[R.O. 2012 §705.140; Ord. No. 531 §I, 7-6-1993]
A.
Purpose. The purpose of the Article is:
1.
To protect the public potable water supply from contamination or
pollution by containing within the consumer's internal distribution
system or private water system contaminants or pollutants which could
backflow through the service connection into the public potable water
supply system.
2.
To promote the elimination, containment, isolation, or control of
existing cross-connections, actual or potential, between the public
or consumer's potable water system and non-potable water systems,
plumbing fixtures, and industrial-process systems.
3.
To provide for the maintenance of a continuing program of cross-connection
control which will systematically and effectively prevent the contamination
or pollution of all potable water systems.
B.
Application. This Article shall apply to all premises served
by the public potable water system of the City of Knob Noster, Missouri.
C.
Policy.
1.
This Article will be reasonably interpreted by the City. It is the
City's intent to recognize the varying degrees of hazard and to apply
the principle that the degree of protection shall be commensurate
with the degree of hazard.
2.
The City shall be primarily responsible for protection of the public
potable water distribution system from contamination or pollution
due to backflow or contaminants or pollutants through the water service
connection. The cooperation of all consumers is required to implement
and maintain the program to control cross-connections. The City and
consumer are jointly responsible for preventing contamination of the
water system.
3.
If, in the judgment of the City or its authorized representative,
cross-connection protection is required through either piping modification
or installation of an approved backflow prevention device, due notice
shall be given to the consumer. The consumer shall immediately comply
by providing the required protection at his/her own expense; and failure,
refusal, or inability on the part of the consumer to provide such
protection shall constitute grounds for discontinuing water service
to the premises until such protection has been provided.
[R.O. 2012 §705.150; Ord. No. 531 §II, 7-6-1993]
The following definitions shall apply in the interpretation
and enforcement of this Article:
The unobstructed vertical distance through the free atmosphere
between the lowest opening from any pipe or faucet supplying water
to a tank, plumbing fixture, or other device and the overflow level
rim of the receptacle, and shall be at least double the diameter of
the supply pipe measured vertically above the flood level rim of the
vessel, but in no case less than one (1) inch.
Any water source or system, other than the public water supply,
that may be available in the building or premises.
The flow other than the intended direction of flow, of any
foreign liquids, gases, or substances into the distribution system
of a public water supply.
Any device, method, or type of construction intended to prevent
backflow into a potable water system.
The City of Knob Noster, or its authorized representative
in charge of the public water system.
The owner or person in control of any premises supplied by
or in any manner connected to a public water system.
Protection of the public water supply by installing a cross-connection
control device or air-gap separation on the main service line to a
facility.
An impairment of the quality of the water by sewage, process
fluids, or other wastes to a degree which could create an actual hazard
to the public health through poisoning or through spread of disease
by exposure.
Any physical link between a potable water supply and any
other substance, fluid, or source, which makes possible contamination
of the potable water supply due to the reversal of flow of the water
in the piping or distribution system.
An evaluation of the potential risk to public health and
the adverse effect of the hazard upon the potable water system.
Hazard, health: Any condition, device, or practice
in the water supply system and its operation which could create or
may create a danger to the health and well-being of the water consumer.
Hazard, plumbing: A plumbing type cross-connection
in a consumer's potable water system that has not been properly protected
by a vacuum breaker, air-gap separation or backflow prevention device.
Hazard, pollutional: An actual or potential
threat to the physical properties of the water system or to the potability
of the public or the consumer's potable water system but which would
constitute a nuisance or be aesthetically objectionable or could cause
damage to the system or its appurtenances, but would not be dangerous
to health.
Hazard, system: An actual or potential threat
of severe damage to the physical properties of the public potable
water system or the consumer's potable water system, or of a pollution
or contamination which would have a protracted effect on the quality
of the potable water in the system.
Any system containing a fluid or solution, which may be chemically,
biologically, or otherwise contaminated or polluted in a form or concentration
such as would constitute a health, system, pollutional, or plumbing
hazard if introduced into a potable water supply.
Protection of a facility service line by installing a cross-connection
control device or air-gap separation on an individual fixture, appurtenance,
or system.
The presence of any foreign substance (organic, inorganic,
or biological) in water which tends to degrade its quality so as to
constitute a hazard or impair the usefulness of the water to a degree
which does not create an actual hazard to the public health but which
does adversely and unreasonably affect such waters for domestic use.
Any publicly or privately owned water system supplying water
to the general public which is satisfactory for drinking, culinary,
and domestic purposes and meets the requirements of the Missouri Department
of Natural Resources.
The terminal end of a service line from the public water
system. If a meter is installed at the end of the service, then the "service connection" means the downstream end of the meter.
