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Lining.
Line the sides of the pit with geotextile to prevent the filling material around the tank from
subsiding sideways, causing gaps which would lead to differences in the pressure applied to
the tank.
Installation substrate.
Create a layer of sand at least 5 cm deep on the bottom of the pit or above the plinth so that
the tank is resting on an even, compact base and is not directly touching the bottom of the
pit or the reinforced concrete plinth.
Pits with groundwater.
During creation of the pit, it is essential for the tank installation site to be dry to allow the
operations to be carried out correctly. Therefore, any water from shallow aquifers must be
removed, with the aid of pumps, for example.
Lay a reinforced concrete foundation capable of withstanding the pressure from the aquifer
underneath.
3.3
POSITIONING AND ANCHORING THE TANK
ENGLISH
POSITIONING THE TANK
Before placing the tank in the pit, it is essential to make sure that the gaskets, pipes and all non-
polyethylene parts in the tank are suitable for the liquid it is to contain.
ANCHORING
During construction of the substrate, provide and position sunken anchor fittings around the tank,
referring to the dimensions provided in the technical information and bearing in mind the type of
tank to be installed.
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