[R.O. 2011 § 710.660; Ord. No. 17-184 § 1, 9-20-2017]
To aid in the prevention of sanitary
sewer blockages and obstructions from contributions and accumulation
of fats, oils and greases into the Publicly Owned Treatment Works
(POTW) from industrial or commercial establishments, particularly
food preparation and serving facilities.
[R.O. 2011 § 710.670; Ord. No. 17-184 § 1, 9-20-2017]
For purposes of this Article, the
following definitions shall apply unless the context clearly indicates
or requires a different meaning.
The United States Environmental Protection Agency.
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 the United States Code of Federal Regulations
40 CFR 136, as may be amended from time to time. All are sometimes
referred to herein as grease or greases.
Those establishments primarily engaged in activities of preparing,
serving or otherwise making available for consumption by the public
such as restaurant, commercial kitchen, caterer, hotel, school, hospital,
prison, correctional facility and care institution. These establishments
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. Non-cooking establishments that are primarily
engaged in the preparation of precooked foodstuffs that do not require
any form of cooking are considered food service establishments. These
include cold dairy and frozen foodstuffs preparation and serving establishments.
Also included are infrared heating, searing, barbecuing and any other
food preparation activity that produces a hot, non-drinkable food
product in or on a receptacle that requires washing.
A structure or device designed for the purpose of removing
and preventing fats, oils and grease from entering the POTW. These
devices are often below-ground units in outside areas and are built
as two- or three-chamber baffled tanks.
A device for separating and retaining waterborne greases
and grease complexes prior to the wastewater exiting the trap and
entering the POTW. Such traps are typically compact under-the-sink
units that are near food preparation areas.
The design features of a grease interceptor and its ability
or volume required to effectively intercept and retain greases from
grease-laden wastewaters discharged to the POTW.
A treatment works as defined by Section 212 of the EPA Clean
Water Act.[1] This definition includes any devices or systems used in
the collection, storage, treatment, recycling and reclamation of sewage
or industrial wastes of a liquid nature and any conveyances which
convey wastewater to a treatment facility.
A device designed and installed to separate and retain for
removal, by automatic or manual means, deleterious or undesirable
matter from normal wastes while permitting normal sewage or waste
to discharge to the POTW by gravity. (Vessel may also be referred
to as a settling tank or grit trap.)
Any person, including those located outside the jurisdictional
limits of the City, who contributes, causes or permits the contribution
or discharge of wastewater into the POTW.
[1]
Editor's Note: See 33 U.S.C. § 1292.
[R.O. 2011 § 710.680; Ord. No. 17-184 § 1, 9-20-2017]
No User shall allow wastewater discharge
concentration from subject grease interceptor, oil and water separator,
grease trap or alternative pretreatment technology to exceed one hundred
(100) milligrams per liter, as determined using protocols specified
in 40 CFR Part 136 and appropriate EPA guidance.
[R.O. 2011 § 710.690; Ord. No. 17-184 § 1, 9-20-2017]
A.
Pretreatment Facilities. Users shall provide wastewater treatment as necessary to comply with this Chapter and wastewater permits issued under Section 710.700 and shall achieve compliance with all applicable national categorical Pretreatment Standards, Local Limits and the Prohibitions set out in Section 710.050 within the time limitations specified by the Director of Public Works, the EPA or the State of Missouri, whichever is more stringent. All facilities necessary for compliance shall be provided, operated, and maintained at the User's expense. Detailed plans describing such proposed pretreatment facilities and operating procedures shall be submitted to the City for review and shall be submitted to and approved by the Department of Community Development before such facilities are constructed. Any subsequent changes in the pretreatment facilities or method of operation shall be reported to the City and, if required, to the Director of Public Works for approval prior to the User's initiation of the changes. Neither the review nor the approval of such plans and operating procedures shall relieve the User from the responsibility of modifying the facility as necessary to produce an effluent acceptable to the City under the provisions of this Chapter.
B.
Facilities For Flow Equalization. To equalize
flows and to avoid temporary overloads, the Director of Public Works
may require any person who discharges into the POTW to construct and
maintain on their property and at their expense, in accordance with
applicable local, State and Federal rules and regulations, suitable
storage tanks or equivalent flow control facilities. The control of
the volume of discharges of waste shall be by a waterworks type rate
controller or equivalent device, the setting and operations of which
shall be subject to the direction of the Director of Public Works.
A wastewater discharge permit may be issued solely for flow equalization.
C.
