Section 52.2239 - Original Identification of plan section(a) This section identified the original "Air Implementation Plan for the State of Tennessee" and all revisions submitted by Tennessee that were federally approved prior to December 1, 1998. The information in this section is available in the 40 CFR, part 52 edition revised as of July 1, 1999, the 40 CFR, part 52, Volume 2 of 2 (§§ 52.1019 to End) editions revised as of July 1, 2000 through July 1, 2011, and the 40 CFR, part 52, Volume 3 of 3 (§§ 52.2020 to End) editions revised as of July 1, 2012. The Nashville-Davidson portion of the Tennessee's SIP previously identified in section 52.2222(c) is also available in the above editions. 79 FR 30052 , May 27, 2014