TABLE OF CONTENTS

 

EXECUTIVE SUMMARY.. 1

Introduction. 1

Environmental Monitoring Works. 1

Key Information in the Reporting Month. 4

Key Construction Work in the reporting month & the next reporting month. 4

Future Key Issues. 7

1.       introduction.. 9

Purpose of the Report 9

Structure of the Report 9

2.       PROJECT INFORMATION.. 11

Background. 11

Project Organizations. 11

Construction Activities undertaken during the Reporting Month. 12

Status of Environmental Licences, Notification and Permits. 14

Summary of EM&A Requirements. 14

3.       AIR QUALITY.. 17

Monitoring Requirements. 17

Monitoring Locations. 17

Monitoring Equipment 17

Monitoring Parameters and Frequency. 18

Monitoring Methodology. 18

Results and Observations. 21

4.       NOISE.. 22

Monitoring Requirements. 22

Monitoring Locations. 22

Monitoring Equipment 22

Monitoring Methodology and QA/QC Procedure. 23

Results and Observations. 24

5.       WATER QUALITY.. 27

Monitoring Requirements. 27

Monitoring Locations. 28

Monitoring Equipment 28

Monitoring Parameters and Frequency. 30

Monitoring Methodology. 30

Laboratory Analytical Methods. 31

QA/QC Requirements. 31

Decontamination Procedures. 31

Sampling Management and Supervision. 31

Results and Observations. 32

6.       ECOLOGY.. 35

Post-Translocation Coral Monitoring. 35


 

7.       cultural heritage.. 36

Monitoring Requirement 36

Monitoring Locations. 36

Monitoring Equipment 36

Monitoring Methodology. 37

Alert, Alarm and Action Levels. 37

Results. 37

Mitigation Measures for Cultural Heritage. 37

8.       LANDSCAPE AND VISUAL IMPACT REQUIREMENTS. 38

9.       LANDFILL GAS MONITORING.. 39

Monitoring Requirement 39

Monitoring Parameters and Frequency. 39

Monitoring Locations. 39

Monitoring Equipment 39

Results and Observations. 40

10.    ENVIRONMENTAL AUDIT.. 41

Site Audits. 41

Implementation Status of Environmental Mitigation Measures. 41

11.    WASTE MANAGEMENT.. 42

12.    ENVIRONMENTAL NON-CONFORMANCE.. 43

Summary of Exceedances. 43

Summary of Environmental Non-Compliance. 43

Summary of Environmental Complaint 43

Summary of Environmental Summon and Successful Prosecution. 43

13.    FUTURE KEY ISSUES. 44

Key Issues for the Coming Month. 45

14.    CONCLUSIONS AND RECOMMENDATIONS. 47

Conclusions. 47

Recommendations. 48

 


lIST OF TABLES

 

Table I             Non-compliance (exceedance) Recorded for the Project in the Reporting Month

Table II           Key Information in the Reporting Month

Table III          Summary Table for Complaint Details in the Reporting Month

Table IV          Summary Table for Key Construction Work in the Reporting Month

Table V           Summary Table for Site Activities in the next Reporting Period

Table 2.1         Key Project Contacts

Table 2.2         Summary Table for Major Site Activities in the Reporting Month

Table 2.3         Construction Programme Showing the Inter-Relationship with Environmental Protection/Mitigation Measures

Table 2.4         Summary of the Status of Environmental Licences, Notification and Permits

Table 3.1         Locations for Air Quality Monitoring

Table 3.2         Air Quality Monitoring Equipment

Table 3.3         Impact Dust Monitoring Parameters, Frequency and Duration

Table 3.4         Major Dust Source during Air Quality Monitoring

Table 4.1         Noise Monitoring Stations

Table 4.2         Noise Monitoring Equipment

Table 4.3         Noise Monitoring Parameters, Frequency and Duration

Table 4.4         Major Noise Source during Noise Monitoring

Table 4.5         Baseline Noise Level and Noise Limit Level for Monitoring Stations

Table 4.6         Baseline Noise Level and Noise Limit Level for Monitoring Stations (Evening-time & Daytime (Holiday))

Table 4.7         Baseline Noise Level and Noise Limit Level for Monitoring Stations (Night-time)

Table 5.1         Not Used

Table 5.2         Marine Water Quality Monitoring Stations

Table 5.3         Water Quality Monitoring Equipment

Table 5.4         Water Quality Monitoring Parameters and Frequency

Table 5.5         Methods for Laboratory Analysis for Water Samples

Table 5.6         Summary of Groundwater Quality Monitoring Results

Table 7.1         Cultural Heritage Monitoring Equipment

Table 7.2         AAA Levels for Monitoring for Cultural Heritage

Table 9.1         Landfill Gas Monitoring Equipment

Table 13.1       Summary Table for Site Activities in the next Reporting Period

 


lIST OF FIGUREs

 

Figure 1           Site Layout Plan

Figure 1a         Site Portions under Works Contract No. NE/2015/01 (Lam Tin Side)

Figure 1b         Site Portions under Works Contract No. NE/2015/01 (Tseung Kwan O Side)

Figure 1c         Site Portions under Works Contract No. NE/2015/02

Figure 1d         Site Portions under Works Contract No. NE/2015/03

Figure 1e         Site Portions under Works Contract No. NE/2017/01

Figure 1f         Site Portions under Works Contract No. NE/2017/01

Figure 1g         Site Portions under Works Contract No. NE/2017/02

Figure 1h         Site Portions under Works Contract No. NE/2017/02

Figure 2           Locations of Air Quality Monitoring Stations

Figure 3           Locations of Construction Noise Monitoring Stations

Figure 4           Not Used

Figure 5           Locations of Marine Water Quality Monitoring Stations

Figure 6           Locations of Landfill Gas Monitoring

Figure 7           Location of Post-translocation Coral Monitoring

Figure 8           Location of Monitoring for Cultural Heritage

Figure 9           Not Used

 

 

 

lIST OF APPENDIces

 

Appendix A        Action and Limit Levels

Appendix B        Copies of Calibration Certificates

Appendix C        Weather Information

Appendix D        Environmental Monitoring Schedules

Appendix E         1-hour TSP Monitoring Results and Graphical Presentations

Appendix F         24-hour TSP Monitoring Results and Graphical Presentations

Appendix G        Noise Monitoring Results and Graphical Presentations

Appendix H       Not Used

Appendix I          Marine Water Quality Monitoring Results and Graphical Presentations

Appendix J           Not Used

Appendix K        Summary of Exceedance

Appendix L         Site Audit Summary

Appendix M       Event and Action Plans

Appendix N       Implementation Schedule And Recommended Mitigation Measures

Appendix O       Summaries of Environmental Complaint, Warning, Summon and Notification of Successful Prosecution

Appendix P         Waste Generation in the Reporting Month

Appendix Q       Tentative Construction Programme

Appendix R        Record of Landfill Gas Monitoring by Contractor

Appendix S         Not Used

Appendix T         Cultural Heritage Monitoring Results

Appendix U       Piezometer Monitoring Results

Appendix V       Updated Surface Runoff Management Plan

 

 


EXECUTIVE SUMMARY

Introduction

1.      This is the 44th Environmental Monitoring and Audit (EM&A) Report prepared by Cinotech Consultants Limited for the Agreement No. CE 59/2015 (EP) Environmental Team for Tseung Kwan O Lam Tin Tunnel Design and Construction (hereinafter called the Project). This report documents the findings of EM&A Works conducted in June 2020.

