MB DEVELOPMENT CONSTRUCTION NOISE AND VIBRATION - Auckland Council
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MB DEVELOPMENT
CONSTRUCTION NOISE AND VIBRATION
Rp 003 2016907A | 1 May 2018
84 Symonds Street
PO Box 5811 Wellesley Street
Auckland 1141 New Zealand
T: +64 9 379 7822 F: +64 9 309 3540
www.marshallday.com
Project: MB DEVELOPMENT
Prepared for: Drive Holdings Ltd
103 Carlton Gore Rd
Newmarket
Auckland 1023
Attention: Doug Osborne
Report No.: Rp 003 2016907
Disclaimer
Reports produced by Marshall Day Acoustics Limited are based on a specific scope, conditions and limitations, as
agreed between Marshall Day Acoustics and the Client. Information and/or report(s) prepared by Marshall Day
Acoustics may not be suitable for uses other than the specific project. No parties other than the Client should use any
information and/or report(s) without first conferring with Marshall Day Acoustics.
The advice given herein is for acoustic purposes only. Relevant authorities and experts should be consulted with regard
to compliance with regulations or requirements governing areas other than acoustics.
Copyright
The concepts and information contained in this document are the property of Marshall Day Acoustics Limited.
Use or copying of this document in whole or in part without the written permission of Marshall Day Acoustics
constitutes an infringement of copyright. Information shall not be assigned to a third party without prior consent.
Document Control
Status: Rev: Comments Date: Author: Reviewer:
Draft For client review 29 Mar 2018 James Whitlock
Approved R01 4 Apr 2018 James Whitlock Joanne Valentine
Approved R02 Client comments 1 May 2018 James Whitlock
TABLE OF CONTENTS 1.0 INTRODUCTION .......................................................................................................................................... 4 2.0 NOISE AND VIBRATION PERFORMANCE STANDARDS ............................................................................. 4 2.1.1 Construction Noise .................................................................................................................................. 4 2.1.2 Construction Vibration............................................................................................................................ 6 3.0 PROJECT INFORMATION ............................................................................................................................ 7 4.0 KEY RECEIVERS ............................................................................................................................................ 9 5.0 CONSTRUCTION NOISE ASSESSMENT ....................................................................................................... 9 5.1 Noise Model ................................................................................................................................................ 9 5.1.1 Modelled Scenarios................................................................................................................................. 9 5.1.2 Modelling Considerations ..................................................................................................................... 10 5.1.3 Modelling Limitations ........................................................................................................................... 10 5.2 Noise Sources ............................................................................................................................................ 11 5.3 Predicted Noise Levels ............................................................................................................................. 11 5.3.1 Demolition and Earthworks stages ...................................................................................................... 11 5.3.2 Foundations stage ................................................................................................................................. 12 5.3.3 Superstructure stage............................................................................................................................. 12 5.3.4 Discussion .............................................................................................................................................. 12 5.4 Trucks on Patterson Avenue .................................................................................................................... 12 5.5 Acoustic Barriers ....................................................................................................................................... 13 6.0 CONSTRUCTION VIBRATION ASSESSMENT ............................................................................................ 13 7.0 RECOMMENDED CONDITIONS ................................................................................................................ 14 8.0 CONCLUSION............................................................................................................................................. 15 APPENDIX A GLOSSARY APPENDIX B PREDICTED FAÇADE NOISE LEVELS APPENDIX C SOUNDSPLASHES APPENDIX D GRID NOISE MAPS This document may not be reproduced in full or in part without the written consent of Marshall Day Acoustics Limited Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 3
1.0 INTRODUCTION
Marshall Day Acoustics (MDA) has been engaged by Drive Holdings Ltd to undertake a noise and
vibration assessment of construction activities for the proposed MB development in Mission Bay.
It is understood that the works will involve demolition of current buildings, excavation of two
basement levels, and construction of an 8-level complex that includes parking, retail, residential and
a cinema complex in five separate blocks. The buildings will incorporate precast panels.
There are a number of residential and commercial buildings to the east and south, and these will be
the key receivers in this assessment.
This assessment should be read in conjunction with the Project construction noise and vibration
management plan (CNVMP) – refer MDA report Rp 004 2016907 dated 1 May 2018. The CNVMP is
the key construction document as it summarises the finding of this assessment and sets out best
practicable options (BPO) for mitigation and management.
A glossary of acoustic terms is attached in Appendix A.
2.0 NOISE AND VIBRATION PERFORMANCE STANDARDS
The Auckland Unitary Plan – Operative in Part (AUP-OP) contains noise and vibration rules as well as
up-to-date standards and methods for noise and vibration management.
