CENTERPOINT ENERGY GAS TRANSMISSION — Gas transmission and gathering — incident on 2013-02-28

Gas transmission and gathering incident in CONWAY, FALKNER County, AR. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 2689 NATURAL GAS released, $195 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: 20130024.

Operator ID: 602.

Reported incident date: 2/28/2013 15:08.

Location detail: CONWAY TB #2

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: THIS EVENT WAS REPORTED BECAUSE IT IS CONSIDERED TO BE SIGNIFICANT BY THE OPERATOR. CEGT BELIEVES THE EVENT IS SIGNIFICANT DUE TO EMERGENCY RESPONDERS EVACUATING 60 PEOPLE FROM A NEAR BY BUILDING (DAYCARE) TO ENSURE THEIR SAFETY. THERE WERE NO DEATHS, INJURIES OR A FIRE. THIS EVENT DID NOT HAVE A REPORTABLE LOSS OF GAS VOLUME AND HAD A MINIMAL REPAIR COST. THE METERING FACILITY INVOLVED FUNCTIONED PROPERLY AND AS DESIGNED. TRASH IN A SENSING LINE CAUSED THE REGULATOR TO OPEN AND BUILD PRESSURE IN THE MEASUREMENT STATION. THE SYSTEM RELIEF OPENED/BLEW AS IT WAS DESIGNED TO DO. CEGT TECHNICIANS ARRIVED AT THE LOCATION, CORRECTED THE ISSUES AND MADE THE AREA SAFE.

PHMSA trend classification: not significant, not serious.

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

PHMSA indexed costs: $2,208 reported total cost, $1,642.578 in 1984 dollars, $2,332.995 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.