 

2.      During the reporting month, the following works contracts were undertaken:

  Contract No. NE/2015/01 Tseung Kwan O Lam Tin Tunnel Main Tunnel and Associated Works;

  Contract No. NE/2015/02 Tseung Kwan O Lam Tin Tunnel Road P2 and Associated Works;

  Contract No. NE/2015/03 Tseung Kwan O Lam Tin Tunnel Northern Footbridge;

  Contract No. NE/2017/01 Tseung Kwan O Lam Tin Tunnel Tseung Kwan O Interchange and Associated Works

  Contract No. NE/2017/02 Tseung Kwan O Lam Tin Tunnel Road P2/D4 and Associated Works.

  Contract No. NE/2017/06 Tseung Kwan O Lam Tin Tunnel Traffic Control and Surveillance System(TCSS) and Associated Works

  Contract No. NE/2017/07 Cross Bay Link, Tseung Kwan O Main Bridge and Associated Works.

Environmental Monitoring Works

3.      Environmental monitoring for the Project was performed in accordance with the EM&A Manual and the monitoring results were checked and reviewed. Site Inspections/Audits were conducted once per week. The implementation of the environmental mitigation measures, Event Action Plans and environmental complaint handling procedures were also checked.

 

4.      Summary of the non-compliance (exceedance) in the reporting month for the Project is tabulated in Table I.

 


 

Table I Non-compliance (exceedance) Record for the Project in the Reporting Month

Environmental Monitoring

No. of Non-compliance (Exceedance)

No. of Non-compliance (Exceedance)

due to Construction Activities of this Project

Action Taken

Action Level

Limit Level

Action Level

Limit Level

Air Quality

0

0

0

0

N/A

Noise

3

0

3

0

Refer to Appendix K & O

Marine Water Quality

50

142

0

0

Refer to Appendix K

Groundwater Level Monitoring (Piezometer Monitoring)

0

N/A1

0

N/A1

N/A

Ecological

N/A

N/A

N/A

N/A

N/A

Cultural Heritage

0

0

0

0

N/A

Landfill Gas

0

0

0

0

N/A

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note:(1) No Limit Level for Groundwater Level Monitoring (Piezometer Monitoring).

 

Air Quality Monitoring

 

5.      No Action/Limit Level exceedance for 1-hour TSP monitoring was recorded.

 

6.      No Action/Limit Level exceedance for 24-hour TSP monitoring was recorded.

 

Construction Noise Monitoring

 

7.      Three (3) Action Level exceedances were recorded due to the documented complaints received in this reporting month. The Summary of Documented Complaints in Reporting Month is tabulated in Table III.

 

8.      No Limit Level exceedance for day time and no limit level exceedance for night time construction noise monitoring were recorded in the reporting month.

 

Water Quality Monitoring

 

9.      Groundwater quality monitoring had been suspended since October 2019 upon the agreement by EPD. Further details should be founded at Section 5.1.

 

10.  All marine water quality monitoring was conducted as scheduled in the reporting month. There were fifty (50) Action Level and one hundred and forty-two (142) Limit Level exceedances in Monitoring Stations (M) during marine water quality monitoring. During this reporting month, no sand plume was observed during the water quality monitoring and site audits, therefore there is no direct evidence that the recent exceedances were due to the construction works of the Project. Details of this investigation are presented in Section 5. Daily silt curtain inspection and weekly diving inspection have been carried out by contractor, the record, as reviewed by the site auditors, indicated that silt curtains were found in good conditions.

 

11.  Construction phase daily piezometer monitoring by the Contractor commenced in June 2018. It has switched to monthly basis since 3 October 2018 as the construction activity was 120m away from the piezometer gate. The daily piezometer monitoring has resumed on 19 November 2018, as the construction activity was within 50m. No Action Level exceedance was recorded in the reporting month.

 

Ecological Monitoring

 

12.  Post-translation coral monitoring survey shall be conducted once every 3 months for a period of 12 months after completion of coral translocation. The post-translocation coral monitoring surveys were completed in November 2017.

 

Monitoring on Cultural Heritage

 

13.  Monitoring of impacts on Cultural Heritage at Cha Kwo Ling Tin Hau Temple commenced in May 2017. No Alert, Alarm and Action (AAA) Level exceedance was recorded in the reporting month.

 

Landscape and Visual Monitoring and Audit

 

14.  The implementation of landscape and visual mitigation measures was checked during the environmental site inspections. Recommended follow-up actions have been discharged by the Contractor. Details of the audit findings and implementation status are presented in Section 10.

 

Landfill Gas Monitoring

 

15.  Monitoring of landfill gases commenced in December 2016 and were carried out by the Contractor at excavation location, Portion III. No Limit Level exceedance was recorded.

 

Environmental Site Inspection

 

16.  Joint weekly site inspections were conducted by representatives of the Contractor, Engineer and Environmental Team. The representative of the IEC joined the site inspection for NE/2015/01, NE/2015/02, NE/2017/01 and NE/2017/02 on 24, 18, 18 and 18 June 2020 respectively. Details of the audit findings and implementation status are presented in Section 10.

 

Waste Management

 

17.  Wastes generated from this Project include inert construction and demolition (C&D) materials, non-inert C&D materials and marine sediment. Details of waste management data is presented in Section 11 and Appendix P.


