132003.221132 (23616DA) - Doonella Estate - Road Traffic Noise Assessment Report

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CONSULTING ENGINEERS

Contents

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Introduction... I
Study Area Description. |
Existing Noise Levels wins si a
Road Traffic Noise Critena SH 3
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4.1 Noosa Shire Council
42 Summary of Criteria wt
Traffic Noise Model 208 scytiieaorsaatine 5
5.1 Traffic Noise Modelling Input Data...
5.2 Venfication of Traffic Noise Model...
5.3 Prediction Methods,
5.4 Traffic Noise Predictions.
Discussion of Predicted Noise Levels.
Noise: Control Measures isissiscsusiassiicsisissisnivesunistnnisiivsn oasisinieboeatdebianad

7. Architectural Treatments iissiswsaisinssitisatntsasosttnaistieiduisucnisainws |

 

 

 
  
 

 

 

 

 

8 Recommendations 7 wlS
9 Conclusion we weno! 1S
APPENDIX Avssse sie cites yoesaasompaaall ©

 

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| Introduction

ASK Consulting Engineers Pty Ltd was commissioned by PMM Group c/ Lensworth Lake Doonella Pty
Ltd to undertake a road traffic noise investigation for a proposed residential development to be
located adjacent to Beckmans Road, Tewantin.

The purpose of this report is to:

. predict the extent of road traffic noise levels at proposed residential dwellings adjacent to
Beckmans Road;

° assess traffic noise with respect to Noosa Shire Council guidelines; and

. if necessary, propose ameliorative measures required to meet Noosa Shire Council road

traffic noise criteria,

2 Study Area Description

The subject site is located on the northern side of Beckmans Road, which is a two lane road.
Beckmans Road runs in an east-west direction. The subject site slopes down from Beckmans Road
away to the north. The proposed land use is to be urban residential. Figure | illustrates the locality
of the site. The subject site is shown on Figure 2.

The format of the residential dwellings to be constructed on the subject site has not yet been
determined.

To the west of the subject site is the Tewantin Primary School. There is a golf driving range directly to
the east of the subject site.

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3 Existing Noise Levels

ASK Consulting Engineers carried out a noise survey at Location A, to the west of the subject site, on
27 February 2004. Location A is shown in Figure 2A.

The noise survey was carried out to the west of the subject site at Location A as a secure site for the
noise logger was not available on the subject site. The nature of Beckmans Road adjacent to the
subject site and Location A is similar. Beckmans Road is a two-lane road and the road surface is chip
seal adjacent to the subject site and Location A. The sign posted traffic speed is 60 km/h and 80 km/h
adjacent to the subject site and location A respectively. The difference in sign posted traffic speed has
been accounted for in the road traffic noise model. The nature of the terrain at Location A is
considered to be representative of the terrain on the subject site. Therefore the verification of the
road traffic noise model at Location A is considered to be acceptable.

The road traffic noise level survey carried out at Locations A is free field. Noise monitoring Location
A is approximately 10m from the edge of Beckmans Road.

Monitoring was undertaken using a calibrated ARL noise logger. The logger was configured to obtain
statistics over 60 minute periods. The weather was fine and clear.

Appendix A illustrates the noise levels recorded at Locations A. The noise levels obtained are
expressed in terms of the Lmax, Leq, Lio, and Loo. The Lia and Lso are respectively the A-weighted
noise levels exceeded 10%, and 90% of the time. The L9o is commonly referred to as the background
noise level. The Leg is the energy average noise level containing the same acoustic energy as the actual
fluctuating noise level. The Lmax is the adjusted average maximum noise level.

Table 3.1 shows a summary of the noise levels measured at Location A. Typical noise sources at
Location A include road traffic noise from Beckmans Road.

 

 

 

 

 

 

 

 

 

 

 

 

Table 3.1 Noise Level Measurement Summary
Start Date Noise Level Parameter dB(A)
L10(1 8hour) Maximum Maximum Night L9o(8hour) L90( 1 8hour)
dB(A) Daytime Time dB(A) dB(A)
Leq(I hour) Leq (1 hour)
dB(A) dB(A)
69.9 68.5 62.5 34.6 498
27/2/2004
(06:00 — 00:00) (06:00 — 22:00) (22:00 - 06:00) | (22:00 - 06:00) (06:00 — 22:00)
Note: Noise level measurements are free field.

