[Adopted 10-8-2012 by Ord. No. 2012-110]
The purpose of this article is to control discharges into the
public sewage collection system and wastewater treatment facility
that interfere with the operations of the system, cause blockage and
plugging of pipelines and heat exchangers, interfere with normal operation
of pumps and their controls, and contribute waste of a strength or
form that either causes a violation of the Sherwood Utility WPDES
permit or is beyond the treatment capability of the wastewater treatment
plant.
As used in this article, the following terms shall have the
meanings indicated:
Standard operating procedure of food service facilities that
reduces or eliminates the discharge of fats and grease into the sanitary
sewer system.
Those establishments primarily engaged in activities of preparing,
serving, or otherwise making available for consumption foodstuffs
and that use one or more of the following preparation activities:
cooking by frying, baking, grilling, sauteing, rotisserie cooking,
broiling, boiling, blanching, roasting, toasting, or poaching. Also
included are infrared heating, searing, barbecuing, and any other
food preparation activity that produces a hot, nondrinkable food product
in or on a receptacle that requires washing. These facilities include
but are not limited to restaurants, bakeries, cafeterias, hotels,
motels, hospitals, nursing homes, schools, grocery stores, churches,
caterers, convenience stores, movie theaters, or any other sewer users
as determined by the Sherwood Utility who discharge applicable waste.
Material composed primarily of fats, oil, and grease (FOG)
from animal or vegetable sources. The terms "fats," "oil" and "grease"
shall be referred to as "grease" by definition. This does not include
petroleum- or mineral-based products.
A device for separating and retaining waterborne greases
and grease complexes prior to the wastewater exiting the interceptor
and entering the sanitary sewer collection system and treatment system.
These devices also serve to collect settleable solids, generated by
and from food preparation activities, prior to the water exiting the
interceptor and entering the sanitary sewer collection and treatment
system.
Any person or establishment who or which contributes, causes,
or permits the contribution of discharge of wastewater into the Sherwood
Utility wastewater collection and treatment system.
A.
Any new construction, renovation, or expansion of food service facilities
shall be required to apply for a general permit and submit to the
Sherwood Utility a FOG and food waste control plan that will effectively
control the discharge of undesirable materials into the wastewater
collection system. The plan shall be approved by the Sherwood Utility.
B.
Any existing food service facility shall also be required to apply
for a general permit and submit a FOG and food waste control plan
that will effectively control the discharge of undesirable materials
into the wastewater collection system. This plan will include, but
not be limited to, best management practices (BMPs) and grease interceptors
and shall be approved by the Sherwood Utility. Existing facilities
shall not be exempt from this requirement. No food service facility
will be grandfathered.
C.
Any new owner of an existing food service facility must submit a
general permit application and a new FOG and food waste control plan
to the Sherwood Utility.
D.
Any existing food service facility terminating operations must notify
the Sherwood Utility of the exact date and time operations will terminate.
A.
Installation requirements. All existing, proposed, or newly remodeled
food service facilities inside the Sherwood Utility sewer service
area shall be required to install, at their expense, an approved,
properly operated and maintained grease interceptor or follow an approved
BMP plan. Existing facilities shall not be exempt from this requirement.
No food service facility will be grandfathered.
B.
Sanitary sewer flows. Sanitary sewer flows from toilets, urinals,
lavatories, etc., shall not be discharged into the grease interceptor.
These flows shall be conveyed separately to the sanitary sewer service
lateral.
C.
Floor drains. Only floor drains which discharge or have the potential
to discharge grease shall be connected to a grease interceptor.
D.
Garbage disposals. It is recommended that solid food waste products
be disposed of through normal solid waste/garbage collection means
through best management practices (BMPs). If a garbage disposal is
used, it must be connected to the grease interceptor. The use of disposals
is discouraged since it decreases the operational capacity of grease
interceptors and will require an increased cleaning frequency to ensure
continuous and effective operation.
E.
Dishwashers. Commercial dishwashers must be connected to the grease
interceptor. Dishwashers discharge soap and hot water which can melt
grease and allow it to pass through an undersized grease interceptor.
Interceptors must be sized accordingly to allow enough detention time
to allow water to cool and grease to solidify and float to the top
of the interceptor.