The Project site is zoned Business - Local Centre in the AUP-OIP and the surrounding properties
comprise a multitude of zones, however the construction noise and vibration controls are the same
in all cases. The only differentiator is between occupied buildings that contain activities sensitive to
noise1 and other occupied buildings i.e. shops to the north-east and west.
The term ‘occupied’ refers to whether people are present while construction noise is being
generated. If they are away from home (i.e. at work during the day), there is no effect to manage.
Chapter E25 contains the following controls for construction noise and vibration.
2.1.1 Construction Noise
Chapter E25.6.27 of the AUP-OIP contains the controls shown in Tables 1 and 2 below and overleaf,
and Figure 1 overleaf. The construction timeframe is longer than 20 weeks, so the -5 decibel
adjustment required by E25.6.27(4) has been applied to all values.
Table 1: Construction noise levels for activities sensitive to noise1 – residential receivers
Time of week Time period Maximum noise level (dB)
LAeq LAFmax
Weekdays 6:30am - 7:30am 55 70
7:30am - 6:00pm 70 85
6:00pm - 8:00pm 65 80
8:00pm - 6:30am 40 70
Saturdays 6:30am - 7:30am 40 70
7:30am - 6:00pm 70 85
6:00pm - 8:00pm 40 70
8:00pm - 6:30am 40 70
1
Defined in AUP-OIP Chapter J as “Any dwelling, visitor accommodation, boarding house, marae, papakāinga, integrated residential
development, retirement village, supported residential care, care centres, lecture theatres in tertiary education facilities, classrooms in
education facilities and healthcare facilities with an overnight stay facility.”
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Sundays and public 6:30am - 7:30am 40 70
holidays 7:30am - 6:00pm 50 80
6:00pm - 8:00pm 40 70
8:00pm - 6:30am 40 70
Figure 1: Construction noise levels for activities sensitive to noise1 – residential receivers
85
Night Morning Day Evening Night
80
75
70
Noise Limit (dB LAeq)
65
60
55
50
45
40
Weekdays Saturdays Sundays & Public Holidays
35
0:00
2:00
4:00
6:00
8:00
0:00
10:00
12:00
14:00
16:00
18:00
20:00
22:00
Time (hour)
Table 2: Construction noise levels for other occupied buildings – retail receivers
Time period Maximum LAeq noise level (dB)
7:30am - 6:30pm 70
6:30pm - 7:30am 75
Noise from construction work is measured and assessed in accordance with the requirements of New
Zealand Standard NZS6803:1999 “Acoustics – Construction noise”.
Key aspects to note in relation to this Project are:
• The daytime controls for residential and retail receivers are identical, except that the daytime
period for retail ends 30 minutes later (6.30pm c.f. 6.00pm)
• The night-time controls for residential and retail receivers are very different i.e. residential is
35 dB more stringent. If possible, the worksite should be arranged with this in mind i.e. noise
generating sources at night be positioned along the northern site boundary
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2.1.2 Construction Vibration
Cosmetic Damage to Buildings
Chapter E25.6.30.1a of the AUP-OIP states that construction vibration must be controlled to ensure it
does not exceed the limits set out in German Standard DIN 4150-3:1999 “Structural Vibration -
Effects of Vibration on Structures”. The short-term (transient)2 vibration limits in Figure 2 apply at
building foundations in any axis. The vibration limits in all other cases are summarised in Table 3.
Figure 2: Short-term (transient)1 vibration at building foundations (DIN 4150-3 1999: Figure 1)
Table 3: Vibration at horizontal plane of highest floor (DIN 4150-3 1999: Tables 1 and 3)
Structure Type Peak Particle Velocity Vibration Level (mm/s)
Short-term (transient)2 Long-term (continuous)3, 4
Line 1. Commercial or Industrial buildings 40 10
Line 2. Residential buildings 15 5
Line 3. Historic or Sensitive Structures 8 2.5
The criteria relate to the avoidance of cosmetic building damage, such as cracking in paint or
plasterwork. Cosmetic building damage effects are deemed ‘minor damage’ in the Standard and can
generally be easily repaired. The cosmetic building damage thresholds are much lower than those
that would result in structural damage. The Standard states: "Experience has shown that if these
values are complied with, damage that reduces the serviceability of the building will not occur."
