A separate stainless steel sink must be provided in establishments where food preparation occurs
under running water, etc.). The sink must have at least one compartment and either an integral
stainless steel drain-board or be part of an integral stainless steel worktable. This sink is to be
situated in a manner protected from potential sources of cross-contamination. For example, the
food preparation sink must not be located next to the janitorial sink unless separated by an
approved waterproof partition. Other requirements include:
(i.e., floor sink or funnel drain).
When a food preparation sink is installed adjacent to a wall, a stainless steel, FRP, or
is to be installed.
Additional food preparation sinks may be required depending on the type of operation. For
meat items; a separate food preparation sink just for raw seafood is required in a sushi bar.
Separate areas within a large facility are required to have their own food preparation
preparation sink if these items are handled at a facility.
Food preparation sinks are not to be used for hand washing, utensil washing, the disposal
18”x18” in length and width.
Utensil Washing Sink
The proper washing of utensils consists of a three-step process. After scraping off food debris, the
sanitized by soaking in warm sanitizer solution. After the sanitizing step, the utensils are then air-
dried. Where any utensils are used (e.g., customer multi-use, kitchen, serving, beverage machine
heads or taps, etc.) a stainless steel 3-compartment sink with dual integral drain-boards is
required. Each sink compartment accommodates one of the washing steps described above. Even
facilities that only make coffee (coffee pot) or sell unpackaged jerky (serving tongs) or make ice
(scoop) have utensils that need to be regularly washed in a sanitary manner. In these
ENVIRONMENTAL HEALTH DIVISION
2120 Diamond Blvd., Suite 200
Concord, CA 94520
Phone: (925) 692-2500
Fax: (925) 692-2505
establishments, a 3-compartment sink is also required. Please note that plastic NSF-listed utensil
sinks are not allowed. Other requirements include:
For most establishments, the minimum size of each compartment is to be at least 17-
inches x 17-inches x 12-inches deep; however, the sink and drain-boards must be sized to
accommodate the largest utensil at the facility.
The minimum size of a compartment in a bar sink is 10-inches x 14-inches x 10-inches
cleaning of this equipment must be provided for EHD review and approval.
Utensil sinks must drain to the sanitary sewer via an indirect waste receptacle (i.e., floor
backsplash, extending up the wall at least 8-feet from the top of the cove base, is required
Each compartment is to be provided with hot and cold water via a premixing faucet. The
Each drain-board is to be at least as big as the largest sink compartment.
Separate areas within a large facility may be required to have their own 3-compartment
of mop water or other wastes, or any other unapproved purpose.
Hand Washing Sink
Proper hand washing is a critical component of safe food handling. Improper hand washing is one
washing by being readily accessible and conveniently located. The ability of customers to witness
hand washing (e.g., in front areas) can promote a positive sanitation image for a facility. Other
prepared, and in each utensil washing area. They must be sufficient in number and
conveniently located so as to readily facilitate hand washing. Depending on the size and
layout, some rooms or areas may need multiple hand washing sinks to realistically
encourage good hand washing habits. As a general rule hand washing sinks should be no
more than 15-20 feet travel distance from a workstation in the same room or area.
Soap and sanitary towels must be provided in permanently installed, enclosed, single-
(e.g., deli, meat department, bakery, etc.) and each satellite area of a restaurant (e.g.,
sushi bar, oyster bar, bar, serving line, wait station, utensil washing, etc.).
tile backsplash extending above the hand washing sink at least 3 feet, is to be provided if
not an integral part of the sink.
separated by an approved partition at least 6-inches in height.
Hand washing sinks are not to be used for utensil washing, food preparation, the disposal
The following are general requirements for dish machines:
temperature and water pressures of the wash, rinse, and sanitizing cycles if these have
operating ranges specified by the manufacturer or listing agency.
Dish machines with an “internal or built-in air-gap” may be directly connected to the sewer
approved indirect waste receptacle (i.e., floor sink or funnel drain).
Machines that are designed for a chemical sanitizer (e.g., chlorine rinse) must be capable
manufacturer. Dish machines using chlorine sanitizer must be able to maintain a level of
free chlorine of at least 50 ppm in the sanitizer solution or the level specified by the
manufacturer, whichever level is greater.
Machines are to have two integral stainless steel drain-boards or dish tables, one for clean
receptor. For under-counter dish machines, there must be two comparable stainless steel
drain boards adjacent to the machines (the drain-boards of an adjacent utensil sink may be
Under-counter dish machines must be placed on 6-inch legs. Casters with flexible plumbing
one person. Plastic skids are not an acceptable substitute for legs or casters.
