The purpose of this Part 2 is:
A. To protect the public potable water supply of the Village of Lima,
Livingston County, New York, from the possibility of contamination
by isolating within its customers' internal distribution system(s)
or its customers' private water system(s) such contaminants or pollutants
which could backflow into the public water system; and
B. To comply with the requirements of the New York State Sanitary Code
§ 5-1.31.
The Village of Lima Water Superintendent shall be responsible
for the protection of the Village of Lima water distribution system
from contaminants that have been demonstrated to the reasonable satisfaction
of said Superintendent to enter the water distribution systems through
a customer's water service connection. If, in the judgment of said
Superintendent, an acceptable backflow prevention device is required
at the Village's water connection to any customer's premises for the
safety of the water system, the Superintendent or his designated agent
shall give notice, in writing, to said customer to install such approved
devices at his own expense; and failure, refusal or inability on the
part of the customer to install said device or devices immediately
shall constitute a grounds for discontinuing water service to the
premises upon five days' notice to the customer or customer's agent
or assigns until such device or devices have been properly installed.
As used in this Part 2, the following terms shall have the meanings
indicated:
ACCEPTABLE BACKFLOW PREVENTION DEVICE
An acceptable air gap reduced pressure zone or double-check
valve assembly as used to contain potential contamination within a
facility. In order for the reduced pressure zone device or double-check
valve assembly to be acceptable, it must be listed on the most current
version of the New York State Department of Health list of Acceptable
Devices.
AESTHETICALLY OBJECTIONABLE FACILITY
One in which substances are present which, if introduced
into the public water supply system, could be a nuisance to other
water customers, but would not adversely affect human health. Typical
examples of such substances are good-grade dyes, hot water, stagnant
water from fire lines in which no chemical additives are used, etc.
AIR GAP
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 floodwater level
rim of said vessel. An approved air gap shall be at least double the
diameter of the supply pipe, measured vertically, above the top of
the rim of the vessel; and, in no case less than one inch.
APPROVED
Accepted by the Village of Lima Superintendent as meeting
an applicable specification stated or cited in this Part 2 or as suitable
for the proposed use.
AUXILIARY WATER SUPPLY
Any water supply on or available to the premises other than
the Village of Lima approved public water supply. These auxiliary
waters may include water from any natural source(s) such as a well,
spring, stream, etc., or used water. These waters may be contaminated
or they may be objectionable and constitute an unacceptable water
source over which the water purveyor does not have sanitary control.
BACKFLOW
A flow condition, induced by differential in pressure, that
causes the flow of water or other liquids and/or gases into the distribution
pipes of the Village of Lima supply from any source other than its
intended source.
CERTIFIED TESTER
That individual or firm approved to accomplish the necessary
inspection and operational tests of backflow devices.
CONTAMINATION
The presence in water of a substance that tends to degrade
its quality.
CUSTOMER
A water user served by the supply system.
CUSTOMER'S WATER SYSTEM
The piping used to convey water supplied by the Village of
Lima supply system throughout a customer's facility. The system shall
include all those parts of the piping beyond the control point of
the Village water systems. The control point is either the curb valve
or the main valve located in the public right-of-way that isolates
the customer's facilities from the Village distribution system.
DEGREE OF HAZARD
Whether a facility is rated as hazardous, aesthetically objectionable
or nonhazardous.
DOUBLE-CHECK VALVE ASSEMBLY, ACCEPTABLE
An assembly composed of two single, independently acting
check valves, including tightly closing shutoff valves located at
each end of the assembly and suitable connections for testing the
watertightness of each check valve.
HAZARDOUS FACILITY
One in which substances may be present which, if introduced
into the public water system, would or may endanger or have an adverse
effect on the health of other water customers. Typical examples include,
but are not limited to, laboratories, sewage treatment plants, chemical
plants, hospitals and mortuaries.
NONHAZARDOUS FACILITY
One which does not require the installation of an acceptable
backflow prevention device.
PUBLIC WATER SUPPLY SYSTEM
The entire Village of Lima water system, including the treatment
works, transmission mains, distribution system and storage facilities
serving the public, as such are located within the Town and Village
of Lima. This includes the distribution system up to its connection
with the customer's water system.
REDUCED PRESSURE ZONE DEVICE, ACCEPTABLE
A device containing a minimum of two independently acting
check values, together with an automatically operated pressure differential
relief valve located between the two check valves. During normal flow
and at the cessation of normal flow, the pressure between these two
checks leakage of either check valve; the differential relief valve,
by discharging to the atmosphere, shall operate to maintain the pressure.
The unit must include tightly closing shutoff valves located at each
end to the device, and each device shall be fitted with properly located
cocks.
SUPERINTENDENT
The Superintendent of Public Works of the Village of Lima.