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Motiva Enterprises (1406), Norco

LDEQ Accident Report

Accident #157378
State Police #14-03065
Accident Date2014-07-13
Report Date 2014-07-17
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 30mButane-butylene reactor, emergency depressuring valveNOYESNO1,434.0 pounds
NOx11h 30mButane-butylene reactor, emergency depressuring valveNONOYES263.0 pounds
Particulate Matter11h 30mButane-butylene reactor, emergency depressuring valveNOYESNO50.0 pounds
Volatile Organic Compounds (VOCs)11h 30mButane-butylene reactor, emergency depressuring valveNONOYES954.0 pounds

Accident Classified As: Below Reportable Quantity (BRQ)

Cause of Problem: Equipment Failure

A malfunction of the solenoid on the emergency depressuring valve caused a release of butylenes and highly reactive volatile organic compounds from the OL5 Ground Flare (FG-101).

Discharge Preventable - No

From the refinery letter: "This incident was not preventable by Shell Chemical LB. The malfunction of the solenoid on the emergency depressuring valve was unexpected"

Notes/Remedial Actions

Shell Chemical confirmed that no reportable quantities were exceeded. However, the maximum permitted limits for carbon monoxide, nitrogen oxide and particulate matter were exceeded at the OL5 Ground Flare (FG-101). Solenoid was immediately replaced once the emergency depressuring valve was safely isolated from the process.