The policy assessment (PA) presents a staff analysis of the scientific basis for policy options for consideration by senior EPA management prior to rulemaking. Such an evaluation of policy implications is intended to help ‘‘bridge the gap’’ between the Agency’s scientific assessments, presented in the integrated science assessment (ISA) and risk/exposure assessment (REA), and the judgments required of the EPA Administrator in determining whether it is appropriate to retain or revise the NAAQS.

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• Errata for the August 2014 Policy Assessment Final Report, July 2015
• Policy Assessment for the Review of the Ozone National Ambient Air Quality Standards, Final Report (PDF)(597 pp, 7 M, August 2014)
• Policy Assessment for the Review of the Ozone National Ambient Air Quality Standards, Second External Review Draft (PDF)(510 pp, 17 M, January 2014)
• Policy Assessment for the Review of the Ozone National Ambient Air Quality Standards, First External Review Draft (PDF)(297 pp, 943 K, August 2012)

You may also be interested in other documents from the current ozone NAAQS review.