Release of Risk and Exposure Assessment Planning Document for the Review of the Primary National Ambient Air Quality Standards for Sulfur Oxides

The Environmental Protection Agency (EPA) is conducting a periodic review of the air quality criteria and the primary National Ambient Air Quality Standards (NAAQS) for Sulfur Oxides (SOX). On or about February 16, 2017, the EPA will make available for public review the document titled Review of the Primary National Ambient Air Quality Standards for Sulfur Oxides: Risk and Exposure Assessment Planning Document (REA Planning Document). This plan presents considerations and the proposed approach for conducting quantitative analyses of sulfur dioxide (SO2) exposures and health risks in this NAAQS review. This planning document is intended to facilitate consultation with the Clean Air Scientific Advisory Committee (CASAC) and public comment on plans for such quantitative analyses.