[R.O. 1996 § 705.130; CC 1987 §112.300]
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-connection, actual or potential,
between the public or consumer's potable water systems 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.
C. Policy. This Article will be reasonably
interpreted by the Water Superintendent. It is the intent of the Water
Superintendent 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.
1.
The Water Superintendent 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 Superintendent and consumer
are jointly responsible for preventing contamination of the water
system within the consumer's premises.
2.
If, in the judgment of the Water
Superintendent 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. 1996 § 705.140; CC 1987 §112.310]
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 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, appurtenances,
or system.
POLLUTION
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.
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 SUPERINTENDENT
The owner, operator, or individual in responsible charge
of a public water system.
[R.O. 1996 § 705.150; CC 1987 §112.320]
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 Superintendent, 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 Superintendent 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 Superintendent as necessary
for the protection of health and safety.
[R.O. 1996 § 705.160; CC 1987 §112.330]
A. The consumer's premises shall be open at
all reasonable times to the Water Superintendent, 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 Superintendent
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. 1996 § 705.170; CC 1987 §112.340]
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. 1996 § 705.180; CC 1987 §112.350]
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 Superintendent
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 Superintendent 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 Water Superintendent 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 inspections 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 the 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 back-siphonage or back-pressure
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 Superintendent 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 Superintendent and the Missouri Department
of Natural Resources:
2.
Chemically contaminated water systems.
4.
Oil and gas production, storage or
transmission properties.
[R.O. 1996 § 705.190; CC 1987 §112.360]
A. Any backflow prevention device required
by this Article shall be of a model or construction approved by the
Water Superintendent and the Missouri Department of Natural Resources.
1.
Air-gap separation 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 Superintendent, 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 Superintendent 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
Superintendent 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
Superintendent 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. 1996 § 705.200; CC 1987 §112.370]
A. Backflow prevention devices required by
this Article shall be installed at a location and in a manner approved
by the Water Superintendent 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. 1996 § 705.210; CC 1987 §112.380]
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 inspections, 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 assembly 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 the Water Superintendent or 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 Superintendent
upon request.
E. Backflow prevention devices shall not be
by-passed, made inoperative, removed or otherwise made ineffective
without specific authorization by the Water Superintendent.
[R.O. 1996 § 705.220; CC 1987 §112.390]
A. The Water Superintendent 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 Water Superintendent, 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 Water Superintendent.