Draft PM2.5 Precursor Demonstration Guidance
EPA has developed a draft guidance document to assist states in the development of a PM2.5 precursor demonstration as permitted by the PM2.5 SIP Requirements Rule. This guidance includes specific guidance for a nonattainment NSR (NNSR) demonstration for states seeking to exempt proposed new major stationary sources and major modifications of a PM2.5 precursor from the NNSR requirements for PM2.5. Comments were accepted through January 31, 2017.
Reposted Ozone and PM2.5 SILs Guidance (PDF) (September 2016)(84 pp, 3 MB, About PDF)