The comment period for these draft revisions has been extended to February 4, 2009. The proposed changes were published in the Federal Register on October 20, 2008. POC is Mr. H. Lynn Dail, Office of Air Quality Planning and Standards, Sector Policies and Programs Division, Natural Resources and Commerce Group (E143-03), U.S. Environmental Protection Agency, Research Triangle Park, NC 27711; telephone number: (919) 541-2363; fax number: (919) 541-3470; and e-mail address: dail.lynn@epa.gov (Federal Register: December 3, 2008 [Proposed Rules], Page 73631-73632).