[Added 9-16-1978]
The Town of Stanley recognizes the responsibility
to provide its customers at the service connection with water that
is safe under all foreseeable circumstances. Thus, in the exercise
of this responsibility, the Town of Stanley must take reasonable precautions
to protect its distribution system from the hazards originating on
the premises of its customers that may degrade the water in the distribution
system.
The Town of Stanley shall not install or maintain
a water service connection to any premises where cross-connection
which could cause contamination of the water distribution system may
exist unless such cross-connection is abated or controlled to the
satisfaction of the Town. The type of protection required to protect
the water distribution system from contamination by backflow or cross-connection
will depend on the degree of hazard that exists or may exist. All
new construction must conform to the BOCA Basic Plumbing Code.
A.
General requirements. Cross-connections shall not
be permitted unless adequately protected by a backflow prevention
device. Interchangeable or changeover devices shall only be permitted
as a temporary and continuously supervised arrangement and shall not
be used where back pressure may occur, the auxiliary supply is not
an approved source or the Town's line pressure is less than 20 pounds
per square inch.
B.
Surveillance and maintenance.
(1)
Commercial and industrial services shall be inspected
by Town of Stanley personnel as required but at no greater interval
than one year. Consumers shall grant Town personnel access to perform
these inspections within five days of written notice.
(2)
Owners or occupants of dwellings wishing to have their
premises inspected must contact the Town Office. After filling out
a consent form and mailing same to the Town Office, an appointment
will be set up for inspection.
(3)
Town inspection personnel shall inspect all new connections
or reconnections to the system for potential cross-connection prior
to service.
(4)
Cross-connections found shall be promptly corrected
by the consumer. Positive action shall be taken immediately to ensure
the Town's water system is protected.
A.
General requirements. An approved backflow prevention
device shall be installed on each service line to a consumer's water
system where, in the judgment of the Town of Stanley, a health, pollutional
or system hazard to the waterworks exists and, as a minimum, but not
limited to, where the following conditions exist:
(1)
Premises having an auxiliary water system, unless
such auxiliary system is accepted as an additional source by the Town
and the source is approved by the Bureau of Water Supply Engineering,
Department of Health.
(2)
Premises on which any substance is handled in such
a manner as to create an actual or potential hazard to a waterworks.
(3)
Premises having internal cross-connection that, in
the judgment of the Town of Stanley, may not be easily correctable
or intricate plumbing arrangements which make it impracticable to
determine whether or not cross-connections exist.
(4)
Premises where, because of security requirements or
other prohibitions or restrictions, it is impossible or impractical
to make a complete cross-connection survey.
(5)
Premises having a repeated history of cross-connections
being established or reestablished.
B.
Required installations. The following uses shall be
required to install backflow prevention devices:
(1)
Hospitals, mortuaries, clinics, nursing homes, medical
buildings, sanitoriums and autopsy facilities.
(2)
Laboratories.
(3)
Waterfront facilities and industries.
(4)
Sewage and storm drain facilities.
(5)
Food and beverage processing plants.
(6)
Chemical plants, dyeing plants and laundries.
(7)
Metal plating, manufacturing, cleaning, processing
and fabricating plants.
(8)
Petroleum processing, storage and transmission facilities.
(9)
Radioactive materials processing plants or nuclear
reactors.
(10)
Car washes.
(11)
Lawn sprinkler systems and irrigation systems.
(13)
Slaughterhouses and poultry processing plants.
(14)
Farms where the water is used for other than
household uses.
(15)
Auxiliary water systems.
(16)
High-rise hotels and apartment buildings.
(17)
Cold-storage facilities.
(18)
Paper plants.
(19)
Restricted or classified facilities or facilities
closed for inspection.
C.
Approved devices. The Town of Stanley will have available
a list of approved backflow prevention devices upon request. Devices
not appearing on the list will be considered by the Town of Stanley,
provided that the device has been tested by a recognized testing laboratory
or evaluation agency is of satisfactory materials and conforms to
AWWA Standard C506.
D.
Installation of devices.
(1)
Backflow prevention devices shall be installed in
a manner to facilitate easy access for testing, maintenance, repair
and replacement.
(2)
Reduced-pressure-principle-type backflow preventors
shall not be installed in pits or areas subject to flooding or freezing.
