The city may require that any significant industrial user discharging or proposing to discharge wastewater to the wastewater disposal system file a periodic self-monitoring discharge report. The discharge report shall include, but be limited to daily and monthly flow rates, pH, BOD5, suspended solids, oil and grease and frequency analysis. The reports may also include the chemical constituents and quantity of liquid or gaseous materials stored on site, even though they may not normally be discharged. A summary of the data indicating each industrial user's compliance with this subchapter shall be prepared monthly and submitted to the Director of Engineering. In addition to discharge reports, the city may require information in the form of wastewater discharge permit applications and compliance schedules.
(`86 Code, § 3.32)