Geology Reference
In-Depth Information
• the area around S1 where the soil cover is thin;
• the area around S5 and E1, where the clayey soil is not permeable
enough.
There remains a surface of around 250 m
2
, with an average permeability
of 45 mm·h
-1
, which should be adequate in order to accept the leaching
fi eld.
130.0
131.0
130.0
Parking
lot
130
129.5
North
125.0
Figure 14
Usable area for the leaching fi eld.
The residence is intended for 6 people (5 rooms), which represents a
wastewater production of around 1500 L per day. This requires a leaching
fi eld of around 45 m
2
, and a total channel length of 90 m (with a width of
50 cm). The channels must be spaced 1.5 m apart. One could, for example,
build 3 channels of 30 m each, for a total leaching fi eld surface of 30 x (0.5
+ 1.5 + 0.5 + 1.5 + 0.5) = 135 m
2
.
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