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Phillips 66 (2538), Lake Charles

Releases of Gas Mixture

LDEQ Accident Number
Accident Date
Point Source(s) Notes Amount of Release

external floating roof of Tank-7
tank-7 roof drain
Cause: External floating roof check valve failed, slowing tank contents on top of the roof. The incident resulted from a mechanical failure of a check valve. Tank material (gasoline/oil/water mix) got on top of floating roof allowing mixture to spill to ground via roof drain. Estimated 2bbls of oil to ground into secondary containment.


Notes: s13-22018 due to a damaged floating roof, gasoline released to containment. A notification was made regarding a release from the external floating roof of Tank-7 located in Area D Tank Farm. An estimated 2 barrels of a gasoline, oil, and water mixture was spilled to the ground through the roof drain within secondary containment. Evaporative losses from spill contained benzene and potentially H2S. Immediate area monitoring non-detect for H2S but detected for benzene. ESH personnel remediated the spill. Blocked roof drain to limit mixture spilling to ground. Drained material from roof but due to slow drain and rain, pump to be put roof top and pump material off floating roof. An estimated 7752 lbs of volatile organic carbons were released to the air exceeding the reportable quantity for VOCs. Fenceline monitoring was conducted for VOCs and Benzene and no offsite impact occurred. Material was cleaned up without any offsite impacts. Investigation will provide more specific cause(s) and any appropriate actions to prevent reoccurrence.
63.0 gallons