The quantitative risk and exposure assessments inform the EPA's review of the NAAQS.You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
- Risk and Exposure Assessment for the Review of the NAAQS for SOx (PDF)(515 pp, 21 MB, 05/09/2018)
- Risk and Exposure Assessment for the Review of the NAAQS for SOx, External Review Draft (PDF)(456 pp, 15 MB, 08/24/2017)
- Memorandum Regarding CASAC Request for data associated with Appendix D of the draft REA (PDF)(4007 pp, 8 MB)