· serviced apartments on Levels 4-6 The development site is exposed to road traffic noise (buses,...

Sound and Vibration Consulting EngineersABN 44 133 737 443

www.AcousticConsulting.com.au

Acoustic Consulting Engineers Pty Ltd

PO Box 3450 PUTNEY NSW 2112

Telephone: +61 (0) 2 8006 5560 Facsimile: +61 (0) 2 8006 5559

[email protected]

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Tuesday 16 May 2017

Redfern Accommodation Pty Ltd C/- Ghazi Al Ali Architect Unit 2, Level 2 14 Railway Parade BURWOOD NSW 2134

Our Reference 170865-01L-DD Rev01

For the attention of Ghazi Al Ali Architect

Noise Assessment – Development Application (DA) Phase Proposed Mixed-Use Development 4-10 Albert Road, Strathfield

1.0 INTRODUCTION

Acoustic Consulting Engineers Pty Ltd was engaged by Redfern Accommodation Pty Ltd to prepare a noise assessment for the proposed mixed-use development at 4-10 Albert Road, Strathfield.

This report presents a summary of the noise assessment for the purpose of development application (DA) consideration only.

The findings from the noise assessment and recommendation are site specific and have been prepared for the particular investigation described in this report. The report should not be used in any other context or for any other purposes.

2.0 DESCRIPTION OF SITE AND PROPOSAL

The subject site is located at 4-10 Albert Road, Strathfield and currently consists of an existing café.

The proposal is to re-develop the subject site to provide:

retail space, storage rooms and garbage/waste rooms, services (lift and pump room) and car-park spaces on Ground Level, Mezzanine Level and Level 1;

office spaces on Levels 2 and 3; and

serviced apartments on Levels 4-6

The development site is exposed to road traffic noise (buses, taxis and cars) on Albert Road and rail traffic noise to the north-east.

Figure 1 shows the location of the subject site and the surrounding. Appendix 1 provides the conceptual floor plans of the proposed development.

Sound and Vibration Consulting Engineers

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Figure 1 Site Location

3.0 POTENTIAL ACOUSTIC ISSUES

From the site inspections and review of the drawings, potential acoustic issues associated with the proposed mixed-use development include:

external road (buses, taxis and cars) and rail traffic noise intrusion into the residential component (serviced apartments) of the proposed development;

environmental noise (eg. car-park supply and exhaust fans and air-conditioning equipment); and

acoustic privacy between the serviced apartments and between the serviced apartments and common spaces.

Site inspections confirmed that vibration from train pass-bys was undetectable, not an issue for the proposed development site and is not considered further in this report.

4.0 NOISE MEASUREMENT

Existing road and rail traffic noise exposed to the development site were measured on the roof of the existing café along the north-eastern site boundary (most exposed location of the subject site, Figure 1) from Friday 24 March 2017 to Saturday 1 April 2017.

Measurement instrumentation consisted of a Type 1 SVAN959 sound and vibration analyser and a Type 1 GRAS 40-AE prepolarised condenser microphone.

Noise Measurement Location


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The instrumentation was checked before and after the measurements with a SVAN SV30A acoustic calibrator and no significant drift in calibration was detected.

Observations during the site inspection, equipment set up and retrieval confirmed that the prevailing existing noise environment was controlled by intermittent road traffic (buses, taxi and cars) on Albert Road, rail traffic and foot passengers in connection with Strathfield Railway Station. Albeit, observations from a number of site inspections confirmed that noise from bird (lorikeet) population was predominant during the early morning (around 5:00am – 7:00am) and evening (around 7:00pm – 8:00pm). Noise from the café (patrons and background music) also contributed to the measured noise levels.

As environmental noise varies with time and the human ear is not equally sensitive to noise at different frequencies, A-weighted statistical levels are used to describe environmental noise. The common parameters used to describe environmental noise are the LAmax, LA1, LA10, LA90 and LAeq levels measured over 15-minute intervals.

The LAmax level is the maximum A-weighted sound pressure level over the sampling period. The LA1, LA10 and LA90 levels are the A-weighted sound pressure levels exceeded for 1%, 10% and 90% of the sampling periods respectively. The LA90 level is usually referred to as the background noise level. The LAeq level is the A-weighted continuous equivalent (energy average) sound pressure level over the sampling period.

Appendix 2 presents graphical summary of the measured statistical noise levels at 15-minute intervals. The LA90 and LAeq acoustic parameters are used for the present noise assessment. Other acoustic parameters are provided for information only.