Drain-boards must be large enough to adequately store all utensils above the floor at all
machine area for this purpose. Drain boards must be of adequate size, design, and location
so that clean and soiled utensils are kept segregated. Typically each drain board should be
large enough to accommodate two 20-inch dish racks.
board and the drain board is large enough to accommodate the disposal cone in addition to
the minimum drain-board size. Garbage disposals may not be installed under a required
A 3-compartment sink with its own dual integral drain boards is also required in addition to
Shared drain-boards may be considered on a case-by-case basis if additional space, such
as stainless steel dish racks, dish tables, or slant shelves, is provided immediately adjacent
to the dishwashing area.
Water supply and waste lines must be adequately sized and consistent with manufacturer’s
utensil sink as the pre-rinse sink.
Dish machines must operate within the parameters specified by the manufacturer or listing
parameters must be permanently affixed to the unit by the manufacturer.
High-temperature Dishwashing Machines
Dish machines that are designed for a hot water sanitizing rinse must be provided with a booster
ventilation and make-up air. Except for conveyor-type dish machines provided with approved
eyebrow hoods, hoods over these units must extend at least 12-inches beyond the edge of the
machine so that opening the doors will not release steam or vapors into the facility.
INDIRECT WASTE DRAINAGE
To prevent sewage contamination, condensate and liquid waste from food preparation equipment
beverage machines, refrigeration condensers, and similar equipment must be drained by readily
accessible indirect drainage into a floor sink or funnel drain. Other requirements include:
Unless otherwise required by the local building department, floor sinks must be installed
flush with the floor surface. If raised above the floor, a smooth, easily cleanable, continuous
coved base must be provided around the floor sink, extending integrally from the floor up to
the lip of the sink with a minimum 3/8-inch radius at the floor sink/floor juncture. Seamless
poured epoxy floor material (not paint) may be used for this purpose.
Runs of piping outside of walls, floor, and ceilings must comply with the section addressing
inspection and cleaning. When located under equipment, they must be located under the
front edge or accessible side edge of the equipment (e.g., half-exposed). The minimum
distance between the floor sink and overlying equipment is to be at least 6-inches. Readily
accessible means direct access without the need to move equipment or remove a panel,
door, or similar obstruction.
Overflow from indirect waste receptacles must be prevented from flowing into inaccessible
accessible side edge, and separated (walled off) from the rest of the counter/cabinet, and
the toe kick surrounding the waste receptacle is integrally coved in an approved manner.
receptacle (air gap).
Contact the local building department regarding the location of indirect waste receptacles in
A cold running water dipper well must be provided if scoops or other utensils are used for serving
be intermittently stored in water or at room temperature without cleaning and sanitizing between
each use. Dipper wells must be installed near where the utensil will be used. Dipper wells must
drain to the sanitary sewer via a readily accessible indirect waste receptacle (i.e., floor sink or
funnel drain). The dipper well faucet must terminate at least one inch above the rim of the dipper
General requirements for waste disposal include:
An area must be provided for storage of all anticipated wastes (e.g., garbage, rubbish,
preparation areas (e.g., smooth, durable and easily cleanable).
Outside trash storage areas are to be located as far as possible from delivery and
provided for garbage disposal.
Interior Refuse Disposal Rooms
Requirements for interior refuse disposal areas include:
Floors are to be smooth, durable, grease-resistant, nonabsorbent, coved, easily cleanable,
and capable of withstanding impacts.
This area is to be well ventilated.
combination faucet protected against backflow.
A drain to the sanitary sewer must be provided.
Floor and other surfaces within an exterior refuse disposal area must be durable and easily
facility for the first time, a hot and cold water supply and drain to the sanitary sewer is required
unless prohibited by the local sewer authority. Covered trash enclosures may also be required by
the local sewer authority.
Note: No waste of any kind may discharge to the ground surface or storm water drainage system.
A suitable facility for washing garbage cans or other refuse containers is required if these types of
All liquid waste must be discharged to a public sewer system or an approved septic system. Liquid
allowed. An approved, adequate, protected, pressurized, potable supply of hot and cold water is to
be provided at all times.
Contact the local building department or sewer agency for requirements as to the sizing,
interceptors must be readily accessible for inspection and cleaning. When installed inside the
building, the top of the grease trap must be flush with the surrounding floor and not pose a tripping
Note: If at all possible, it is recommended grease traps or interceptors are located somewhere