FE Civil Exam Prep 81, Air Quality — NAAQS Pollutants and Plume Dispersion

This podcast is made by Ran Chen, who holds an EA license, Insurance and Securities licenses (Series 6, 63, 65), and the CFP® designation. He is passionate about opening access to high-quality exam preparation resources and helping learners prepare more effectively for professional certification exams. In this episode you will learn: - The six NAAQS criteria pollutants are Ozone (O₃), Particulate Matter (PM₂.₅/PM₁₀), Carbon Monoxide (CO), Nitrogen Dioxide (NO₂), Sulfur Dioxide (SO₂), and Lead (Pb). - Primary NAAQS are designed to protect human health, while secondary standards protect public welfare, such as crops and visibility. - The Gaussian plume model, found in the NCEES FE Reference Handbook, is used to calculate downwind pollutant concentrations. - A common exam trap is confusing the effective stack height (H), which includes plume rise, with the physical stack height (h). - Atmospheric stability classes (A-F) determine the plume's dispersion coefficients (σ_y, σ_z), directly impacting ground-level pollution concentration. For more free exam prep tools, practice questions, and AI-powered explanations, visit https://open-exam-prep.com/ or YouTube Channel: https://www.youtube.com/@Open-exam-prep