The categorical pretreatment standards found at 40 C.F.R. chapter 1, subchapter N, parts 405-471 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 Wastewater Utility 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 Wastewater Utility Manager shall impose an alternate limit using the combined wastestream formula in 40 C.F.R. § 403.6(e).
(C) A user may obtain a variance from the Board 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 from the Board a net gross adjustment to a categorical standard in accordance with 40 C.F.R. § 403.15.
(Ord. 2008-38, passed 12-10-2008; Ord. 2019-25, passed on 5-13-2020)