acceptable by the local, State, or Federal environmental
18.104.22.168 Potable Water.
a) Firefighting facilities based on the 19F and 21C12
series trainers should use fresh water throughout. Salt water
cannot be used because of the corrosive effect on the expensive
b) Recycled water can be used. Previous tests have
indicated that wastewater treatment would be required to provide
recycled water. The training structure effluent contains a
large chemical oxygen demand (COD) that would have to be removed
before delivering it back to the fire field. Refer to par.
5.3.3 for wastewater characteristics.
c) Water delivered to the site should be metered and
supplied through a backflow preventer in accordance with AWWA
C506, Backflow Prevention Devices--Reduced Pressure Principle
and Doublecheck Valve Types. The pressure drop of this
equipment must be considered when calculating the availability
d) The range for water or foam pressure at the hose
nozzle for the 19F series trainers is 820 to 965 kPa).
Submarine trainers (21C12) should also require a minimum nozzle
pressure of 820 to 965 kPa. The total discharge head of each
pump should allow for hydraulic losses and wear.
e) The water system should be sized by summing the
demand and consumption listed herein for each 19F and 21C12
f) During the development of the project, the EFD
Code 16 (Utilities Division) should verify a reliable source of
a once-through water system. Water flow tests should be
conducted to determine the adequacy of the water supply system.