[Ord. No. 135 §A, 1-13-1992]
A. This
Article shall apply to all premises served by the public potable water
system of the City of Stockton and all auxiliary water supplies within
the City of Stockton.
B. This
Article will be reasonably interpreted by the Supervisor of Public
Works and the Board of Aldermen. The intent is 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.
C. The
cooperation of all consumers is required to implement and maintain
the program to control cross-connections. The consumer is responsible,
with the advice and input of the Supervisor of Public Works, for preventing
contamination of the water system within the consumer's premises.
D. If,
in the judgment of the Supervisor of Public Works 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. 135 §B, 1-13-1992]
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. The air-gap separation 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 in the intended direction, of any foreign
liquids, gases or substances into the distribution system of a public
water supply.
CONSUMER
The owner(s) or person(s) in control of any premises supplied
by or in any manner connected to a public water system or an auxiliary
water supply, the person(s) named on the billing information.
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 materials which could create a hazard to the public
health through poisoning, spread of disease by exposure, or otherwise.
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
The potential risk to public health and the adverse effect
of the hazard upon the potable water system.
1.
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.
2.
Plumbing. A plumbing type cross-connection
in a consumer's potable water system that has been properly protected
by a vacuum breaker, air-gap separation or backflow prevention device.
3.
Pollutional. An actual or potential threat
to the physical properties or to the potability of the water system
which would constitute a nuisance, or be aesthetically objectionable,
or could cause damage to the system or its appurtenances, but would
not necessarily be dangerous to health.
4.
System. An actual or potential threat of:
a.
Severe damage to the physical properties of the water system,
or
b.
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.
POTABLE WATER SYSTEM
Any publicly or privately owned water system which is satisfactory
for drinking, culinary and domestic purposes and is intended to meet
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.
[Ord. No. 135 §C, 1-13-1992]
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 water system may exist unless such actual or potential
cross-connections are abated or controlled to the satisfaction of
the Supervisor of Public Works 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 Supervisor of Public Works
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 Supervisor of Public Works as necessary for the protection
of health and safety.
[Ord. No. 135 §D, 1-13-1992]
A. The
consumer's premises shall be open at all reasonable times to the Supervisor
of Public Works, 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 Supervisor of Public Works 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. 135 §E, 1-13-1992]
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 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. 135 §F, 1-13-1992]
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 Supervisor of Public Works 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 Supervisor of Public
Works 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 Supervisor of Public Works
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.
8. The following types of facilities unless all hazardous or potentially
hazardous conditions have been eliminated or corrected by other methods
to the satisfaction of the Supervisor of Public Works and the Missouri
Department of Natural Resources:
a. Aircraft and missile plants.
d. Beverage bottling plants.
g. Canneries, packing houses and reduction plants.
i. Chemical manufacturing, processing, compounding or treatment plants.
j. Chemically contaminated water systems.
l. Dairies and cold storage plants.
o. Hazardous waste storage and disposal sites.
p. Hospitals, mortuaries, clinics.
q. Irrigation and sprinkler systems.
s. Metal manufacturing, cleaning, processing and fabricating plants.
t. Oil and gas production, storage or transmission properties.
u. Paper and paper products plants.
x. Printing and publishing facilities.
y. Radioactive material processing plants or nuclear reactors.
z. Research and analytical laboratories.
aa. Rubber plants — natural and synthetic.
ad. Sewage and storm drainage facilities — pumping stations.
ae. Waterfront facilities and industries.
af. Zoological and horticultural gardens.
[Ord. No. 135 §G, 1-13-1992]
A. Any
backflow prevention device required by this Article shall be of a
model or construction approved by the Supervisor of Public Works 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 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 Supervisor of Public Works
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 Supervisor of Public Works
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 Supervisor of
Public Works 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.
[Ord. No. 135 §H, 1-13-1992]
A. Backflow
prevention devices required by this Article shall be installed at
a location and in a manner approved by the Supervisor of Public Works
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 reasonable, 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. 135 §I, 1-13-1992]
A. It
shall be the duty of the consumer at any premises on which the 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 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 Supervisor
of Public Works 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 tests, repairs and overhauls shall be made available to
the Supervisor of Public Works upon request. Records of inspections
shall be made available to the Supervisor of Public Works on or before
October 1 of each year.
[Ord. No. 520, 3-27-2017]
E. Backflow
prevention devices shall not be by-passed, made inoperative, removed,
made ineffective or otherwise modified without specific authorization
by the Supervisor of Public Works.
[Ord. No. 135 §J, 1-13-1992]
A. The
Supervisor of Public Works 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
Supervisor of Public Works, 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 Supervisor of Public
Works.
C. Violations may also be prosecuted and subject to the general penalties provided for in Section
100.220 of this Code.