52.2226—Extensions.
The Administrator hereby extends for 18 months (until July 1, 1980) the statutory deadline for submittal of a plan to attain the secondary SO2 standard in Copperhill.
(b)
The Administrator hereby extends for 18 months (until July 1, 1980) the statutory timetable for submittal of Tennessee's plans to attain and maintain the secondary ambient standard for particulate matter in the Chattanooga, Columbia, Kingsport, Memphis, and Nashville nonattainment areas ( 40 CFR 81.343 ).