GULF SOUTH PIPELINE COMPANY, LP — Gas transmission and gathering — incident on 2016-08-21

Gas transmission and gathering incident in QUITMAN, CLARKE County, MS. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 53804 NATURAL GAS released, $1,500 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: 20160075.

Operator ID: 31728.

Reported incident date: 8/21/2016 11:48.

Location detail: 4390+22

Cause detail: OTHER EQUIPMENT FAILURE

Cause detail: GAS CONTROL RECEIVED A SCADA UNACKNOWLEDGED ALARM FOR THE DESTIN COMPRESSOR STATION AND DISPATCHED OPERATIONS PERSONNEL TO INVESTIGATE. THE STATION DISCHARGE BLOW DOWN VALVE WAS OPEN AND SIDE GATE VALVES WERE OPEN AS WELL. STATION PERSONNEL ACTIVATED THE ESD SYSTEM IN ORDER TO CLOSE THE SIDE GATE VALVES AND STOP THE GAS RELEASE. 3-2-18 UPDATE PER PHMSA INSTRUCTION. *ON 8-21-16 AT 23:44 GAS CONTROL NOTIFIED ON-CALL PERSONNEL OF SCADA ALARM *ON 8-21-16 AT 23:55 PERSONNEL ARRIVED ONSITE *ON 8-22-16 AT 01:00 CRITERIA FOR REPORTING EVENT WAS MET *ON 8-22-16 AT 01:13 EVENT CEASED *ON 8-22-16 AT 01:44 NRC CALL WAS MADE 4-26-18 REVISED A19A TO REFLECT THE TIME WHEN SCADA ALARM WAS RECEIVED WHICH WAS ON 8-21-16 AT 23:40. PHMSA REQUESTED THAT WE CHANGE A4 TO THE TIME THE EVENT IS ESTIMATED TO HAVE RESULTED IN 3 MMCF OF GAS RELEASED; HOWEVER, WE DO NOT HAVE DATA TO SUPPORT CHANGING THIS TIME. 4-27-18 REVISED A4 USING CALCULATION GUIDANCE PROVIDED BY PHMSA.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: EQUIPMENT FAILURE — OTHER EQUIPMENT FAILURE.

PHMSA indexed costs: $148,846 reported total cost, $157,079.672 in 1984 dollars, $194,381.375 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.