Environmental Protection Agency (EPA) Lead Risk Assessor Practice Exam

Which of the following is a criterion for acceptable dust wipe?

1. Single dwelling only

2. Same component only

3. Different locations

4. Homogeneous surfaces

The correct answer is: Different locations

The correct answer emphasizes the importance of assessing lead dust levels in various locations within a property. Acceptable dust wipes should be conducted from different locations because this approach provides a comprehensive evaluation of lead contamination. Lead dust can vary significantly across different areas due to factors such as the presence of lead-based paint, wear and tear, and occupant activities. By taking samples from various locations, you can ensure that the assessment accurately reflects the potential exposure risks throughout the entire space, rather than just a singular point that might not represent the overall condition. This broader sampling is crucial for effective risk assessment and remediation planning. The other options do not fulfill the criteria necessary for a valid lead dust wipe assessment. For instance, “single dwelling only” limits the evaluation to just one structure, which wouldn’t account for potential contamination elsewhere. “Same component only” restricts the assessment to a single type of surface, which may overlook varied lead presence in different surfaces. “Homogeneous surfaces” might not provide a realistic view since lead contamination can be uneven across seemingly similar areas. Therefore, assessing different locations is key to accurately understanding lead dust exposure risks.