The following words, terms and phrases, when used in this article,
shall have the meanings ascribed to them in this section, except where
the context clearly indicates a different meaning:
(1)
"Altered"
means any material improvement, relocation of or addition to the water
supply system which does not include replacement of fixtures.
(2)
"Backflow"
means any unwanted flow of used, non-potable water or chemical substance
from any piping system into the public water supply system.
(3)
"Backpressure"
means any elevation of pressure in the downstream piping system (by
pump, elevation of piping, or steam and/or air pressure) above the
supply pressure at the point of consideration which would cause, or
tend to cause, a reversal of the normal direction of flow.
(4)
"Backsiphonage"
means a form of backflow due to a deduction in system pressure which
causes a sub atmospheric pressure to exist at a site in the water
system.
(5)
"Cross-connection"
means any unprotected water supply connection, actual or potential,
between the City of Alamo Heights water supply system and any other
source through which it is possible to introduce any used water, or
chemical substance into the public water supply system; By-pass arrangements,
jumper connections, removable sections, swivel or changeover devices,
or other devices through which backflow could occur, shall be considered
to be cross-connections.
(6)
"Health
hazard" means a potential contamination hazard involving any substance
that may cause death, illness, or spread of disease if introduced
into the public water supply.
(7)
"Non-health
hazard" means a potential contamination hazard involving any substance
that constitutes a nuisance, or may be aesthetically objectionable,
if introduced into the public water supply.
(8)
"Non-residential".
Includes all properties except one-and two-family dwellings.
(9)
"Potential
source". Includes, but is not limited to, any lavatory, sink, or vessel
which could provide the potential for backpressure and/or backsiphonage
to occur thereby contaminating the potable water supply system.
(10)
"Residential".
Includes only one-and two-family dwellings.
(11)
"Water
purveyor" means the operator, herein referred to as the City of Alamo
Heights, of the public water system which supplies potable water to
the public.
(Ordinance 1735 adopted 10/8/2007)
