United States Environmental Protection Agency

It would be helpful to reference these maps in Chapter 3, especially if the maps are updated to show concentration metrics relevant to standards (e.g., 3hr max SO2) or impacts (e.g., daily peak values of nitric acid [HNO3]). Biogeochemical Responses of Soils to Nitrogen and Sulfur Deposition (Chapter 4) Charge Question 4. ................
................