MAGELLAN CRUDE OIL PIPELINE COMPANY, L.P.

Incident Narrative

WHILE PERFORMING THE DAILY FACILITY INSPECTION, AN OPERATOR DISCOVERED A SEAL LEAK ON THE TANK 1228 MIXER. THE TANK WAS NOT IN USE AT THE TIME OF THE INCIDENT. ADDITIONAL OPERATIONS PERSONNEL RESPONDED TO ISOLATE THE MIXER SHAFT TO STOP THE LEAK. THE RELEASE WAS CONTAINED AND CLEANUP OPERATIONS COMMENCED. ALL SIMILAR MODEL MIXERS, JENSON 650 MODELS, WERE POWERED DOWN AND REMAIN OUT OF SERVICE UNTIL THE CAUSE HAS BEEN FURTHER INVESTIGATED. PRELIMINARY INVESTIGATIONS INDICATE THE LEAK MAY HAVE BEEN CAUSED DUE TO A LACK OF SPRING TENSION ON THE SEAL FACE. THE SEAL WAS REMOVED AND SENT TO THE MANUFACTURER FOR ADDITIONAL INVESTIGATION. UPDATE 2/4/19: INVESTIGATION AND ANALYSIS INDICATE A POSSIBLE LACK OF EVENLY DISTRIBUTED TENSION AROUND THE SEAL FACE FROM THE MULTIPLE SPRINGS MAY HAVE CONTRIBUTED TO THE LEAK. A NEW SEAL DESIGN WAS CREATED AND INSTALLED ON THE MIXER ON 1/31/2019. ADDITIONAL SEALS HAVE BEEN ORDERED TO REPLACE THE SEALS ON OTHER MIXERS OF THE SAME MAKE/MODEL AT THIS LOCATION. SUPPLEMENTAL/FINAL (02/11/2019): UPDATED PART G6-6 ADDITIONAL FACTORS AND PART H NARRATIVE.