2
Short-term (transient) vibration is “vibration which does not occur often enough to cause structural fatigue and
which does not produce resonance in the structure being evaluated”
3
Long-term (continuous) vibration includes types not covered by the short-term vibration definition
4
The long-term (continuous) criteria can apply at all floor levels, but levels are normally highest at the top floor
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Vibration Amenity
The vibration amenity controls in Chapter E25.6.30.1b of the AUP-OIP impose a daytime limit of
2 mm/s peak particle velocity (PPV) on construction and demolition activities, as received inside
occupied buildings.
Chapter E25.8.2c of the AUP-OIP contains assessment criteria, which are the matters Council is
required to consider in granting an application. The assessment criteria include matters such as
communication, consultation, monitoring, activity duration and the potential for cosmetic damage –
all of which are addressed and enacted by a CNVMP.
Therefore, it is considered that with the controls and strict practice guidelines provided by the
CNVMP, in particular communication strategies and ongoing positive stakeholder management, any
effects caused by brief exceedances of the vibration amenity limits can be well managed.
3.0 PROJECT INFORMATION
Table 4 below shows the Project staging, estimated timeframes and the anticipated high noise
machinery for each stage.
Construction hours will be 0630 - 1900hrs, Monday to Friday, and 0730 – 1800hrs on Saturday, but
may vary with season slightly. Quiet works may occur outside of these times, provided they comply
with the Project limits in Section 2.0.
The overall construction period will be 3 – 4 years and run in the stage order listed below, with some
overlaps between stages:
Table 4: Construction staging, timing and proposed machinery
Stage Estimated time Proposed machinery
Demolition 1 month Large excavators, trucks
Earthworks 6 months Large excavators, bored piling rigs, small drilling rig,
air compressor, trucks
Foundations 3 months Concrete pump, trucks, tower cranes
Structure to ground floor 4 months Concrete pump, tower cranes, trucks
Superstructure
- East block 18 months Tower cranes, trucks, concrete pump, concrete drills,
hand tools
- South block 12 months Tower cranes, trucks, concrete pump, concrete drills,
hand tools
- North block 22 months Tower cranes, trucks, concrete pump, concrete drills,
hand tools
- West block 20 months Tower cranes, trucks, concrete pump, concrete drills,
hand tools
- Cinema 8 months Tower cranes, trucks, concrete pump, concrete drills,
hand tools
Following superstructure works, fit-out activities will occur but these are likely to comply with all
relevant noise and vibration limits.
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The following points are noted in relation to the proposed machinery:
• Cranes There will be 4 tower cranes, positioned in the middle of each block within
the podium courtyard. They will be electric, so will generate no noise during
operation, other than safety sirens to indicate they are lifting or moving. The
sirens can cause annoyance, but this will be a management rather than
compliance issue
• Excavators It is understood that 4 – 6 large excavators (assumed to be 40 tonne) will be
active during the demolition and earthworks phases. They will generally
utilise jaw attachments during demolition and bucket attachments during
earthworks. Earthworks will start in the south-east corner and progress to
the north-west
• Piling rigs Two secant piling rigs have been included in the model. It is assumed that
this method is sufficient to establish the basement perimeter wall and that
neither pile casings nor sheet piles will be required. Piling works will start in
the south-east corner and progress to the north-west
• Trucks Trucks and truck-and-trailer units will be used to bring material to the site,
and to cart away spoil during the earthworks phase. There are two loading
zones adjacent to the site – one on Tamaki Drive and one on Patteson Ave.
The sound from trucks idling in these locations and driving on the site is
included in SoundPLAN model. The sound from trucks driving on Patteson
Road, which includes dwellings has been addressed in Section 5.4.
• Concrete pump Noise from concrete pumps is predominantly from the engine that drives
the pump, but on some model types there is a periodic clunking noise from
the agitator that can cause annoyance. If practicable, the use of such pump
types should be avoided
• Hand tools During the superstructure phase, hand tools will be required to fasten the
precast panels, and to construct the building interiors. Grinders, drills
and hammering (particularly steel-on-steel) can generate annoyance but not
necessarily non-compliance, and should be managed appropriately. Precast
panels that face sensitive receivers should be erected first so that they act as
a barrier for works behind
• Hoists Electric hoists will be used to lift material during the superstructure phase.
These are not noisy items so have not been included in the model
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Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 84.0 KEY RECEIVERS
The closest key receivers are indicated in Figure 3 below. The worksite outline is shown in green,
addresses of residential receivers are shown in red text, and retail receivers in blue text.
Figure 3: Addresses of key receivers adjacent to the worksite (Residential – red , Retail – blue)
Tamaki Drive
32 Marau Cres is the closest residential receiver. The building is four storeys tall so shielding of noisy
sources will be difficult to this receiver. Most dwellings on the southern side of Marau Cres are multi-
storey also.
