MEDALLION OPERATING COMPANY, LLC

Incident Narrative

AT APPROXIMATELY 09:30 ON MARCH 6, 2021, A MEDALLION OPERATOR DISCOVERED A SUSPECTED LEAK AT UPTON STATION. THE LEAK WAS CONFIRMED BY PERSONNEL ON LOCATION AND FLOW WAS SHUT DOWN FROM THE INCOMING PIPELINE AT APPROXIMATELY 09:50. AT APPROXIMATELY 10:30, MEDALLION RESPONSE PERSONNEL DETERMINED THE LEAK WAS COMING FROM BURIED 8IN RELIEF LINE. AT APPROXIMATELY 11:30, MEDALLION HAD THE RELIEF LINE ISOLATED AND CONTROL ROOM WAS ABLE TO SAFELY RESUME DELIVERIES FROM THE STATION. EMERGENCY ONE CALLS WERE MADE AND HYDROVAC EXCAVATION WAS USED TO UNEARTH THE 8IN RELIEF LINE. THE LEAK WAS FOUND AT THE 6 O'CLOCK POSITION, AND A PLIDCO CLAMP+SLEEVE (TYPE B SLEEVE) WAS INSTALLED AS A REPAIR TO THE LINE, AND THE FACILITY HAS RESUMED FULL NORMAL OPERATIONS AT APPROXIMATELY 14:30 MARCH 6, 2021. TO PREVENT RECURRENCE MEDALLION WILL INSTALL PIPING TO ALLOW FLUSHING CAPABILITIES TO PREVENT STAGNANT OIL IN THE RELIEF LINE BY JULY 15, 2021. THE INITIAL ESTIMATE OF THE RELEASED CRUDE OIL WAS 1.5 BBLS. DURING REMEDIATION ACTIVITIES, MEDALLION HAS DETERMINED THE RELEASED VOLUME TO BE APPROXIMATELY 30 BBLS. ALL 30 BBLS HAVE BEEN RECOVERED BY REMOVING FREE STANDING OIL AND EXCAVATION AND REMEDIATION OF AFFECTED SOIL. FURTHER REMEDIATION ACTIVITIES ARE ON HOLD, AS MEDALLION DETERMINES IF THE RELIEF LINE CAN BE TAKEN OUT OF SERVICE TO ALLOW A MEANS OF EXCAVATION OTHER THAN HAND DIGGING AROUND THE IN-SERVICE PIPING. REMEDIATION ACTIVITIES ARE ALSO EXPECTED TO BE COMPLETED BY JULY 15, 2021. ----------------- UPDATE(12/17/21): ALL REMEDIATION OF THE AFFECTED SOIL HAS BEEN COMPLETED. THE EXCAVATION ACTIVITIES RELATED TO THE REMEDIATION WERE MORE COSTLY THAN INITIALLY ESTIMATED AND THE TOTAL COST OF THE ACCIDENT EXCEEDED $50,000 DUE RECOVERING THE AFFECTED SOIL. NO TELEPHONIC REPORT WAS MADE TO NRC AS THE INITIAL COST WAS EXPECTED TO BE BELOW THE IMMEDIATELY REPORTABLE CRITERIA. AS A FURTHER MEANS TO PREVENT RECURRENCE, MEDALLION ABANDONED AND REMOVED THE 8 IN RELIEF LINE THAT WAS FOUND LEAKING. A NEW ABOVE GROUND SECTION OF PIPING WAS INSTALLED IN AUGUST 2021. IT IS DESIGNED TO ALLOW FLUSHING AND EXTERNAL VISUAL EXAMINATION TO MONITOR CORROSION.