[Ord. No. 487 §1, 1-25-1984]
A.
Purpose. The purpose of this Chapter 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
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 Chapter shall apply to all premises served
by the public potable water system of the City of Granby.
C.
Policy.
1.
This
Chapter will be reasonably interpreted by the Water Superintendent.
It is the Water Superintendent'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 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. 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.
[Ord. No. 487 §2, 1-25-1984]
The following definitions shall apply in the interpretation
and enforcement of this Chapter:
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, gasses 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 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.
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.
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. 487 §3, 1-25-1984]
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.
[Ord. No. 487 §4, 1-25-1984]
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 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.
[Ord. No. 487 §5, 1-25-1984]
A.
The type
of protection required by this Chapter 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.
[Ord. No. 487 §6, 1-25-1984]
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 promises, 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
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 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:
1.
Aircraft
and missile plants.
2.
Automotive
plants.
3.
Auxiliary
water systems.
4.
Beverage
bottling plants.
5.
Breweries.
6.
Building
complexes.
7.
Canneries,
packing houses and reduction plants.
8.
Car
washing facilities.
9.
Chemical
manufacturing, processing, compounding or treatment plants.
10.
Chemically
contaminated water systems.
11.
Civil
works.
12.
Dairies
and cold storage plants.
13.
Film
laboratories.
14.
Fire
protection systems.
15.
Hazardous
waste storage and disposal sites.
16.
Hospitals,
mortuaries, clinics.
17.
Irrigation
and sprinkler systems.
18.
Laundries
and dye works.
19.
Metal
manufacturing, cleaning, processing and fabricating plants.
20.
Oil
and gas production, storage or transmission properties.
21.
Paper
and paper products plants
22.
Plating
plants.
23.
Power
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.
Sand
and gravel plants.
29.
Schools
and colleges
30.
Sewage
and storm drainage facilities — pumping stations.
31.
Waterfront
facilities and industries.
32.
Zoological
and horticultural gardens.
[Ord. No. 487 §7, 1-25-1984]
A.
Any backflow
prevention device required by this Chapter shall be of a model or
construction approved by the Water Superintendent 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 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 Chapter 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 Chapter.
[Ord. No. 487 §8, 1-25-1984]
A.
Backflow
prevention devices required by this Chapter 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.
[Ord. No. 487 §9, 1-25-1984]
A.
It shall
be the duty of the consumer at any premises on which backflow prevention
devices required by this Chapter 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.
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 Chapter 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.
[Ord. No. 487 §10, 1-25-1984]
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 Chapter 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 Chapter to the satisfaction of the Water Superintendent.
