A.
General prohibitions. No discharger shall introduce or cause to be
introduced any pollutant that causes pass through or interference
at the WRRF.
B.
Specific prohibitions. No discharger shall introduce or cause to
be introduced into the WRRF the following pollutants, substances,
or wastewater:
(1)
Pollutants which create a fire or explosive hazard in the WRRF,
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)
Any wastewater having a pH less than 6.0, greater than 10 or
having any other corrosive property capable of causing damage or hazard
to structures, equipment or personnel of the wastewater facilities;
(3)
Solid or viscous substances in amounts which will cause obstruction
of the flow in the WRRF resulting in interference;
(4)
Any wastewater containing toxic pollutants in sufficient quantity,
or 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 in the Saco WRRF;
(5)
Any substance which will cause the Saco WRRD to violate its
MEPDES permit or State of Maine waste discharge license;
(6)
Any substance which may cause the Saco WRRF's effluent
or residues, biosolids or scums to be unsuitable for reclamation and
reuse or to interfere with the reclamation process;
(7)
Wastewater having a temperature greater than 140° F. (60°
C.), or which will inhibit biological activity in the treatment plant
resulting in interference.;
(8)
Any slug released in a single extraordinary discharge episode
of such volume or strength as to cause interference to the Saco WRRF;
(9)
Any flow that, by the nature and duration of its discharge,
would cause hydraulic overloading conditions in the treatment works;
(10)
Petroleum oil, nonbiodegradable cutting oil, or products of
mineral oil origin, in amounts that will cause interference or pass
through;
(11)
Pollutants which result in the presence of toxic gases, vapors,
or fumes within the treatment works in a quantity that may cause acute
worker health and safety problems;
(12)
Trucked or hauled pollutants, except at discharge points designated
by the Director in accordance with this chapter;
(13)
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;
(14)
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 Saco WRRF
effluent;
(15)
Wastewater containing any radioactive wastes or isotopes except
in compliance with applicable state or federal regulations;
(16)
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 Director;
(17)
Biosolids, screenings, or other residues from pretreatment of
nonresidential wastes;
(18)
Medical wastes, except as specifically authorized by the Director
in a wastewater discharge permit (WDP);
(19)
Wastewater causing, alone or in conjunction with other sources,
the Saco WRRF effluent to fail whole effluent toxicity testing;
(20)
Detergents, surface-active agents, or other substances which
have potential to cause excessive foaming in the Saco WRRF;
(21)
Fats, oils, or greases of animal or vegetable origin in concentrations
greater than 100 mg/l;
(22)
Any wastewater which causes a hazard to human life or creates
a public nuisance.
(23)
Pollutants, substances, or wastewater prohibited by this chapter
shall not be processed or stored in such a manner that they could
be discharged to the Saco WRRF.
(24)
The limits fixed herein may be used as a guide in design and
plant control but may be altered by the WRRD as required or authorized
by state or federal law.
A.
All dischargers shall meet all state, federal and/or City limitations
and requirements to which they are subject. In the case of conflicting
standards, the discharger shall conform to the most stringent limitation
or requirement.
A.
All measurements, tests and analyses of the characteristics of waters
and wastes to which reference is made in this article shall be determined
in accordance with the latest edition of Standard Methods for the
Examination of Water and Wastewater, published by the American Public
Health Association, and shall be determined at the control manhole
provided or upon suitable samples taken at the control manhole. In
the event that no specific manhole has been required, the control
manhole shall be considered to be the nearest downstream manhole in
the sewer to the point at which the building sewer is connected. Sampling
shall be carried out by customarily accepted methods to reflect the
effect of constituents upon the water resource recovery facilities
and to determine the existence of hazards to life and property. (The
analyses involved will determine whether a twenty-four-hour composite
of all outfalls of a premises is appropriate or whether a grab sample
or samples should be taken. Normally, but not always, BOD and suspended
solids analyses are obtained from twenty-four-hour composites of all
outfalls, whereas pHs are determined from periodic grab samples.)
B.
All nonresidential dischargers into a public sewer shall perform
such monitoring of their discharge as the Director and/or designee
may reasonably require, including installation, use and maintenance
of monitoring equipment, keeping records and reporting results of
such monitoring to the Director. Such records shall be made available
upon request by the Director to other agencies having jurisdiction
over discharges to receiving waters.
