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 Maryland Portion of the Philadelphia-Wilmington-Atlantic City Nonattainment Area; Withdrawal

Due to the receipt of an adverse comment, the Environmental Protection Agency (EPA) is withdrawing the September 25, 2017 direct final rule that approved the 2011 base year inventory for the Maryland portion of the Philadelphia-Wilmington-Atlantic City marginal nonattainment area for the 2008 8-hour ozone national ambient air quality standard (NAAQS). EPA stated in the direct final rule that if EPA received adverse comments by October 25, 2017, the rule would be withdrawn and not take effect. EPA subsequently received an adverse comment. EPA will address the comment received in a subsequent final action based upon the proposed action also published on September 25, 2017. EPA will not institute a second comment period on this action.