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Marathon Ashland Petroleum (3165), Garyville
LDEQ Accident Report
| Accident # | 134819 |
| State Police # | 11-06616 |
| Accident Date | 2011-10-22 |
| Report Date | 2011-10-28 |
| Follow-up Date | 0000-00-00 |
| Follow-up: | No |
Pollutants Released
| Pollutant | Duration | Point Source | Greenhouse Gas | Criteria Pollutant | Ozone forming chemical | Amount of Release |
| Methane | 48 h | Includes U21, U43, U55, U212, and U243 | YES | NO | YES | 2,282.0 pounds |
| Pentene | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | NO | 282.6 pounds |
| Hydrogen | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | NO | 590.6 pounds |
| Hydrogen Sulfide | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | NO | 0.1 pounds |
| Nitrogen | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | NO | 88.8 pounds |
| Sulfur Dioxide | 48 h | Includes U21, U43, U55, U212, and U243 | NO | YES | NO | 441.7 pounds |
| Carbon Monoxide | 48 h | Includes U21, U43, U55, U212, and U243 | NO | YES | NO | 4,634.5 pounds |
| Pentane | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | YES | 176.0 pounds |
| Isopentane | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | YES | 331.9 pounds |
| n-Butane | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | NO | 1,365.6 pounds |
| Isobutane | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | YES | 425.1 pounds |
| Propane | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | YES | 2,018.0 pounds |
| Ethane | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | YES | 2,272.1 pounds |
| cis-2-Butene | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | NO | 60.9 pounds |
| trans-2-Butene | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | NO | 16.3 pounds |
| 1-Butene | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | YES | 105.7 pounds |
| Propylene | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | YES | 137.1 pounds |
| Ethylene | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | YES | 172.9 pounds |
| Carbon Dioxide | 48 h | Includes U21, U43, U55, U212, and U243 | YES | NO | NO | 35.0 pounds |
| Oxygen | 48 h | Includes U21, U43, U55, U212, and U243 | NO | NO | NO | 7.7 pounds |
| Nitrogen Oxide | 48 h | Includes U21, U43, U55, U212, and U243 | NO | YES | YES | 850.1 pounds |
Accident Classified As: Reportable Quantity
Cause of Problem: Process Upset
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.
Discharge Preventable - Under Investigation
Not known at this time, the results of the incident investigation will determine whether or not this was preventable.
Notes/Remedial Actions
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.
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