Facilities For Equalization Of Pollutant
Concentration. Whenever the total volume of wastes to be discharged
by any User in any one (1) day has considerable variation in pollutional
value, such User may be required to construct, at its sole expense,
holding or storage tanks in order to control the discharge of wastes
over a twenty-four-hour period. The Director of Public Works may require
such tanks to be equipped to mix the waste thoroughly so that its
quality will be uniform when discharged into the POTW.
D.
Interceptors, Separators And Traps For
Grease, Oil And Sand. Interceptors, separators and traps for grease,
oil and sand shall be constructed at User's sole expense and to City
specifications when, in the opinion of the Director of Public Works,
they are necessary for proper handling and control of grease, oil,
sand, grit, petroleum products or other substance. By way of example
but not of limitation, such devices may be required for industrial
or commercial establishments, public eating places, hotels, hospitals,
automobile service centers, vehicle wash facilities or other institutions.
Such devices shall be located so as to be readily accessible for cleaning
and inspection and shall be maintained by the User at its sole expense
in continuously efficient operation at all times.
1.
The size, type and location of interceptors,
separators and traps shall be selected in accordance with the edition
of the International Plumbing Code currently adopted by the City[1] and shall be approved in writing prior to installation
by the Department of Community Development.
2.
The Director of Public Works may
direct the User to install a unit or to correct any unit that is not
installed appropriately or functioning properly.
3.
These vessels must have each chamber
directly accessible from the surface to provide a means for servicing,
sampling and maintaining the interceptor in working and operating
condition. These chambers shall not be visually obscured with parked
vehicles, building structures, recycle containers, refuse containers,
pallets, trees, growing plants/shrubbery, landscape tarps, plastic
sheets, foreign objects, soil, mulch, floorings or pavement of any
substance.
4.
The Director of Public Works may
order the repair, modification or replacement of a unit or may order
the addition of a grease recovery device in combination with a grease
interceptor. All food service establishments and other grease-handling
facilities shall be subject to review, evaluation and inspection by
the aforementioned representatives during normal working hours.
5.
Interceptors, separators and traps
shall be serviced and emptied of accumulated waste content at a frequency
appropriate to maintain the efficiency of the device. Accumulated
solids, grease caps (floating FOG) and sludge pockets (settled solids)
must be removed at a frequency to maintain an effective volume of
the device. Servicing of interceptors, separators or traps may be
more frequent than, but not less frequent than, as required by permit
or this Chapter. For the purpose of enforcement, a grease interceptor,
oil and water separator or grease trap shall be considered to be at
its maximum level and shall be considered inoperative if fifty percent
(50%) or more of the trap is filled with floating FOG and settled
solids. It shall be immediately cleaned and cleaning frequencies shall
be increased. The owner, lease-holder or operator shall be responsible
for the proper removal and disposal of grease by appropriate means.
6.
Interceptors, separators and traps
shall be kept free of grit, rocks, gravel, sand, eating utensils,
cigarettes, shells, towels, rags, excessive food solids, etc., which
can reduce the effective volume of the unit.
7.
If any wastewater is removed from
a grease interceptor, treated and then reintroduced back into the
interceptor, the User shall remain responsible for not exceeding the
established oil and grease numerical limit and responsible for maintaining
an effective volume of the interceptor. Reintroduction of screenings,
sludges or residues is prohibited.
8.
Any User utilizing biological or
chemical additives remains responsible for not exceeding the established
oil and grease numerical limit and remains responsible for maintaining
an effective volume of the interceptor, separator or trap. Any User
utilizing biological additives or enzymes must notify the Director
of Public Works and provide the Safety Data Sheets (SDS) for such
additives. The exclusive use of biological and chemical additives
is not considered acceptable grease vessel maintenance practice. Their
use cannot be employed as the sole method of treating or maintaining
the vessel's effluent.
9.
Emulsifiers are prohibited from use
in oil and water separators. The use of emulsifiers in grease interceptors
or grease traps for the purpose of meeting the established oil and
grease numerical limit or to decrease the service frequency is prohibited.
10.
Any User utilizing an automatic grease
removal system remains responsible for not exceeding the established
oil and grease numerical limit and remains responsible for maintaining
an effective volume of the interceptor, separator or trap.
11.
Grease interceptors shall receive
grease-laden waste from the major point sources. Wastes that are not
expected to contain grease or oil and that otherwise do not require
separation shall not discharge into the interceptor. Hot water flushing
of a grease interceptor, oil and water separator or grease trap is
prohibited.
