Update to Meteorological Data for Inclusion of New Processor Default 5/24/2017 4:53:00 PM View Count 3577 On January 17, 2017 the final revisions to the Guideline on Air Quality Models (Appendix W) were published in the Federal Register. The effective date of the rule was subsequently delayed but became effective on May 22, 2017.
Update to Meteorological Data Used for Dispersion Modeling 1/3/2017 3:09:00 PM View Count 3751 On December 20, 2016, the EPA finalized updates to the Guideline on Air Quality Models (Appendix W) as well as updated versions (v16216) of AERMOD, AERSCREEN and AERMET.