Which of the following approaches is indicated for protecting against lead dust?

To effectively protect against lead dust, the use of exhaust ventilation and enclosure is essential. This approach not only helps to control the spread of lead dust particles but also provides a safe working environment by containing the dust within a specific area. Exhaust ventilation works by extracting contaminated air from the workspace and reducing the concentration of lead dust, while enclosures prevent dust from contaminating adjacent spaces, therefore minimizing exposure risks.

In contrast, increasing ventilation alone may not sufficiently remove lead dust particles and could potentially disperse them. Surgical masks focus on personal protection and can provide a degree of safety but do not address the dust in the environment itself. Proper removal of all paint can help eliminate the primary source of lead dust but does not actively manage and protect workers during the process of removal or other lead-related activities. Thus, exhaust ventilation and enclosure represent a comprehensive and proactive approach to managing lead dust hazards in the environment.