ENTERPRISE PRODUCTS OPERATING LLC — Gas transmission and gathering — incident on 2015-06-15

Gas transmission and gathering incident. Reported cause: CORROSION FAILURE. Reported consequences: 0 fatalities, 0 injuries, 4680 NATURAL GAS released, $563,000 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: 20150095.

Operator ID: 31618.

Reported incident date: 6/15/2015 15:00.

Cause detail: EXTERNAL CORROSION

Cause detail: CHEVRON PLATFORM OPERATORS DISCOVERED A PIN HOLE LEAK ON THE ENTERPRISE EXPORT PIPELINE RISER AT THE +6 FOOT ELEVATION LEVEL FROM THE GULF OF MEXICO WATER LINE JUST ABOVE A CLAMP SUPPORT. TOPSIDE VALVES AT SM 288 PLATFORM WERE CLOSED AND SUBSEA VALVES IN BLOCK SM 287 WERE CLOSED TO BLEED DOWN PIPELINE AND PIPELINE RISE TO ZERO PRESSURE. ENTERPRISE WAS NOT ABLE TO CLOSE SUBSEA VALVES IMMEDIATELY DUE TO TROPICAL STORM BILL AND WEATHER RELATED ISSUES. THE PLATFORM OPERATORS WERE EVACUATED UNTIL PIPELINE WAS ISOLATED. PIPELINE RISER REPAIR IS ON GOING WITH THE INSTALLATION A PRE-FABRICATED SECTION OF PIPELINE TESTED IN ACCORDANCE WITH 49 CFR 192 REGULATIONS. ONCE ALL WORK HAS BEEN COMPLETED, A 2 HOUR PRESSURE LEAK TEST OF THE PIPELINE AND PIPELINE RISER WILL BE PERFORMED. PIPELINE RISER REPAIRS WERE COMPLETED ON AUGUST 1, 2015.

PHMSA trend classification: significant incident, not serious.

PHMSA standardized cause: CORROSION — EXTERNAL.

PHMSA indexed costs: $576,000 reported total cost, $294,492.413 in 1984 dollars, $710,359.38 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.