Daytime is taken to be 6am to |Opm and night time |Opm to 6am.

The measured L1o(18 hour) noise level at Location A is 69.9 dB(A).

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4 Road Traffic Noise Criteria

4.1 Noosa Shire Council

Noosa Shire Council (NSC) recognises the Queensland Department of Main Roads (QDMR) “Road
Traffic Noise Management: Code of Practice’ as the relevant traffic noise assessment policy.
Therefore the following road traffic noise criteria are applicable:

The Queensland Department of Main Roads (QDMR) "Road Traffic Noise Management: Code of
Practice” has provisions with respect to the category Bé ‘Proposed Residential Developments”. For
this scenario the QDMR recommend:

° the Lio (18 hour) should be equal to or less than 60 dB(A), where existing levels measured at
the local government deemed-to—comply dwelling setback distance are greater than 40 dB(A)
Ls0 (8 hour) between 10 pm and 6 am; or

° the Lio(I8 hour) should be equal to or less than 57 dB(A), where existing levels measured at
the local government deemed-to-comply dwelling setback distance are less than or equal to
40 dB(A) Loo (8 hour) between |0 pm and 6 am;

° where the above criteria cannot be met, internal maximum design levels specified in Table |,
AS2107 - 1987 and shown in Table 4.1 of this report.

The Queensland Department of Main Roads also recommends noise level limits for balconies and
formal open space. Formal external space is defined as the private or communal recreational area
“required” by a local government. For this scenario QDMR recommend:

° the Lio (18 hour) should be equal to or less than 60 dB(A), where existing levels measured at
the local government deemed—to—comply dwelling setback distance are greater than 45 dB(A)
Leo (18 hour) between 6 am and 10 pm; or

e the Lio(18 hour) should be equal to or less than 57 dB(A), where existing levels measured at
the local government deemed—to—comply dwelling setback distance are less than or equal to
45 dB(A) Lso (18 hour) between 6 am and 10 pm.

All external noise levels stated are free-field with the expectation that an additional 2.5 dB(A) increase
is applied for the facade correction when the building is constructed. This will achieve a level of equal
to or less than 63 dB(A) and 60 dB(A) respectively, | metre from the most exposed facade of a
building. . .

Australian Standard AS2107 — 1987 has been superseded by AS2107 -— 2000. The Queensland
Department of Main Roads (QDMR) “Road Traffic Noise Management: Code of Practice’’ has not
been revised to acknowledge the amendments to AS2107. Internal noise level limits from AS2107 -
2000 are shown in Table 4.1 as the most current criteria for habitable rooms. During the daytime,
AS2107 noise levels will apply to living areas and at night time AS2107 noise levels will apply to
sleeping areas. Daytime is taken to be 6am to |Opm and night time |Opm to 6am.

The Lio(18 hour) has been adopted by the QDMR to assess the impact of road traffic because it is
widely considered to have an adequate correlation with human response to road traffic noise. The
Lio(18 hour) noise level is the arithmetic average of 18 hourly Lio noise levels between the hours of

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CONSULTING ENGINEERS

6:00 am and 12:00 midnight on a typical weekday. The Lio noise level is described as being the noise
level exceeded !0% of the time.

The L90(8 hour) and Ls0(18 hour) noise levels are the arithmetic average of the hourly Ls0 noise
levels between the hours of 10:00 pm and 6.00 am and 6:00 am and 12:00 am, respectively on a
typical weekday. The Lso noise level is described as being the noise level exceeded 90% of the time.

If the predicted road traffic noise at a residential building exceeds the noise criterion, acoustic barriers
are the initial preferred option for noise amelioration. If the predicted road traffic noise still exceeds
the noise criterion after noise barriers have been optimised, the remaining treatment option is to
incorporate noise control measures into the building design to ameliorate road traffic noise to meet
internal noise level limits in the dwellings.

