What is the recommended number of samples to be taken for surfacing material?

The recommended number of samples to be taken for surfacing material is nine. This guideline is based on industry standards to ensure a comprehensive assessment of the material's asbestos content. Taking nine samples helps to provide a statistically significant representation of the entire area being assessed, minimizing the potential for overlooking asbestos-containing materials.

The number is intended to offer a balance between thoroughness and practicality, allowing investigators to capture variations that may exist within the surfacing material while keeping the sampling process manageable. Therefore, adhering to this guideline supports the goal of safety and compliance during asbestos inspections.