2-20 kerr st, fitzroy - city of yarra kerr st, fitzroy ... this report relates to this particular...
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2-20 Kerr St, Fitzroy
WOOD & GRIEVE ENGINEERS
Acoustic Town Planning Report for Residential Development
Prepared for:
Prepared by:
Patrick Tobin
Tobin Developments
Thomas Lee
Project No:.35362-MEL-N \\vliGE-MEL-F5.01\PROJECTS\35362\PROJECT DOCUMENTATION \ ACOUSTICS \ REPORT \ AC-TP-003 DOC%
Date:
Level 22, 570 Bourke Street, Melbourne VIC 3000
8/09/2017
T: (03) 8554 7000 F: (03) 8554 7100 E: [email protected] W: www.wge.com.au
Revision ■
REVISION DATE COMMENT APPROVED BY
3 08/09/2017 Amendments Laura Lapena
2 07/09/2017 Updated drawings Laura Lapena
1 31/08/2017 Issued for comment Laura Lapena
REVISION 2
Contents ■
1. INTRODUCTION 1
2. PROJECT OVERVIEW 2
2.1 Project description 2
2.2 Surrounding area and sensitive receivers 5
2.3 Project background 6
2.4 Acoustic issues 7
3. NOISE SURVEY 8
3.1 Noise measurement locations 8
3.2 Attended noise survey results 8
3.3 Unattended noise survey results 9
3.4 Characterization of noise sources around the site area 10
3.5 Summary of noise levels for assessment purposed 10
4. NOISE CRITERIA 11
4.1 Environmental Noise criteria 11
4.2 Internal Noise criteria 14
5. PRELIMINARY ACOUSTIC ADVICE 16
5.1 Environmental noise emissions assessment 16
5.2 Noise intrusion assessment 16
6. CONSTRUCTION NOISE REQUIREMENTS 18
6.1 Construction and demolition site noise 18
7. CONCLUSION 19
APPENDIX 1: GLOSSARY OF ACOUSTIC TERMS 20
APPENDIX 2: UNATTENDED LOGGER RESULTS 22
CONTENTS I i 1 \ WGE-MEL-FS-01 \ PROJECTS \ 35362 \ PROJECT DOCUMENTATION \ACOUSTICS \REPORT \ AC-TP-003.DOCX
Introduction
1. Introduction
Wood & Grieve Engineers (WGE) have been engaged by Tobin Developments to assess the environmental noise impacts
for the proposed residential development sited at 2-20 Kerr Street, Fitzroy.
This acoustic report discusses potential environmental noise impacts of the proposed development on surrounding
sensitive receivers, including:
• Noise emissions from the development (e.g. mechanical plant noise), and
• Noise intrusion upon the proposed development based on traffic, trams and noise from local commercial
enterprises.
• Noise from motor vehicle repair on Spring St, and noise from car wash on Nicholson Street
This report also provides advice to the potential construction noise control requirements for the construction phase of
the project.
This report has been prepared considering the following documents:
• City of Yarra Planning Scheme.
• State Environment Protection Policy (SEPP Control of Noise from Industry, Commerce and Trade) No. N-1.
• Relevant Australian Standards and Guidelines.
• Point 14 in City of Yarra planning application PLN17/0379 request for information (RFI) letter.
The report provides:
• The VIC EPA's SEPP N-1 criteria for the mechanical plant associated with the proposed residential development
at nearest potentially affected residential receivers.
• Internal noise level criteria for transportation noise.
• Noise and vibration level criteria for construction noise and relevant general recommendations.
• Recommendations when noise levels are predicted to exceed the applicable noise criteria.
The acoustic assessment contained in this report is based on a noise survey that was conducted during August 2017.
This report is based on our understanding of the proposed project, application of the relevant standards and guidelines
and professional experience within the acoustic field.
This report relates to this particular project and must not be applied to any other project without consultation with
WGE. Project designs and conditions can vary between projects causing significant variations in acoustic performance
and relevant subsequent advice to one project may not apply to another.
This report shall not be relied upon as providing any warranties or guarantees of construction quality with regard to
acoustics.
INTRODUCTION 11
Project Overview
2. Project Overview
2.1 Project description
The proposed development presents 18 townhouses within a 3-4-storey building, approximately 11.3 metres in height.
