Original sentence: On April 21st of 2000, the EPA proposed that AERMOD be adopted as the EPA's preferred regulatory model for both simple and complex terrain.On November 9th of 2005, AERMOD was adopted by the EPA and promulgated as their preferred regulatory model, effective as of December 9th of 2005
Edited sentence: On April 21 of 2000, the EPA proposed that AERMOD be adopted as the EPA's preferred regulatory model for both simple and complex terrain.On November 9 of 2005, AERMOD was adopted by the EPA and promulgated as their preferred regulatory model, effective as of December 9 of 2005