Receivers behind the ‘front line’ buildings shown above will generally benefit from shielding by those
buildings, although the topography does rise towards the south so upper levels may still have a view
of the worksite. These factors are accounted for in the SoundPLAN model.
5.0 CONSTRUCTION NOISE ASSESSMENT
The assessment has been carried out via noise predictions made using a SoundPLAN environmental
noise model. SoundPLAN is an industry-leading prediction software, as described below.
5.1 Noise Model
5.1.1 Modelled Scenarios
The SoundPLAN model has been used to generate three types of output:
• Façade noise map: A prediction of noise levels received at the closest façades of each
building facing the site – corrected to the assessment point of 1m from the façade by adding
2.5 dB. For multi-storied receivers, the noise level at each storey is predicted. A table of the
results is shown in Appendix B. Exceedances are shown in bold font
This document may not be reproduced in full or in part without the written consent of Marshall Day Acoustics Limited
Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 9• ‘Soundsplash’: A three-dimensional graphic that shows noise levels at different points across
a building façade, enabling a quantitative assessment for multi-level buildings. A figure for
each scenario, showing buildings to the south of the site, is shown in Appendix C. Note that
the roof colour represents the highest level received by a façade of that building, not the
level received by the roof itself.
• Grid noise map: A map (plan view) of the site and surrounding receivers, showing how noise
generated by the construction works filters through successive rows of buildings to shield
those behind. Note that contours are generated at a height of 1.5m. The maps are attached
in Appendix D
Three daytime scenarios have been modelled, and the three output types have been produced for
each scenario, as follows:
• Demolition and earthworks (machinery at ground level)
• Foundations (once the basement levels have been excavated and foundation work begins)
• Superstructure (the visible building above ground level)
The site will change during construction, as basement excavation takes place and as buildings are
demolished and built. The scenarios above have been designed to capture the site when sources are
at ground level, when they are below ground level in the excavated basement, benefiting from
improved shielding due to the pit edge and when they are above ground with no shielding (other
than from other buildings under construction).
5.1.2 Modelling Considerations
Construction noise levels at receivers around the site have been predicted using SoundPLAN, which
utilises the ISO 9613-2:1996 algorithm for outdoor sound propagation.
The model incorporates:
• Key construction noise sources and their location on the site
• Receivers surrounding the site (including lower and upper stories where applicable)
• Building objects (which provide shielding to receivers behind)
• Site topography
• Reflectivity of hard ground surfaces
• A 2.4m acoustic barrier along the perimeter of the site boundary (refer Section 5.5)
The modelled scenarios represent a worst-case situation when multiple items of equipment are all
operating at the same time. In reality, this would only occur for limited periods so actual noise levels
would typically be lower than predicted.
5.1.3 Modelling Limitations
There is a level of uncertainty in any noise model, and for construction activity there are numerous
additional variables and factors to consider.
These factors include variations in the specific models and individual items of equipment, the exact
location of each item, the variation in shielding from different areas of the site, idiosyncrasies of the
individual operators and the various receiving environments such as the locations of bedrooms in
houses, the opening or closing of windows and the sleeping patterns of the residents.
This document may not be reproduced in full or in part without the written consent of Marshall Day Acoustics Limited
Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 105.2 Noise Sources
Sound level data of the noise sources listed in Table 4 have been obtained from New Zealand
Standard NZS 6803: 1999 “Acoustics - Construction Noise” and previous MDA noise assessments.
Table 5 below lists the anticipated noise levels from each item of equipment included in the
SoundPLAN model. The noise levels in the table do not include any shielding or other mitigation.
Table 5: Construction Equipment and Noise Levels
Typical Operating Noise Level LAeq (dB)
Equipment
Sound Power Level (dB) @ 10 m @ 20 m @ 50 m @ 100 m
Excavator (40T) 107 82 76 67 59
Secant piling rig 111 86 80 71 63
Bored piling rig 103 78 72 63 55
Concrete drill (electric
104 79 73 64 56
percussion)
Grinder (and other handtools) 108 83 77 68 60
Structural anchor drill
105 80 74 65 57
(directional drill)
Concrete pump discharging 103 78 72 63 55
Generator 93 68 62 53 45
Compressor 93 68 62 53 45
Truck idling 91 66 60 51 43
5.3 Predicted Noise Levels
5.3.1 Demolition and Earthworks stages
Demolition and earthworks are predicted to comply with the noise limit of 70 dB LAeq at the majority
of receivers except for:
• 25, 27, 27A, 29, 31, 32 and 33A Marau Cres
• 2, 12A and 12B Ronaki Road
• 99 Tamaki Road (retail)
The noise limit is predicted to be exceeded by up to 15 decibels at the upper floors of 32 Marau Cres.
