[Ord. No. 2-2000 §I, 10-5-2000]
A. Purpose. The purpose of this Chapter is:
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 Mosby.
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 of 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 authorized representative,
cross-connection protection is requited 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 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. 2-2000 §II, 10-5-2000]
The definitions listed in Appendix A to this Chapter shall apply
in the interpretation and enforcement of this Chapter.
[Ord. No. 2-2000 §III, 10-5-2000]
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 been
constructed and installed using acceptable plumbing practices considered
by the Water Purveyor as necessary for the protection of health and
safety.
[Ord. No. 2-2000 §IV, 10-5-2000]
A. The
consumer's premises shall be open at all reasonable times to the Water
Purveyor, or his 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 authorized representative, the
consumer shall furnish information on water use practices within his
premises.
C. It
shall be the responsibility of the water consumer to conduct periodic
surveys of water use practices on his premises to determine whether
there are actual or potential cross-connections to his water system
through which contaminants or pollutants could backflow into his or
the public potable water system.
[Ord. No. 2-2000 §V, 10-5-2000]
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.
[Ord. No. 2-2000 §VI, 10-5-2000]
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 re-established.
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 backsiphonage or backpressure should occur, a serious
health hazard may result.
C. The
types of facilities listed in Appendix B to this Chapter 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. 2-2000 §VII, 10-5-2000]
A. Any
backflow prevention assembly required to protect the facilities listed
in Appendix B to 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 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.
[Ord. No. 2-2000 §VIII, 10-5-2000]
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.
[Ord. No. 2-2000 §IX, 10-5-2000]
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.
[Ord. No. 2-2000 §X, 10-5-2000]
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 defects in conformance
with this Chapter to the satisfaction of the Water Purveyor.