4rain FLAT S Notice D'installation Et D'entretien page 43

5.3.2 Positioning on a slope, embankment etc.
If the tank is installed in immediate proximity (less
than 5 m) to a slope, mound or embankment
(greater than 5° incline), a statically calculated
supporting wall must be constructed to bear the
pressure of the soil. The wall must exceed the tank
dimensions by at least 500 mm in all directions and
must be at least 1000 mm away from the tank.
5.3.3 Groundwater and cohesive (non-water-permeable) soils (e.g. loam)
The tanks must not be installed in groundwa-
ter/standing groundwater. Even if groundwa-
ter/standing groundwater is expected to occur only
infrequently, drainage must be installed.
If necessary, the drainage pipe must end in a verti-
cal DN 300 pipe in which a submersible pressure
pump is fitted to pump out the excess water. The
pump should be checked regularly.
5.3.4 Installation next to traffic areas
If the underground tanks are installed next to road-
ways, the minimum distance from these surfaces
must be at least the depth of the trench (H).
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5 Installation and assembly
Fig. 22:Installation on a slope – example with FLAT
Fig. 23: Installation in a pit carrying water – example
Fig. 24:Distance from roadways – example with
FLAT
43 / 108
with FLAT