PUBLIC SERVICE CO OF NORTH CAROLINA

Incident Narrative

ON JULY 2ND DOMINION ENERGY OF NC RECEIVED AN ODOR CALL AT 5111 DAFFODIL LANE IN CONCORD. DENC FIRST RESPONDER ARRIVED AT THE SCENE AT 5:51PM AND DETERMINED THAT THIS WAS AN UNDERGROUND DAMAGED MAIN OR SERVICE. SUBSEQUENTLY, RESPONDING DENC OPERATIONS AND MAINTENANCE PERSONNEL DISCOVERED THAT THE MAIN WAS LEAKING IN SEVERAL LOCATIONS ALONG 500-FOOT LONG COMMUNICATIONS CONDUIT BORE PATH. GAS WAS BLOWING IN IN THE ROADWAY AND DUE TO SAFETY CONCERNS THE VOLUNTEER FIRE DEPARTMENT DECIDED TO CUT OFF THE 4"" PLASTIC VALVE OFF LOCATED ABOUT 100' UPSTREAM FROM THE DAMAGED AREA. THE MAIN WAS DAMAGED BY DIRECTIONAL BORE IN MULTIPLE LOCATIONS. THE DAMAGED AREAS WERE NOT EXCAVATED DUE TO THE PROXIMITY OF THE MAIN IN RELATION TO OTHER UTILITIES, ROAD AND SIDEWALKS. THE DECISION WAS MADE TO REPLACE THE ENTIRE SECTION ON THE OTHER SIDE OF THE ROAD. THE MAIN WAS A ONE-WAY FEED AND A TEMPORARY BY-PASS WAS INSTALLED TO SUPPORT THE DOWNSTREAM CUSTOMERS UNTIL THE REPLACEMENT MAIN COULD BE INSTALLED. THE WORK ON THE BY-PASS EXTENDED INTO JULY 3RD AND THE DOWNSTREAM SYSTEM WAS PLACED BACK INTO SERVICE. 147 DOWNSTREAM CUSTOMERS HAD TO BE RESTORED. THE FINAL AND PERMANENT REPLACEMENT OF THIS SECTION OF MAIN HAS BEEN COMPLETED AND THE COSTS ARE INCLUDED IN THIS REPORT. LOCATING MARKS FOR THE NATURAL GAS MAIN THAT WERE PRESENT AT THE SCENE WERE DETERMINED TO BE OUTSIDE OF THE TOLERANCE ZONE. ROOT CAUSE OF INCIDENT IS INACCURATE FACILITY MARKING. THE LOCATE WAS PERFORMED BY DOMINION ENERGY'S THIRD-PARTY LOCATER ON JUNE 24TH. NOTE: PART C, QUESTION 5 - THE MAIN WAS DAMAGED BY DIRECTIONAL BORE IN MULTIPLE LOCATIONS. THE DAMAGED AREAS WERE NOT EXCAVATED DUE TO THE PROXIMITY OF THE MAIN IN RELATION TO OTHER UTILITIES, ROAD AND SIDEWALKS, THEREFORE, ACCURATE DIMENSIONS OF THE DAMAGED AREAS COULD NOT BE DETERMINED. THE DECISION WAS MADE TO REPLACE THE ENTIRE SECTION ON THE OTHER SIDE OF THE ROAD. LDF-309434