12.
Any removal and hauling of grease
or oils from in-ground units shall be performed by a licensed waste
disposal or rendering firm. Indoor, above ground, under sink grease
vessels may be cleaned by the User unless required otherwise. The
User is responsible for appropriate disposal of the removed substances.
13.
The User shall keep all records of
interceptor, separator or trap maintenance for three (3) years. The
User must keep records of each cleanout including the date of service,
name of cleanout company and receipt. The User shall provide to the
Director of Public Works documentation of maintenance as required.
The local User shall make appropriate arrangements with its corporate
office, if any, in this regard as needed.
14.
Each facility will be issued a grease
vessel maintenance log upon initial inspection. The log shall be available
at all times and kept up-to-date.
E.
Authority To Direct And Restrict Discharge.
Whenever deemed necessary, the Director of Public Works 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,
and such other conditions as may be necessary to protect the POTW
and determine the User's compliance with the requirements of this
Chapter.
[R.O. 2011 § 710.700; Ord. No. 17-184 § 1, 9-20-2017]
A.
Users who do not meet the criteria for
Significant Industrial User may be required by the Director of Public
Works to obtain a wastewater discharge permit when it is determined
by the Director of Public Works that such permit meets the intent
of this Chapter. For purpose of classification only, they shall be
called minor non-domestic contributors (MNDC). All Users with an interceptor,
separator or trap shall submit an industrial waste questionnaire or
permit application to determine the need for a local wastewater discharge
permit. A fee of one hundred fifty dollars ($150.00) per year must
accompany the permit application. Not-for-profit charitable and religious
organizations, as well as educational institutions, are exempt from
fees associated with the permit application. The Director of Public
Works may issue such local permits as necessary to carry out the purposes
of this Chapter.
B.
User permits shall comply with the requirements
of this Chapter.
C.
Permits shall be issued for a specified
time period, not to exceed five (5) years. A permit may be issued
for a period less than a year or may be stated to expire on a specific
date.
D.
Wastewater permits are issued to a specific User for a specific operation. A wastewater discharge permit shall not be reassigned or transferred or sold to a new owner, new User, different premises or a new or changed operation without the approval of the Director of Public Works as set out in Section 710.260.
E.
A permitted User shall apply for a permit
reissuance by submitting a complete permit application a minimum of
thirty (30) days prior to the expiration of the existing permit or
as specified in the discharge permit.
F.
A permitted User must keep a copy of their
wastewater permit on site at the local facility. For permitted Users
with an interceptor, separator or trap, the User's permit shall establish
a minimum frequency of service. More frequent service may be necessary
to comply with the established numerical limit.
G.
For permitted Users with an interceptor,
separator or trap, failure to service the unit in the time period
required by permit and/or failure to provide documentation required
by permit shall each constitute violation of this Chapter.
[R.O. 2011 § 710.710; Ord. No. 17-184 § 1, 9-20-2017]
A.
All permitted food service establishments
discharging wastewater to the City's POTW are subject to the following
requirements:
1.
Grease Interceptor Requirements.
All permitted food service establishments are required to install,
operate and maintain an approved type and adequately sized grease
interceptor necessary to maintain compliance with the objectives of
this Chapter. All grease interceptors must meet the requirements of
the edition of the International Plumbing Code currently adopted by
the City.[1]
2.
Implementation.
a.
All new food service establishment
facilities are subject to grease interceptor requirements. All such
facilities must obtain approval from the Department of Community Development
for grease interceptor sizing after submission of plans for a building
permit. All grease interceptors shall be readily and easily accessible
for cleaning and inspection. Existing facilities with planned modification
in plumbing improvements will be required to include plans to comply
with the grease interceptor requirements. These facilities must obtain
approval from the Department of Community Development for grease interceptor
sizing after submission of plans for a building permit.
b.
All existing food service establishments
determined by the Director of Public Works to have a reasonable potential
to adversely impact the POTW will be notified of their obligation
to install a grease interceptor within the specified period set forth
in the notification letter.
3.
Variance From Grease Interceptor
Requirements. Grease interceptors required under this Chapter shall
be installed unless the Department of Community Development authorizes
the installation of an indoor grease trap or other alternative pretreatment
technology and determines that the installation of a grease interceptor
would not be feasible. The food service establishment bears the burden
of demonstrating that the installation of a grease interceptor is
not feasible. The Department of Community Development may authorize
the installation of an indoor grease trap where the installation of
a grease interceptor is not feasible due to space constraints or other
considerations. If an establishment believes the installation of a
grease interceptor is infeasible because of documented space constraints,
the request for an alternate grease removal device shall contain the
following information:
B.
