MARATHON PIPE LINE LLC

Incident Narrative

ON 2/18/19 AT 09:05 CST, AN UNCONTROLLED CRUDE RELEASE OF 430 BARRELS OCCURRED WHEN A CONTRACTOR PERFORMING MAINTENANCE FOR MPL CAUSED DAMAGE TO THE PIPELINE NEAR WINGANON, OKLAHOMA, ON THE CUSHING TO ROXANA OZARK 22 INCH PIPELINE SYSTEM. ALL WORK ACTIVITIES WERE CEASED, THE SYSTEM WAS SHUT DOWN AND EMERGENCY RESPONDERS WERE DISPATCHED. FIELD TECHNICIANS CLOSED BLOCK VALVES ON BOTH THE UPSTREAM AND DOWNSTREAM SIDES OF THE RELEASE. RESPONSE CONTRACTORS ARRIVED ONSITE WITH VAC TRUCKS AND FRAC TANKS AND IMMEDIATELY BEGAN REMOVING OIL FROM THE EXISTING EXCAVATION. ADDITIONAL EXCAVATIONS WERE COMPLETED TO ENSURE THE MATERIAL WAS FULLY CONTAINED AT THE RELEASE SITE AND TO ENSURE THE SAFETY OF THE PUBLIC, RESPONDERS AND PROTECTION OF WATERWAYS. AFTER COMPLETE CONTROL OF THE RELEASE SITE WAS OBTAINED, ADDITIONAL DRAIN-UP OF 1350 BARRELS WAS COMPLETED TO ALLOW PERSONNEL TO ENTER THE EXCAVATION SAFELY TO MAKE REPAIRS. NINETY SEVEN PERCENT OF THE RELEASE VOLUME WAS RECOVERED, WITH THREE PERCENT ATTRIBUTED TO EVAPORATION. INVESTIGATION HAS DETERMINED THE CAUSE TO BE EXCAVATION DAMAGE. AN EXCAVATOR MADE CONTACT WITH A VERTICAL ACCESS PIPE CAUSING DAMAGE TO A 3/4-INCH PIPE NIPPLE CONNECTED TO A 10-INCH AUXILIARY PIPE. NRC 48-HOUR UPDATE CALL MADE ON 2/20/19 AT 08:27 CST REPORT # 1238126 4/8/19 SUPPLEMENTAL- UPDATED COSTS (PART D) 5/3/19 FINAL - UPDATED COSTS (PART D)