Section 134-72 DEFINITIONS
As
used in this Article, the following terms shall have the
meanings indicated:
AIR-GAP
SEPARATION -
The unobstructed vertical distance through the free
atmosphere between the lowest opening from any pipe or faucet supplying
pure
water to a tank, plumbing fixture or other device and the rim of the
receptacle.
AUXILIARY
WATER SYSTEM -
Any water system on or available to the premises other
than the waterworks. These auxiliary waters may include water
from
another purveyor's waterworks 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 contaminants, pollutants, process fluids, used
water,
untreated waters, chemicals, gases or nonpotable waters into any
part of a
waterworks.
BACKFLOW
PREVENTION DEVICE -
Any approved device, method or type of construction intended
to prevent backflow into a waterworks.
CONSUMER
-
The
owner or person in control of any premises supplied by or any manner
connected to a waterworks .
CONSUMER'S
WATER SYSTEM
- Any water system located on the consumer's premises, supplied
by or in any manner connected to a waterwork.
CONTAMINATION
-
Any introduction into pure water of microorganisms, wastes,
wastewater, undesirable chemicals or gases.
CROSS-CONNECTION
-
Any connection or structural arrangement, direct or
indirect, to the waterworks where backflow can occur.
DEGREE
OF HAZARD -
A term derived from an evaluation of the potential risk to
health and the adverse effect upon the waterworks.
DOUBLE
GATE - DOUBLE CHECK VALVE ASSEMBLY -
An approved assembly composed of two (2)
single, independently acting check valves, including tightly
closing
shutoff valves located at each end of the assembly and petcocks and
test
gauges for testing the watertightness of each check valve.
HEALTH
HAZARD -
Any condition, device or practice in a waterworks or its
operation that creates or may create a danger to the health and
well-being of
the water consumer.
INTERCHANGEABLE
CONNECTION
- An arrangement or device that will allow alternate but not
simultaneous use of two (2) sources of water.
POLLUTION
- The presence of any foreign substance (chemical, physical,
radiological
or biological) in water that tends to degrade its quality so as
to
constitute an unnecessary risk or impair the usefulness of the water.
POLLUTION
HAZARD
- A condition through which an aesthetically objectionable or
degrading material may enter the waterworks or a consumer's water
system.
PROCESS
FLUIDS
- Any fluid or solution which may be chemically, biologically
or otherwise contaminated or polluted which would constitute a
health,
pollutional or system hazard if introduced into the waterworks.
This
includes, but is not limited to:
A.
Polluted or
contaminated waters.
B.
Process
waters.
C.
Used waters originated from the waterworks
which may have deteriorated in sanitary quality.
D.
Cooling Waters.
E.
Contaminated
natural waters taken from wells, lakes, streams or irrigation systems.
F.
Chemicals in
solution or suspension.
G. Oils,
gases,
acids, alkalis and other liquid and gaseous fluids used in industrial
or other
processes
or for fire-fighting purposes.
PURE
WATER or
POTABLE WATER - Water fit for human consumption and use
which is
sanitary and normally free of minerals, organic substances and toxic
agents in
excess of reasonable amounts for domestic usage in the area
served and normally
adequate in supply for the minimum health requirement of the persons
served.
REDUCED-PRESSURE-PRINCIPLE
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 valves at less than the supply pressure. The unit
must
include tightly closing shutoff valves located at each end of the
device, and
each device shall be fitted with properly located test cocks.
These
devices must be of the approved type.
SERVICE
CONNECTION
- The terminal end of a service line from the waterworks.
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 threat of damage to the
physical properties of the waterworks or a consumer's water system.
USED
WATER
- Any water supplied by a water purveyor from waterworks to a
consumer
water system after it has passed through the service connection.
WATER
PURVEYOR
- An individual, group of individuals, partnership, firm,
association, institution, corporation, municipal corporation, county or
authority
which supplies water to any person within this state from or by
means of
any waterworks.
WATERWORKS
- All structures and appliances used in connection with the collection,
storage, purification and treatment of water for drinking or
domestic use
and the distribution thereof to the public or residential
consumers as
set forth in Title 62.1, Chapter 4, Section 62.1-45a, Code of
Virginia
1950, as amended.