Vital Experience - Blacktown City Council

Transcription

223 & 225 Grange Avenue and 999 Richmond Road,
Marsden Park NSW
Acoustic Report
Development Application
Prepared for:
Prepared by:
Australian Development
Investments Holdings Pty Ltd
c/- Angus Harker
ROTHELOWMAN
Sean Matthews
Project No. 28505-SYD-N
Date:
23/02/2016
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Revision
REVISION
03
02
01
DATE
23/02/16
17/12/15
20/11/15
COMMENT
Revised drawings
Revised drawings
Draft Issue
APPROVED BY
Mathew McGrory
Mathew McGrory
Mathew McGrory
WGE is a proud member of the Association of Australian Acoustical Consultants (AAAC).
AAAC members are competent and capable in the acoustic field. Members of the AAAC provide professional unbiased
advices and recommendations in order to deliver practical innovative and cost effective solutions to their clients.
AAAC members are bind to a specific code of professional conduct which can be consulted on the AAAC
website: http://www.aaac.org.au/au/aaac/ethics.aspx
REVISION
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Contents
1.
INTRODUCTION
1
2.
BACKGROUND
2
2.1
Information Sources
2
3.
PROJECT OVERVIEW
3
3.1
Site description
3
3.2
Acoustic Issues
3
4.
NOISE SURVEY
4
4.1
Instrumentation
4
4.2
Attended Noise Survey Results
4
4.3
Unattended Noise Survey Results
4
5.
CRITERIA
7
5.1
Internal Noise Levels
7
5.2
Site Noise Emission
9
5.3
Traffic Noise Generation Criteria
11
5.4
Construction Noise Criteria
12
5.5
Construction Vibration Criteria
13
6.
NOISE IMPACT ASSESSMENT
15
6.1
External Glazing
15
6.2
Open Windows Scenario
16
6.3
Mechanical Services Noise Emissions
16
6.4
Delivery and Waste Truck Noise
18
6.5
Road Traffic Noise Impact Assessment
19
7.
CONCLUSION
20
APPENDIX 1 - GLOSSARY OF ACOUSTIC TERMS
21
APPENDIX 2 – GLAZING MARK-UPS AND OPEN WINDOWS
23
CONTENTS | i
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Introduction
1.
Introduction
As part of the DA documentation process, Wood & Grieve Engineers have been engaged by RotheLowman to provide an
acoustic assessment for the proposed mixed-use development located at 223 & 225 Grange Avenue and 999 Richmond
Rd, Marsden Park.
The proposed development will consist of:
 8 blocks of residential apartments over four stages
 2 to 4 levels of basement car parking
 Ground level consisting of commercial units and retail spaces
 Ground and upper ground to level 7 consisting of residential apartments
This assessment discusses the likely noise impact from the development on the potentially nearest most-affected
receivers of the development.
This assessment has been prepared considering the following documents:
 Blacktown Development Control Plan (DCP) 2010
 Blacktown City Council (BCC) Growth Centre Development Control Plan (DCP)
 Department of Planning (DoP) – Development near Rail Corridors and Buys Roads – Interim Guideline
 State Environmental Planning Policy (Infrastructure) 2007
 AS/NZS 2107:2000 – Acoustics – Recommended Design Sound Levels and Reverberation Times for Building
Interiors
This report provides:
 A statement of compliance with the Blacktown City Council requirements for the proposed mixed-use
development within the vicinity of the nearest potentially affected residential receivers.
 Recommendations for noise mitigation measures for the proposed development in order to meet the relevant
criteria when compliance is not achieved.
This noise assessment is based on noise data collected by a combination of unattended and attended noise
measurements at representative locations around the site over 11 days during October and November 2015.
This report is based on our understanding of the proposed project, application of the relevant state guidelines and
professional experience within the acoustic field.
INTRODUCTION | 1
Background
2.
Background
2.1 Information Sources
The following documentation has been used for the preparation of this report:
 Arup Report “Richmond Road – Construction and Operation Noise Assessment, Document ref AAc/22023200/R01, Rev C”
 Site drawings presenting the location of the proposed development in relation to the nearest receivers
 Noise data collected on site through the use of noise loggers and a hand held spectrum analyser
 Traffic report from GTA consultants, issue A-Dr2, dated 22/02/16
 Architectural drawings provided by RotheLowman, which include:
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BACKGROUND | 2
Project Overview
3.
Project Overview
3.1 Site description
The proposed site is located at 223 & 225 Grange Avenue and 999 Richmond Road, Marsden Park, and is bound by
Richmond Road to the West, Grange Avenue to the North, and residential properties to the South and East. The
surrounding residential properties are currently single dwellings with agricultural land in some cases. The nearest
residential receiver is the property directly on the east boundary of the site. The assessment has considered the future
residential developments surrounding the site as part of a master plan, which will be located at close proximity to the
development site boundary on the east and south. It should be noted that the acoustic assessments are conducted at or
within the property boundary.
In addition, there are also major road works being conducted to Richmond Road. As such, the future scenarios in
regards to vehicle movements have been considered based on Arup’s Construction and Operation Noise Assessment
report.
The site location, measurement positions and surrounding residential and commercial receivers are shown in Figure 1.
3.2 Acoustic Issues
The acoustic issues relating to the development are as follows:
 Noise intrusion from vehicle movements along Richmond Road and Grange Avenue
 Noise emissions from typical mechanical plant from the development to the surrounding receivers
 Increase in traffic noise generation on Grange Avenue from the proposed development
Figure 1: Overview of the site and measurement locations
Source: nearmap.com
PROJECT OVERVIEW | 3
Noise Survey
4.
Noise Survey
4.1 Instrumentation
The following equipment was used for the noise surveys:
 ARL Environmental Noise Logger ARL EL-215 S/N 194639
 Hand-held sound spectrum analyzer B&K 2250, S/N 2709742
 Sound Calibrator B&K Type 4231, S/N 2709826
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.