It contains a common parking area on the ground floor, and a driveway for storing cars within a 2-level car stacker
(ground floor and basement). Areas within each level of the proposal are as follows:
• Ground Level:
Bedrooms
Bathrooms
Driveway and car stacker
Bike lockers and storage areas.
• Level 1:
Bedrooms
Bathrooms
Terraces
Living/dining rooms/kitchen
Communal courtyard
• Level 2:
Bedrooms
Bathrooms
Terraces
Studies
Living/dining rooms/kitchen
• Level 3:
Bedrooms
Rooftop Terrace
Roof
PROJECT OVERVIEW 12 \\ WGE •MEL-FS-01 \PROJECTS \35362 \PROJECT 000uMENTATiON \ACOUSTICS \REPORT \AC•TP-003.00CX
Figure 1 Layout of the proposed redevelopment —Ground level
1
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1
Project Overview
Figures 1 to 5 below show an overview of the planned layout for the proposed development.
Source: DesignOffice
Figure 2 Layout of the proposed redevelopment — Level 1
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Source: DesignOffice
PROJECT OVERVIEW 1 3 FS 1,1,PROIL(IS \ 3531,2 \PROJECT DOCUMENTar■OW4C;u:ST, CS \REPORT \AC rP u)cr,
-1
4
Project Overview
Figure 3 Layout of the proposed redevelopment — Level 2
Source: DesignOffice
Figure 4 Layout of the proposed redevelopment — Level 3
Source: DesignOffice
PROJECT OVERVIEW 14 \\WGE-MEL-FS-01 \PROJECTS \ 35362 \PROJECT DOCUMENTATION \ACOUSTICS \REPORT \AC-TP-003.00C%
1■111111Ma
Project Overview
Figure 5 Layout of the proposed redevelopment — Roof.
_
It.
Source: DesignOffice
2.2 Surrounding area and sensitive receivers
The proposed development is to be located at 2-20 Kerr Street, Fitzroy. Figure 6 below presents the site and surrounds
of the proposed development.
A mix of residential receivers and commercial premises surround the site as shown in Figure 6. The site is bounded by:
• Laneway and residential developments to the south.
• Kerr Street to the north.
• Laneway and commercial development to the west.
• Spring Street and motor vehicle repair shop to the east.
PROJECT OVERVIEW 15
Project site
F-1 Residential receivers
Commercial receivers
Attended measurement
Unattended measurement
Project Overview
Figure 6: Aerial photo of the area showing an overview of the site, measurement locations and surrounding areas.
Source: Nearmaps/WGE
As Figure 6 above shows, the nearest sensitive receiver to the proposed development is 19 Henry Street to the south of
the development.
Traffic on Kerr Street includes light (cars and motorcycles) and heavy vehicles. A tram line runs along Nicholson Street,
and Nicholson Street also experiences heavy traffic during peak times. Other additional sources of noise include the
auto repair shop to the south east of the site on 28-32 Spring Street, as well as the car wash to the south west of the
site in 266 Nicholson Street.
During the site inspections it was observed that the loudest traffic sources included traffic noise and trams along
Nicholson Street. Two site visits were made in total where attended noise measurements were conducted. WGE was
able to record noise from commercial activities in the auto repair workshop and car wash as presented in Table 1 in Section 3.2.
2.3 Project background
As per City of Yarra planning application PLN17/0379 RFI, the council requests information pursuant to section 54 of the
Planning and Environment Act 1987, which includes:
1. An acoustic report assessing how the townhouses will be protected from noise of the motor vehicle repair on Spring Street/Car was on Nicholson Street, and any recommendations to limit noise impacts in accordance with SEPP N-1.
PROJECT OVERVIEW 16 \ \ WGE-MEL-FS-01 \PROJECTS \35362 \PROJECT DOCUMENTATION \ACOUSTICS \REPORT \AC•TP•003.1)0C%
Project Overview
2.4 Acoustic issues
2.4.1 Environmental noise emissions from the development
It is expected that the main sources of noise emissions from the development are noise emissions from mechanical
plant associated with the development, which may operate 24/7.
The noise limits to comply with the EPA regulations in regards to residential mechanical plant is presented in Section
4.1.1 and 4.1.2.
