Environmental Protection Agency (EPA) Lead Risk Assessor Practice Exam

What is a disadvantage of single wipe sampling?

1. Higher cost per sample

2. Limited data on specific locations

3. Requires more training

4. Not applicable for small areas

The correct answer is: Limited data on specific locations

Single wipe sampling focuses on collecting a specific sample of dust or surface lead contamination from a defined area, which can provide valuable information about lead presence in that particular location. However, a primary disadvantage is that it offers limited data on specific locations. Because it typically targets just one spot rather than providing a broad overview across various surfaces or areas, it may not effectively represent lead contamination across an entire room or location. While options such as higher cost per sample, the requirement for more training, or applicability to small areas each have their own concerns, they do not directly relate to the core limitation of single wipe sampling. By honing in on only a specific area, it fails to deliver a comprehensive assessment of lead levels in larger or multiple surfaces, which is critical when evaluating risk and making remediation decisions. This is especially important in environments where lead exposure could vary significantly from one location to another.