Attachment 3 - Stormwater Management Plan 1856-SBSMP-01 v5 (December 2019) · RAL18/0023

 

CONCRETE MIXER CLEAN-UP

Fully contain concrete waste washed from trucks and mixer units on-site and store where it cannot be washed from
the site, harming the environment.

EXPOSED AGGREGATE CONCRETE SURFACES

¢ Builders need to demonstrate how they intend to prepare exposed aggregate surfaces without allowing cement
residue to flow into stormwater drains or waterways.

¢ Where practicable, wash cement residue onto pervious surfaces or fully contain it within temporary sediment
dams created from tightly stacked sand bags.

¢ When suitably dry, shovel cement residue into a waste disposal bin.
¢ — Atno time should cement residue or wastewater run-off enter the roadside gutter.

This may make it impractical on some sites for exposed aggregate driveways to be constructed. In such cases,
an alternative driveway finish must be used.

Storage of materials on hard surfaces

Whenever possible, materials should be stockpiled within the sediment
control zone and, where necessary, covered with waterproof sheeting to
minimise the potential for transport of sediments in stormwater.

Materials may be temporarily stored on hard surfaces only where it is
necessary to place erodible material on hard surfaces to undertake
work and no other reasonable options are available.

 

Don't store stockpiles on hard surfaces without
suitable protection

Grouped building lots

When one builder controls more than one building lot, combined-lot sediment control structures may be placed

down-slope if:

¢ the combined sediment control measures provide a level of protection at least equal to that provided by
individual lot protection

¢ — The builder accepts responsibility for the ongoing monitoring and maintenance of sediment control devices

* suitable drainage and erosion control measures are applied to each building lot

¢ — asuitable sign is placed in a prominent location outside each lot and/or at the entrance of the
estate indicating such controls are in place.