There shall be no agreement between the City and an industrial concern that would allow any waiver of Federal prohibited discharge standards or categorical pretreatment standards except under the mechanisms specified in the General Pretreatment Standards Regulations. Special agreement or arrangements between the City and industrial concern falling within the mechanisms specified in the General Pretreatment Standards Regulations may be made whereby an industrial waste of unusual strength or character may be accepted by the City for treatment, subject to payment of a surcharge. The strength of such waste shall be determined by composite sampling at the owner's expense over a period of time sufficient to generate a representative sample. Surcharges will be assessed based on a prorated share of the annual costs of operation and maintenance associated with the treatment and handling of a substance, multiplied by the ratio of weight of excess substance over the normal weight of the substance treated annually.
(Ord. 311-3-92, passed 3-16-92; Am. Ord. 492-05-02, passed 5-20-02)