COLONIAL PIPELINE CO

Incident Narrative

ON 04/06/2020 AT 18:20 THE CONTROL ROOM RECEIVED A HIGH SUMP ALARM AT OXFORD STATION, AND A TECHNICIAN WAS CALLED OUT. WHEN THE TECHNICIAN ARRIVED HE PUMPED THE SUMP AND THEN CHECKED STATION. THE TECHNICIAN FOUND PRODUCT FLOWING INTO THE TATTLETALE BOX AND THEN OBSERVED PRODUCT TRICKLING OUT OF THE TOP OF THE LINE 1 UNIT 1 DISCHARGE VALVE. THE TECHNICIAN MOVED THE VALVE AND THE LEAKING STOPPED. TECHNICIAN NOTIFIED THE CC AND THE OM. THE DO AND DEM WERE SUBSEQUENTLY NOTIFIED. THERE WAS A 12 INCH BY 12 INCH STAIN IN THE GRAVEL AT THE VALVE AND PRODUCT IN THE NEARBY ACCESS WELLS. CLEAN UP BEGAN IMMEDIATELY. REPAIR IS BEING PLANNED. DURING CLEAN UP ACTIVITIES ON 4/09/20 IT WAS ESTIMATED THAT THE COST OF CLEAN UP ACTIVITIES WOULD LIKELY EXCEED THE $50,000 THRESHOLD SO THE NRC NOTIFICATION WAS MADE AT 14:31 (REPORT #1275115). A COURTESY NOTIFICATION WAS MADE TO ALABAMA EMERGENCY MANAGEMENT (JANE SMYTH) ON APRIL THE 9TH AT 13:09 CDT. AN ADDITIONAL COURTESY NOTIFICATION WAS MADE TO ADEM'S GROUNDWATER BRANCH (TIM YOUNG) ON APRIL 13TH 13:37 CDT. CLEAN UP OF FREE PRODUCT AND SOIL REMOVAL IS COMPLETE. DURING THE RESPONSE EFFORT, 90 GALLONS OF FREE PRODUCT WAS COLLECTED AS WELL AS 2,265 GALLONS OF PCW. ADDITIONALLY, 63 TONS OF SOIL WAS REMOVED FOR DISPOSAL, CONTAINING A CALCULATED 43 GALLONS OF PRODUCT. FINAL RELEASE VOLUME ESTIMATE IS 133 GALLONS. THE INCIDENT ANALYSIS DETERMINED THAT DEBRIS HAD BEEN DEPOSITED ON THE STEM INTERNAL FROM THE O-RING, THEN RODE THE STEM THROUGH THE O-RING, DAMAGING THE O-RING OVER DECADES OF SERVICE UNTIL THE O-RING EVENTUALLY FAILED.