[R.O. 2012 §705.160; Ord. No. 531 §III, 7-6-1993]
A.
No
water service connection shall be installed or maintained to any premises
where actual or potential cross-connections to the public potable
or consumer's water system may exist unless such actual or potential
cross-connections are abated or controlled to the satisfaction of
the City, and as required by the laws and regulations of the Missouri
Department of Natural Resources.
B.
No
connection shall be installed or maintained whereby an auxiliary water
supply may enter a public potable or consumer's water system unless
such auxiliary water supply and the method of connection and use of
such supply shall have been approved by the City and the Missouri
Department of Natural Resources.
C.
No
water service connection shall be installed or maintained to any premises
in which the plumbing system, facilities, and fixtures have not been
constructed and installed using acceptable plumbing practices considered
by the City as necessary for the protection of health and safety.
[R.O. 2012 §705.170; Ord. No. 531 §IV, 7-6-1993]
A.
The
consumer's premises shall be open at all reasonable times to the City,
or the authorized representative, for the conduction of surveys and
investigations of water use practices within the consumer's premises
to determine whether there are actual or potential cross-connections
to the consumer's water system through which contaminants or pollutants
could backflow into the public potable water system.
B.
On
request by the City or the authorized representative, the consumer
shall furnish information on water use practices within his/her premises.
C.
It
shall be the responsibility of the water consumer to conduct periodic
surveys of water use practices on his/her premises to determine whether
there are actual or potential cross-connections to his/her water system
through which contaminants or pollutants could backflow into his/her
or the public potable water system.
[R.O. 2012 §705.180; Ord. No. 531 §V, 7-6-1993]
A.
The
type of protection required by this Article shall depend on the degree
of hazard which exists, as follows:
1.
An approved air-gap separation shall be installed where the public
potable water system may be contaminated with substances that could
cause a severe health hazard.
2.
An approved air-gap separation or an approved reduced pressure principle
backflow prevention device shall be installed where the public potable
water system may be contaminated with a substance that could cause
a system or health hazard.
3.
An approved air-gap separation or an approved reduced pressure principle
backflow prevention device or an approved double-check valve assembly
shall be installed where the public potable water system may be polluted
with substances that could cause a pollutional hazard not dangerous
to health.
[R.O. 2012 §705.190; Ord. No. 531 §VI, 7-6-1993]
A.
An
approved backflow prevention device shall be installed on each service
line to a consumer's water system serving premises where, in the judgment
of the City or the Missouri Department of Natural Resources, actual
or potential hazards to the public potable water system exist. The
type and degree of protection required shall be commensurate with
the degree of hazard.
B.
An
approved air-gap separation or reduced pressure principle backflow
prevention device shall be installed at the service connection or
within any premises where, in the judgment of the City or the Missouri
Department of Natural Resources, the nature and extent of activities
on the premises, or the materials used in connection with the activities,
or materials stored on the premises, would present an immediate and
dangerous hazard to health should a cross-connection occur, even though
such cross-connection may not exist at the time the backflow prevention
device is required to be installed. This includes but is not limited
to the following situations:
1.
Premises having an auxiliary water supply, unless the quality of
the auxiliary supply is acceptable to the City and the Missouri Department
of Natural Resources.
2.
Premises having internal cross-connections that are not correctable,
or intricate plumbing arrangements which make it impractical to ascertain
whether or not cross-connections exist.
3.
Premises where entry is restricted so that inspection for cross-connections
cannot be made with sufficient frequency or at sufficiently short
notice to assure the cross-connections do not exist.
4.
Premises having a repeated history of cross-connections being established
or re-established.
5.
Premises, which due to the nature of the enterprise therein, are
subject to recurring modification or expansion.
6.
Premises on which any substance is handled under pressure so as to
permit entry into the public water supply, or where a cross-connection
could reasonably be expected to occur. This shall include the handling
of process waters and cooling waters.
7.
Premises where materials of a toxic or hazardous nature are handled
such that if backsiphonage or backpressure should occur, a serious
health hazard may result.
C.
The
following types of facilities fall into one (1) or more of the categories
of premises where an approved air-gap separation or reduced pressure
principle backflow prevention device is required by the City and the
Missouri Department of Natural Resources to protect the public water
supply and must be installed at these facilities unless all hazardous
or potentially hazardous conditions have been eliminated or corrected
by other methods to the satisfaction of the City and the Missouri
Department of Natural Resources:
1.
Aircraft and missile plants.
2.
Automotive plants.
3.
Auxiliary water systems.
4.
Beverage bottling plants.
5.
Canneries, packing houses, and reduction plants.
6.
Car washing facilities.
7.
