(A) Industrial user discharge permits shall be expressly subject to all provisions of this chapter and all other applicable regulations, user charges and fees established by the city. Permits may contain the following:
(1) The unit charge or schedule of user charges and fees for the wastewater to be discharged to the public sewer system;
(2) Limits on the average and maximum wastewater constituents and characteristics;
(3) Limits on average and maximum rate and time of discharge or requirements for flow regulation and equalization;
(4) Requirements for installation and maintenance of inspection and sampling facilities;
(5) Specifications for monitoring programs which may include sampling locations, frequency of sampling to be performed, types and standards of analysis and reporting schedules;
(6) Compliance schedule(s);
(7) Requirements for maintaining and retaining all records relating to wastewater discharge as specified by the city for a minimum of 3 years, and afford city access thereto;
(8) Requirements for notification of the city of any new introduction of wastewater constituents or any substantial change in the volume or character of the wastewater constituents being introduced into the wastewater treatment system;
(9) Requirements for notification of slug discharges;
(10) Requirements for the user to reimburse the city for all expenses related to monitoring, sampling and testing performed at the direction of the Superintendent and deemed necessary by the city to verify that the user is in compliance with the permit; and
(11) Any other conditions as deemed appropriate by the Superintendent and/or the city to ensure compliance with this chapter.
(B) Where an effluent from an industrial process is mixed prior to treatment with wastewaters other than those generated by the regulated process, fixed alternative discharge limits may be derived for the discharge permit by the Superintendent. These alternative limits shall be applied to the mixed effluent. These alternative limits shall be calculated using the combined wastestream formula and/or flow- weighted average formula given in 40 C.F.R. § 403.6(e). Where the effluent limits in a categorical pretreatment standard are expressed only in terms of mass of pollutants per unit of production (production-based standard), the Superintendent may convert the limits to equivalent limitations expressed either as mass of pollutant that may be discharged per day or of effluent concentration for purposes of calculating effluent permit limitations applicable to the permittee. The permittee shall be subject to all permit limits calculated in this manner under 40 C.F.R. § 403.6(c) and must fully comply with these alternative limits. All categorical industrial users subject to production-based standards must report production rates annually so that alternative permit limits can be calculated if necessary. The categorical industrial user must notify the Superintendent 30 days in advance of any change in production levels that might affect the flow or other data used to calculate the effluent limits in the discharge permit.
(1997 Code, § 625.4) (Ord. 91-05, passed 9-2-1991)