CHAPTER 19. WASTEWATER DISCHARGE AND TREATMENT.
Article II. Discharge Requirements.
Sec. 19-2-4. Modification of federal categorical pretreatment standards.
(a) Where the WPCF achieves consistent removal of pollutants limited by
pretreatment standards, the city may apply to the Administrator for modification
of specific limits in the pretreatment standards. The city may then modify
pollutant discharge limits in the pretreatment standards if the requirements
contained in 40 CFR 403.7 are fulfilled and prior approval from the
Administrator is obtained.
(b) Where a pretreatment standard is expressed
only in terms of either the mass or the concentration of a pollutant in
wastewater, the city may impose equivalent concentration or mass limits in
accordance with 40 CFR 403.6(c).
(c) When wastewater subject to a
pretreatment standard is mixed with wastewater not regulated by the same
standard, the city shall impose an alternate limit using the combined
wastestream formula in 40 CFR 403.6(e).
(d) A user otherwise classified as a
CIU may obtain a variance from a pretreatment standard if the user can prove,
pursuant to the procedural and substantive provisions in 40 CFR 403.13, that
factors relating to its discharge are fundamentally different from the factors
considered by EPA when developing the pretreatment standard.
(e) A CIU may
obtain a net gross adjustment to a pretreatment standard in accordance with 40
CFR 403.15. (Ord. No. 1271, § 1 (part).)