Translations:Versickerung und Retention/156/en

Trenches behind small wastewater treatment systems

Required wall area (m2/inhabitant value PE):
1 m2 / PE to 1.5 m2 / PE with:		Sand-gravel mixture, sand, light silty sand
2 m2 / PE to 2.5 m2 / PE with:		Silt (also light clay), sand-silt mixture, stone-loam mixture
Required number for example of DRAINMAX Tunnel:
Base element	2.25 m length x 0.8 m heigth x 2 sides
As	= 3.6 m2 per tunnel without front walls
PE	to 1.5 m²/PE	to 2.5 m²/PE
4	1 pcs.	2 pcs.
8	1 pcs.	4 pcs.
12	3 pcs.	6 pcs.
16	4 pcs.	8 pcs.

A specified calculation must be done with other soil conditions and higher PE values.