THE SAN ANTONIO REFINERY, LLC

Incident Narrative

ON JUNE 4, 2021, AT APPROXIMATELY 7:11AM, THERE WAS A RELEASE OF CRUDE FROM THE BOOSTER PUMP ON THE CALO, 8"" CRUDE PIPELINE. TSAR OPERATIONS PERSONNEL WERE NOTIFIED BY A CONTRACT VAC TRUCK OPERATOR THAT THERE WAS AN OIL LEAK IN THE SECONDARY CONTAINMENT. TSAR TERMINAL OPERATOR IMMEDIATELY SHUT IN THE AFFECTED PIPING AND MADE NOTIFICATION TO TSAR MANAGEMENT. ONCE THE SITE WAS MADE SAFE TSAR DISPATCHED MAINTENANCE PERSONNEL TO INSPECT THE PUMP TO DETERMINE WHAT HAPPENED AND TO MAKE REPAIRS AS NEEDED. A CONTRACT REMEDIATION CREW AND VAC TRUCKS WERE DISPATCHED TO THE LOCATION TO BEGIN REMEDIATION OF THE SITE. AFTER ASSESSMENT IT IS ESTIMATED THAT THERE WAS A RELEASE OF 1.67 BBLS. THE REMEDIATION WAS COMPLETED ON JUNE 4, 2021. THE REPAIRS WERE COMPLETED ON JUNE 4, 2021, AND IT WAS DETERMINED BY TSAR MAINTENANCE PERSONNEL THAT THE SEAL FAILED DUE TO NORMAL WEAR AND TEAR. THERE WERE NO OTHER ISSUES FOUND WITH THE PUMP AT THE TIME OF REPAIRS. THE PIPELINE WAS PUT BACK INTO SERVICE ON JUNE 4, 2021. THE RELEASE WAS DUE TO THE MECHANICAL FAILURE OF THE PUMP'S SEALS. THE SEAL WAS SENT TO JOHN CRANE FOR FAILURE ANALYSIS, AND THEY DETERMINED THAT THE MATING O-RING HAD SIGNIFICANT WEAR, THIS IS WHAT CAUSED THE RELEASE. THE SEALS ARE CONSIDERED WEAR AND TEAR PARTS AND CAN FAIL WITHOUT NOTICE. THERE WERE NO INDICATIONS OF THE SEALS PENDING FAILURE PRIOR TO THE RELEASE. THERE IS NO KNOWN MITIGATION TO PREVENT A COMPONENT THAT FAILS DUE TO NORMAL WEAR FOR IN-SERVICE CONDITIONS. TO MITIGATE FUTURE RE-OCCURRENCE, PUMPS WITH SIMILAR CONFIGURATIONS WERE VISUALLY INSPECTED AND NO ISSUES WERE NOTED.