The 2018 EPA Regional, State, and Local (RSL) Modelers' Workshop was scheduled for Tuesday, June 5th through Thursday, June 7th at the EPA Region 1 Offices in Boston, MA. This Workshop provided the federal, state, local, and tribal levels of the regulatory modeling community the opportunity to present, interact, and communicate various technical issues and solutions related to regulatory air quality modeling. A large segment of the Workshop addressed cross-cutting issues related to permit modeling, as well as selected topics provided by Regional, State, and Local modelers.
The Workshop was open to industry representatives and outside participants in addition to the co-regulating air agencies on Tuesday, June 5th to allow for a joint engagement of the entire permit modeling community on the continued interpretation and application of the recently revised Guideline on Air Quality Modeling (Appendix W) and the associated preferred air quality models, e.g., AERMOD. A portion of Tuesday afternoon was dedicated to presentations specific to single-source modeling guidance for ozone and PM2.5. The Workshop was open only to EPA personnel, federal partner agencies, and state, local, and tribal agency dispersion modelers on Wednesday and Thursday, June 6th and 7th.