Proposed Settlement Agreement, Clean Air Act Petition for Review

In accordance with section 113(g) of the Clean Air Act, as amended (``CAA''), notice is hereby given of a proposed settlement agreement to address a lawsuit filed by Sierra Club in the United States Court of Appeals for the District of Columbia Circuit: Sierra Club v. EPA, No. 16-1158 (D.C Cir.). On May 27, 2016, Sierra Club filed a petition for judicial review of the final action taken by EPA under the CAA titled ``Revisions to Ambient Monitoring Quality Assurance and Other Requirements'' (``final action'') at 81 FR 17,248 (Mar. 28, 2016). The proposed settlement agreement would resolve Sierra Club's lawsuit upon EPA's issuance of two nonbinding guidance documents recommending public notification practices concerning the submission and approval of ambient air monitoring network plans.