Car stacker
We understand that car stacker is to be installed on site. The noise limits to comply with the EPA regulations SEPP N-1
(control of mechanical noise) is presented in Section 4.1.3.
2.4.2 Noise intrusion upon the development
It is expected that the main source of noise intrusion upon the proposed development is traffic noise from Kerr and
Nicholson Street and from nearby commercial activity. Internal noise criteria for the development has been presented
in Section 4.2.
Assessments of transportation noise with preliminary recommendations for the building envelope are presented in
Section 5.1.
Car wash and car repair shop
WGE understands that there is potential to cause noise intrusion into the development from nearby commercial
activity, this includes the adjacent car washer and auto repair shop. During the site visits, a number of attended
measurements took place, and are presented in Section 3.1. These measured results were factored into the noise
intrusion values used in section 5.1.
PROJECT OVERVIEW 17
Noise Survey
3. Noise Survey
An environmental background noise survey was conducted at the site as per VIC EPA Guidelines. WGE undertook
attended noise measurements in the day, evening and night periods in accordance with the SEPP N-1.
The noise survey was undertaken to characterise the noise environment around the site and provide acoustic
recommendations for the amenity inside future townhouses. The following equipment was used for the noise surveys:
• B&K Sound Level Meter Model 2250, S/N 3008515
• Sound Calibrator, Pulsar Model 105, S/N 72910
• Ngara Noise Logger S/N 87819c
All equipment was calibrated before and after the measurements and no significant drift was found. All equipment
carries current traceable calibration certificates that can be provided upon request. The weather conditions during the
noise surveys were generally dry with a light breeze. Data affected by weather has been excluded from the calculations
and highlighted in grey in the logger data graph in Appendix 2.
3.1 Noise measurement locations
Attended noise measurements were conducted on-site on the 25' & 29' of August 2017. These measurements are
used to determine the existing ambient and background noise levels representative for the proposed development and
surrounding sensitive receivers.
Figure 6 in Section 2.2 presents the noise testing locations. These testing locations correspond to:
P1 Corner of Kerr and Nicholson Street.
P2 Front of Car wash, in Henry Street.
P3 Along Peel Street, adjacent to auto repair shop.
P4 Laneway behind development.
P5 Peel street, adjacent to auto repair shop (second measurement).
P6 Front of car wash in Henry Street (second measurement).
P7 Front of development along Kerr Street
Ll Ngara Noise Logger: laneway in between Kerr Street and Nicholson Street
3.2 Attended noise survey results
Attended noise measurements around the site were conducted to characterise the noise environment surrounding the
proposed development.
Table 1 presents the maximum, ambient, background noise levels observed onsite.
NOISE SURVEY 18 \WGE-MEL-FS-01 \PROJECTS \ 35362 \PROJECT DOCUMENTATION \ACOUSTICS \REPORT \AC-TP-003.000(
Average Background Noise Level
LA90,1hr dB(A)
Evening Night
48
47
42
Noise Survey
Table 1 Observed maximum (LAmax), ambient (LAeq, LAID) and background (LA90) noise levels
Location Date and time Duration
mm:ss
15:02
Lmax Maximum
noise levels dB(A)
91
lm Noise Level dB(A)
73
Ambient Noise Level LAeq,t dB(A)
71
Backgroun d Noise
Level LA90 dB(A)
62
Notes
Moderate traffic noise noted along
with tram noise. 25/08/2017
10:43
25/08/2017 10:59
15:05 76 64 62 55
Some traffic noise noted from
Nicholson Street, audible machine
noise from car wash.
25/08/2017 11:16
05:04 69 58 55 47
Minimal traffic noise along Peel
Street, minimal noise from auto
repair shop.
25/08/2017 11:22
02:10 62 51 50 48 Little to no audible traffic noise
noted in laneway.
29/08/2017 13:08
12:16 73 59 56 46
Minimal traffic noise along Peel
Street. Managed to capture
machine noise from auto repair
shop.
29/08/2017
13:25 03:06 66 59 56 49
Moderate traffic noise audible
from Nicholson Street, audible
machine noise from car wash.
29/08/2017
13:31 01:02 59 57 54 50
Moderate traffic noise noted
along Kerr Street.
