SOUTHERN NATURAL GAS CO

Incident Narrative

12/30/2016, 15:08, CITY OF TUSCALOOSA FIRE DEPARTMENT REPORTED A NATURAL GAS RELEASE TO SOUTHERN NATURAL GAS COMPANY (SNG) GAS CONTROL; 15:20, SNG TECHNICIAN CONFIRMED WITH SNG GAS CONTROL HE WAS IN ROUTE TO THE SNG TUSCALOOSA #1 METER STATION; CUSTOMER (ALAGASCO) TECHNICIAN ARRIVED AT SNG METER STATION AND AT 15:52 CUSTOMER (ALAGASCO) TECHNICIAN CONTACTED SNG GAS CONTROL AND CONFIRMED GAS VENTING FROM SNG METER STATION RELIEF VALVE; APPROXIMATELY 16:35 SNG TECHNICIAN ISOLATED FAILED REGULATOR, THE RELIEF VALVE THEN RESET; 16:41, SNG TECHNICIAN REPORTED TO SNG GAS CONTROL HE HAD ISOLATED THE REGULATOR AND VENTING OF NATURAL GAS WAS TERMINATED; INVESTIGATION FOUND OIL HAD ENTERED REGULATOR PILOT AND BODY OF REGULATOR WHICH CAUSED THE REGULATOR TO FAIL OPEN AS DESIGNED; THE RESULTING INCREASED PRESSURE CAUSED VENTING AT THE RELIEF VALVE; REGULATOR EQUIPMENT WAS CLEANED INTERNALLY AND REPAIRED BY REPLACING SOFT-GOODS; TUSCALOOSA #1 METER STATION WAS RETURNED TO SERVICE 12/31/2016, 00:04; DOCUMENTATION FROM THE CITY OF TUSCALOOSA FIRE DEPARTMENT NOTES THE FIRE DEPARTMENT CONDUCTED AN EVACUATION ON 51ST AVENUE; THIS EVACUATION WAS BASED UPON FIRE DEPARTMENT CRITERIA AND THEIR EVENT KNOWLEDGE AT THE TIME OF THE ALARM. THE DOCUMENTATION DOES NOT SPECIFICALLY IDENTIFY THE EVACUEES NOR DOES THE DOCUMENTATION PROVIDE THE EVACUATION POPULATION; ALL TIMES IN THIS REPORT ARE CST;