Table 4.1 Recommended Design Sound Levels for Different Areas of Occupancy in Buildings
(AS2107 - 2000)

 

Location Recommended Design Sound Levels
Maximum dB(A)

 

 

 

Bedrooms 40 dB(A)
Recreational areas 45 dB(A)
Work areas 45 dB(A)

 

 

 

 

The Queensland Department of Main Roads also recommends noise level limits for parks, outdoor
educational and recreational areas. For this scenario QDMR recommend:

° The Lio (12 hour) should be equal to or less than 63 dB(A), taking into consideration the full
circumstances surrounding the provision and future use of the park or recreational area.

In addition to the Queensland Department of Main Roads (QDMR) “Road Traffic Noise
Management: Code of Practice” the Noosa Shire Council recommends that new developments
should comply with the Environmental Protection (Noise) Policy 1997. Schedule | states that:

The planning levels for a public road are the following noise levels assessed | m in front of the most
exposed part of an affected noise sensitive place —

(a) The following levels assessed as the Lio (18 hour) level -
(i) For a state-controlled road - 68 dB(A);
(ii) for another public road - 63 dB(A);

(b) 60 dB(A) assessed as the highest | hour equivalent A-weighted sound pressure
level between 10 pm and 6 am

(c) 80 dB(A) assessed as a single event maximum sound pressure level.

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4.2 Summary of Criteria

Based on the measured Lso(8hour) of 34.6 dB(A) and the measured L9o(! 8hour) of 49.8 dB(A) (see
Table 3.1), the relevant road traffic noise criteria to be met are:

© The QDMR external criteria of 57 dB(A) Lio(|8hour) free field (60 dB(A) Lio(I8hour) |
metre from the building facade);

e The QDMR nominate that the formal external open space is the private or communal
recreational area of a development “required” by local government. The noise level limit of
60 dB(A) Lio(| 8hour) free field (63 dB(A) Lio(!8hour) | metre from the building facade) will
apply to formal external open space on the subject site;

e Where the external limits are not practically achievable the design should meet the
recommended internal design levels nominated in AS2107 (and Table 4.1 of this report);

@ The QDMR nominate that the noise level limit of 63 dB(A) Lio(| 2hour) free field will apply
to parks, outdoor educational and recreational areas on the subject site;

e The Noosa Shire Council recommends that new developments be assessed under the
Environmental Protection Policy (Noise). The relevant road traffic noise criteria from the EPP
(Noise) states that proposed residential developments must achieve an Lio(18 hour) 63
dB(A) | metre from the most exposed facade of a noise sensitive place; and

e 60 dB(A) assessed as the highest | hour equivalent A-weighted sound pressure level
between 10 pm and 6 am.

Table 3.1 shows that the maximum Leq(| hour) daytime noise level is 1.4 dB(A) below the Lio(I8
hour) noise level and the maximum Leq(| hour) night time noise level is approximately 7.4 dB(A)
below the Lio(|8 hour) noise level. Therefore the Lio(|8hour) noise level goal is the most difficult
criterion to achieve. As a result if the Lio(|8hour) noise level goal of 60 dB(A) | metre from the
building facade is met for the subject site then all other noise criteria would be achieved.

The noise levels referred to in the remainder of this report include a fagade correction except where
noted.

5 Traffic Noise Model

The Queensland Department of Main Roads (QDMR) recommends that the prediction of road traffic
noise is to be conducted according to the United Kingdom Department of Transport (1988)
procedure published as “Calculation of Road Traffic Noise” (CoRTN88). The QDMR require that
predictions of road traffic noise is carried out for a ten year planning horizon at one metre from the
most exposed dwelling facade.

The traffic noise modelling was based on plans of the site supplied by PMM Group Pty Ltd, and
addresses the road traffic noise from Beckmans Road.

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The road traffic noise levels have been predicted using a computer model developed by ASK
Consulting Engineers, based on the CORTN88 traffic noise prediction method and is approved by the
Department of Main Roads.

