What defined "target housing"?

"Target housing" is defined specifically as residential properties constructed before 1978 that are occupied by young children, particularly those under the age of 6. This definition is crucial in lead risk assessments and regulations because homes built before this year are more likely to contain lead-based paint and associated hazards, given that lead was banned for residential use in the United States in 1978.

The designation of "target housing" is particularly important for the protection of at-risk populations, such as young children, who are more susceptible to the harmful effects of lead exposure, which can lead to serious health issues, including developmental delays and learning disabilities. By identifying these areas, risk assessors can implement measures to help mitigate exposure and ensure the safety of the residents.

The other options do not meet the specific criteria laid out for target housing, whether by citing buildings constructed after the lead ban, structures without children, or commercial entities, which are outside the scope of residential lead hazard assessments.