(3)
Double-gate, double-check-valve assemblies shall not
be installed in areas subject to flooding. If installed in pits, the
pits must have gravity drains or a sump pump.
E.
Surveillance and maintenance.
(1)
As a minimum, operational tests shall be made annually
of backflow prevention devices which are required and installed. Testing
shall be performed by the user in the presence of Town personnel and
shall be in accordance with the manufacturer's instructions as approved
by the Town of Stanley.
(2)
Inspections of backflow prevention devices shall be
made by Town personnel when required, but an interval not to exceed
one year. The consumer shall grant Town personnel access to the devices
in order to perform inspections within five days of written notice.
(3)
Backflow prevention devices found to be defective
shall be promptly repaired by the consumer. Positive action shall
be taken immediately to ensure the Town's water system is protected.
(4)
Backflow prevention devices shall be overhauled at
an interval not to exceed five years.
A.
Classification. For cross-connection control, fire
protection systems may be classified on the basis of water source
and arrangement of supplies as follows:
(1)
Class 1. Direct connections from public water mains
only: no pumps, tanks or reservoirs; no physical connection from other
water supplies; no antifreeze or other additives of any kind; and
all sprinkler drains discharging to atmosphere, dry wells or other
safe outlets.
(2)
Class 2. Same as Class 1, except that booster pumps
may be installed in the connections from the street mains. (Booster
pumps do not affect the potability of the system; it is necessary,
however, to avoid drafting so much water that pressure in the water
main is reduced below 10 pounds per square inch.)
(3)
Class 3. Direct connection from public water supply
main plus one or more of the following: elevated storage tanks; and
pressure tanks. (All storage facilities are filled or connected to
public water only; the water in the tanks to be maintained in a potable
condition. Otherwise, Class 3 systems are the same as Class 1).
(4)
Class 4. Directly supplied from public mains similar
to Classes 1 and 2 and with an auxiliary water supply on or available
to the premises, or an auxiliary supply may be located within 2,000
feet of the pumper connection.
(5)
Class 5. Directly supplied from public mains and interconnected
with auxiliary supplies, such as: pumps taking suction from reservoirs
exposed to contamination, or rivers and ponds; driven wells; mills
or other industrial water systems; or where antifreeze or other additives
are used.
(6)
Class 6. Combined industrial and fire protection systems
supplied from the public water mains only, with or without gravity
storage or pump suction tanks.
B.
Protection required.
(1)
Generally, fire protection systems of Classes 1 and
2 will not require backflow protection at the service connection.
Pumper connections of automotive Fire Department equipment to street
hydrants are not ordinarily health hazards.
(2)
Class 3 systems will generally require minimum protection
(approved double-check valves) to prevent stagnant waters from backflowing
into the public potable water system.
(3)
Class 4 systems will normally require backflow protection
at the service connection. The type (air gap, reduced-pressure or
double-check valves) will generally depend on the quality of the auxiliary
supply.
(4)
Classes 4 and 5 systems normally would need maximum
protection (air gap or reduced pressure) to protect the public potable
water system.
(5)
Class 6 system protection would depend on the requirements
of both industry and fire protection and could only be determined
by a survey of the premises.
(6)
A detector check meter, Hersey or approved equal,
will be installed on the service lines, but will not be permitted
as a part of a backflow protection device. An exception may be made,
however, if the meter and the backflow prevention device are specifically
designed for that purpose.
A.
Plan review. Plans must be submitted to the Town of
Stanley in triplicate for review and approval of fire service connections,
lawn or irrigation systems or connections requiring backflow prevention
devices. An approved set will be returned to the owner and one set
will be forwarded to the Bureau of Water Supply Engineering, Department
of Health. If disapproved, the Town of Stanley will make a determination
of what will be approved and will so note and return a set to the
owner. Revised plans must be submitted for approval.
C.
Enforcement. Water service will be denied or discontinued
to a consumer if the required backflow prevention device is not installed
or it is found that the device has been removed or bypassed, if a
cross-connection not adequately protected exists on the premise or
if the pressure in the Town's lines is reduced below 10 pounds per
square inch. Water service to the consumer shall not be restored until
all deficiencies have been corrected or eliminated in accordance with
these regulations.
