Acoustics Vibration Structural Dynamics Sydney Melbourne Brisbane Gold Coast Kuwait Renzo Tonin & Associates ABN 29 117 462 861 Level 1/418A Elizabeth St SURRY HILLS NSW 2010 | PO Box 877 STRAWBERRY HILLS NSW 2012 P (02) 8218 0500 F (02) 8218 0501 [email protected]www.renzotonin.com.au Sydney Metro Chatswood to Sydenham – TSE Works - Spoil Loading and Haulage 1 Introduction 1.1 Overview of works This technical memorandum is an addendum to the report Construction Noise and Vibration Impact Statement: Barangaroo Construction Site (Barangaroo CNVIS) and has been prepared on behalf of John Holland CPB Ghella Joint Venture (JHCPBG) in accordance with the Construction Noise and Vibration Management Plan (CNVMP) [SMCSWTSE-JCG-TPW-EM-PLN-002012] for the Design and Construction of the Tunnel and Station Excavation (TSE) Works of the Sydney Metro City & Southwest Project (the Project). Spoil is currently being transported from the Barangaroo site via a combination of truck and barge, with spoil unloaded directly on to trucks at Clyde. JHCPBG is proposing to modify the existing spoil removal operations through direct spoil haulage by road from the Barangaroo construction site. The proposed operations would occur during the standard daytime period, E2 evening period (8pm to 10pm) and night-time period (10pm to 7am), seven days per week. This memorandum has been prepared to address the potential construction noise and vibration impacts from the spoil loading and haulage activities. These works have been assessed in combination with other works occurring at the site, which have previously been assessed in the Barangaroo Construction Site CNVIS. The construction works are detailed in Section 2.1 below. 1.2 Justification for out of hours construction works Under EPL20971 L4.4 (a) and (b), tunnelling activities and tunnelling ancillary surface supports works and haulage and delivery of spoil and materials are permitted to occur 24/7. The Special Dictionary defines Tunnelling ancillary surface support works as: “surface works and activities that are required to be 25 November 2019 TH511-02 01.06.04 F03 BN CNVIS Add3 Spoil Haulage (r4) John Holland CPB Ghella JV Level 9, 50 Bridge Street, Sydney NSW 2000
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Sydney Metro Chatswood to Sydenham – TSE Works 01.06.04 F03... · SYDNEY METRO CHATSWOOD TO SYDENHAM – TSE WORKS SPOIL LOADING AND HAULAGE 2.3 Discussion of results 2.3.1 Day/E1
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Acoustics
Vibration
Structural Dynamics
Sydney Melbourne Brisbane Gold Coast Kuwait
Renzo Tonin & Associates ABN 29 117 462 861
Level 1/418A Elizabeth St SURRY HILLS NSW 2010 | PO Box 877 STRAWBERRY HILLS NSW 2012
P (02) 8218 0500 F (02) 8218 0501 [email protected] www.renzotonin.com.au
Sydney Metro Chatswood to Sydenham – TSE Works - Spoil Loading
and Haulage
1 Introduction
1.1 Overview of works
This technical memorandum is an addendum to the report Construction Noise and Vibration Impact
Statement: Barangaroo Construction Site (Barangaroo CNVIS) and has been prepared on behalf of John
Holland CPB Ghella Joint Venture (JHCPBG) in accordance with the Construction Noise and Vibration
Management Plan (CNVMP) [SMCSWTSE-JCG-TPW-EM-PLN-002012] for the Design and Construction of
the Tunnel and Station Excavation (TSE) Works of the Sydney Metro City & Southwest Project (the
Project).
Spoil is currently being transported from the Barangaroo site via a combination of truck and barge, with
spoil unloaded directly on to trucks at Clyde. JHCPBG is proposing to modify the existing spoil removal
operations through direct spoil haulage by road from the Barangaroo construction site. The proposed
operations would occur during the standard daytime period, E2 evening period (8pm to 10pm) and
night-time period (10pm to 7am), seven days per week.
This memorandum has been prepared to address the potential construction noise and vibration impacts
from the spoil loading and haulage activities. These works have been assessed in combination with
other works occurring at the site, which have previously been assessed in the Barangaroo Construction
Site CNVIS. The construction works are detailed in Section 2.1 below.
1.2 Justification for out of hours construction works
Under EPL20971 L4.4 (a) and (b), tunnelling activities and tunnelling ancillary surface supports works and
haulage and delivery of spoil and materials are permitted to occur 24/7. The Special Dictionary defines
Tunnelling ancillary surface support works as: “surface works and activities that are required to be
TH511-02 01.06.04 F03 BN CNVIS ADD3 SPOIL HAULAGE (R4) 5 SYDNEY METRO CHATSWOOD TO SYDENHAM – TSE WORKS
SPOIL LOADING AND HAULAGE
2.3 Discussion of results
2.3.1 Day/E1 (7am to 8pm)
From Table 2.2 above, the construction noise levels during the day period and predicted to be below the
PPA Condition E37 external equivalent NMLs at the nearest noise sensitive receivers for the spoil
haulage operations. Residential receivers on High Street, which were excepted to be above the PPA
Condition E37 external equivalent NMLs due to the Stage 5 operations, have been previously addressed
in the Barangaroo CNVIS (ref: TH511-02 01.06.04 F01 BN CNVIS (r15)).
