§ 5-6-112. National categorical pretreatment standards.

(a)

Where a categorical pretreatment standard is expressed only in terms of the mass or the concentration of a pollutant in wastewater, the engineer may impose equivalent concentration or mass limits in accordance with 40 C.F.R. 403.6(c).

(b)

Where wastewater subject to a categorical pretreatment standard is mixed with wastewater not regulated by the same standard, the engineer shall impose an alternate limit using the combined waste stream formula in 40 C.F.R. 403.6(e).

(c)

A user may obtain from the engineer a variance from a categorical pretreatment standard if the user can prove, pursuant to the provisions in 40 C.F.R. 403.13, that the factors relating to its discharge are fundamentally different from the factors considered by the United States Environmental Protection Agency when developing the categorical standard.

(d)

A user may obtain from the engineer a net gross adjustment to a categorical pretreatment standard in accordance with 40 C.F.R. 403.15. (Ord. No. 4501, 10/13/07, Sec. 1)