[R.O. 2004 § 700.020; Ord. No. 2.45 § 1, 6-11-1991]
A. Purpose. The purpose of this 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 Mount Vernon, Missouri, a municipal corporation.
C. Policy.
1.
This Article will be reasonably interpreted
by the water purveyor. It is the water purveyor'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 water purveyor 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 water purveyor and consumer are
jointly responsible for preventing contamination of the water system.
3.
If, in the judgment of the water
purveyor or his/her 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. 2004 § 700.030; Ord. No. 2.45 § 2, 6-11-1991]
The following definitions shall apply
in the interpretation and enforcement of this Article:
AIR-GAP SEPARATION
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.
AUXILIARY WATER SUPPLY
Any water source or system, other than the public water supply,
that may be available in the building or premises.
BACKFLOW
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.
CONSUMER
The owner or person in control of any premises supplied by
or in any manner connected to a public water system.
CONTAINMENT
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.
CONTAMINATION
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.
CROSS-CONNECTION
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.
HAZARD, DEGREE OF
An evaluation of the potential risk to public health and
the adverse effect of the hazard upon the potable water system.
1.
HAZARD, HEALTHAny 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.
2.
HAZARD, PLUMBINGA 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.
3.
HAZARD, POLLUTIONALAn 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.
4.
HAZARD, SYSTEMAn 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.
INDUSTRIAL PROCESS 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.
ISOLATION
Protection of a facility service line by installing a cross-connection
control device or air-gap separation on an individual fixture, appurtenance
or system.
POLLUTION
Such contamination or other alteration of the physical, chemical
or biological properties of any waters of the state, including change
in temperature, taste, color, turbidity, or odor of the waters, or
such discharge of any liquid, gaseous, solid, radioactive, or other
substance into any waters of the State as will or is reasonably certain
to create a nuisance or render such waters harmful, detrimental or
injurious to public health, safety or welfare, or to domestic, industrial,
agricultural, recreational, or other legitimate beneficial uses, or
to wild animals, birds, fish or other aquatic life.
PUBLIC POTABLE WATER SYSTEM
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.
SERVICE CONNECTION
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.
WATER PURVEYOR
The owner, operator or individual in responsible charge of
a public water system.
[R.O. 2004 § 700.040; Ord. No. 2.45 § 3, 6-11-1991]
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 water purveyor 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
water purveyor 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 water purveyor as necessary for
the protection of health and safety.
[R.O. 2004 § 700.050; Ord. No. 2.45 § 4, 6-11-1991]
A. The consumer's premises shall be open at
all reasonable times to the water purveyor or his/her 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 water purveyor or his/her
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. 2004 § 700.060; Ord. No. 2.45 § 5, 6-11-1991]
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. 2004 § 700.070; Ord. No. 2.45 § 6, 6-11-1991]
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 water purveyor 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 water purveyor 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 have an auxiliary water
supply, unless the quality of the auxiliary supply is acceptable to
the water purveyor 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 reestablished.
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 in 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 water purveyor 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 water purveyor and the Missouri Department
of Natural Resources:
1.
Aircraft and missile plants.
4.
Beverage bottling plants.
5.
Canneries, packing houses and reduction
plants.
7.
Chemical manufacturing, processing,
compounding or treatment plants.
12.
Hazardous waste storage and disposal
sites.
13.
Hospitals, medical buildings, sanitariums,
clinics, morgues, mortuaries, autopsy facilities.
14.
Industries using toxic substances.
15.
Irrigation and sprinkler systems,
separate from domestic systems, such as parks, playgrounds, cemeteries,
golf courses, schools, estates.
17.
Lawn sprinkling systems adjunct to
domestic systems.
18.
Metal manufacturing, cleaning, processing
and fabricating plants.
19.
Nursing or convalescent homes and
clinics.
20.
Oil and gas production, storage or
transmission properties.
21.
Paper and paper products plants.
24.
Printing and publishing facilities.
25.
Radioactive material processing plants
or nuclear reactors.
26.
Research and analytical laboratories.
27.
Rubber plants, natural and synthetic.
28.
Sewage and storm drainage facilities —
pumping stations.
30.
Waterfront facilities and industries.
[R.O. 2004 § 700.080; Ord. No. 2.45 § 7, 6-11-1991]
A. Any backflow prevention device required
by this Article shall be of a model or construction approved by the
water purveyor 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 water purveyor 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 water purveyor 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 water purveyor
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 water purveyor
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. 2004 § 700.090; Ord. No. 2.45 § 8, 6-11-1991]
A. Backflow prevention devices required by
this Article shall be installed at a location and in a manner approved
by the water purveyor 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. 2004 § 700.100; Ord. No. 2.45 § 9, 6-11-1991]
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-gap separations shall be inspected
at the time of installation and at least every twelve (12) months
thereafter.
2.
Double-check valve assemblies shall
be inspected and tested for tightness at the time of installation
and at least every twelve (12) months thereafter. They shall be dismantled,
inspected internally, cleaned and repaired whenever needed and at
least every thirty (30) months.
3.
Reduced pressure principle backflow
prevention devices shall be inspected and tested for tightness at
the time of installation and at least every twelve (12) months thereafter.
They shall be dismantled, inspected internally, cleaned and repaired
whenever needed and at least every five (5) years.
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 water purveyor
upon request.
E. Backflow prevention devices shall not be
bypassed, made inoperative, removed or otherwise made ineffective
without specific authorization by the water purveyor.
[R.O. 2004 § 700.110; Ord. No. 2.45 § 10, 6-11-1991]
A. The water purveyor shall deny or discontinue,
after fifteen (15) days' 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 water purveyor or if it is found that the backflow
prevention device has been removed or bypassed 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 water purveyor.