From the onsite observations the noise levels were most noticeable within a closer vicinity to Nicholson Street.
3.3 Unattended noise survey results
Long-term unattended measurements have been conducted at a location adjacent to the future site boundary to
determine the existing ambient and background noise levels representative of the site and surrounding sensitive
receivers at different times of the day and night periods.
Unattended long-term noise measurements were conducted with an Ngara noise logger on-site continuously over a
five-day period, between the 25th to 29th of August 2017.
The noise logger was placed at position Ll as shown in Figure 6. Results of the noise survey are shown in Table 2 and in
the graphs in Appendix 2.
Table 2 Summary of unattended long-term ambient (Max I —eq,lhr), and background II. noise levels at Location L1
Location
Maximum Continuous Ambient Noise Level
Max LA eciAtir dB(A)
Day Evening Night
L1— Facade facing Sturt Street 65 64 62
NOISE SURVEY 19 V■VVGE MEL FS-01\ PROJECTS 05362 \PROJECT DOCuMENTAtiON \ ACMSTILS \REPOkt \AC•TP•003 UOCx
Noise Survey
3.4 Characterization of noise sources around the site area
Traffic along Kerr includes light (cars and motorcycles) and heavy vehicles. A tramline runs along Nicholson Street,
which experiences heavy traffic during peak times. During the site inspections it was observed that there was a minimal
noise impact from surrounding commercial developments, including the car wash and auto repair shop. It is worth
noting that the proposed development will be partly shielded from noise coming from the car wash by surrounding
existing buildings, and in addition to this, the noise from the auto repair shop can be described as infrequent and
intermittent (based on WGE noise surveys and site observations).
3.5 Summary of noise levels
A combination of attended and unattended measurements have been taken on site. It was found that a level of 60
dBLAeq,16hrs was detected during the day periods and 54 dBLAeq,8hrs was found for the night periods, these noise values will
be used in conjunction with the criteria set out in the BADS guidelines (Section 4.2.1).
For purposes of determining ambient background noise levels for SEPP N1 assessment, the NGARA noise logger results
presented in Table 2 should be used as those are the more representative of current background noise levels around
the subject site.
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Noise Criteria
4. Noise Criteria The following documents are supporting the design criteria applicable for the Kerr Street development:
• Environmental noise emissions (from mechanical plant associated with residential components)
Environment Protection (EP) Act 1970 – Section 48A
EPA's Victoria Publication 1254 – Noise Control Guidelines (October 2008).
State Environment Protection Policy (Control of Noise from Industry, Commerce and Trade) No. N-1
(SEPP N-1).
• Internal noise levels (from external noise intrusion)
AS/NZS 2107:2016: "Acoustics – recommended design sound levels and reverberation times for
building interiors".
Victorian Better Apartments Design Standards.
4.1 Environmental Noise criteria
EP Act 1970 Section 48A — Unreasonable noise from residential premises
Section 48A of the EP Act 1970 states that a person who emits or causes or suffers to be emitted unreasonable noise
from any residential premises is guilty of an offence.
The EP Act describes unreasonable noise as follows:
(4) ...noise is to be taken to be unreasonable if it is unreasonable having regard to —
(a) its volume, intensity or duration; and
(b) the time, place and other circumstances in which it is emitted.
(5) ... any noise from a prescribed item which —
(a) is emitted from residential premises at any time which is prescribed as a prohibited time in respect of that prescribed item; and
(b) can be heard in a habitable room in any other residential premises, regardless of whether any door
or window giving access to that room is open is deemed to be unreasonable noise unless it is emitted in the case of an emergency"
In regards to the above, 'Habitable room' means any room other than a kitchen, storage area, bathroom, laundry, toilet
or pantry. Further to that, noise is deemed not to be unreasonable if it is emitted in the case of an emergency.
EPA Publication 1254 Section 1 — Fixed domestic plant
The EPA Publication 1254 Section 1 states that noise from fixed domestic plant is subject to Section 48A of the
Environment Protection Act 1970 and the Environment Protection (Residential Noise) Regulations 2008.
Further to that, it gives restrictions of operations during prohibited and non-prohibited times as indicated below. The
following prohibited hours apply to air conditioners, swimming pool and spa pumps, ducted heating systems and the
like:
• 10 pm — 7 am Monday—Friday.
