5. Attachment D - Stormwater Response

23 September, 2016                          -4-
Our File Ref: B16239CL002
Contact: Kym Huddart



Item 8

Issue – Acid Sulphate Soils
Excavations are proposed below the elevation of 5m AHD and therefore Acid Sulphate
Soils assessment becomes relevant.

Information Required
Demonstrate how excavations and bedding for pipework below the elevation of 5m
AHD will not result in dewatering, or the release of metals via oxidation of Acid Sulphate
Soils.

Lambert & Rehbein Response
Filling and excavation will be carried out in accordance with the Acid Sulphate Soils
Management Plan (ASSMP) which will be prepared for the development. We request
that the requirement for an ASSMP is conditioned.

Item 9

Issue – Water reuse
Specific Outcome O3 of the Water Sensitive Design Code requires captured water to be
used for all non-potable uses on site. The application does not propose any water
capture or reuse.

Information Required
Review the Stormwater Management Plan to include opportunities for capture and reuse
of stormwater.

Lambert & Rehbein Response
It is proposed to direct roofwater runoff from the Coles Express, Food Shop and Fuel
Canopy to an above ground rainwater tank/s located at the rear of the site for non-
potable water reuse (e.g. garden irrigation and non-potable water supply at bowser).
Overflow will be directed to the StormFilter and detention tank for treatment and flow
attenuation prior to leaving site. It is proposed to provide pumps and potable water top
up for the tank/s. The size of the rainwater tanks will be based on the anticipated roof
water capture and reuse requirements. These details can be provided at the operational
works/plumbing application phase.