F.
Location. Any new construction after the date of adoption of this
article shall have grease interceptors installed outside the building
upstream from the sanitary sewer service lateral connection. This
will allow easy access for inspection, cleaning, and removal of the
intercepted grease at any time. A grease interceptor may not be installed
inside any part of a building without written approval by the Sherwood
Utility. If existing facilities have approved interior interceptors,
they shall be operated by an approved BMP plan.
G.
Discharge limits. No user shall allow wastewater discharge to exceed
a daily maximum of 100 milligrams per liter of grease.
A.
Construction. Grease interceptors shall be constructed and sized
in accordance with State of Wisconsin Department of Safety and Professional
Services standards, § SPS 382.34, Wis. Adm. Code.[1]
B.
Access. Access to grease interceptors shall be available at all times
to allow for proper maintenance and inspection.
A.
Cleaning/pumping. The food service facility, at its expense, shall
maintain all grease traps and interceptors to assure proper operation
and efficiency and meet discharge limits. Maintenance of the grease
interceptor shall include the complete removal of floating and settled
solids and inspecting and/or repairing any portion of the interceptor
that is not functioning properly. Grease hauling shall be performed
by a qualified licensed hauler. Users must be able to provide with
documentation the date; condition of interceptor after pumping, including
repairs needed; name, license number and phone number of hauler; how
much was pumped; where waste was disposed; phone number of waste disposal
site; and a copy of the original manifest from the waste hauler. Documentation
must be in a readily accessible location for Sherwood Utility personnel
to inspect. Documentation must be retained for a period of no less
than three years.
B.
Cleaning/pumping frequency. Grease interceptors must be pumped out
according to the control plan. However, given that food preparation
methods vary greatly, some interceptors may need to be pumped on a
more frequent basis, and that frequency shall be documented in a BMP
plan approved by the Sherwood Utility.
C.
Submittal of records.
(1)
Each food service facility shall submit all cleaning and maintenance
records to the Sherwood Utility. The maintenance records shall include
the following information:
(a)
Facility name, address, contact person, and phone number.
(b)
Company name, address, phone number, and contact name of person
responsible for performing the maintenance, cleaning, pumping, or
repair of the grease trap.
(c)
Types of maintenance performed.
(d)
Dates maintenance was performed.
(e)
Copies of hauler manifest.
(2)
The food service facility will be required to submit maintenance
records to the Sherwood Utility. Records shall be submitted according
to the control plan.
D.
Inspections. Sherwood Utility personnel will perform periodic inspections
of food service facilities and will notify the facility of additional
required maintenance or repairs. Upon written notification by the
Sherwood Utility, the facility shall be required to perform the maintenance
and submit a remediation report to the Sherwood Utility within 21
calendar days. Upon inspection by the Sherwood Utility, the facility
may be required to install, at its expense, additional controls to
provide a complete system that prevents discharges of undesirable
materials into the wastewater collection system.
Chemical and biological treatments such as drain cleaners, enzymes,
bacteria, acid, or any other chemical or biological additives to emulsify
or remove grease are strictly prohibited.
A.
Any existing or new food service facility not submitting a FOG and food waste control plan within the time frame determined by the Sherwood Utility shall be punishable as prescribed in Chapter 40, Fees and Penalties, of this Code.
B.
Any food service facility which has not submitted maintenance records according to the control plan shall be punishable as prescribed in Chapter 40, Fees and Penalties, of this Code.
C.
Any food service facility which, after inspection by the Sherwood Utility, has not made the necessary repairs or remediation and submitted a remediation report as ordered by the Sherwood Utility within 21 calendar days shall be punishable as prescribed in Chapter 40, Fees and Penalties, of this Code.
D.
Any food service facility found using chemical and/or biological additives to emulsify or remove grease shall be punishable as prescribed in Chapter 40, Fees and Penalties, of this Code.
The Sherwood Utility may approve waiver of the permit requirement
for those food service facilities that, after inspection by Sherwood
Utility personnel, pose no threat of discharging quantities of FOG
materials into the public sewerage system that would interfere with
the efficient operation of the wastewater treatment facility.
