Transportation Conformity Guidance forrnQuantitative Hot-Spot Analyses inrnPM2.5 and PM10 Nonattainment andrnMaintenance Areas

摘要

This guidance describes how to complete quantitative hot-spot analyses for certain highway and transit projects in PM2.5 and PM10 (PM) nonattainment and maintenance areas. This guidance describes transportation conformity requirements for hot-spot analyses, and provides technical guidance on estimating project emissions with the Environmental Protection Agency’s (EPA’s) MOVES model, California’s EMFAC model, and other methods. It also outlines how to apply air quality models for PM hot-spot analyses and includes additional references and examples. However, the guidance does not change the specific transportation conformity rule requirements for quantitative PM hot-spot analyses, such as what projects require these analyses. EPA has coordinated with the Department of Transportation (DOT) during the development of this guidance