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Attach H- Acoustic report
Attached to the e-mail MCU16/0012 - 5 Garnet Street Cooroy.
REPORT
3 GARNET STREET, COOROY – ACOUSTIC ASSESSMENT
JOB NO.: 0101
DATE: 02/02/2016
CLIENT: Creekgold Pty Ltd
Prepared by:
MRG Environmental
P: 07 3841 0815
F: 07 3841 0817
Ground Level 88 Brandl St, Eight Mile Plains QLD 4113
PO Box 6794 Upper Mt Gravatt QLD 4122
www.mrgenvironmental.com
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DOCUMENT TYPE: Report DOCUMENT REFERENCE: 0101-R1-01 PROJECT: 3 GARNET STREET, COOROY – ACOUSTIC ASSESSMENT CLIENT: Creekgold Pty Ltd PROJECT MANAGER: Matthew Goodfellow DOCUMENT CONTROL Documents Reference Description Date Author R1-01 Report 02/02/2016 Matthew Goodfellow © 2016 MRG Environmental Pty Ltd trading as MRG Environmental All Rights Reserved. Copyright of this document belongs to MRG Environmental Pty Ltd trading as MRG Environmental and may not be used, sold, reproduced, stored, or distributed/transmitted in any form or by any means, electronic, photocopying, recording or otherwise without the prior written consent of MRG Environmental Pty Ltd trading as MRG Environmental. 0101-R1-01 VerveBD Garnet Street, Cooroy Noise Report.docx i Report Creekgold Pty Ltd | 0101
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Contents
1 Introduction ........................................................................................................................................ 1
1.1 Project Description .................................................................................................................... 1
2 Noise Criteria ...................................................................................................................................... 3
2.1 Commercial Noise Criteria ......................................................................................................... 3
2.1.1 Sleep Disturbance .............................................................................................................. 4
3 Existing Noise Environment ............................................................................................................... 5
4 Commercial Noise Assessment........................................................................................................ 10
4.1 Predicted Noise Levels ............................................................................................................. 11
4.2 Assessment of Predictions ....................................................................................................... 13
5 Conclusion ........................................................................................................................................ 14
6 References ........................................................................................................................................ 15
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1 Introduction
MRG Environmental (MRG) has been requested by Verve Building Design and Concepts (VerveBD) on
behalf of Creekgold Pty Ltd to conduct an acoustic assessment of the proposed commercial
development at 3 Garnet Street, Cooroy (Real property description Lot 14 on RP845961).
This report assesses the following:
Amenity – Noise assessment of proposed commercial activity onto surrounding existing
sensitive receivers.
1.1 Project Description
The proposed site is at 3 Garnet Street, Cooroy, as shown in Figure 1.1. Residential properties are
located to the south across Garnet Street and west, while commercial properties are located to the
north across Wimmers Lane and east.
S1
N5
N2
S2
SITE
N3
N4
N1
S3
S4 S5 S6
Figure 1.1: Site Locality (Source: QLD Globe)
VerveBD has advised the proposed development, as shown in Figure 1.2, consists of the following:
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Supermarket sales and storage area
Car parking on the ground and basement levels.
Delivery dock located on the northern portion of the site adjacent to Wimmers Lane.
Roof top plant room and plant deck.
The site is proposed to operate 6:00 am to 9:00 pm, 7 days a week.
Figure 1.2: Proposed Site Layout (Source: VerveBD Ref: 14056-DA02 Rev D dated 08/01/15)
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2 Noise Criteria
2.1 Commercial Noise Criteria
The ‘Background Plus’ noise limits are widely accepted in Queensland as being appropriate noise
limits for minimising the risk of noise complaints. ‘Background Plus’ noise limits are regularly used
by Department of Environment and Heritage Protection (EHP) when specifying noise criteria or
assessing noise complaints. Traditionally ‘Background Plus’ criteria have been applied as presented
in Table 2.1.
Table 2.1: Informal ‘Background Plus’ Noise Criteria
Noise Sensitive Place
Daytime 7am - 6pm LAmax,adj ≤ Background noise level plus 5 dB(A)
Evening 6pm - 10pm LAmax,adj ≤ Background noise level plus 5 dB(A)
Nighttime 10pm - 7am LAmax,adj ≤ Background noise level plus 3 dB(A)
Noise Sensitive Commercial Place
Daytime 7am - 6pm LAmax,adj ≤ Background noise level plus 10 dB(A)
Evening 6pm - 10pm LAmax,adj ≤ Background noise level plus 10 dB(A)
Nighttime 10pm - 7am LAmax,adj ≤ Background noise level plus 8 dB(A)
Note: Background noise level is defined as LAbg,T.
