[Ord. No. 1560 §I, 3-5-2002]
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 system, plumbing
fixtures and industrial-process systems.
3.
To provide for the maintenance of 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 Versailles, State
of Missouri.
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 of 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 assembly, 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.
[Ord. No. 1560 §II, 3-5-2002]
As used in this Article, the following terms shall have the
following meaning:
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 double-check valve or reduced pressure principle backflow
preventer having resilient-seated shutoff valves on both the upstream
and downstream end and the necessary test cocks as integral parts
of the assembly.
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 backflow
prevention assembly 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 assembly.
Hazard, pollutional. An actual or potential
threat to the physical properties of the water system or to the potability
of the public or 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.
Protection of a facility's internal plumbing system by installing
a backflow prevention assembly, air-gap separation, or other backflow
prevention device 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.
The owner, operator or individual in responsible charge of
a public water system.
[Ord. No. 1560 §III, 3-5-2002]
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.
[Ord. No. 1560 §IV, 3-5-2002]
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.
[Ord. No. 1560 §V, 3-5-2002]
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 assembly 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 assembly 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.
[Ord. No. 1560 §VI(App. B, C), 3-5-2002]
A.
An
approved backflow prevention assembly 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 assembly 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 material 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 assembly 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 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 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
types of facilities listed below fall into one (1) or more of the
categories of premises where an approved air-gap separation or reduced
pressure principle backflow prevention assembly 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.
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Types of Facilities Representing High Hazard Cross-Connections
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1.
Aircraft and missile manufacturing plants;
2.
Automotive plants including those plants which manufacture motorcycles,
automobiles, trucks, recreational vehicles and construction and agricultural
equipment;
3.
Potable water dispensing stations which are served by a public water
system;
4.
Beverage bottling plants including dairies and breweries;
5.
Canneries, packing houses and reduction plants;
6.
Car washes;
7.
Chemical, biological and radiological laboratories including those
in high schools, trade schools, colleges, universities and research
institutions;
8.
Hospital, clinics, medical buildings, autopsy facilities, morgues,
mortuaries, dental clinics, veterinary facilities and other medical
facilities;
9.
Metal or plastic manufacturing, fabrication, cleaning, plating or
processing facilities;
10.
Plants manufacturing paper and paper products;
11.
Plants manufacturing, refining, compounding or processing fertilizer,
film, herbicides, natural or synthetic rubber, pesticides, petroleum
or petroleum products, pharmaceuticals, radiological materials or
any chemical which would be a contaminant to the public water system;
12.
Commercial facilities that use herbicides, pesticides, fertilizers
or any chemical which would be a contaminant to the public water system;
13.
Plants processing, blending or refining animal, vegetable or mineral
oils;
14.
Commercial laundries and dye works;
15.
Sewage, stormwater and industrial waste treatment plants and pumping
stations;
16.
Waterfront facilities including piers, docks, marinas and shipyards;
17.
Industrial facilities which recycle water;
18.
Restricted or classified facilities or other facilities closed to
the supplier of water or the department;
19.
Fire sprinkler systems using any chemical additives;
20.
Auxiliary water systems;
21.
Irrigation systems with facilities for injection of pesticides, herbicides
or other chemicals or with provisions for creating back pressure;
22.
Portable tanks for transporting water taken from a public water system;
and
23.
Facilities which have pumped or repressurized cooling or heating
systems that are served by a public water system, including all boiler
systems.
D.
The
type of facility listed in below are premises where an approved double-check
valve assembly is required by the Water Purveyor and the Missouri
Department of Natural Resources as the minimum level of protection
for 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.
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Types of Facilities Representing Low Hazard Cross-Connections
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1.
Tanks to store water from the public water system for fire fighting
only, unless the tanks meet the requirements of the department for
construction to maintain bacteriological quality of the water;
2.
Fire sprinkler systems not using chemical additives. This only applies
to new fire sprinkler systems or fire sprinkler systems scheduled
for modifications;
3.
Irrigation systems without facilities for injection of pesticides
or other chemicals. The backflow prevention assembly may be installed
between the customer service line and the irrigation system; and
4.
Cross-connections what could permit introduction of contaminants
into the public or customer water system and create a nuisance, be
aesthetically objectionable, or cause minor damage to the water distribution
system or its appurtenances.
E.
Customer facilities not listed in Subsections (C) or (D) may be designated a backflow hazard by written notification from the Water Purveyor. The notice shall specify the nature of the customer activity that necessitates designation of the facility as a backflow hazard, the type of backflow protection required and the date by which the customer shall install or construct the required assembly.
[Ord. No. 1560 §VII, 3-5-2002]
A.
Any backflow prevention assembly required to protect the facilities listed in Section 700.180(C) 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 receiving
vessel, but in no case less than one (1) inch.
2.
A double-check valve assembly or a reduced pressure principle backflow
prevention assembly shall be approved by the Water Purveyor and shall
appear on the current "list of approved backflow prevention assemblies"
established by the Missouri Department of Natural Resources.
B.
Existing
backflow prevention assemblies 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 assembly
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
assembly meeting the requirements of this Article.
[Ord. No. 1560 §VIII, 3-5-2002]
A.
Backflow
prevention assemblies 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 assemblies 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 assemblies shall be located so as to be readily accessible
for maintenance and testing and protected from freezing. No reduced
pressure principle backflow prevention assembly shall be located where
it will be submerged or subject to flooding by any fluid.
[Ord. No. 1560 §IX, 3-5-2002]
A.
It
shall be the duty of the consumer at any premises on which backflow
prevention assemblies required by this Article are installed to have
inspections, tests and overhauls make in accordance with the following
schedule or more often where test results indicate a need. The Water
Purveyor may establish the annual test date based on the nature of
the customer's water use requirements.
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 proper
operation at the time of installation and at least every twelve (12)
months thereafter.
3.
Reduced pressure principle backflow prevention assemblies shall be
inspected and tested for proper operation at the time of installation
and at least every twelve (12) months thereafter.
B.
Inspections,
tests and overhauls of backflow prevention assemblies shall be made
at the expense of the water consumer and shall be performed by a State
of Missouri certified backflow prevention assembly tester.
C.
Whenever
backflow prevention assemblies 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
assembly from purchase to retirement. This shall include a comprehensive
listing that includes a record of all tests, inspections and repairs.
Records of inspection, tests, repairs and overhauls shall be made
available to the Water Purveyor upon request.
E.
Backflow
prevention assemblies shall not be bypassed, made inoperative, removed
or otherwise made ineffective.
[Ord. No. 1560 §X, 3-5-2002]
A.
The
Water Purveyor shall deny or discontinue, after reasonable notice
to the occupants thereof, the water service to any premises wherein
any backflow prevention assembly 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 assembly 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.
