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Placid Refining (2366), Port Allen

Releases of Isoprene

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

drain valve

Cause: On May 23, 2014 water and alkylate (a gasoline blending component) was discovered around the parameter of Placid's above ground tank number 16. The tanks floating roof drain valve was found to be leaking. The valve was blocked in to stop the leak and cleanup of approximately four barrels of alkylation and water was conducted. On May 24, 2014 additional alkylate was discovered and further investigation revealed the tank developed a small leak from a bottom side wall. Air pumps were set up to capture and pump the leaking alkylate to storage. A water heal of approximately 6 inches was pumped into the bottom of tank 16 to prevent product from leaking while the tank was de-inventoried. Area air monitoring was conuducted for LEL, VOCs, and benzene. On May 25, 2014 at approximately 10:00 hours the floating roof on tank 16 landed. De-inventorying continued until 18:00 hours when low suction was lost. The remaining product and water was removed (stripped) via air pumps. On May 26, at 9:30 hours the stripping was completed and a third party vendor began a controlled vapor degassing of the tank using a thermal oxidizer. On May 29, cleaning the floor of any residual sludge began so the tank could be inspected for needed repairs. Additionally, evaluation of any contaminated soil will also be addressed and the tank will remain out of service until repairs are completed. Report states that while the reason for the leak is still under investigation, it is expected to be corrosion related.

Followup: No

Notes: Release materials was recovered and returned to storage. Potentially impacted soil will be evaluated upon entry into the tank. A water heal was added to the tank, the tank was de-inventoried and degassed. Product was recovered and returned to storage. Soil to be tested and removed if contaminated. Air pumps captured leaking Alkylate.
0.4 pounds