4.2 Attended Noise Survey Results
Attended noise measurements of 15-minute duration were conducted on site to characterise the acoustic environment
for noise intrusion into the development, and to determine any noise impact on the surrounding receivers. A summary
of the attended noise measurements taken at site are shown in Table 1. Refer to Figure 1 for measurement locations.
Table 1: Attended noise measurements
Measurement
Location
Measurement Time
LAeq, 15mins
dB(A)
LA90
dB(A)
LAmax
dB(A)
L1
30/10/2015 13:38
78
69
93
L2
30/10/2015 13:56
63
44
79
P2
10/11/2015 14:12
74
67
87
P1
10/11/2015 14:29
67
61
85
L2
17/11/2015 14:00
66
45
82
Comments
Constant vehicle movements on Richmond
Rd, with large number of trucks
Background and ambient noise, occasional
vehicle along Grange Ave
Constant vehicle movements on Richmond
Rd, with large number of trucks
Noise from Richmond Rd primarily and
Grange Ave
Occasional vehicle movements on Grange
Ave, including large trucks
4.3 Unattended Noise Survey Results
This assessment will consider the method for determining the RBL background for each period of the day in accordance
with the NSW OE&H Industrial Noise Policy (INP). The INP defines background and ambient noise for the daytime,
evening and night time periods as follows:
Day:
Evening:
Night:
is defined as 7:00am to 6:00pm, Monday to Saturday and 8:00am to 6:00pm Sundays & Public
Holidays.
is defined as 6:00pm to 10:00pm, Monday to Sunday & Public Holidays.
is defined as 10:00pm to 7:00am, Monday to Saturday and 10:00pm to 8:00am Sundays & Public
Holidays.
The RBL has also been calculated for the periods as required by the Blacktown City Council, which is the day and night
only. These levels have been presented in the criteria section.
NOISE SURVEY | 4
Noise Survey
A noise logger was placed at position L1 and L2 as shown in Figure 1 to measure the traffic noise from location L1, and
the ambient and background noise that is representative of the site and surrounding residential receivers at location L2.
Logger L1 was installed from the 13th to the 17th of November 2015. Logger L2 was installed from the 30th of October to
th
the 7 of November 2015. The results of the traffic noise survey from L1 are shown in Table 2 for the day and night
periods, and the results for the unattended background noise surveys are shown in Table 3 below (for the day, evening
and night periods).
Table 2: Unattended noise measurements L1
Equivalent Continuous Noise Level
Noisiest 1 Hour
LAeq,period - dB(A)
LAeq,1hour - dB(A)
Location
Day
Night
Day
Night
76
72
78
78
L1
Table 3: Unattended noise measurements L2
Equivalent Continuous Noise Level
Background Noise Level
LAeq,period - dB(A)
RBL - dB(A)
Location
L2
Day
Evening
Night
Day
Evening
Night
66
64
60
45
40
33
The local ambient noise environment is dominated by traffic noise on Richmond Road during the day time and late
evening, and a more typical suburban type environment during the night. Refer to Figure 2 for the noise data for the
traffic noise monitor and Figure 3 for the ambient and background noise monitor. Note that the rain affected data
during the period of logging has been excluded from the calculations.
Figure 2: Unattended noise monitor data L1
Richmond Road Noise Data
85
Sound Pressure Level - dB(A)
re 20 micropascals
80
75
L10
70
Leq
65
60
Day dd.mm.yyyy
NOISE SURVEY | 5
Noise Survey
Figure 3: Unattended noise monitor data L2
Background and Ambient Noise Data
80
Sound Pressure Level - dB(A)
re 20 micropascals
70
60
50
L10
Leq
40
L90
30
20
Day dd.mm.yyyy
NOISE SURVEY | 6
Criteria
5.
Criteria
5.1 Internal Noise Levels
This section details the criteria used to define the internal noise goals for spaces in the development.
5.1.1 Blacktown City Council Precincts DCP 2010
The Blacktown City Council (BCC) DCP states the following in regards to internal noise level requirements from traffic
noise:
Development effected by noise from rail or traffic noise is to comply with AS2107-2000 Acoustics: Recommended Design
Sound Levels and Reverberation Times for Building Interiors.
The DCP also states that the “Residential development shall aim to comply with the criteria in Table 4-1.
Table 4-1 from the DCP has been reproduced below.
Table 4: BCC DCP Table 4-1 for ‘Noise criteria for residential premises impacted by traffic noise’
Sleeping areas
Naturally ventilated/ windows open to
5% of the floor area (Mechanical
ventilation or air conditioning systems
not operating)
Doors and windows shut (Mechanical
ventilation or air conditioning systems
are operating)
Living areas
LAeq 15 hours (day): 40dBA
LAeq 9 hour (night): 35dBA
The noise criteria from Table 4 will be used for the assessment in addition to the requirements of the Infrastructure
SEPP as detailed below. For the assessment with mechanical ventilation operating, the design goal for external noise
intrusion will be 3dB less than the criteria as presented above, as it is assumed that the mechanical services will
contribute 3dB to the overall level.
5.1.2 Australia Standard (AS) 2107:2000
Australian Standard (AS) 2107:2000 – ‘Acoustics- Recommended design sound levels and reverberation times for building
interiors’ specifies target noise levels for internal spaces and values corresponding to the spaces that are expected to be
within the development, as summarised below Table 5.
Table 5: Recommended noise levels according to AS/NZS 2107:2000
Type of occupancy / activity
Small retail stores (general)
Recommended Design Sound Level, LAeq, dB(A)
Satisfactory
Maximum
45
50
The internal noise levels will be used for the non-residential spaces on ground level.
CRITERIA | 7
Criteria
5.1.3 Department of Planning: Development near Rail Corridors and Busy Roads – Interim Guideline
The DoP Interim Guideline has been considered for this development due to the proximity to Richmond Road, which
carries an AADT of greater than 20,000 vehicles AADT. The guideline details the application of clause 102 of the
Infrastructure State Environmental Planning Policy (SEPP) which states the following for residential developments:
“If the development is for the purpose of a building for residential use, the consent authority must be
satisfied that appropriate measures will be taken to ensure that the following LAeq levels are not exceeded:”

