Which interim control method involves keeping surfaces clean and free from lead dust?

The choice that involves keeping surfaces clean and free from lead dust is specialized cleaning. This method is crucial in managing lead hazards, particularly in environments where lead-based paint or dust may be present. Specialized cleaning includes practices such as wet cleaning surfaces, using HEPA vacuums, and ensuring that cleaning materials do not spread lead dust to other areas.

Contrarily, encapsulation refers to sealing lead paint surfaces to prevent lead exposure. Time-limited rehabilitation involves performing repairs or renovations with the expectation that they will be temporary, and replacement means removing and discarding lead-containing materials altogether. While these methods can be effective in their own right, they do not specifically focus on the maintenance and cleanliness of surfaces to prevent lead dust accumulation, making specialized cleaning the most relevant method for this purpose.