[Ord. No. 3393 §1, 4-20-2010]
A.
General Prohibitions. No user shall introduce or cause to
be introduced 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 they are subject to categorical
pretreatment standards or any other national, State or local pretreatment
standards or requirements.
B.
Specific Prohibitions. No user shall introduce or cause
to be introduced into the POTW the following pollutants, substances
or wastewater:
1.
Pollutants which create a fire or explosive hazard in the POTW including,
but not limited to, wastestreams with a closed-cup flashpoint of less
than one hundred forty degrees Fahrenheit (140°F) (sixty degrees
Celsius (60°C)) using the test methods specified in 40 CFR 261.21;
2.
Wastewater having a pH less than six (6.0) or more than ten (10.0)
or otherwise causing corrosive structural damage to the POTW or equipment;
3.
Solid or viscous substances in amounts which will cause obstruction
of the flow in the POTW resulting in interference but in no case solids
greater than three (3) inches or seven (7) centimeters in any dimension;
4.
Pollutants, including oxygen-demanding pollutants (BOD, etc.), released
in a discharge at a flow rate and/or pollutant concentration which,
either singly or by interaction with other pollutants, will cause
interference with the POTW;
5.
Wastewater having a temperature greater than one hundred forty degrees
Fahrenheit (140°F) (sixty degrees Celsius (60°C)) or which
will inhibit biological activity in the treatment plant resulting
in interference, but in no case wastewater which causes the temperature
at the introduction into the treatment plant to exceed one hundred
four degrees Fahrenheit (104°F) (forty degrees Celsius (40°C));
6.
Petroleum oil, non-biodegradable cutting oil or products of mineral
oil origin in amounts that will cause interference or pass through;
7.
Pollutants which result in the presence of toxic gases, vapors or
fumes within the POTW in a quantity that may cause acute worker health
and safety problems;
8.
Trucked or hauled pollutants;
9.
Noxious or malodorous liquids, gases, solids or other wastewater
which, either singly or by interaction with other wastes, are sufficient
to create a public nuisance or a hazard to life or to prevent entry
into the sewers for maintenance or repair;
10.
Wastewater which imparts color which cannot be removed by the treatment
process, such as, but not limited to, dye wastes and vegetable tanning
solutions, which consequently imparts color to the treatment plant's
effluent, thereby violating the City's NPDES permit;
11.
Wastewater containing any radioactive wastes or isotopes except in
compliance with applicable State or Federal regulations;
12.
Storm water, surface water, ground water, artesian well water, roof
runoff, subsurface drainage, swimming pool drainage, condensate, deionized
water, non-contact cooling water and unpolluted wastewater, unless
specifically authorized by the Superintendent;
13.
Sludges, screenings or other residues from the pretreatment of industrial
wastes;
14.
Medical wastes, except as specifically authorized by the Superintendent
in an individual wastewater discharge permit;
15.
Wastewater causing, alone or in conjunction with other sources, the
treatment plant's effluent to fail toxicity test;
16.
Detergents, surface-active agents or other substances which that
might cause excessive foaming in the POTW;
17.
Oils and/or greases in total (polar and non-polar) concentrations
greater than one hundred (100) mg/l;
18.
Wastewater causing two (2) readings on an explosion hazard meter
at the point of discharge into the POTW, or at any point in the POTW,
of more than five percent (5%) or any single reading over ten percent
(10%) of the lower explosive limit of the meter.
C.
Pollutants,
substances or wastewater prohibited by this Section shall not be processed
or stored in such a manner that they could be discharged to the POTW.
[Ord. No. 3393 §1, 4-20-2010]
A.
Users must comply with the categorical pretreatment standards found at 40 CFR Chapter I, Subchapter N, Parts 405 — 471.
2.
When the limits in a categorical pretreatment standard are expressed
only in terms of mass of pollutant per unit of production, the Superintendent
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.
3.
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 in accordance with 40 CFR 403.6(e).
4.