 

Key Information in the Reporting Month

 

18.  Summary of key information in the reporting month is tabulated in Table II

Table II Key Information in the Reporting Month

Monthly Complaints

Event Details

Action Taken

Status

Number

Nature

June 2020

6

Air / Noise / Water/ Odour

Details refer to App O

Draft CIRs submitted/ On-going

May 2020

4

Air / Noise

Details refer to App O

Draft CIRs submitted/ On-going

April 2020

42

Air / Noise / Light / Odour

Details refer to App O

Draft CIRs submitted/ Closed

March 2020

11

Noise / Odour / Water

Details refer to App O

Draft CIRs submitted/

Closed

February 2020

4

Noise

Details refer to App O

Closed

January 2020

61

Noise

Details refer to App O

Closed

December 2019

5

Noise

Details refer to App O

Closed

Notifications of any summons & prosecutions received

0

---

N/A

N/A

1. One new complaint was received after the submission of the EMA Report (Jan 2020)

2. One of the complaint in April 2020 was missed out and discovered at mid-May 2020.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

19.  Summary of complaints received in the reporting month is tabulated in Table III.

 

Table III Summary of Complaints Details in Reporting Month

Complaint

Investigation Findings

Follow-up Action / Mitigation Measure

Tseung Kwan O Side

Suspected oil leakage at TKO south Open Sea

Investigation undergoing

Suspected muddy water and noise nuisance due to speeding

Long-term noise nuisance and insufficient noise mitigation measures

Pungent smell suspected coming from the work sites

The preliminary result showed no direct relationship between the nuisance and the construction works. The details shall be referred to PCIR-A17.

NIL

Flooding within work site & suspected muddy water spillage

The flooding is a normal phenonmenon as the site boundary have been embarked. The suspected muddy water is wide-spread among the open sea at TKO south and no exceedance of SS were recordede after the incident. The complaint is considered non-project-related and details shall be referred to CIR-W14.

The Contractor had checked the condition of the drainage and remove the sediment that may affect the performance of the drainage.

Lam Tin Side

Noise nuisance at Morning nearby East Habour Crossing

Investigation undergoing

Key Construction Work in the reporting month & the next reporting month

20.  Summary of key construction work in the reporting month is tabulated in Table IV.

 

Table IV Summary Table for Key Construction Work in the Reporting Month

Contract No.

Project Title

Site Activities (June 2020)

NE/2015/01

Tseung Kwan O Lam Tin Tunnel Main Tunnel and Associated Works

Lam Tin Interchange

1)    EHC2 U-Trough

2)    Site Formation Area 1G1, Area 1G2, Area 2, Area 3, Area 4 & Area 5

3)    Administration Building

Main Tunnel

4)    Main Tunnel Excavation

5)    Main Tunnel Lining Works

TKO Interchange

6)    Haul Road Construction and Site Formation & Slope Works

7)    Bridge Construction

8)      East Ventilation Building

NE/2015/02

Tseung Kwan O Lam Tin Tunnel Road P2 and Associated Works

1)          Site formation works, road and drainage for Road P2 CH500-CH650 and SR1

2)          R.C. Structure works for U-trough CH318 CH363.50

3)          Construction of utility trough and pre-cast concrete barrier at P2 U-trough CH411 CH500 and SR2 CH170 CH250

4)          Installation of socketed H-pile at S200 CH821 P2 CH105

5)          Pre-boring for sheetpile at S200 CH821 P2 CH105

6)          Pre-boring for sheetpile at storm water manhole 9101 9103

7)          Sloping seawall construction

8)          Removal of temporary cofferdam

9)          Backfilling the directional sign footing DS25, ADS22

10)      Sheetpile installation at S200 CH821-P2 CH105

11)      Installation of socketed H-pile at CT01 CH117 CH336

12)      TAM grouting works at CH105-CH318 cofferdam

13)      Excavation for abutment

14)      Construction of abutment

15)      Construction of barrier at CH500 CH650

16)      Drainage works at SR1 footpath / cycle truck

17)      Installation of ELS at cofferdam CH105 CH318

18)      Excavation of 3rd layer of ELS at CH105 CH318 cofferdam

19)      Backfilling works for reinstatement of Tong Yin Street

20)      Construction of storm water drain system for SHH 9101 9103

 

NE/2015/03

Tseung Kwan O Lam Tin Tunnel Northern Footbridge

The construction works under the contract had been completed in December 2019. The EM&A works were terminated in late April 2020.

NE/2017/01

Tseung Kwan O Lam Tin Tunnel Tseung Kwan O Interchange and Associated Works

1)      Construction of Pier

2)      Construction of Pier Head Works

3)      Bored Piling Works

4)      Segment Erection Works

5)      Dismantling of Temporary Working Platforms

NE/2017/02

Tseung Kwan O Lam Tin Tunnel Road P2/D4 and Associated Works

1)      Inspection pit excavation and utility diversion works

2)      Construction of drainage and watermain

3)      Pile cap

4)      Asphalt Paving

5)      Pier, Staircase and Lift Shalt Construction

6)      Road Works

7)      Pre-bored Socket-H Pile

NE/2017/06

Tseung Kwan O Lam Tin Tunnel Traffic Control and Surveillance System(TCSS) and Associated Works

Nil


 

Future Key Issues

21.  The future key environmental issues in the coming month include:

 

Table V Summary Table for Site Activities in the next Reporting Period

Contract No. and Project Title

Site Activities (July 2020)

Key Environmental Issues *

NE/2015/01 - Tseung Kwan O Lam Tin Tunnel Main Tunnel and Associated Works

Lam Tin Interchange

1)    EHC2 U-Trough

2)    Site Formation Area 1G1, Area 1G2, Area 2, Area 3, Area 4 & Area 5

3)    Administration Building

(A) / (B) / (C) / (D) / (E) / (G)

Main Tunnel

4)    Main Tunnel Excavation

5)    Main Tunnel Lining Works

(B)

TKO Interchange

6)    Haul Road Construction and Site Formation & Slope Works

7)    Bridge Construction

8)    East Ventilation Building

(A) / (C) / (D) / (E) / (F) / (I)

NE/2015/02 - Tseung Kwan O Lam Tin Tunnel Road P2 and Associated Works

1)      Construction of pillar box and ducting system at Portion IV adjacent to Ocean Shores EVA

2)      Construction of utility trough and road barriers at road P2 CH411 500 and SR2 CH110 CH170 (land section)

3)      Site formation at Road P2 CH500-CH650 and SR1

4)      Road and drainage works at Road P2 CH500 650, slip road SR1 footpath and cycle track, slip road SR2 CH250 CH350

5)      R.C. structure works for U-trough CH318-CH363

6)      ELS at underpass P2 CH105 CH318

7)      Modification of dewatering system (P2 CH105 CH318)

8)      3rd of excavation at CH105 CH318 cofferdam

9)      Sheetpile installation at S200 CH821 P2 CH105

10)  Installation of de-watering system at S200 CH821 CH105

11)  Installation of socketed H-pile at CT01 CH117 CH336

12)  Construction of abutment

13)  Reposition of Tong Yin Street

14)  Drainage works from SMH9101 SMH9103

15)  Installation of de-watering system at CH821 CH105

16)  Excavation & ELS installation works at CH821 CH105

17)  Construction of sloping seawall

18)  Removal of temporary cofferdam

19)  Construction of seawall coping

20)  Installation of profile barrier at P2 CH500-CH650

21)  Construction of barrier at CH500 CH650

22)  Drainage works at SR1 footpath / cycle truck

23)  Installation of ELS at cofferdam CH105 CH318

24)  Excavation of 3rd layer of ELS at CH105 CH318 cofferdam

25)  Backfilling works for reinstatement of Tong Yin Street

26)  Construction of storm water drain system for SHH 9101 9103

 

(A) / (B) / (C) / (D) / (E) / (G) / (I)

NE/2015/03 - Tseung Kwan O Lam Tin Tunnel Northern Footbridge

 

The construction works under the contract had been completed in December 2019. Materials are being removed from works area.

