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Shell Chemical East (26336), Norco
LDEQ Accident Report
| Accident # | 152800 |
| State Police # | 13-05464 |
| Accident Date | 2013-12-10 |
| Report Date | 2013-12-17 |
| 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 |
| Carbon Monoxide | 11h 19m | OL-5 Ground Flare (EPN 7-84) and Elevated Flare (EPN 6-84) | NO | YES | NO | 588.8 pounds |
| Nitrogen Oxide | 11h 19m | OL-5 Ground Flare (EPN 7-84) and Elevated Flare (EPN 6-84) | NO | YES | YES | 108.2 pounds |
| Volatile Organic Compounds (VOCs) | 11h 19m | OL-5 Ground Flare (EPN 7-84) and Elevated Flare (EPN 6-84) | NO | NO | YES | 248.4 pounds |
| Particulate Matter | 11h 19m | OL-5 Ground Flare (EPN 7-84) and Elevated Flare (EPN 6-84) | NO | YES | NO | 43.0 pounds |
Accident Classified As: Below Reportable Quantity (BRQ)
Cause of Problem: Process Upset
On December 10, 2013, OL-5 operations experienced high acetylene content in the process. The material was flared to prevent further upsets which may have resulted in an even greater amount of flaring. OL-5 made adjustments to return the acetylene content back to specification. The OL-5 converter hydrogen appears to have been slipping a small amount of flow through a closed control valve into the hydrogen line supplying the acetylene converters causing the off specification production.
Discharge Preventable - No Information Given
Notes/Remedial Actions
OL-5 is making changes in process guidelines to prevent recurrence. Shell Chemical confirmed that no reportable quantities were exceeded, however the maximum lbs/hr limit was exceeded for particulate matter.
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