MELBOURNE METRO RAIL PROJECT ENVIRONMENT EFFECTS STATEMENT INQUIRY AND ADVISORY COMMITTEE

MMRA TECHNICAL NOTE

TECHNICAL NOTE NUMBER:

DATE:

PRECINCT:

EES/MAP BOOK REFERENCE:

SUBJECT:

NOTE:

058

20 September 2016

All Precincts

EES Chapter 13; Technical Appendix I: Noise and Vibration

SoundPLAN Noise Modelling for Airborne Construction Noise

1. During the cross-examination of Mr Fearnside by counsel for MMRA, a query arose about the SoundPLAN acoustic modelling which was undertaken for the assessment of airborne construction noise in the EES.

2. This Technical Note provides an explanation of the model, its application to structures that may be affected by airborne noise, and the mitigation responses.

) Model

3. SoundPLAN Environmental Software is a 3-dimensional noise modelling package offering a range of noise evaluation modules.

4. The ISO 9613 part 2 standard1 was the calculation methodology used for the prediction of the airborne construction noise levels within the SoundPLAN environment.

5. The acoustic model includes:

a. Topography;

b. Building Structures;

1 ISO 9613-2: 1996 Acoustics - Attenuation of sound during propagation - Part 2: General method of calculation.

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c. Noise sources;

d. Noise sensitive receivers; and

e. Ground absorption.

6. The noise sources can be modelled as point sources, line sources and / or area sources.

7. The noise sources included in the acoustic model have been based upon their octave band sound power levels and relevant directivity.

8. The construction source noise levels used in the acoustic model are from DEFRA's Update of Noise Database for Prediction of Noise on Construction and Open Sites2 (DEFRA) and the AJM construction noise database. The DEFRA sound level data are based on actual field measurements on construction sites. However, it should be noted that noise levels associated with a spoil truck is very dependent on what the spoil truck is doing (e.g. driving past at speed, dumping material etc). The spoil trucks in the AJMJV model are on-site and are either idling or moving slowly.

9. Buildings included in the SoundPLAN model for all precincts, other than the Eastern Portal Precinct and the Western Turnback, were from the shapefile City of Melbourne Building Footprints prepared by the City of Melbourne. A shapefile is a file format that stores geometric information and assigns attributes to it (similar to a dxt) . It is a file format that can be imported into SoundPlan.

10. The City of Melbourne shapefile presents a dataset of all of buildings (along with information assigned to each building) within the City of Melbourne council extents. The information assigned to each building included the building footprint, building heights, number of floors and addresses. This information was extracted from the dataset for our investigation.

11. For the Eastern Portal Precinct and the Western Turnback, the buildings were based on information derived by AJMJV from site visits and google maps (including street view).

12. As far as practicable, all existing buildings in the vicinity of the Melbourne Metro construction sites were included in the acoustic model. An example for CBD South Station from the AJMJV SoundPLAN model is provided in Figure 1 below. The grey objects are buildings and the yellow stars are receiver points which clearly extend up the building.

2 Department of Environment, Food and Rural Affairs, Update of Noise Database for Prediction of Noise on Construction and Open Sites, 2005

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Figure 1: AJMJV SoundPLAN model - CBD South Station

Predictions

13. The construction scenarios modelled by the AJMJV were provided by MMRA's constructability advisor. The modelled construction scenarios were selected to represent a range of typical construction scenarios. These were used to identify if practicable mitigations could be applied to meet the relevant Guideline Noise Levels.

14. Practicable mitigation was also identified and modelled to inform the assessment of construction noise for situations where Guideline Noise Levels did not necessarily apply.

15. Conservative assumptions were applied for the acoustic predictions, including:

a. atmospheric conditions which favor the propagation of sound; and

b. all construction equipment is operating continuously and simultaneously. This is a worst case situation and unlikely to happen in practice.

