Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; 1990 NOINFX/INF Base Year Emission Inventory for the Philadelphia Ozone Nonattainment Area
air-emissions · Rule · Published 1999-06-17 · Effective 1999-08-16 · PA · 64 FR 32422
Document
Document number
99-15267
Federal Register citation
64 FR 32422
CFR reference
40 CFR 52
Type
Rule
Action
Direct final rule.
Category
air-emissions
Publication date
1999-06-17
Effective date
1999-08-16
State
PA
EPA docket
PA121-4088a
Abstract
EPA is approving a State Implementation Plan (SIP) revision request that the Commonwealth of Pennsylvania submitted on July 31, 1998 for the Philadelphia severe ozone nonattainment area. The Commonwealth submitted this SIP revision in response to the Clean Air Act, which requires all ozone nonattainment areas to submit a comprehensive inventory of oxides of nitrogen (NO<INF>X</INF>) emissions, from all sources, for the calendar year 1990. This emission inventory is known as the 1990 base year inventory. This SIP revision applies to the Pennsylvania portion of the Philadelphia ozone nonattainment area, which consists of Bucks, Chester, Delaware, Montgomery, and Philadelphia Counties. EPA is approving the 1990 NO<INF>X</INF> base year inventory as a revision to Pennsylvania's SIP in accordance with the requirements of the Clean Air Act.