This article sets forth the requirements for the Menominee Indian
Tribe's potable water within water supply systems when and where
there is the possibility of contamination due to cross-connections
or backflow conditions. This shall be called a "cross-connection program."
The following definitions are applicable to this article:
AIR GAP
A physical separation sufficient to prevent backflow between
the free-flowing discharge end of the potable water system and any
other system. Physically defined as a distance equal to twice the
diameter of the supply side pipe diameter but never less than one
inch.
ATMOSPHERIC VACUUM BREAKER
A device that prevents backsiphonage by creating an atmospheric
vent when there is either a negative pressure or subatmospheric pressure
in a water system.
BACKFLOW
The flow of water or other liquids, mixtures or substances,
under positive or reduced pressure in the distribution pipes of a
potable water supply from any source other than its intended source.
BACKFLOW PREVENTER or BACKFLOW PREVENTION DEVICE
A device or means designed to prevent backflow or backsiphonage.
Most commonly categorized as air gap, reduced pressure principle device,
double-check valve assembly, pressure vacuum breaker, atmospheric
vacuum breaker, hose bib vacuum breaker, residential dual check, double
check with intermediate atmospheric vent, and barometric loop.
BACKPRESSURE
A condition in which a facility's system pressure is
greater than the supplier's system pressure.
BACKSIPHONAGE
The flow of water or other liquids, mixtures or substances
into the distribution pipes of a potable water supply system from
any source other than its intended source caused by the sudden reduction
of pressure in the potable water supply system.
BAROMETRIC LOOP
A fabricated piping arrangement rising at least 35 feet at
its topmost point above the highest fixture it supplies to prevent
backsiphonage.
COMMERCIAL
A business entity that manufactures, sells or conveys an
idea, service or product.
CONTAMINANT
A substance that will impair the potable water supply by
the introduction of any foreign substance that degrades the quality
and creates a serious health hazard.
CROSS-CONNECTION
Connection or potential connection between any part of a
water supply system and another environment containing substances
in a manner that, under any circumstances, would allow the substances
to enter the water supply system by means of backsiphonage or back
pressure.
DEGREE OF HAZARD
The potential risk to public health posed by cross-connections.
Normally, the risk to the water system is divided into one of two
categories: high health hazard and low health hazard.
DEPARTMENT
The Menominee Department of Tribal Utilities located at N700
Go Around Road, Keshena, WI 54135.
DIRECTOR OF A TRIBAL FACILITY
That person who is designated by the Tribe to perform, deliver,
or fulfill the services, goods, or contractual requirements described
in that business' annual tribal budget proposal.
DOUBLE-CHECK VALVE ASSEMBLY
An assembly of two independently operating spring-loaded
check valves with tightly closing shutoff valves on each side of the
check valves, plus properly located test cocks for the testing of
each check valve.
HIGH HAZARD SITUATION
A current or potential risk of a cross-connection or backflow
situation that could cause serious sickness or death to users of the
water from the system. A high hazard cross-connection situation shall
be considered to exist at:
A.
A water supply hose bib, faucet, wall hydrant, sill cock or
other outlet which terminates with hose threads allowing a hose to
be attached.
B.
A water supply faucet, wall hydrant, or other outlet which terminates
with a serrated nipple allowing a hose to be attached.
C.
A water supply faucet, hydrant, or outlet serving a sink used
for building maintenance in a public building.
D.
A chemical pot-feeder or automatic chemical feeder installed
to serve a boiler, cooling tower or chilled water system.
E.
In the water supply piping connecting to the outlet of a fire
hydrant for any purpose other than fire suppression.
HOSE BIB VACUUM BREAKER
A device that is permanently attached to a hose bib and which
acts as an atmospheric vacuum breaker.
LOW HAZARD SITUATION
A current or potential risk of a cross-connection or backflow
situation that would not cause serious sickness or death to users
of the water from the system. This risk is usually associated with
the aesthetic quality of the water.
METER or WATER METER
A device used to measure the amount of water used by a customer
of the community water system.
OWNER
Any person who has legal title to, or license to operate,
a business upon which a cross-connection inspection is to be made
or upon which a cross-connection is present.
PRESSURE VACUUM BREAKER
A device containing one or two independently operated spring-loaded
check valves and an independently operated spring-loaded air inlet
valve located on the discharge side of the check or checks. The device
includes tightly closing shutoff valves on each side of the check
valves and properly located test cocks for the testing of the check
valve(s).
REDUCED PRESSURE PRINCIPLE DEVICE
An assembly consisting of two independently operating check
valves with an automatically operating differential relief valve located
between the two check valves, tightly closing shutoff valves on each
side of the check valves plus properly located test cocks for the
testing of the check valves and the relief valve.