The categorical pretreatment standards found at 40 CFR Chapter
I, Subchapter N, Parts 405 through 471 are hereby incorporated.
A. Deadlines for compliance with categorical pretreatment standards
by existing sources and new sources shall be in accordance with 40
CFR 403.6(b).
B. Where a categorical pretreatment standard is expressed only in terms
of either the mass or the concentration of a pollutant in wastewater,
the Superintendent may impose equivalent concentration or mass limits
in accordance with 40 CFR 403.6(c).
C. When wastewater subject to a categorical pretreatment standard is
mixed with wastewater not regulated by the same standard, the Superintendent
shall impose an alternate limit using the combined wastestream formula
in 40 CFR 403.6(e).
D. A user may obtain a variance from a categorical pretreatment standard
if the user can prove, pursuant to the procedural and substantive
provisions in 40 CFR 403.13, that factors relating to its discharge
are fundamentally different from the factors considered by EPA when
developing the categorical pretreatment standard.
E. A user may obtain a net gross adjustment to a categorical standard
in accordance with 40 CFR 403.15.
The State of Wisconsin Pretreatment Standards found in the Wisconsin
Administrative Code NR 220 through NR 297 are hereby incorporated.
The City reserves the right to establish, by chapter, or in
wastewater discharge permits, more stringent standards or requirements
on discharges to the POTW.
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 to achieve compliance with a discharge limitation
unless expressly authorized by an applicable pretreatment standard
or requirement. The Superintendent may impose mass limitations on
users who are using dilution to meet applicable pretreatment standards
or requirements, or in other cases when the imposition of mass limitations
is appropriate.