"Liquid waste" or "wastewater" shall mean any and all waste materials which exist and are transportable in a liquid or slurry form, either treated or untreated. "Liquid waste" or "wastewater" shall not include or mean storm water, ground water, roof or yard drainage, or irrigation tailwater. (§ 1, Ord. 765, eff. October 7, 1976; as amended by § 3, Ord. 1470, eff. July 14, 2016)