[R.O. 2012 §700.080; Ord. No. 489 §1, 4-5-1982]
A. Purpose. The purpose of these rules and regulations is:
1. To protect the public potable water supply from contamination or
pollution by isolating within the consumer's water system contaminants
or pollutants which could backflow through the service connection
into the public potable water system.
2. To promote the elimination 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 sources
or systems containing process fluids.
3. To provide for the maintenance of a continuing program of cross-connection
control which will systemically and effectively prevent the contamination
or pollution of the public and consumer's potable water system.
B. Application. These rules and regulations shall apply to
all premises served by the public potable water system of the City
of Ash Grove, Missouri.
C. Policy. The Superintendent of Water shall be responsible
for the protection of the public potable water system from contamination
due to backflow of contaminants through the water service connection.
If, in the judgment of the Superintendent of Water or his/her authorized
representative he/she finds said potable water system to be contaminated
or in danger of becoming contaminated he/she shall give notice to
the consumer to install such approved backflow prevention device at
each service connection to his/her premises, the consumer shall immediately
install such approved device or devices at his/her own expense, and
failure, refusal, or inability on the part of the consumer to install
such device or devices immediately shall constitute grounds for discontinuing
water service to the premises until such device or devices have been
installed.
[R.O. 2012 §700.090; Ord. No. 489 §2, 4-5-1982]
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 supply water to
a tank, plumbing fixture, or other device and the overflow level rim
of the receptacle.
APPROVED
A backflow prevention device or method has been accepted
by the Water Purveyor as suitable for the proposed used.
AUXILIARY WATER SYSTEM
Any water system on or available to the premises other than
the public water system and includes the water supplied by the system.
These auxiliary waters may include water from another purveyor's public
water system; or water from a source such as wells, lakes, or streams,
or process fluids; or used water. They may be polluted or contaminated
or objectionable or constitute a water source or system over which
the Water Purveyor does not have control.
BACKFLOW
The flow of water or other liquids, mixtures, or substances
into the distributing pipes of a potable water supply from any source
other than the intended source of the potable water supply.
CONSUMER
Any person who receives water from a public water system,
except those persons receiving water for resale.
CONSUMER'S WATER SYSTEM
Any water system, located on the consumer's premises, supplied
by or in any manner connected to a public water system. A household
plumbing system is considered to be a consumer's water system.
CONTAMINATION
An impairment of the quality of the water by sewage of process
fluids or waste to a degree which could create an actual hazard to
the public health through poisoning or through spread of disease by
exposure.
DEGREE OF HAZARD
A term derived from an evaluation of the potential risk to
health and the adverse effect upon the potable water system.
DIRECTOR
The Director of the Missouri Department of Natural Resources
or any other authorized enforcement agency.
DOUBLE-CHECK VALVE ASSEMBLY
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 testing the water-tightness
of each check valve.
HEALTH HAZARD
Any condition, device, or practice in a water system or its
operation that creates, or may create, a danger to the health and
well being of users. The word "severe" as used to
qualify "health hazard" means a hazard to the health
of the user that could reasonably be expected to result in significant
morbidity or death.
INTERCHANGEABLE CONNECTION
An arrangement or device that will allow alternate but not
simultaneous use of two (2) sources of water.
PERSON
Any individual, partnership, copartnership, firm, company,
public or private corporation, association, joint stock company, trust,
estate, political subdivision or any agency, board, department or
bureau of the State or Federal Government or any other legal entity,
which is recognized by law as the subject of rights and duties.
POLLUTION
The presence in water of any foreign substance that lends
to degrade its quality so as to constitute a hazard or impair the
usefulness or quality 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.
POLLUTIONAL HAZARD
A condition through which an anesthetically objectionable
or degrading material not dangerous to health may enter the public
water system or a potable consumer's water system.
POTABLE WATER
Water which is satisfactory for drinking, culinary, and domestic
purposes and meets the requirements of the Department of Health.
PROCESS FLUIDS
Any fluid or solution which may be chemically, biologically
or otherwise contaminated or polluted in a form or concentration such
as would constitute a health, pollutional, or system hazard if introduced
into the public or a potable consumer's water system. This includes,
but is not limited to:
1.
Polluted or contaminated waters;
3.
Used waters originating from the public water system which may
have deteriorated in sanitary quality;
5.
Contaminated natural waters taken from wells, lakes, streams,
or irrigation systems;
6.
Chemicals in solution or suspension;
7.
Oils, gases, acids, alkalis, and other liquid and gaseous fluids
used in industrial or other processes, or for firefighting purposes.
