[Ord. No. 19-07, 2-11-2019]
The objective of this Article is to aid in preventing the introduction
and accumulation of fats, oils, and greases into the municipal wastewater
system, which will or tend to cause or contribute to sanitary sewer
blockages and obstructions. This Article is intended to protect the
health, welfare, and safety of the public and the environment by regulating
Food Service Establishments and other industrial or commercial establishments
generating wastewater containing fats, oils or greases thereby minimizing
their impact on the City's wastewater system and treatment plant.
This Article regulates such Users by requiring that Grease Interceptors
and other approved strategies be installed, implemented, and maintained
in accordance with the provisions hereof.
[Ord. No. 19-07, 2-11-2019]
The following terms shall apply when used in this Article:
The concentration based numeric value that the Grease Interceptor
effluent, at the device's outlet tee and prior to mixing with
any other waste water from the contributing establishment's property,
are expected to achieve on a consistent or stipulated basis.
One (1) or more interceptors receiving FOG laden wastewater
from more than one (1) establishment. Common interceptors may be located
at shopping centers, malls, entertainment complexes, sporting arenas,
hotels, multi-tenant "flex" spaces, mixed-use spaces, and other sites
where multiple establishments are connected to a single Grease Interceptor.
The owner of the property on which the common Grease Interceptor is
located shall be primarily responsible for the maintenance, upkeep,
and repair of the common interceptor.
The Waste Water Department Head, his/her designee, or such
other person or persons as may be designated by the City Administrator
from time to time.
Organic polar compounds derived from animal and/or plant
sources that contain multiple carbon chain triglyceride molecules.
These substances are detectable and measurable using analytical test
procedures established in 40 CFR 136, as may be amended from time
to time. All are sometimes referred to herein as "grease" or "greases"
or "FOG."
Any commercial, industrial, or institutional establishment
engaged in activities of preparing, serving, or otherwise making available
for consumption foodstuffs and that use one (1) or more of the following
preparation activities: Cooking by frying (all methods), baking (all
methods), grilling, sauteing, rotisserie cooking, broiling (all methods),
boiling, blanching, roasting, toasting, or poaching, and infrared
heating, searing, barbecuing, and any other food preparation or serving
activity that produces a consumable food product in or on a receptacle
requiring washing to be reused.
An indoor mechanical system designed to remove FOG by physical
separation from wastewater.
A device for separating waterborne greases and grease complexes
from wastewater and retaining such greases and grease complexes prior
to the wastewater exiting the trap and entering the sanitary sewer
collection and treatment system. Grease traps also serve to collect
solids that settle, generated by and from activities that subject
Users to this Article, prior to the water exiting the trap and entering
the sanitary sewer collection and treatment system. Grease traps and
interceptors are sometimes referred to herein as "grease interceptors."
The design features of a Grease Interceptor and its ability
or volume required to effectively intercept and retain greases and
settled solids from grease-laden wastewaters discharged to the public
sanitary sewer.
Those establishments primarily engaged in the preparation
of precooked foodstuffs that do not include any form of cooking, but
that may produce a consumable food product in or on a receptacle requiring
washing to be reused.
The individual identified by a User that is responsible for
cleaning/pumping, setting up inspections and keeping all documents
on file.
Program confirmation documentation issued by the Director.
The User is required to keep the Program Acknowledgement Certificate
on premises and produce it upon request of the City of Fredericktown.
Any third party not in the employment of the User that performs
maintenance, repair, and other services on a User's Grease Interceptor
at the User's directive.
Any person or entity, including those located outside of
jurisdictional limits of the City, who contributes, causes, or permits
the contribution or discharge of wastewater into the City's wastewater
system, including persons who contribute such wastewater from mobile
sources, such as those who discharge hauled wastewater. Users include
property owners who provide Common Interceptors for one (1) or more
independent establishments, including tenants. User also includes
any owner or occupant of property of premises where the City's
wastewater system is available and reasonably accessible, whether
connected to the wastewater system or not.
[Ord. No. 19-07, 2-11-2019]
A.
Grease Interceptors shall be installed and maintained, at the User's
expense, when a User operates a Food Service Establishment. All grease
interceptors must meet the requirements of the International Plumbing
Code as adopted by the City. If there is a conflict between the terms
of this Article and the adopted version of the International Plumbing
Code, the International Plumbing Code shall control.
