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Draft guidance for ozone and fine particulate matter permit modeling.

Research Triangle Park, NC : U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Air Quality Policy Division, 2020. 2020

Exceptional events guidance: prescribed fire on wildland that may influence ozone and particulate ma

Research Triangle Park, NC : U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Air Quality Policy Division, Air Quality Assessment Division, August 2019. 2019-

Guidance on regional haze state implementation plans for the second implementation period.

Research Triangle Park, North Carolina : U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Air Quality Policy Division, 2019. 2019

Guidance on the preparation of Clean Air Act Section 179B demonstrations for nonattainment areas aff

Research Triangle Park, North Carolina : U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Air Quality Policy Division, 2020. 2020-

Guidance on the preparation of exceptional events demonstrations for stratospheric ozone intrusions.

Research Triangle Park, NC : U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Air Quality Policy Division : Air Quality Assessment Division, 2018. 2018

PM2.5 precursor demonstration guidance.

Research Triangle Park, NC : U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards, Air Quality Assessment Division, Air Quality Policy Division, 2019. 2019

National air quality and emissions trends report

Research Triangle Park, N.C. : U.S. Environmental Protection Agency, Office of Air Quality Planning and Standards 1995