MIL-HDBK-1027/1B
g) Pumps which take suction from the equalization
tank should be protected by a low level shutoff switch.
5.3.4
Recovery. Wastewater recovery normally cost more than
purchase, treatment, and disposal of potable water. In some
instances, however, water use may be restricted and the more
expensive route will be necessary. Recycled water should not
cause a health hazard and should be compatible with device
sensors. To avoid a health hazard, organic materials added
during firefighting should be removed and the water should then
be made clear since the device sensors use opacity to
differentiate between foam and water. A carbon absorption
procedure would be required to remove the organic material
followed by a reverse osmosis system to remove the remaining
dissolved solids and clear up the water. Since there are
chemical compounds which are not removed by the above processes,
the addition of new water and blow down would still be required.
If recycling water is a serious consideration, more study would
be required by the cognizant EFD to derive an acceptable system.
a) Wastewater associated with firefighting structures
have low suspended solids, high dissolved solids (DS), high BOD,
high COD, high pH, and high total toxic organics (TTO) levels.
Recycling will arithmetically escalate the untreated portions of
the wastewater (DS, BOD, COD, pH, and TTO), after each training
scenario, to such high levels that device sensors and training
personnel's health could be effected. Also, high levels of TDS,
BOD, COD, pH, and TTS may prevent direct discharge into a
sanitary sewer. The recycling system should consider each of
the portions. The device sensor water requirements are given in
the chart below:
pH Range
7.5 (max) - 6.5 (max)
Particle Size
40 microns
Color
None
Refoaming
Should not foam when sprayed
Safety
Not harmful to personnel
b) Recycling of water does not effect the storage
requirement for potable water. The EFD environmental quality
division should determine the required wastewater treatment,
applicable regulations necessary to obtain the wastewater
permit, and the necessity of required environmental studies of
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