Alternative pretreatment technology, includes,
but is not limited to, devices that are used to trap, separate and
hold grease from wastewater and prevent it from being discharged into
the POTW. All alternative pretreatment technology must be appropriately
sized and approved by the Department of Community Development.
[R.O. 2011 § 710.720; Ord. No. 17-184 § 1, 9-20-2017]
B.
Grease interceptors shall be constructed
in accordance with design approved by the Department of Community
Development and shall have a minimum of two (2) compartments with
fittings designed for grease retention.
C.
Grease interceptors shall be installed
at a location where it shall be easily accessible for inspection,
cleaning and removal of intercepted grease. The grease interceptor
may not be installed in any part of the building where food is handled.
Location of the grease interceptor must meet the approval of the Department
of Community Development.
D.
All such grease interceptors shall be serviced
and emptied of accumulated waste content as required in order to maintain
minimum design capability or effective volume. These devices should
be inspected at least monthly. Users who are required to maintain
a grease interceptor shall:
E.
The User shall maintain a written record
of inspection and maintenance for three (3) years. All such records
will be made available for on-site inspection by representatives of
the City during all operating hours.
F.
Sanitary wastes are not allowed to be connected
to sewer lines intended for grease interceptor service.
G.
Except as provided herein, for a period
of one (1) year following adoption of this Chapter, although installation
of grease interceptors will be required, no enforcement actions will
be taken under this Chapter for failure to achieve limits on grease
discharges from grease interceptors. If during this one (1) year period
an obstruction of a sewer main(s) occurs that causes a sanitary sewer
overflow to the extent that an impact on the environment is realized
and that said overflow or failure of the POTW to convey sewage can
be attributed in part or in whole to an accumulation of grease in
the sewer main(s), the City will take appropriate enforcement actions,
as stipulated in the City's Pretreatment Program – Enforcement
Response Plan and this Chapter, against the generator or contributor
of such grease.
H.
Access manholes, with a minimum diameter
of twenty-four (24) inches, shall be provided over each grease interceptor
chamber and sanitary tee. 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.
[R.O. 2011 § 710.730; Ord. No. 17-184 § 1, 9-20-2017]
A.
Upon approval by the Department of Community
Development, a grease trap complying with the provisions of this Section
must be installed in the waste line leading from sinks, drains and
other fixtures or equipment in food service establishments where grease
may be introduced into the drainage or sewage system in quantities
that can effect line stoppage or hinder sewage treatment or private
sewage disposal.
C.
No grease trap shall be installed which
has a stated rate flow of more than fifty-five (55) gallons per minute,
nor less than twenty (20) gallons per minute, except when specially
approved by the Department of Community Development.
D.
Grease traps shall be maintained in efficient
operating conditions by periodic removal of the accumulated grease.
No such collected grease shall be introduced into any drainage piping
or public or private sewer.
E.
No food waste disposal unit or dishwasher
shall be connected to or discharge into any grease trap.
F.
Wastewater in excess of one hundred forty
degrees Fahrenheit (140° F.) [sixty degrees Celsius (60° C.)]
shall not be discharged into a grease trap.
G.
Except as provided herein, for a period
of one (1) year following adoption of this Chapter, although installation
of grease traps will be required to be installed, no enforcement actions
will be taken under this Chapter for failure to achieve limits on
grease discharges from the facility. If during this one (1) year period,
an obstruction of a sewer main(s) occurs that causes a sewer overflow
to the extent that an impact on the environment is realized and that
said overflow or failure of the POTW to convey sewage can be attributed
in part or in whole to an accumulation of grease in the sewer main(s),
the City will take appropriate enforcement actions, as stipulated
in the City of City's Pretreatment Program – Enforcement Response
Plan and this Chapter, against the generator or contributor of such
grease.
[R.O. 2011 § 710.740; Ord. No. 17-184 § 1, 9-20-2017]
If a failure to maintain settling
tanks, grit traps, interceptors, separators or traps results in partial
or complete blockage of the building sewer, private sewer system discharging
to the POTW or other parts of the POTW or causes interference or excessive
maintenance to the POTW or presents a possible health hazard, the
discharger shall be subject to the remedies herein including cost
recovery, enforcement and penalties.