5.1 Traffic Noise Modelling Input Data

Road traffic noise level predictions for the Lio(18 hour), maximum Leq(!| hour) daytime and maximum
Leq(| hour) night time assume a 0.5 metre source height. A 1.5 m receptor height is assumed for the
ground floor and 4.5 m for the first floor of the proposed residences, Calculations have been carried
out at allotments on the subject site at a location 6 m from the property boundary nearest to
Beckmans Road.

The receiver heights are relative to current ground levels as provided electronically by PMM Group
Pty Ltd.

The traffic noise calculations have been undertaken in accordance with CORTN88 and except where
indicated a +2.5 dB(A) facade reflection allowance is included in the road traffic noise level
predictions.

The road traffic noise level predictions are based on the traffic data provided by Main Roads and
shown in Table 5.1 below.

The road traffic noise level predictions are based on the traffic data shown in Table 5.1. The traffic
speed shown in Table 5.1 is the sign posted traffic speed adjacent to the subject site. The traffic
speed used in the noise model for the verification (year 2004) case is 80 km/h. This was the sign
posted traffic speed adjacent to noise monitoring Location A.

Table 5.1 Traffic Data

 

 

 

AADT (Vehicles) for the | Percent Heavy Vehicles | Traffic Speed km/hr for
Year for the Year the Year
Road 2004 2014 2004 2014 2004 2014
Beckmans Road 13325 27340 5 5 60 60

 

 

 

 

 

 

 

 

 

The road surface used in the noise model is worn chip seal (up to Smm). This is the existing road
surface adjacent to Location A and the subject site.

The 18 hour traffic flow may be taken to be 94% of the ultimate daily traffic flow.

A traffic growth rate of 7.5% has been used for Beckmans Road. The Department of Main Roads
supplied traffic data for the years 1996 and 2003, the traffic growth rate has been calculated based on
the traffic data obtained in these years.

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5.2 Verification of Traffic Noise Model

The results of the noise survey carried out on 27 February 2004 at Location A have been used to
verify the road traffic noise model of Beckmans Road.

The road traffic noise model uses the year 2004 traffic flows, as stated in Table 5.1 and current road
alignment to determine the Ljo(18 hour). Table 5.2 compares the results obtained from the noise
survey to the predicted results from the computer model.

Table 5.2 Existing Noise Measurements and Predictions Lio(18 Hour)

 

Measured Lio(18 hour) | Predicted Lio(18 hour)
Site Location Noise Level dB(A) Noise Level dB(A)

 

A 69.9 70.9

 

 

 

 

 

Note: Both the noise !evel measurement and predictions are free field.

The road traffic model is considered to be satisfactory validated since the predicted level is within +
2.0 dB(A) of the measured level

5.3 Prediction Methods

The CoRTN road traffic noise model predicts either the Lio (1 hour) or the Lio (18 hour),

The current measured and predicted noise levels obtained at Location A have been used to calculate
the correction in dB(A), if required, for all allotments on the subject site. Since the predicted noise
level is above the measured noise level therefore the road traffic noise model is considered to be
predicting conservatively high. Therefore no correction would need to be applied.

The predicted maximum Leg {Ihour) daytime noise level is calculated based on the difference
between the measured Lio(|8hour) noise level and the measured maximum Leq (Ihour) daytime
noise level. The appropriate correction in dB(A) is applied to the predicted Lio(| 8hour) noise /evel
based on the difference in measured noise levels. A similar process is applied to predict the maximum
Leq (Ihour) night time noise level.

The predicted Lio(| 2hour) free field noise level for the park area is typically | dB(A) below the facade
corrected L10 (18 hour) noise level based on hourly traffic distribution.

Daytime is taken to be 6am to |Opm and night time |Opm to 6am.

5.4 Traffic Noise Predictions

The traffic noise model was used to predict noise levels on the subject site. PMM Group Pty Ltd
provided the Beckmans Road alignment.

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CONSULTING ENGINEERS.

