APSC PS 9, Release to Containment
- Time/Date of Incident
- Spill Number
- During a scheduled maintenance shutdown of the pump station, a loss of power to the power- distribution center resulted in a command circuit designation to open the system relief valve and close the station block valves. The block valves could not close without power, allowing oil to flow from the TAPS line into Tank 190, and then out the tank vents into lined secondary containment. An incident investigation team was assembled to determine the root cause, and the results are pending.