[R.O. 2013 § 730.010; Ord. No.
87-23 § 1, 12-14-1987; Ord. No. 06-19 § 2, 4-24-2006]
A.
Purpose. The purpose of this Chapter 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, containment, isolation
or control of existing cross-connections, actual or potential, between
the public or customer's potable water system and non-potable
water systems, plumbing fixtures and industrial-process systems.
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 Chapter shall apply to all premises served
by the public potable water system of the City.
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 customers
is required to implement and maintain the program to control cross-connections.
The Water Purveyor and customer 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 customer.
The customer shall immediately comply by providing the required protection
at his/her own expense; and failure, refusal or inability on the part
of the customer to provide such protection shall constitute grounds
for disconnecting water service to the premises until such protection
has been provided.
[R.O. 2013 § 730.020; Ord. No.
87-23 § 2, 12-14-1987; Ord. No. 06-19 § 2, 4-24-2006]
A.
AIR-GAP SEPARATION
AUXILIARY WATER SUPPLY
BACKFLOW
BACKFLOW PREVENTION DEVICE
CONTAINMENT
CONTAMINATION
CROSS-CONNECTION
CUSTOMER
HAZARD, DEGREE OF
1.
2.
3.
4.
INDUSTRIAL PROCESS SYSTEM
ISOLATION
POLLUTION
PUBLIC POTABLE WATER SYSTEM
SERVICE CONNECTION
WATER PURVEYOR
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 the 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 device, method or type of construction intended to prevent
backflow into a potable water system.
Protection of the public water supply by installing a cross-connection
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.
The owner or person in control of any premises supplied by
or in any manner connected to a public water 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 customer.
HAZARD, PLUMBINGA plumbing type cross-connection in a customer's potable water system that has not been properly protected by a vacuum breaker, air-gap separation or backflow prevention device.
HAZARD, POLLUTIONALAn actual or potential threat to the physical properties of the water system or to the potability of the public or the customer'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 customer'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
device or air-gap separation 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 § 730.030; Ord. No.
87-23 § 3, 12-14-1987; Ord. No. 06-19 § 2, 4-24-2006]
A.
No water service connection shall be installed or maintained
to any premises where actual or potential cross-connections to the
public potable or customer'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 customer'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. 2013 § 730.040; Ord. No.
87-23 § 4, 12-14-1987; Ord. No. 06-19 § 2, 4-24-2006]
A.
The customer'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 customer's premises to determine whether there are
actual or potential cross-connections to the customer'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 customer shall furnish information on water use
practices within his/her premises.
C.
It shall be the responsibility of the water customer 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 § 730.050; Ord. No.
87-23 § 5, 12-14-1987]
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.
[R.O. 2013 § 730.060; Ord. No.
87-23 § 6, 12-14-1987; Ord. No. 06-19 § 2, 4-24-2006]
A.
An approved backflow prevention device shall be installed
on each service line to a customer'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 device 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 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
mature 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 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 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:
1.
Aircraft and missile plants.
2.
Automotive plants.
3.
Auxiliary water systems.
4.
Beverage bottling plants.
5.
Canneries, packing houses, and reduction plants.
6.
Car washing facilities.
7.
Chemical manufacturing, processing, compounding
or treatment plants.
8.
Film laboratories.
9.
Fire protection systems.
10.
Hazardous waste storage and disposal sites.
11.
Hospitals, mortuaries, clinics.
12.
Irrigation and sprinkler systems.
13.
Laundries and dye works.
14.
Metal manufacturing, cleaning, processing and
fabricating plants.
15.
Oil and gas production, storage or transmission
properties.
16.
Paper and paper product plants.
17.
Plating plants.
18.
Power plants.
19.
Printing and publishing facilities.
20.
Radioactive material processing plants or nuclear
reactors.
21.
Research and analytical laboratories.
22.
Rubber plants, natural and synthetic.
23.
Sewage and storm drainage facilities - pumping
stations.
24.
Waterfront facilities and industries.
[R.O. 2013 § 730.070; Ord. No.
87-23 § 7, 12-14-1987]
A.
Any backflow prevention device required by this Chapter
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 device shall be approved by the Water
Purveyor, 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
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 device 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 device meeting the requirements
of this Chapter.
[R.O. 2013 § 730.080; Ord. No.
87-23 § 8, 12-14-1987; Ord. No. 06-19 § 2, 4-24-2006]
A.
Backflow prevention devices 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 customer.
B.
Backflow prevention devices installed on the service line
to the customer's water system shall be located on the customer'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 submerge or subject to flooding
by any fluid.
[R.O. 2013 § 730.090; Ord. No.
87-23 § 9, 12-14-1987; Ord. No. 06-19 § 2, 4-24-2006]
A.
It shall be the duty of the customer at any premises on
which backflow prevention devices required by the 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 a least every five (5) years.
B.
Inspections, tests and overhauls of backflow prevention
devices shall be made at the expense of the water customer and shall
be performed by 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 customer without delay.
D.
The water customer 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 Purveyor upon request.
E.
Backflow prevention devices shall not be bypassed, made
inoperative, removed or otherwise made ineffective without specific
authorization by the Water Purveyor.
[R.O. 2013 § 730.100; Ord. No.
87-23 § 10, 12-14-1987; Ord. No. 06-19 § 2, 4-24-2006]
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 device 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 device
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 customer has corrected or eliminated such conditions or defects
in conformance with this Chapter to the satisfaction of the Water
Purveyor.