(A) The National Categorical Pretreatment Standards as promulgated by USEPA pursuant to the Act which are adopted and incorporated herein by reference as if set out at length herein shall be met by all applicable users of the city's sewage treatment works. Copies of Standards shall be available at the Director's office and at the sewage treatment plant. The only exception to this requirement is when the city, upon application for removal credits, receives a modification to the Categorical Pretreatment Standards as provided for under the Act.
(B) (1) Existing sources shall comply with all applicable Categorical Pretreatment Standards within three years of the Standards' effective date unless a shorter compliance time is specified. Existing sources which become categorical industrial users after promulgation of an applicable pretreatment standard shall be considered existing industrial users except where those users meet the definition of new source (see § 50.001).
(2) New sources shall install, have in operating condition, start up and maintain all pollution control equipment necessary to meet applicable Categorical Pretreatment Standards before beginning to discharge wastewater to the sewage treatment works. New sources shall comply with all applicable Categorical Pretreatment Standards within the shortest feasible time, but not more than 90 days after the start of discharge.
(C) State requirements and limitations on discharges to the sewage treatment works shall be met by all users which are subject to these standards in any instance in which they are more stringent than federal requirements and limitations or those in this chapter or any applicable ordinance.
(D) The city reserves the right to amend this chapter to provide for more stringent limitations or requirements on discharges to the sewage treatment works where deemed necessary to comply with the objectives set forth in § 50.020.
(E) No user shall increase the use of potable or process water in any way, for the purpose of diluting a discharge as a partial or complete substitute for adequate treatment to achieve compliance with the standards set forth in this chapter.
(F) (1) No person shall discharge or cause to be discharged any water or wastes containing constituents exceeding the limitations established in this chapter. State and local requirements and discharge limitations shall be met by all dischargers subject to such Standards where these requirements and limitations are more stringent than federal limitations.
(2) The Director shall establish additional or more stringent limitations on wastewater strength, or more stringent specific limitations and requirements on individual dischargers where deemed necessary to comply with applicable Pretreatment Standards or the objectives of this chapter. The Director shall notify in writing each regulated or potentially regulated industrial user of the limitations or requirements. All limitations and requirements established by the Director shall be subject to the provisions of this chapter. In addition, the Director may issue specific orders to any user or may issue general orders to all users to require compliance with any requirements under this section, including applicable Categorical Pretreatment Standards, other discharge limitations and reporting requirements.
(G) The Director may impose mass limitations on users which are using dilution to meet the pretreatment standards or requirements of this chapter, or in other cases where the imposition of mass limitations is deemed appropriate.
(H) (1) The Director may convert limits of Categorical Pretreatment Standards which are only expressed in terms of mass of pollutant per unit of production to equivalent limits expressed as mass of pollutant discharged per day, or effluent concentration to calculate effluent limits applicable to individual users, provided the Director uses actual long-term production figures and actual long-term flow rates. Long-term production figures and actual long-term flow rates are only acceptable with a minimum of one complete representative production year. The equivalent calculated limits shall be deemed the Pretreatment Standard, and applicable users shall be required to comply with these equivalent limits in lieu of the promulgated Categorical Standards from which they are derived.
(2) Where Categorical Pretreatment Standards specify one limit for calculating maximum daily discharge limits and a second limit for maximum monthly average, or four-day average limits, the same production or flow figure shall be used to calculate both types of equivalent limits.
(3) Any industrial user which has equivalent mass or concentration effluent limits calculated from a production-based Categorical Pretreatment Standard shall notify the Director within two business days after the user has reasonable basis to know what the production level will significantly increase in the next calendar month. If a regulated user does not notify the Director of such anticipated change, the user shall meet the mass or concentration effluent limits that were calculated on the original estimate of the long-term production rate.
(Ord. 64-92, passed 8-10-92)