OPW20.0191 NC IR response

   •   Within 18 hours of a rainfall event of sufficient intensity and duration to cause
       runoff from the site.

2.7
Topsoil is proposed to be stockpiled on site north west of the main sediment dam. A
sediment fence is to be located around the perimeter of the topsoil stockpile.

NC Information Required for Item 3

Provide CPESC certification that all proposed E&S controls, for each of the proposed
construction stages, have been sized in accordance with relevant standards and
legislation, and suitable contingency measures will be available onsite, or able to be
deployed to site prior to being required.

Engineering Response to Item 3

The Erosion and Sediment Control Plans have been designed and checked by Chris
Gibberd who is an RPEQ. All of the Erosion and Sediment Control devices have
been designed in accordance with all relevant standards and legislation. The main
contractor has confirmed that they have access to erosion and sediment control
measures including a pump to ensure that the sediment dams are drained prior to
expected large rainfall events.

Issue relating to NC Item 4-5
The provided documentation lacks detail with regards to the proposed swale drains
and stormwater outlets into receiving waterways.

NC Information Required for Item 4
Demonstrate how Performance Outcome PO10 of the Water Quality and Drainage
Code will be achieved.




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