2060-AI43 201104 Unified Agenda of Federal Regulatory and Deregulatory Actions 2060 Air and Radiation AR 2000 Environmental Protection Agency EPA Review of the National Ambient Air Quality Standards for Carbon Monoxide Other Significant Previously Published in The Unified Agenda Final Rule Stage Undetermined No 40 CFR 50 42 USC 7408 and 7409 Judicial Final 08/12/2011 US District Court Northern District of CA San Francisco Division 5/5/08 Judicial NPRM 01/28/2011 US District Court Northern District of CA San Francisco Division 5/5/08 No NPRM 02/11/2011 76 FR 8158 NPRM Comment Period End 04/12/2011 Final Action 08/00/2011 EPA publication information: NPRM - http://www.regulations.gov/#!documentDetail; EPA Docket information: EPA-HQ-OAR-2008-0015 No No Federal Local State Tribal No No http://www.epa.gov/ttn/naaqs/standards/co/s_co_index.html No No Deirdre Murphy 2060 Office of Air and Radiation OAR 919 541-0729 919 541-0840 murphy.deirdre@epa.gov C539-02, Research Triangle Park NC 27709 Karen Martin 2060 Office of Air and Radiation OAR 919 541-5274 919 541-0237 Martin.Karen@epamail.epa.gov C504-06, Research Triangle Park NC 27711