1.
All new establishments are subject to grease interceptor requirements,
2.
Existing Food Service Establishments:
a.
All existing FSEs determined by the Director to have a potential
to adversely impact the City's sewer system will be notified
of their obligation to install a grease interceptor within the specified
period set forth in the notification letter.
b.
All existing establishments with planned modification with a
building permit evaluation of fifty thousand dollars ($50,000.00)
or more will be required to include plans to comply with the grease
interceptor requirements. These facilities must obtain approval from
the Director for grease interceptor sizing prior to submitting plans
for a building permit.
3.
Grease Interceptors may be required in Non-Cooking Establishments
or cold dairy and frozen foodstuffs establishments and other industrial
or commercial establishments when the establishment generates wastewater
containing fat or grease and the Director determines an interceptor
is necessary to prevent contribution or accumulation of grease to
the sanitary sewer collection and treatment system.
B.
All wastewater containing FOG from a Food Service Establishment shall
be directed to and through FOG management equipment. Sanitary facilities,
such as toilets and urinals, and other similar fixtures containing
domestic waste shall not discharge to the Grease Interceptor.
C.
All Food Service Establishments required to have FOG management equipment
shall submit the design and specifications to the City Building Inspector
prior to installation for review and approval as part of the building
process. All costs and related expenses associated with the installation
and connection of the FOG management equipment shall be borne by the
FSE. Proper operation, maintenance and repair shall be solely at the
User's expense. The FSE shall indemnify the City and its agents
for any loss or damage that may directly or indirectly occur due to
failure to install or improper maintenance and usage of the FOG management
equipment. The FSE shall name an Operator responsible for cleaning/pumping,
setting up inspections and keeping all documents on file.
[Ord. No. 19-07, 2-11-2019]
A.
All Grease Interceptors shall be of a type, design, and capacity
approved by the Director and shall be readily and easily accessible
for maintenance and repair, including cleaning and for City inspection.
B.
No valve or piping bypass equipment that could allow the discharge
of food preparation wastewater (containing FOG) to directly enter
the building sewer shall be allowed.
C.
The following formula shall be used in determining the size of interceptor
for New Food Service Establishments: (Outdoor Units)
1.
Food Preparation Establishments that have a seating capacity
of two hundred fifty (250) or less shall have a FOG Interceptor with
a minimum size of one thousand (1,000) gallons.
2.
Food Preparation Establishments that have a seating capacity
of two hundred fifty (250) to three hundred fifty (350) shall have
a FOG Interceptor with a minimum size of one thousand five hundred
(1,500) gallons.
3.
Food Preparation Establishments that have a seating capacity
in excess of three hundred fifty (350) shall have a FOG Interceptor
with a minimum size of two thousand (2,000) gallons.
D.
The following formula shall be used in determining the size of interceptor
for Existing Food Service Establishments: (Indoor Units have to be
cleaned weekly if not daily)
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General Procedures:
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To Determine the Flow Rate of Each Sink:
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1.
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Calculate the capacity of the sink in cubic inches:
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_____(length) x _____(width) x _____(depth) =_____cu. in.
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2.
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Convert the capacity from cubic inches to gallons per minute
(GPM):
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_____ cu. in./231 = _____ GPM.
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3.
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Adjust for displacement: _____ GPM x 0.075 = _____ GPM.
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4.
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Result is the flow rate required to drain the sink in one (1)
minute
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*Discharge from spray hoods is determined by the flow rate of
the hood.
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*It is not recommended to pass commercial dishwashers through
an interceptor.
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Sizing for Multiple Fixtures:
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1.
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Determine the flow rate for each fixture to be serviced by the
interceptor.
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2.
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Add together 100% of the largest flow rate, fifty percent (50%)
of the second largest, and twenty-five percent (25%) of all others.
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3.
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Result is the recommended flow rate of the interceptor.
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Example:
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1.
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Fixture A: 35 GPM Flow Rate
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2.
