Approval and Promulgation of Implementation Plans Tennessee: Approval of Source Specific Nitrogen Oxide Permits Into the Tennessee State Implementation Plan

In this action, EPA is approving two source specific permits into the Tennessee State Implementation Plan (SIP) submitted to EPA by Tennessee, through the Tennessee Department of Air Pollution Control (TDAPC) which limit nitrogen oxide (NO<INF>X) emissions for certain engines at the Tenneco Energy Portland facility located in Sumner County, Tennessee. These permits are necessary because NO<INF>X reductions from the Tenneco Energy Portland facility were used in calculating the NO<INF>X emissions projections in the maintenance plan for the Middle Tennessee ozone nonattainment area. EPA is proposing approval of the ozone redesignation request in a separate action.