in any bedroom in the building : 35dB(A) at any time 10pm–7am

anywhere else in the building (other than a garage, kitchen, bathroom or hallway): 40dB(A) at
any time.
The guideline also states the following in regards to open windows assessment:
“If internal noise levels with windows or doors open exceed the criteria by more than 10dBA, the design of the ventilation
for these rooms should be such that occupants can leave windows closed, if they so desire, and also to meet the
ventilation requirements of the Building Code of Australia."
The SEPP clause is only applicable when there is greater than 40,000 vehicles AADT. The DoP Guideline is advisory when
there is between 20,000 and 40,000 vehicles AADT. In either case, this assessment will consider the specific
requirements from the SEPP clause as well as the BCC DCP, in order to satisfy the requirements.
CRITERIA | 8
Criteria
5.2 Site Noise Emission
The following section presents the criteria applicable for noise emissions from the development.
5.2.1 Blacktown City Council Precincts DCP 2010
The BCC DCP states the following in regards to noise emissions from residential developments:
No electrical, mechanical or hydraulic equipment or plant shall generate a noise level greater than 5dBA above
background noise level measured at the property boundary during the hours 7.00am to 10.00pm and noise is not to
exceed background levels during the hours 10.00pm to 7.00am.
The background level has been defined as the RBL, in accordance with the requirements of the NSW INP. Refer to Table
6 below for the criteria. Note that the RBL was calculated for the day and night periods based on the background noise
data in order to determine this criteria.
Table 6: Blacktown City Council criteria
Period
Noise Descriptor – dB(A)
Noise Criteria – dB(A)
Daytime 7am – 10pm
LAeq,15min ≤ RBL + 5
47
Night 10pm – 7am
33
5.2.2 NSW OEH Industrial Noise Policy
The NSW Office of Environment and Heritage (OEH) Industrial Noise Policy (INP) sets out noise criteria to control the
noise emission from industrial noise sources. Operational noise from the development resulting in external noise
emissions are addressed following the guideline in the NSW INP.
The calculation is based on the results of the ambient and background noise unattended monitoring, addressing two
components:

Controlling intrusive noise into nearby residences (Intrusiveness Criteria)

