Part 3 of the NSR Webinar Series will cover BACT history and applicability, the top-down process, modifying BACT standards and example BACT determinations. The second part of this webinar will cover the Air Quality Analysis requirements and definition of ambient air quality. A description of the NAAQS and PSD increments will be explained, and the details of the analysis process will be outlined including what existing and proposed sources will need to be included in the analysis. Baseline dates will also be described.