Figure 4-15. Barrel filter grease trap.
In places where clay soil prevents the use of standard soakage pits, evaporation
beds (figure 4-16) may be used if the climate is hot and dry.
a. Construction. Enough beds measuring eight feet by ten feet are constructed
to allow three square feet of surface area per person per day for kitchen waste and two
square feet per person per day for wash and bath wastes. The beds are spaced so that
the wastes can be distributed to any one of the beds. A bed is constructed as follows.