TEXOMA CRUDE OIL PIPELINE CO., LLC

Incident Narrative

05/26/2021 - SUPPLEMENTAL FINAL REPORT SUBMITTED DUE TO INVESTIGATION COMPLETE AND CLOSED. AFTER A SERIES OF BARRELS BEING UNACCOUNTED FOR AND PRESSURE DROPS IN THE SYSTEM REGIONAL MANAGER DISCOVERED OIL INSIDE SECONDARY CONTAINMENT OF TANK 2568 AT HEALDTON STATION. THIS DEADLEG LINE RUNS THROUGH THE SECONDARY CONTAINMENT OF TANK 2568 BETWEEN A CAP INSIDE THE TANK 2884 SECONDARY CONTAINMENT AND THE FLEX FLOW LINE. THE RELEASE WAS THE RESULT OF THE FLEX FLOW TIED TO THE C30 LOSING PRESSURE (<280 PSI) CAUSING OIL TO RUN TO THE RELIEF LINE. WHEN CONSTRUCTION WORK WAS DONE YEARS AGO, THE RELIEF LINE WAS NOT TIED TO A TANK, BUT SIMPLY TO THIS DEAD LEG. THUS, WHEN THE DROP IN PRESSURE CAUSED THE RELIEF, IT HAD NO WHERE TO GO BUT TO THIS DEAD LEG. THE LINE, BECAUSE OF LITTLE, IF ANY, USE OVER TIME WAS CORRODED. THREE (3) HOLES WERE FOUND AT 6 O'CLOCK ON THE PIPE. THE LARGEST HOLE WAS APPROXIMATELY THE SIZE OF A HALF DOLLAR. THE PIPE WAS APPROXIMATELY ONE (1) FOOT BELOW GROUND. IT IS ASSUMED THAT FREEZING CONDITIONS FOR 10 DAYS MAY HAVE HAD AN IMPACT ON THE PIPING, CONTRIBUTING TO THE CAUSE OF THE RELEASE. THE RELIEF LINE HAS BEEN REPLACED WITH NEW PIPE AND PROPERLY ROUTED TO TANK 2568. OCC INCIDENT NO. 18521OGDO30085 HAS BEEN RESOLVED BY R D WELCH ON 02-23-2021.