The Lio(18 hour) noise levels have been predicted for the allotments on the subject site that are most
affected by road traffic noise from Beckmans Road. The contour plots of the predicted Lio (18 hour)
noise levels are shown on the figures described below:

° Figure 3- Lio(|8hour) noise contours for the ground floor of residences with no barriers for
the year 2014; and

° Figure 4- Lio(|8hour) noise contours for the first floor of residences with no barriers for the
year 2014;

The predicted Lio(|8hour) noise levels shown on Figure 3 and 4 include +2.5 dB(A) correction for
facade reflection.

The predicted maximum Leg (hour) daytime and night time noise levels for the year 2014 are shown
in Table 5.3.

Daytime is taken to be 6am to |Opm and night time |Opm to 6am.

Table 5.3 shows the road traffic noise level predictions for low set and high set residences on the
subject site without the inclusion of nojse barriers. The predicted noise levels for allotments not
shown in Table 5.3 would be below the recommended noise level criterion of 60 dB(A) Lio(18 hour)
| metre from the building facade.

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Table 5.3 Year 2014 Predicted Noise Levels at Noise Sensitive Locations

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Receptor Floor Ground Floor First Floor
Location
Modelling Case | L10 (18 hour) | Leq (I hour) | Leg (I hour) |Lio (18 hour) | Leq(} hour) | Leq (I hour)
dB(A) Daytime Night Time dB(A) Daytime Night Time
dB(A) dB(A) dB(A) dB(A)
With Barriers No No No No No No
Lot 159 6l 59 53 6l 55
Lot 160 6l 60 54 6l 55
Lot 161 6l 59 53 6l 55
Lot 162 6) 59 53 él 55
Lot 163 63 él 55 63 57
Lot 164 62 él 55 63 57
Lot 165 62 6l 55 63 57
Lot 166 62 60 54 62 56
Lot 167 65 63 57 66 60
Lot 168 65 63 57 66 60
Lot 169 65 64 58 66 60
Lot 170 66 64 58 8 67 6l
Lot 171 66 65 59 67 6l
Lot 172 57 55 49 59 s7 Sl
Lot 173 58 S7 Si 60 59 53
Lot 174 60 58 52 él 60 54
Lot 175 60 54 64 62 56
Lot 176 60 58 52 62 60 54
Lot 177 62 60 54 64 63 57
Lot 178 65 64 58 68 66 60
Lot 179 65 64 58 69 66 60
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Receptor Floor Ground Floor First Floor
Location
Modelling Case Lio (18 hour) | Leq (1 hour) | Leq (I hour} |Lto (18 hour)| Leq(} hour} | Leq (1 hour)
dB(A) Daytime Night Time dB(A) Daytime Night Time
dB(A) dB(A) dB(A) dB(A)
With Barriers No No No No No No
Lot 180 65 64 58 68 66 60
Lot 181 64 63 s7 67 65 59
Park (902) 60 N/A N/A NIA N/A N/A
Park (901) 56 N/A N/A N/A N/A N/A

 

 

Notes:

The predicted shown in Table 5.3 are for a worn chip seal road surface.

Highlighted cells indicate an exceedence of the external L10 (18 hour) noise level criterion.

Noise levels shown in Table 5.3 include a +2.5 dB(A) correction for facade reflection.

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6 Discussion of Predicted Noise Levels

As illustrated in Figure 3, the noise level criterion of 60 dB(A) Lio (18 hour) | metre from the building
fagade would be exceeded on the ground floor of residences on allotments 159 — 171, 175 and 177
— 181 of the subject site. The external noise level limit of 60 dB(A) Lio (18 hour) | metre from the
building fagade would be met at all other ground floor residences.

As illustrated in Figure 4, the noise level criterion of 60 dB(A) Lio (18 hour) | metre from the building
facade would be exceeded on the first floor of residences on allotments 159 — 171 and 174 - 181 of
the subject site. The external noise level limit of 60 dB(A) Lio (18 hour) | metre from the building
facade would be met at all other first floor residences. The predicted Lio (18 hour) noise levels for
high set residences on all allotments assume that there are no high set residences located between
the receptor and Beckmans Road. If it is proposed to construct high set residences on allotments
between the receptor and Beckmans Road significant screening of traffic noise from Beckmans Road
would be provided to the receptor.