Chemical manufacturing, processing, compounding or treatment plants.
8.
Film laboratories.
9.
Fire protection systems.
10.
Hazardous waste storage and disposal sites.
11.
Hospitals, mortuaries, clinics.
12.
Irrigation and sprinkler systems.
13.
Laundries and dye works.
14.
Metal manufacturing, cleaning, processing and fabricating plants.
15.
Oil and gas production, storage or transmission properties.
16.
Paper and paper products plants.
17.
Plating plants.
18.
Power plants.
19.
Printing and publishing facilities.
20.
Radioactive material processing plants or nuclear reactors.
21.
Research and analytical laboratories.
22.
Rubber plants, natural and synthetic.
23.
Sewage and storm drainage facilities—pumping stations.
24.
Water front facilities and industries.
25.
Potable water dispensing stations.
26.
Other facilities as identified in State Regulations Title 10, Division
60, Chapter 11.
[R.O. 2012 §705.200; Ord. No. 531 §VII, 7-6-1993]
A.
Any
backflow prevention device required by this Article shall be of a
model or construction approved by the City and the Missouri Department
of Natural Resources.
1.
Air-gap separation to be approved shall be at least twice the diameter
of the supply pipe, measured vertically above the top rim of the vessel,
but in no case less than one (1) inch.
2.
A double-check valve assembly or a reduced pressure principle backflow
prevention device shall be approved by the City and shall appear on
the current "list of approved backflow prevention devices" established
by the Missouri Department of Natural Resources.
B.
Existing
backflow prevention devices approved by the City at the time of installation
and properly maintained shall, except for inspection and maintenance
requirements, be excluded from the requirements of this Article so
long as the City is assured that they will satisfactorily protect
the water system. Whenever the existing device is moved from its present
location, or requires more than minimum maintenance, or when the City
finds that the maintenance constitutes a hazard to health, the unit
shall be replaced by a backflow prevention device meeting the requirements
of this Article.
[R.O. 2012 §705.210; Ord. No. 531 §VIII, 7-6-1993]
A.
Backflow
prevention devices required by this Article shall be installed at
a location and in a manner approved by the City and shall be installed
at the expense of the water consumer.
B.
Backflow
prevention devices installed on the service line to the consumer's
water system shall be located on the consumer's side of the water
meter, as close to the meter as is reasonably practical, and prior
to any other connection.
C.
Backflow
prevention devices shall be located so as to be readily accessible
for maintenance and testing, protected from freezing, and where no
part of the device will be submerged or subject to flooding by any
fluid.
[R.O. 2012 §705.220; Ord. No. 531 §IX, 7-6-1993]
A.
It
shall be the duty of the consumer at any premises on which backflow
prevention devices required by this Article are installed to have
inspection, tests, and overhauls made in accordance with the following
schedule or more often where inspections indicate a need.
1.
Air-gaps shall be inspected at time of installation and each year
thereafter on a date which is no later than thirty (30) days past
the anniversary of the original inspection test date.
2.
Reduced pressure principle backflow prevention assemblies shall be
inspected and tested at the time of installation and each year thereafter
on a date which is no later than thirty (30) days past the anniversary
of the original inspection test date.
3.
Double-check valve assemblies shall be inspected and tested at the
time of installation and each year thereafter on a date which is no
later than thirty (30) days past the anniversary of the original inspection
test date.
B.
Inspections,
tests, and overhauls of backflow prevention devices shall be made
at the expense of the water consumer and shall be performed by a State
of Missouri certified backflow prevention device tester.
C.
Whenever
backflow prevention devices required by this Article are found to
be defective, they shall be repaired or replaced at the expense of
the consumer without delay.
D.
The
water consumer must maintain a complete record of each backflow prevention
device from purchase to retirement. This shall include a comprehensive
listing that includes a record of all tests, inspections, and repairs.
Records of inspections, tests, repairs, and overhauls shall be made
available to the City upon request.
E.
Backflow
prevention devices shall not be by-passed, made inoperative, removed,
or otherwise made ineffective without specific authorization by the
City.
[R.O. 2012 §705.230; Ord. No. 531 §X, 7-6-1993]
A.
The
City shall deny or discontinue, after reasonable notice to the occupants
thereof, the water service to any premises wherein any backflow prevention
device required by this Article is not installed, tested, and maintained
in a manner acceptable to the City, or if it is found that the backflow
prevention device has been removed or by-passed, or if an unprotected
cross-connection exists on the premises.
B.
Water
service to such premises shall not be restored until the consumer
has corrected or eliminated such conditions or defects in conformance
with this Article to the satisfaction of the City.
[R.O. 2012 §705.240; Ord. No. 531 §XI, 7-6-1993]
