[R.O. 2007 §37-103; Ord. No. 5130 §2, 10-5-1987]
As used in this Article, the following terms shall have these
prescribed meanings:
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 flood level rim
of the receptacle and shall be at least double the diameter of the
supply line pipe measured vertically above the flood level rim of
the vessel. In no case shall the gap be 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 or which is not
a water supply approved by the Missouri Division of Health.
Backflow caused by a pump, elevated tank, boiler or other
means that could create pressure within the system greater than the
supply pressure.
A form of backflow due to a negative or subatmospheric pressure
within a water system.
The flow, other than the intended direction of flow, of any
foreign liquids, gases or substances into the distribution system
of the public water supply.
A device to counteract back pressures or prevent back siphonage.
Any physical arrangement whereby a public water supply is
connected directly or indirectly with any other water supply system,
sewer, drain, conduit, pool, storage reservoir, plumbing fixture or
other device which contains or may contain contaminated water, sewage
or other waste or liquid of unknown or unsafe quality which may be
capable of imparting contamination to the public water supply as a
result of backflow. By-pass arrangements, jumper connections, removal
of section, swivel or changeover devices and other temporary or permanent
devices through which or because of which backflow could occur are
considered to be cross-connections.
An assembly composed of two (2) single, independently acting
check valves, including tightly closing shutoff valves located at
each end of the assembly and suitable connections for the in-line
testing of the water-tightness of each check valve.
Any system of water supply intended for human consumption
or other domestic uses, including source, treatment, storage, transmission
and distribution facilities, where water is furnished to any community,
collection or number of individuals or is made available to the public
for human consumption or domestic use, but excluding water supplied
serving one (1) single-family residence.
A device incorporating two (2) or more check valves and an
automatically operating differential relief valve located between
the two (2) checks, two (2) shutoff valves and equipped with necessary
appurtenances for in-line testing. The device shall operate to maintain
the pressure in the zone between the two (2) check valves, less than
the pressure on the public water supply side of the device. At cessation
of normal flow, the pressure between the check valves shall be less
than the supply pressure. In case of leakage of either check valve,
the differential relief valve shall operate to maintain this reduced
pressure by discharging to the atmosphere. When the inlet pressure
is two (2) pounds per square inch or less, the relief valve shall
open to the atmosphere, thereby providing an air-gap in the device.
[R.O. 2007 §37-104; Ord. No. 5130 §2, 10-5-1987; Ord. No. 5963 §1, 3-17-1997]
A.
The
purpose of this Article is to establish a cross-connection control
program to protect the health of water consumers by the control of
actual and/or potential cross-connections through the proper installation
and surveillance of backflow prevention devices on service lines leading
to premises where cross-connections exist or are likely to occur and
through the inspection and regulation of the plumbing within the premises
to minimize danger of contamination of the water system on the premises
or the public water supply itself.
B.
All
cross-connections, whether or not such cross-connections are controlled
by automatic devices, such as check valves or by hand-operated mechanisms
such as gate valves or stopcocks, are hereby prohibited.
C.
Failure
on the part of persons, firms or corporations to discontinue the use
of any and all cross-connections and to physically separate such cross-connections
will be sufficient cause for the discontinuance of the public water
service to the premises on which the cross-connection exists.
D.
Persons
bearing proper credentials and identification shall make annual inspections
of premises served by the water supply of the City to check for the
presence of cross-connections. Documentation of the annual inspection
shall be submitted to the Superintendent of Water Distribution, on
the proper form, within ten (10) business days from the date of initial
installation or annual inspection. Should such a cross-connection
be found, the City, giving the customer not less than fifteen (15)
days' notice of its intention, will discontinue service. If an immediate
hazard to health is caused by the cross-connection, water service
to the premises shall be discontinued until it is verified that the
cross-connection has been removed. The Superintendent or other duly
authorized employee of the Poplar Bluff Water and Sewer Department
may make periodic inspections of premises served by the water supply
to check for the presence of cross-connections.
[R.O. 2007 §37-105; Ord. No. 5130 §2, 10-5-1987]
A.
Backflow
prevention devices shall be installed at the service connection or
within any premises wherein the judgment of the Superintendent, 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 hazard to health should a cross-connection
occur, even though such cross-connection does not exist at the time
the backflow prevention device is required to be installed. This shall
include, but not be limited to, the following situations:
1.
Premises having an auxiliary water supply, unless the quality of
the auxiliary supply is in compliance with local standards and is
acceptable to the Superintendent;
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 that cross-connections do not exist;
4.
Premises having a repeated history of cross-connections being established
or re-established;
5.
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;
6.
Premises where materials of a toxic or hazardous nature are handled
such that, if back siphonage should occur, a serious health hazard
may result;
7.
The following types of facilities will fall into one (1) of the above
categories where a backflow prevention device is required to protect
the public water supply. A backflow prevention device shall be installed
at these facilities, unless the Superintendent determines no hazard
exists.
Auxiliary water systems;
Chemical plants using a water process;
Cooling systems;
Farming operations;
Film processing equipment;
Fire protection systems;
Food or beverage processing plants;
Hospitals, mortuaries, clinics;
Irrigation systems;
Laboratories;
Laundry and dyeing facilities;
Metal-plating industries;
Paper processing plants;
Petroleum processing or storage plants;
Radioactive material processing plants or nuclear reactors;
Sewage treatment plants;
Sprinkler systems filled with antifreeze solution;
Steam generating systems.
Storage tanks, cooling towers and circulating systems.
[R.O. 2007 §37-106; Ord. No. 5130 §2, 10-5-1987]
The type of protective device required shall be determined by
the Superintendent and shall depend on the degree of hazard which
exists.
[R.O. 2007 §37-107; Ord. No. 5130 §2, 10-5-1987]
A.
An
air-gap separation or a reduced pressure principal backflow prevention
device shall be installed where the water supply may be contaminated
with sewage, industrial waste of a toxic nature or other contaminant
which would cause a health or system hazard.
B.
In
case of a substance which may be objectionable but not hazardous to
health, a double-check valve assembly, air-gap separation or a reduced
pressure principle backflow prevention device shall be installed.
[R.O. 2007 §37-108; Ord. No. 5130 §2, 10-5-1987]
A.
Backflow
prevention devices required by this Article 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 shall be installed at the meter or at a location
designated by the Superintendent. The device shall be located so as
to be readily accessible for maintenance and testing and where no
part of the device will be submerged.
[R.O. 2007 §37-109; Ord. No. 5130 §2, 10-5-1987]
Any protective device required in this Article shall be a model
approved by the Superintendent.
[R.O. 2007 §37-110; Ord. No. 5130 §2, 10-5-1987]
Backflow prevention devices shall be inspected and tested annually
by the Superintendent or other duly authorized employees of the City
bearing proper credentials and identification or more often where
successive inspections indicate repeated failure. The devices shall
be repaired, overhauled or replaced at the customer's expense whenever
they are found to be defective.
[R.O. 2007 §37-111; Ord. No. 5130 §2, 10-5-1987]
Failure of the customer to cooperate in the installation, maintenance,
testing or inspection of backflow prevention devices required in this
Article shall be grounds for the termination of water services to
the premises.
