SUNOCO PARTNERS MARKETING & TERMINALS LP

Incident Narrative

ON 12/21/18 AT APPROXIMATELY 23:07 OIL WAS DISCOVERED FLOWING INTO THE TANK CONTAINMENT DIKE FROM THE ROOF DRAIN PIPE. ROOF DRAIN VALVE WAS BLOCKED IN TO STOP THE RELEASE. THE RELEASE WAS FULLY CONTAINED WITHIN THE DIKED AREA AND ALL FREE PRODUCT WAS RECOVERED VIA VACUUM TRUCK AND CONTAMINATED SOIL REMOVED FOR ON-SITE REMEDIATION. NRC WAS CONTACTED AS A PRECAUTIONARY MEASURE DUE TO UNKNOWN TOTAL COSTS AT THE TIME AND REPORT 1233756 WAS ISSUED. IT WAS DETERMINED THAT NO NRC REPORTING CRITERIA UNDER 195.52 WAS MET SO REPORT WAS NOT REQUIRED. UPON EXAMINATION AN AREA OF EXTERNAL CORROSION PINHOLES WERE FOUND ON THE ROOF. THE PINHOLES ALLOWED WATER TO ENTER THE PONTOONS WHICH RESULTED IN THE SLIGHT SINKING OF THE ROOF ON THAT SIDE. ONCE THE ROOF BEGAN TO SINK, IT ALLOWED OIL TO ENTER THE PONTOONS AND FILL THEM. AS THE PONTOON FILLED THE OIL PUSHED UP THROUGH THE PINHOLES THAT ALLOWED THE WATER ENTER. AS THE OIL PUSHED OUT OF THE PINHOLES, IT FOUND ITS WAY TO THE ROOF DRAIN AND THAT ALLOWED THE OIL TO EXIT THE ROOF DRAIN AND INTO THE DIKE. THE ROOF HAS SINCE BEEN CLEANED AND THE EXTERNAL CORROSION HAS BEEN REPAIRED.