These limits are based on superseded AS 1055.2:1989 ‘Acoustics-Description and measurement of
environmental noise Part 2: Application to specific situations’ reference:
Where LAmax,adj,T is greater than LAbg,T, the noise is likely to be discernible and if the difference
is substantial enough the noise will be annoying.
It should be noted that AS 1055.2:1989 also states the following:
Difference of 5 dB or less may be of marginal significance with respect to annoyance.
AS 1055.1:1989 ‘Acoustics-Description and measurement of environmental noise Part 1: General
Principles’ states that:
LA90,T is commonly taken to be an approximation of LAbg,T
LA10,T is commonly taken to be an approximation of LAmax,T
With adoption of the Environmental Protection (Noise) Policy 2008, Reprint 1A, 2012 ‘Background
Plus’ criteria have been changed from those used informally. Environmental Protection (Noise)
Policy 2008 adopts the following ‘Background Plus’ criteria to control background creep:
(b) for noise that varies over time measured by LAeq,adj,T—more than 5dB(A) greater than the
existing acoustic environment measured by LA90,T.
The latest ‘Background Plus’ noise criteria as defined in the Environmental Protection (Noise) Policy
2008 have been used to assess potential annoyance from the proposed site. The use of an LAeq
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descriptor allows for the accumulated noise level emission from numerous sources to be assessed simultaneously. 2.1.1 Sleep Disturbance World Health Organisation document entitled “Guidelines for Community Noise” (WHO, 1999) recommends that to avoid sleep disturbance within bedrooms, indoor guideline values of 45 dB LAmax should be adopted for single sound events. Therefore an internal noise level goal of 45 dB(A) LAmax has been used to assess the potential for sleep disturbance from industry to the southeast of the site. A facade reduction of 5 dB(A) is assumed for windows open and therefore an external limit of 50 dB(A) L Amax has been assumed. Transient LAmax events from the proposal were also compared to the existing LAmax traffic exposure of surrounding sensitive receivers. 0101-R1-01 VerveBD Garnet Street, Cooroy Noise Report.docx 4 Report Creekgold Pty Ltd | 0101
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3 Existing Noise Environment
MRG conducted noise measurements to establish the existing ambient noise environment. Noise
measurements were conducted at Location N1, N2 and N3 located on the southeastern,
northeastern and southwestern portions of the site respectively, as presented on Figure 1.1.
Measurements were conducted from Thursday 16 to Monday 20 July 2015 with Larson Davies LD831
sound level meters. The noise loggers were field calibrated with no significant drift noted during the
measurement period. Audio snap shots were recorded at the commencement of each monitoring
interval. Dominant noise sources were road traffic and commercial (mechanical plant) noise.
Extraneous plant noise at location N2 has been removed from the measurement summary.
Weather observations were taken from the nearest Bureau of Meteorology (BOM) station being
Tewantin (Tewantin RSL Park Station Ref: 040908) and Cooroy AL (Station Ref: 540325). Inclement
weather was noted during the monitoring period from 3:00 pm to midnight on 19/07/2015.
Extraneous plant noise at location N2 has been removed from the measurement summary.
A summary of unattended and attended measurements are presented in Table 3.1, Table 3.2 and
Table 3.3 for monitoring Location N1, N2 and N3 respectively. Table 3.4 summarises measured
background noise levels at Location N1, N2 and N3. Plots of LA1, LA10, LAeq and LA90 are presented in
Figure 3.1, Figure 3.2, and Figure 3.3 for N1, N2 and N3 respectively. Attended measurements were
also conducted on Monday 20 July 2015 at Location N4 and N5 (see Figure 1.1) to determine the
exposure of existing residences to road traffic noise originating from Garnet Street and Wimmers
Lane. A summary of these measurements is presented in Table 3.5.
The following time periods are considered:
Daytime is taken to be 7:00 am to 6:00 pm.
Evening is taken to be 6:00 pm to 10:00 pm
Nighttime is the remaining hours of the day being 10:00 pm to 7:00 am.
