Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Revision to the Motor Vehicle Enhanced I/M Program-Philadelphia, Pittsburgh, South Central, and Northern Regions and Safety Inspection Program Enhancements for Non-I/M Regions

EPA is approving several State Implementation Plan (SIP) revisions submitted by the Commonwealth of Pennsylvania. These revisions amend Pennsylvania`s existing, Federally-approved enhanced vehicle inspection and maintenance program (or I/M program) SIP. EPA is herein taking a single final rulemaking action to finalize two separately issued proposed rulemakings on the subject of Pennsylvania's I/M program. The intended effect of this combined final action is to approve the Commonwealth's revised I/M program SIP for the Philadelphia, Pittsburgh, South Central and Northern Regions. This action also serves to incorporate into the SIP a visual emission component inspection program done under the Commonwealth's annual safety inspection program in those 42 counties of Pennsylvania not subject to Federal I/M program requirements.