Users in industrial categories subject to the categorical pretreatment standards development by the EPA under the Act are required to comply with pretreatment standards promulgated pursuant to Section 307. The city may issue standards more stringent than the federal standards if the director determines that the limitations in the federal standards are not sufficient to: (1) protect the operation of the city's treatment facilities, or (2) comply with water quality standards or effluent limitations specified in the city's national pollutant discharge elimination system (NPDES) permit. (Ord. 2006-02 (part), 2006: Ord. 2000-18 §§ 1 (part), 2 (part), 2000: prior code § 4265)