This guidance establishes the policies and procedures for carrying out EPA's responsibilities under Section 309 of the Clean Air Act to review and comment on federal actions affecting the quality of the environment. The errata sheet updates a few sections in the guidance and should be used in conjunction with the guidance.

• Policy and Procedures for the Review of Federal Actions Impacting the Environment (PDF)(44 pp, 12 MB)
• Errata for the Policy and Procedures for the Review of Federal Actions Impacting the Environment (PDF)(5 pp, 267 K)