EPA is granting final approval of Ohio rules concerning equivalent visible emission limits (EVELs), i.e., alternate opacity limits that may be established for stack sources that meet mass emission limits but cannot meet standard opacity limits. Ohio's rules provide criteria for establishment of EVELs, and the rules provide that EVELs established according to these criteria take effect without formal review by EPA. Ohio submitted these rules on July 18, 2000, and EPA published notices of proposed rulemaking on December 2, 2002, and on January 23, 2007, that proposed to approve these rules. EPA received one adverse comment letter. EPA will honor the commenter's recommendation to fully codify the effects of this action, but EPA does not agree that further notice and opportunity for comment is necessary. As a result of this action, previous State modifications to EVELs will become effective at the Federal level on November 15, 2007. Similarly, any future action by the State to establish, modify, or rescind EVELs in accordance with the criteria given in these Ohio rules, as approved, will become effective at the federal level immediately upon the effective date of the State action.