The Office of Air Quality Planning and Standards (OAQPS) of EPA is announcing the availability of a final document titled Policy Assessment for the Review of the Carbon Monoxide National Ambient Air Quality Standards (PA). The PA contains staff analyses of the scientific bases for alternative policy options for consideration by the Agency prior to rulemaking. POC for questions related to this document, please contact Dr. Deirdre Murphy, Office of Air Quality Planning and Standards (Mail code C504-06), U.S. EPA, Research Triangle Park, NC 27711; e-mail: murphy.deirdre@epa.gov; telephone: 919-541-0729; fax: 919-541-0237(Federal Register: November 2, 2010 [Notices], Page 67361).