If any test is inconclusive, you should always assume it is positive or take a paint sample.

If any test is inconclusive, you should always assume it is positive or take a paint sample.

• A. False
• B. True
• C. It depends on the test
• D. Only if allowed by protocol

Answer: (B)

When a field test doesn’t give a clear positive or negative result, the safe and reliable approach is to obtain a definitive determination by collecting a paint sample for laboratory analysis. Inconclusive results can occur for several reasons—surface conditions, multiple paint layers, interference from other compounds, or device limitations—so acting on uncertainty can lead to missing lead hazards. By sending a representative sample to a certified laboratory, you get precise lead content measurements that inform whether a surface contains lead above the applicable threshold and what actions are needed. This is why taking a paint sample is the recommended course of action.

When a field test doesn’t give a clear positive or negative result, the safe and reliable approach is to obtain a definitive determination by collecting a paint sample for laboratory analysis. Inconclusive results can occur for several reasons—surface conditions, multiple paint layers, interference from other compounds, or device limitations—so acting on uncertainty can lead to missing lead hazards. By sending a representative sample to a certified laboratory, you get precise lead content measurements that inform whether a surface contains lead above the applicable threshold and what actions are needed. This is why taking a paint sample is the recommended course of action.