Exceedance for other receivers is predicted to be between 1 – 3 decibels, which in general would not
be noticeably louder than a compliant level of 70 dB LAeq.
The demolition and earthworks phases are predicted to generate the highest noise levels at all
nearby receivers because they incorporate the most items of large equipment (such as the
excavators and secant piling rig) in operation. These are predicted to be the worse-case levels of the
whole Project. As excavation progresses, the equipment would operate within the newly formed pit
where the pit-wall itself would provide some additional mitigation to all nearby receivers.
Given that the predictions are representative of a worst-case situation, it is considered that
compliance can generally be achieved or marginally exceeded (by 1 – 2 decibels) during this phase at
all nearby receivers except 32 Marau Cres.
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Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 115.3.2 Foundations stage
Foundation works are predicted to readily comply with the 70 dB LAeq daytime criterion at all nearby
receivers except for the first to third floor façades of 32 Marau Cres.
The highest noise level, from secant piling, is predicted to be 75 dB LAeq which exceeds the 70 dB LAeq
criterion by 5 decibels. Secant piling is scheduled to occur for two one-week periods only. At other
times, works during this stage are predicted to comply and will reduce further as work moves to the
north and west of the site.
5.3.3 Superstructure stage
Exceedances during some phases of the superstructure construction are predicted at 25, 27, 29, 31,
32 Marau Cres.
The range of exceedances is predicted to be between 1 to 10 decibels. The receiver with the highest
noise level is the top floor of 32 Marau Cres and the other receivers only exceed by approximately 1 –
2 decibels.
Note that the predictions are representative of works on an exposed superstructure. As precast walls
are erected, works that would occur within would eventually be closed off and shielded from the
nearby receivers so that the noise levels received would reduce. It is noted that the eastern and
southern blocks are to be constructed first and these will provide shielding for residents to the east
and south.
Therefore, works early in this phase may cause exceedances, but in general it would be a
comparatively quiet phase of the Project.
5.3.4 Discussion
Compliance is generally predicted for all nearby receivers except for the 32 Marau Cres and some
properties of the first two rows to the south across the Marau Cres.
32 Marau Cres is predicted to receive high noise levels during all noted phases of construction, but
particularly during the initial demolition and earthworks phase where large equipment is being
utilised. This is due to the close proximity of this building to the construction site boundary and its
multi-storied construction which, for the elevated apartments, renders boundary mitigation
ineffective as the receivers would be able to see directly into the construction site.
Where practicable, localised acoustic barriers should be utilised (such as around concrete drilling) to
provide additional mitigation, as per the CNVMP.
MDA recommends that the nearby receivers are communicated with during all phases of the
construction so that they are aware of the proposed works and its duration. Consultation with
32 Marau Cres, particularly for those residents who overlook the site, is essential in order to
understand their sensitivities and to collaboratively devise mitigation plans. For example, an effective
mitigation option would be to time piling works at a time when the residents are not home.
5.4 Trucks on Patteson Avenue
Assessing noise from construction trucks as they drive on local roads to and from a worksite is not
common. Heavy vehicles can use the road as of right, and there are many factors that could affect
the percentage of heavy vehicles using any road.
However, for this Project it was considered pragmatic to carry out such an assessment because of the
high number of residential receivers in Patteson Ave.
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Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 12The average number of vehicles currently travelling on Patteson Ave is 5881 per day5. Of this
number, 2.4% is heavy vehicles.
During the construction phase, it is understood that 20 trucks per day are expected to service the
worksite via Patteson Ave. In the context of the current vehicle numbers, this equates to 2.7% heavy
vehicles during construction.
Using the accepted Calculation of Road Traffic Noise (CoRTN) method adopted by the NZ Transport
Agency, the increase in road traffic noise on Patteson Ave due to construction trucks is predicted to
be 0.2 dB LAeq(24 hours). An increase of 0.2 decibels would be unnoticeable in terms of average daily
noise level, which is the accepted descriptor for road noise.
5.5 Acoustic Barriers
A 2.4 metre site hoarding is recommended around the site perimeter. This will provide useful
shielding for the majority of surrounding receivers. Effective noise barriers typically reduce the
received noise level by up to 10 decibels. The panels should be constructed from materials with a
minimum surface mass of 10 kg/m2, such as 18mm plywood or 20 mm pine. There must be no gaps
between panels nor under the barrier (other than gates for access).
