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Shell Chemical East (26336), Norco

LDEQ Accident Report

Accident #152800
PDF AvailablePDF
State Police #13-05464
Accident Date2013-12-10
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 Monoxide11h 19mOL-5 Ground Flare (EPN 7-84) and Elevated Flare (EPN 6-84)NOYESNO588.8 pounds
Nitrogen Oxide11h 19mOL-5 Ground Flare (EPN 7-84) and Elevated Flare (EPN 6-84)NOYESYES108.2 pounds
Volatile Organic Compounds (VOCs)11h 19mOL-5 Ground Flare (EPN 7-84) and Elevated Flare (EPN 6-84)NONOYES248.4 pounds
Particulate Matter11h 19mOL-5 Ground Flare (EPN 7-84) and Elevated Flare (EPN 6-84)NOYESNO43.0 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.