N/A

NE/2017/01 Tseung Kwan O Interchange and Associated Works

1)      Dismantling of Temporary Working Platforms

2)      Bored Piling Works

3)      Installation of Precast Pile Cap Shell

4)      Construction of Pile Cap

5)      Construction of Pier

6)      Construction of Pier Head works

7)      Segment erection works

8)      Construction of Bridge Decks

(A) / (B) / (E) / (F) / (G)

NE/2017/02 Tseung Kwan O - Lam Tin Tunnel - Road P2/D4 and Associated Works

1)      Inspection pit excavation and utility diversion works

2)      Construction of drainage and watermain

3)      Pile cap

4)      Pre-bored Socket-H Pile

5)      Asphalt Paving

6)      Pier, Staircase and Lift Shalt Construction

7)      Road Works

(A) / (B) / (E) / (F) / (G)

NE/2017/06 Tseung Kwan O Lam Tin Tunnel Traffic Control and Surveillance System(TCSS) and Associated Works

Nil

N/A

Note:

(A)     Watering for dust generation from haul road, stockpiles of dusty materials, exposed site area, excavation works and rock breaking activities;

(B)      Noisy construction activity such as rock-breaking activities and piling works;

(C)      Runoff from exposed slope or site area;

(D)     Wastewater and runoff discharge from site;

(E)      Accumulation of silt, mud and sand along U-channels and sedimentation tanks;

(F)       Set up and implementation of temporary drainage system for the surface runoff;

(G)     Storage of chemicals/fuel and chemical waste/waste oil on site;

(H)     Accumulation and storage of general and construction waste on site; and

(I)        Marine water quality impact and indirect impact to coral communities due to marine construction for TKO-LTT reclamation

 


 


 

1.              introduction

 

1.1              Cinotech Consultants Limited (Cinotech) was commissioned by Civil Engineering and Development Department (CEDD) as the Environmental Team (ET) to undertake environmental monitoring and auditing services for the Works Contracts involved in the implementation of Tseung Kwan O Lam Tin Tunnel (TKO-LTT) project to ensure that the environmental performance of the Works Contracts comply with the requirements specified in the Environmental Permit (EP), Environmental Monitoring & Audit (EM&A) Manual, Environmental Impact Assessment (EIA) Report of the TKO-LTT project and other relevant statutory requirements. This is the 44th Monthly EM&A report summarizing the EM&A works for the Project in June 2020.

Purpose of the Report

1.2              This is the 44th Monthly EM&A Report which summarises the impact monitoring results and audit findings for the EM&A programme during the reporting period in June 2020.

Structure of the Report

1.3              The structure of the report is as follows:

 

Section 1: Introduction purpose and structure of the report.

Section 2: Contract Information summarises background and scope of the Contract, site description, project organization and contact details, construction programme, the construction works undertaken and the status of Environmental Permits/Licenses during the reporting month.

Section 3: Air Quality Monitoring summarises the monitoring parameters, monitoring programmes, monitoring methodologies, monitoring frequency, monitoring locations, Action and Limit Levels, monitoring results and Event / Action Plans.

 

Section 4: Noise Monitoring summarises the monitoring parameters, monitoring programmes, monitoring methodologies, monitoring frequency, monitoring locations, Action and Limit Levels, monitoring results and Event / Action Plans.

 

Section 5: Water Quality Monitoring summarises the monitoring parameters, monitoring programmes, monitoring methodologies, monitoring frequency, monitoring locations, Action and Limit Levels, monitoring results and Event / Action Plans.

 

Section 6: Ecological Monitoring summarises the monitoring parameters, monitoring programmes, monitoring methodologies, monitoring frequency, monitoring locations and Action and Limit Levels, monitoring results and Event / Action Plans.

 

Section 7: Cultural Heritage summarises the monitoring parameters, monitoring programmes, monitoring methodologies, monitoring frequency, monitoring locations and monitoring results.

 

Section 8: Landscape and Visual Monitoring Requirements summarises the requirements of landscape and visual monitoring

 

Section 9: Landfill Gas Monitoring summarises the monitoring parameters, monitoring programmes, monitoring methodologies, monitoring frequency, monitoring locations, monitoring results and Limit Levels and Action Plan

 

Section 10: Environmental Site Inspection summarises the audit findings of the weekly site inspections undertaken within the reporting month.

 

Section 11: Waste Management summarises the waste management data in the reporting month.

 

Section 12: Environmental Non-conformance summarises any monitoring exceedance, environmental complaints, environmental summons and successful prosecutions within the reporting month.

Section 13: Future Key Issues summarises the impact forecast and monitoring schedule for the next three months.

 

Section 14: Conclusions and Recommendation



 

2.              PROJECT INFORMATION

Background

 

2.1              Background

 

2.1              In 2002, Civil Engineering and Development Department (CEDD) commissioned an integrated planning and engineering study under Agreement No. CE 87/2001 (CE) Further Development of Tseung Kwan O Feasibility Study (the TKO Study) to formulate a comprehensive plan for further development of TKO New Town. It recommended to further develop TKO to house a total population of 450,000 besides the districts continuous commercial and industrial developments.

 

2.2              At present, the Tseung Kwan O Tunnel is the main connection between Tseung Kwan O (TKO) and other areas in the territory. To cope with the anticipated transport need, the TKO Study recommended the provision of Tseung Kwan O Lam Tin Tunnel (TKO-LTT) (hereinafter referred to as the Project) and Cross Bay Link (CBL) to meet the long-term traffic demand between TKO and the external areas. The site layout plan for the Project is shown in Figure 1. CBL was also entrusted with part of the marine viaducts near Tseung Kwan O Interchange since the commencement of the CBL project the December 2018.

 

2.3              The Environmental Impact Assessment (EIA) Report for the TKO-LTT project was approved under the Environmental Impact Assessment Ordinance (EIAO) in July 2013. The corresponding Environmental Permit (EP) was issued in August 2013 (EP no.: EP-458/2013). Variations to the EP was applied and the latest EP (EP no.: EP-458/2013/C) was issued by the Director of Environmental Protection (DEP) in January 2017.

