What is the required distance to close doors and windows during external renovation work to reduce lead exposure?

To minimize lead exposure during external renovation work, it is required to close doors and windows within a specific distance from the work area. The 20-foot distance is critical because it helps prevent lead dust and debris from migrating into the adjacent living spaces, where they could pose a health risk, particularly to children and pregnant women who are more vulnerable to lead exposure.

This distance is established based on safety protocols that aim to significantly reduce the likelihood of contamination from lead-based paint or other lead sources during renovation activities. By closing doors and windows within this radius, the potential for airborne lead particles entering the building is minimized, thereby protecting the occupants.

In contrast, other distances mentioned do not align with recommended guidelines for reducing lead exposure in residential areas. Ensuring effective containment and safety measures during renovation is key in safeguarding public health.