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|State Police #||09-01300|
|Pollutant||Duration||Point Source||Greenhouse Gas||Criteria Pollutant||Ozone forming chemical||Amount of Release|
|Benzene||2h5m||control valve of HCE compressor||NO||NO||YES||69.0 pounds|
|Toluene||3 h 35 m||WILA tanks #8 and 9||NO||NO||NO||9.5 pounds|
|Ethylbenzene||3 h 35 m||WILA tanks #8 and 9||NO||NO||YES||0.1 pounds|
|Napthalene||3 h 35 m||WILA tanks #8 and 9||NO||NO||YES||1.7 pounds|
|Isoprene||3 h 35 m||WILA tanks #8 and 9||NO||NO||YES||0.1 pounds|
|Cyclohexane||3 h 35 m||WILA tanks #8 and 9||NO||NO||YES||0.5 pounds|
Accident Classified As: Reportable Quantity
The release was caused by the failure of a control valve downstream of the HCE compressor. The control valve downstream of the HCE compressor failed to close which caused the HCE compressor to trip off.
The incident occurred as a result of an unexpected failure of a control valve.
Since there was no outlet for the vapor in the HCE system, the pressure built in the tanks until the pressure vents lifted, released hydrocarbon to the atmosphere. The back up hydrocarbon emissions control system which uses vacuum jets to recover the excess vapors was comissioned. Proper operation of the vacuum jets was confirmed shortly thereafter. The control valve and instrumentation will be repaired and inspected before being returned to servvice.