 

2.4              The commencement dates of construction of this Project are:

Ÿ   Contract No. NE/2015/01 and Contract No. NE/2015/02: 7 November 2016.

Ÿ   Contract No. NE/2015/03: 29 May 2017.

Ÿ   Contract No. NE/2017/02: 15 March 2018.

Ÿ   Contract No. NE/2017/01: 23 May 2018.

Ÿ   Contract No. NE/2017/06: 09 November 2018.

 

Project Organizations

2.5              Different parties with different levels of involvement in the project organization include:

          Project Proponent Civil Engineering and Development Department (CEDD)

          The Engineer and the Engineers Representative (ER) AECOM

          Environmental Team (ET) Cinotech Consultants Limited (Cinotech)

          Independent Environmental Checker (IEC) AnewR Consulting Limited (AnewR)

 


2.6              The key contacts of the Project are shown in Table 2.1.

Table 2.1 Key Project Contacts

Party

Role

Contact Person

Phone No.

Fax No.

CEDD

Project Proponent

Mr. LO Sai Pak, Sunny

2301 1384

2739 0076

AECOM

Engineers Representative

Mr. KY Chan

3922 9000

2759 1698

Cinotech

Environmental Team

Dr. HF Chan

2151 2088

3107 1388

Mr. KS Lee

2151 2091

AnewR

Independent Environmental Checker

Mr. Adi Lee

2618 2836

3007 8648

Construction Activities undertaken during the Reporting Month

2.7              The major site activities undertaken in the reporting month included:

 

Table 2.2 Summary Table for Major Site Activities in the Reporting Month

Contract No.

Project Title

Site Activities (June 2020)

NE/2015/01

Tseung Kwan O Lam Tin Tunnel Main Tunnel and Associated Works

Lam Tin Interchange

1)    EHC2 U-Trough

2)    Site Formation Area 1G1, Area 1G2, Area 2, Area 3, Area 4 & Area 5

3)      Administration Building

Main Tunnel

4)    Main Tunnel Excavation

5)      Main Tunnel Lining Works

TKO Interchange

6)    Haul Road Construction and Site Formation & Slope Works

7)      Bridge Construction

8)      East Ventilation Building

NE/2015/02

Tseung Kwan O Lam Tin Tunnel Road P2 and Associated Works

1)          formation works, road and drainage for Road P2 CH500-CH650 and SR1

2)          R.C. Structure works for U-trough CH318 CH363.50

3)          Construction of utility trough and pre-cast concrete barrier at P2 U-trough CH411 CH500 and SR2 CH170 CH250

4)          Installation of socketed H-pile at S200 CH821 P2 CH105

5)          Pre-boring for sheetpile at S200 CH821 P2 CH105

6)          Pre-boring for sheetpile at storm water manhole 9101 9103

7)          Sloping seawall construction

8)          Removal of temporary cofferdam

9)          Backfilling the directional sign footing DS25, ADS22

10)      Sheetpile installation at S200 CH821-P2 CH105

11)      Installation of socketed H-pile at CT01 CH117 CH336

12)      TAM grouting works at CH105-CH318 cofferdam

13)      Excavation for abutment

14)      Construction of abutment

15)      Construction of barrier at CH500 CH650

16)      Drainage works at SR1 footpath / cycle truck

17)      Installation of ELS at cofferdam CH105 CH318

18)      Excavation of 3rd layer of ELS at CH105 CH318 cofferdam

19)      Backfilling works for reinstatement of Tong Yin Street

20)      Construction of storm water drain system for SHH 9101 9103

 

NE/2015/03

Tseung Kwan O Lam Tin Tunnel Northern Footbridge

The construction works under the contract had been completed in December 2019. Materials were being removed from works area.

NE/2017/01

Tseung Kwan O Lam Tin Tunnel Tseung Kwan O Interchange and Associated Works

1)      Construction of Pier

2)      Construction of Pier Head Works

3)      Bored Piling Works

4)      Segment Erection Works

5)      Dismantling of Temporary Working Platforms

NE/2017/02

Tseung Kwan O Lam Tin Tunnel Road P2/D4 and Associated Works

1)      Inspection pit excavation and utility diversion works

2)      Construction of drainage and watermain

3)      Pile cap

4)      Asphalt Paving

5)      Pier, Staircase and Lift Shalt Construction

6)      Road Works

7)      Pre-bored Socket-H Pile

NE/2017/06

Tseung Kwan O Lam Tin Tunnel Traffic Control and Surveillance System(TCSS) and Associated Works

Nil

 

2.8              The construction programme showing the inter-relationship with environmental protection/mitigation measures are presented in Table 2.3.

 

Table 2.3 Construction Programme Showing the Inter-Relationship with Environmental Protection/Mitigation Measures

Construction Works

Major Environmental Impact

Control Measures

As mentioned in Table 2.2

Noise, dust impact, water quality and waste generation

Ÿ   Sufficient watering of the works site with active dust emitting activities

Ÿ   Properly cover the stockpiles

Ÿ   On-site waste sorting and implementation of trip ticket system

Ÿ   Appropriate desilting/sedimentation devices provided on site for treatment before discharge

Ÿ   Use of quiet plant and well-maintained construction plant

Ÿ   Provide movable noise barrier

Status of Environmental Licences, Notification and Permits

2.9              A summary of the relevant permits, licences, and/or notifications on environmental protection for this Project is presented in Table 2.4.

 

Table 2.4 Summary of the Status of Environmental Licences, Notification and Permits

Contract No.

Permit / License No.

Valid Period

Status

From

To

Environmental Permit (EP)

N/A

EP-458/2013/C

20/1/2017

N/A

Valid

Notification pursuant to Air Pollution Control (Construction Dust) Regulation

NE/2015/01

EPD Ref no.: 405305

21/07/2016

N/A

Valid

EPD Ref no.: 405582

28/07/2016

N/A

Valid

NE/2015/02

EPD Ref no.: 406100

12/08/2016

N/A

Valid

NE/2015/03

EPD Ref no.: 416072

26/04/2017

N/A

Valid

NE/2017/02

EPD Ref no.: 429867

19/01/2018

N/A

Valid

NE/2017/01

EPD Ref no.: 430070

25/01/2018

N/A

Valid

Billing Account for Construction Waste Disposal

NE/2015/01

Account No. 7025431

11/07/2016

30/09/2020

Valid

NE/2015/02

Account No. 7025654

16/08/2016

N/A

Valid

NE/2015/03

Account No. 7026805

30/12/2016

N/A

Valid

NE/2017/02

Account No. 7029651

22/12/2017

N/A

Valid

NE/2017/01

Account No. 7029994

01/02/2018

N/A

Valid

NE/2017/06

Account No. 7032520

22/11/2018

N/A

Valid

Registration of Chemical Waste Producer

NE/2015/01

Waste Producer No. 5218-290-L2881-02

22/08/2016

N/A

Valid

Waste Producer No. 5213-833-L2532-03

22/08/2016

N/A

Valid

NE/2015/02

Waste Producer No. 5213-838-C4094-01

23/08/2016

N/A

Valid

NE/2015/03

Waste Producer No. 5213-265-W3435-04

19/07/2017

N/A

Valid

NE/2017/02

Waste Producer No. 5213-833-Z4004-04

01/02/2018

N/A

Valid

NE/2017/01

Waste Producer No. 5213-833-C4262-01

12/02/2018

N/A

Valid

Effluent Discharge License under Water Pollution Control Ordinance

NE/2015/01

WT00025806-2016

18/07/2018

30/11/2021

Valid

WT00026212-2016

16/05/2017

30/11/2021

Valid

WT00027354-2017

22/03/2017

31/03/2022

Valid

WT00027405-2017

22/03/2017

31/03/2022

Valid

WT00028495-2017

11/08/2017

31/08/2022

Valid

NE/2015/02

WT00026386-2016

15/12/2016

31/12/2021

Valid

WT00027226-2017

23/02/2017

28/02/2022

Valid

WT00030654-2018

16/04/2018

30/04/2023

Valid

NE/2015/03

WT00027295-2017

20/03/2017

31/03/2022

Valid

NE/2017/01

WT00030711-2018

11/04/2018

30/04/2023

Valid

WT00030716-2018

23/05/2018

31/05/2023

Valid

NE/2017/02

WT00030654-2018

16/04/2018

30/04/2023

Valid

Construction Noise Permit (CNP)

NE/2015/01

GW-RE1000-19

23/12/2019

22/06/2020

Expired on 22 Jun 20

GW-RE0110-20

05/03/2020

04/09/2020

Valid

GW-RE0120-20

04/03/2020

03/06/2020

Expired on 3 Jun 20

GW-RE0149-20

23/03/2020

22/09/2020

Valid

GW-RE0251-20

19/04/2020

31/05/2020

Expired on 31 May 20

GW-RE0323-20

15/05/2020

29/11/2020

Valid

GW-RE0362-20

21/05/2020

12/11/2020

Valid

GW-RE0366-20

21/05/2020

20/11/2020

Valid

GW-RE0397-20

27/05/2020

22/06/2020

Expired on 22 Jun 20

GW-RE0486-20

23/06/2020

21/12/2020

Valid

NE/2015/02

GW-RE0987-19

06/12/2019

01/06/2020

Expired on 1 Jun 20

GW-RE0995-19

15/12/2019

14/06/2020

Expired on 14 Jun 20

GW-RE0034-20

17/01/2020

13/07/2020

Valid

GW-RE0114-20

06/03/2020

05/09/2020

Valid

GW-RE0181-20

20/03/2020

10/09/2020

Valid

GW-RE0291-20

06/05/2020

15/10/2020

Valid

GW-RE0302-20

07/05/2020

10/10/2020

Valid

GW-RE0429-20

14/06/2020

13/09/2020

Valid

GW-RE0433-20

01/06/2020

25/11/2020

Valid

GW-RE0477-20

11/06/2020

13/09/2020

Valid

GW-RE0503-20

12/06/2020

04/12/2020

Valid

NE/2015/03

GW-RE0184-20

31/03/2020

30/06/2020

Valid

NE/2017/01

GW-RE0250-20

09/04/2020

30/09/2020

Valid

GW-RE0290-20

04/05/2020

03/11/2020

Valid

GW-RE0331-20

07/05/2020

03/11/2020

Valid

GW-RE0549-20

30/06/2020

28/12/2020

Valid

NE/2017/02

GW-RE0509-20

02/07/2020

30/09/2020

Valid

Marine Dumping Permit

NE/2017/01

EP/MD/21-011

N/A

N/A

N/A

Specified Process (SP) License

NE/2015/01

L-11-053

09/03/2018

08/03/2021

Valid

Summary of EM&A Requirements

2.10          The EM&A programme requires construction noise monitoring, air quality monitoring, water quality monitoring, environmental site audit, etc. The EM&A requirements for each parameter are described in the following sections, including:

 

          All monitoring parameters;

          Action and Limit levels for all environmental parameters;

          Event Action Plans;

          Environmental mitigation measures, as recommended in the Project EIA Report.

 

2.11          The advice on the implementation status of environmental protection and pollution control/mitigation measures is summarized in Section 10 of this report.

 

2.12          This report presents the monitoring results, observations, locations, equipment, period, methodology and QA/QC procedures of the monitoring parameters of the required environmental monitoring works and audit works for the Project in June 2020.


 

3.              AIR QUALITY

Monitoring Requirements

 

3.1              According to EM&A Manual of the Project, 1-hour and 24-hour TSP monitoring are required to monitor the air quality. For regular impact monitoring, a sampling frequency of at least once in every six days shall be undertaken at all of 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 shall be undertaken when the highest dust impact occurs. Appendix A shows the established Action/Limit Levels for the environmental monitoring works.

Monitoring Locations

 

3.2              Six designated monitoring stations were selected for air quality monitoring programme. Table 3.1 describes the air quality monitoring locations, which are also depicted in Figure 2.

 

Table 3.1 Locations for Air Quality Monitoring

Monitoring Stations

Location

Location of Measurement

AM1

Tin Hau Temple

Ground Level

AM2

Sai Tso Wan Recreation Ground

Ground Level

AM3

Yau Lai Estate Bik Lai House

Rooftop (41/F)

AM4(1)

Sitting-out Area at Cha Kwo Ling Village

Ground Level

AM4(A)(2) (*)

Cha Kwo Ling Public Cargo Working Area Administrative Office

Rooftop (3/F)

AM5(A)(*)

Tseung Kwan O DSD Desilting Compound

Ground Level

AM6(A) (*)

Park Central, L1/F Open Space Area

1/F

Remarks: (1) For 1-hour TSP monitoring; (2) For 24-hour TSP monitoring

(*) Air quality monitoring at designated station AM4(24-hr TSP), AM5 and AM6 was rejected by the premise owners. Therefore, baseline and impact air quality monitoring works were carried out at alternative air quality monitoring stations AM4(A) (24-hr TSP only), AM5(A) and AM6(A) respectively.

Monitoring Equipment

3.3              High Volume Samplers (HVS) were used to carry out 24-hour TSP monitoring. Direct reading dust meter were also used to measure 1-hour average TSP levels. The 1-hour sampling was determined periodically by HVS to check the validity and accuracy of the results measured by direct reading method.

 

3.4              Wind data monitoring equipment was set at rooftop (about 41/F) of Yau Lai Estate Bik Lai House for logging wind speed and wind direction such that the wind sensors are clear of obstructions or turbulence caused by building. The wind data monitoring equipment is re-calibrated at least once every six months and the wind directions are divided into 16 sectors of 22.5 degrees each. The location is shown in Figure 2.

 

3.5              Table 3.2 summarizes the equipment to be used in the air quality monitoring. Copies of calibration certificates are attached in Appendix B.

 

Table 3.2 Air Quality Monitoring Equipment

Equipment

Model and Make

Quantity

Calibrator

TISCH Model: TE-5025A

1

1-hour TSP Dust Meter

Sibata Model No.: LD-3B / LD-5R

3

Met One Instruments Model No.: AEROCET-831

0

Handheld Particle Counter Hal-HPC300 / Hal-HPC301

0

HVS Sampler

TISCH Model: TE-5170

1

GMW Model: GS2310

5

Wind Anemometer

Davis Weather Monitor II, Model no. 7440

1

Davis Weather Stations, Vantage Pro 2, Model No. 6152CUK

0

Monitoring Parameters and Frequency

3.6              Table 3.3 summarizes the monitoring parameters, monitoring period and frequencies of air quality monitoring.

 

Table 3.3 Frequency and Parameters of Air Quality Monitoring

Monitoring Stations

Parameter

Frequency

AM1, AM2, AM3, AM4, AM5(A) and AM6(A)

1-hour TSP

3 times per 6 days

AM1, AM2, AM3, AM4(A), AM5(A) and AM6(A)

24-hour TSP

Once per 6 days

Monitoring Methodology

1-hour TSP Monitoring

Measuring Procedures

3.7              The measuring procedures of the 1-hour dust meter are in accordance with the Manufacturers Instruction Manual as follows:

(Model LD3 / LD3B / LD5R)

Ÿ The 1-hour dust meter is placed at least 1.3 meters above ground.

Ÿ Set POWER to ON and make sure that the battery level was not flash or in low level.

Ÿ Allow the instrument to stand for about 3 minutes and then the cap of the air sampling inlet has been released.

Ÿ Push the knob at MEASURE position.

Ÿ Set time/mode setting to [BG] by pushing the time setting switch. Then, start the background measurement by pushing the start/stop switch once. It will take 6 sec. to complete the background measurement.

Ÿ Push the time setting switch to change the time setting display to [MANUAL] at the bottom left of the liquid crystal display. Finally, push the start/stop switch to stop the measuring after 1 hour sampling.

Ÿ Information such as sampling date, time, count value and site condition were recorded during the monitoring period.


(AEROCET-531)

Ÿ The 1-hour dust meter is placed at least 1.3 meters above ground.

Ÿ Remove the red rubber cap from the AEROCET-531 inlet nozzle.

Ÿ Turn on the power switch that is located on the right side of the AEROCET-531.

Ÿ On power up the product intro screen is displayed for 3 seconds. The intro screen displays the product name and firmware version.

Ÿ Then the main counter screen will be displayed.

Ÿ Press the START button. Internal vacuum pump start running. After 1 minute the pump will stop and the 0.5痠 and 5痠 channels will show the cumulative counts of particles larger than 0.5痠 and 5痠 per cubic foot.

Ÿ The AEROCET-531 is now checked out and ready for use.

Ÿ To switch off the AEROCET-531 power to stop the measuring after 1 hour sampling.

Ÿ Information such as sampling date, time, and display value and site condition were recorded during the monitoring period.

 

(Equipment: Hal Technology; Model no. Hal-HPC300 / Hal-HPC301)

Ÿ The 1-hour dust meter is placed at least 1.3 meters above ground.

Ÿ Set POWER to ON and make sure that the battery level was not flash or in low level.

Ÿ Allow the instrument to stand for about 3 minutes and then the cap of the air sampling inlet has been released.

Ÿ Push the knob at MEASURE position.

Ÿ Set time/mode setting to [BG] by pushing the time setting switch. Then, start the background measurement by pushing the start/stop switch once. It will take 6 sec. to complete the background measurement.

Ÿ Push the time setting switch to change the time setting display to [MANUAL] at the bottom left of the liquid crystal display. Finally, push the start/stop switch to stop the measuring after 1 hour sampling.

Ÿ Information such as sampling date, time, count value and site condition were recorded during the monitoring period.

Maintenance/Calibration

3.8              The following maintenance/calibration is required for the direct dust meters:

Ÿ Check and calibrate the meter by HVS to check the validity and accuracy of the results measured by direct reading method at 2-month intervals throughout all stages of the air quality monitoring.

 

24-hour TSP Monitoring

Instrumentation

 

3.9              High volume samplers (HVS) (TISCH Model: TE-5170 and GMW Model: GS2310) completed with appropriate sampling inlets were employed for 24-hour TSP monitoring. The sampler is composed of a motor, a filter holder, a flow controller and a sampling inlet and its performance specification complied with that required by USEPA Standard Title 40, Code of Federation Regulations Chapter 1 (Part 50).

 

3.10          The positioning of the HVS samplers are as follows:

  a horizontal platform with appropriate support to secure the samplers against gusty wind shall be provided;

  no two samplers shall be placed less than 2 meter apart

  the distance between the sampler and an obstacle, such as buildings, must be at least twice the height that the obstacle protrudes above the sampler;

  a minimum of 2 metres of separation from walls, parapets and penthouses is required for rooftop samplers;

  a minimum of 2 metres of separation from any supporting structure, measured horizontally is required;

  no furnace or incinerator flue is nearby;

  airflow around the sampler is unrestricted;

  the sampler is more than 20 metres from the dripline;

  any wire fence and gate, to protect the sampler, shall not cause any obstruction during monitoring;

  permission must be obtained to set up the samplers and to obtain access to the monitoring stations; and

  a secured supply of electricity is needed to operate the samplers.

Operating/analytical procedures for the operation of HVS

3.11          Prior to the commencement of the dust sampling, the flow rate of the high volume sampler was properly set (between 1.1 m3/min. and 1.4 m3/min.) in accordance with the manufacturer's instruction to within the range recommended in USEPA Standard Title 40, CFR Part 50.

 

3.12          For TSP sampling, fiberglass filters with a collection efficiency of > 99% for particles of 0.3μm diameter were used.

 

3.13          The power supply was checked to ensure the sampler worked properly. On sampling, the sampler was operated for 5 minutes to establish thermal equilibrium before placing any filter media at the designated air monitoring station.

 

3.14          The filter holding frame was then removed by loosening the four nuts and a weighted and conditioned filter was carefully centred with the stamped number upwards, on a supporting screen.

 

3.15          The filter was aligned on the screen so that the gasket formed an airtight seal on the outer edges of the filter. Then the filter holding frame was tightened to the filter holder with swing bolts. The applied pressure should be sufficient to avoid air leakage at the edges.

 

3.16          The shelter lid was closed and secured with the aluminium strip.

 

3.17          The timer was then programmed. Information was recorded on the record sheet, which included the starting time, the weather condition and the filter number (the initial weight of the filter paper can be found out by using the filter number).

 

3.18          After sampling, the filter was removed and sent to the HOKLAS laboratory (Wellab Ltd.) for weighing. The elapsed time will be also recorded.

 

3.19          Before weighing, all filters was equilibrated in a conditioning environment for 24 hours. The conditioning environment temperature should be between 25蚓 and 30蚓 and not vary by more than 3蚓; the relative humidity (RH) should be < 50% and not vary by more than 5%. A convenient working RH is 40%.

Maintenance/Calibration

3.20          The following maintenance/calibration is required for the HVS:

Ÿ  The high volume motors and their accessories will be properly maintained. Appropriate maintenance such as routine motor brushes replacement and electrical wiring checking will be made to ensure that the equipment and necessary power supply are in good working condition.

Ÿ  High volume samplers will be calibrated at bi-monthly intervals using TE-5025A Calibration Kit throughout all stages of the air quality monitoring.

Results and Observations

3.21          No Action/Limit Level exceedance was recorded for both 1-hour TSP and 24-hour TSP monitoring respectively.

 

3.22          The air temperature, precipitation and the relative humidity data was obtained from Hong Kong Observatory where the wind speed and wind direction were recorded by the installed Wind Anemometer at rooftop of Yau Lai Estate Bik Lai House (41/F). The location is shown in Figure 2. This weather information for the reporting month is summarized in Appendix C.

 

3.23          The monitoring data and graphical presentations of 1-hour and 24-hour TSP monitoring results are shown in Appendix E and Appendix F respectively.

 

 

3.24          According to our field observations, the major dust source identified at the designated air quality monitoring stations are as follows:

 

Table 3.4 Major Dust Source during Air Quality Monitoring

Station

Major Dust Source

AM1 Tin Hau Temple

Road Traffic at Cha Kwo Ling Road

AM2 Sai Tso Wan Recreation Ground

N/A

AM3 Yau Lai Estate Bik Lai House

Road Traffic near Eastern Cross Harbour Tunnel Toll Plaza

AM4 - Sitting-out Area at Cha Kwo Ling Village

Road Traffic at Cha Kwo Ling Road

AM4(A) - Cha Kwo Ling Public Cargo Working Area Administrative Office

Road Traffic at Cha Kwo Ling Road

AM5(A) - Tseung Kwan O DSD Desilting Compound

Vehicle Movement within the Desilting Compound

AM6(A) - Park Central, L1/F Open Space Area

Road Traffic at Po Yap Road



 

4.                  NOISE

Monitoring Requirements

 

4.1              According to EM&A Manual of the Project, construction noise monitoring was conducted to monitor the construction noise arising from the construction activities. The regular monitoring frequency for each monitoring station shall be on a weekly basis and conduct one set of measurements between 0700 and 1900 hours on normal weekdays. Appendix A shows the established Action and Limit Levels for the environmental monitoring works.

Monitoring Locations

4.2              Noise monitoring was conducted at 9 designated monitoring stations (CM1, CM2, CM3, CM4, CM5, CM6(A), CM7(A), CM8(A), CM9(A)) in the reporting period. Table 4.1 and Figure 3 show the locations of these stations.

 

Table 4.1 Noise Monitoring Stations

Monitoring Stations

Locations

Location of Measurement

CM1

Nga Lai House, Yau Lai Estate Phase 1, Yau Tong

Rooftop (41/F)

CM2

Bik Lai House, Yau Lai Estate Phase 1, Yau Tong

Rooftop (41/F)

CM3

Block S, Yau Lai Estate Phase 5, Yau Tong

Rooftop (40/F)

CM4

Tin Hau Temple, Cha Kwo Ling

Ground Level

CM5

CCC Kei Faat Primary School, Yau Tong

Rooftop (6/F)

CM6(A)*

Site Boundary of Contract No. NE/2015/02 near Tower 1, Ocean Shores

Ground Level

CM7(A)*

Site Boundary of Contract No. NE/2015/02 near Tower 7, Ocean Shores

Ground Level

CM8(A)*

Park Central, L1/F Open Space Area

1/F

CM9(A)1

Rooftop of Capri Tower 10

Rooftop (12/F)

Remarks:

* Noise monitoring at designated station CM6, CM7 & CM8 was rejected by the premise owners. Therefore, baseline and impact noise monitoring works were carried out at alternative noise monitoring stations CM6(A), CM7(A) and CM8(A) respectively.

1 Ad-hoc noise monitoring at station CM9(A) was commenced in September 2019.

 

4.3              Since the population intake of Capri had commenced during the construction of the TKOLTT, the noise monitoring work in daytime period was conducted at CM9(A) Rooftop of Capri Tower 10 on normal weekdays. The background Noise Level was recorded during the Lunch Hour of Construction Site (i.e. 12:00-13:00) and to be used as the referencing value for compliance checking for Noise Action and Limit Level.

Monitoring Equipment

4.4              Integrating Sound Level Meter was used for impact noise monitoring. The meters are Type 1 sound level meter capable of giving a continuous readout of the noise level readings including equivalent continuous sound pressure level (Leq) and percentile sound pressure level (Lx) that also complied with International Electrotechnical Commission Publications 651:1979 (Type 1) and 804:1985 (Type 1) specifications. Table 4.2 summarizes the noise monitoring equipment being used. Copies of calibration certificates are attached in Appendix B.

 

Table 4.2 Noise Monitoring Equipment

Equipment

Model and Make

Quantity

Integrating Sound Level Meter

SVAN 957/ 959 / 979

4

BSWA308 SLM

1

Calibrator

SV30A

1

Brel & Kj熳 4231

1

ST-120

2

 

4.5              Table 4.3 summarizes the monitoring parameters, frequency and total duration of monitoring. The noise monitoring schedule is shown in Appendix D. Additional weekly impact monitoring are carried out for evening time (1900 2300 hours) for monitoring stations CM1, CM2, CM3 & CM6(A) and night-time (2300 0700 hours) for monitoring stations CM1, CM2 & CM3.

 

Table 4.3 Frequency and Parameters of Noise Monitoring

Monitoring Stations

Parameter

Period

Frequency

Measurement

CM1

L10(30 min) dB(A)

L90(30 min) dB(A)

Leq(30 min) dB(A)