geotech report · 132003.220660.5

4.3.2 Groundwater and Surface Drainage
As noted in Section 4.2 above, no groundwater was noted within the depth of the previous ASI investigation.
However, we note that variations can occur with groundwater conditions, especially after heavy or prolonged
rainfall.

Based on the topographic setting of the site, surface run-off would be expected to discharge down to the
north-east and east from the access road and driveway through the site into the tree covered bushland below
and primarily into the gully over the eastern side of the site. Locally run-off would be collected in the existing
access road and driveway drainage, and the stormwater drainage and retaining wall drainage (where present)
within the site.

There was also localised erosion at the discharge point of a stormwater pipe close to the south-eastern corner
of the site (see Plate 3).




Plate 3: Localised erosion at the discharge area of the stormwater pipe (south-eastern corner of the site)




32032URrpt                                          6