Maintaining noise level amenity for particular land uses (Amenity Criteria)
Once both criteria are established the most stringent for each considered assessment period (day, evening, night) is
adopted as the project-specific noise level (PSNL).
Note that the amenity criteria is not applicable to this development as there are no existing industrial noise sources, and
as such the intrusiveness criteria will be the most stringent criteria due to the low background levels.
Intrusiveness Criteria
The NSW OEH INP states the following:
“The intrusiveness of an industrial noise source may generally be considered acceptable if the
equivalent continuous (energy-average) A-weighted level of noise from the source (represented by
the Laeq descriptor), measured over a 15-minute period, does not exceed the background noise level
measured in the absence of the source by more than 5 dB(A).”
The intrusiveness criterion can be summarised as LAeq, 15 minute  RBL background noise level plus 5 dB(A).
CRITERIA | 9
Criteria
Table 7: OEH INP intrusiveness criteria
Period
Daytime 7am – 6pm
50
Evening 6pm – 10pm
45
Night 10pm – 7am
38
5.2.3 Project-specific noise levels (PSNL)
The resulting criteria applicable for noise emissions from the development are detailed below in the following tables.
Table 8 details the project specific noise levels (PSNL) to be used for mechanical, electrical or hydraulic noise, in
accordance with the requirements of Blacktown City Council, assessed at the property boundary. Table 9 below displays
the PSNL for the project in accordance with the requirements of the INP. This criteria will be applicable to any other
operational or noise emissions from the development, assessed at the most affected point on the residential boundary.
Table 8: Blacktown City Council criteria
Period
Daytime 7am – 10pm
47
Night 10pm – 7am
LAeq,15min ≤ RBL
33
Period
Descriptor
PSNL dB(A)
Day (7:00am to 6:00pm)
LAeq,15min
50
Evening (6:00pm to 10:00pm)
LAeq,15min
45
Night (10:00pm to 7:00am)
LAeq,15min
38
Table 9: Project specific noise levels
Where necessary, noise mitigation measures will be incorporated in the design to ensure that noise levels comply with
the recommended noise emission criteria noted above.
CRITERIA | 10
Criteria
5.3 Traffic Noise Generation Criteria
The LAeq noise level or the “equivalent continuous noise level” correlates best with the human perception of annoyance
associated with traffic noise.
Road traffic noise impact is assessed in accordance with the introduced NSW Road Noise Policy (Office of Environment
and Heritage July 2011) which supersedes the NSW Environmental Criteria for Road Traffic Noise (ECRTN, Department of
Environment Climate Change and Water 1999). The criterion (Table 3 – Road Traffic Noise Assessment Criteria for
Residential Land Uses) divides land use developments into different categories and lists the respective criteria for each
case. The category that is relevant to the proposed use of the site is shown below:
Table 10: NSW Road Noise Policy – Traffic noise assessment criteria
Assessment Criteria – dB(A)
Road Category
Type of project/land use
Day (7am – 10pm)
Night (10pm – 7am)
Freeway/arterial/subarterial roads
Existing Residences affected by additional traffic
on existing freeway/arterial/sub-arterial roads
generated by land use developments
LAeq,15 hour 60
(external)
LAeq,9 hour 55
(external)
Local roads
Existing residences affected by noise from new
local road corridors
LAeq,1 hour 55
(external)
LAeq,1 hour 50
(external)
In the event that the traffic noise at the site is already in excess of the criteria noted above, the NSW RNP states that the
primary objective is to reduce the existing level through feasible and reasonable measures to meet the criteria above.
If this is not achievable, Section 3.4.1 Process for applying the criteria – Step 4 states that for existing residences
affected by additional traffic on existing roads generated by land use developments, any increase in the total traffic
noise should be limited to 2 dB above that of the corresponding ‘no build option’.
CRITERIA | 11
Criteria
5.4 Construction Noise Criteria
Noise criteria for construction sites are established in accordance with the Interim Construction Noise Guideline (ICNG
July 2009) by the NSW Office of Environment &Heritage (NSW OE&H). It is important to note that the recommended
criteria are for planning purposes only. Numerous other factors need to be considered when assessing potential noise
impacts from construction works.
However, in undertaking the assessment of potential noise intrusion associated with the proposed construction activities,
Chapter 4 of the NSW OE&H ICNG (July 2009) were specifically referenced. The noise limits are presented in Table 11, and
are applicable to the development.
Table 11: NSW DECCW ICNG Construction Noise Criteria
Time of Day
Recommended
Standard Hours:
Management
Level
LAeq,15min *
Noise Affected
RBL + 10dB
Mon – Fri
(7am – 6pm)
Sat
(8am – 1pm)
No work on Sunday
& Public Holidays
Highly Noise
Affected
75 dB(A)
Outside
Recommended
Standard Hours
Noise Affected
RBL + 5dB
How to Apply
The noise affected level represents the point above which there may be some
community reaction to noise.

Where the predicted or measured LAeq,15min is greater than the noise
affected level, the proponent should apply all feasible and reasonable work
practices to meet the noise affected level.

The proponent should also inform all potentially impacted residences of the
nature of works to be carried out, the expected noise levels and duration as
well as contact details.
The highly noise affected level represents the point above which there may be strong
community reaction to noise.

Where noise is above this level, the relevant authority (consent,
determining or regulatory) may require respite periods by restricting the
hours that the very noisy activities can occur in, taking into account:

Times identified by the community when they are less sensitive to noise
(such as before and after school, for works near schools, or mid-morning or
mid-afternoon for works near residences)

If the community is prepared to accept a longer period of construction in
exchange for restrictions on construction times.

A strong justification would typically be required for works outside the
recommended standard hours.

The proponent should apply all feasible and reasonable work practices to
meet the noise affected level.

Where all feasible and reasonable practices have been applied and noise is
more than 5 dB(A) above the noise affected level, the proponent should
negotiate with the community.