Table 1 presents the measured day/evening/night LA90 background and LAeq ambient noise levels representative of those at the surrounding properties.

Table 2 presents and measured daytime (LAeq,15hr)/night-time (LAeq,9hr) noise levels exposed to the proposed development. The measured LAeq levels include noise from all sources including road and rail traffic, birds/lorikeets (during morning and evening hours), people to and from the railway station and surrounding commercial developments.


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Table 1 Measured Existing Background and Ambient Noise Environment, dB(A)

Measured Existing Noise Environment, dB(A)

LA90 LAeq Date

Day1 Evening2 Night3 Day Evening Night

Friday 24 March 2017 59.9 43.3 69.4 65.4

Saturday 25 March 2017 54.5 59.3 42.9 65.5 69.8 66.0

Sunday 26 March 2017 50.9 57.7 44.0 64.0 69.5 66.6

Monday 27 March 2017 56.9 60.2 50.2 68.4 70.0 68.0

Tuesday 28 March 2017 56.3 59.2 41.2 67.2 69.8 64.8

Wednesday 29 March 2017 56.9 60.1 45.3 67.4 69.9 64.3

Thursday 30 March 2017 55.5 60.3 42.9 66.5 68.4 63.6

Friday 31 March 2017 55.1 61.1 44.3 65.5 69.5 64.9

Rating LA90 Background Level 55 60 44 N/A

Logarithmic Average N/A 67 70 66 Notes: 1. Day is from 7:00am-6:00pm, Monday to Saturday and 8:00am-6:00pm, Sunday 2. Evening is from 6:00pm-10:00pm 3. Night is from 10:00pm-7:00am, Monday to Saturday and 10:00pm-8:00am, Sunday

Table 2 Measured Existing LAeq,15hr and LAeq,9hr Noise Level, dB(A)

Measured Noise Level, dB(A) Date

LAeq,15hr1 (Daytime) LAeq,9hr

2 (Night-time)

Friday 24 March 2017 65.4

Saturday 25 March 2017 67.1 66.0

Sunday 26 March 2017 66.5 66.2

Monday 27 March 2017 68.9 68.0

Tuesday 28 March 2017 68.1 64.8

Wednesday 29 March 2017 68.2 64.3

Thursday 30 March 2017 67.1 63.6

Friday 31 March 2017 67.0 64.9

Logarithmic Average 68 66 Notes: 1. LAeq,15hr is daytime noise level from 7:00am to 10:00pm

2. LAeq,9hr is night-time noise level from 10:00pm to 7:00am


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5.0 NOISE ASSESSMENT OBJECTIVES

5.1 Environmental Noise

Environmental noise from the proposed mixed-use development will be mechanical plant and equipment such as car-park supply and exhaust fans and air-conditioning equipment.

The Environment Protection Authority (EPA) Industrial Noise Policy (INP) recommends guidelines for the assessment of mechanical plant noise from the development in terms of controlling the levels of intrusive noise and maintaining the acoustic amenity for the particular areas.

To control intrusive noise at nearby properties, the EPA:INP recommends that the LAeq,15min noise level from mechanical plant should not exceed the rating background LA90 noise level by more than 5dB(A).

For acoustic amenity in an urban area, the EPA:INP recommends acceptable LAeq noise levels from industrial sources of 60/50/45dB(A) during day/evening/night respectively.

Table 3 presents the recommended LAeq noise levels at the surrounding properties potentially affected by noise from mechanical plant associated with the proposed mixed-use development, established from the measured background noise levels presented in Table 1 and the EPA:INP guidelines.

The project specific noise assessment objectives are the lower of the intrusive and amenity noise assessment objectives. That is, noise from the development will comply with both the intrusive and amenity assessment objectives, provided that the project specific assessment objectives are achieved.

Table 3 Recommended LAeq Noise Assessment Objective, dB(A)

Recommended LAeq Noise Level Assessment Location Time of Day

Intrusiveness Amenity Project Specific

Day1 60 60 60

Evening2 604 50 50 Residential receivers

Night3 49 45 45

Commercial receivers When in Use 65 Notes: 1. Day is from 7:00am-6:00pm, Monday to Saturday and 8:00am-6:00pm, Sunday 2. Evening is from 6:00pm-10:00pm 3. Night is from 10:00pm-7:00am, Monday to Saturday and 10:00pm-8:00am, Sunday 4. Evening noise assessment objective is set not higher than that during daytime


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5.2 External Road and Rail Traffic Noise Intrusion

For residential developments (serviced apartments) affected by noise from existing roads and rail-lines, the Environmental Protection Authority (EPA) Road Noise Policy (RNP) and Rail Infrastructure Noise Guideline (RING) refer to the State Environmental Planning Policy (SEPP) (Infrastructure) 2007 and Department of Planning “Development near Rail Corridors and Busy Roads – Interim Guideline” to set appropriate indoor noise levels.

