The purpose of this regulation is as follows:
A. To
protect the public potable water supply of the city of Revere from
the possibility of contamination or pollution by isolating within
the customer's internal distribution system(s) or the customer's private
water system(s) such contaminants or pollutants which could flow into
the public potable water supply; and
B. To
promote the elimination or control of existing cross connections between
the customer's in-plant potable water system(s) and nonpotable water
system(s), plumbing fixtures and industrial piping systems; and
C. To
provide for the maintenance of a continuing cross connection control
program which will systematically and effectively prevent contamination
or pollution of all potable water systems.
(C.O. 07-23 § 1 (part))
The city of Revere plumbing department (hereinafter called the
"city") shall be responsible for the protection of the public drinking
water supply from contamination or pollution due to the backflow of
contaminants or pollutants through the water service connection. If,
in the judgment of the city, an approved backflow prevention assembly
is required at the customer's private water system, for the safety
of Revere's public water supply, the city shall give notice in writing
to said customer to install an approved backflow prevention device(s)
at specific location(s) on the customer's premises. The customer shall
immediately install such approved devices, at the customer's expense.
The failure, refusal or inability on the part of the customer to install,
have tested and maintain said devices shall constitute grounds for
the disconnection of water service to the premises until such requirements
have been satisfactorily met.
(C.O. 07-23 § 1 (part))
As used in this section, unless the context indicates otherwise,
the following words shall have the following meanings:
"Air gap separation"
means the method of preventing backflow through the use of
an 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 of the receptacle.
"Atmospheric vacuum breaker"
means an approved backflow device used to prevent back siphonage
which is not designed for use under static pressure.
"Backflow preventer with intermediate atmospheric vent"
means a device having two independently operating check valves
separated by an intermediate chamber with a means for automatically
venting it to the atmosphere in which the check valves are force-loaded
to a normally closed position and the venting means is force-loaded
to a normally open position.
"Backflow"
means the flow of water or other liquids, mixtures or substances
into the distribution pipes of a potable water supply from any source
other than the intended source.
"Barometric loop"
means a loop of pipe rising at least thirty-five feet, at
its topmost point, above the highest fixture it supplies.
"Contaminant"
means any physical, chemical, biological or radiological
substance or matter in water.
"Cross connection"
means any connection between a distribution pipe of potable
water from a public water system and any waste pipe, soil pipe, sewer,
drain or other unapproved source. Without limiting the generality
of the foregoing, the term "cross connection" shall also include any
bypass arrangements, jumper connections, removal section swivel or
changeover connection and other temporary or permanent connection
through which backflow can or may occur.
"Double check valve assembly"
means a backflow prevention device which incorporates an
assembly of check valves, with shutoff values at each end and appurtenances
for testing.
"Potable water"
means water from any source which has been approved by the
department of environmental protection for human consumption.
"Pressure vacuum breaker"
means an approved backflow prevention device designed to
prevent only back siphonage and which is designed for use under static
line pressure.
"Public water supply system"
means a system for the provision to the public of piped water
for human consumption as defined in 310 CMR 22.02(8).
"Reduced pressurer backflow preventer"
means an approved backflow prevention device incorporating
(1) two or more check valves; (2) automatically operating differential
relief value located between the two checks; (3) two shutoff valves;
and (4) necessary appurtenances for testing; and which is designed
to operate so that (5) the pressure in the zone between the two check
valves is maintained at a value less than the pressure on the public
water system side of the device; and (6) at cessation of normal flow,
the pressure in the zone between the two check valves is maintained
at a value less than the pressure on the public water system side
of the device; and (7) in the case of leakage of either check valve,
the differential relief valve shall operate to maintain reduced pressure
in the zone by discharging to the atmosphere.
(C.O. 07-23 § 1 (part))
The water system shall be considered as made up of two parts:
the utility system and the customer system.
A. The
utility system shall consist of source facilities and the distribution
system, and shall include all those facilities of the water system
under the complete control of the utility, up to the point where the
customer's system begins. In this definition, the "source" shall include
all components of the facilities utilized in the production, treatment,
storage and delivery of water to the distribution system; and the
"distribution system" shall include the network of conduits used for
the delivery of water from the source to the customer's system.
B. The
customer system shall include those parts of the facilities beyond
the termination of the utility distribution system which are utilized
in conveying utility delivered domestic water to points of use.
(C.O. 07-23 § 1 (part))
The city shall maintain the following records and reports: (1)
all survey and inspection reports; (2) copies of backflow device tests
and re-tests; (3) copies of lists, summaries and annual reports submitted
to the Department of Environmental Protection; (4) design data sheets
and plumbing plans; and (5) copies of violation report forms.
The water customer shall maintain the following records and
reports: (1) copies of violation report forms; (2) copies of all backflow
device tests and re-tests; and (3) copies of design data sheets and
plumbing plans.
(C.O. 07-23 § 1 (part))