Which of the following factors is a potential source of lead contamination?

The selection of scraping and sanding lead-based paint as a potential source of lead contamination is accurate. Lead-based paint, commonly found in homes built before 1978, poses a significant risk when it is disturbed during renovation or maintenance activities. Scraping and sanding can create lead dust and lead chips that become airborne or settle on surfaces, increasing the risk of lead exposure to occupants, particularly children who may ingest lead dust or chips. Given the serious health risks associated with lead exposure, including developmental delays in children, handling lead-based paint without proper precautions can lead to significant health hazards.

This understanding is crucial in managing lead hazards, especially in homes that may still contain lead-based paint. Safe practices involve using lead-safe work practices, such as using containment methods and personal protective equipment when working with such materials to prevent lead contamination and exposure.