National Institute for Occupational Safety & Health Current Intelligence Bulletin 54, June 1991:
Environmental Tobacco Smoke in the Workplace: Lung Cancer and Other Health Effects.
DEPARTMENT OF HEALTH AND HUMAN SERVICES
Centers for Disease Control and Prevention,
National Institute for Occupational Safety and Health
Recommendations p. 21:
We recommend eliminating tobacco from the casinos and implementing a smoking cessation program. The casinos should also eliminate smoking near building entrances and air intakes to protect employees from involuntary exposure to ETS. A physician should evaluate employees with respiratory symptoms, especially symptoms related to asthma that are associated with workplace exposures.