Asbestos Contractor/Supervisor Practice Exam

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Which method is allowed for the analysis of visible emissions concerning asbestos according to AHERA regulations?

The correct answer is: PCM

The method allowed for the analysis of visible emissions concerning asbestos according to AHERA (Asbestos Hazard Emergency Response Act) regulations is the Phase Contrast Microscopy (PCM) technique. PCM is specifically utilized to evaluate airborne fibers and is significant when it comes to assessing visible emissions of asbestos. This analysis is crucial for ensuring safety and compliance during asbestos abatement projects, as it helps in monitoring the fiber levels in the air, which is directly related to worker and public health. Other methods listed, such as PLM (Polarized Light Microscopy), EME (Electron Microscopy), and SWM (Scanning Electron Microscopy), have different applications and are not specifically designated for assessing visible emissions. PLM is mainly used for bulk asbestos identification, while EME and SWM can provide detailed identification at a micro-level but are not suitable for monitoring visible emissions directly in the air as required by AHERA. Understanding the context of these methodologies underscores the importance of PCM for visibility assessment in the management of asbestos risks.