COLONIAL PIPELINE CO

Incident Narrative

ON 3-13-15 AT 16:50 (AFTER RESTARTING KANNAPOLIS STATION LINE 2 FOLLOWING MAINTENANCE) A GASKET FAILED ON THE VALVE BODY OF THE UNIT 4 DISCHARGE VALVE RESULTING IN DIESEL FUEL BEING RELEASED INTO THE STATION YARD. THE STATION WAS SHUT DOWN AND ISOLATED. THE OPERATIONS MANAGER WAS NOTIFIED IMMEDIATELY AND CONTAINMENT AND CLEAN-UP ACTIVITIES COMMENCED. THE OUTLET VALVE TO THE SUB-SURFACE MANIFOLD YARD DRAIN OIL/WATER SEPARATOR WAS CLOSED IMMEDIATELY FOLLOWING THE RELEASE. FREE PRODUCT WAS COLLECTED FROM HAND-DUG RECOVERY PITS AND THE OIL/WATER SEPARATOR. AN ESTIMATED 220 CUBIC YARDS OF SOIL WAS IMPACTED BASED ON SPRAY AREA AND DEPTH OF PRODUCT SEEPAGE. THERE WAS NO IMPACT TO THE GROUNDWATER, SURFACE WATER, OR THE FACILITY POND. SINCE THE SPILL WAS GREATER THAN 25 GALLONS, THE NORTH CAROLINA DENR WAS NOTIFIED AT 19:47. A NOTIFICATION OF DISCHARGE FORM WAS ALSO SUBMITTED TO NCDENR MOORESVILLE OFFICE ON MARCH 16, 2015 VIA EMAIL. THE INITIAL VOLUME ESTIMATE OF THE RELEASE IS 920 GALLONS (620 GALLONS OF FREE PRODUCT RECOVERED AND 300 GALLONS IN IMPACTED SOIL). ALL RELEASED PRODUCT WAS RECOVERED OR IS CONTAINED IN SOIL ON COLONIAL PROPERTY. SOIL WILL BE TRANSPORTED TO SOILWORKS, INC. FOR DISPOSAL. RECOVERED PRODUCT/WATER WAS TAKEN TO HERITAGE-CRYSTAL CLEAN FOR TREATMENT AND RECYCLING/DISPOSAL. FINAL VOLUME OF RELEASE WILL BE DETERMINED ONCE ANALYTIC RESULTS ARE AVAILABLE. A CALL WAS PLACED TO NRC ON 3-16-15 BASED ON THE FACT THAT THE ESTIMATED COST OF THE INCIDENT WOULD LIKELY EXCEED $50,000. THE MAINTENANCE BEING PERFORMED ON THE DAY OF THE RELEASE INCLUDED REMOVAL OF AN OUT OF SERVICE PUMP (LINE 2, UNIT 4) AND REMOVAL OF VALVE OPERATORS ON THE UNIT 4 SUCTION AND DISCHARGE VALVES. A SPOOL PIECE WAS USED TO REPLACE THE PUMP AND THE VALVE OPERATORS ON THE UNIT VALVES WERE REMOVED AND REPLACED WITH BONNET BLINDS. THE GASKET BETWEEN THE VALVE BODY AND BONNET BLIND ON THE UNIT 4 DISCHARGE VALVE WAS THE COMPONENT THAT FAILED. AN INCIDENT ANALYSIS IS PLANNED. AFTER THE INCIDENT, A DECISION WAS MADE TO REMOVE BOTH THE UNIT 4 SUCTION AND DISCHARGE VALVES FROM THE STATION LOOP. THIS WORK WAS COMPLETED ON MARCH 15TH. UPDATE: ON AUGUST 6TH, THE LAST OF THE CONTAMINATED SOIL WAS EXCAVATED. 415 TONS OF SOIL WAS EXCAVATED CONTAINING 245 GALLONS OF PRODUCT. 725 GALLONS OF FREE PRODUCT WERE RECOVERED AFTER THE RELEASE. A TOTAL OF 970 GALLONS WERE RELEASED, AND WERE RECOVERED DUE TO THESE CONTINUED EFFORTS.