Thursday, May 27, 2021, pages 28469 - 28685 / Environmental Protection Agency: Rules and Regulations: Air Plan Approval; Pennsylvania; 1997 8-Hour Ozone National Ambient Air Quality Standard Second Maintenance Plan for the Youngstown-Warren-Sharon Area: [FR DOC # 2021-11166]
Friday, October 30, 2020, pages 68709 - 69118 / Environmental Protection Agency: Proposed Rules: Air Plan Approval; Pennsylvania; 1997 8-Hour Ozone National Ambient Air Quality Standard Second Maintenance Plan for the Youngstown-Warren-Sharon Area: [FR DOC # 2020-23781]
Monday, March 1, 2021, pages 11847 - 12078 / Environmental Protection Agency: Proposed Rules: Air Plan Approval; Pennsylvania; 1997 8-Hour Ozone National Ambient Air Quality Standard Second Maintenance Plan for the Youngstown-Warren-Sharon Area; Reopening of Comment Period: [FR DOC # 2021-04106]
Friday, October 19, 2007, pages 59153 - 59474 / Environmental Protection Agency: Rules and Regulations: Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Redesignation of the Mercer County Portion of the Youngstown-Warren-Sharon, OH-PA 8-Hour Ozone Nonattainment Area to Attainment and Approval of the Area's Maintenance Plan and 2002 Base Year Inventory: [FR DOC # E7-20567]
Friday, July 27, 2007, pages 41215 - 41422 / Environmental Protection Agency: Proposed Rules: Approval and Promulgation of Air Quality Implementation Plans; Pennsylvania; Redesignation of the Mercer County Portion of the Youngstown-Warren-Sharon, OH-PA 8-Hour Ozone Nonattainment Area to Attainment and Approval of the Associated Maintenance Plan and 2002 Base-Year Inventory: [FR DOC # E7-14589]