The Director may at any time, with reasonable notice, require submission of data and/or information in addition to that required in the permit application or upon the permit. Such supplemental report may include, but not be limited to, changes in nature of process, volume, hourly rates of flow, mass emission rate, production quantities, hours of operation or other information which relates to the generation of waste, including specified constituents and characteristics of the wastewater discharge. Such report may also include the chemical constituents and quantity of liquid or gaseous materials stored on site, even though they may not normally be discharged. (Ord. 2466 § 7, 1991).