§ 18-95. National Categorical Pretreatment Standards.

Industrial users must comply with the categorical pretreatment standards found at 40 CFR Chapter I, Subchapter N, Parts 405-471 as amended.

(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 federal and state pretreatment regulations.

(b)

When the limits in a categorical pretreatment standard are expressed only in terms of mass of pollutant per unit of production, the director may convert the limits to equivalent limitations expressed either as mass of pollutant discharged per day or effluent concentration for purposes of calculating effluent limitations applicable to individual industrial users in accordance with federal and state pretreatment regulations.

(c)

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 in accordance with federal and state pretreatment regulation.

(Ord. of 4-29-09(1), § 1)

(Ord. of 4-29-09(1), § 1)