(a) General prohibitions.
No user shall introduce or cause
to be introduced into the wastewater treatment plant any pollutant
or wastewater which causes pass-through or interference. These general
prohibitions apply to all users of the wastewater treatment plant
whether or not they are permit holders or SIUs.
(b) Specific prohibitions.
No user shall introduce or cause
to be introduced into the wastewater treatment plant the following
pollutants, substances, or wastewater:
(1) Pollutants which create a fire or explosive hazard in the wastewater
treatment plant, including, but not limited to, waste streams with
a closed-cup flashpoint of less than 140° F (60° C) using
the test methods specified in 40 CFR 261.21;
(2) Wastewater having a pH less than 5.5 or more than 10.0, or otherwise
causing corrosive structural damage to the wastewater treatment plant
or equipment;
(3) Solid or viscous substances in amounts which will cause obstruction
of the flow in the wastewater treatment plant resulting in interference;
(4) Wastewater having a temperature greater than 150° F (49°
C), or which will inhibit biological activity in the treatment plant
resulting in interference;
(5) Petroleum oil, nonbiodegradable cutting oil, or products of mineral
oil origin, in amounts that will cause interference or pass-through;
(6) Pollutants which result in the presence of toxic gases, vapors, or
fumes within the wastewater treatment plant in a quantity that may
cause acute worker health and safety problems;
(7) Trucked or hauled pollutants, except at discharge points designated
by the superintendent in accordance with section __________ [3.2]
of this article;
(8) Noxious or odorous liquids, gases, solids, or other wastewater which,
either singly or by interacting with other wastewater, is sufficient
to create a public nuisance or a hazard to life, including pesticides,
herbicides and fungicides;
(9) Wastewater which imparts color which cannot be removed by the treatment
process, such as, but not limited to, dye waste and vegetable tanning
solutions, which consequently imparts color to the treatment plant
effluent;
(10) Wastewater containing any radioactive wastewater or isotopes, except
in compliance with applicable state or federal regulations;
(11) Stormwater, surface water, groundwater, artesian well water, roof
runoff, subsurface drainage, swimming pool drainage, condensate, deionized
water, noncontact cooling water, and unpolluted wastewater, unless
specifically authorized by the superintendent;
(12) Sludges, screening, or other residues from the pretreatment of industrial
wastes;
(13) Medical wastes, except as specifically authorized by the superintendent
in a wastewater discharge permit;
(14) Wastewater causing, alone or in conjunction with other sources, the
treatment plant’s effluent to fail a toxicity test;
(15) Detergents, surface-active agents, or other substances which may
cause excessive foaming in the treatment plant.
(c) Handling of prohibited substances.
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 wastewater
plant.
(Ordinance 940308, sec. 2.1, adopted 3/8/94)
All users of the wastewater collection system which meet the
definitions of categorical industries in the national categorical
pretreatment standards shall pretreat their industrial wastewater
if the standards require them to do so. The categorical pretreatment
standards found at 40 CFR chapter I, subchapter N, parts 405-471,
are hereby incorporated. These federal regulations apply to specific
industries to limit the amount of pollutants discharged to the public
wastewater collection and treatment system.
(Ordinance 940308, sec. 2.2, adopted 3/8/94)
(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:
|
Instantaneous Maximum Allowable Discharge Limit
(mg/l)
|
Maximum for 24-hour Composite Sample
(mg/l)
|
---|
Arsenic
|
0.05
|
0.01
|
Barium
|
5.0
|
1.0
|
BOD
|
2,000
|
1,000
|
Cadmium
|
0.7
|
0.1
|
Chromium
|
5.0
|
1.0
|
Copper
|
4.5
|
1.0
|
Cyanide
|
2.0
|
0.5
|
Lead
|
0.1
|
0.02
|
Mercury
|
0.005
|
0.002
|
Nickel
|
1.0
|
0.2
|
O&G
|
400
|
200
|
Selenium
|
0.4
|
0.1
|
Silver
|
1.0
|
0.2
|
TSS
|
2,000
|
1,000
|
Zinc
|
5.0
|
1.0
|
(b) The above limits apply at the point where the wastewater is discharged
to the public collection system. 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 limitation above.
(c) The city reserves the right to establish, by ordinance or in wastewater
discharge permits, more stringent standards or requirements on discharges
to the treatment plant.
(Ordinance 940308, sec. 2.3, adopted 3/8/94)
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 which
are using dilution to meet applicable pretreatment standards or requirements,
or in other cases when the imposition of mass limitations is appropriate.
(Ordinance 940308, sec. 2.4, adopted 3/8/94)