RFI Response_151020

maintained to a standard which would achieve at least 80% of the average annual runoff volume of the
contributing catchment treated (i.e. 80% hydrological effectiveness) to 50mg/L Total Suspended Solids
(TSS) or less, and pH in the range (6.5–8.5).

Information Required
3. Provide a sediment and erosion control plan certified by a Certified Professional in Erosion and
    Sediment Control that it is consistent with the International Erosion Control Association Best
    Practice Books as well as State Planning Policy requirement for erosion and sediment control on
    construction sites larger than 2500m2.
Response
Please refer to the civil engineering response and amended Erosion and Sediment Control drawings
for a response to this item.

Issue
The application proposes construction of an approximately 500m2 hardstand driveway, allotment
reshaping and redirection of sheet flows to concentrated flow outlets. Where not appropriately
managed, these cumulatively will increase scour and impact the quality of runoff via increased peak
runoff from both the hardstand and outlet pipes. Further it is unclear how runoff from the driveway will
be treated to achieve the no worsening requirement for water quality in the drinking water supply
catchment.

Information Required
4. Demonstrate how the changed peak flow and water quality from the driveway as well as funnelled
    through each stormwater outlet will be managed to achieve the requirement of no worsening of
    water quality running off site.
Response
Please refer to the civil engineering response, revised civil engineering plans and MUSIC model for a
response to this item.

                                    END INFORMATION RESPONSE

Part 3: Information Request has now concluded and the application is now in Part 5: Decision.

Should you have any questions with respect to the above, please do not hesitate to contact me direct.

Yours faithfully
PROJECT URBAN




John McKennariey
Director
Email: [email protected]