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Table 3.1: Summary of Unattended Noise Measurements at Location N1
Measured Noise Level (dB(A))
Descriptor Period
Minimum Maximum Average
Daytime (7am-6pm) 61.0 97.2 73.3
LAmax Evening (6pm-10pm) 56.1 78.1 65.1
Nighttime (10pm-7am) 43.9 86.3 60.0
Daytime (7am-6pm) 57.1 80.8 64.0
LA1 Evening (6pm-10pm) 53.2 66.1 57.4
Nighttime (10pm-7am) 39.9 72.7 52.6
Daytime (7am-6pm) 50.1 70.1 56.9
LA10 Evening (6pm-10pm) 46.2 55.8 50.1
Nighttime (10pm-7am) 37.3 61.5 44.9
Daytime (7am-6pm) 39.9 59.2 46.3
LA90 Evening (6pm-10pm) 37.6 44.1 40.9
Nighttime (10pm-7am) 29.8 47.3 36.7
Daytime (7am-6pm) 48.3 69.1 57.3
LAeq Evening (6pm-10pm) 44.1 55.6 48.3
Nighttime (10pm-7am) 34.2 60.9 47.3
Table 3.2: Summary of Unattended Noise Measurements at Location N2
Measured Noise Level (dB(A))
Descriptor Period
Minimum Maximum Average
Daytime (7am-6pm) 59.3 98.5 72.6
LAmax Evening (6pm-10pm) 49.7 78.0 60.7
Nighttime (10pm-7am) 44.6 86.5 55.4
Daytime (7am-6pm) 52.2 82.1 60.9
LA1 Evening (6pm-10pm) 46.8 63.8 52.8
Nighttime (10pm-7am) 40.4 72.1 49.6
Daytime (7am-6pm) 47.8 76.0 54.3
LA10 Evening (6pm-10pm) 42.9 53.4 47.4
Nighttime (10pm-7am) 39.2 56.0 45.9
Daytime (7am-6pm) 41.4 50.4 45.1
LA90 Evening (6pm-10pm) 39.7 46.4 43.2
Nighttime (10pm-7am) 35.1 48.6 40.2
Daytime (7am-6pm) 46.2 72.7 58.3
LAeq Evening (6pm-10pm) 41.4 51.1 46.6
Nighttime (10pm-7am) 38.6 60.1 46.1
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Table 3.3: Summary of Unattended Noise Measurements at Location N3
Measured Noise Level (dB(A))
Descriptor Period
Minimum Maximum Average
Daytime (7am-6pm) 60.4 93.5 70.0
LAmax Evening (6pm-10pm) 55.6 73.8 63.5
Nighttime (10pm-7am) 41.4 80.2 58.7
Daytime (7am-6pm) 56.5 68.7 62.8
LA1 Evening (6pm-10pm) 52.7 62.7 57.5
Nighttime (10pm-7am) 36.5 67.0 50.9
Daytime (7am-6pm) 46.8 62.3 56.3
LA10 Evening (6pm-10pm) 43.7 55.6 48.5
Nighttime (10pm-7am) 32.4 59.7 42.2
Daytime (7am-6pm) 33.7 57.9 45.5
LA90 Evening (6pm-10pm) 31.9 40.6 36.0
Nighttime (10pm-7am) 25.6 55.5 31.9
Daytime (7am-6pm) 45.4 65.3 55.7
LAeq Evening (6pm-10pm) 41.9 52.1 46.9
Nighttime (10pm-7am) 29.9 57.9 44.8
Table 3.4: Summary of Background Noise Levels
Measured Noise Level (dB(A))
Location
Daytime Evening Nighttime
N1 43 40 32
N2 43 42 38
N3 39 34 30*
Note: Background levels were calculated by lowest 10th percentile LA90. A minimum background of 30 dB(A) is applied where RBL is less
than 30 dB(A).
Table 3.5: Summary of Attended Noise Level Measurements
Location LAmax LAeq Comments
N4 59 - 70 (64) 60.3
LAmax from vehicles
N5 58 - 74 (63) 55.6
Note: Values in brackets are averages.
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Figure 3.1: Measured Noise levels at N1
Figure 3.2: Measured Noise levels at N2
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Figure 3.3: Measured Noise levels at N3 0101-R1-01 VerveBD Garnet Street, Cooroy Noise Report.docx 9 Report Creekgold Pty Ltd | 0101
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4 Commercial Noise Assessment
The environmental noise model was configured using the CadnaA Version 4.5.151 noise prediction
software (DataKustik, 2013) with calculations based on ISO 9613 ‘Acoustics — Attenuation of sound
during propagation outdoors’ algorithms.
The noise modelling takes into consideration the activity and equipment sound power levels of the
industrial operations to the southeast of the site and includes adjustments for attenuation from
geometric spreading, acoustic shielding from intervening ground topography, ground effect and
atmospheric absorption. The algorithm is inherently conservative, representing enhanced noise due
to moderate downwind conditions.
Ground absorption is set to G = 0 for roads (internal and external) and paved areas (e.g. hardstand,
carparks, etc.) the remainder of the model domain is set to G = 1. Buildings presented in the site
plan (see Figure 1.2) are included within the model. In addition, surrounding residential buildings
are included within the model with the height taken from site visits and aerial photography.
