GULFSTREAM MANAGEMENT & OPERATING SERVICES,LLC — Gas transmission and gathering — incident on 2018-05-26

Gas transmission and gathering incident in FORT MEADE, POLK County, FL. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 9229 NATURAL GAS released, $0 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: 20180058.

Operator ID: 31565.

Reported incident date: 5/26/2018 21:35.

Location detail: STATION 6+65

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: 5/26/18 21:19 - TIGER BAY FLOW WENT TO 0 21:31 - TIGER BAY HIGH DISCHARGE PRESSURE ALARM WHICH APPEARED TO BE DUE TO METER SHUTTING IN AS IT DOES EACH NIGHT. 21:35 - THE RELIEF LIFTED DUE TO SLOW LOCKUP ON THE REGULATORS. TIGER BAY ALARM CLEARED AND NO ADDITIONAL ALARMS WERE RECEIVED, EVERYTHING APPEARED NORMAL. SCADA BEGAN TO SEE A FLOW RATE OF 43000M RATE WHICH APPEARED TO CONTINUE NOM OF 38,999M. THE FAILURE OF THE RELIEF TO RESEAT CAUSED THE REGULATOR/CONTROL VALVES TO OPEN IN ORDER TO MAINTAIN THE PRESSURE. 5/27/18 01:34 - MACCUNNINHAM WITH DUKE ENERGY TIGER BAY CONTROL ROOM CALLED WILLIAMS CONTROL CENTER NOTIFYING OF RELIEF VALVE RELEASING GAS INTO THE ATMOSPHERE 01:39 - WILLIAMS TECH WAS NOTIFIED OF THE INCIDENT AND WAS ON ROUTE TO METER STATION TO INVESTIGATE AND GATHER ADDITIONAL INFORMATION 02:27 - WILLIAMS TECH ARRIVED AT THE LOCATION AND CONFIRMED GAS VENTING TO ATMOSPHERE THROUGH RELIEF VALVE AND CLOSED DESIGNATED VALVES TO SHUT IN FLOW 02:52 - WILLIAMS TECH CONFIRMED SOC WAS GIVEN ALL RELATED INFORMATION AND WILL MAKE EXTERNAL NOTIFICATIONS AS NECESSARY. 05/29/18 REPAIRED FAILED REGULATOR BOOT AND RESEATED RELIEF VALVE

PHMSA trend classification: not significant, not serious.

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

PHMSA indexed costs: $26,200 reported total cost, $24,374.498 in 1984 dollars, $30,046.155 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.