WILLIAMS FIELD SERVICES

Incident Narrative

OPERATOR PERSONNEL REPLACED OUTBOARD SEAL ON P-100 LOCATED AT MCDONALD PS COUPLE HOURS PRIOR TO ACCIDENT OCCURRING. THE SEAL WAS REPLACED DUE TO INDICATION OF THE PRIMARY SEAL LEAKING. REPLACEMENT PACKING WAS IN LONG TERM STORAGE. ROOT CAUSE OF FAILURE WAS CONFIRMED TO BE IMPROPER MAINTENANCE WHICH LEAD TO DEGRADATION OF THE PUMP SEAL. 14:57 LOCAL TIME PIPELINE CONTROL RECEIVED AN ALARM NOTIFICATION OF A FIRE DETECTOR SHUTDOWN ALARM, WHICH AUTOMATICALLY SHUTS ISOLATION VALVES TO/FROM THE MAINLINE AND SHUTS OFF PUMPS SUCH THAT PRODUCT SOURCE WAS PREVENTED TO THE FIRE PATH. FIRE WAS CONFIRMED BY SITE CAMERA AT 14:59. AT APPROXIMATELY 15:40 PM LOCAL OPERATIONS WAS ON-SITE AND STOOD BY WITH LOCAL FIRE DEPARTMENT AWAY FROM SCENE UNTIL A WORK PLAN COULD BE DECIDED. THE INITIAL PLAN WAS TO LET THE FIRE BURN OUT AND CONTINUE TO MONITOR LINE PRESSURES ON SYSTEM, AT 15:55 IT WAS DETERMINED THAT THE THERMAL CHECK VALVE WAS LEAKING BY SLIGHTLY AND THE PUMP LOOP PRESSURE WAS NOT DROPPING AS EXPECTED. DUE TO THE LACK OF ISOLATION PATH TO THE THERMAL CHECK VALVE AND THE SITE CONDITION WAS SATISFACTORY FOR PERSONNEL ENTRY SITE ENTRY WAS DECIDED ONCE A SAFE WORK PLAN WAS DEVELOPED AND APPROVED. ENTRY TO SITE WAS MADE AT 19:00PM TO CLOSE THE ISOLATION VALE TO THE CHECK VALVE, LIGHT FLARE, AND OPEN PATH TO FLARE. AT 20:49PM FIRE WAS PUT OUT AS ALL PRODUCT WAS CONSUMED TO FLARE. STATION WAS PUT BACK INTO SERVICE 8/26 11:00AM LOCAL TIME. SECOND REDUNDANT PUMP (P-200) WAS PUT INTO SERVICE 8/30/23 10AM LOCAL TIME. P-100 STILL OUT OF SERVICE.