For patched TSI, how many samples are needed if the patch section is small?

When dealing with patched Thermal System Insulation (TSI), the requirement for sampling is based on the size of the patched area. If the patch section is small, specifically less than 6 linear feet or covering an area of less than 6 square feet, the standard guidance stipulates that only one sample is necessary to assess the asbestos content accurately. This approach allows for a practical evaluation without imposing excessive sampling requirements for minor areas that are unlikely to pose significant risks.

In contrast, the other options would either propose additional samples or entirely different protocols that do not align with established practices for small patched sections. For instance, requiring two samples regardless of size could lead to unnecessary sampling efforts when one sample suffices to determine safety and compliance. Furthermore, the options that state no samples are needed unless damage is noted or that three samples are required irrespective of size do not reflect the protocols for evaluating small patches where the risk of asbestos exposure is relatively low. Thus, the most appropriate and efficient response is to take just one sample when the patched area is small.