[Ord. of 5-5-2008]
Users shall provide wastewater treatment as necessary to comply with this Part and shall achieve compliance with all limits, prohibitions, and requirements set out in §§ 16-2.4, 16-2.5 and 16-2.6 of this Part within the time limitations specified by the EPA, the state, or the Superintendent, whichever is more stringent. All facilities required to achieve and maintain compliance shall be provided, operated, and maintained at the user's expense. Detailed plans describing such facilities and operating procedures shall be submitted to the Superintendent for review and shall be acceptable to the Superintendent and the DEP before such facilities are constructed. The review of such plans and operating procedures shall in no way relieve the user from the responsibility of modifying such facilities as necessary to produce a discharge acceptable to the City under the provisions of this Part.
[Ord. of 5-5-2008]
(a)
Whenever deemed necessary to protect the POTW and determine the user's
compliance with the requirements of this Part, the Superintendent
may require users to restrict their discharge during peak-flow periods,
designate that certain wastewater be discharged only into specific
sewers, relocate and/or consolidate points of discharge, separate
sewage waste streams from industrial waste streams, and such other
conditions as may be necessary.
(b)
The Superintendent may require any person discharging into the POTW
to install and maintain, on their property and at their expense, a
suitable storage and flow-control facility to ensure equalization
of flow. An industrial discharge permit may be issued solely for flow
equalization.
(c)
Grease, oil, and sand interceptors shall be provided at the owner's
expense when, in the judgment of the Superintendent, these devices
are necessary for the preliminary treatment of wastewater containing
excessive amounts of grease and oil, or sand, except that such interceptors
shall not be required for residential users. All interception units
shall be of a type and capacity approved by the Superintendent and
shall be so located to be easily accessible for cleaning and inspection.
Such interceptors shall be inspected, cleaned, and repaired regularly,
as needed, by the user at their expense. The owner shall be responsible
for the proper removal and disposal by appropriate means of the captured
materials and shall maintain records of the dates and means of disposal,
which shall be subject to periodic review by the Superintendent. Any
removal and hauling of the collected materials shall be performed
by currently licensed waste disposal firms.
(d)
Users with the potential to discharge flammable substances may be
required to install and maintain an approved combustible gas detection
meter and alarm.
(e)
Where pretreatment or flow-equalizing facilities are provided or
required for any waters or wastes, these devices shall be maintained
continuously to ensure satisfactory and effective operation by the
owner at his expense.
[Ord. of 5-5-2008]
At least once every two years, the Superintendent shall evaluate
whether each significant indirect discharger needs an accidental discharge/slug
control plan. The Superintendent may require any user to develop,
submit for approval, and implement such a plan. Alternatively, the
Superintendent may develop such a plan for any user. An accidental
discharge/slug control plan shall address, at a minimum, the following:
(a)
A description of discharge practices, including nonroutine batch
discharges;
(b)
A description of stored chemicals;
(c)
Procedures for immediately notifying the Superintendent of any accidental or slug discharge, as required by § 16-6.5 of this Part; and
(d)
Procedures to prevent adverse impact from any accidental or slug
discharge. Such procedures include, but are not limited to, inspection
and maintenance of storage areas, handling and transfer of materials,
loading and unloading operations, control of plant site runoff, worker
training, building of containment structures or equipment, measures
for containing toxic organic pollutants, including solvents, and/or
measures and equipment for emergency response.
[Ord. of 5-5-2008]
(a)
The standards required herein are intended to restrict release of
fats, oils and grease (FOG) into the City's wastewater system. Discharges
from restaurants and food preparation establishments and from commercial
and industrial facilities shall provide approved structures for pretreatment
of FOGs. All new construction and changes in use, as herein regulated,
shall make provisions for required pretreatment structures as evidenced
by a letter of approval issued by the District, before issuance of
a building permit.
(c)
For the purposes of this Part, the words "grease trap," "grease separator,"
and "grease interceptor" are used interchangeably. Large, outdoor,
in-ground tanks are referred to as "holding tanks." The owner shall
maintain a log, approved by the Superintendent, of maintenance performed
on grease traps, including date, maintenance performed, and the name
of the person performing the maintenance.
(d)
When required by the Superintendent, the owner(s) of any property
serviced by a building sewer carrying fats, oils or grease (FOG) shall
install a suitable structure, together with necessary valves and other
appurtenances, in the building sewer to facilitate observation, sampling,
and measurement of the wastes. Such structure, when required, shall
be accessibly and safely located and shall be constructed in accordance
with plans approved by the Superintendent and Building Inspector.
The structures for the pretreatment of wastewater containing FOG shall
be sized, supplied, located, installed and maintained as required
by the 2000 Uniform Plumbing Code and the Maine State Internal Plumbing
Code, or as most recently adopted by the City. All pretreatment grease
traps shall be installed, including ball valves and test port, as
outlined in Sketch A. Unless approved by the Superintendent, an outside
structure as shown in Sketch B must be installed in lieu of the internal
structure described above.[1] In either case, the structure shall be installed by the
owner(s) at his expense and shall be maintained by him so as to be
safe and accessible at all times.
[1]
Editor's Note: Sketches A and B are included in an attachment
to this chapter.
(e)
All food preparation establishments discharging into a public sewer
shall perform such pretreatment of their discharges as the Superintendent
or duly authorized employees of the District may reasonably require,
including installation, use and maintenance of monitoring equipment,
keeping records and reporting the results of such monitoring to the
Superintendent, as described above. Such records shall be made available
upon request by the Superintendent to other agencies having jurisdiction
over discharges to the receiving waters. Sampling frequencies for
year-round food preparation establishments shall be on a semiannual
basis or as established by the Superintendent.
(f)
FOG shall not exceed 100 mg/l from any establishment.
(g)
Use of enzymes alone is not acceptable as a FOG treatment method.
The Superintendent may grant permits for combined enzyme/bacteria
treatment methods, where only a sufficient amount of enzymes is used
to act as a catalyst for the bacteria. The Superintendent may require
use of bioremediation, with or without an automatic feed system, at
any location where, in the Superintendent's judgment, a combined enzyme/bacteria
or other treatment method is or will be inadequate as a FOG treatment
method.
(h)
Food preparation businesses and other FOG dischargers must obtain
a grease trap permit from the Superintendent prior to discharge, or
prior to the expiration date of any previously issued permit. Permits
are valid for two years from the date of approval and are not transferable.
Each business for which a grease trap permit is required shall be
charged a fee for such permit in an amount established by the City.
The City will conduct random tests in permitted businesses. In the
event a discharge sample exceeds the above 100 mg/l limitation, the
owner of the food preparation business or other FOG discharger will
be billed the cost for sampling and retesting. Such a failure on two
consecutive tests shall constitute a violation of this Part. A change
in ownership of the food preparation business or other FOG discharger
requires a new application, permit and fee. Applications for renewal
of grease trap permits must be submitted 60 days prior to expiration
date of the existing permit. The permit application can be obtained
from the Superintendent.
