Federal Register - "Approval and Promulgation of Air Quality Implementation Plans; Maryland; 2011 Base Year Inventory for the 2008 8-Hour Ozone National Ambient Air Quality Standard for the Baltimore, Maryland Nonattainment Area"

Title: Approval and Promulgation of Air Quality Implementation Plans; Maryland; 2011 Base Year Inventory for the 2008 8-Hour Ozone National Ambient Air Quality Standard for the Baltimore, Maryland Nonattainment Area Source: Federal Register Data/Action: Environmental Protection Agency (Final Rule) Date: 8/9/2018 Text Preview: ...ENVIRONMENTAL PROTECTION AGENCY 40 CFR Part 52 [EPA-R03-OAR-2017-0396; FRL-9981-96--Region 3] Approval and Promulgation of Air Quality Implementation Plans; Maryland; 2011 Base Year Inventory for the 2008 8-Hour Ozone National Ambient Air Quality Standard for the Baltimore, Maryland Nonattainment Area AGENCY: Environmental Protection Agency (EPA). ACTION: Final rule. ----------------------------------------------------------------------- [[Page 39366]] SUMMARY: The Environmental Protection Agency (EPA)... ...EPA is approving the 2011 base year emissions inventory for the 2008 8-hour ozone NAAQS as a revision to the Maryland state implementation plan (SIP) in accordance with the requirements of the Clean Air Act (CAA). DATES: This final rule is effective on September 10, 2018. ADDRESSES: EPA has established a docket for this action under Docket ID Number EPA-R03-OAR-2017-0396... ...EPA promulgated a revised ozone NAAQS of 0.08 ppm, averaged over eight hours. 62 FR 38855. This 8-hour ozone NAAQS was determined to be more protective of public health than the previous 1979 1-hour ozone NAAQS. See 44 FR 8202 (February 8, 1979). In 2008, EPA revised the 8-hour ozone NAAQS from 0.08 to 0.075 ppm. See 73 FR 16436 (March 27, 2008).\1\ --------------------------------------------------------------------------- \1\ On October 1, 2015, EPA...