What is the method of analysis for TEM?

The correct method of analysis for Transmission Electron Microscopy (TEM) specifically relates to the guidelines set by the Asbestos Hazard Emergency Response Act (AHERA). AHERA is a set of regulations that was enacted to manage the risks associated with asbestos in schools, including how to identify and analyze asbestos fibers. TEM is significantly utilized within the scope of AHERA due to its ability to detect asbestos at very small sizes, providing a high level of sensitivity and accuracy in quantifying asbestos content in samples, which is essential for risk assessment and management.

While NIOSH 7402, PLM (Polarized Light Microscopy), and EPA 40 CFR Part 763 refer to different methods of analysis or regulatory frameworks regarding asbestos, they do not specifically designate TEM as the method of choice for asbestos fiber identification. NIOSH 7402 pertains to the sampling and determination of asbestos in workplace air, PLM is another commonly used method for the identification of asbestos in bulk materials, and EPA regulations provide broader guidelines regarding asbestos management but are not focused exclusively on TEM. Thus, among the choices provided, AHERA represents the correct association with the method of analysis for TEM.