Many homeowners and tank installers in Germany are often not even aware of this: Here too, in the seemingly safe heart of Europe, a large area is designated as an earthquake zone. So if you live in one of these areas and want to install a new tank for storing heating oil, you should make sure that it is also approved for the corresponding earthquake zone.
The classification of the regions in the earthquake zones is illustrated by a map of the German Geo Research Center. If you are not sure whether your region is classified accordingly, you can carry out an online query for your place of residence here.
https://www.gfz-potsdam.de/din4149_erdbebenzonenabfrage/
Haase was the first tank manufacturer to prove the seismic safety of its tanks and received approval from the German Institute for Building Technology (DIBt). The necessary stability tests have once again shown what the material GRP can do: For most tank types, the double-walled design, which has been tried and tested for several decades, can be used without additional effort.
In earthquake zone 3, the highest in Germany, only an inexpensive non-slip mat has to be placed under the tank instead of the commonly used felt. If you want to install a tank in an earthquake-prone area, you should therefore have the corresponding approval from the German Institute for Building Technology (DIBt) presented for this tank.
As you can see, you see nothing: a double-walled Haase basement tank with anti-slip mat that was installed in an area of earthquake zone 3. The approval of the DIBt does not impose any further requirements.