling water. Leak caused by under deposit corrosion. Followup: Yes Notes: The debutanizer trim cooler was isolated and leaking tubing plugged. | 36.9 pounds |
| 112752 2009-02-14 | No information given No information given. | Cause: No RQs were exceeded so no information is given Followup: Yes Notes: No RQs were exceeded so no information is given | |
| 121884 2010-03-03 | Gas pipe in Unit 43 Fuel Gas System | Cause: Condensate gas was leaking through a pin hole in a piping nipple in the Unit 43 Fuel Gas System. Gas was released to air. Followup: Notes: BRQ. Report states the line was isolated and the line depressurized so that leak could be repaired. This spill did not reach a reportable quantity. A clamp was installed around the pipe nipple to prevent future release at the site. Original report identifies release as compressed flammable gas. Later reports break down release into - HRVOCs, VOCs, Ethane, Methane, and H2. | 13.9 pounds |
| 121645 2010-02-22 | FLARE: coke drum overhead line; 205-PC-1511-V2; north flare | Cause: Water from the offline coke drum overhead line was inadvertently sent to the Main Fractionator, vaporized and overpressured the wet gas compressor suction drum causing 205-PC-1511-V2 to open to the North Ground Flare. Released into air. FLARE. Followup: No Notes: RQ. 2548 lbs of Sulfur Dioxide, 15 lbs of Nitrogen Oxides, 6.8 lbs of Hydrogen Sulfide, 21.5 lbs of Highly Reactive Volatile Organic Compounds (HRVOCs), and 31.7 Volatile Organic Compounds (VOCs). LDEQ report states that "this incident is an area of concern with regards to LAC 33:III.905." Remedial Actions: Cut charge on 205 Coker due to Fractionator pressuring problem and removed ROSE Pitch from unit. Put ROSE unit on internal circulation. Relieved to flare. | |
| 121169 2010-01-30 | Unit 34 Sulfur Recovery Unit (EQT FUG037) | Cause: "While switching unit 34 tailgas from the Unity 34 Thermal Oxidizer to the Unit 20 Thermal Oxidizer, Unit 34 pressured up causing acid gas to back out of the low range air blower vent valve in Unity 34."
Reportable quantity for Hydrogen Sulfide exceeded. Followup: No Notes: RQ. Reportable quantities were exceeded during this incident; detailed emissions report included. Refinery report states that "tailgas [was] switched back to the Unit 34 Thermal Oxidizer which corrected the problem immediately." | 1.6 pounds |
| 120620 2010-01-15 | South Ground Flare (EQT 0284) | Cause: New Naphtha Hydrotreating Unit relief valve failed--opened intermittently at lower pressures than it was supposed to and sent stream to flare. Discovered problem thanks to citizen complaint re: the smell.
Reportable quantity for SO2 exceeded.
Duration given below is an estimate; emissions were intermittent from 1758 hrs to 2215 hrs. Followup: No Notes: RQ. Faulty valve taken out of service & sent for repairs. RQ. Detailed release calculations attached to refinery letter. | 5.7 pounds |
| 134819 2011-10-22 | Includes U21, U43, U55, U212, and U243 | Cause: On 10/21/11 the Propane Shipping Pump, 63-1537-01, was shutdown due to vibration problems which limited propane throughout the refinery. Operations made moves to cut charge rates and lined up the propane to the fuel gas system. Intermittently flared from Units 21, 43, 55, 212, and 243. No known off site impacts. Incident investigation is being conducted to determined the why the incident occurred. Followup: No Notes: Opened 21P6431C, sweet fuel gas valve to flare to reduce pressure on fuel gas header and lower the level in 43-1202 (3:22am -4:09 am) bullet. Unit 63 shutdown propane shoppin pump, 63-1537-01, and U22 & U222 propane was routed to the bullet, 21HC6431 sweet fuel gas valve opened to the south flare from (8:21 am - 3:30pm). Fuel Gas Mix Drum 243-PC-0180B opened to flare due to Unit 205 sending excess propane to fuel gas header. Valve opened intermittently during this time from (11:15 am- 4:28pm) not opened above 10%. C3 propane from Domains 1 and 9 in refinery fuel gas causing high fuel gas pressure and 43PC5355 opened to flare three times (11:20am-11:30am), (11:53am-12:20pm), (12:45pm-1:05pm). Unit 55 Flare sweet refinery fuel gas from C3 propane in RFG Domain 1 and 9, 10/22/11 (11:28 am -3:55pm), 10/22/11 (7:42pm)- 10/23/11 (4:07am). An incident investigation will result in recommendation items designed to prevent the recurrence of this event. Values for carbon monoxide and nitrogen oxides do not match the sum of the daily reports. They are higher than the sum of the reportable values. | 2,272.1 pounds |
| 133997 2011-09-16 | Unit 259 North Ground Flare | Cause: On 9/16/11, level transmitted 205-LC-2050 failed which resulted in the filling of the Unit 205 C3/C4 Overhead Drum. This caused a pressure increase in the C3/C4 Splitter that led to the opening of the relief valve, 205-PSV-7077. This valve is routed to the flare header and the North Ground Flare. Followup: No Notes: The unit vessel levels were manually adjusted to stop the over-pressure condition. The level transmitter, 205-LC-2050, was repaired. An incident investigation is ongoing. C3/C4 Splitter Overhead leaked for 20 min. Report says the leak lasted 10 min but the release lasted 20 min. | 0.1 pounds |
| 132152 2011-06-30 | Unit 59 North Flare | Cause: The pressure relief valve on the unit 232 rich amine flash drum failed. Material in the flash drum was depressured by flaring until the relief valve would have closed. Leaking release valve and sour water stripper. Material was sent to Unit 59 North Flare (EQT# 0162 and EIQ# 83-74) Followup: No Notes: The flash drum was allowed to depressure to the flare until the relief valve would have close and the valve could be repaired. an incident investigation will result in recommendation items designed to prevent the recurrence of this event. | 0.2 pounds |
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