Potential occupational health hazards present in modern airport operations were described, first as they relate to medical services for employees and for emergencies occurring at the airport, and second as they relate to the ongoing performance of the various types of jobs held by airport workers. In a survey of 41 businesses at the Denver Stapleton International Airport, only one company had medical facilities at the airport. A total of 2145 persons were employed by the other 40 businesses, some of which were affiliated with medical personnel, physicians or nurses who were sometimes present at the site. In the second part of the study, a survey was conducted of airport personnel, including office workers, warehouse and air freight personnel, cafeteria and kitchen employees, ramp workers, airport maintenance workers, baggage handlers, reservations personnel, air crew personnel, and aircraft maintenance personnel. Potential hazardous exposures were documented to include carbon- monoxide (630080), microwave ovens, noise, jet fuel gases, jet exhaust, x-radiation, cleaning and degreasing agents, ultrasonic cleaners, electroplating chemicals, metal oxide fumes, welding fumes, paints, epoxy resins, solvents, battery acids, mercury (7439976), and radar beams.