DOMINION ENERGY SOUTH CAROLINA, INC.

Incident Narrative

ON JUNE 19, 2020, AT APPROXIMATELY 5:00 PM LOCAL TIME, IN OKATIE, SC, A SEVERE THUNDERSTORM WITH HIGH WINDS CAUSED TWO TREES TO FALL ONTO THE HWY 46 VALVE STATION. THE DAMAGE SEVERED AN ABOVE-GROUND 2-IN STEEL STRAINER ON THE VALVE STATION. IT IS ESTIMATED THAT APPROXIMATELY 6996.1 MCF OF NATURAL GAS WAS LOST DURING THE LEAK. THE LEAK WAS STOPPED AT APPROXIMATELY 9:42 PM, AND TEMPORARY REPAIRS WERE MADE TO THE STATION. DURING THIS TIME OKATIE HWY (SC HWY 46) WAS CLOSED IN BOTH DIRECTIONS. THE INITIAL NRC INCIDENT REPORT NUMBER WAS 1280381. ON, JUNE 26, 2020 A FOLLOW-UP REPORT WAS MADE TO THE NRC TO GIVE CORRECTIONS TO THE INFORMATION CAPTURED IN THE ORIGINAL NRC REPORT (#1280485). THE STATION WAS PLACED INTO SERVICE IN 2016. AFTER THE INCIDENT OF JUNE 19, 2020. AN ENGINEERING COST ANALYSIS WAS PERFORMED FOR THE STATION AND IT WAS DETERMINED THAT THE STATION IS NO LONGER NEEDED FOR SYSTEM RELIABILITY. THUS THE PRELIMINARY PLAN IS TO RETIRE THE STATION. A NEW STATION MAY BE CONSTRUCTED AT THE LOCATION IF FUTURE OPERATIONAL NEEDS REQUIRE IT.