• 10 pm — 9 am weekends & public holidays.
NOISE CRITERIA I 11
Noise Criteria
Day/evening operation (non-prohibited times)
EPA Publication 1254 Section 1 states that noise levels not meeting this guideline may be considered unreasonable if
they interfere with use of home or property on a recurring or ongoing basis. Where noise from any fixed domestic plant
is audible beyond the boundary of the residential premises on which the plant is situated, the intrusive noise shall not
exceed the background noise level by more than 5 dB at the measurement position. Adjustment for tonality and/or
impulsiveness must be included if applicable. Assess at a time and circumstance representative of the likely worst case of impact, considering:
• When equipment is likely to be operating.
• The equipment settings representative of normal operation.
• That multiple items that generally operate together be assessed together.
• Representative background noise levels — noise from domestic plant will be more intrusive when background
levels are lower (i.e evening).
Night operation (prohibited times)
Noise from any fixed domestic plant must not be audible within a habitable room of any other residence (regardless of
whether any door or window giving access to the room is open) during prohibited hours prescribed by the Environment
Protection (Residential Noise) Regulations 2008.
4.1.3 SEPP N-1 environmental noise emission
The Victoria State Environment Protection Policy No. N-1 (SEPP N-1), prescribes procedures for determining the
statutory environmental noise limits which apply at noise sensitive locations, such as residential areas, with respect to
commercial, industrial and trade operations. We have applied the general basis of this policy in our report to external
mechanical plant associated with the proposed development. The time periods are defined by SEPP N-1 as per Table 3.
Table 3 SEPP N-1 applicable time periods for noise limits selection
Time Period for Noise Limits Selection 111•1111111111P
07.00 am to 18.00 pm Monday to Friday
07.00 am to 13.00 pm Saturdays Daytime Noise Limits
Evening Noise Limits
Night Noise Limits
18.00 pm to 22.00 pm all days
13.00 pm to 18.00 pm Saturdays
07.00 am to 18.00 pm Sundays and Public Holidays
22.00 pm to 07.00 am all days
For this project, the limits of permissible noise at and around the subject site are outlined in
Table 4 below. The noise limits have been obtained in accordance with SEPP N-1 Schedule B and are calculated taking
into account the following factors:
• The time of day (day, evening or night).
• The proportions of land use for residential, industrial and commercial use in the immediate adjacent area,
shown in Figure 7.
• The zoning levels (ZL's) determined in accordance with SEPP N -1 Schedule B2.
• The background noise levels in the area, as presented in Section 3.3.
NOISE CRITERIA 112 \ \ WGE•MEL-FS•01 \PROJECTS \ 35362 \PROJECT DOCUMENTATION \ ACOUSTICS \REPORT \ AC-TP•003.00CX
Surrounding;
residences
Noise Criteria
Table 4 Permissible noise limits at nearest sensitive receivers as per SEPP N-1
Location Period
Day
Zoning Level
59
Background noise
LA907
48
Background category Noise limit
LAeiff
59 Nearest residents
Neutral
Evening 52 47 Neutral 52
Night 47 42 Neutral 47
F-Igure 7 Zoning Area
4.1.4 Summary of noise criteria
For the purpose of the environmental noise emissions assessment from external mechanical plant, the noise criteria in
Table 5 apply to this project.
Table 5 Summary of noise criteria for residential and commercial plant at nearest sensitive receivers
Location
Period Noise criteria
Subject Plant
Day 48 dBLAso,putod2 + 5 = 53 di3meth r
Evening 47 dBLA90,perlod2 + 5= 52 dBlArq.T
Night Inaudible inside adjacent residential (windows open)
Day 59 dBiAeq,T
Plant associated to car stacker
component of development'
Night 47 dBbleg,T
Notes: 1. In accordance with EPA's Victoria Publication 1254 under the EP Act 1970 —Section 48A requirements.
2. Representative background noise levels around the site for the Day and Evening periods are extracted from Table 2.
3. In accordance with SEPP N-1, noise limits are extracted from Table 4.
NOISE CRITERIA 11.3
Plant associated to RESIDENTIAL
component of development'
Evening 52 di3LAeg,T
Noise Criteria
4.2 Internal Noise criteria
4.2.1 Better Apartments Design Criteria
As of March 2017, the Victorian planning provisions and all planning schemes will be amended to include the Better
Apartments Design Standards (BADS) to be applied to all apartment developments in Victoria. Whilst not technically
applicable for this project, the BADS criteria is presented for information purposes only.