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35 GPM (A) x 100% = 35 GPM
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Fixture B: 26 GPM Flow Rate
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26 GPM (B) x 50% = 13 GPM
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Fixture C: 18 GPM Flow Rate
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30 GPM (C + D) x 25% = 7.5 GPM
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Fixture D: 12 GPM Flow Rate
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Total Flow Rate: 55.5 GPM
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E.
No non-grease-laden sources are allowed to be connected to sewer
lines intended for Grease Interceptor service.
F.
Access manholes shall have an installed diameter of twenty-four (24)
inches, a maximum weight of fifty (50) pounds, and shall be provided
over each chamber, interior baffle wall, and each sanitary tee. The
access penetrations, commonly referred to as "risers" into the Grease
Interceptor shall also be, at a minimum, twenty-four (24) inches in
diameter. The access manholes shall extend at least to finished grade
and be designed and maintained to prevent water inflow or infiltration.
The manholes shall also have readily removable covers to facilitate
inspection, grease removal, and wastewater sampling activities.
G.
The site of the FOG Interceptor shall be at the discretion of the
Public Works and Building Departments.
H.
All FOG Interceptors shall be inspected upon installation or before
being covered up, by a representative of the Public Works and Building
Departments.
[Ord. No. 19-07, 2-11-2019]
A.
Where FOG are by-products of food preparation and/or cleanup, reasonable
efforts shall be made to separate waste FOG into a separate container
for proper and legal waste disposal. Except as contained in by-products
of food preparation and/or cleanup, waste FOG shall not be discharged
to any drains or grease interceptors. Such waste shall be placed in
a container designed to hold such waste and either used by industry
or disposed of in a proper and legal manner.
B.
The influent to interceptors shall not exceed one hundred forty degrees
Fahrenheit (140° F.). The temperature at the interceptor's
flow control device inspection port shall be considered equivalent
to the temperature of the influent.
C.
Waste shall enter the grease interceptor only through the inlet flow
control device, then the inlet pipe.
D.
Where food-waste grinders (garbage disposals) are installed, the
waste from these units shall also discharge directly to the grease
interceptor, and not directly to the City sewer system.
E.
No food service establishment, with or without FOG management equipment,
shall discharge, cause to be discharged, or place objects to be discharged
with any wastewater with an animal/vegetable FOG concentration in
excess of one hundred (100) milligrams per liter (100 mg/l), as determined
by the approved analytical test for total recoverable oil and grease
derived from animal/vegetable sources listed in 40 CFR 136, or in
concentrations and/or quantities which will harm the City's wastewater
system as directed by the Public Works Department.
F.
The operator shall make every practical effort to reduce the amount
of FOG discharged to the City's wastewater system.
[Ord. No. 19-07, 2-11-2019]
A.
All Grease Interceptors shall be serviced and emptied of accumulated
waste content as required in order to maintain Minimum Design Capability
or effective volume of the Grease Interceptor, but not less often
than every ninety (90) days or as permitted in a valid program modification.
All cleaning/pumping schedules shall be set by the Director. Users
who are required to pass wastewater through a Grease Interceptor shall:
1.
Provide for a minimum hydraulic retention time of twenty-four
(24) minutes at actual peak flow between the influent and effluent
baffles, with twenty-five percent (25%) of the total volume of the
Grease Interceptor being allowed for any food-derived solids to settle
or accumulate and floatable grease derived materials to rise and accumulate,
identified hereafter as a solids blanket and grease cap respectively.
2.
Remove any accumulated grease cap and solids blanket as required,
but at intervals of not longer than ninety (90) days at the User's
expense, or in accordance with a valid program modification or other
Director's requirements. Grease Interceptors shall be kept free
of inorganic solid materials, such as grit, rocks, gravel, sand, eating
utensils, cigarettes, shells, towels, rags, etc., which could settle
into this solids blanket and thereby reduce the effective volume of
the Grease Interceptor.
3.
Not permit hot water, chemicals and/or biological additives
to be used as an aid in cleaning that could cause the FOG fractions
to be released from the interceptor into the City's wastewater
system.
B.
Indoor Grease Interceptors shall be completely evacuated on a more
frequent basis than Outdoor Grease Interceptors and may require weekly
or daily cleaning. Outdoor interceptors shall be completely evacuated
a minimum of every one hundred and eighty (180) days, or more frequently
when:
1.
