No user shall contribute, introduce or cause
to be contributed or introduced, directly or indirectly, into the
POTW any pollutant or wastewater which causes pass-through or interference.
These general prohibitions apply to all users of the POTW, whether
or not the user is subject to categorical pretreatment standards or
any other national, state, or local pretreatment standards or requirements.
The categorical pretreatment standards found at 40 CFR Chapter I, Subchapter N, Parts 405 to 471, are hereby incorporated in this Part
5 by reference as though set forth in full.
A. Where a categorical pretreatment standard is expressed
only in terms of either the mass or the concentration of a pollutant
in wastewater, the control authority may impose equivalent concentration
or mass limits in accordance with 40 CFR 403.6(c).
B. When wastewater subject to a categorical pretreatment
standard is mixed with wastewater not regulated by the same standard,
the control authority shall impose an alternate limit using the combined
waste stream formula in 40 CFR 403.6(e).
C. 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 the EPA
when developing the categorical pretreatment standard.
D. A user may obtain a net gross adjustment to a categorical
standard in accordance with 40 CFR 403.15.
Where the Lower Perkiomen Valley Regional Sewer
Authority's wastewater treatment system achieves consistent removal
of pollutants limited by national pretreatment standards, the Lower
Perkiomen Valley Regional Sewer Authority as control authority may
apply to the approval authority for modification of specific limits
in the national pretreatment standards. "Consistent removal" shall
mean reduction in the amount of a pollutant or alteration of the nature
of the pollutant by the wastewater treatment system to a less toxic
or harmless state in the effluent which is achieved by the system
in 95% of the samples taken when measured according to the procedures
set forth in Section 403.7(c)(2) of Title 40 of the Code of Federal
Regulations, "General Pretreatment Regulations for Existing and New
Sources of Pollution," promulgated pursuant to the Act. The Lower
Perkiomen Valley Regional Sewer Authority as control authority may
then modify pollutant discharge limits in the national pretreatment
standards if the requirements contained in 40 CFR 403.7 are fulfilled
and prior approval from the approval authority is obtained.
State requirements and limitations on discharges shall apply in any case where they are more stringent than federal requirements and limitations or those in this Part
5.
The Lower Perkiomen Valley Regional Sewer Authority as control authority reserves the right to establish by resolution more-stringent limitations or requirements on discharges to the wastewater disposal system if deemed necessary to comply with the objectives presented in §
117-65 of this Part
5.
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 control authority 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.