Attachment 7- Site Based Stormwater Management Plan

 

Erosion controls eazam=z
MINIMISE DISTURBANCE

¢ — Earthworks should be kept to a minimum, and should only be commenced immediately prior to building works.

¢ Maintain as much soil coverage as possible with the use of grass, leaf litter and mulch, gravel or erosion control
blanket (ECB) or matting.

* Vegetation located down-slope of the work site assists in filtering out sediment. Where practicable, maintain
kerb vegetation such as grass and turf strips in a healthy state during the building process.

 

"STOCKPILES

° Stockpiles and building materials should not be stored
on the footpath or within the road reserve. Permission
must be obtained from your Council to store materials
in these areas otherwise fines may be imposed.

° Minimise stockpile losses with the use of covers.

° All stockpiles and building materials should be located
within the sediment control zone, for example up-slope
of a sediment fence.

 

° Stockpiles must not be located within an overland flow
path.

Stockpiles without protection

Backfill service trenches, cap with topsoil, and compact to a level at least 75-100 mm above the adjoining ground
level (either manually or with a small machine). This allows for some subsidence of the fill material, and ensures the
fill is sufficiently compacted to avoid erosion at a later time. (Note that trenches must be backfilled in accordance
with AS3500).

EROSION CONTROL BLANKETS OR MATTING
Erosion contro! blankets or matting can be used to minimise
soil erosion and stormwater pollution from sites by:

* containing high erosion risk soils

¢ — stabilising steep slopes.

All areas disturbed by building activities should be promptly
and progressively stabilised, using techniques such as
revegetation and landscaping, so they no longer act as
sources of sediment.

 

MULCHING AND GARDEN BEDS.
To minimise soil loss, mulch should be applied to open Rehabilitate the site promptly'to reduce the chances
garden beds at a depth of 75-100 mm. of further erosion

This will assist in plant establishment, minimise water
loss and help to control weeds.

Ensure that mulch is stabilised on unstable slopes (e.g. batters and riparian areas) to avoid it washing away and
ultimately entering waterways.