Ohio Rev. Code Ann. § 3707.40

As used in sections 3707.40 to 3707.46 of the Revised Code, "sanitary plant" means a structure with necessary land, fixtures, appliances, and appurtenances required for the treatment, purification, transfer, and disposal in a sanitary manner of the sewage, solid wastes as defined in section 3734.01 of the Revised Code, or any other liquid or solid wastes of a municipal corporation.