Where the city’s wastewater treatment system achieves consistent removal of pollutants limited by categorical pretreatment standards, the city may apply to the approval authority for modification of specific limits in the categorical pretreatment standards. CONSISTENT REMOVAL means reduction in the amount of a pollutant or alteration of the nature of the pollutant in the influent to the POTW to a less toxic or harmless state in the effluent which is achieved by the POTW in samples taken when measured according to the procedures set forth in 40 C.F.R. § 403.7(d)(2) promulgated pursuant to the Act. The city may then modify pollutant discharge limits in the categorical pretreatment standards if the requirements contained in 40 C.F.R. § 403.7 are fulfilled and prior approval from the approval authority is obtained.
(1999 Code, § 101.05)