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|State Police #||092368|
|Pollutant||Duration||Point Source||Greenhouse Gas||Criteria Pollutant||Ozone forming chemical||Amount of Release|
|Flammable Gas||2 minutes||Tank 528||NO||NO||YES||2,307.0 pounds|
Accident Classified As:
Tank 528 was filled with butane. Natural gas, used to displace butane in the barge was introduced into Tank 528. This was caused when a malfunctioning level indicator in the barge allowed the butane level to fall to a point where natural gas could enter the transfer line. The increase in pressure in Tank 528 tripped the pressure safety valve(PSV) causing flammable gas to be vented to the atmosphere.
Level indicator malfunctioned, failure could not have been foreseen.
Transfer line was blocked and head space pressure lowered.