Ohio Rev. Code Ann. § 1513.13
(A)
(B) The commission shall affirm the notice of violation, order, or decision of the chief unless the commission determines that it is arbitrary, capricious, or otherwise inconsistent with law; in that case the commission may modify the notice of violation, order, or decision or vacate it and remand it to the chief for further proceedings that the commission may direct. The commission shall conduct hearings and render decisions in a timely fashion, except that all of the following apply:
(C) The chairperson of the commission, under conditions the chairperson prescribes, may grant temporary relief the chairperson considers appropriate pending final determination of an appeal if all of the following conditions are met:
(E)
(1) Whenever an enforcement order or permit decision is appealed under this section or any action is filed under division (B) of section 1513.15 or 1513.39 of the Revised Code, at the request of a prevailing party, a sum equal to the aggregate amount of all costs and expenses, including attorney's fees, as determined to have been necessary and reasonably incurred by the prevailing party for or in connection with participation in the enforcement proceedings before the commission, the court under section 1513.15 of the Revised Code, or the chief under section 1513.39 of the Revised Code, may be awarded, as considered proper, in accordance with divisions (E)(1)(a) to (c) of this section. In no event shall attorney's fees awarded under this section exceed, for the kind and quality of services, the prevailing market rates at the time the services were furnished under division (A) of this section. A party may be entitled to costs and expenses related solely to the preparation, defense, and appeal of a petition for costs and expenses, provided that the costs and expenses are limited and proportionate to costs and expenses otherwise allowed under division (E) of this section.