How is targeted sampling typically performed in environments likely to contain lead hazards?

Targeted sampling is typically performed in environments likely to contain lead hazards by using information from the property owner. This approach recognizes that property owners often have valuable insights or data regarding previous renovations, paint history, and potential lead exposure areas, such as locations of peeling paint or areas where children frequently play. By gathering this specific information, assessors can focus their sampling efforts on the most at-risk areas, which increases the efficiency of the assessment process and enhances the chances of detecting lead hazards.

While other methods mentioned could contribute to the overall understanding of the property, they do not offer the same direct and relevant insights specific to the risks present at that location. Stratifying the sampling process or conducting extensive historical research are helpful tools but may not be as immediately effective in directing efforts toward lead mitigation compared to leveraging the knowledge of the property owner. Randomly sampling every fifth unit can lead to oversight of high-risk areas that may not be captured through a generic sampling strategy.