No user shall increase the use of potable or process water or, in any other way, attempt to dilute a discharge as a partial or complete substitute for adequate treatment to achieve compliance with the local limits or the national pretreatment standards. The city may impose mass limitations on users which are using dilutions to meet the pretreatment standards or requirements of this chapter, or in other cases where the imposition of mass limitations is deemed appropriate by the city. (Ord. 1056, 1992)