[Ord. No. A-283 §1, 7-28-1997]
A. Purpose. The purpose of this Article is to:
1. Protect the public potable water supply from contamination or pollution
by containing within the customer'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. Promote the elimination, contamination, 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 system.
3. 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 of Lockwood.
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 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.
3. If, in the judgement of the water purveyor or his/her authorized
representative, cross connection is required, 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. A-283 §1, 7-28-1997]
The definitions listed herein 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.
BACKFLOW PREVENTION ASSEMBLY
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.
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 backflow
prevention assembly 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
A 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.
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 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.
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'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.
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 satisfactorily for drinking, culinary,
an 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 PURVEYOR
The owner, operator, or individual in responsible charge
of a public water system.
[Ord. No. A-283 §1, 7-28-1997]
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
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. A-283 §1, 7-28-1997]
A. The
consumer's premises shall be open at all reasonable times to the water
purveyors, 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
survey's of water 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. A-283 §1, 7-28-1997]
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 of 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. A-283 §1, 7-28-1997]
A. An
approved backflow prevention assembly shall be installed on each service
line to a consumer's water system servicing premises where, in the
judgement 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 judgement 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 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 recurring modifications 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 types of facilities listed in Section
705.190 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.
[Ord. No. A-283 §1, 7-28-1997]
A. Any backflow prevention assembly required to protect the facilities listed in Section
705.190 shall be 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, 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. A-283 §1, 7-28-1997]
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.
[Ord. No. A-283 §1, 7-28-1997]
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
inspection, 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 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 included 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.
[Ord. No. A-283 §1, 7-28-1997]
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.
[Ord. No. A-283 §1, 7-28-1997]
A. Class I Backflow 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;
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, fabrications, cleaning, or 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
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 could 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, storm water 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;
21. Irrigations systems with facilities for injection of pesticides,
herbicides or other chemicals or with provisions for creating back
pressure. The backflow assembly may be installed between the customer
service line and the irrigations system;
22. Portable tanks for transporting water taken from a public water supply
system;
23. Facilities which have pumped or repressurized cooling or heating
systems that are served by a public water system; and
24. Facilities which contain any boiler system and are served by a public
water supply. The backflow assembly may be installed on the water
service line to the boiler.
B. Class II Backflow Hazards.
1. Tanks to store water from the public water system for fire fighting
only, unless such tanks meet the requirements of the department for
construction to maintain bacteriological quality of the water;
2. Fire sprinkler systems not using chemical additives;
3. Irrigation systems without facilities for injection of pesticides,
herbicides or other chemicals and without provisions for creating
back pressure. The backflow assembly may be installed between the
customer service line and the irrigation system; and
4. Cross connections that 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 public water
system or its appurtenances.