ENTERPRISE PRODUCTS OPERATING LLC

Incident Narrative

SCADA LOW PRESSURE ALARM AT A PUMP STATION ALERTED OPERATION CONTROL (OC). OC SHUT OFF THE UPSTREAM PUMP, CLOSED THE REMOTELY OPERATED VALVE AT THE DOWNSTREAM PUMP STATION AND NOTIFIED FIELD PERSONNEL OF AN APPARENT LINE FAILURE. TWO AREA TECHNICIANS WERE DISPATCHED TO CLOSE THE VALVES BETWEEN THE PUMP STATIONS WHILE MONITORING FOR INDICATIONS OF A RELEASE. OC NOTIFIED NEARBY COUNTY SHERIFF DEPARTMENTS, KDHE, KDEM AND NRC. COUNTY EMERGENCY MANAGEMENT PERSONNEL REPORTED THE LOCATION OF AN UNCONTROLLED RUNOFF OF NATURAL GASOLINE TO A NEARBY CREEK. AREA TECHNICIANS RESPONDED BY CLOSING ADJACENT BLOCK VALVES. AERIAL OBSERVATION SPOTTED A SPILL CONTROL LOCATION IMMEDIATELY UPSTREAM OF THE CREEK INFLOW TO THE SOLOMON RIVER. A HAZ MAT RESPONSE TEAM INSTALLED A SPILL CONTROL MATERIAL WEIR, AND APPLIED ADDITIONAL BOOMS AND ABSORPTION MATERIAL TO CONTAIN RAPIDLY EVAPORATING GASOLINE. AS A PRECAUTIONARY MEASURE, 3 RESIDENCES WERE EVACUATED. A PRECISE COUNT OF NUMBER OF PEOPLE EVACUATED WAS NOT MADE BUT ALL WERE CLEARED TO RETURN TO THEIR HOMES THE DAY AFTER THE FAILURE OCCURRED. THE INITIAL NRC NOTIFICATION (CASE #937988) WAS FOLLOWED WITH A REVISED VOLUME RELEASE ESTIMATE UNDER CASE #937993. THE RELEASE VOLUME REPORTED IN PART A OF THIS REPORT IS A FURTHER REFINED RELEASE ESTIMATE FROM THE VOLUME METERED TO REFILL THE LINE AFTER THE REPAIR. AFTER THE AREA WAS MADE SAFE, THE LINE WAS EXCAVATED AND EXPOSED IN PRESENCE OF A PHMSA CENTRAL REGION INSPECTOR. THE LINE WAS THEN CUT AND REPAIRED WITH PRE-TESTED PIPE. THE FAILED PIPE WAS SENT TO KIEFNER AND ASSOCIATES FOR METALLURGICAL ANALYSIS. UNDER APPROVAL OF PHMSA CENTRAL REGION, THE LINE WAS RESTARTED ON APRIL 29 WITH A TEMPORARY 20% PRESSURE REDUCTION. SUBSEQUENT TO REVIEW OF THE METALLURGICAL RESULTS, A REVIEW OF SIX (6) ADDITIONAL LINE DIGS AND DETERMINATION OF CAUSE OF THE FAILURE, PHMSA CENTRAL REGION APPROVED REMOVING THE 20% PRESSURE REDUCTION. SHORTLY AFTER THE INCIDENT, APPROXIMATELY 100 SMALL FISH WERE FOUND DEAD IN ONE LOCATION ON COLE CREEK APPROXIMATELY 3/4 OF A MILE DOWNSTREAM FROM THE LEAK. ENVIRONMENTAL EVALUATION AND REMEDIATION HAS BEEN COMPLETED AND CLOSED BY KDHE. APPROXIMATELY 230 CUBIC YARDS OF SOIL WAS CONTAMINATED AND SUBSEQUENTLY REMEDIATED ON-SITE. REGARDING APPARENT CAUSE, A SEARCH OF ONE CALL TICKETS IN THE VICINITY OF THE RUPTURE DID NOT PRODUCE A ONE CALL TICKET AT THE LOCATION OF THE PIPE FAILURE, BUT THE POSSIBILITY OF PREVIOUS EXCAVATION DAMAGE COULD ALSO NOT BE EXCLUDED.