COLONIAL PIPELINE CO

Incident Narrative

ON THURSDAY SEPTEMBER 7, 2017 AT 08:00 CST A COLONIAL TECHNICIAN PERFORMING A FACILITY CHECK OBSERVED STAINED GRAVEL IN THE AREA OF THE LINE-2 UNIT #3 DRAIN VALVE. AFTER FURTHER INVESTIGATION PRODUCT WAS FOUND IN AN ACCESS WELL LOCATED BESIDE THE UNIT #3 DISCHARGE VALVE. IMMEDIATELY AFTER DISCOVERING THE PRODUCT, AT APPROXIMATELY 08:08, THE TECHNICIAN COMPLETED THE REQUIRED INTERNAL NOTIFICATIONS. AFTER ADDITIONAL RESOURCES ARRIVED ON SITE AND CONDUCTED FURTHER INVESTIGATION, PRODUCT WAS ALSO DISCOVERED IN THE FACILITY OIL/WATER SEPARATOR AND A NEARBY FACILITY MONITORING WELL. THE SYSTEM CONTROLLER SHUTDOWN AND ISOLATED THE STATION AT 10:08. RESPONSE PERSONNEL ON SITE EVALUATING THE SITUATION AND THE POTENTIAL LEVEL OF EXPLORATORY EXCAVATION IT COULD TAKE TO FIND THE PRODUCT SOURCE DEEMED THAT THE INCIDENT COST MIGHT EXCEED $50,000. THEREFORE, THE DECISION WAS MADE TO COMPLETE THE NRC NOTIFICATION AND THE REPORT WAS FILED AT 16:23. HYDRO EXCAVATION OF THE SUSPECTED LEAK AREA PROMPTLY IDENTIFIED THE LEAK SOURCE TO BE A PINHOLE WITHIN THE FACILITY 4 INCH PIPE DRAIN SYSTEM. AS A TEMPORARY REPAIR UNTIL A FINAL REPAIR SOLUTION IS DETERMINED, A PLIDCO CLAMP WAS INSTALLED. ALL FREE STANDING PRODUCT AND CONTAMINATED SOIL WAS CLEANED UP THE STATION WAS RESTARTED 18:31. THERE WERE NO REQUIRED NOTIFICATIONS FOR STATE AND/OR LOCAL AGENCIES, ALTHOUGH A COURTESY NOTIFICATION WAS MADE TO THE MDEQ. JANUARY 2018 SUPPLEMENT REPORT PROVIDES UPDATES TO THE FOLLOWING: PART A, 9 AND 11: UPDATED RELEASED AND RECOVERED VOLUMES. PART D, 3: YES TO LONG TERM IMPACT ASSESSMENT PERFORMED OR PLANNED. PART D, 4: YES TO ANTICIPATED REMEDIATION. PART D, 5 AND 5(A) AND 5(B): ADDED WATER CONTAMINATION AND SPECIFIED GROUNDWATER AND VOLUME. PART D, 8: REVISED COST ESTIMATES BASED ON MOST CURRENT INFORMATION. PART E, 2: CORRECTED MOP A FINAL REPORT WILL BE SUBMITTED WITHIN 30 DAYS FOLLOWING THE COMPLETION OF THE INCIDENT ANALYSIS. FINAL REPORT UPDATE: INCIDENT ANALYSIS WAS COMPLETED AND APPROVED ON 2 MAY 2018. NO ADDITIONAL INFORMATION DETERMINED ON APPARENT CAUSE. THE PLIDCO CLAMP HAS BEEN APPROVED AS THE FINAL REPAIR.