16. Airborne noise levels were predicted at all levels of the facades of relevant buildings (for both construction and operation). See examples in Attachment A of:

(i) Predicted noise levels at the Westin fa~ade (CBD South Station Precinct) for scenario of cavern construction with acoustic construction sheds

(ii) Predicted noise levels for Parkville Station Precinct for scenario of construction of access across Royal Parade with acoustic construction sheds

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(iii) Predicted noise levels for Domain Station Precinct for scenario of site operations with full construction sheds

17. Noise contours were presented in the Appendix A of EES Technical Appendix I at 1.5 m above the ground.

18. Noise levels were predicted for scenarios without additional mitigation and for those with additional mitigation.

19. Multiple reflection paths have been included in calculation settings (run properties) within SoundPLAN.

Mitigation

20. Mitigations have been evaluated in the SoundPLAN modelling to assess possible ways in which the Environmental Performance Requirements could be met.

21. In areas with high rise buildings typical of many of the precincts, the noise mitigation which has been modelled and recommended is the use of acoustic construction sheds.

2 2. This can be seen in:

a. Arden Station Precinct: An acoustic construction shed along with an extensive noise barrier have been evaluated.

b. Parkville Precinct: An acoustic construction shed and extensive noise barriers have been evaluated.

c. CBD North Precinct: Acoustic construction sheds have been evaluated.

d. CBD South Precinct: Acoustic construction sheds have been evaluated.

e. Domain Station Precinct: Acoustic construction sheds and noise barriers have been evaluated.

23. The locations where noise barriers for construction have been considered are:

a. Western Portal Precinct: mostly single or double-storey dwellings, all work is during normal working hours except if it is Unavoidable Work (and as much as possible the noisy activities would be undertaken during the daytime) and Guideline Noise Levels do not therefore apply. Regardless, extensive barriers up to 6m in height have been modelled as an appropriate mitigation response. Due to the construction being proposed in an operating railway environment it would not be appropriate to install acoustic construction sheds in this area.

b. Arden Station Precinct: An extensive barrier up to a height of 6m has been modelled as an appropriate mitigation response. In this area there is a mix of single and multi-storey dwellings, and the modelled

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barrier is predicted to be effective for some buildings. Two buildings have been identified where there is a risk that the requirement of inaudibility may not be achieved on Level 2/3. Building mitigation has been recommended as a mitigation measure at this location.

c. Parkville Station Precinct: This precinct includes a range of building types and uses including multi-storey. Both barriers and enclosures have been assessed as an effective and practicable mitigation.

d. Domain Station Precinct: This precinct includes multi-storey high rise buildings, which is why acoustic construction sheds have been evaluated. In addition to this, extensive noise barriers have been modelled as a means to reduce the noise levels at Melbourne Grammar School and also in the precinct generally.

e. Eastern Portal Precinct: This precinct includes a combination of single and multi-storey dwellings. Barriers up to 6m in height have been modelled as a means to reduce noise levels at receivers in this precinct. Due to the construction being proposed in an operating railway environment it would not be appropriate to install acoustic construction sheds in this area.

f. Western Turn back: This precinct consists of mostly single dwellings and the occasional double-storey dwelling. All construction work in this area would be undertaken during normal working hours except it it is Unavoidable Work (rail occupation). Guideline Noise Levels do not therefore apply, although barriers up to 2.Sm in height have been modelled as a means to reduce noise levels at receivers in this precinct. Due to the nature of the work being undertaken in an operating railway environment, acoustic construction sheds would be impractical in this area.

CORRESPONDENCE

) No correspondence.

ATTACHMENTS:

Predicted noise levels at:

A. the Westin fac;ade (CBD South Station Precinct) for scenario of cavern construction with acoustic construction sheds

B. Parkville Station Precinct for scenario of construction of access across Royal Parade with acoustic construction sheds

C. Domain Station Precinct for scenario of site operations with full construction sheds

Results presented include fac;ade reflection.