With regards to noise impacts, the BADS objectives are:
• To contain noise sources in the development that may affect existing dwellings, and
• To protect residents from external and internal noise sources.
A building within a noise influence area specified in Table 6 should be designed and constructed to achieve the
following noise levels:
• Not greater than 35 dB(A) for bedrooms, assessed as an LAeq,8h from 10pm to 6am.
• Not greater than 40 dB(A) for living areas, assessed LAeq,16h from 6am to 10pm.
Table 6 BADS noise influence area
Noise Source
Zone interface
Industrial zone 1, 2 & 3
Noise Influence Area
300m to the zone boundary
Road
Freeways and tollways
Other roads
300m
300m and carrying 40,000 Annual Average Daily Traffic Volume
Railway
Railway servicing passengers in Victoria
Railway servicing freight in non-metro Melbourne
Railway servicing freight in metropolitan Melbourne
80m
80m
135m
4.2.2 AS2107 design sound levels
Internal noise levels for the project are subject to the guidelines outlined in Australian Standard AS2107-2016:
Recommended design sound levels and reverberation times for building interiors. This includes control of intrusive noise
through the building envelope in addition to the design of internal mechanical services to achieve the recommended
interior levels.
Table 7 below shows the recommended internal noise levels for various spaces within the project.
Table 7 AS 2107-2016 recommended sound design levels
Recommended design sound level, Leq dB(A) Type of occupancy/activity
Satisfactory Maximum
114
7. Residential buildings (in inner city areas or near major roads)'
Apartment common areas (foyer, lift, lobby) 45
35
35
< 65
50
45
40
NOISE CRITERIA
Living areas
Sleeping areas (night time)
Enclosed carparks
Note: 1. Development is located near Nicholson Street which is a major road.
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Noise Criteria
4.2.3 Summary of internal noise criteria
For the purpose of the internal noise levels assessment, facade glazing for living rooms and bedrooms will be designed to achieve the criteria set out in the Better Apartments Design Standards, with AS2107 guidelines applicable in all other relevant areas. We note this is consistent with City of Yarra planning scheme.
NOISE CRITERIA 115
Preliminary Acoustic Advice
5. Preliminary Acoustic Advice
5.1 Environmental noise emissions assessment
The criteria for external mechanical plant presented in Sections 4.1.1 and 4.1.2 is applicable to future mechanical plant
associated with the proposed mixed use development, such as air conditioning plant, exhaust fans, refrigeration plant, etc.
It is understood that the mechanical services design allows for a roof plant area where condenser units and other plant are to be located.
At this early stage, preliminary selections for mechanical plant are not available. However, it is noted that the noise
limits are expected to be met at most-affected surrounding residential receivers if residential-grade plant is installed. In
cases where limits are anticipated to be exceeded, the situation could be addressed with the use of standard noise
controls such as, but not limited to:
• Strategic location of new plant and equipment.
• Noise barriers or screens around plant areas.
• Selection of quieter plant.
• Installation of attenuators and / or acoustic louvres.
Notwithstanding the above, it is recommended that an Acoustic Consultant reviews the noise emissions of external
mechanical plant final selections to ensure compliance with Section 48 of the Environment Protection Act 1970 and
EPA's SEPP N-1 requirements for residential and commercial plant, respectively.
Model and acoustic data from the manufacturer is required in order to provide a reliable assessment of its
performance. Therefore, it is recommended that a detailed vibration assessment of the specific car stacker
manufacturer is conducted during the detail design stage of the project once information about the car stacker provider is made available to confirm compliance with SEPP N-1 is presented in Section 4,1.3. However, it is expected that car
stacker plant is installed in an enclosed plantroom within the development and, as such, noise impacts are anticipated to be minimal.
5.2 Noise intrusion assessment
Note that all recommendations in this sections are based on acoustic requirements only, structural, thermal and other
considerations should be accounted for when providing the for construction documentation.