The requirements of Clauses 87 and 102 of State Environmental Planning Policy (SEPP) (Infrastructure) 2007 are as follows:

“If the development is for the purposes of a building for residential use, the consent authority must not grant consent to the development unless it is satisfied that appropriate measures will be taken to ensure that the following LAeq levels are not exceeded:

35dB(A) at any time between 10:00pm and 7:00am in any bedroom in the building; and

40dB(A) at any time anywhere else in the building (other than a garage, kitchen, bathroom or hallway)”.

The acoustic requirements of the Department of Planning “Development near Rail Corridors and Busy Roads – Interim Guideline” are the same as those in SEPP (Infrastructure) 2007.

Table 4 presents a summary of the recommended indoor design noise objectives for the proposed residential (serviced apartment) development with windows and doors closed.

Table 4 Indoor Noise Design Objectives

Type of Occupancy Indoor Design LAeq Noise

Objective, dB(A) Assessment Period

Bedrooms 35 10:00pm to 7:00am

Other habitable areas (other than garage, kitchen, bathroom and hallway) 40 any time

With reference to the Department of Planning “Development near Rail Corridors and Busy Roads – Interim Guideline”, airborne noise is calculated as LAeq,9hr (night-time) and LAeq,15hr (daytime) and these acoustic parameters are adopted for the present noise assessment.


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6.0 ASSESSMENT


Environmental noise from mechanical plant associated with the proposed mixed-use development would mainly be due to car-park supply and exhaust fans and air-conditioning equipment for the commercial/retail spaces and serviced apartments.

As the proposal is conceptual and development application has not been approved, mechanical plant has not been selected or finalised and details of equipment noise levels are not available at this time.

Based on similar development and given the site location, it is considered that with appropriate equipment siting and provision of mitigation measures, noise from mechanical plant and equipment would be controlled to within the environmental noise assessment objectives presented in Table 3.

6.2 External Road and Rail Traffic Noise Intrusion

Excluding the high noise levels from the bird/lorikeet colony during the early morning and evening hours and taking account of further distance separation, the predicted road and rail traffic noise levels at the most exposed façade of the serviced apartments on Levels 3-6 are 65dB(A) LAeq,15hr (daytime) and 63dB(A) LAeq,15hr (night-time).

To reduce the indoor road and rail traffic noise levels (windows/doors in closed condition) to within 35dB(A) LAeq,9hr (night-time) for sleeping areas and 40dB(A) LAeq,15hr (daytime) for other habitable areas (except garage, kitchen, bathroom and hallway), the following noise reductions are required across the building envelop:

28dB for sleep areas; and

25dB for other habitable areas (except garage, kitchen, bathroom and hallway)

The above noise reductions may be achieved by employing appropriate building construction elements/systems (architectural/building treatments).

6.3 Acoustic Privacy between Sole-Occupancies

Acoustic privacy between the residential units (serviced apartments) and between the residential units (serviced apartments) and common spaces relates to airborne sound insulation and impact sound isolation for walls and floors and control of noise from waste services.

The acoustic privacy between spaces can be controlled by incorporating appropriate construction materials/systems to control air-borne noise and floor covering and/or isolation of plasterboard ceiling and ceiling cavity insulation to control floor impact sound. Noise from waste services can be controlled by wrapping services/waste pipes with acoustic lagging and/or construction of appropriate ceiling and ceiling cavity insulation below the services/waste pipes.


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7.0 RECOMMENDATION


It is recommended that a qualified acoustic consultant be engaged during the design phase of the project, when details of mechanical plant and equipment and noise emission levels are available, to review the potential environmental noise impact from the development.

Measures that could be considered to reduce noise from mechanical plant and equipment associated with the project include:

appropriate equipment specification and selection based on acoustic performance;

incorporating engineering measures such as acoustic attenuators, internally lined ductwork and bends to car-park supply and exhaust fan intakes and discharges;

appropriate equipment siting (eg. outdoor condenser units located on roof level or on balconies (behind balcony walls); and

locating noisy plant and equipment within purpose-built plant room(s).

7.2 External Road Traffic Noise Intrusion

With typical residential building (serviced apartment) constructions, the weakest path for external noise intrusion into the development would be the exposed windows/doors.