For guidance on negotiating agreements see section 7.2.2.
* NOTE: Noise levels apply at the property boundary that is most exposed to construction noise, and at a height of 1.5
m above ground level. If the property boundary is more than 30 m from the residence, the location for measuring or
predicting noise levels is at the most noise-affected point within 30m of the residence. Noise levels may be higher at
upper floors of the noise affected residence.
Source: Chapter 4 (Table 2 Sec 4.1.1) of NSW OE&H ICNG
CRITERIA | 12
Criteria
5.5 Construction Vibration Criteria
The Office of Environment and Heritage (OEH) developed a document, “Assessing vibration: A technical Guideline” in
February 2006 to assist in preventing people from exposure to excessive vibration levels within buildings. The guideline
does not however address vibration induced damage to structures or structure-borne noise effects. Vibration and its
associated effects are usually classified as continuous, impulsive or intermittent.
5.5.1 Human Comfort – Continuous and Impulsive Vibration Criteria
Structural vibration in buildings can be detected by occupants and can affect them in many ways including reducing
their quality of life and also their working efficiency. Complaint levels from occupants of buildings subject to vibration
depend upon their use of the building and the time of the day.
Maximum allowable magnitudes of building vibration with respect to human response are shown in Table 12. It should
be noted that the human comfort for vibration are more stringent than the building damage criteria.
Table 12: Preferred and maximum weighted RMS values for continuous and impulsive vibration acceleration
(m/s2) 1-80Hz
Location
Continuous vibration
Residences
Offices, schools,
educational
institutions and place
of worship
Impulsive vibration
Residences
Offices, schools,
educational
institutions and place
of worship
Assessment
period1
z-axis
Preferred values
x- and y-axis
Maximum values
z-axis
x- and y-axis
Daytime
Night time
0.010
0.007
0.0071
0.005
0.020
0.014
0.014
0.010
Day or night
time
0.020
0.014
0.040
0.028
Daytime
Night time
0.30
0.10
0.21
0.071
0.60
0.20
0.42
0.14
Day or night
time
0.64
0.46
1.28
0.92
Human Comfort – Intermittent Vibration Criteria
Disturbance caused by vibration will depend on its duration and its magnitude. This methodology of assessing
intermittent vibration levels involves the calculation of a parameter called the Vibration Dose Value (VDV) which is used
to evaluate the cumulative effects of intermittent vibration. Various studies support the fact that VDV assessment
methods are far more accurate in assessing the level of disturbance than methods which is only based on the vibration
magnitude.
Table 13: Acceptable Vibration Dose Values for Intermittent Vibration (m/s1.75)
Daytime (7:00am to 10:00pm)
Location
Night-time (10:00pm to 7:00am)
Preferred value
Maximum value
Preferred value
Maximum value
Residences
0.20
0.40
0.13
0.26
Offices, schools, educational
institutions and place of worship
0.40
0.80
0.40
0.80
CRITERIA | 13
Criteria
5.5.2 Structural Damage – Vibration Criteria
Ground vibration criteria are defined in terms of levels of vibration emission from infrastructures or from the
construction activities which will avoid the risk of damaging surrounding buildings or structures. It should be noted that
human comfort criteria are normally expressed in terms of acceleration whereas structural damage criteria are normally
expressed in terms of velocity.
Most commonly specified structural vibration levels are defined to minimize the risk of cosmetic surface cracks and are
set below the levels that have the potential to cause damage to the main structure. Structural damage criteria are
presented in German Standard DIN4150-Part 3 “Structural vibration in buildings – Effects on structures” and British
Standard BS7385-Part 2: 1993 “Evaluation and Measurement for Vibration in Buildings”. Table 14 indicates the vibration
limits presented in DIN4150-Part 3 to ensure structural damage doesn’t occur.
Table 14: Guideline value of vibration velocity, vi, for evaluating the effects of short-term vibration
Vibration velocity, vi, in mm/s
Foundation
Line
1
2
3
Type of Structure
At a frequency of
Less than 10Hz
10 to 50Hz
50 to 100*Hz
Buildings used for commercial
purposes, industrial buildings
20
20 to 40
40 to 50
and buildings of similar design
Dwellings and buildings of similar
5
5 to 15
15 to 20
design and/or use
Structures that, because of their
particular sensitivity to vibration,
do not correspond to those listed
3
3 to 8
8 to 10
in lines 1 and 2 and are of great
intrinsic value (e.g. buildings that
are under a preservation order)
*For frequencies above 100Hz, at least the values specified in this column shall be applied
Plane of floor of
uppermost full
storey
All Frequencies
40
15
8
Table 15 presents guide values for building vibration, based on the lowest vibration levels above which cosmetic
damage has been demonstrated as per BS7385-Part 2:1993.
Table 15: Transient vibration guide values for cosmetic damage
Type of Building
Residential or light commercial type
buildings
Peak Particle Velocity in frequency range of predominant pulse (PPV)
4 Hz to 15 Hz
15 Hz and above
15mm/s at 4Hz increasing to 20mm/s at
20mm/s at 15Hz increasing to 50mm/s at
15Hz
40Hz and above
5.5.3 Vibration Objectives
Table 16 indicates the construction vibration criteria for the nearest residential properties to the development.
Table 16: Construction vibration criteria summary
Location
Residential
Period
Human Comfort Vibration Objectives
Continuous
Intermittent
mm/s2 (RMS)
m/s1.75 (VDV)
z-axis
x- and y-axis
Building damage
Objectives – Velocity
(mm/s)
Daytime
10 - 20
7 - 14
0.20 - 0.40
5
Night time
7 - 14
5 - 10
0.13 - 0.26
5
CRITERIA | 14
Noise Impact Assessment
6.
6.1 External Glazing
The general limiting factor of the performance of a building façade in term of noise attenuation is the glazing. In this
particular case of the proposed development, the traffic noise on Richmond Road provides the most acoustic demand
on the development facades. Traffic noise from Grange Avenue has also been considered for where it has an impact on
the facades of the proposed development.
Based on the Arup report “Richmond Road – Construction and Operation Noise Assessment, Document ref AAc/22023200/R01, Rev C”, it has been concluded that the night time and day time noise levels at the Richmond Road façade of the
proposed development are 64dB(A) 9hr LAeq and 68dB(A) 15hr LAeq respectively. These numbers are considered as
representative noise levels that the development will be exposed to, and are the highest values based on the future
2016 predictions. There is general agreement with the results from the Arup report and noise monitoring and
predictions conducted by WGE. The final noise levels used for this assessment are based on SoundPLAN modelling
calibrated to these levels. Note that no attenuation was considered through any external façade components such as
louvres etc. and as such the Rw values represent what is required from the outside to the internal spaces through all
components.
In order to achieve the internal noise levels specified in the BCC DCP, the minimum recommended glazing selection for
the façades of the proposed development is presented in Appendix 2. The required Rw ratings have been provided.
Note that the mark ups are indicative; hence the Rw legend for ‘Bedrooms’ applies only to bedrooms, and ‘Living rooms’
applies only to living rooms.
The ratings presented are based on the worst case scenario of external noise obtained from the attended noise
measurement, noise data from the unattended logger, and the Arup report. The glazing thicknesses corresponding to
the Rw ratings are presented below in Table 17, and should be considered as the minimum thicknesses to achieve
acoustical ratings. Greater glazing thicknesses may be required for structural loading, wind loading, thermal
requirements etc.
Table 17: Recommended acoustic performance of glazing system
Required Acoustic
Rating of Glazing
1
Assembly, Rw
Fixed Single Glazed System
Fixed Double Glazed System
Double Glazed Sliding Door
System
31
6mm float glass
Any
-
32
6.38mm laminated glass
Any
-
34
6mm/12mm air cavity/6mm
-
6.5 Vlam Hush/ 12mm air
cavity/6mm toughened
10mm/12mm air cavity/6.38mm
laminated
6mm Toughened / 12mm Air /
36
6.38mm laminated
6mm Toughened / 12mm Air /
37
6.5 Vlam Hush
SoundOUT sliding door - primary
4mm float/16mm air
541 Sliding door (4mm Tgh) and
39
12.5mm Vlam Hush
cavity/8.5mm Vlam Hush
100mm air gap / 4mm
toughened glass
The required acoustic rating of glazing assembly, refers to the acoustic performance of the glazing once installed on site
(including the frame)
During the detailed design stage of the project the acoustic performance of the glazing facade should be reviewed as
the combined noise from external sources and mechanical services could result in the internal noise level exceeding the
design sound level (LAeq,T dBA).
1
See Appendix 1 for Rw definition
NOISE IMPACT ASSESSMENT | 15
6.2 Open Windows Scenario
An open windows assessment has been conducted in order to assess whether the habitable spaces can meet the
internal noise level requirements with windows open for natural ventilation. Where open windows cannot be achieved
due to the exceedance of the internal noise levels criteria, alternative means of ventilation is required in accordance
with the requirements of the NCC (mechanical ventilation or air conditioning system complying with AS 1668.2 and
AS/NZS 3666.1).
Refer to Figure 17 and Figure 18 in Appendix 2 for the living rooms and bedrooms which do not require an alternative
means of ventilation, as they can have open windows and achieve the internal noise level requirements in accordance
with the BCC DCP during the day and night time. Only the rooms marked up do not require an alternative means, whilst
all other apartments will.
6.3 Mechanical Services Noise Emissions
The following noise sources are associated with the site operation, and details about expected noise levels from these
sources are given in the ensuing sub-sections. Noise sources from general operations at the site typically include
mechanical services noise from air-conditioning equipment and exhaust fans etc. servicing the residential units and car
parks. These noise sources have been used to predict the worst case scenario noise impact of the proposed use of the
site to nearby residential receivers.
The proposed residential development will be provided with air-conditioning systems with the external condenser units
located on the balconies.
The main mechanical sources associated with the development will include:



