The discharge of nonacceptable industrial wastes, as defined in Section 929.01 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 corporate limits of the Municipality, the owner, lessor, renter 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 Board of Trustees of Public Affairs, in order to convert the same into acceptable industrial waste. (Ord. 297. Passed 11-22-65.)