To reduce the indoor noise levels to within the recommended levels in Section 5.2, external glazed windows/doors shall achieve the weighted sound reduction indices (Rw) of not less than those recommended in Table 5.

Table 5 Recommended Minimum Weighted Sound Reduction Index (Rw)

Recommended Weighted Sound Reduction Index (Rw) Location

Sleeping Areas Other Habitable Areas

North-eastern Façade (Albert Road and rail-line frontage) 33 31

Southern Façade 31 29

Western Façade 31 29

As a guide, typical window/door systems to achieve the weighted sound reductions recommended in Table 7 are:

Rw33 8.38m–10.38mm laminated glass in acoustic rated window/door frames and installed with acoustic rated seals around the window /door frames (acoustic construction).


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Rw31 6.38m laminated glass in acoustic rated window/door frames and installed with acoustic rated seals around the window/door frames (acoustic construction).

Rw29 6mm float glass in acoustic rated window/door frames and installed with acoustic rated seals around the window/door frames (acoustic construction).

The required acoustic performances shall be achieved for the entire window/door systems (including the frames, wall/frame joints/junctions), not just the glass.

It is recommended that:

manufacturers/suppliers/installers be consulted for a specific design solution to satisfy the recommended Rw rating in Table 5, for the window/door systems.

approved Q-lon foam acoustic rated seals or equivalent be fitted to all acoustically rated windows/doors. Mohair/fin/brush/felt seals are not satisfactory for acoustic performance.

window/door acoustic rated seals set to full closure and under slight compression with even pressure all round when windows/doors are closed.

all gaps around/between the door/window frames and façade openings be sealed air-tight with silicone or similar non-hardening mastic prior to fitting any weather strips.

all open extrusions forming perimeter frames to aluminium windows/doors be detailed to ensure that the frames do not de-rate the acoustic performance of the windows/doors.

there shall be no penetrations in the external walls exposed to Albert Road and the rail-line that could de-rate the acoustic performance of the building.

subject to review and approval by a qualified acoustic engineer, penetrations for mechanical ventilation/air-conditioning shall be detailed, caulked and sealed air-tight with non-hardening acoustic sealant to ensure that the acoustic performances of the external wall systems are not de-rated.

7.3 Acoustic Privacy

It is recommended that acoustic privacy between sole-occupancies be reviewed by a qualified acoustic consultant during the design phase of the project and appropriate construction systems should be incorporated into the design and construction to ensure the National Construction Code (NCC)/Building Code of Australia (BCA) acoustic requirements for sole-occupancies are achieved.


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8.0 SUMMARY

The assessment has shown that external road/rail traffic noise intrusion into the residential (serviced apartment) component of the proposed mixed-use development at 4-10 Albert Road, Strathfield can be controlled with appropriate building constructions.

The recommended Rw values for the external window/door glazing are minimum. Alternative glazing performances equivalent to or higher than the Rw values recommended in Table 5 may be used.

Vibration from train pass-bys on the rail-lines to the north-east was not perceptible at the subject site at the time of the site inspections and noise measurements.

With appropriate equipment selection based on acoustic performance, siting and provision of mitigation measures, noise from mechanical plant and equipment would be controlled to within the environmental noise assessment objectives.

The NCC/BCA acoustic privacy requirements between spaces can be controlled by incorporating appropriate construction materials/systems to control air-borne noise and floor covering and/or isolation of plasterboard ceiling and ceiling cavity insulation to control floor impact sound. Noise from waste services can be controlled by wrapping services/waste pipes with acoustic lagging and/or construction of appropriate ceiling and ceiling cavity insulation below the services/waste pipes.

It is recommended that a qualified acoustic consultant be engaged during the design phase of the project, when details of mechanical plant and equipment and noise emission levels are available, to review the potential environmental noise impact from the development. Where necessary, mitigation measures shall be incorporated into the development to ensure that the environmental noise assessment objectives recommended in Section 5.1 of this report are achieved. Additionally, it is recommended that acoustic privacy between sole-occupancies be reviewed by a qualified acoustic consultant during the design phase of the project and appropriate construction systems be incorporated to ensure the NCC/BCA acoustic requirements for sole-occupancies are achieved.

The assessment and recommendations in this report relate to acoustic considerations only. Any other requirements such as ventilation, structural adequacy, etc., should be addressed by others.


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We trust the information in this letter is satisfactory. Please do not hesitate to contact our office should further information or clarification be required.