External air conditioner units (CU) on the balconies;
Car park exhaust fan (CPEF) and car park supply fan (CPSF) with exhaust and intake on ground level on the west
boundary;
Roof mounted fans
In order to assess the worst case scenario, it was assumed that the air conditioning units associated with the residential
apartments are running at any time throughout a 24hr period. The units have been calculated from all building façades
to the most affected residential receiver. With all, the night time is the most stringent period for the noise generated by
the operation of mechanical plant; therefore this criterion was used as the noise target at the boundary of the nearest
sensitive receivers for the project.
6.3.1 Proposed Noise Levels
The following noise levels include the implementation of the acoustic mitigation measures as detailed below. They are
also based on assessing noise to the north, east and south boundaries only, as the west boundary is Richmond Road is
contains no sensitive receiver in close proximity.
Table 18 presents the proposed maximum sound power levels for individual outdoor air conditioning condenser units
(CU) to achieve the noise criteria shown in Table 9 at the boundary of the nearest receivers.
Table 18: Proposed acoustic power for individual CU
Lw re 1pW
Item
External CU
63 Hz 125 Hz
59
64
250 Hz
500 Hz
1 KHz
2 KHz
4 KHz
8 KHz
Overall
dB(A)
58
50
49
47
45
40
56
Table 19 below presents the proposed sound power level for the car park exhaust fan (CPEF) in the basement, such that
compliance is achieved with the surrounding receivers due to noise emission from the ground level exhaust.
Table 19: Proposed acoustic power for CPEF in basement plant room
Lw re 1pW
Item
CPEF
63 Hz 125 Hz
83
80
250 Hz
500 Hz
1 KHz
2 KHz
4 KHz
8 KHz
Overall
dB(A)
81
82
81
80
76
69
86
Table 20 below presents the proposed sound power level for the car park supply fan (CPSF) in the basement, such that
compliance is achieved with the surrounding receivers due to noise emission from the ground level intake.
Table 20: Proposed acoustic power for CPSF in basement plant room
Lw re 1pW
Item
CPSF
63 Hz 125 Hz
83
80
250 Hz
500 Hz
1 KHz
2 KHz
4 KHz
8 KHz
Overall
dB(A)
81
82
81
80
76
69
86
It is our opinion that the project specific noise levels at the boundaries of the surrounding receivers should be met if the
requirements of Table 18, Table 19 and Table 20 are satisfied, and the acoustic mitigation measures detailed below are
implemented correctly.
6.3.2 Mitigation measures
The following mitigation measures are required in order to achieve the relevant criteria to the boundary with the
proposed noise levels as presented above –