In addition to the site hoarding, where practicable, temporary noise barriers should be used on site
close to noisy machinery, as follows:
• The panels should be constructed from materials with a minimum surface mass of 6.5 kg/m2.
Suitable panels include 12 mm plywood or the following proprietary ‘noise curtains’:
- Duraflex ‘Noise Control Barrier - Performance Series’ (www.duraflex.co.nz)
- Soundex ‘Acoustic Curtain - Performance Series' (www.ultimate-solutions.co.nz)
- Flexshield ‘Sonic Curtain with 4 kg/m2 mass loaded vinyl backing’ (www.flexshield.co.nz)
- Alternatives should be approved by a suitably qualified acoustic specialist
• The panels should be abutted or overlapped to provide a continuous screen without gaps at the
bottom or sides of the panels
• The panels should be at least 2m high and positioned as close as practicable to the noisy
construction activity to block line-of-sight between the activity and any sensitive receivers
6.0 CONSTRUCTION VIBRATION ASSESSMENT
None of the proposed machinery outlined in Section 3.0 is considered to be ‘high vibration’. Secant
piling will take place within approximately 3 metres of 32 Marau Cres, however at this distance the
vibration level is predicted to be around 1.5 – 2 mm/s PPV. This complies with both the cosmetic
damage and amenity vibration controls.
Drilling does produce vibration, but at a high-frequency that does not pose a damage risk to
buildings. The noise generated by this activity is more likely to cause annoyance than the vibration.
Excavators can produce vibration in various ways e.g. dropping heavy objects, running over ledges,
snagging submerged items etc. It is not practicable to predict the frequency of occurrence or
vibration level generated from these events because there are a number of variables that are not
possible to accurately account for. They can, however, be minimised or avoided through active site
management and considerate use of equipment. These mitigation measures are covered by the
CNVMP.
5
Reference: Auckland Transport Traffic Count data “traffic-count-jul-2012-feb-2018.xlsx”. Count made in 2015 and has
been increased by 9% (3% per year, non-compounding) to estimate 2018 traffic flow.
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Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 137.0 RECOMMENDED CONDITIONS
MDA recommends the following conditions be applied to any consent granted, for the purposes of
construction noise and vibration management:
Noise and Vibration
1) The hours of construction shall be 6.30am – 8.00pm Monday – Friday and 7.30am – 6pm on
Saturday. Site activities can occur outside these times, provided they comply with the relevant
noise levels in Condition 2.
Construction Noise
2) Noise arising from construction activities shall be measured and assessed in accordance with
New Zealand Standard NZS 6803:1999 “Acoustics – Construction Noise” and shall comply with
the noise limits set out in the following tables:
Construction noise levels for activities sensitive to noise (as defined in Chapter J of the Auckland Unitary
Plan – Operative in Part)
Time of week Time period Maximum noise level (dB)
LAeq LAFmax
Weekdays 6:30am - 7:30am 55 70
7:30am - 6:00pm 70 85
6:00pm - 8:00pm 65 80
8:00pm - 6:30am 40 70
Saturdays 6:30am - 7:30am 40 70
7:30am - 6:00pm 70 85
6:00pm - 8:00pm 40 70
8:00pm - 6:30am 40 70
Sundays and public 6:30am - 7:30am 40 70
holidays 7:30am - 6:00pm 50 80
6:00pm - 8:00pm 40 70
8:00pm - 6:30am 40 70
Construction noise levels for other occupied buildings
Time period Maximum LAeq noise level (dB)
7:30am - 6:30pm 70
6:30pm - 7:30am 75
Construction Vibration
3) Vibration arising from construction activities (including blasting) shall comply with the cosmetic
vibration limits set out in German Standard DIN 4150-3:1999 “Structural Vibration - Effects of
Vibration on Structures” when measured and assessed according to that Standard on any
structure not on the construction site
Construction Noise and Vibration Management Plan
4) In the event that any of the noise and vibration limits in Conditions 2 – 3 cannot be practicably
complied with, the applicant must submit a Construction Noise and Vibration Management Plan
(CNVMP) to Auckland Council’s Team Manager – Consents for certification. The CNVMP must be
implemented and maintained throughout the construction period
This document may not be reproduced in full or in part without the written consent of Marshall Day Acoustics Limited
Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 145) The CNVMP must refer to the management measures set out in Annexure E of New Zealand
Standard NZS 6803:1999 “Acoustics – Construction Noise” and must, as a minimum, address:
a. Construction sequencing
b. Machinery and equipment to be used
c. Hours of operation, including times and days when noisy construction work will
occur
d. The design of noise mitigation measures such as temporary barriers or enclosures, as
required to satisfy the best practicable option (BPO)
e. Development of alternative strategies where full compliance with Conditions 2 – 3
cannot be practicably achieved, including consultation with residents and other
occupiers to achieve acceptance outcomes
f. Methods for monitoring and reporting on construction noise and vibration
g. Communication strategies for keeping stakeholders informed about the timing and
duration of works
h. Methods for receiving and responding to complaints about construction noise and
vibration, including a hotline phone number to which complaints are to be directed
8.0 CONCLUSION
Marshall Day Acoustics has carried out an assessment of construction noise and vibration associated
with the proposed MB development site in Mission Bay.
