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Attachment 1 SCG Response to Council RFI · OPW22/0319

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SCG

CONSULTING
ENGINEERS

28 February 2023
SCG Ref: 31030(L2)

By email: [email protected]

Noosa Shire Council
P.O. Box 141
TEWANTIN QLD 4565

ATTENTION: Mark Lewis

Dear Mark

Re: MCU21/0083 & OPW22/0319 ~ Lot 2 RP73072, Lot 1 RP73072 #25 & 27 Toolar Street, Tewantin

 

We have reviewed Noosa Council’s OPW22/0319 request for information dated 31 January 2023 and provide our
response to the Engineering related items.

Issue 1: Condition 29 of MCU21/0083 has not been fully addressed

Provide amended plans which fully address Condition 29 on MCU21/0083 and which specifically:

1.1 Include provision of a backflow prevention device on the connection between the detention tank and
roof water tank

1.2 Nominate litter baskets on all stormwater pits within the site

Response:
Backflow prevention measures are included on the hydraulics consultant's documentation. These

requirements should be approved through the building application process, not operational works.

We have nominated gross pollutant trap insert (GP) filters on the grated stormwater pits across the site
on our revised stormwater drainage plan attached.

Issue 2: Condition 30 of MCU21/0083 has not been addressed

Provide amended plans and supporting calculations which fully address Condition 30 of MCU21/0083. If
the applicant does not have the capability to undertake modelling, then a deemed-to-comply approach
such as that nominated in Section 4.3 of the Flooding and Stormwater Management Guidelines (SCC
2020) may be an acceptable alternative. Include calculations for the maximum water level in the detention
tank and demonstrate that freeboards are met

Response:
We have included results from our drains analysis for the detention/re-use water tanks sizing on our

revised stormwater drainage plan attached. The analysis has used ensemble temporal patterns sourced
from the Bureau of Meteorology.

p: 07 5455 5604

F: 07 5455 5696

e: [email protected]

Ww: www.scg-engineers.com

PO Box 1661 Noosa Heads QId 4567

Unit 1/11 Project Ave Noosaville Qld 4566 STRUCTURAL | CIVIL | GEOTECHNICAL

Debuild Pty Ltd Trading as ~~ ABN 40 098 481 899
Full text of the other 2 pages

Page 2

Issue 3: Freeboard to Unity FFL’s

Some of the nominated Unit FFLs have minimal elevation above the driveway levels and resulting surface
stormwater flows. Consider improving the resilience of the units to local flooding by providing a step-up
into the units from the carport and garage areas.

Response:
There is adequate fall away from the dwelling to protect against stormwater inundation. The driveway
level referred to by Council is at one location at the high side of the driveway and will not impact.

Issue 4: The applicant has not provided sufficient information to demonstrate compliance with Conditions
42-45 of MCU21/0083

Provide the required Operational Waste Management Plan that demonstrates compliance with the

conditions. The plan must include but not be limited to:

4.1 Load rating on the underground tanks. Please note that refuse collection trucks weigh 23.5T

4.2 The Location and number of 1100 litre bins

4.3 The expected service levels (Refuse, Recycle and Garden)

4.4 Clarification if the pedestrian shared zone has an awning and suitable horizontal and vertical
clearances are available for the whole length of the refuse collection truck route within the site

Response:
4.1 The water tank is specified to be trafficable on our plans. We don’t believe this should be a concern for
Council as it becomes Council infrastructure.

4.2-4.3 Response by others.

4.4 There is no overhang or impediment to vehicle movements along the pedestrian shared zone.
Issue 5: The submitted plans do not provide sufficient information to demonstrate how service provision
(i.e. the location of the Pad Mount Transformer, fire fighting booster pump, water, sewer, power, WSUD,
loading bays, waste bin storage etc) will impact on the provision of landscape areas to meet Performance
Outcomes PO1, PO2, PO3, P12 of the Landscape Code in relation to the sites general amenity, the
provision of shade and a sustainable outcome

Provide a Consolidated Services Plan to demonstrate how the applicable Performance Outcomes can be

achieved. This may include:

5.1 A single overlayed plan to show areas of deep planting exclusive of services where trees are capable
of being planted and allowed to grow to full form without management input (heavy pruning, removal,
interference with infrastructure

5.2 The location of the Pad Mount Transformer

5.3 The location of the fire fighting booster pump

Response:
5.1 By others.

5.2-5.3 Our understanding is there isn’t a requirement for a pad mount transformer of fire booster pump.
Issue 6: The submitted plans do not demonstrate compliance with a few of the conditions MCU21/0083
Indicate on the plans the directional signage as described in Condition 27

Response:
A directional sign has been shown on our revised plan attached.

Issue 7: Flooding

Amend the relevant plans to indicate the 2m wide footpath as described in Condition 28

SCG Consulting Engineers Page 2 of 3 SCG Ref:31030(L1)

Page 3

Response:
This has been shown on our revised plans attached.

If you require any further information, please do not hesitate to contact our office.

Yours faithfully

SEAN RICHARDSON — RPEQ 5835
For and on behalf of
SCG CONSULTING ENGINEERS

Enc SCG Drawings Numbers: 31030 —-OW3.1.RevA, OW51.1.RevA & OW5.2.RevA

Ce: (By Email [email protected])

SCG Consulting Engineers Page 3 of 3 SCG Ref:31030(L1)

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