The categorical pretreatment standards in 40 C.F.R. chapter I, subchapter N, parts 405 through 471 are hereby incorporated and shall apply to categorical users as follows.
(A) Where a categorical pretreatment standard is expressed only in terms of either the mass or the concentration of a pollutant in wastewater, the Director 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 Director shall impose an alternate limit using the combined wastestream formula set out in 40 C.F.R. § 403(e).
(C) A person subject to a categorical pretreatment standard may obtain a variance from the categorical standard if the person 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 EPA when developing the categorical pretreatment standard.
(D) A person subject to a categorical pretreatment standard may obtain a net gross adjustment to a categorical standard in accordance with 40 C.F.R. § 403.15.
(Ord. 970318A, passed 3-18-1997)