Air Quality Permitting for Data Centers in Pennsylvania

This technical report outlines the air quality permitting requirements for data centers in Pennsylvania, focusing on the construction and operational aspects of these facilities. It describes the critical role of obtaining air permits to avoid delays in construction schedules, emphasizing the need for a comprehensive air permit strategy that includes collaboration with regulatory agencies and consideration of Environmental Justice (EJ) factors. The report details the potential air emissions from various power sources, including diesel emergency backup generators, and the significance of staying below major source thresholds to simplify the permitting process. It explains the Federal New Source Review (NSR) program, including Prevention of Significant Deterioration (PSD) and Non-Attainment New Source Review (NNSR) regulations, which govern emissions from major stationary sources. Additionally, the report discusses the steps for determining permitting requirements, including calculating Potential to Emit (PTE), identifying permit types, and conducting Best Available Technology (BAT) analyses, while highlighting the importance of public participation in the permitting process.