PUBLIC WATER SYSTEM
A system for the provision to the public of water for human
consumption through pipes or other constructed conveyances, if such
system has at least fifteen (15) service connections or regularly
serves an average of at least twenty-five (25) individuals daily at
least sixty (60) days per calendar year. Such system includes any
collection, treatment, storage or distribution facilities used in
connection with such system.
REDUCED PRESSURE PRINCIPAL BACKFLOW PREVENTION DEVICE
A device containing a minimum of two (2) independently acting
check valves together with an automatically operated pressure differential
relief valve located between the two (2) check valves. During normal
flow and at the cessation of normal flow, the pressure between these
two (2) checks shall be less than the supply pressure. In case of
leakage of either check valve, the differential relief valve, by discharging
to the atmosphere, shall operate to maintain the pressure between
the check valve at less than the supply pressure. The unit must include
tightly closing shut off valves located at each end of the device,
and each device shall be fitted with properly located test cocks.
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.
SYSTEM HAZARD
A condition posing an actual or potential threat of damage
to the physical properties of the public water system or a potable
consumer's water system.
USED WATER
Any water supplied by a Water Purveyor from a public water
system to a consumer's water system after it has passed through the
service connection and is no longer under the control of the Water
Purveyor.
[R.O. 2012 §700.100; Ord. No. 489 §3, 4-5-1982]
A. The
water system shall be considered as made up of two (2) parts:
1. The public potable water system; and
2. The consumer's water system.
B. The
public potable water system shall consist of the source facilities
and the distribution system, and shall include all those facilities
of the potable water system under the control of the Superintendent
of Water up to the point where the consumer's water system begins.
C. The
source shall include all components of the facilities utilized in
the production, treatment, storage, and delivery of water to the public
distribution system.
D. The
public distribution system shall include the network of conduits used
for delivery of water from the source to the consumer's water system.
E. The
consumer's water system shall include those parts of the facilities
beyond the service connection which are utilized in conveying water
from the public distribution system to points of use.
[R.O. 2012 §700.110; Ord. No. 489 §4, 4-5-1982]
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 Superintendent of Water.
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.
[R.O. 2012 §700.120; Ord. No. 489 §5, 4-5-1982]
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. 2012 §700.130; Ord. No. 489 §6, 4-5-1982]
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 Water Purveyor, actual or potential hazards to the public potable
water system exist.
B. An
approved backflow prevention device shall be installed on each service
line to a consumer's water system service premises where the following
conditions exist:
1. Premises having an auxiliary water supply, unless such auxiliary
supply is accepted as an additional source by the Water Purveyor.
2. Premises on which any substance is handled in such a fashion as to
create an actual or potential hazard to the public potable water system.
This shall include premises having sources or systems containing process
fluids or waters originating from the public potable water system
which are no longer under the sanitary control of the Water Purveyor.
3. Premises having internal cross-connections that, in the judgment
of the Water Purveyor, are not correctable or intricate plumbing arrangements
which make it impractical to determine whether or not cross-connection
exist.
4. Premises, where because of security requirements or other prohibitions
or restrictions, it is impossible or impractical to make a complete
cross-connection survey.
5. Premises having a repeated history of cross-connections being established
or re-established.
6. Others specified by the Water Purveyor.
C. An
approved backflow prevention device shall be installed on each service
line to a consumer's water system serving, but not necessarily limited
to, the following types of facilities unless the Water Purveyor determines
that no actual or potential hazard to the public potable water system
exists:
1. Hospitals, mortuaries, clinics, nursing homes.
3. Piers, docks, waterfront facilities.
4. Sewage treatment plants, sewage pumping station or storm water pumping
station.
5. Food or beverage processing plants.
7. Metal plating industries.
8. Petroleum processing or storage plants.
9. Radioactive material processing plants or nuclear reactors.
11. Others specified by the Water Purveyor.
D. An
approved backflow prevention device shall be installed at any point
of connection between the public potable or consumer's water system
and an auxiliary water supply, unless such auxiliary supply is accepted
as an additional source by the Water Purveyor.
[R.O. 2012 §700.140; Ord. No. 489 §7, 4-5-1982]
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 principal
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 principal
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.
B. The
type of protection required by this Article shall be an approved air-gap
separation or an approved interchangeable connection.
C. Where
an auxiliary water supply is used as a secondary source of water for
a fire protection system, the provisions of this Article for an approved
air-gap separation or an approved interchangeable connection may not
be required providing:
1. At premises where the auxiliary water supply may be contaminated
with substances that could cause a system or health hazard, the public
or consumer's potable water system shall be protected against backflow
by installation of an approved reduced pressure principle backflow
prevention device.
