SFPP, LP

Incident Narrative

THE STATION OPERATOR DISCOVERED A LEAK ON THE LS-105 24"" EAST SURGE LINE W1 NEAR TANK W-1 MANIFOLD VALVE. AT THE TIME OF THE DISCOVERY WATSON WAS SUPPLYING THE EAST TUBE FROM TANK W-16 (JET FUEL). THE EAST SURGE LINE WAS THEN DRAINED AND THE PRODUCT POOL NEAR THE W-1 VALVE WAS PULLED BACK INTO THE SURGE LINE. AT THIS TIME, THERE APPEARS TO BE AN ISSUE WITH THE EAST SURGE LINE BELOW GRADE NEAR THE W-1 EAST SURGE LINE VALVE, AS THE LEAK APPEARED TO ORIGINATE AT THE VALVE STEM AT A BOLTED CONNECTION. AN INVESTIGATION INTO THE FAILURE AND CAUSE OF THE LEAK IS STILL PENDING AND FUTURE SUPPLEMENTAL REPORT WILL PROVIDE A CAUSE. UPDATE 6/24/2020 FOR SUPPLEMENTAL/FINAL SUBMISSION - AFTER MULTIPLE FAILURE ANALYSIS EVALUATIONS, AND A THOROUGH REVIEW OF ALL AVAILABLE INFORMATION AND DATA, THE INVESTIGATION CONCLUDED THAT THE PROBABLE FAILURE OF THE HYDRAULIC CONTROL BLOCK INTERNAL RELIEFS RESULTED IN EXCESS PRESSURE APPLIED TO THE VALVE DURING ACTUATION. THIS RESULTED IN THE DAMAGE TO THE VALVE BONNET BOLTS AND ALLOWED THE BONNET TO SEPARATE FROM THE VALVE BODY. THIS COMBINED WITH THE DAMAGE TO THE VALVE SLIPS AND SEALING SURFACES PROVIDED A FLOW PATH FOR PRODUCT TO RELEASE FROM THE VALVE.