Ohio Rev. Code Ann. § 3734.20
(A)
(1) If the director of environmental protection has reason to believe that hazardous waste was treated, stored, or disposed of at any facility or property located within the state or that solid waste or construction and demolition debris was disposed of at any facility or property in the state, the director may conduct such investigations and make such inquiries as are reasonable or necessary to determine if conditions at the facility or property: