Contract No: HY/2019/18

 

Wanchai Development Phase II and Central Wanchai Bypass

Sampling, Field Measurement and Testing Works (Stage 4)

 

Environmental Permit no. EP-356/2009,

Further Evironmental permit nos. FEP-01/356/2009,  FEP-02/356/2009, FEP-03/356/2009, Fep-04/356/2009,  FEP-05/356/2009,  FEP-06/356/2009, FEP-07/356/2009 and  FEP-08/356/2009

 

Final environmental monitoring & audit report


CLIENTS:

PREPARED BY:

 

 

Civil Engineering and Development

Department

 

and

 

Highways Department

 

Lam Geotechnics Limited

 

19/F, Remex Centre

42 Wong Chuk Hang Road,

H.K.

 

Telephone: (852) 2882-3939

Facsimile: (852) 2882-3331

E-mail: info@lamenviro.com

Website: http://www.lamenviro.com

 

 

 

 

 

Certified by:



 

 

 

 

 

                                                    

Raymond Dai

Environmental Team Leader

 

 

 

DATE: 221 Apr 2022

 

 

 

 

 


Table of contents

 

1  Introduction.. 97

1.1       Scope of the Report 97

1.2       Structure of the Report 97

2  Project Background.. 108

2.1       Background. 108

2.2       Scope of the Project and Site Description. 108

2.3       Division of the Project Responsibility. 119

2.4       Major construction works undertaken during the course of the Project 1210

2.5       Project Organization and Contact Personnel 1210

3  Monitoring Requirements. 1412

3.1       Noise Monitoring. 1412

3.2       Air Quality Monitoring. 1513

3.3       Water Quality Monitoring. 1917

4.  Monitoring Results. 2321

4.1       Noise Monitoring Results. 2321

4.2       Air Quality Monitoring and Odour Patrol Results. 2624

4.3       Water Quality Monitoring, Enhance Water Quality Monitoring and Suspended Solids and Turbidity Monitoring during Dredging. 2826

4.4       Waste Monitoring Results. 4442

5.     Environmental Site Audit. 4846

6.  Complaints, Notification of Summons and Prosecution.. 4947

7.  Comments, Conclusions and Recommendations. 5048

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

lIST OF FIGUREs

 

Figure 2.1     Project Layout

 

Figure 2.2         Project Organization Chart

Figure 3.1    Locations of Environmental Monitoring Stations

 

 

 

lIST OF APPENDIces

 

Appendix 3.1    Action and Limit Level

Appendix 4.1    Event Action Plans

Appendix 4.2    Noise Monitoring Graphical Presentations

Appendix 4.3    Continuous Noise Monitoring Graphical Presentations

Appendix 4.4    Air Quality Monitoring Graphical Presentations

Appendix 4.5    Water Quality Monitoring Graphical Presentations

Appendix 5.1    Environmental Mitigation Implementation Schedule

Appendix 6.1    Complaint Log

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EXECUTIVE SUMMARY

        i.         This is the Final Environmental Monitoring and Audit (EM&A) Review Report prepared by Lam Geotechnics Limited for Wan Chai Development Phase II and Central-Wan Baypass íV Sampling, Field Measurement and Testing work under EM&A manual Section 10.5 specific for Environmental Permit no. EP-356/2009. This report presents the environmental monitoring and audit findings during the period of March 2010 to April 2022.

 

Major construction works under taken during construction phase monitoring programme

       ii.         The designated project work III (DP3) was awarded to China Harbour íV CRBC JV (Contract HY/2009/11) as part of the Project works by the Highways Department (HyD). The Further Environmental Permit FEP-01/356/2009 was issued on 18 February 2010 and surrendered on 22 October 2012. The construction site was handed over to Contract no. HY/2009/19 on 31 December 2011. The major construction activities of Contract no. HY/2009/19 under EP-356/2009 were marine piling works, box culvert construction and seawall reinstatement.  According to CWB RSS confirmation, HY/2009/19 works under EP-356/2009 was completed on 09 July 2019.

      iii.         The designated project work III (DP3) and VI (DP6) were awarded to Chun Wo íV Leader JV (Contract HK/2009/01) as part of the Project works by the Civil Engineering and Development Department (CEDD). The Further Environmental Permit FEP-02/356/2009 was issued on 24 March 2010 and surrendered on 19 April 2018.

      iv.         The designated project work III (DP3) and V (DP5) were awarded to Chun Wo íV CRGL JV (Contract HK/2009/02) as part of the Project works by CEDD. The Further Environmental Permit FEP-03/356/2009 was issued on 24 March 2010 and surrendered on 27 March 2020.

       v.         The designated project work III (DP3) was awarded to China State Construction Engineering (HK) Ltd (Contract HY/2009/15) as part of the Project works by HyD. The Further Environmental Permit FEP-04/356/2009 was issued on 22 November 2010 and surrendered on 12 May 2021.

      vi.         The designated project work III (DP3) was awarded to Gammon íV Leader JV (Contract HK/2010/06) as part of the Project works by CEDD. The Further Environmental Permit FEP-05/356/2009 was issued on 24 March 2011and surrendered on 03 October 2014.

     vii.         The designated project work III (DP3) was awarded to China State íV Leader JV (Contract HK/2012/08) as part of the Project works by CEDD. The Further Environmental Permit FEP-06/356/2009 was issued on 05 March 2013. Contractor China State íV Leader JV of Contract HK/2012/08 later renamed as China State íV Build King JV. The Further Environmental Permit FEP-08/356/2009 was issued on 1 August 2016 for China State íV Build King JV. The Further Environmental Permits FEP-06/356/2009 and FEP-08/356/2009 were surrendered on 15 October 2019.

    viii.         The designated project work III (DP3) was awarded to China State (Contract HY/2010/08) as part of the Project works by HyD. The Further Environmental Permit FEP-07/356/2009 was issued on 26 July 2013 and surrendered on 17 May 2021.

      ix.         The principle construction activities undertaken during the monitoring period included as follows:

íP     Permanent and temporary reclamation works including associated dredging works in Wan Chai Development Phase II (WDII) area (DP3)

íP     Wan Chai East Sewage Outfall (DP5)

íP     Dredging for the Cross-harbour Water Mains from Wan Chai to Tsim Sha Tsui (DP6)

       x.         Contract HY/2009/19 was responsible for marine piling works, box culvert construction and seawall reinstatement in North Point Reclamation area under EP-356/2009.

      xi.         Summaries of construction works for individual contracts undertaken during the construction period are shown as follows:

 

Contract HY/2009/11 - Wan Chai Development Phase II and Central íV Wan Chai Bypass íV North Point Reclamation

íP     Permanent reclamation works;

íP    Dredging;

íP    Seawall construction;

íP    Stormwater outfall diversion, stormwater drainage modification/improvement; and

íP   Translocation of corals at Ex-Wan Chai Public Cargoes Working Area (Ex-PCWA) Basin and North Point.

 

Contract HY/2009/19 - Central-Wanchai Bypass Tunnel (North Point Section) and Island Eastern Corridor Link

íP     Marine piling works;

íP     Box culvert construction; and

íP     Seawall reinstatement.

 

Contract HK/2009/01 - Wan Chai Development Phase II íV Central íVWanchai Bypass at Hong Kong Convention and Exhibition Centre

íP     Permanent reclamation works;

íP    Dredging; and

íP    Construction of new cross harbour water mains.

 

Contract HK/2009/02 - Wan Chai Development Phase II íV Central íV Wan Chai Bypass at WanChai East

íP     Permanent and temporary reclamation works;

íP    Dredging; and

íP     construction of a new sewage outfall

 

Contract HY/2009/15 - Central-Wanchai Bypass íV Tunnel (Causeway Bay Typhoon Shelter Section)

íP     Temporary reclamation works;

íP     Dredging;

íP     Construction of the Trunk Road; and

íP     Reinstatement of the ex-PCWA basin and the Causeway Bay Typhoon Shelter (CBTS).

 

Contract HK/2010/06 - Wan Chai Development Phase II-Central-Wan Chai Bypass over MTR Tsuen Wan Line

íP     Installation of marine bored piles; and

íP     Dredging.

 

Contract HK/2012/08 - Wan Chai Development Phase II Central-Wan Chai Bypass at Wan Chai West

íP     Permanent reclamation works;

íP     Dredging;

íP     Seawall construction;

íP     Watermains laying; and

íP     Demolition of existing Expo Drive West Bridge.

 

Contract HY/2010/08 - Central- Wanchai Bypass Tunnel íV Tunnel (Slip Road 8)

íP     Temporary reclamation works;

íP     Dredging;

íP     Construction of the Trunk Road; and

íP     Reinstatement of CBTS.

 

Environmental Monitoring and Audit Works

        i.         Summary table of the impact monitoring activities is listed below:

Air Quality Monitoring Station ID

Commencement Date

Suspension Date

CMA1b - Harbour Grand Hotel Boundary Wall

11 August 2010

23 May 2019

CMA2a - Causeway Bay Community Centre

11 August 2010

23 May 2019

CMA3a - CWB PRE Site Office

15 March 2011

22 March 2021

CMA4a - Society for the Prevention of Cruelty to Animals

29 December 2010

30 September 2019

CMA5a / CMA5b - Children Playgrounds opposite to Pedestrian Plaza / Pedestrian Plaza

01 April 2011

26 February 2019

CMA6a - WDII PRE Site Office

01 April 2011

26 February 2019

Noise Monitoring Station ID

Commencement Date

Suspension Date

M1a íV Footbridge for Ex-Harbour Road Sports Centre

06 July 2010

30 September 2019

M2b íV Noon Gun Area

10 November 2010

22 March 2021

M3a íV Tung Lo Wan Fire Station

10 November 2010

22 March 2021

M4b íV Victoria Centre

23 March 2010

01 June 2019

M5b íV City Garden

23 March 2010

01 June 2019

M6 íV HK Baptist Church Henrietta Secondary School

28 February 2012

01 June 2019

RTN1 íV FEHD Hong Kong Transport Section Whitefield Depot

05 October 2010

01 November 2012

RTN2 / RTN2a íV Oil Street Community Liaison Centre / Electric Centre

05 October 2010

01 January 2016

Water Quality Monitoring Station ID

Commencement Date

Suspension Date

WSD7 íV Kowloon South       

28 July 2010

28 April 2012

WSD9 íV Tai Wan

19 March 2010

09 September 2014

WSD10 íV Cha Kwo Ling

19 March 2010

07 February 2012

WSD15 íV Sai Wan Ho

19 March 2010

07 February 2012

WSD17 íV Quarry Bay

19 March 2010

09 September 2014

WSD19 íV Sheung Wan

28 July 2010

15 February 2019

WSD20 íV Kennedy Town

28 July 2010

28 April 2012

WSD21 íV Wan Chai

08 July 2010

10 March 2014

C1 íV HKCEC Extension

08 July 2010

27 October 2019

C2 íV Telecom House

30 July 2010

22 April 2013

C3 íV HKCEC Phase I

30 July 2010

22 April 2013

C4e íV Wan Chai Tower and Great Eagle Centre (Eastern)

30 July 2010

22 April 2013

C4w íV Wan Chai Tower and Great Eagle Centre (Western)

30 July 2010

22 April 2013

C5e íV Sun Hung Kai Centre (Eastern)

28 July 2010

26 July 2013

C5w íV Sun Hung Kai Centre (Western)

28 July 2010

26 July 2013

C6 íV Excelsior Hotel

09 November 2010

26 May 2011

C7 íV Windsor House

09 November 2010

20 April 2021

C8 íV City Garden

19 March 2010

30 March 2013

C9 íV Provident Garden

19 March 2010

30 March 2013

P1 íV HKCEC Phase I

24 April 2013

16 February 2019

P3 íV The Academy of performing Arts

24 April 2013

16 February 2019

P4 íV Shui on Centre

24 April 2013

16 February 2019

P5 íV Government Buildings (Wanchai Tower / Revenue Tower / Immigration Tower)

24 April 2013

16 February 2019

Water Quality Monitoring Station ID

Commencement Date

Suspension Date

RW21-P789 íV Great Eagle Centre/ Sun Hung Kai Centre/ WSD Wanchai salt water intake / China Resources Building

01 August 2013

27 October 2019

Ex-PCWA SE - South-eastern corners of ex-Public Cargo Works Area

13 January 2011

07 March 2017

Ex-PCWA SW - South-western corners of ex-Public Cargo Works Area

13 January 2011

07 March 2017

 

Odour Patrol

       ii.         Odour patrol was conducted according to EM&A requirement during the reporting.

      iii.         The construction phase odour patrol was commenced in 2011 and completed in 2017.

      iv.         The operation phase odour patrol was commenced in 2019 and completed in 2021.

 

Waste Management

       v.         Wastes generated from this Project include inert construction and demolition (C&D) materials and non-inert C&D materials. Details of waste management data is presented in Section 4.4.

 

Complaints, Notifications of Summons and Successful Prosecutions

      vi.         Total 51 environmental complaints were received in the reporting period. No notification of summons and successful prosecutions were received in the reporting period. The summary of complaint received shall refer to Section 6.

 

 Site Inspections and Audit

     vii.         The weekly site inspections were conducted according to EM&A manual requirement throughout the construction period. No non-compliance from the site audits was recorded throughout the reporting period.

 

 Conclusion

    viii.         The EM&A programme were found to be effective in monitoring impacts arising from the Project. The findings of the environmental monitoring program suggest that no adverse impacts on sensitive receivers at the designated monitoring locations were brought about the Project.

      ix.         In conclusion the Project was environmentally acceptable in terms of air, water quality and noise impact.

 

1      Introduction

1.1           Scope of the Report

1.1.1.      Lam Geotechnics Limited (LGL) has been appointed to work as the Environmental Team (ET) under Environmental Permit no. EP-356/2009 and Further Environmental permit nos. FEP-01/356/2009, FEP-02/356/2009, FEP-03/356/2009, FEP-04/356/2009, FEP-05/356/2009, FEP-06/356/2009, FEP-07/356/2009 and FEP-08/356/2009 to implement the Environmental Monitoring and Audit (EM&A) programme as stipulated in the EM&A Manual of the approved Environmental Impact Assessment (EIA) Report for Wan Chai Development phase II and Central-Wan Chai Bypass (Register No.: AEIAR-125/2008) and in the EM&A Manual of the approved EIA Report for Central-Wan Chai Bypass and Island Eastern Corridor Link (Register No. AEIAR-041/2001).

1.1.2.      This report presents the environmental monitoring and audit findings during the period of March 2010 to April 2022.

 

1.2           Structure of the Report

Section 1         Introduction íV details the scope and structure of the report.

Section 2         Project Background íV summarizes background and scope of the project, site description, project organization and contact details of key personnel during the reporting period.

Section 3         Monitoring Requirements íV summarizes all monitoring parameters, monitoring methodology and equipment, monitoring locations, monitoring frequency, criteria and respective event and action plan and monitoring programmes.

Section 4         Monitoring Results íV summarizes the monitoring results and exceedances recorded throughout the monitoring programme.

Section 5         Environmental Site Audit íV summarizes the findings of site inspections undertaken during the construction period, with a review of any relevant follow-up actions during the construction period.

Section 6         Complaints, Notification of summons and Prosecution íV summarizes the cumulative statistics on complaints, notification of summons and prosecution.

Section 7         Comments, Conclusions and Recommendations

 

2      Project Background

2.1           Background

2.1.1.      ížWan Chai Development phase II and Central-Wan Chai BypassíĘ and ížCentral-Wan Chai Bypass and Island Eastern Corridor LinkíĘ (hereafter called ížthe ProjectíĘ) are Designed Project (DP) under the Environmental Impact Assessment Ordinance (Cap. 499) (EIAO). The Environmental Impact Assessment (EIA) Reports for Central-Wan Chai Bypass and Island Eastern Corridor Link (Register No. AEIAR-041/2001) and Wan Chai Development phase II and Central-Wan Chai Bypass (Register No.: AEIAR-125/2008) have been approved on 31 August 2001 and 11 December 2008 respectively.

2.1.2.      The key purpose of Wan Chai Development Phase II (WDII) is to provide land at Wan Chai North and North Point for construction of the Central-Wan Chai Bypass and Island Eastern Corridor Link (CWB). Land formed under the project will be developed as a world-class waterfront promenade joining that at the new Central waterfront for public enjoyment.

2.1.3.      There is a compelling and present need for the CWB to provide relief to the very congested east-west Connaught Road Central / Harcourt Road / Gloucester Road Corridor (the Corridor) which is currently operating beyond its capacity. The CWB will provide relief to the existing congestion along the Corridor and cater for the anticipated growth of traffic on Hong Kong Island. Without the CWB and its access roads, there will not be sufficient capacity to serve the heavy traffic demands at both strategic and local levels.

2.2           Scope of the Project and Site Description

2.2.1.      The Project is located mainly in Wan Chai North, Causeway Bay and North Point, and is demarcated by Gloucester Road and Victoria Park Road to the south, Fenwick Pier Street to the west and Tong Shui Road Interchange to the east, as shown in Figure 2.1.

2.2.2.      The study area encompasses existing developments along the Wan Chai, Causeway Bay and North Point shorelines. Major land uses include the Hong Kong Convention & Exhibition Centre (HKCEC) Extension, the Wan Chai Ferry Pier, the ex-Wan Chai Public Cargo Working Area (ex-PCWA), the Royal Hong Kong Yacht Club (RHKYC), the Police OfficersíŽ Club, the Causeway Bay Typhoon Shelter (CBTS) and commercial and residential developments.

2.2.3.      The scope of the Project comprises:

íP       Land formation for key transport infrastructure and facilities, including the Trunk Road (i.e. CWB) and the associated slip roads for connection to the Trunk Road and for through traffic from Central to Wan Chai and Causeway Bay. The land formed for the above transport infrastructure will provide opportunities for the development of an attractive waterfront promenade for the enjoyment of the public

íP       Reprovisioning / protection of the existing facilities and structures affected by the land formation works mentioned above

íP       Extension, modification, reprovisioning or protection of existing storm water drainage outfalls, sewerage outfalls and watermains affected by the revised land use and land formation works mentioned above

íP       Upgrading of hinterland storm water drainage system and sewerage system, which would be rendered insufficient by the land formation works mentioned above

íP       Provision of the ground level roads, flyovers, footbridges, necessary transport facilities and the associated utility services

íP       Construction of the new waterfront promenade, landscape works and the associated utility services

íP       The Trunk Road (i.e. CWB) within the study area and the associated slip roads for connection to the Trunk Road.

2.2.4.      The project also contains various Schedule 2 DPs that, under the EIAO, require Environmental Permits (EPs) to be granted by the DEP before they may be either constructed or operated. Table 2.1 summarises the five individual DPs under this Project. Figure 2.1 shows the locations of these Schedule 2 DPs.

Table 2.1     Schedule 2 Designated Projects under this Project

Item

Designated Project

EIAO Reference

DP3

Reclamation works including associated dredging works

Schedule 2, Part I, C.1 and C.12

DP5

Wan Chai East Sewage Outfall

Schedule 2, Part I, F.5 and F.6

DP6

Dredging for the Cross-harbour Water Mains from Wan Chai to Tsim Sha Tsui

Schedule 2, Part I, C.12

 

2.3           Division of the Project Responsibility

2.3.1.      Due to the multi-contract nature of the Project, there were a number of contracts sub-dividing the whole works area into different work areas. The details of individual contracts are summarized in Table 2.2.

Table 2.2 Details of Individual Contracts under the Project

Contract No.

Contract Title

Associated DP(s)

Construction Commencement Date

HY/2009/11

Wan Chai Development Phase II and Central íV Wan Chai Bypass íV North Point Reclamation

DP3

17 March 2010

HK/2009/01

Wan Chai Development Phase II íV Central íVWanchai Bypass at Hong Kong Convention and Exhibition Centre

DP3, DP6

23 July 2010

HK/2009/02

Wan Chai Development Phase II íV Central íV Wan Chai Bypass at WanChai East

DP3, DP5

5 July 2010

HY/2009/15

Central-Wanchai Bypass íV Tunnel (Causeway Bay Typhoon Shelter Section)

DP3

10 November 2010

HK/2010/06

Wan Chai Development Phase II-Central-Wan Chai Bypass over MTR Tsuen Wan Line

DP3

22 March 2011

HY/2009/19

Central-Wanchai Bypass Tunnel (North Point Section)and Island Eastern Corridor Link

/

28 January 2012

HY/2010/08

Central- Wanchai Bypass Tunnel íV Tunnel (Slip Road 8)

DP3

21 March 2013

HK/2012/08

Wan Chai Development Phase II Central-

Wan Chai Bypass at Wan Chai West

DP3

10 March 2014

 

2.4           Major construction works undertaken during the course of the Project

íP     Permanent and temporary reclamation works including associated dredging works in Wan Chai Development Phase II area

íP     Construct a new sewage outfall and upgrade the existing Wan Chai East sewage outfall

íP     Dredging for the Cross-harbour Water Mains from Wan Chai to Tsim Sha Tsui (DP6)

 

2.5           Project Organization and Contact Personnel

2.5.1.      Civil Engineering and Development Department and Highways Department are the overall project controllers for the Wan Chai Development Phase II and Central-Wan Chai Bypass respectively. For the construction phase of the Project, Project Engineer, Contractor(s), Environmental Team and Independent Environmental Checker are appointed to manage and control environmental issues.

2.5.2.      The proposed project organization and key personnel and contact particulars are summarized in Table 2.3:

 

 

 

Table 2.3 Contact Details of Key Personnel

Party

Role

Post

Name

Contact No.

Contact Fax

AECOM

EngineeríŽs Representative for WDII

Senior Resident Engineer

Mr. S. K. Lo

3519 9033

2587 1877

EngineeríŽs Representative for CWB

Chief Resident EngineerPrinciple Resident Engineer

Ms. Lydia LeeMr. David Kwan

3762 27603912 1888

2142 55773912 3010

China Harbour- CRBC Joint Venture

Contractor under HY/2009/11

Project Director

Mr. Cho Yu Fun

3157 1086

3157 1085

Site Agent

Mr. Daniel Cheung

3157 1086

Chun Wo íV Leader Joint Venture

Contractor under HK/2009/01

Project Manager

Mr. Simon Liu

9304 8355

2587 1878

Chun Wo íV CRGL Joint Venture

Contractor under HK/2009/02

Project Manager

Mr. David Yan

9106 3890

2827 9996

China State Construction Engineering (HK) Ltd.

Contractor under HY/2009/15

Project Director

Mr. Chris Leung

3557 6393

2566 2192

 

Site Agent

Mr. Patrick Ho

3557 6405

Contractor under HY/2010/08

Project Director

Mr. Chris Leung

3467 4299

2566 8061

Site Agent

Mr. Danny Chan

9232 4754

Chun Wo - CRGL - MBEC Joint Venture

Contractor under Contract no. HY/2009/19

Project Manager

Mr. William Leung

3758 8879

3757 8901

Site Agent

Mr. William Luk

3758 6868

Gammon

-Leader JV

Contractor under HK/2010/06

Project Manager

Mr. Paul Lui

9095 7922

2529 2880

Site Agent

Mr. Eric Yip

2529 2068

China State-

Build King Joint Venture

Contractor under HK/2012/08

Project Director

Mr. C. N. Lai

9106 5806

2877 1522

Site Agent

Mr. George Cheung

9268 1918

Ramboll Hong Kong Limited

Independent Environmental Checker (IEC)

Independent Environmental Checker (IEC)

Mr. David Yeung

3465 2888

3465 2899

Lam Geotechnics Limited

Environmental Team (ET)

Environmental Team Leader (ETL)

Mr. Raymond Dai

2882 3939

2882 3331

 

3          Monitoring Requirements

3.1           Noise Monitoring

Noise Monitoring Stations

3.1.1.      The noise monitoring stations for the Project are listed in Table 3.1 and shown in Figure 3.1.                                                                                                                                                                               Appendix 3.1 shows the established Action/Limit Levels for the monitoring works.

Table 3.1 Noise Monitoring Station

Station

Description

M1a1

Footbridge for Ex-Harbour Road Sports Centre

M2b

Noon Gun Area

M3a

Tung Lo Wan Fire Station

M4b

Victoria Centre

M5b

City Garden

M64

HK Baptist Church Henrietta Secondary School

RTN12

FEHD Hong Kong Transport Section Whitefield Depot

RTN2/RTN2a3

Electric Centre

Remark 1: With respect to the demolition of Ex-Harbour Road Sports Centre, the respective noise monitoring station M1a íV Harbour Road Sports Centre were finely adjusted on 16 and 25 May 2017 and thereafter to the Footbridge for Harbour Road Sports for noise monitoring.

Remark 2: Real-time on-site monitoring systems of the noise level around the works sites at North Point and Tin Hau area were established during the construction period.

Remark 3: Real-time noise monitoring at RTN2-Oil Street Community Liaison Centre had been relocated to City Garden Electric Centre (RTN2a- Electric Centre) on 5 Oct 2012, which was a representative of noise sensitive receiver- City Garden. 

Remark 4: The major work activities under Contract no. HY/2009/11 under EP-356/2009 was substantial completed on 04 January 2012 and the construction site was handed over to Contract no. HY/2009/19 on 31 December 2011. Noise monitoring station M6 was associated with Contract no. HY/2009/19 for the marine piling works, box culvert construction and seawall reinstatement which were inside EP-356/2009 boundary.

 

Noise Monitoring Parameters, Frequency and Duration

3.1.2.      The construction noise level was measured in terms of the A-weighted equivalent continuous sound pressure level (Leq). Leq (30 minutes) was used as the monitoring parameter for the time period between 0700 and 1900 hours on normal weekdays. For all other time periods, Leq (5 minutes) was employed for comparison with the Noise Control Ordinance (NCO) criteria. Supplementary information for data auditing, statistical results such as L10 and L90 were also obtained for reference.

3.1.3.      Noise monitoring was carried out at all the designated monitoring stations. The monitoring frequency depended on the scale of the construction activities. The following is an initial guide on the regular monitoring frequency for each station on a weekly basis when noise generating activities were underway:

íP       One set of measurements between 0700 and 1900 hours on normal weekdays.

3.1.4.      If construction works were extended to include works during the hours of 1900 íV 0700 as well as public holidays and Sundays, additional weekly impact monitoring was carried out during respective restricted houríŽs periods.

 

Monitoring Equipment

3.1.5.      As referred to the Technical Memorandum ™ issued under the NCO, sound level meters in compliance with the International Electrotechnical Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications were used for carrying out the noise monitoring. Immediately prior to and following each noise measurement the accuracy of the sound level meter was checked using an acoustic calibrator generating a known sound pressure level at a known frequency. Measurements were accepted as valid only if the calibration level from before and after the noise measurement agree to within 1.0 dB.

3.1.6.      Noise measurements was not carried out in fog, rain, wind with a steady speed exceeding 5 m/s or wind with gusts exceeding 10 m/s. The wind speed was checked with a portable wind speed meter capable of measuring the wind speed in m/s.

 

3.2           Air Quality Monitoring

Air Quality Monitoring Stations

3.2.1.      The air monitoring stations for the Project are listed in Table 3.2 and shown in Figure 3.1. Appendix 3.1 shows the established Action/Limit Levels for the monitoring works.

Table 3.2 Air Monitoring Station

Station ID

Monitoring Location

Description

CMA1b1

Harbour Grand Hotel Boundary Wall

North Point

CMA2a

Causeway Bay Community Centre

Causeway Bay

CMA3a2

CWB PRE Site Office

Causeway Bay

CMA4a

Society for the Prevention of Cruelty to Animals

Wan Chai

CMA5b3

Pedestrian Plaza

Wan Chai

CMA6a

WDII PRE Site Office

Wan Chai

Remarks 1: Due to extension of site boundary by Contractor HY/2009/19, location of CMA1b at Oil Street Community Liaison Centre has been finely adjusted on 21 April 2012 and the ID was updated as Oil Street Site Office from April 2013. CMA1b was adjusted from Oil Street site office to Harbour Grand Hotel Boundary Wall on June 2017 w.r.t demolition of Oil Street Site Office.

Remarks 2: As per the ENPC meeting in March 2011, the monitoring stations CMA3a íV Future CWB site office at Wanchai Waterfront Promenade was renamed.

Remarks 3: Station CMA5a at Children Playgrounds opposite to the Pedestrian Plaza was relocated to the Pedestrian Plaza in December 2014. The station reference and location ID CMA5a was updated as CMA5b and Pedestrian Plaza respectively. The proposal for relocation was submitted to EPD by CEDD on 24 November 2014 and approved by EPD on 10 December 2014.

 

Air Monitoring Parameters, Frequency and Duration

3.2.2.      One-hour and 24-hour TSP levels were measured to indicate the impacts of construction dust on air quality. The 24-hour TSP level was measured by following the standard high volume sampling method as set out in the Title 40 of the Code of Federal Regulations, Chapter 1 (Part 50), Appendix B.

3.2.3.      All relevant data including temperature, pressure, weather conditions, elapsed-time meter reading for the start and stop of the sampler, identification and weight of the filter paper, and any other local atmospheric factors affecting or affected by site conditions, etc., were recorded down in detail.

3.2.4.      For regular impact monitoring, the sampling frequency of at least once in every six-days, was strictly observed at all the monitoring stations for 24-hour TSP monitoring. For 1-hour TSP monitoring, the sampling frequency of at least three times in every six-days was undertaken when the highest dust impact occurred.

 

Sampling Procedure and Monitoring Equipment

3.2.5.      High volume samplers (HVSs) in compliance with the following specifications were used for carrying out the 1-hour and 24-hour TSP monitoring:

íP       0.6 íV 1.7 m3 per minute adjustable flow range;

íP       equipped with a timing / control device with +/- 5 minutes accuracy for 24 hours operation;

íP       installed with elapsed-time meter with +/- 2 minutes accuracy for 24 hours operation;

íP       capable of providing a minimum exposed area of 406 cm2;

íP       flow control accuracy: +/- 2.5% deviation over 24-hour sampling period;

íP       equipped with a shelter to protect the filter and sampler;

íP       incorporated with an electronic mass flow rate controller or other equivalent devices;

íP       equipped with a flow recorder for continuous monitoring;

íP       provided with a peaked roof inlet;

íP       incorporated with a manometer;

íP       able to hold and seal the filter paper to the sampler housing at horizontal position;

íP       easily changeable filter; and

íP       capable of operating continuously for a 24-hour period.

3.2.6.      Initial calibration of dust monitoring equipment was conducted upon installation and thereafter at bi-monthly intervals. The transfer standard was traceable to the internationally recognized primary standard and be calibrated annually. The concern parties such as IEC was properly document the calibration data for future reference. All the data was converted into standard temperature and pressure condition.

 

Laboratory Measurement / Analysis

3.2.7.      A clean laboratory with constant temperature and humidity control, and equipped with necessary measuring and conditioning instruments to handle the dust samples collected, was available for sample analysis, and equipment calibration and maintenance. The laboratory was HOKLAS accredited.

3.2.8.      An alternative non-HOKLAS accredited laboratory was set-up for carrying out the laboratory analysis, the laboratory equipment was approved by the ER on 8 February 2011 and the measurement procedures were witnessed by the IEC. Any measurement performed by the laboratory was demonstrated to the satisfaction of the ER and IEC. IEC was regularly audit to the measurement performed by the laboratory to ensure the accuracy of measurement results.

3.2.9.      Filter paper of size 8íĘ x 10íĘ was labelled before sampling. It was a clean filter paper with no pinholes, and conditioned in a humidity-controlled chamber for over 24-hours and pre-weighed before used for the sampling.

3.2.10.   After sampling, the filter paper loaded with dust was kept in a clean and tightly sealed plastic bag. The filter paper was then returned to the laboratory for reconditioning in the humidity controlled chamber followed by accurate weighing by an electronic balance with readout down to 0.1 mg. The balance was regularly calibrated against a traceable standard.

3.2.11.   All the collected samples were kept in a good condition for 6 months before disposal.

 

Monitoring for Odour Patrol

3.2.12.   Odour patrols along the shorelines of Causeway Bay Typhoon Shelter and ex-Wan Chai Public Cargo Working Area when there was temporary reclamation in Causeway Bay Typhoon Shelter and in the ex-Wan Chai Public Cargo Working Area, or when there was dredging of the odorous sediment and slime at the south-western corner of the Causeway Bay Typhoon Shelter. The operational odour monitoring was carried out for 3 years period.

3.2.13.   Odour patrols were carried out at bi-weekly intervals during July, August and September by a qualified person of the ET who was:

íP       at least 16 years of age;

íP       free from any respiratory illnesses; and

íP       not allowed to smoke, eat, drink (except water) or use chewing gum or sweets 30 min before and during odour patrol.

3.2.14.   Odour patrol was conducted by independent trained personnel / competent persons patrolling and sniffing around the shore as shown in Figure 3.1 to detect any odour at the concerned hours.

3.2.15.   The qualified person used the nose (olfactory sensor) to sniff odours at different locations. The main odour emission sources and the areas to be affected by the odour nuisance was identified.

3.2.16.   The perceived odour intensity was divided into 5 levels which ranked in the descending order as follows:

íP       0 íV Not detected. No odour perceived or an odour so weak that it cannot be easily characterized or described;

íP       1 íV Slight Identifiable odour, and slight chance to have odour nuisance;

íP       2 íV Moderate Identifiable odour, and moderate chance to have odour nuisance;

íP       3 íV Strong Identifiable, likely to have odour nuisance;

íP       4 íV Extreme Severe odour, and unacceptable odour level.

3.2.17.   The findings including odour intensity, odour nature and possible odour sources, and also the local wind speed and direction at each location were recorded. In addition, some relevant meteorological and tidal data such as daily average temperature, and daily average humidity, on that surveyed day were obtained from the Hong Kong Observatory Station for reference. The Action and Limit levels for odour patrol are shown in Appendix 3.1.

3.2.18.   The qualified odour patrol member had individual n-butanol thresholds complied with the requirement of European Standard Method of Air Quality íV Determination of Odour Concentration by Dynamic Olfactometry (EN13725) in the range of 20 to 80 ppb.

 

3.3           Water Quality Monitoring

Water Quality Monitoring Stations

3.3.1.      The water quality monitoring stations of the Project are listed in Table 3.3 and shown in Figure 3.1. Appendix 3.1 shows the established Action/Limit Levels for the monitoring works.

Table 3.3 Marine Water Quality Stations for Water Quality Monitoring

Station Ref.

Location

Easting

Northing

WSD Salt Water Intake

WSD7

Kowloon South

834150.0

818300.3

WSD9

Tai Wan

837921.0

818330.0

WSD10

Cha Kwo Ling

841900.9

817700.1

WSD15

Sai Wan Ho

841110.4

816450.1

WSD17

Quarry Bay

839790.3

817032.2

WSD19

Sheung Wan

833415.0

816771.0

WSD20

Kennedy Town

830750.6

816030.3

WSD21

Wan Chai

836220.8

815940.1

Cooling Water Intake

C1

HKCEC Extension

835885.6

816223.0

C2

Telecom House / APA / SOC

835647.9

815864.4

C3

HKCEC Phase I

835836.2

815910.0

C4e

Great Eagle Centre

835932.8

815888.2

C4w

Wan Chai Tower

835629.8

815889.2

C5e

Sun Hung Kai Centre (Eastern)

836250.1

815932.2

C5w

Sun Hung Kai Centre (Western)

836248.1

815933.2

C6

Excelsior Hotel

837009.6

815999.3

C7

Windsor House

837193.7

816150.0

C8

City Garden

837970.6

816957.3

C9

Provident Garden

838355.0

817116.6

P1

HKCEC Phase I

835774.7

816179.4

P3

The Academy of performing Arts

835824.6

816212.0

P4

Shui on Centre

835865.6

816220.0

P5

Government Buildings

(Wanchai Tower / Revenue Tower / Immigration Tower)

835895.2

816215.2

Cooling Water Intake / WSD Salt Water Intake

RW21-P789

Great Eagle Centre/ Sun Hung Kai Centre/ WSD Wanchai salt water intake / China Resources Building

836268.0

816020.0

Remark 1: As per the meeting with the representative of Excelsior Hotel and World Trade Centre on 17 May 2011, they confirmed that the seawater intake for The Excelsior was no longer in use and replaced by the connected permanent water supply from WSD pipelines since 11 January 2011. Thus, the impact water quality monitoring for the cooling intake - C6 was terminated effective from 26 May 2011.              

Remark 2: Due to the significant location difference, the previous water quality monitoring stations were considered to be invalid to represent the water quality at relocated cooling water intake. In addition, the site areas at the previous water quality monitoring stations were changed and affected by construction activities and no longer available for water quality monitoring. Under such circumstances, the water quality monitoring stations shall be relocated to the respective relocated intake locations. The summary of relocation of water quality monitoring stations are shown in below table 3.4.

Table 3.4. Summary of relocation of water quality monitoring stations

Previous Water Quality Monitoring stations

Respective relocated water quality monitoring stations

Remarks

C2

P3, P4

After reviewing the cooling intake pump station status with WDII RSS and IEC, the water quality monitoring at related water quality monitoring stations P1, P3, P4 and P5 was commenced from 24 April 2013

C3

P1

C4w

P5

C4e

RW21-P789

With respect to the switching over of the cooling water intake to re-provisioned cooling water intake, the water quality monitoring at relocated water quality monitoring station RW21-P789 was commenced from 29 July 2013.

C5e

C5w

WSD21

                                                                          

Water Quality Parameters

3.3.2.      Monitoring of dissolved oxygen (DO), turbidity and suspended solids (SS) were carried out at WSD flushing water intakes and cooling water intakes. DO and Turbidity were measured in-situ while SS was determined in laboratory.

3.3.3.      In association with the water quality parameters, other relevant data were also measured, such as monitoring location/position, time, sampling depth, water temperature, pH, salinity, dissolved oxygen (DO) saturation, weather conditions, sea conditions, tidal stage, and any special phenomena and work underway at the construction site etc.

 

Sampling Procedures and Monitoring Equipment

3.3.4.      The interval between two sets of monitoring were less than 36 hours except where there were exceedances of Action and/or Limit Levels, in which case the monitoring frequency would be increased. Table 3.5 shows the proposed monitoring frequency and water quality parameters. Duplicate in-situ measurements and water sampling should be carried out in each sampling event. For selection of tides for in-situ measurement and water sampling, tidal range of individual flood and ebb tides was not less than 0.5 m.

Table 3.5 Marine Water Quality Monitoring Frequency and Parameters

Activities

Monitoring Frequency1

Parameters2

During the 4-week baseline monitoring period

Three days per week, at mid-flood and mid-ebb tides

Turbidity, Suspended Solids (SS), Dissolved Oxygen (DO), pH, Temperature, Salinity

During marine construction works

Three days per week, at mid-flood and mid-ebb tides

Turbidity, Suspended Solids (SS), Dissolved Oxygen (DO), pH, Temperature, Salinity

After completion of marine construction works

Three days per week, at mid-flood and mid-ebb tides

Turbidity, Suspended Solids (SS), Dissolved Oxygen (DO), pH, Temperature, Salinity

Notes:

1.      For selection of tides for in-situ measurement and water sampling, tidal range of individual flood and ebb tides was not less than 0.5m.

2.      Turbidity was measured in situ whereas SS was determined by laboratory.

 

Enhanced Water Quality Monitoring in the ex-Wan Chai Public Cargo Working Area and the Causeway Bay Typhoon Shelter

3.3.5.      The enhanced water quality monitoring and audit programme was to avoid aggravation of odour nuisance from seawater arising from temporary reclamation in the ex-Wan Chai Public Cargo Working Area and the Causeway Bay Typhoon Shelter.

3.3.6.      Dissolved oxygen monitoring at the intakes C6 and C7 in Causeway Bay Typhoon Shelter when there was temporary reclamation in Causeway Bay Typhoon Shelter and at the south-western and south-eastern corners of the ex-Wan Chai Public Cargo Working Area. The proposed water quality monitoring stations of the Project are listed in Table 3.6 and shown in Figure 3.1.

 

 

 

Table 3.6 Marine Water Quality Stations for Enhanced Water Quality Monitoring

Station

Location

C6

Proposed Exhibition Station / World Trade Centre

C7

Windsor House

Ex-WPCWA-SW

South-western of the ex-Wan Chai Public Cargo Working Area

Ex-WPCWA-SE

South-eastern of the ex-Wan Chai Public Cargo Working Area

Remarks:

1.    Enhanced DO monitoring at Windsor House Cooling (Station Ref: C7) was temporarily suspended since 22 October 2014 with respect to the formation of temporary reclamation zone TS3 and was resumed from 1 February 2018 onwards with respect to the completion of removal of temporary reclamation zone.

2.    Enhanced DO monitoring at Monitoring station Ex-WPCWA SE was temporarily suspended from 31 August 2015 with respect to seawall reinstatement works and formation of active works area. The Enhance DO monitoring at Ex-WPCWA SE was resumed on 11 May 2016 due to completed section of seawall reinstatement works at Ex-PCWA.

3.3.7.      The monitoring of dissolved oxygen were carried out 3 days per week, at mid-flood and mid-ebb tides for 3 water depths (1m below water surface, mid-depth and 1m above sea bed, except where the water depth less than 6m, the mid-depth may be omitted. If the water depth be equal to or less than 3m, only the mid-depth will be monitored).

4.          Monitoring Results

4.0.1.      The Event Action Plan for construction noise, air quality and water quality are presented in Appendix 4.1.

 

4.1       Noise Monitoring Results

4.1.1.      The noise monitoring limit level exceedances in reporting period is summarized in Table 4.1 below.

Table 4.1 Summary of noise limit level exceedances

Year

Limit level

M1a

M2b

M3a

M4b

M5b

M6

Total

2010

Non-Project related

0

0

0

2

2

0

4

Project related

0

0

0

0

0

0

2011

Non-Project related

0

0

0

0

0

0

0

Project related

0

0

0

0

0

0

2012

Non-Project related

0

0

0

0

0

19

19

Project related

0

0

0

0

0

0

2013

Non-Project related

2

0

0

0

0

35

39

Project related

0

0

0

0

0

2

2014

Non-Project related

0

0

0

0

0

19

22

Project related

0

2

0

0

0

1

2015

Non-Project related

5

0

0

0

0

6

13

Project related

0

0

0

0

0

2

2016

Non-Project related

17

0

0

0

0

8

25

Project related

0

0

0

0

0

0

2017

Non-Project related

14

0

0

0

0

12

31

Project related

3

0

0

0

1

1

2018

Non-Project related

4

0

0

0

0

3

9

Project related

1

0

0

0

0

1

2019

Non-Project related

0

0

0

2

0

6

8

Project related

0

0

0

0

0

0

2020

Non-Project related

-

0