This is just an FYI to my NH3 clients. Although the changes are NOT significant (0.1 – 0.2 miles), they are indeed changes to the Downwind Protective Action Distances.
If you have used the 2020 ERG Distances in your Pre-Plans that you or I did for your Emergency Response Plan (ERP), it may be beneficial to update these pre-plans/ERP.
REDUCED distances are highlighted