2.3.2 Night/E2 (8pm to 7am)
From Table 2.3 above, the construction noise levels during the night period are predicted to comply with
the PPA Condition E41 external equivalent NMLs at the nearest noise sensitive receivers for the spoil
haulage and Stage 5 operations.
Based upon the noise monitoring of spoil loading into trucks undertaken by RTA, the highest LA,Max noise
levels associated with the spoil loading operations would be from the wheeled loader dumping the first
spoil load into the empty truck bed. The predicted LAmax noise levels associated these noise events could
exceed the sleep disturbance screening level at the nearest residential receivers, however they are
predicted to be well below the sleep disturbance ‘awakening reaction’ internal NML of 55 dB(A) LAmax.
Considering that the number of spoil loading operations at night (i.e. 8 trucks per hour per night) during
the night-time period and assuming 2-3 maximum noise events per truck, there could be up to 216
maximum noise level events above the sleep disturbance screening levels of 55dB(A) LA,Max at night.
Long-term noise monitoring was conducted at 26A High Street, Millers Point from 31st August 2015 to
14th September 2015 prior to the commencement of construction works (reference monitoring ID: B.12
from Chatswood to Sydenham Environmental Impact Statement, Technical paper 2: Noise and Vibration,
May 2016). The monitoring showed maximum noise levels ranging from 55 to 85 dB(A) LAmax at night. As
maximum noise levels associated with the spoil loading on site are predicted to be from 55 to 64 dB(A)
LAmax at the closest noise sensitive receivers along High Street, they are lower than what nearby residents
would have experienced prior to the commencement of TSE construction works at Barangaroo.
2.4 Noise mitigation and management
Based upon the assessment, there are no additional noise mitigation or management measures
applicable beyond those outlined in the Barangaroo CNVIS for the works reviewed in this technical
memorandum.
With regard to the loading of spoil into spoil trucks and the potential for sleep disturbance, noise
reductions can be achieved by carefully placing spoil into the truck, instead of dropping the material
from height. It should also be noted that given the high moisture content and ‘slurry’ consistency of the under harbour spoil this will significantly reduce noise levels during loading. Based on RT&A site
measurements, gentle placement of spoil material into an empty truck may further reduce
instantaneous noise levels by up to 10 dB(A).
RENZO TONIN & ASSOCIATES 25 NOVEMBER 2019
JOHN HOLLAND CPB GHELLA JV
TH511-02 01.06.04 F03 BN CNVIS ADD3 SPOIL HAULAGE (R4) 6 SYDNEY METRO CHATSWOOD TO SYDENHAM – TSE WORKS
SPOIL LOADING AND HAULAGE
2.4.1 Noise monitoring
Attended noise monitoring will be undertaken to verify that the construction activities are consistent
with the assessed noise modelling scenarios and that noise levels resulting from construction works are
not higher than the levels predicted in this memorandum or the relevant NMLs. Attended monitoring
on private property is subject to obtaining the property owner/occupier’s consent (where required).
Attended noise monitoring will be undertaken in the NCAs most impacted by the works. A minimum of
one representative receiver in each NCA is to be monitored. The nominated monitoring locations are
identified in Table 2.4, and have been selected as they present the best opportunity to validate the
Vibration Impact Statement Addendum: Barangaroo – Spoil Loading and Haulage
Document reference:
SYDNEY METRO CITY & SOUTHWEST-TSE WORKS Construction Noise and Vibration Impact Statement Addendum: Barangaroo Spoil Loading and Haulage TH511-02 01.06.04 F03 BN CNVIS Add3 Spoil Haulage (r4) Dated 25 November 2019
Prepared by: Larry Clark, Alternate Acoustic Advisor
Date of issue: 28 November 2019
As approved Alternate Acoustic Advisor for the Sydney Metro City & Southwest project, I have reviewed the Construction Noise and Vibration Impact Statement (CNVIS) Addendum for Barangaroo Spoil Loading and Haulage, as required under A27 (d) of the project approval conditions. The CNVIS Addendum covers the direct spoil haulage by road, 24 hr/day, 7 days/week from January to the end of March 2020. The Addendum supports the CNVIS: Barangaroo Construction site. I reviewed the Addendum; visited the site to understand the movement of heavy vehicle movements on and off the site; and clarified the night-time heavy vehicle projections for Hickson Road in relation to predicted traffic noise level changes. I am satisfied that truck movements associated with TBM retrieval would result in a negligible increase in spoil haulage traffic noise levels on Hickson Road. TSE confirmed, on 26 November 2019, that toolbox presentations and driver inductions will include the requirements of TSE’s Driver Code of Conduct. As stated in the CNVMP, TSE will:
• limit the use of engine compression brakes at night and in residential areas. • ensure vehicles are fitted with a maintained Original Equipment Manufacturer exhaust
silencer or a silencer that complies with the National Transport Commission's 'In-service test procedure' and standard.
I am satisfied that the CNVIS Addendum is technically valid and that it includes appropriate noise and vibration mitigation and management. On this basis I endorse the impact statement Addendum in relation to the documented retrieval of TBM components at the Barangaroo construction site.
Larry Clark, City & Southwest Alternate Acoustic Advisor