5.2.1 Existing commercial activities around the site
As requested by Council, a detailed noise survey has been conducted to quantify the noise impact of existing
commercial activities around the site (namely, the car wash in Nicholson Street and the auto repair workshop on Spring Street).
Based on the attended measurement results presented in Table 1 in Section 3.2 at locations P2 and P6 (for the car wash
noise) and P3 and P5 (for the workshop noise) and considering the site location, distance attenuation and shielding from
intervening structures, noise levels from existing commercial activities at the facade of the future proposed
development have been found to be below the 59dBLAeq,ismin SEPP N-1 noise limit during the daytime, when the commercial units are anticipated to operate.
Therefore, no further noise mitigation measures are recommended further to the building envelope recommendations
in Sections 5.2.2, 5.2.3 and 5.2.4 to comply with BADS internal noise limits.
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Preliminary Acoustic Advice
5.2.2 Facade glazing
It is expected that the major noise sources affecting the project will be local traffic noise and building services
associated with the existing development and, to a lesser extent, noise from commercial activities in the surrounding
area.
LAeq values gathered during the day and night time period according to the BADS guidelines (refer to Sections 3.5 and
4.2.1 respectively) will be used as the noise intrusion levels and design criteria.
In order to satisfy the criteria set out in Section 4.1 the following glazing schedule is recommended to all the external
facades of the development:
• 6mm float glass /12mm air cavity/ 6mm float glass for all external glazing (all facades).
5.2.3 Facade
The facade to the development shall typically achieve a minimum Rw rating of 50 for masonry walls such as 150mm
thick concrete (350kg/m2) or an equivalent light weight configuration.
5.2.4 Roof slab
The upper level roof/slab shall be designed to achieve a minimum Rw rating of 50, such as 150mm thick concrete
(350kg/m2 ).
PRELIMINARY ACOUSTIC ADVICE 117
Construction Noise Requirements
6. Construction Noise Requirements
Construction and/or demolition works associated to the proposed development must comply with the requirements
specified in the EPA Noise Control Guidelines Publication 1254, October 2008.
The sections below describe the standard working hours plus out-of-hours recommended noise limits applicable to the Project.
6.1 Construction and demolition site noise
6.1.1 Normal working hours
Construction Noise to follow the requirements above during the hours of:
• 7 am — 6 pm Monday to Friday
• 7 am — 1 pm Saturdays
6.1.2 Weekend/evening work hours Noise level at any residential premises not to exceed background noise by:
10 dB(A) or more for up to 18 months after project commencement • 5 dB(A) or more after 18 months during the hours of:
6am - 10pm Monday to Friday
1pm - 10pm Saturdays
7am - lOpm Sundays and public holidays
6.1.3 Night period
Noise inaudible within a habitable room of any residential premises during the hours of:
• 10 pm — 7am Monday to Sunday
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Conclusion
7. Conclusion
An acoustic assessment for the proposed residential development at 2-20 Kerr Street has been conducted. This
document forms part of the documentation package to be submitted to local authorities as part of the town planning
process. This report has provided criteria and in-principle design requirements which aim to achieve the proposed
statutory criteria.
The establishment of the environmental noise criteria is based on the noise survey results presented in Section 3.
Background and ambient noise levels were obtained using attended and unattended noise measurements.
Glazing for the buildings residential areas has been designed to achieve internal noise levels in accordance with the
requirements of the maximum internal noise levels from the Better Apartments Design Standards (Section 4.2.1). The
building envelope preliminary recommendations, including glazing, are presented in section 5.2. This glazing has been
selected based on the noise survey results, which accounted for all the noise sources in the site surroundings including
the existing auto repair workshop along Spring Street and Car Wash on Nicholson Street. We are of the opinion that if
the performance specification set for the glazing and the façade are implemented, the internal noise levels will be
complying with the Better Apartment Design Guidelines.
The permissible SEPP N1 noise limits for residential plant and the car stacker are presented in Section 4.1. Preliminary
recommendations for noise controls for external plant are summarised in Section 5.1.
Noise and vibration level criteria for construction noise and relevant general recommendations are presented in Section
6.
The information presented in this report shall be reviewed during the detailed design stage of the Project when more
detailed information in regards to mechanical plant and building envelope construction are made available to WGE.
