Worker exposures to ethylene-dibromide (106934) (EDB) and general work conditions were investigated at the Ethyl Corporation (SIC- 2869) in Magnolia, Arkansas, from June 14 to 16, 1977. A total of 15 personal air samples were collected from the control room operator, crew leader, loader, and laboratory technician stations during three work shifts. The company provided preemployment and annual medical examinations, monitored and analyzed personal air samples, and conducted quarterly hygiene surveys. A safety committee met regularly. All EDB concentrations were below the current OSHA threshold limit of 20 parts per million. The authors conclude that existing controls are adequate to maintain the current Federal standard. The greatest potential for EDB exposure is found in the general laboratory area and during tank car loading. The authors recommend improved techniques for sample preparation and storage, a closed filling system, additional respiratory protection, and ventilation at quality control sampling processes.