PROBLEMS - Hydrogeology: Objectives, Methods, Applications - page 338

This example, drawn from a real case, is very frequently
encountered.
Problem #10—Location of an individual wastewater system
A residence is under construction. It is surrounded by other buildings and
is located in an area with no sewer connection. An individual wastewater
system must be included, consisting of a septic tank for all water and
of dispersion channels for the effl uent. Pumping into existing sewers at
a higher elevation is not allowed, and the following distances must be
observed: 5 m from the residence and from the property limits, and 10 m
downhill.
The hydrogeologist had the following information available:
• Description of the residence: 150 m 2 villa with two fl oors: entrance
hallway, living room, sitting room, offi ce, 3 bedrooms, 2 bathrooms, 1
kitchen;
• Floor plan (Figure 13).
Figure 13 Floor plan and position of boreholes and permeability tests.