CONCLUSION 119
Ambient Noise:
Assessment Period:
Assessment Location
Background Noise:
Decibel [dB]:
dB(A):
Extraneous Noise:
Free Field:
Frequency:
Appendix 1: Glossary of Acoustic Terms
Appendix 1: Glossary of Acoustic Terms
NOISE
The acceptable LAeq noise level from industrial sources, recommended by the
EPA (Table 2.1, INP). Note that this noise level refers to all industrial sources at
the receiver location, and not only noise due to a specific project under
consideration.
Acceptable Noise Level:
Adverse Weather: Weather conditions that affect noise (wind and temperature inversions)
that occur at a particular site for a significant period of time. The
previous conditions are for wind occurring more than 30% of the time in
any assessment period in any season and/or for temperature inversions
occurring more than 30% of the nights in winter).
Acoustic Barrier: Solid walls or partitions, solid fences, earth mounds, earth berms, buildings, etc.
used to reduce noise.
The all-encompassing noise associated within a given environment at a given
time, usually composed of sound from all sources near and far.
The period in a day over which assessments are made.
The position at which noise measurements are undertaken or estimated.
Background noise is the term used to describe the underlying level of noise
present in the ambient noise, measured in the absence of the noise under
investigation, when extraneous noise is removed. It is described as the average of
the minimum noise levels measured on a sound level meter and is measured
statistically as the A-weighted noise level exceeded for ninety percent of a sample
period. This is represented as the L90 noise level.
The units of sound pressure level.
A-weighted decibels. Noise measured using the A filter.
Noise resulting from activities that are not typical of the area. Atypical activities
include construction, and traffic generated by holidays period and by special
events such as concert or sporting events. Normal daily traffic is not considered to
be extraneous.
An environment in which there are no acoustic reflective surfaces. Free field
noise measurements are carried out outdoors at least 3.5m from any acoustic
reflecting structures other than the ground
Frequency is synonymous to pitch. Frequency or pitch can be measured on a scale
in units of Hertz (Hz).
APPENDIX 1: GLOSSARY OF ACOUSTIC TERMS 120 \\ WGE-MEL-FS•01 \PROJECTS \ 35362 \PROJECT DOCUMENTATION \ACOUSTICS \REPORT \AC-TP-003.DOCX
Appendix 1: Glossary of Acoustic Terms
Impulsive Noise:
Noise having a high peak of short duration or a sequence of such peaks. A
sequence of impulses in rapid succession is termed repetitive impulsive noise.
Intermittent Noise:
Level that drops to the background noise level several times during the period of
observation.
LAmax The maximum A-weighted sound pressure level measured over a period.
LAmin
The minimum A-weighted sound pressure level measured over a period.
LA1
The A-weighted sound pressure level that is exceeded for 1% of the time for
which the sound is measured.
LA10
The A-weighted sound pressure level that is exceeded for 10% of the time for
which the sound is measured.
LA90
The A-weighted level of noise exceeded for 90% of the time. The bottom 10% of
the sample is the L90 noise level expressed in units of dB(A).
LAeq
The A-weighted "equivalent noise level" is the summation of noise events and
integrated over a selected period of time.
LAeqT
The constant A-weighted sound which has the same energy as the fluctuating
sound of the traffic, averaged over time T.
Sound wave changed in direction of propagation due to a solid object met on its
path.
Reflection:
R-w:
The Sound Insulation Rating R-w is a measure of the noise reduction performance
of the partition.
SEL:
Sound Exposure Level is the constant sound level which, if maintained for
a period of 1 second would have the same acoustic energy as the
measured noise event. SEL noise measurements are useful as they can be
converted to obtain Leq sound levels over any period of time and can be
used for predicting noise at various locations.
Sound Absorption:
The ability of a material to absorb sound energy through its conversion into
thermal energy.
Sound Level Meter:
An instrument consisting of a microphone, amplifier and indicating device, having
a declared performance and designed to measure sound pressure levels.
Sound Pressure Level:
The level of noise, usually expressed in decibels, as measured by a standard sound
level meter with a microphone.
Sound Power Level:
Ten times the logarithm to the base 10 of the ratio of the sound power of the
source to the reference sound power.
Tonal noise:
Containing a prominent frequency and characterised by a definite pitch.
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