CDPH Lead Inspector/Assessor California State Practice Exam

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During Perimeter Soil Composite sampling, spots should be spaced at least how far apart?

1 foot
2 feet
3 feet
4 feet

The correct answer is: 2 feet

When conducting Perimeter Soil Composite sampling, it is essential to ensure that the sampling points are adequately spaced to obtain representative samples and to minimize cross-contamination. Spacing the sampling spots at least 2 feet apart allows for sufficient separation to reduce the likelihood that samples will be influenced by nearby soils, which might have different lead concentrations or contamination levels. This distance helps achieve a more accurate assessment of soil lead levels in the area being evaluated. Proper spacing not only aids in compliance with established protocols but also improves the reliability of results used for risk assessment and remediation purposes.