DOMINION ENERGY SOUTH CAROLINA, INC.

Incident Narrative

SUPPLEMENTAL REPORT CREATED TO CHANGE A4 TO 12:09 P.M. WHEN THE DAMAGE WAS DONE. ON NOVEMBER 22, 2021, AT APPROXIMATELY 12:09 P.M., DOMINION ENERGY SOUTH CAROLINA (DESC) GAS OPERATIONS RESPONDED TO A NOTIFICATION FROM A THIRD PARTY CONTRACTOR CONCERNING A NATURAL GAS LEAK NEAR 301 EL BETHEL ROAD IN CONWAY, SC. THE CONTRACTOR WAS PERFORMING A DIRECTIONAL DRILLING OPERATION TO INSTALL A WATER LINE PARALLEL TO THE DESC 6-INCH PLASTIC GAS MAIN. THE BORING CONTRACTOR HAD PROPERLY NOTIFIED SC811 AND THE GAS FACILITIES WERE ACCURATELY LOCATED AND MARKED. THE CONTRACTOR PERFORMED THE BORE, AND WHILE PERFORMING THE PULL BACK, THE BORING EQUIPMENT DRIFTED OFF THE ORIGINAL BORE PATH INTO THE NATURAL GAS LINE, CAUSING A LEAK. DESC OPERATIONS CREWS WERE ABLE TO ISOLATE THE LEAK AT APPROXIMATELY BY OPERATING TWO ISOLATION VALVES. NO CUSTOMERS' GAS SERVICE WAS LOST AND THE LEAK GARNERED AND NO MEDIA COVERAGE. THE DAMAGED GAS MAIN REQUIRED EXTENSIVE REPAIRS AND A NEW GAS MAIN WAS INSTALLED. THE TOTAL COST OF THE REPAIR WAS APPROXIMATELY $156,189, WHICH EXCEEDED THE REPORTABLE THRESHOLD OF $122,000. LDF: 322718