SFPP, LP

Incident Narrative

ON 9/21/18 AT 20:57, WHILE DOING HIS SHIFT INSPECTIONS, AN OPERATOR AT CONCORD NOTICED THE LEAK SENSOR ON TANK CC-9 BLINKING. ON FURTHER INVESTIGATION, HE NOTICED AN ODOR OF DIESEL AND FOUND THAT THE SUCTION/DISCHARGE LINE ON THE TANK WAS WET, AND THERE WAS STAINING IN THE SUMP PIT AREA (NOT ENGINEERED CONTAINMENT) UNDERNEATH THE TANK. THE TANK WAS DRAINED DRY AND INVESTIGATED INTERNALLY. TWO CRACKS WERE SUBSEQUENTLY DISCOVERED IN THE SUMP AREA WHERE FILL LINES ENTER THE SUMP. THE REPAIR TO THE CRACKS ENTAILED REPLACING A SECTION OF STEEL THAT WAS CUT OUT AND HAVING THE SUMP WALLS REINFORCED. UPDATE FOR SUPPLEMENTAL/FINAL 4/16/19-AN INTERNAL INVESTIGATION CONCLUDED THAT THE CRACKS THAT FORMED AS A RESULT OF INADEQUATE STANDARDS OR DESIGN CRITERIA AS THE LOCATION OF THE SUMP UMBRELLA/DEFLECTOR SUPPORTS WELDED TO THE BOTTOM PLATE NEAR THE SUMP WALL SECURING THE UMBRELLA/DEFLECTOR WERE INSTALLED TO CLOSE, A RESULT OF POOR DESIGN. DUE TO THE FUNCTIONALITY OF TYPICAL BREAKOUT TANKS INCLUDING INCOMING FLOW RATES, AND HIGH TURNOVER RATES, THESE UMBRELLA/DEFLECTORS RECEIVE SIGNIFICANT STRESS FROM CONSTANT NORMAL OPERATING PROCEDURES. 09/30/2024 - UPDATED BY PHMSA PER OPERATOR APPROVAL.