The discharge of nonacceptable industrial wastes, as defined in Section 921.01(c), into the system, whether directly or indirectly, is hereby prohibited. Where investigation reveals the presence in the system of nonacceptable industrial wastes emanating from any lot, land, building or premises located within or without the City, the owner, lessor, tenant or occupant of such lot, land, building or premises shall be required to treat, neutralize or in other ways prepare the noxious substance therein to the satisfaction of the Director of Public Safety and Service, in order to convert the same into acceptable industrial wastes.
(1957 Code §16-13)