Geoline installed two liners for the rain garden/ bio-rention beds in Mulgrave. We installed rectangular garden beds out of 1.5mm HDPE geomembrane. Each rain garden bed had two pipe penetrations, one stormwater inlet to allow the water to filter thru the media and one at the bottom to drain out to normal stormwater drains.
One was installed in concrete culverts above the ground and the other was installed in an excavated clay hole below ground level. .