[R.O. 2013 § 702.010; Ord. No.
KK611 § 1, 4-21-1997]
A.
Purpose.
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 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 Lawson.
C.
Policy.
1.
This Chapter 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 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. 2013 § 702.020; Ord. No.
KK611 § 2, 4-21-1997]
The definitions listed in Section 702.110 shall apply in the interpretation and enforcement of this Chapter.
[R.O. 2013 § 702.030; Ord. No.
KK611 § 3, 4-21-1997]
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 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 be constructed and installed using acceptable plumbing practices
considered by the water purveyor as necessary for the protection of
health and safety.
[R.O. 2013 § 702.040; Ord. No.
KK611 § 4, 4-21-1997]
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. 2013 § 702.050; Ord. No.
KK611 § 5, 4-21-1997]
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 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. 2013 § 702.060; Ord. No.
KK611 § 6, 4-21-1997]
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 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 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 back-siphonage or back-pressure should occur,
a serious health hazard may result.
C.
The types of facilities listed in Section 702.120 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.
[R.O. 2013 § 702.070; Ord. No.
KK611 § 7, 4-21-1997]
A.
Any backflow prevention assembly required to protect the facilities listed in Section 702.120 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 Chapter 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 Chapter.
[R.O. 2013 § 702.080; Ord. No.
KK611 § 8, 4-21-1997]
A.
Backflow prevention assemblies required by this Chapter 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. 2013 § 702.090; Ord. No.
KK611 § 9, 4-21-1997]
A.
It shall be the duty of the consumer at any premises on which backflow
prevention assemblies required by this Chapter 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 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 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. 2013 § 702.100; Ord. No.
KK611 § 10, 4-21-1997]
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 Chapter 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 detects in conformance
with this Chapter to the satisfaction of the water purveyor.
[R.O. 2013 § 702.110; Ord. No.
KK611 § 11(App. A), 4-21-1997]
As used in this Chapter, the following terms shall have these
prescribed meanings:
The unobstructed vertical distance through the 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, HEALTHAny 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, PLUMBINGA 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, POLLUTIONALAn actual or potential threat to the physical properties of the water system or to the portability 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, SYSTEMAn 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'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. 2013 § 702.120; Ord. No.
KK611 § 12(App. B), 4-21-1997]
A.
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; and
23.
Facilities which have pumped or repressurized cooling or heating
systems that are served by a public water system, including all boiler
systems.
