The Town of Nantucket encourages all users of the sanitary sewer
system to take voluntary steps to reduce the amount of fats, oils
and grease that is poured, drained or washed down drains into the
sanitary sewer system.
In the interpretation and application of Article
IV of Chapter
336, the following words and phrases shall have the indicated meanings:
BEST MANAGEMENT PRACTICES (BMPs)
Actions or schedules of activities, prohibitions of practices,
maintenance procedures and other management practices to implement
the requirements of this regulation.
BLACK WATER
Wastewater containing human waste from sanitary fixtures
such as toilets and urinals.
FATS, OILS AND GREASE (FOG)
Organic polar compounds derived from animal and/or plant
sources that accumulate in the sewer system. These are substances
that may solidify or become viscous at temperatures above 32°
F. These substances are detectable and measurable using analytical
procedures established in 40 CFR 136.
FOOD SERVICE ESTABLISHMENT (FSE)
Any establishment, business or facility engaged in preparing,
serving or making food available for consumption. Single-family residences
are not a FSE; however, multi-residential facilities may be considered
a FSE at the discretion of the Nantucket Board of Health (BOH). FSEs
are classified as follows:
A.
CLASS 1: Deli engaged in the sale of cold-cut and microwaved
sandwiches/subs with no frying or grilling on site, ice cream shops
and beverage bars as defined by North American Industrial Classification
System (NAICS) 722515 or mobile food vendors as defined by NACIS 722330;
bed-and-breakfast establishments as defined by NACIS 72119.
B.
CLASS 2: Limited-service restaurants (a.k.a., "fast-food facilities")
as defined by NACIS 722513, except fast-food with a food line that
is heavily fried and a history of FOG discharges that interfere with
the sanitary sewer system, and catering as defined by NACIS 722320.
C.
CLASS 3: Full-service restaurants as defined by NACIS 722110.
D.
CLASS 4: Buffet and cafeteria facilities as defined by NACIS
72212.
E.
CLASS 5: Institutions (schools, hospitals, prisons, etc.) as
defined by NACIS 722310, but not to exclude self-run operations.
GRAY WATER
Refers to all other wastewater other than black water.
GREASE CONTROL EQUIPMENT (GCE)
A device for separating and retaining wastewater FOG prior
to the wastewater exiting the FSE property and entering the sanitary
sewer system. GCE includes grease traps and grease interceptors, or
other devices approved by the Nantucket BOH.
GREASE INTERCEPTOR
An interceptor whose rated flow exceeds 50 gallons per minute
(gpm) and is located outside the building.
GREASE TRAP
An interceptor whose rated flow is 50 gpm or less and is
typically located inside the building.
GREASE, BROWN
Fats, oils and grease that are discharged to the grease control
equipment.
GREASE, YELLOW
Fats, oils and grease that have not been in contact with
or contaminated from other sources such as water, wastewater or solid
waste and can be readily recycled.
INTERCEPTOR
A device designed and installed to separate and retain for
removal, by automatic or manual means, deleterious, hazardous or undesirable
matter from normal wastes, while permitting normal sewage or waste
to discharge into the drainage system by gravity flow.
INTERFERENCE
A discharge that, alone or in conjunction with a discharge
or discharges from other sources, inhibits or disrupts the sanitary
sewer collection operation, the treatment processes or operations,
or the sludge processes, use or disposal, or exceeds the design capacity
of the treatment works or collection system.
TEE (INFLUENT AND EFFLUENT)
A T-shaped pipe attached to the horizontal influent and effluent
pipes of a grease interceptor and extending downward into the trap
to depths specified by design, which on the influent side forces influent
flow into the center of the trap and prevents floating FOG from escaping
the effluent pipe.
This regulation empowers the Nantucket BOH and the Nantucket
Sewer Department to jointly develop and adopt reasonable operating
policies to facilitate the implementation of this regulation. These
policies may include, but are not limited to: FSE inspections, GCE
sizing and maintenance, FSE wastewater discharge testing and monitoring,
approval, or disapproval of GCE servicing vendors (grease waste haulers),
permitting of FSEs, and other operating policies needed to protect
the sanitary sewer system from interference from FOG.
This regulation authorizes the Sewer Commission to establish fees (in accordance with §
336-15, Other fees and charges) to offset costs associated with the implementation of this regulation. Possible fees include: inspection fees, permitting fees, surcharge fees for high-strength discharges, cleanup fees associated with FOG cleanup within the sanitary sewer system, and other fees necessary for implementation of this regulation.
The Nantucket BOH may use FSE permits as a way of implementing
this regulation and may further require the permitting or certification
of GCE service and pumping vendors.
If any section, phrase, sentence or portion of this regulation
is held invalid or unconstitutional for any reason by any court of
competent jurisdiction, such portion shall be deemed a separate, distinct
and independent provision; and such holding shall not affect the validity
of remaining portions thereof.
This regulation shall take effect from and after its passage,
the welfare of the Town requiring it.