CDPH Lead Inspector/Assessor California State Practice Exam

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A negative XRF classification indicates what?

Lead is present above the standard
Lead is absent in the sample
The results are inconclusive
Lead presence is unresolved

The correct answer is: Lead is absent in the sample

A negative XRF classification indicates that lead is absent in the sample. This classification comes from the assessment conducted using X-ray fluorescence (XRF) technology, which measures the presence of lead in materials. A negative result means that the levels of lead detected are below the regulatory threshold or standard set by health and safety guidelines, confirming that the sample does not pose a lead hazard. In practical terms, this result can significantly impact remediation decisions and safety protocols since a negative classification would typically suggest that no further action is needed regarding lead exposure risks in that specific area or item being tested. Understanding this distinction is crucial for lead inspectors and assessors, as it helps guide effective management and mitigation strategies for lead hazards.