KINDER MORGAN TEJAS PIPELINE — Gas transmission and gathering — incident on 2019-03-17

Gas transmission and gathering incident in PORT NECHES, JEFFERSON County, TX. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 5302 NATURAL GAS released, $7,000 reported property damage. Operator-reported incident data submitted to PHMSA, generally within 30 days. Records may be supplemented or corrected and do not represent final agency causal findings.

Report number: 20190043.

Operator ID: 4900.

Reported incident date: 3/17/2019 6:41.

Location detail: STATION 3+46

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: POST INCIDENT INVESTIGATION DETERMINED KM TEJAS SABINE COMPRESSOR STATION LOST COMMERCIAL AC POWER, 3/15/2019, AT 18:00 HOURS. FOLLOWING THE COMMERCIAL AC POWER FAILURE, THE COMPRESSOR STATION WAS PROVIDED ELECTRICAL POWER BY THE COMPRESSOR STATION UPS BATTERY SYSTEM. ONCE THE UPS BATTERY SYSTEM WAS DEPLETED, THE COMPRESSOR STATION WENT INTO ESD MODE AS COMPRESSOR STATION LOGIC IS PROGRAMMED FOR A COMPLETE POWER LOSS OCCURRENCE. 3/17/2019, 05:44-HOURS MOTIVA EMPLOYEE CALLED KM TEJAS GAS CONTROL CONCERNING A POSSIBLE EVENT�AT THE COMPRESSOR STATION SITE. 05:45-HOURS, ENLINK EMPLOYEE CALLED KM TEJAS GAS CONTROL BELIEVING KM TEJAS WAS TAKING NATURAL GAS FROM ENLINK. UPON THE COMPLETE LOSS OF POWER, THE COMPRESSOR STATION PLC SENT MISCELLANEOUS, INADVERTENT, AND INACCURATE STATUS AND SIGNALS THROUGH THE SCADA SYSTEM TO KM TEJAS GAS CONTROL. BECAUSE THE PLC WAS BLACKED-OUT, ALL COMPRESSOR STATION ALARMS AND COMPRESSOR STATION VALVE STATUS SEEN THROUGH SCADA DID NOT REFLECT ACTUAL COMPRESSOR STATION VALVE CONFIGURATIONS. ALSO UPON THE COMPLETE LOSS OF POWER, A VALVE IDENTIFIED AS FIREGATE 3 (FG-3), ONE OF THE COMPRESSOR STATION ESD ISOLATION VALVES, DID NOT CLOSE. THE OPEN VALVE FG-3 ALLOWED NATURAL GAS TO FLOW FROM CUSTOMER ENLINK THROUGH KM TEJAS METERS AND INTO THE COMPRESSOR STATION ESD SYSTEM THEREBY RELEASING ADDITIONAL NATURAL GAS TO ATMOSPHERE. NATURAL GAS VENTED UNTIL THE KM TEJAS EMPLOYEE ACCESSED THE COMPRESSOR STATION SITE BY ENTRY THROUGH MOTIVA PROPERTY SECURITY AND ARRIVED AT THE COMPRESSOR STATION SITE AT 07:20-HOURS AND CONFIRMED NATURAL GAS WAS VENTING AND MANUALLY CLOSED TWO (2) UPSTREAM VALVES ON THE METER RUNS TO TERMINATE THE NATURAL GAS RELEASE AT 07:35-HOURS. COMMERCIAL AC POWER WAS RESTORED TO THE COMPRESSOR STATION AND THE COMPRESSOR STATION RETURNED TO SERVICE AT 14:37-HOURS ON 3/17/2019. FOLLOWING THIS INCIDENT, KM TEJAS REPLACED VALVE FG-3 TO ENSURE VALVE OPERATION RELIABILITY. ALSO BY ELECTIVE CHOICE, KM TEJAS HAS INSTALLED LOSS OF AC POWER INDICATOR ALARMS IN THE COMPRESSOR STATION PLC SYSTEM.� THE TEXAS RAILROAD COMMISSION INCIDENT REPORT NUMBER FOR THIS INCIDENT IS #1958. THE NRC 48-HOUR UPDATE INCIDENT REPORT NUMBER FOR THIS INCIDENT IS #1240384. SUBMITTING AS FINAL WITH NO CHANGES.

PHMSA trend classification: not significant, not serious.

PHMSA standardized cause: EQUIPMENT FAILURE — MALFUNCTION OF CONTROL/RELIEF EQUIPMENT.

PHMSA indexed costs: $22,345 reported total cost, $18,904.63 in 1984 dollars, $27,551.435 in current-year dollars.

PHMSA trend flags, standardized causes, and indexed costs are analytical fields added to operator-reported incident data. They do not represent final agency causal findings.