The south and east facades of the buildings at the south and east property boundaries (adjacent to the future
residential) shall have balustrades at least 1.2 metres high with no gap at the bottom, such that the condenser
units are shielded to the adjacent residential properties;
Install 50mm internal lining and attenuators to the car park supply fans intake side with an insertion loss as
required to achieve the external noise limits. Intake must be at least 10 metres from the nearest boundary;
Install 50mm internal lining and attenuators to the car park exhaust fans discharge side with an insertion loss
as required to achieve the external noise limits. Exhaust must be at least 10 metres from the nearest boundary;
The roof top exhaust and intake fans shall have a sound power level no more than 64dB(A). If required,
attenuators and 50mm internal duct lining shall be installed to achieve the noise limits at the external
boundary;
Note that this is a preliminary solution as the design is yet to be finalised, it is recommended that an updated acoustic
report is conducted at a later juncture when more information becomes available about the specific units to be used.
6.4 Delivery and Waste Truck Noise
An acoustic assessment for the garbage and waste collection has been conducted to determine the noise levels to the
nearest residential receiver, in accordance with the requirements of the NSW INP.
The emitted noise from the garbage truck was modelled using a 3D model in Soundplan 7.1 in accordance with the
methods outlined in ISO 9613-2.
The noise levels used in the assessment are shown below in Table 21.
Table 21: Sound power level for garbage truck
Sound Power Level LAmax(SWL) re 10-12 W dB
Source
Octave Band Centre Frequency (Hz)
63
125
250
500
1000
2000
4000
Garbage Truck Unloading
Bins
97
96
93
95
95
92
91
Truck loading/unloading
97
97
96
97
97
97
97
The predicted noise levels at the nearing sensitive receivers are summarized below in Table 22.
Table 22: Predicted Noise Levels from garbage collection with mitigation measures
Receiver Location
Predicted Noise Level
dB(A)
Evening Criterion
dB(A)
Compliance
(Yes/No)
Eastern boundary residential
receivers
41
45
Yes
6.4.1
Waste and Delivery Operations Acoustic Mitigation Measures
In order to achieve the requirements of the NSW INP, the following waste operations measures are proposed:



The waste collection area located at block E shall have a roller door installed that is at least 1mm thick steel (or
equivalent to achieve Rw 28), and remained closed during any waste collection activities taking place.
Garbage collection to be undertaken during the day time and evening only;
Bottles are to be broken up away from the site;
6.5 Road Traffic Noise Impact Assessment
For the road traffic noise assessment, traffic numbers and generated vehicles was based on the information provided
GTA consultants. All vehicle movements will enter and exit via Grange Avenue, as such this assessment will consider the
noise generation to the most affected residential receivers along Grange Avenue. The existing vehicle numbers and
predicted increase is shown in Table 23 (note that these have been estimated based on the provided data, however
considered worst case scenario), and the results of the noise assessment shown in Table 24. The existing traffic noise
levels were based on logger data along Grange Avenue and predictions.
Table 23: Existing and predicted traffic flow volumes (peak hour)
Traffic Volume
Grange Avenue
Existing vehicles
Generated vehicles
Post-Development
Day (15hr)
Night (9hr)
Day (15hr)
Night (9hr)
Day (15hr)
Night (9hr)
6600
3960
3056
1833
9656
5793
Based on the noise measurements from the existing traffic, Table 24 presents the predicted noise levels due to traffic
noise increase.
Table 24: Predicted increase in traffic noise levels
Existing Noise Levels
Predicted Noise Levels
Proposed maximum Noise
Levels
LAeq-1hour, dB(A)
LAeq-1hour, dB(A)
LAeq-1hour, dB(A)
58.5
60.1
60.0
Yes
53.5
55.1
55.0
Yes
Location
Grange Avenue
(15hr)
Grange Avenue
(9hr)
Complies (Yes/No)
As shown in Table 24, there is not predicted to be any increase above the maximum noise level on Grange Avenue due
to the additional traffic from the development (0.1dB is considered negligible). Based on this assessment, the proposed
development is expected comply with the requirements of the NSW RNP.
Note that this assessment has not considered noise generation from the new local road within the development due to
the unknown nature of the future residential receivers. This assessment should be conducted at a later juncture. This
would be assessed under the NSW RNP peak hour conditions of a maximum noise level of 55dB(A) during day time, and
50dB(A) during night time.
Conclusion
7.
Conclusion
An acoustic assessment for the proposed mixed-use development at 223 & 225 Grange Avenue and 999 Richmond
Road, Marsden Park has been conducted. This document forms part of the documentation package to be submitted to
local authorities as part of the DA process.
This report has provided criteria, in-principle treatment and design requirements which aim to achieve the statutory
criteria discussed in Section 5. In terms of noise criteria we have provided the following:



Internal noise levels in accordance with the Blacktown City Council DCP in section 5.1 for the residential
component, and AS2107 for the retail spaces;
Noise criteria for emissions from the development to residential receivers in accordance with Blacktown
City Council and the NSW INP, provided in section 5.2;
Construction noise criteria provided in section 5.4 in accordance with the ICNG
Glazing for the building has been designed to achieve internal noise levels in accordance with the requirements of the
BCC DCP. The glazing is presented in section 6.1 and Appendix 2. This glazing will also satisfy the requirements of the
DoP Interim Guideline and the Infrastructure SEPP.
An open windows assessment has been conducted in accordance with the requirements of the BCC DCP. The areas
which no not require mechanical ventilation (cannot have natural ventilation through open windows) are presented in
section 6.1 and Appendix 2.
For external noise emissions, the day, evening and night time criteria is expected to be met with the implementation of
the proposed sound power levels for the external air conditioning units and for the car park exhaust and supply fans.
A traffic generated noise assessment has been conducted for vehicle movements onto Grange Avenue. Based on the
data provided by GTA consultants, the post development traffic noise levels are expected to comply with the
requirements of the NSW RNP.
The information presented in this report shall be reviewed if any modifications to the features of the development
specified in this report occur, including and not restricted to selection of air-conditioning units, layout of equipment,
modifications to the building and introduction of any additional noise sources.
CONCLUSION | 20
Appendix
Appendix 1 - Glossary of Acoustic Terms
NOISE
Acceptable Noise Level:
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.
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.
Ambient Noise:
The all-encompassing noise associated within a given environment at a given time,
usually composed of sound from all sources near and far.
Assessment Period:
The period in a day over which assessments are made.
Assessment Location
The position at which noise measurements are undertaken or estimated.
Background Noise:
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.
Decibel [dB]:
The units of sound pressure level.
dB(A):
A-weighted decibels. Noise measured using the A filter.
Extraneous Noise:
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.
Free Field:
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:
Frequency is synonymous to pitch. Frequency or pitch can be measured on a scale
in units of Hertz (Hz).
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.
Appendix
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.
Reflection:
Sound wave changed in direction of propagation due to a solid object met on its
path.
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.
Appendix
Appendix 2 – Glazing mark-ups and open windows
Figure 4: Glazing for building A, B and C ground
Figure 5: Glazing for building A, B and C upper ground
Appendix
Figure 6: Glazing for building A, B and C upper levels
Appendix
Figure 7: Glazing for building D and E ground
Appendix
Figure 8: Glazing for building D and E upper ground
Appendix
Figure 9: Glazing for building D and E upper levels
Appendix
Figure 10: Glazing for building F ground
Figure 11: Glazing for building F upper ground
Appendix
Figure 12: Glazing for building F upper levels
Figure 13: Glazing for building G and H ground
Appendix
Figure 14: Glazing for building G and H upper ground
Figure 15: Glazing for building G and H level 1-3
Appendix
Figure 16: Glazing for building G and H upper levels
Appendix
Figure 17: Locations where alternative means of ventilation not required
Appendix
Figure 18: Locations where alternative means of ventilation not required

Vital Experience - Blacktown City Council

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