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Does the conformity guidance for multi-jurisdictional areas apply only to the 8-hour standard, or does it also apply to PM2.5 and other standards?

April 26, 2017areas Conformity guidance multi-jurisdictional pm2.5 standard Standards

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Does the conformity guidance for multi-jurisdictional areas apply only to the 8-hour standard, or does it also apply to PM2.5 and other standards?

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EPA’s “Conformity Implementation in Multi-jurisdictional Nonattainment and Maintenance Areas for Existing and New Air Quality Standards (EPA420-B-04-012, July 2004)” guidance is applicable to all pollutants. Although some portions of this guidance are applicable only to 8-hour nonattainment areas with 1-hour budgets (i.e., Part 4 of the guidance), the rest of the guidance is applicable to all pollutants.