GUARDIAN PIPELINE, LLC — Gas transmission and gathering — incident on 2017-12-31

Gas transmission and gathering incident in CHANNAHON, WILL County, IL. Reported cause: EQUIPMENT FAILURE. Reported consequences: 0 fatalities, 0 injuries, 26600 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: 20180019.

Operator ID: 31712.

Reported incident date: 12/31/2017 20:47.

Location detail: 0.00

Cause detail: MALFUNCTION OF CONTROL/RELIEF EQUIPMENT

Cause detail: AT APPROXIMATELY 20:46 ON DECEMBER 31, 2017, THE GUARDIAN PIPELINE GAS CONTROLLER ON DUTY IDENTIFIED A POSSIBLE ISSUE.. THE ONEOK FIELD REPRESENTATIVE WAS CONTACTED AND ARRIVED AT THE JOLIET STATION AT APPROXIMATELY 21:47 AT WHICH TIME GAS WAS FOUND BLOWING FROM THE BLOW DOWN ON THE UNIT #1 COMPRESSOR. GAS CONTROL WAS CONTACTED AND THE COMPRESSOR UNIT WAS SHUT DOWN. THE FIELD REPRESENTATIVE LOCATED A FROST BALL ON ONE OF THE SUPPLY FITTINGS, THAWED THE SUPPLY LINE, RETIGHTENED THE FITTING, AND THE VALVE CLOSED. UNIT 1 WAS THEN RETURNED TO NORMAL SERVICE.

PHMSA trend classification: significant incident, not serious.

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

PHMSA indexed costs: $100,300 reported total cost, $95,098.568 in 1984 dollars, $116,947.68 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.