What is the required sample set composition for TEM sampling?

The correct answer specifies a comprehensive approach to sampling that ensures accurate results for Transmission Electron Microscopy (TEM) analysis. In the context of asbestos sampling, having a balance of inside and outside samples allows for a more thorough understanding of the asbestos presence and potential contamination levels within a given area.

Including multiple inside samples enables the technician to assess the conditions in the area of concern, while outside samples provide a reference to distinguish between background levels of asbestos in the environment and those potentially due to disturbance in the monitored area. Additionally, having two field blanks is crucial; these are unexposed samples that help identify any contamination that may occur during the sampling process itself. The inclusion of one sealed blank serves as a control to further validate the integrity of the sampling procedure.

This comprehensive sampling strategy helps ensure that the results are reliable and that any decisions based on the data collected are well-founded in scientifically sound methods. The combination of different sample types and controls ultimately enhances the accuracy of the analysis and supports effective asbestos management practices.