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. 27

Monitoring Equipment 28

Monitoring Parameters and Frequency. 30

Monitoring Methodology. 31

Laboratory Analytical Methods. 31

QA/QC Requirements. 32

Decontamination Procedures. 32

Sampling Management and Supervision. 32

Results and Observations. 32

6. ECOLOGY.. 36

Post-Translocation Coral Monitoring. 36


 

7. cultural heritage.. 37

Monitoring Requirement 37

Monitoring Locations. 37

Monitoring Equipment 37

Monitoring Methodology. 38

Alert, Alarm and Action Levels. 38

Results. 38

Mitigation Measures for Cultural Heritage. 38

8. LANDSCAPE AND VISUAL IMPACT REQUIREMENTS. 39

9. LANDFILL GAS MONITORING.. 40

Monitoring Requirement 40

Monitoring Parameters and Frequency. 40

Monitoring Locations. 40

Monitoring Equipment 40

Results and Observations. 41

10. ENVIRONMENTAL AUDIT.. 42

Site Audits. 42

Implementation Status of Environmental Mitigation Measures. 42

11. WASTE MANAGEMENT.. 43

12. ENVIRONMENTAL NON-CONFORMANCE.. 44

Summary of Exceedances. 44

Summary of Environmental Non-Compliance. 44

Summary of Environmental Complaint 44

Summary of Environmental Summon and Successful Prosecution. 44

13. FUTURE KEY ISSUES. 45

Key Issues for the Coming Month. 46

14. CONCLUSIONS AND RECOMMENDATIONS. 48

Conclusions. 48

Recommendations. 49

 


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         Updated Noise Mitigation Plan (C2)

Appendix T         Cultural Heritage Monitoring Results

Appendix U       Piezometer Monitoring Results

Appendix V       Surface Management Plan

 

 


EXECUTIVE SUMMARY

Introduction

1.      This is the 45th 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 July 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

4

0

4

0

Refer to Appendix K & O

Marine Water Quality

54

193

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.      Four (4) 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- four (54) Action Level and one hundred and ninety-three (193) 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. No monitoring was conducted 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 29, 16, 16 and 16 July 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

July 2020

5

Air / Noise

Details refer to App O

Draft CIRs submitted/ On-going

June 2020

53

Air / Noise / Water/ Odour

Details refer to App O

Draft CIRs submitted

May 2020

53

Air / Noise

Details refer to App O

Draft CIRs submitted/ Closed

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

Closed

February 2020

4

Noise

Details refer to App O

Closed

January 2020

61

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.

3. One complaint was moved from June 2020 to May 2020 after investigation.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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

Dark smoke emission from barge

The dark smoke was originated from the barge. It is common for the barge to release certain amount of dark smoke when the engine is starting. The details shall be referred to CIR-A18.

NIL

Noise nuisance on weekdays & Breaking at early morning

Investigation undergoing

Noise nuisance on weekdays

Investigation undergoing

Squeaky noise during nighttime

The squeaky noise was produced by the wires used for tightening the barge during the typhoon. The details shall be referred to CIR-N110

The Contractor is reminded to relocate the barge to shelter if a typhoon is approaching to the proximity of Hong Kong.

Lam Tin Side

Noise Nuisance Suspected from Tunnel (C1)

Breaking work was conducted at the underground of Hong Oak Court. No non-conformance was identified.

The Contractor is reminded to strictly follow the requirement of CNP(s).

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 (July 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 (August 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;