From the website:
District Offices Awendaw District Office 7200 Highway 17 North P.O. Box 340 Awendaw, SC 29429 1-800-327-9615 Goose Creek District Office 2 Springhall Drive P.O. Box 1549 Goose Creek, SC 29445 1-800-327-9615 Johns Island District Office 1135 Main Road