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Response 22.02.02 From SCG - 31073(L2) · OPW21/0315
2 February 2022
SCG Ref: 31073(L2)
By email: [email protected]
F & M De Pasquale
c/- Martoo Consulting
Dear Sir/Madam
Re: Council Information Request OPW21/0315 ~ 33 Wyuna Drive, Noosaville
This letter is in response to Noosa Council’s Information Request dated 22/11/2021 and we have addressed the
engineering components of this information request and respond as follows: -
Issue 1 – Dewatering
a) Additional soil testing has been conducted by Douglas Partners following the demolition of the existing
dwelling. Please refer to the amended Geotechnical report attached, Douglas Partners project
95120.01.R.001 dated 1 February 2022.
b) The proposed building plans consist of excavations up to 3m below existing ground levels in an Acid
Sulphate Soil (ASS) Hazard Overlay Zone (5m AHD or below). Therefore, the disturbance of potential acidic
soils cannot be avoided. Any exposed ASS as a result of excavations are to be treated in accordance with
the site-specific ASS management recommendations as described in Douglas Partners Geotechnical report
project 95120.01.R.001 dated 1 February 2022
c) As the supervising RPEQ, SCG Consulting Engineers will undertake numerous site inspections
throughout construction including, but not limited to; initial pump out, basement foundations, block work,
suspended slabs etc. Douglas Partners as the Geotechnical engineer will also undertake inspections and
testing following basement excavations prior to slab preparations. Additionally, the appointed piling and
dewatering contractor will provide design and installation certification (Form 15 & 16) of the works, as well
as frequent on-site inspections and testing whilst the site is dewatered.
d) The dewatering methodology proposed will consist of dewatering spears installed to the inside the
proposed concrete piled retention (cut-off) wall this will maintain groundwater levels outside the proposed
piling walls to existing levels resulting in little to no drawdown of the water table outside the excavation
footprint. Dilapidation reports for both neighbouring properties have been conducted by Building Inspections
Noosa, refer attached.
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f) As per Item 1d, the concrete pile retention is to be constructed on the property boundary and therefore,
external monitoring bores cannot be installed ddue to limited space.
Issue 2 – Dewatering
c) A building contract will not be awarded until all development approvals are in place, therefore a specialist
piling, and dewatering contractor is yet to be appointed. All on site dewatering will be in accordance with
the dewatering management plan prepared by ADG Consulting. We request for this information to be
provided to Noosa Council prior to installation.
d) As per Item 2c, ADG Consulting have amended the dewatering management plan to show approximate
tank locations. Any additional tanks required that cannot be accommodated within the property boundary
will seek a road reserve permit from Noosa Council.
f) The proposed dewatering system is powered by Three Phase electric motors which are far less noisy
than diesel pumps and generators. This will be accompanied with acoustic matting to further absorb any
noise from the electric pumps.
Issue 3 – Stormwater Management
Internal drainage design is to be completed by a hydraulic consultant in accordance with the National
Construction Code (NCC) 2019 - Volume 2 and AS 3500.3.2-2018 – Stormwater Plumbing and Drainage.
We have amended our Stormwater Management Plan (SCG Drawing No. 31073-SW1.1) to note, all roof
drainage is to be connected to the Wyuna Drive kerb and channel in accordance with the Noosa Plan to
Council standard detail IPWEA RS-081.
Should you require any further information, please do not hesitate to contact this office.
Yours faithfully
Checked by
TOM HARRINGTON SEAN RICHARDSON – RPEQ 5835
For and on behalf of for and on behalf of
SCG CONSULTING ENGINEERS SCG CONSULTING ENGINEERS
Enc Douglas Partners report 95120.01.R.001
Building Inspections Noosa, report for 35 Wyuna Dr, Noosaville dated 10/11/21
Building Inspections Noosa, report for 29-31 Wyuna Dr, Noosaville dated 10/11/21
SCG Consulting Engineers Page 2 of 2 SCG Ref: 31073(L2)
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Response 22.02.02 From SCG - 31073(L2).pdfRelated documentApplication case desk ↗
22.02.02 From SCG - 31073(L2).pdfRelated documentApplication case desk ↗
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