The noise level limit for formal external open space of 63 dB(A) Lio(|8hour) | metre from the
building facade would be exceeded at allotments 167 — 171 and allotments 178 - 181.

Noosa Shire Council has indicated that the preferred option for noise amelioration at allotments
which exceed the external noise level limit of 60 dB(A) Lio (18 hour) | metre from the building
facade is to incorporate architectural treatments into the facade of proposed buildings to comply with
the internal noise criteria in shown in Table 4.1.

The maximum predicted external Leq(| hour) noise levels are used to determine the necessary traffic
noise reduction (TNR) required from the facade nearest to Beckmans Road by subtracting the
AS2107 internal noise level goals of 45 dB(A) for living areas and 40 dB(A) for bedrooms from the
maximum predicted external Leq({| hour) daytime and night time noise levels respectively.

Table 5.3 shows that the 63 dB(A) Lio (12 hour) noise level criteria for parks and recreational areas
would be achieved in the centre of the public open space 901 and public open space 902 (see Figure
2).

7 Noise Control Measures

The 63 dB(A) Lio(! 8hour) noise level criterion for formal external open space would be exceeded at
allotments 167 — 171 and allotments 178 — 181 without the inclusion of noise barriers. These lots will
require formal external open space areas to be designed and located to reduce road traffic noise
levels. This may include the use of acoustic barriers on the allotment site, or by location of recreation
areas on the ‘quiet’ side of dwellings (ie. the facade that is shielded from road traffic noise from
Beckmans Road).

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7.1 Architectural Treatments

Noosa Shire Council has indicated that the preferred option for noise amelioration at allotments
which exceed the external noise level limit of 60 dB(A) Lio (18 hour) | metre from the building
facade is to incorporate architectural treatments into the facade of proposed buildings to comply with
the internal noise criteria in shown in Table 4.1.

The external 60 dB(A) Lio (18 hour) noise level criterion | metre from the building fagade would be
exceeded for the ground floor of residences located on allotments 159 - 171, 175 and 177 - 181
and the first floor of residences located on allotments 159 — 171 and 174 — 181. Architectural
treatments would be required to meet the internal noise level goals, from Table 4.1, at these
allotments.

The level of noise control required for the habitable rooms of the residences were assessed with
respect to Australian Standard AS3671 - 1989 ‘Acoustics - Road traffic noise intrusion - Building siting
and construction”.

The recommended internal noise level for bedrooms is 40 dB(A) and for recreational areas is 45
dB(A), as stated in AS2107-2000 entitled “Acoustics-Recommended design sound levels and
reverberation times for building interiors”. Using the methodology contained in AS 3671-1989
“Acoustics — Road traffic noise intrusion — Building siting and construction” the required Traffic Noise
Reduction TNR construction category for residences that exceed the external noise level criteria of
57 dB(A) Lto (18 hour) was determined in accordance with Section 3 of the Standard. Table 7.1
contains the TNR and construction category for residences that exceed the external noise level
criteria of 60 dB(A) Lio (18 hour} noise level criterion | metre from the building facade.

The Standard AS3671 contains the following definition for the construction categories.

Category |. Standard construction; openings including open windows and doors may comprise up to
10% of the exposed facade. TNR of approximately 10 dB(A) is expected.

Category 2. Standard construction, except for lightweight elements such as fibrous cement or metal
cladding or all-glass facades. Doors, windows and windows must be closed. TNR of approximately 25
dB(A) is expected.

Category 3. Special construction, chosen in accordance with Clause 3.4. Windows, doors and other
openings must be closed. TNR between 25 and 35 dB(A) is expected.

Category 4. TNR greater than 35 dB(A) is required; special acoustic advice should be sought.

The -maximum predicted external Leq(|hour) noise levels described in Table 5.3 are used to
determine the necessary noise reduction required from the facade nearest to Beckmans Road by
subtracting the AS2107 internal noise level goals of 45 dB(A) for living areas and 40 dB(A) for
bedrooms from the maximum predicted external Leq(|hour) daytime and night time noise levels
respectively.