In general, construction noise is predicted to comply with the relevant limits at most receivers in the
neighbourhood but has the potential to exceed at times for residential receivers to the south and
south-east of the site, and to one retail receiver to the north-east. Exceedances are generally
predicted to be no more than 3 decibels – and will for the most part be less because the prediction
model is conservative.
However, exceedances at the apartment at 32 Marau Road (directly south-east of the site) are
predicted to be as high as 15 decibels during the demolition and earthworks phase. The exceedance
risk is highest when the identified high-noise machinery operates close to its façade. This will, as a
proportion of the overall construction period, occur infrequently but must be managed when it does.
Vibration levels are predicted to comply with the relevant performance standards.
Therefore, it is recommended that the developer seek consent to infringe AUP-OIP rule E25.6.27
(construction noise), which will change the status of the construction noise activity to Restricted
Discretionary.
Notwithstanding the potential for non-compliance at times, it is considered that construction
activities can be managed to a reasonable level by implementing the proposed consent conditions –
in particular a construction noise and vibration management plan (CNVMP), a draft of which is
submitted with the consent application. This will also satisfy the AUP-OIP assessment criteria for
Restricted Discretionary activities in Rule E25.8.2 of the AUP-OIP.
A critical part of the CNVMP is communication with neighbours, and it recommends protocols to
support good working relationships throughout the construction period.
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Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 15APPENDIX A GLOSSARY
A-weighting The process by which noise levels are corrected to account for the non-linear
frequency response of the human ear.
dB Decibel
The unit of sound level.
Expressed as a logarithmic ratio of sound pressure P relative to a reference pressure
of Pr=20 Pa i.e. dB = 20 x log(P/Pr)
dBA The unit of sound level which has its frequency characteristics modified by a filter (A-
weighted) so as to more closely approximate the frequency bias of the human ear.
LAeq (t) The equivalent continuous (time-averaged) A-weighted sound level. This is
commonly referred to as the average noise level.
The suffix "t" represents the time period to which the noise level relates, e.g. (8 h)
would represent a period of 8 hours, (15 min) would represent a period of 15
minutes and (2200-0700) would represent a measurement time between 10 pm and
7 am.
LAmax The A-weighted maximum noise level. The highest noise level which occurs during
the measurement period.
Noise A sound that is unwanted by, or distracting to, the receiver.
NZS 6801:2008 New Zealand Standard NZS 6801:2008 “Acoustics – Measurement of environmental
sound”
NZS 6802:2008 New Zealand Standard NZS 6802:2008 “Acoustics – Environmental Noise”
NZS 6803:1999 New Zealand Standard NZS 6803: 1999 “Acoustics - Construction Noise”
SPL or LP Sound Pressure Level
A logarithmic ratio of a sound pressure measured at distance, relative to the
threshold of hearing (20 µPa RMS) and expressed in decibels.
SWL or LW Sound Power Level
A logarithmic ratio of the acoustic power output of a source relative to 10-12 watts
and expressed in decibels. Sound power level is calculated from measured sound
pressure levels and represents the level of total sound power radiated by a sound
source.