When a categorical pretreatment standard is expressed only in terms of pollutant concentrations, an industrial user may request that the City convert the limits to equivalent mass limits. The determination to convert concentration limits to mass limits is within the discretion of the Superintendent. The City may establish equivalent mass limits only if the industrial user meets all the conditions set forth in Subsection (5)(a) below.
5.
Equivalent mass limits.
a.
To be eligible for equivalent mass limits, the industrial user must:
(1)
Employ or demonstrate that it will employ, water conservation
methods and technologies that substantially reduce water use during
the term of its individual wastewater discharge permit;
(2)
Currently use control and treatment technologies adequate to
achieve compliance with the applicable categorical pretreatment standard
and not have used dilution as a substitute for treatment;
(3)
Provide sufficient information to establish the facility's actual
average daily flow rate for all waste streams, based on data from
a continuous effluent flow monitoring device, as well as the facility's
long-term average production rate. Both the actual average daily flow
rate and the long-term average production rate must be representative
of current operating conditions;
(4)
Not have daily flow rates, production levels or pollutant levels
that vary so significantly that equivalent mass limits are not appropriate
to control the discharge; and
(5)
Have consistently complied with all applicable categorical pretreatment
standards during the period prior to the industrial user's request
for equivalent mass limits.
b.
An industrial user subject to equivalent mass limits must:
(1)
Maintain and effectively operate control and treatment technologies
adequate to achieve compliance with the equivalent mass limits;
(2)
Continue to record the facility's flow rates through the use
of a continuous effluent flow monitoring device;
(3)
Continue to record the facility's production rates and notify
the Superintendent whenever production rates are expected to vary
by more than twenty percent (20%) from its baseline production rates
determined in Subparagraph (5)(a)(3) of this Section. Upon notification
of a revised production rate, the Superintendent will reassess the
equivalent mass limit and revise the limit as necessary to reflect
changed conditions at the facility; and
(4)
Continue to employ the same or comparable water conservation
methods and technologies as those implemented pursuant to Subparagraph
(5)(a)(1) of this Section so long as it discharges under an equivalent
mass limit.
c.
When developing equivalent mass limits, the Superintendent:
(1)
Will calculate the equivalent mass limit by multiplying the
actual average daily flow rate of the regulated process(es) of the
industrial user by the concentration-based daily maximum and monthly
average standard for the applicable categorical pretreatment standard
and the appropriate unit conversion factor;
(2)
Upon notification of a revised production rate, will reassess
the equivalent mass limit and recalculate the limit as necessary to
reflect changed conditions at the facility; and
(3)
May retain the same equivalent mass limit in subsequent individual wastewater discharger permit terms if the industrial user's actual average daily flow rate was reduced solely as a result of the implementation of water conservation methods and technologies and the actual average daily flow rates used in the original calculation of the equivalent mass limit were not based on the use of dilution as a substitute for treatment pursuant to Section 725.100. The industrial user must also be in compliance with the Section regarding the prohibition of bypass.
[Ord. No. 3393 §1, 4-20-2010]
Users must comply with Missouri State Pretreatment Standards
codified at 10 Mo. Code of State Regulations 20-6.100 et seq. as promulgated
under Section 644.006, RSMo., the "Missouri Clean Water Act".
[Ord. No. 3393 §1, 4-20-2010; Ord.
No. 3995, 8-1-2023]
A.
The
Superintendent established local limits pursuant to 40 CFR 403.5(c).
The City may also establish Best Management Practices (BMPs) to control
certain pollutants. The City will provide public notice and an opportunity
to respond to interested parties [40 CFR 403.5(c)(3)]. The City may
also set limits as instantaneous maximums or for other durations.
The local limits may be developed under guidelines set forth in the
Environmental Protection Agency's "Local Limits Development Guidance"
document EPA 833-R-04-002A (July 2004).
[Ord. No. 3393 §1, 4-20-2010]
The City reserves the right to establish, by ordinance or in
individual wastewater discharge permits, more stringent standards
or requirements on discharges to the POTW consistent with the purpose
of this Chapter.
[Ord. No. 3393 §1, 4-20-2010]
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.