Yours sincerely,

Dan Dang Principal Acoustic Engineer Acoustic Consulting Engineers Pty Ltd


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Appendix 1

CONCEPT FLOOR PLANS


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Ground Level


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Mezzanine Level


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Level 1


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Level 2


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Level 3


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Level 4


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Level 5


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Level 6


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Appendix 2

NOISE MEASUREMENT RESULTS

Measurement Location 4-10 Albert Road, Strathfield Project Title Proposed Mix-used Developmenton roof structure 4-10 Albert Road, Strathfield

Measurement Date Notes 1. Tabulated LAeq are logarithically averaged

2. Tabulated LA01 and LA10 are arithmetically averaged

3. Tabulated LA90 are the lowest 10-percentile levels

LAeq LA01 LA10 LA90

00:00-01:0001:00-02:0002:00-03:0003:00-04:0004:00-05:0005:00-06:0006:00-07:0007:00-08:0008:00-09:0009:00-10:0010:00-11:0011:00-12:0012:00-13:0013:00-14:0014:00-15:0015:00-16:0016:00-17:0017:00-18:0018:00-19:00 64.6 69.9 66.7 59.619:00-20:00 73.9 77.7 75.1 63.420:00-21:00 65.8 70.7 67.4 59.321:00-22:00 65.7 72.1 67.9 61.322:00-23:00 67.3 73.7 69.7 62.423:00-24:00 66.9 73.0 69.2 62.2 Day Evening 69.4 72.8 69.3 59.9 Night 65.4 70.7 65.6 43.3 LAeq,15hr LAeq,9hr LAeq,24hr

65.4

Friday, 24 March 2017

TimeAverage Noise Level

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LAeq LA01 LA10 LA90

00:00-01:00 61.4 69.4 64.1 48.701:00-02:00 59.8 69.1 62.3 43.702:00-03:00 59.4 67.9 61.9 43.603:00-04:00 54.7 65.4 55.8 41.704:00-05:00 64.6 72.3 67.2 53.105:00-06:00 66.8 71.6 69.1 60.406:00-07:00 70.9 75.4 72.9 66.907:00-08:00 63.3 72.6 66.2 52.408:00-09:00 62.4 71.6 65.4 52.609:00-10:00 64.0 74.1 66.2 56.410:00-11:00 65.5 75.2 68.1 55.911:00-12:00 64.7 74.1 66.8 56.612:00-13:00 65.1 75.7 67.6 56.013:00-14:00 65.3 72.9 67.7 57.914:00-15:00 66.8 77.1 68.7 58.315:00-16:00 66.0 76.0 68.2 58.816:00-17:00 66.8 75.5 68.5 59.917:00-18:00 65.0 74.2 67.2 58.818:00-19:00 65.8 73.2 67.6 58.619:00-20:00 74.2 77.2 75.3 65.920:00-21:00 65.9 73.1 67.8 60.921:00-22:00 66.2 73.4 68.8 61.022:00-23:00 67.3 74.1 69.8 62.123:00-24:00 66.6 72.8 68.9 61.0 Day 65.5 74.5 67.5 54.5 Evening 69.8 74.3 69.7 59.3 Night 66.0 70.8 65.2 42.9 LAeq,15hr LAeq,9hr LAeq,24hr


67.1

Saturday, 25 March 2017

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66.566.266.2

Sunday, 26 March 2017

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68.968.068.3

Monday, 27 March 2017

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68.164.867.6

Tuesday, 28 March 2017


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68.2

Wednesday, 29 March 2017

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67.163.666.4

Thursday, 30 March 2017

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67.064.966.2

Friday, 31 March 2017

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LAeq LA01 LA10 LA90

00:00-01:00 60.6 67.9 61.6 47.501:00-02:00 59.2 67.1 61.5 44.802:00-03:00 56.7 68.0 57.9 42.903:00-04:00 58.3 67.8 61.3 43.904:00-05:00 62.6 69.8 63.4 46.605:00-06:00 66.3 71.7 68.9 58.006:00-07:00 69.7 74.7 72.0 65.707:00-08:00 62.2 70.2 63.8 49.308:00-09:00 61.0 69.5 63.2 51.109:00-10:00 61.4 71.3 63.4 52.610:00-11:00 61.6 71.3 64.2 52.611:00-12:00 62.6 72.7 64.7 53.412:00-13:0013:00-14:0014:00-15:0015:00-16:0016:00-17:0017:00-18:0018:00-19:0019:00-20:0020:00-21:0021:00-22:0022:00-23:0023:00-24:00 Day Evening Night LAeq,15hr LAeq,9hr LAeq,24hr

Saturday, 1 April 2017


20.0

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