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Day 30
Note: EPA no longer updates this information, but it may be useful as a reference or resource.
- Determination of Attainment, Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; Indiana; Redesignation of Allen County 8-Hour Ozone Nonattainment Area to Attainment for Ozone
- Amendments to Regulations for Heavy-Duty Diesel Engines
- Amendments to Regulations for Heavy-Duty Diesel Engines
- Federal Implementation Plan for the Billings/Laurel, MT, Sulfur Dioxide Area; Extension of Comment Period
- Determination of Attainment, Approval and Promulgation of Implementation Plans and Designation of Areas for Air Quality Planning Purposes; Indiana; Redesignation of Allen County 8-hour Ozone Nonattainment Area to Attainment for Ozone
AIR TEXT Files - [ZIP 50kb] - Amendments to Regulations for Heavy-Duty Diesel Engines