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9.6 Administration of a Cross-Connection Control Program
9.6 ADMINISTRATION OF A
water. The water purveyor (supplier) is held responsible for
compliance with the provisions of the Safe Drinking Water
CROSS-CONNECTION CONTROL PROGRAM
Act, to include a warranty that water quality provided by its
9.6.1 Responsibility
operation is in conformance with the U.S. EPA standards at
Under the provisions of the Safe Drinking Water Act, the
the source and is delivered to the customer without the qual-
ity being compromised as a result of its delivery through the
federal government has established, through the US Envi-
ronmental Protection Agency (U.S. EPA), national standards
distribution system.
for safe drinking water. The states are responsible for the
water purveyor when considering cross-connection protec-
enforcement of these standards as well as the supervision
of public water supply systems and the sources of drinking
tion to commercial, industrial, and residential customers.
Air conditioning cooling tower Figure 9.29 depicts several options that are open to a
Fixture outlet Post mix
protective beverage Reduced pressure zone
devices machine backflow preventer
Backflow preventer Internal protection
with intermediate devices
atmospheric vent
Laboratory faucet double
check valve with Reduced
intermediate vacuum breaker pressure zone
backflow
preventer
Process tank
Laboratory sinks
Reduced
Atmospheric pressure zone
vacuum
backflow Photo
breaker
preventer developing
equipment
Dishwasher
Hose Double check valve
vacuum backflow
breaker preventer
Cafeteria
cooking
Slop sink kettle

Reduced pressure Reduced pressure
Dedicated zone backflow zone backflow
line preventer preventer Boiler

Containment device
Figure 9.29 Cross-connection
preventers.