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A. Predicted noise levels for the Westin fa~ade (CBD South Station Precinct) for scenario of cavern construction with acoustic construction sheds

CBD South Scenario C (ii) (Vestin) ~~ Receiver Obj.-No. Fl rD dB(A) 99-209 Collins Street MELBOURNE VIC 3 259 F1 37

~ ~ \ 99-209 Collins Street MELBOURNE VIC 3 259 GF 37 99-209 Collins Street MELBOURNE VIC 3 833 F1 37 99-209 Collins Street MELBOURNE VIC 3 833 GF 36 99-209 Collins Street MELBOURNE VIC 3 259 F2 36 99-209 Collins Street MELBOURNE VIC 3 834 Ft 36 99-209 Collins Street MELBOURNE VIC 3 834 GF 36 99-209 Collins Street MELBOURNE VIC 3 259 F3 36 99-209 Collins Street MELBOURNE VIC 3 833 F2 36 99-209 Collins Street MELBOURNE VIC 3 834 F2 35 99-209 Collins Street MELBOURNE VIC 3 833 F3 35 99-209 Collins Street MELBOURNE VIC 3 834 F3 35 99-209 Collins Street MELBOURNE VIC 3 259 F4 35 99-209 Collins Street MELBOURNE VIC 3 834 F4 34 99-209 Collins Street MELBOURNE VIC 3 833 F4 34 99-209 Collins Street MELBOURNE VIC 3 259 F5 34 99-209 Collins Street MELBOURNE VIC 3 260 F1 34 99-209 Collins Street MELBOURNE VIC 3 260 GF 34 99-209 Collins Street MELBOURNE VIC 3 834 F5 33 99-209 Collins Street MELBOURNE VIC 3 260 F2 33 99-209 Collins Street MELBOURNE VIC 3 259 F6 33 99-209 Collins Street MELBOURNE VIC 3 833 F5 33 99-209 Collins Street MELBOURNE VIC 3 260 F3 33 99-209 Collins Street MELBOURNE VIC 3 834 F6 33 99-209 Collins Street MELBOURNE VIC 3 259 F7 33 99-209 Collins Street MELBOURNE VIC 3 833 F6 33 99-209 Collins Street MELBOURNE VIC 3 260 F4 33 99-209 Collins Street MELBOURNE VIC 3 834 F7 33 99-209 Collins Street MELBOURNE VIC 3 259 F8 32 • 99-209 Collins Street MELBOURNE VIC 3 834 F8 32 • 99-209 Collins Street MELBOURNE VIC 3 833 F7 32 99-209 Collins Street MELBOURNE VIC 3 260 F5 32 99-209 Collins Street MELBOURNE VIC 3 259 F9 32 99-209 Collins Street MELBOURNE VIC 3 834 F9 32 99-209 Collins Street MELBOURNE VIC 3 833 FS 32 99-209 Collins Street MELBOURNE VIC 3 260 F6 32 99-209 Collins Street MELBOURNE VIC 3 259 F10 31 99-209 Collins Street MELBOURNE VIC 3 834 F10 31 99-209 Collins Street MELBOURNE VIC 3 833 F9 31 99-209 Collins Street MELBOURNE VIC 3 260 F7 31 99-209 Collins Street MELBOURNE VIC 3 259 F 11 31 99-209 Collins Street MELBOURNE VIC 3 834 F11 31 99-209 Collins Street MELBOURNE VIC 3 833 F10 31 99-209 Collins Street MELBOURNE VIC 3 260 F8 31 99-209 Collins Street MELBOURNE VIC 3 259 F12 31 99-209 Collins Street MELBOURNE VIC 3 834 F12 31 99-209 Collins Street MELBOURNE VIC 3 260 F9 30 99-209 Collins Street MELBOURNE VIC 3 833 F11 30

CBD South Scenario C (ii) (Vestin) Receiver Obj.-No. Fl rD dB(A) Receiver Obj.-No. Fl rD dB(A) 199-209 Collins Street MELBOURNE VIC 3 835 F7 17

99-209 Collins Street MELBOURNE VIC 3 259 F13 30 199-209 Collins Street MELBOURNE VIC 3 835 F6 17 99-209 Collins Street MELBOURNE VIC 3 834 F13 30 199-209 Collins Street MELBOURNE VIC 3 835 F8 17 99-209 Collins Street MELBOURNE VIC 3 260 F10 30 199-209 Collins Street MELBOURNE VIC 3 835 F5 17 99-209 Collins Street MELBOURNE VIC 3 833 F12 30 199-209 Collins Street MELBOURNE VIC 3 835 F4 17 99-209 Collins Street MELBOURNE VIC 3 259 F14 30 199-209 Collins Street MELBOURNE VIC 3 835 F3 17 99-209 Collins Street MELBOURNE VIC 3 834 F14 30 199-209 Collins Street MELBOURNE VIC 3 835 F9 17 99-209 Collins Street MELBOURNE VIC 3 260 F 11 30 199-209 Collins Street MELBOURNE VIC 3 835 F2 17 99-209 Collins Street MELBOURNE VIC 3 259 F15 30 199-209 Collins Street MELBOURNE VIC 3 835 F10 17 99-209 Collins Street MELBOURNE VIC 3 833 F 13 30 199-209 Collins Street MELBOURNE VIC 3 835 F11 17

