The Retlif North Carolina office has been relocated to 7140 Weddington Road, Suite 140, Concord, North Carolina, 28027 USA. Phone: 704 787 8474. The new facility is a 2,000 square foot industrial condo type design consisting of five individual office spaces and one large 1,000 square foot open area. Plans are for the location to be built out as a pre-compliance EMC laboratory are underway.