[Ord. No. 8020, 11-13-2017]
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, waste streams with a closed-cup flash
point of less that one hundred forty degrees Fahrenheit (140°
F.) (60° C.) using the test methods specified in 40 CFR 261.21.
2.
Wastewater having a p.H. less that 5.5 or greater than 9.5,
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 one (1) inch or two and one-half (2.5) 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 that one hundred four
degrees Fahrenheit (104° F.) or forty degrees Celsius (40°
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.) (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, except at the discharge points
designated by the Wastewater Collection Superintendent in accordance
with the procedures of this Chapter.
9.
Wastewater containing any radioactive wastes or isotopes except
in compliance with applicable State or Federal regulations.
10.
Swimming pool drainage, condensate, deionized water, non-contact
cooling water, and unpolluted wastewater, unless specifically authorized
by the Wastewater Treatment Superintendent.
11.
Sludges, screenings, or other residues from the pretreatment
of industrial wastes.
12.
Medical wastes, except as specifically authorized by the Wastewater
Treatment Superintendent in a wastewater discharge permit.
13.
Detergents, surface-active agents, or other substances which
may cause excessive foaming in the POTW.
14.
Fats, oils, greases of animal or vegetable origin in concentrations
greater than one hundred (100) mg/l.
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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.
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[Ord. No. 8020, 11-13-2017]
A.
The categorical pretreatment standards found at 40 CFR Chapter I
Subchapter N, Parts 405-471 are hereby incorporated.
1.
Where a categorical pretreatment standard is expressed only
in terms of either the mass or the concentration of a pollutant in
wastewater, the Wastewater Treatment Superintendent may impose equivalent
concentration or mass limits in accordance with 40 CFR 403.6(c).
2.
When wastewater subject to a categorical pretreatment standard
is mixed with wastewater not regulated by the same standard, the Wastewater
Treatment Superintendent shall impose an alternate limit using the
combined waste stream formula in 40 CFR 403.6(e).
3.
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.
4.
A user may obtain a net gross adjustment to a categorical standard
in accordance with 40 CFR 403.15.
[Ord. No. 8020, 11-13-2017]
The Missouri State Pretreatment Standards are hereby incorporated
by reference as if fully set forth herein. A copy of said Standards
is located and may be reviewed at the Office of Public Works, City
Hall, 415 North Market Street, Maryville, Missouri.
[Ord. No. 8020, 11-13-2017; Ord. No. 8116, 8-13-2018]
The following pollutant limits are established to protect against
pass-through and interference. No person shall discharge wastewater
containing in excess of the following [instantaneous maximum allowable
limits]:
|
Pollutant
|
Limit
|
Pollutant
|
Limit
|
|---|---|---|---|
|
Arsenic
|
0.269 mg/l
|
zinc
|
2.986 mg/l
|
|
p.H.
|
>=5.5, <=9.5
|
cadmium
|
0.077 mg/l
|
|
BOD5
|
See below
|
copper
|
0.47 mg/l
|
|
chromium
|
6.026 mg/l
|
lead
|
0.183 mg/l
|
|
mercury
|
0.001 mg/l
|
nickel
|
1.117 mg/l
|
|
oil and grease
|
75 mg/l
|
silver
|
0.205 mg/l
|
|
molybdenum
|
0.249 mg/l
|
total suspended solids
|
805 mg/l
|
|
cyanide
|
1.072 mg/l
|
selenium
|
0.121 mg/l
|
|
BOD5 shall not exceed one thousand one
hundred forty-one (1,141) pounds per day and shall be distributed
at the discretion of the pretreatment coordinator via pretreatment
program permits to each significant industrial user as necessary.
The sum total of each permitted limit for BOD5 shall not exceed the mass value of one thousand one hundred forty-one
(1,141) pounds per day. At the discretion of the pretreatment coordinator
BOD5 limits established in pretreatment permits
may be imposed as BOD5 concentrations using
appropriate conversion methods.
|
|
The above limits apply at the point where the wastewater is
discharged to the POTW. All concentrations for metallic substances
are for "total" metal unless indicated otherwise. The Wastewater Treatment
Superintendent may impose mass limitations in addition to, or in place
of, the concentration-based limitations above.
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[Ord. No. 8020, 11-13-2017]
The City of Maryville reserves the right to establish, by ordinance
or in wastewater discharge permits, more stringent standards or requirements
on discharges to the POTW.
[Ord. No. 8020, 11-13-2017]
No user shall 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 Wastewater Treatment 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.