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C. Predicted noise levels for Domain Station Precinct for scenario of site operations with full construction sheds

Domain Constructio n Sce na rio C Endosed Sheds Rece:ive r Obj.-No. F1I LrN dB(AJ

398 St. Ki Ida Road M ELBOURN E 3 000 50 5 GF 34 .$" " 398 St. Ki Ida Road MELBOURNE 3 000 50 5 F l 3S

398 St. Ki Ida Road M ELBOU RNE 3 000 50 5 F 2 3 S <?"' 398 St. Kilda Ro ad M ELBOURNE 3 000 S0 5 F3 3 S

398 St. Ki Ida Road M ELBOU RNE 3 000 sos F 4 3 S

398 St. Ki Ida Road M ELBOU RNE 3000 S0 5 F5 36

398 St. Ki Ida Ro ad M ELBOU RNE 3 000 sos F6 3 6

398 St. Kilda Road M ELBO URNE 3000 S05 F 7 35

398 St. Ki Id a Road M ELBOU RNE 3000 S04 GF 42

398 St. Kild a Ro ad M ELBOU RNE 3000 S04 F l 43

398 St. Kilda Road MELBOURNE 3000 504 F 2 43 < 398 St. Ki Ida Road M ELBOURNE 3000 504 F 3 42 .:f 398 St. Ki Ida Road M ELBOURNE 3000 S04 F 4. 43 l 398 St. Ki Id a Road M ELBO URNE 3000 S04 FS 42 398 St. Kild a Road M ELBOURNE 3000 S04 F6 42

398 St. Ki Id a Road M ELBOURNE 3000 S04 F 7 42 39 8 St. Ki Id a Road M ELBOURNE 3000 S0 6 GF 33

39 8 St. Ki Id a Road M ELBOURNE 3000 S06 Fl 33

39 8 St. Ki Id a Road M ELBOURNE 3000 S06 F2 3 4

39 8 St. Ki Id a Road M ELBOURNE 3000 S0 6 F3 3 4

39 8 St. Ki Id a Road M ELBOURNE 3000 506 F 4 34

398 St. Ki Id a Ro ad M ELBOURNE 3000 50 6 F 5 3 5

398 St. Ki Id a Road M ELBOURNE 3000 506 F6 3 5

398 St. Ki Id a Road M ELBOURNE 3000 50 6 F7 3 5

39 8 St. Ki Id a Road M ELBOURN E 3000 418 GF 39

/ 398 St. Ki Id a Road M ELBOU RN E 3000 418 Fl 39

) 398 St. Ki Ida Road MELBOU RNE 3000 418 F2 3 9

398 St. Ki Ida Road M ELBOURNE 3000 418 F3 39

39 8 St. Ki Ida Road MELBOU RNE 3000 418 F4 40

398 St. Ki Ida Road M ELBOURN E 3000 418 F S 39

398 St. Ki Ida Road M ELBOURN E 3000 418 F6 39

398 St. Ki Ida Road M ELBOURNE 3000 418 F 7 3 8

398 St. Ki Ida Road M ELBOURN E 3000 417 GF 44

398 St. Ki Ida Road M ELBOURNE 3000 417 F l 44

398 St. Ki Ida Road MELBOURN E 3000 41 7 F2 44

3 98 St. Ki Ida Road M ELBOURNE 3000 4 17 F3 44

398 St. Ki Ida Road M ELBOURN E 3000 417 F 4 44

398 St. Ki Id a Road M ELBOURN E 3000 417 F 5 4 3

39 8 St. Ki Ida Road M ELBOURN E 3000 417 F6 43

398 St. Ki Id a Road M ELBOURN E 3 000 417 F 7 4 2