Topographical information for the site was provided by Noosa Shire Council (NSC), development
layout provided by VerveBD (Drawing: 14056 DA06 Rev C dated 8/01/2015, DA02 Rev D 8/01/2015).
Figure 4.1 presents the existing topography of the site and the extents of the model domain.
Figure 4.1: Topography Site & Surrounds
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Floor levels were provided by VerveBD (Drawing: 14056 DA06 Rev C dated 8/01/2015) as presented
in Table 4.1.
Table 4.1: Assumed Floor Levels
Building Level Level (RL)
Basement 111.10
Ground (including car park) 114.00
Shopping Centre Mezzanine 117.60
Top of Parapet 119.50
Mezzanine (roof) 120.50
The noise sources identified and their estimated sound power levels (L WA) are presented in Table 4.2.
Operational hours are proposed as presented in Section 1.1.
Modelled traffic movement data is based on hourly generation profiles provided by Pekol Traffic and
Transport (PTT). Table 4.3 provides the modelled movements within a 1 hour period for daytime,
evening and night. These movements are based on the peak hour traffic generation provided by
PTT.
Table 4.2: Commercial Premises Operations
Noise Sources Operation Est. LWA
Patron Vehicles see Table 4.3 LAmax 88 (moving), 92 (stationary)
Trucks (heavy rigid) LAmax 107 (moving)
Refrigerated Delivery Vehicle LAeq 99 (stationary)
Internal Plant Room* All hours LAeq 81 (stationary) (internal)
(includes Bitzer 4TC - 8.2Y, 4TC - 8.2Y, 4DC - 5.2Y,
4H - 15.2Y, 4H - 15.2Y, 4PC - 10.2Y)
External Plant Deck* All hours LAeq 84 (stationary)
(includes Bitzer DV121BQ, LDV302BNQ)
Note: * Mechanical plant will need to be confirmed during detailed design and mechanical plant mitigation reassessed.
Table 4.3: Modelled Hourly Traffic Movements
Peak Hour Traffic Movement (Trips)
Location Vehicle Types
Day Evening Night
Car park Cars 111 51 17
Delivery dock Refrigerated HRV 1 1 -
4.1 Predicted Noise Levels
Noise levels (LAeq and LAmax) from the proposed development were predicted at existing sensitive
receivers. Predictions were made as follows:
Vehicle and mechanical plant LAeq as presented in Table 4.4 with no barriers.
Vehicle and mechanical plant LAeq as presented in Table 4.5 with no evening deliveries.
Vehicle LAmax as presented in Table 4.6 with no evening deliveries.
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Table 4.4: Predicted LAeq Noise Levels at Sensitive Receivers
Predicted LAeq
Criterion Refrigerated
Location Vehicles Plant Total
Vehicle
D E N D E N D E All D E N
S1 46 45 41 37 36 25 42 42 28 44 43 30
S2 46 45 41 21 19 10 35 35 31 37 36 31
S3 42 37 33 33 30 25 31 31 33 37 36 34
S4 42 37 33 36 32 27 32 32 33 38 37 34
S5 42 37 33 38 35 30 35 35 31 41 39 34
S6 46 43 35 42 39 34 49 49 27 50 49 35
Note: D, E, N denote daytime, evening and nighttime respectively.
Table 4.5: Predicted LAeq Noise Levels at Sensitive Receivers (No Evening Deliveries)
Predicted LAeq
Criterion Refrigerated
Location Vehicles Plant Total
Vehicle
D E N D E N D All D E N
S1 46 45 41 37 36 25 42 28 44 37 30
S2 46 45 41 21 19 10 35 31 37 31 31
S3 42 37 33 33 30 25 31 33 37 35 34
S4 42 37 33 36 32 27 32 33 38 35 34
S5 42 37 33 38 35 30 35 31 41 37 34
S6 46 43 35 42 39 34 49 27 50 39 35
Note: D, E, N denote daytime, evening and nighttime respectively.
Table 4.6: Predicted LAmax Noise Levels at Existing Sensitive Receivers
Predicted LAmax
Criterion
Location Vehicles
Night Night
S1 50/57 45
S2 50/57 28
S3 50/58 42
S4 50/58 43
S5 50/58 46
S6 50/64 51
Note: Nighttime criteria are based on sleep disturbance and existing measured L Amax noise levels.
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4.2 Assessment of Predictions
Predicted vehicle LAeq noise levels are presented in Table 4.4 and Table 4.5. The restriction of
deliveries to the daytime only produces residual exceedances of 4 dB during the daytime at S6
(Cooroy Hotel) and 1 dB during the nighttime at locations S3 to S5 (residences).
