Division of Spill Prevention and Response


Incident Description
Location KPL Dock, Nikiski, Alaska
Product/Quantity Tesoro estimates approximately 1 barrel (42 gallons) of Vacuum Tower Bottom Blend (VTBB) was spilled. VTBB is a residual oil product that is not processed at the Tesoro refinery. VTBB has a thick consistency, similar to asphalt.
Cause Tesoro’s twenty-inch transfer line failed. The line was not pressurized to transfer product at the time of the discharge but contained residual VTBB. The exact cause of the line failure is being investigated by Tesoro personnel.
Time/Date of Incident Tesoro discovered the spill at 11:30 a.m., December 15, 2005.
Situation Reports
12/15/2005 (PDF 76K) -- FINAL  
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