Approval and Promulgation of Implementation Plans; State of Missouri; St. Louis Inspection and Maintenance Program

Riepilogo

The Environmental Protection Agency (EPA) proposes to approve State Implementation Plan (SIP) revisions submitted by the State of Missouri relating to the Inspection and Maintenance (I/M) Program. On August 16, 2007, and December 7, 2007, the Missouri Department of Natural Resources (MDNR) requested to amend the SIP to replace the St. Louis centralized transient I/M240 vehicle test program Gateway Clean Air Program (GCAP) and associated state rule with a de-centralized, OBD only vehicle I/M program called, the Gateway Vehicle Inspection Program (GVIP), and a new I/M rule reflecting these changes. In this action, EPA is also proposing approval of three additional SIP revisions submitted by Missouri related to the state's I/M program including minor clarification edits to the new I/M rule, exemptions for specially constructed vehicles or "kit-cars," exemptions for Plugin Hybrid Electric Vehicles (PHEV), and rescission of Missouri State Highway Patrol rules from the Missouri SIP. These revisions to Missouri's SIP do not have an adverse effect on air quality as demonstrated in the technical support document which is a part of this docket. EPA's approval of these SIP revisions is being