Twenty-five percent (25%) or more of the wetted height of the
grease trap or Grease Interceptor, as measured from the bottom of
the device to the invert of the outlet pipe, contains floating materials,
sediment, oils or greases; or
2.
The discharge exceeds BOD, COD, TSS, FOG, pH, or other pollutant
levels established by the Public Works Department; or
3.
If there is a history of non-compliance.
C.
The Operator shall be responsible for the proper removal and disposal, by appropriate means, of the collected material removed from the FOG Management Equipment. The User shall operate and maintain the Grease Interceptor to achieve and consistently maintain any applicable grease Action Level. "Consistent" shall mean any wastewater sample taken from such Grease Interceptor must meet the terms of numerical limit attainment described in Section 725.230.
D.
The use of biological or other additives as a grease degradation
or conditioning agent is permissible only upon prior written approval
of the Director. Any User using biological or other additives shall
maintain the trap or interceptor in such a manner that attainment
of any grease wastewater, Action Level, solids blanket or grease cap
criteria, goal or directive, as measured from the Grease Interceptor
outlet or interior, is consistently achieved.
E.
The use of automatic grease removal systems is permissible only upon
prior written approval of the Director and the City's Building
Inspector. Any User using a Grease Interceptor located on the interior
of the site shall be subject to any operational requirements set forth
by the City of Fredericktown. Any User using this equipment shall
operate the system in such a manner that attainment of the grease
wastewater discharge limit, as measured from the unit's outlet,
is consistently achieved as required by the Director.
F.
The Director may make determinations of Grease Interceptor adequacy
need, design, appropriateness, application, location, modification(s),
and conditional usage based on review of all relevant information
regarding Grease Interceptor performance, facility site and building
plan review by all regulatory reviewing agencies and may require repairs
to, or modification or replacement of Grease Interceptors.
[Ord. No. 19-07, 2-11-2019]
A.
The User is required to keep a Program Acknowledgement Certificate
on premises and produce it upon request of the City of Fredericktown.
B.
The User shall maintain a written manifest of Grease Interceptor
maintenance for three (3) years. All such records must be available
for inspection by the City at all times. Copies shall be given to
the Inspector during scheduled inspections. The User manifest shall
include:
1.
FSE name and physical location;
2.
Date of Grease Interceptor service;
3.
Time of Grease Interceptor service;
4.
Name of Grease Interceptor service company;
5.
Name and signature of Grease Interceptor service company agent
performing said service;
6.
Established service frequency and type of service: full pump
out, partial pump out (type of nature of operations);
7.
Number and size of each Grease Interceptor serviced at FSE location;
8.
Approximated amount, per best professional judgment of contract
Service Provider, of grease and solids removed from each Grease Interceptor;
9.
Total volume of waste removed from each Grease Interceptor;
10.
Destination of removed wastes, food solids, and wastewater disposal;
11.
Signature and date of FSE personnel confirming service completion;
and
12.
Such other information as required by Director.
C.
Persons who collect and transport grease waste shall maintain a record
of each individual collection and deposit. Such records shall be in
the form of a manifest. The manifest shall include:
1.
Name, address, telephone number of transporter;
2.
Name, signature, address, and phone number of the FSE who generated
the waste and the date collected;
3.
Type and amount(s) of waste collected or transported;
4.
Name of responsible person(s) collecting, transporting, and
depositing the waste;
5.
Date and place where the waste was deposited;
6.
Identification (location and Operator) of the facility where
the waste was deposited;
7.
Name and signature of facility on-site representative acknowledging
receipt of the waste and the amount of waste received.
[Ord. No. 19-07, 2-11-2019]
A.
Modifications. A User may request a modification to the following
requirements of this Article. Such request for a modification shall
be in writing and shall provide the information set forth below.
1.
User's Grease Interceptor Pumping Frequency. The Director
may modify the ninety-day Grease Interceptor pump out frequency when
the User provides data, and performance criteria relative to the overall
effectiveness of a proposed alternate and such can be substantiated
by the Director. Proposed alternatives may include: Grease Interceptor
pumping or maintenance matters, bioremediation as a complement to
Grease Interceptor maintenance, Grease Interceptor selection and sizing
criteria, and specialized ware washing procedures. Even if a modification
of the frequency of pumping the Grease Interceptor is granted, an
outdoor Grease Interceptor shall be fully evacuated, cleaned, and
inspected at least once every year and an indoor Grease Interceptor
shall be fully evacuated, cleaned and inspected at least once every
week.
