Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen and Oxides of Sulfur

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On or about March 1, 2010, the Office of Air Quality Planning and Standards (OAQPS) of EPA is making available a draft report, Policy Assessment for the Review of the Secondary National Ambient Air Quality Standards for Oxides of Nitrogen and Oxides of Sulfur: First External Review Draft. The EPA is releasing this preliminary draft document to seek early consultation with the Clean Air Scientific Advisory Committee (CASAC) and to solicit public comment on the overall structure and framing of key issues and areas of focus that will be discussed in a future, complete draft policy assessment document.