The Cooroy Hotel (S6) is exposed to existing daytime noise from public roads in the order of 57 dB(A)
LAeq (based on Location N1). Given the predicted noise levels from vehicles on site are 7 dB less than
the existing levels LAeq levels at S6, the residual exceedance of 4 dB during the daytime is not
considered significant.
It is noted that during the nighttime at location S3 to S5 the predictions for vehicles and mechanical
plant when considered individually meet the nominated criterion. It is noted that the predictions of
vehicle noise during the nighttime are for the period 6:00 am to 7:00 am which would coincide with
a higher background (average LA90 of 40 dB(A)) than that considered for the entire nighttime period.
Given the higher background during 6:00 am to 7:00 am the residual exceedance of 1 dB for
combined mechanical plant and vehicle noise is not considered significant.
Mechanical plant is predicted to meet the nominated criteria (see Table 4.5). However, additional
analysis during the detailed design phase of the final plant selection should be conducted to ensure
limits are met.
Predicted LAmax noise levels are presented in Table 4.6. The noise assessment has considered sleep
disturbance criteria, and as the surrounding sensitive receivers are already exposed to traffic noise, a
comparison is also made against the existing LAmax noise levels.
Predicted noise levels from patron vehicles (cars) meet the sleep disturbance criteria as presented in
Table 4.6 as the predicted levels from the site are below those already received from traffic on
public roads.
The following recommendations are made:
Deliveries and refuse collection should be during the daytime only (7:00 am to 6:00 pm).
Grates in trafficked areas should be dampened (e.g. rubber inserts) to limit reaction.
Mechanical plant for the purposes of assessment was assumed to determine a benchmark as
the mechanical plant for the proposed development is yet to be selected. It is proposed that
during the detailed stages of the project, an assessment of the mechanical plant noise
emissions from the site be conducted using the actual plant model selections and
installation arrangements be made to ensure that the nominated limits are met. Therefore
noise limits are proposed to inform the selection of mechanical plant for the development.
Table 4.5 presents noise limits to be met at the nearest existing sensitive receivers to the
proposed development.
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5 Conclusion
MRG Environmental conducted a noise impact assessment for the proposed commercial
development at 3 Garnet Street, Cooroy. The assessment was conducted to assess noise emanating
from the proposed development and recommend treatment to achieve the nominated noise level
criteria.
Commercial noise was assessed using ‘background plus’ and sleep disturbance criteria during the
nominated operational hours.
The results of the assessment are as follows:
Deliveries and refuse collection should be during the daytime only (7:00 am to 6:00 pm).
Grates in trafficked areas should be dampened (e.g. rubber inserts) to limit reaction.
Mechanical plant for the purposes of assessment was assumed to determine a benchmark as
the mechanical plant for the proposed development is yet to be selected. It is proposed that
during the detailed stages of the project, an assessment of the mechanical plant noise
emissions from the site be conducted using the actual plant model selections and
installation arrangements be made to ensure that the nominated limits are met. Therefore
noise limits are proposed to inform the selection of mechanical plant for the development.
Table 4.5 presents noise limits to be met at the nearest existing sensitive receivers to the
proposed development.
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6 References Datakustik (2013). CadnaA Noise Prediction Software Version 4.5.151. DataKustik GmbH. Munich, Germany. EHP (2008). Environmental Protection (Noise) Policy 2008 Explanatory Notes for SL 2008 No. 442. Office of the Queensland Parliamentary Counsel, Brisbane. EHP (2012). Environmental Protection (Noise) Policy 2008, Reprint 1A, Office of the Queensland Parliamentary Counsel, Brisbane. International Organization for Standardization (1993). ISO 9613 Acoustics – Attenuation of sound during propagation outdoors. Standards Australia (1989). AS 1055.1: 1989 Acoustics-Description and measurement of environmental noise Part 1: General Principles. Standards Australia, Sydney. Standards Australia (1989). AS 1055.2: 1989 Acoustics-Description and measurement of environmental noise Part 2: Application to specific situations. Standards Australia, Sydney. Standards Australia (1997). AS 1055.1-1997 Acoustics – Description and measurement of environmental noise – General procedures. Standards Australia, Sydney. Standards Australia (1997). AS 1055.2-1997 Acoustics – Description and measurement of environmental noise – Application to specific situations. Standards Australia, Sydney. World Health Organisation (1999). Guidelines for community noise, World Health Organisation, Bonn, Germany. 0101-R1-01 VerveBD Garnet Street, Cooroy Noise Report.docx 15 Report Creekgold Pty Ltd | 0101