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|State Police #||13-01718|
|Pollutant||Duration||Point Source||Greenhouse Gas||Criteria Pollutant||Ozone forming chemical||Amount of Release|
|Carbon Monoxide||6h||GO-1 Elevated Flare, FE-602||NO||YES||NO||2,343.7 pounds|
|NOx||6h||GO-1 Elevated Flare, FE-602||NO||NO||YES||430.7 pounds|
|Particulate Matter||6h||GO-1 Elevated Flare, FE-602||NO||YES||NO||81.1 pounds|
|Sulfur Dioxide||6h||GO-1 Elevated Flare, FE-602||NO||YES||NO||BRQ|
|Volatile Organic Compounds (VOCs)||6h||GO-1 Elevated Flare, FE-602||NO||NO||YES||640.0 pounds|
|Hexane||6h||GO-1 Elevated Flare, FE-602||NO||NO||NO||59.4 pounds|
Accident Classified As: Below Reportable Quantity (BRQ)
On April 20, 2013, GO-1 operations restarted compressor K5741 after planned maintenance was executed. During the restart event, GO-1 flared dry gas at the GO-1 Elevated Flare (EPN 1-90) until the dry gas met specification to be used feed in the unit. The GO-1 flaring resulted in no reportable quantities exceeded but a permit limit exceedence of 46.32 lbs of Hexane.
This incident was not preventable by Shell Chemical. Shell Chemical could not predict the failure of the compressor mechanical check valve.
The cause was a mechanical failure of the compressor check valve that required a dry gas compressor shutdown to repair. Once repairs were completed, dry gas must be flared until it meets specification to be used in the unit. An investigation determined the cause was the mechanical failure of the compressor check valve. This required a dry gas compressor shutdown to repair. Shell Chemical procedures require that the dry gas must be flared until it meets specification to be used in the unit.