[R.O. 2006 §725.010; Ord. No. 1087 §I, 2-12-1990]
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 would
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 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 Willow Springs.
C.
Policy. 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.
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.
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. 2006 §725.020; Ord. No. 1087 §II, 2-12-1990]
The definitions listed below shall apply to 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 double-check valve or reduced pressure principle backflow
preventer having resilient-seated shut-off 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 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 property 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 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
of 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'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.
[R.O. 2006 §725.030; Ord. No. 1087 §III, 2-12-1990]
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. 2006 §725.040; Ord. No. 1087 §IV, 2-12-1990]
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. 2006 §725.050; Ord. No. 1087 §V, 2-12-1990]
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
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.
[R.O. 2006 §725.060; Ord. No. 1087 §VI, 2-12-1990]
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 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 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 that 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.
D.
Types of Facilities Representing Cross-Connection Hazards.
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.
Hospitals, clinics, medical buildings, autopsy facilities, morgues,
mortuaries 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.
23.
Facilities which have pumped or repressurized cooling or heating
systems that are served by a public water system, including all boiler
systems.
[R.O. 2006 §725.070; Ord. No. 1087 §VII, 2-12-1990]
A.
Any backflow prevention assembly required to protect the facilities listed in Section 705.240 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 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.
C.
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.
[R.O. 2006 §725.080; Ord. No. 1087 §VIII, 2-12-1990]
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, 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.
[R.O. 2006 §725.090; Ord. No. 1087 §IX, 2-12-1990]
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 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.
3.
Reduced pressure principle backflow prevention assemblies shall be
inspected and tested for tightness 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 required 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 inspections, 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.
[R.O. 2006 §725.100; Ord. No. 1087 §X, 2-12-1990]
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 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.