The necessary noise reduction is achieved by incorporating architectural treatments with the
appropriate Rw ratings into the facade of the building. Rw is the weighted sound reduction index and
basically equivalent to the previously used STC (sound transmission class index). The calculated traffic
noise reduction (TNR) required to achieve internal noise goals for residences that exceed the
external noise level criteria of 60 dB(A) Lie (18 hour) noise level criterion | metre from the building
fagade is shown in Table 7.1.

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Table 7.1 TNR and Construction Category Calculations
Receptor Floor | Leq (Ihour) Living Areas Leq (I hour) Bedrooms
Location First Daytime Night Time
Floor of Noise Level | TNR | Construction Noise TNR | Construction
Allotment in dB(A) Category | Level in Category
dB(A)

Lot 159 Ground 59 14 2 53 13 2
Lot 160 Ground 60 IS 2 54 14 2
Lot 161 Ground 59 \4 2 53 13 2
Lot 162 Ground 59 14 2 53 13 2
Lot 163 Ground 6l 16 2 55 15 2
Lot 164 Ground él 16 2 55 15 2
Lot 165 Ground 6l 16 2 55 IS 2
Lot 166 Ground 60 IS 2 54 14 2
Lot 167 Ground 63 18 2 57 \7 2
Lot 168 Ground 63 18 2 57 \7 2
Lot 169 Ground 64 19 2 58 (8 2
Lot 170 Ground 64 19 2 58 8 2
Lot I71 Ground 65 20 2 59 19 2
Lot 175 Ground 60 IS 2 54 14 2
Lot 177 Ground 60 15 2 54 14 2
Lot 178 Ground 64 19 2 58 18 2
Lot 179 Ground 64 19 2 58 18 2
Lot 180 Ground 64 19 2 58 18 2
Lot 181 Ground 63 18 2 57 \7 2
Lot 159 First 6l 16 2 55 tS 2
Lot 160 First 6! 16 2 55 15 2
Lot 161 First 6l 16 2 55 15 2

 

 

 

 

 

 

 

 

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CONGUE INC Eom

8 Recommendations

It is recommended that the facades of ground floor residences located on allotments 159 - 171, 175
and 177 — 181 and first floor residences located on allotments 159 - 171 and 174 — 181 be provided
with architectural treatments in order to achieve the internal noise level goals in Table 4.1. A
description of the construction category required to achieve the internal noise level goals is contained
in Table 7.1. The architectural treatments required to achieve the internal noise goals should be
determined upon finalisation of the building design and layout. There are no requirements for any
other residences located on the subject site.

It is recommended that the formal external open space area of allotments 167 - 171 and 178 — [81
be designed and located to reduce road traffic noise levels. This may include the use of acoustic
barriers on the allotment site, or by location of recreation areas on the ‘quiet’ side of dwellings (ie. the
facade that is shielded from road traffic noise from Beckmans Road).

9 Conclusion

The applicable QDMR external traffic noise criterion is 60 dB(A) Lio(18 hour) | metre from the
building facade. If the external traffic noise criterion of 60 dB(A) Lio(18 hour) | metre from the
building fagade cannot be met the proposed dwelling must comply with the noise levels outlined in
Table 4.1.

The highlighted cells in Table 5.3 show where the 60 dB(A) Lto(|8 hour) road traffic noise criterion is
exceeded.

Noosa Shire Council has indicated that the preferred option for noise amelioration at allotments
which exceed the external noise level limit of 60 dB(A) Lio (18 hour) | metre from the building
facade is to incorporate architectural treatments into the facade of proposed buildings to comply with
the internal noise criteria in shown in Table 4.1. The ground floor of residences located on allotments
159 — 171, 175 and 177 — 181 and the first floor of residences located on allotments 159 — 17] and
174 — 181 would require architectural treatments to achieve the internal noise criteria in Table 4.1.

To achieve these internal noise levels at the proposed residences, the relevant facade of each
residence will be required to provide the necessary attenuation as described in Section 7.1.

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MEASURED NOISE LEVELS

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