The categorical pretreatment standards found at 40 C.F.R. Chapter I, Subchapter N, parts 405471 are hereby incorporated.
(a) Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the manager may impose equivalent concentration or mass limits in accordance with 40 C.F.R. § 403.6(c).
(b) When wastewater subject to a categorical pretreatment standard is mixed with wastewater not regulated by the same standard, the manager shall impose an alternate limit using the combined wastestream formula in 40 C.F.R. § 403.6(e).
(c) A user, in the sole discretion of the manager, may obtain a variance from a categorical pretreatment standard if the user can prove, pursuant to the procedural and substantive provisions in 40 C.F.R. § 403.13, that factors relating to its discharge are fundamentally different from the factors considered by the EPA when developing the categorical pretreatment standard.
(d) A user may obtain a net gross adjustment to a categorical standard in accordance with 40 C.F.R. § 403.15.
(1992 Code, § 41-119.1) (Ord. 47-81, passed 6-1-1981; Ord. 57-93, passed 7-12-1993; Ord. 19- 21, passed 2-16-2021)