A.
The Director is authorized to establish local limits for nonresidential
dischargers to the City sewer, pursuant to the Clean Water Act.
B.
The following limits are established to protect against pass through
and interference. No person shall discharge wastewater containing
in excess of the following, unless otherwise noted in a WDP.
|
[350] mg/L
|
BOD5*
|
|
[0.001] mg/L
|
Mercury
|
|
[100] mg/L
|
Oil and grease
|
|
[250] mg/L
|
Total suspended solids*
|
|
* Surcharges may be imposed on mass loading limits set forth
in a wastewater discharge permit, as specified.
|
C.
The above limits apply at the point where the wastewater is discharged
to the sewer system.
D.
The Director may impose mass limitation in addition to concentration-based
limitations above.
E.
The Director may develop BMPs, by ordinance or in a wastewater discharge
permit, to implement local limits and requirements of this chapter.
The City reserves the right to establish more stringent standards
or requirements on discharges to the WRRF, consistent with the purpose
of this chapter.
No nonresidential discharge of wastewater to the City sewer
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. (Reference:
ME DEP Rules, Chapter 528, Section 7(d), Dilution Prohibited as Substitute
for Treatment)
No statement contained in this chapter shall be construed as
preventing any agreement or arrangement between the City and any discharger
whereby waste of unusual strength or character may be accepted by
the City for treatment, subject to payment therefor by the nonresidential
discharger, provided that such agreement does not contravene any requirement
of existing federal laws and is compatible with applicable charges
and fees.
A.
Septic tank waste may be introduced into the Saco WRRF only at locations
and at such times established by the Director. Such waste shall not
violate this chapter, or any other requirements established by the
City, and must have originated from within City boundaries. The Director
may require septic tank waste haulers to obtain a WDP.
B.
Nonresidential hauled wastes may be introduced into the Saco WRRF
only at locations and at such times as shall be established by the
Director. The Director may require generators and/or haulers of nonresidential
wastes to obtain a wastewater discharge permit. The Director also
may prohibit the disposal of hauled nonresidential waste. The discharge
of hauled nonresidential waste is subject to all applicable requirements
of this chapter. The Director or designee may collect samples of each
hauled load to ensure compliance with applicable standards. The Director
may require the nonresidential waste hauler to provide a waste analysis
of any load prior to discharge.
C.
All waste haulers shall provide a waste-tracking form provided by
the WRRD, for every load. (Cross-reference: State of Maine DEP Rules,
Chapter 555, Standards for the Addition of Transported Wastes to Wastewater
Treatment Facilities)
A.
Bypass restriction.
(1)
Bypass is prohibited, unless:
(a)
Bypass is unavoidable to prevent loss of life, personal injury,
or severe property damage;
(b)
There were no feasible alternatives to the bypass, such as the
use of auxiliary treatment facilities, retention of untreated wastes,
or maintenance during normal periods of equipment downtime. This condition
is not satisfied if adequate back-up equipment should have been installed
in the exercise of reasonable engineering judgment to prevent a bypass
which occurred during normal periods of equipment downtime or preventive
maintenance; and
B.
Bypass notification requirements.
(1)
Anticipated bypass. If a discharger knows in advance of the
need for a bypass, it shall submit prior notice to the Director, at
least 10 days before the date of the bypass, if possible.
(2)
Unanticipated bypass. A discharger shall submit verbal notice
to the Director of an unanticipated bypass that exceeds applicable
permit limits or pretreatment standards within 24 hours from the time
it becomes aware of the bypass. A written submission shall also be
provided within five days of the time the discharger becomes aware
of the bypass. The written submission shall contain a description
of the bypass and its cause; the duration of the bypass, including
exact dates and times, and, if the bypass has not been corrected,
the anticipated time it is expected to continue; and steps taken or
planned to reduce, eliminate, and prevent reoccurrence of the bypass.
The Director may waive the written report on a case-by-case basis
if the oral report has been received within 24 hours.
(3)
The Director may approve an anticipated bypass, after considering
its adverse effects, if the Director determines that it will meet
the three conditions above.
