the oil immediately sinks through the oil to the bottom of the drum. The action of the
urinoil is somewhat like that of a barometer. As more urine is added, the level rises
within the 3-inch diameter pipe until it reaches the level of the notches in the 1 1/2-inch
diameter overflow pipe in the center of the drum. The atmospheric pressure, together
with the weight of the oil, causes the urine to overflow until equilibrium is reestablished
within the drum. The oil acts as an effective seal against odors and against the
entrance of flies. The screen is easily lifted with attached hooks for removal of debris.
The urinoil is operative in place for as long as the soakage pit will accept the urine.
Figure 3-10. Urinoil urinal.
URINAL FACILITIES USED IN HIGH WATER TABLE OR ROCK FORMATION
When the water table or a hard rock formation near the surface precludes digging
the standard 4 feet for a soakage pit, a soakage trench as described in paragraph 3-7b
may be used in lieu of the soakage pit.
Section II. KITCHEN AND OTHER LIQUID WASTE DISPOSAL
KITCHEN WASTE FACILITIES
Liquid wastes from food service operations contain particles of food, grease, and
soap. Consequently, this liquid requires treatment and/or removal before it is allowed to