Substantial changes in:business location; industrial process; volume or characteristics of pollutants in the discharge; quantity or quality of discharge; or in chemical storage practices, shall be reported to the Director. Advance notice is required for anticipated facility expansions and for production increases, decreases, or modifications which could result in the change of the quantity or quality of discharged pollutants. City Code, 1976/83, art. 25, §7(a)(5) Ord. 91-775