Ohio Revised Code Title XXXVII. Health Safety Morals § 3704.011

(1) A requirement established under the federal Clean Air Act or regulations adopted under it limits the emissions from the source to less than ten pounds per day of an air contaminant or restricts the operation of the source in a manner equivalent to an emission limit of less than ten pounds per day;

(2) An emission limit adopted by the director of environmental protection to achieve and maintain the national ambient air quality standards or a rule adopted by the director to protect public health and welfare limits the emissions from the source to less than ten pounds per day of an air contaminant or restricts the operation of the source in a manner equivalent to an emission limit of less than ten pounds per day;

(3) The source emits radionuclides;

(4) The source, alone or in combination with similar air contaminant sources at the same facility, would result in potential emissions of any air contaminant in excess of twenty-five tons per year;

(5) The source emits more than one ton per year of hazardous air pollutants.

(B)(1) Nothing in this section prohibits the director from adopting rules establishing emission limits or permit requirements, or requiring the submission of information for the purpose of developing those rules, for source categories described in divisions (A)(1) to (5) of this section.

(2) Nothing in this section affects the determination of whether a stationary source is a major source for purposes of the applicability of the Title V permit program to the source under section 3704.036 of the Revised Code or any requirement to list insignificant activities and emissions levels in a Title V permit application.

(3) Nothing in this section restricts the director's authority to require the submission of information as necessary to comply with the requirements of the federal Clean Air Act.