When conducting targeted sampling for multi-family dwellings, what is the main approach?

When conducting targeted sampling for multi-family dwellings, selecting units based on owner information is an effective approach because it allows assessors to focus on properties with a higher likelihood of lead hazards. By analyzing the history and maintenance records provided by the owner, assessors can identify specific units that may have been renovated or maintained differently, potentially posing a greater risk for lead exposure.

This method is strategic because it prioritizes resources and time toward the units that are most at risk, rather than spreading efforts evenly across all units or basing decisions on less relevant factors. While other sampling methods like random sampling or focusing only on specific floors or ages can be simpler, they may not yield the most informative results for lead risk assessments. This targeted strategy enhances the assessment's efficiency and effectiveness in identifying lead hazards where they are most likely to exist.