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Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 16APPENDIX B PREDICTED FAÇADE NOISE LEVELS
Receiver Floor Predicted Façade Noise Level (dB LAeq), by construction phase
Demolition and Foundation Structure
Earthworks
Marau Crescent 032 2.FL 85 74 80
Marau Crescent 032 1.FL 84 73 79
Marau Crescent 032 3.FL 84 75 80
Marau Crescent 032 GF 81 70 76
Ronaki Road 012B 2.FL 73 62 69
Marau Crescent 027 2.FL 73 64 71
Marau Crescent 031 1.FL 73 64 71
Tamaki Drive 099 (retail) GF 73 62 67
Marau Crescent 029 1.FL 73 64 72
Marau Crescent 031 GF 73 63 71
Ronaki Road 012B 1.FL 73 62 69
Marau Crescent 029 GF 72 64 72
Marau Crescent 033A 2.FL 72 62 69
Ronaki Road 012A 2.FL 72 62 69
Marau Crescent 027 1.FL 72 63 71
Ronaki Road 012B GF 72 62 69
Marau Crescent 033A 1.FL 71 62 69
Ronaki Road 012A 1.FL 71 61 68
Marau Crescent 033A GF 71 60 68
Ronaki Road 002 2.FL 71 63 70
Marau Crescent 025 1.FL 71 63 72
Marau Crescent 027 GF 71 63 71
Marau Crescent 025 GF 70 62 72
Marau Crescent 027A 2.FL 70 61 68
Ronaki Road 012A GF 70 61 68
Patteson Avenue 009A GF 70 65 69
Patteson Avenue 009A 1.FL 70 66 70
Marau Crescent 035B 1.FL 70 58 65
Marau Crescent 027A 1.FL 70 60 68
Marau Crescent 037C 2.FL 69 58 65
Tamaki Drive 103 1.FL 69 60 64
Ronaki Road 002 GF 69 59 67
Ronaki Road 002 1.FL 69 60 70
Ronaki Road 006 2.FL 68 59 68
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Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 17Receiver Floor Predicted Façade Noise Level (dB LAeq), by construction phase
Demolition and Foundation Structure
Earthworks
Unichem (retail) GF 68 66 66
Marau Crescent 027A GF 68 58 67
Marau Crescent 035A 1.FL 68 59 66
Marau Crescent 035C 1.FL 68 57 65
Portofino (retail) 1.FL 68 67 65
Patteson Avenue 009 1.FL 68 66 66
Marau Crescent 035A GF 68 59 65
Ronaki Road 006 1.FL 68 59 66
Patteson Avenue 009 GF 68 65 66
Tamaki Drive 103 GF 68 59 64
Marau Crescent 037B 2.FL 68 58 64
Marau Crescent 037C 1.FL 68 58 64
Marau Crescent 037B GF 67 56 63
Marau Crescent 035 1.FL 67 58 65
Marau Crescent 037 2.FL 67 57 64
Marau Crescent 037C GF 67 56 64
Marau Crescent 037 1.FL 66 56 64
Marau Crescent 037B 1.FL 66 57 64
Marau Crescent 035 GF 66 56 63
Marau Crescent 037 GF 66 56 64
Tamaki Drive 105 2.FL 66 56 61
Ronaki Road 006 GF 65 56 63
Tamaki Drive 105 1.FL 65 54 61
Patteson Avenue 020 GF 65 54 65
Ronaki Road 012 1.FL 65 54 61
Ronaki Road 016 1.FL 65 54 61
Marau Crescent 015 GF 65 59 64
Marau Crescent 024B 2.FL 65 54 62
Marau Crescent 015 1.FL 65 60 65
Marau Crescent 039 3.FL 64 55 61
Marau Crescent 039 2.FL 64 54 61
Marau Crescent 024A 1.FL 64 55 61
Marau Crescent 039 1.FL 64 54 61
Ronaki Road 016 GF 64 53 59
Marau Crescent 024B 1.FL 64 53 60
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Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 18Receiver Floor Predicted Façade Noise Level (dB LAeq), by construction phase
Demolition and Foundation Structure
Earthworks
Marau Crescent 039 GF 63 54 61
Marau Crescent 024A GF 63 54 60
Ronaki Road 018 1.FL 63 53 60
Patteson Avenue 020 GF 63 54 62
Ronaki Road 020 1.FL 63 53 59
Ronaki Road 012 GF 62 52 60
Ronaki Road 018 GF 62 52 58
Ronaki Road 020 GF 61 51 58
Tamaki Drive 105 GF 61 51 57
Marau Crescent 024B GF 61 50 56
Ronaki Road 022 1.FL 60 50 56
Ronaki Road 022 GF 59 49 55
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Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 19APPENDIX C SOUNDSPLASHES This document may not be reproduced in full or in part without the written consent of Marshall Day Acoustics Limited Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 20
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APPENDIX D GRID NOISE MAPS This document may not be reproduced in full or in part without the written consent of Marshall Day Acoustics Limited Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 23
This document may not be reproduced in full or in part without the written consent of Marshall Day Acoustics Limited Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 24
This document may not be reproduced in full or in part without the written consent of Marshall Day Acoustics Limited Rp 003 R02 2016907 jaw 180501 Construction Assessment.docx 25
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