The USEPA is determining that the Cleveland-Akron-Lorain (CAL) ozone nonattainment area (which includes the Counties of Ashtabula, Cuyahoga, Geauga, Lake, Lorain, Medina, Portage and Summit) has attained the public health-based National Ambient Air Quality Standard (NAAQS) for ozone. This determination is based upon three years of complete, quality-assured, ambient air monitoring data for the 1993 to 1995 ozone seasons that demonstrate that the ozone NAAQS has been attained in each of these areas. On the basis of this determination, USEPA is also determining that certain reasonable-further-progress (RFP) and attainment demonstration requirements, along with certain other related requirements, of Part D of Title 1 of the Clean Air Act (CAA) are not applicable to the Cleveland-Akron-Lorain area. In another part of this rulemaking, the USEPA is approving the Ohio Environmental Protection Agency (OEPA) request to revise the official designation of the Cleveland-Akron-Lorain (CAL) area as an area that is meeting the ozone air quality standard. The USEPA is also approving the CAL area maintenance plan as a revision to Ohio's State Implementation Plan (SIP) for ozone. The purpose of the maintenance plan is to provide for continued good ozone air quality levels in the area over the next 10 years.