(A) Where an effluent from an industrial process(es) is mixed prior to treatment with waste water other than those generated by the regulated process, fixed alternative discharge limits may be derived for the discharge permit by the Manager. These alternative limits shall be applied to mixed effluent and shall be calculated using the Combined Wastestream Formula and/or Flow-Weighted Averaging Formula.
(B) Where the effluent limits in a Categorical Pretreatment Standard are expressed only in terms of mass of pollutants per unit of production (production-based standard), the Manager may convert the limits to equivalent limitations expressed either as mass of pollutant discharged per day or of effluent concentration for purposes of calculating effluent permit limitations applicable to the permittee. The permittee shall be subject to all permit limits calculated in this manner under 40 C.F.R. § 403.6(c) and must fully comply with these alternative limits.
(Ord. 7-92, passed 2-4-1992)