2.
Grease Interceptor Maintenance And Service Procedures. The Director
may modify the method(s) or procedure(s) utilized to service a Grease
Interceptor when the User provides data, and performance criteria
related to the overall effectiveness of a proposed alternate method
or procedure and such can be substantiated by the Director. If a modification
to maintenance and service procedures is permitted it shall be a conditional
discharged permit approval.
3.
Prior Approval. Any modification must be approved by the Director,
in writing, before implementation by the User or the User's designated
Service Provider.
B.
Exemption. A User may request exemption from the standard FOG management
equipment installation when a FOG Interceptor or GRU are impractical.
Each application for exemption shall be individually reviewed. For
example, exemptions may be granted when:
1.
Locations Serving Limited Continental Breakfast: So long as
food is not prepared on site, paper supplies only are used, dairy
products are not discharged to the City's wastewater system from
the location, and no FOG deposits within the wastewater system are
found or originate.
2.
Site Where Catered Meals Are Distributed And Consumed: So long
as all dishes, pans, utensils, etc., are removed and cleaned at an
approved facility with properly operating and sized FOG management
equipment.
3.
FSE Establishments Serving Only Pre-Packaged Foods: So long
as only pre-packaged foods, such as, but not limited to, pre-packaged
ice cream, pre-packaged sandwiches, and pre-packaged fudge unless
such establishments are distributing or disposing of the dairy products
or cleaning dishes, pans or utensils that have contacted FOG material.
C.
Interior Interceptor. If a User documents that conditions exist ("space
constraints") on their establishment site that limit the ability to
locate a Grease Interceptor on the exterior of the establishment,
the User may request an interior location for the interceptor. Such
request shall contain the following information:
1.
Location of public sewer main and easement in relation to available
exterior space outside building.
2.
Existing plumbing layout at or in a site.
3.
A Statement of Understanding, signed by the User or authorized
agent, acknowledging and accepting conditions the Director may place
on permitting an identified interior location. Conditions may include
requirements to use alternative mechanisms, devices, procedures, or
operations relative to an interior location.
4.
Such other information as may be required by the Director.
D.
Grease Recovery Unit. In the event the Direct determines that the
FSE cannot install a Grease Interceptor as required by this Article
due to physical limitations or other extreme circumstances, the FSE
shall install a grease recovery unit.
[Ord. No. 19-07, 2-11-2019]
A.
The User's premises shall be open at all reasonable times to
the Director for the performance of inspections of Grease Interceptor
maintenance practices within the customer's premises.
B.
An on-site inspection shall be performed every ninety (90) days by
an inspector from the City. Inspections shall be set up to coincide
with cleaning/pumping to ensure that all fittings and fixtures inside
the interceptor are in good condition and functioning properly. The
depth of the grease inside the tank shall be measured and recorded
in the maintenance log during every inspection along with any deficiencies.
C.
It shall be unlawful for the User of a FSE to refuse to allow inspectors
to enter its premises during reasonable hours to determine whether
the User is complying with all of the requirements of this Article.
The User shall allow the inspector access to all parts of the premises
for the purpose of inspection, records examination and copying and
the performance of additional duties reasonably required to enforce
this Article.
D.
If the inspector determines that the interceptor is full, immediate
steps shall be taken by the User to pump out and clean the interceptor
as soon as is practicable. The Director or inspector shall make an
evaluation of the advisability of allowing discharge to continue,
and may at his/her discretion order an immediate cessation of all
discharge from the FSE.
The Director will notify the User, in writing, of any violations, corrections required, and date compliance is required which shall be no less than ten (10) days. Procedure for abatement, penalty for violations and appeal procedures are as stated in Chapter 215, Nuisances.
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APPENDIX A TO ARTICLE IV OF CHAPTER 725
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Fog Interceptor Detail
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APPENDIX B TO ARTICLE IV OF CHAPTER 725
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Typical Grease Trap Installations:
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