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; Withdrawal of Direct Final Rule

Due to adverse comments received, the Environmental Protection Agency (EPA) is withdrawing the October 3, 2017 direct final rule that approved a state implementation plan (SIP) revision submitted by the State of Maryland to add the 2011 base year inventory for the Baltimore, Maryland moderate nonattainment area for the 2008 8-hour ozone national ambient air quality standard (NAAQS) into Maryland's SIP. EPA stated in the direct final rule that if EPA received adverse comments by November 2, 2017, the rule would be withdrawn and not take effect. EPA subsequently received adverse comments. EPA will address the comments received in a subsequent final action based upon the proposed rulemaking action also published on October 3, 2017. EPA will not institute a second comment period on this action.