§ 150-27. Excessive discharges.

A. 

No user shall ever increase the use of process water or, in any way, attempt to dilute a discharge as a partial or complete substitute for adequate treatment or pretreatment to achieve compliance with the requirements or limitations contained in this chapter, any National Pretreatment Standards or requirement or any pollutant-specific limitation developed by the City or state. Where process effluent is mixed prior to treatment with wastewaters other than those generated by the regulated process, fixed alternative discharge limits may be derived by the POTW. These alternative limits shall be applied to the mixed effluent and will be derived in accordance with the combined waste stream formula as presented in 40 CFR Part 403.6(e).

B. 

Any industrial user subject to categorical pretreatment standards may make application to the City to adjust the applicable standard(s) to reflect credit for pollutants in the intake water, provided that the following criteria are met:

(1) 

The industrial user must demonstrate that the control system it proposes or uses to meet applicable categorical pretreatment standards would, if properly installed and operated, meet the standards in the absence of pollutants in the intake waters.

(2) 

The applicable categorical pretreatment standards contained in 40 CFR, Subchapter N, specifically provide that they shall be applied on a net basis.