[R.O. 1993 § 710.050; Ord. No.
2669 § 2.1, 2-8-1999]
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.
1.
No user shall introduce or cause to be introduced into the POTW
the following pollutants, substances, or wastewater:
a.
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 than one hundred forty degrees Fahrenheit (140°
F.), sixty degrees Celsius (60° C.), using the test methods specified
in 40 CFR 261.21;
b.
Wastewater having a pH less than 5.0 or more than 9.0, or otherwise
causing corrosive structural damage to the POTW or equipment;
c.
Solid or viscous substances in amounts which will cause obstruction
of the flow in the POTW resulting in interference;
d.
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;
e.
Wastewater having a temperature greater than N/A °F. —
N/A °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.);
f.
Petroleum oil, non-biodegradable cutting oil, or products of
mineral oil origin, in amounts that will cause interference or pass
through;
g.
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;
h.
Trucked or hauled pollutants, except at discharge points designated by the Superintendent in accordance with Section 710.140 of this Chapter;
i.
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;
j.
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;
k.
Wastewater containing any radioactive wastes or isotopes except
in compliance with applicable State or Federal regulations;
l.
Stormwater, surface water, groundwater, 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;
m.
Sludges, screenings, or other residues from the pretreatment
of industrial wastes;
n.
Medical wastes, except as specifically authorized by the Superintendent
in a wastewater discharge permit;
o.
Wastewater causing, alone or in conjunction with other sources,
the treatment plant's effluent to fail a toxicity test;
p.
Detergents, surface active agents, or other substances which
may cause excessive foaming in the POTW;
q.
Fats, oils, or greases of animal or vegetable origin in concentrations
greater than seventy (70.0) mg/l daily or thirty-five (35.0) mg/l
weekly.
2.
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.
[R.O. 1993 § 710.060; Ord. No.
2669 § 2.2, 2-8-1999]
A.
The categorical pretreatment standards found at 40 CFR Chapter 1,
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 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 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 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.
[R.O. 1993 § 710.070; Ord. No.
2669 § 2.3, 2-8-1999]
The City of Malden, Missouri, adopts State pretreatment standards
in accordance with CSR 20-6.100.
[R.O. 1993 § 710.080; Ord. No.
2669 § 2.4, 2-8-1999]
A.
The following pollutant limits are established to protect against
pass through and interference. No person shall discharge wastewater
containing in excess of the following:
|
Daily
|
Monthly
| ||
|---|---|---|---|
|
N/A
|
N/A
|
mg/l
|
arsenic
|
|
N/A
|
N/A
|
mg/l
|
benzene
|
|
N/A
|
N/A
|
mg/l
|
beryllium
|
|
N/A
|
N/A
|
mg/l
|
BOD5
|
|
0.69
|
0.26
|
mg/l
|
cadmium
|
|
0.06
|
0.02
|
mg/l
|
chromium
|
|
3.38
|
2.07
|
mg/l
|
copper
|
|
2.61
|
0.65
|
mg/l
|
cyanide
|
|
0.18
|
0.06
|
mg/l
|
lead
|
|
N/A
|
N/A
|
mg/l
|
mercury
|
|
3.98
|
2.38
|
mg/l
|
nickel
|
|
70.0
|
35.0
|
mg/l
|
oil and grease
|
|
N/A
|
N/A
|
mg/l
|
selenium
|
|
0.43
|
0.24
|
mg/l
|
silver
|
|
N/A
|
N/A
|
mg/l
|
total phenols
|
|
100.0
|
50.0
|
mg/l
|
total suspended solids
|
|
0.24
|
0.08
|
mg/l
|
zinc
|
B.
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 Superintendent may impose mass
limitations in addition to, or in place of, the concentration-based
limitations above.
[R.O. 1993 § 710.090; Ord. No.
2669 § 2.5, 2-8-1999]
A.
The City reserves the right to establish, by ordinance or in wastewater
discharge permits, more stringent standards or requirements on discharges
to the POTW.
B.
The City reserves the right to enter into special agreements with
industrial users setting out special terms under which they may discharge
to the POTW. In no case will a special agreement waive compliance
with a pretreatment standard or requirement. However, the industrial
user may request a net gross adjustment to a categorical standard
in accordance with 40 CFR 403.15. They may also request a variance
from the categorical pretreatment standard from EPA. Such a request
will be approved only if the industrial user can prove that factors
relating to its discharge are fundamentally different from the factors
considered by EPA when establishing that pretreatment standard. An
industrial user requesting a fundamentally different factor variance
must comply with the procedural and substantive provisions in 40 CFR
403.13.
[R.O. 1993 § 710.100; Ord. No.
2669 § 2.6, 2-8-1999]
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.
