Asbestos Hazard Emergency Response Act (AHERA) Certification Practice Exam

What does PLM stand for and for what type of sample is it used?

1. Polarized Light Microscope, for bulk sampling

2. Phase Light Microscopy, for air sampling

3. Particle Light Measurement, for surface sampling

4. Polymer Light Microscope, for water sampling

The correct answer is: Polarized Light Microscope, for bulk sampling

PLM stands for Polarized Light Microscope, which is a specific type of microscope used primarily for analyzing bulk samples of materials to identify the presence of asbestos. This method allows for the detailed examination of the physical and optical properties of the sample fibers under polarized light, making it an effective technique for differentiating asbestos from other similarly appearing minerals. The use of PLM is crucial because it provides reliable results in assessing asbestos-containing materials in buildings and other environments, which is directly relevant to the goals of the Asbestos Hazard Emergency Response Act (AHERA). Understanding and identifying bulk samples is essential for assessing potential health risks and implementing safety measures for asbestos exposure. Other options mention different types of sampling or microscopy that do not accurately represent the function and purpose of PLM in relation to asbestos analysis.