2. At all other premises, the public or consumer's potable water system
shall be protected against backflow by installation of either an approved
reduced pressure principle backflow prevention device or an approved
double-check valve assembly.
3. The public or consumer's potable water system shall be the primary
source of water for the fire protection system.
4. The fire protection system shall be normally filled with water from
the public or consumer's potable water system.
5. The water in the fire protection system shall be used for fire protection
only with no regular use of water from the fire protection system
downstream from the approved backflow prevention device.
6. The water in the fire prevention system shall contain no additives.
[R.O. 2012 §700.150; Ord. No. 489 §8, 4-5-1982]
A. Any
backflow prevention device required by these rules and regulations
shall be of a model or construction approved by the Water Purveyor
and shall comply with the following:
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."
3. An interchangeable connection to be approved shall be either a swing
type connector or a four-way valve of the lubricated plug type that
operates through a mechanism which unseats the plug, turns it ninety
degrees (90°) and reseats the plug. Four-way valves shall not
be used as stop valves, but must have separate stop valves on each
pipe connected to the valve. The telltale port on the four-way valve
shall have no piping connected and the threads or flange on this port
shall be destroyed so that a connection cannot be made.
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 Article providing the Water Purveyor is assured that they will
satisfactorily protect the public potable water system. Whenever the
existing device is moved from the present location or requires more
than minimum maintenance or when the Water Purveyor finds that the
maintenance of the device constitutes a hazard to health, the device
shall be replaced by a backflow prevention device meeting the requirements
of these regulations.
[R.O. 2012 §700.160; Ord. No. 489 §9, 4-5-1982]
A. Backflow
prevention devices required by these rules and regulations shall be
installed at a location and in a manner approved by the Water Purveyor
and shall be installed by and at the expense of the water consumer.
In addition, any backflow prevention device required by this Article
shall be installed at a location and in a manner approved.
B. Backflow
prevention devices installed on the service line to a 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. Pits
or vaults shall be of watertight construction, be so located and constructed
as to prevent flooding and shall be maintained free from standing
water by means of either a sump pump or a suitable drain. Such sump
pump or drain shall not connect to a sanitary sewer nor permit flooding
of the pit or vault by reverse flow from its point of discharge. An
access ladder and adequate natural or artificial lighting shall be
provided to permit maintenance inspection and testing of the backflow
prevention device.
[R.O. 2012 §700.170; Ord. No. 489 §10, 4-5-1982]
A. It
shall be the duty of the consumer at any premises on which backflow
prevention devices required by these regulations are installed to
have inspection, tests and overhaul made in accordance with the following
schedule or more often where inspections indicate a need.
1. Air-separation shall be inspected at time of installation and at
least every twelve (12) months thereafter.
2. Double-check valve assemblies shall be inspected and tested for tightness
at time installation is made 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 principal backflow prevention devices shall be inspected
and tested for tightness at 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.
4. Interchangeable connections shall be inspected at time of installation
and at least every twelve (12) months thereafter.
B. Inspections,
tests, and overhaul of backflow prevention devices shall be made at
the expense of the water consumer and shall be performed by the Water
Purveyor or a certified person to inspect, test and overhaul backflow
prevention devices.
C. Whenever
backflow prevention devices required by these regulations 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 inspections, tests, repairs and overhaul shall be submitted
to the Water Purveyor.
E. Backflow
prevention devices shall not be by-passed, made inoperative, removed
or otherwise made ineffective without specific authorization by the
Water Purveyor.
[R.O. 2012 §700.180; Ord. No. 489 §11, 4-5-1982]
A. Where
a booster pump has been installed on the service line to or within
any premises, such pump shall be equipped with a low pressure cut-off
device designed to shut-off the booster pump when the pressure in
the service line on the suction side of the pump drops to ten (10)
pounds per square inch gage or less.
B. It
shall be the duty of the water consumer to maintain the low pressure
cut-off device in proper working order and to certify to the Water
Purveyor, at least once a year, that the device is operable.
[R.O. 2012 §700.190; Ord. No. 489 §12, 4-5-1982]
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 these regulations 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 by-passed, or if an unprotected cross-connection exists
on the premises, or if a low pressure cut-off required by these regulations
is not installed and maintained in working order.
B. Water
service to such premises shall not be restored until the consumer
has corrected or eliminated such conditions or defects in conformance
with these regulations and to the satisfaction of the Water Purveyor.