fig9 2

9a o. 1

8

11 o, o

9b 10

Key 1	Subsoil	6	Geotextile T	11	End connection with ventilation and
2	Geotextile B or	7	Backfill		access
	mesh, when required	8	Distribution chamber	U	Distribution layer length 4 m to 30 m
3	Sand	9a	Connection pipę, pre ssure	O,	Overlap on the side, upwards, > 0,2 m
4	Distribution layer	9b	Connection pipę, gravity	o2	Overlap two sheets, > 0,2 m
5	Infiltration pipę	10	Pumping chamber with pump