fig4 2

B-Br^ 90°

Key
A	Longitudinal cross section	8	BackfiN	Dą Distribution layer thickness beneath
B	Plan	9	Optional end connection with	infiltration pipę, 0,15 m to 0,3 m, see
C	Cross section		ventilation and access	Table 3
1	Subsoil	10	Geotextile T	Ds min 1 m
2	Distribution layer	D,	Total depth, 0,6 m to 1,0 m	Wi Natural ground width between
3	Infiltration pipę	d2	Backfill depth > 0,2 m	trenches > 1 m
4	Sand layer	d3	Infiltration pipę diameter + 0 m to	IV2 Distribution layer width 0,5- m to
5	Connection pipę		0,1 m of granular fili materiał (same	1,5 m
6	Distributon chamber		as in the distribution layer)	Li Distribution layer length < 30 m
7	Distribution pipę			Area =E (L, x W2)