Executive Summary
1.1 Background
1.2 Scope of Report
1.3 Organization Structure
1.4 Summary of Construction Works
2.1 Air quality
2.2 Landfill Gas Hazard Monitoring
2.3 EM&A Site Inspection
2.4 Waste Management Status
2.5 Environmental Licenses and Permits
2.6 Implementation Status of Environmental Mitigation Measures
2.7 Summary of Exceedances of the Environmental Quality Performance Limit
2.8 Summary of Complaints, Notification of Summons and Successful Prosecutions
3.1 Construction Activities for the Coming Month
3.2 Key Issues for the Coming Month
4 Conclusions and recommendations
4.1 Conclusions
List of Appendices
Appendix A Project Organization for Environmental Works
Appendix B Construction Programmes
Appendix C Implementation Schedule of Environmental Mitigation Measures (EMIS)
Appendix D Summary of Action and Limit Levels
Appendix E Event Action Plan
Appendix F EM&A Monitoring Schedule
Appendix G Calibration Certificate of Monitoring Equipment
Appendix H Landfill Gas Monitoring Results and Graphical Presentation
Appendix I Monthly Summary of Waste Flow Table
Under Contract No. HY/2017/10, Gammon Construction Limited (GCL) is commissioned by the Highways Department (HyD) to undertake Northern Connection Tunnel Buildings, Electrical and Mechanical Works of the Tuen Mun – Chek Lap Kok Link Project (TM-CLK Link Project) while AECOM Asia Company Limited was appointed by HyD as the Engineer. For implementation of the environmental monitoring and audit (EM&A) programme under the Contract, ERM-Hong Kong, Limited (ERM) has been appointed as the Environmental Team (ET) in accordance with Environmental Permit No. EP-354/2009/A. Ramboll Hong Kong Ltd. was employed by HyD as the Independent Environmental Checker (IEC) and Environmental Project Office (ENPO). Subsequent applications for variation of environmental permits (VEP), EP-354/2009/B, EP-354/2009/C and EP-354/2009/D, were granted on 28 January 2014, 10 December 2014 and 13 March 2015, respectively.
The construction phase of the Contract commenced on 7 June 2018 and will tentatively be completed by 2021. The impact monitoring of the EM&A programme, including air quality and environmental site inspections, were commenced on 7 June 2018.
This is the Twenty-eighth Monthly EM&A report presenting the EM&A works carried out during the period from 1 to 30 September 2020 for the Contract No. HY/2017/10 Northern Connection Tunnel Buildings, Electrical and Mechanical Works (the “Contract”) in accordance with the Updated EM&A Manual of the TM-CLK Link Project. As informed by the Contractor, major activities in the reporting period included:
Land-based Works
· Handover Inspection at Main Control Building;
· Electrical and Mechanical Works at Ventilation Plant Room;
· Handover Inspection at North Ventilation Building;
· Handover Inspection at Administration Building;
· Handover Inspection at Maintenance Depot;
· Electrical and Mechanical Works and Architectural Builder's Work and Finishes at Fire Services Department Building;
· Electrical and Mechanical Works and Architectural Builder's Work and Finishes at Customs and Excise Department Building;
· Electrical and Mechanical Works and Architectural Builder's Work and Finishes at N1;
· Electrical and Mechanical Works at Kiosk N2;
· Electrical and Mechanical Works and Architectural Builder's Work and Finishes at the Tunnel;
· Electrical and Mechanical Works and Architectural Builder’s Work and Finishes at underpass at C3 area;
· Handover Inspection at Satellite Control Building;
· Electrical and Mechanical Works and Architectural Builder’s Work and Finishes at Kiosk S2;
· Handover Inspection at South Ventilation Building; and
· Soil Mix and Landscape Works at Northern Landfall and Southern Landfall.
A summary of monitoring and audit activities conducted in the reporting period is listed below ([1]):
24-hour TSP Monitoring 8 sessions
1-hour TSP Monitoring 8 sessions
Landfill Gas Hazard Monitoring 26 days
Joint Environmental Site Inspection 5 sessions
Summary of Breaches of Action/Limit Levels
Breaches of Action and Limit Levels for Air Quality
One (1) Action Level and one (1) Limit Level exceedance for 1-hour TSP were recorded by the Environmental Team of Contract No. HY/2012/08 during the reporting period. No exceedance of Action and Limit Levels for 24-hour TSP were recorded.
Breaches of Action Level for Landfill Gas Hazard Montioring
Results of landfill gas hazard monitoring in the reporting month complied with the Action Level.
Environmental Complaints, Non-compliance & Summons
There was no environmental complaint, notification of summons or successful prosecution recorded in the reporting period.
Reporting Change
There was no reporting change in the reporting period.
Upcoming Works for the Next Reporting Month
Works to be undertaken in the next monitoring period of October 2020 include the following:
Land-based Works
· Handover Inspection at Main Control Building;
· Handover Inspection at Ventilation Plant Room;
· Handover Inspection at North Ventilation Building;
· Handover Inspection at Administration Building;
· Handover Inspection at Maintenance Depot;
· Handover Inspection at Fire Services Department Building;
· Handover Inspection at Customs and Excise Department Building;
· Handover Inspection at N1;
· Handover Inspection at Kiosk N2;
· T&C and FSI at the Tunnel;
· Handover Inspection at underpass at C3 area;
· Handover Inspection at Satellite Control Building;
· Handover Inspection at Kiosk S2;
· Handover Inspection at South Ventilation Building; and
· Landscape Works at Northern Landfall and Southern Landfall.
Future Key Issues
Potential environmental impacts arising from the above upcoming construction activities in the next reporting month of October 2020 are mainly associated with dust, waste management and landfill gas monitoring issues.
According to the findings of the Northwest New Territories (NWNT) Traffic and Infrastructure Review conducted by the Transport Department, Tuen Mun Road, Ting Kau Bridge, Lantau Link and North Lantau Highway would be operating beyond capacity after 2016. This forecast has been based on the estimated increase in cross boundary traffic, developments in the Northwest New Territories (NWNT), and possible developments in North Lantau, including the Airport developments, the Lantau Logistics Park (LLP) and the Hong Kong – Zhuhai – Macao Bridge (HZMB). In order to cope with the anticipated traffic demand, two new road sections between NWNT and North Lantau – Tuen Mun – Chek Lap Kok Link (TM-CLKL) and Tuen Mun Western Bypass (TMWB) are proposed.
An Environmental Impact Assessment (EIA) of TM-CLKL (the Project) was prepared in accordance with the EIA Study Brief (No. ESB-175/2007) and the Technical Memorandum of the Environmental Impact Assessment Process (EIAO-TM). The EIA Report was submitted under the Environmental Impact Assessment Ordinance (EIAO) in August 2009. Subsequent to the approval of the EIA Report (EIAO Register Number AEIAR-146/2009), an Environmental Permit (EP-354/2009) for TM-CLKL was granted by the Director of Environmental Protection (DEP) on 4 November 2009, and EP variation (VEP) (EP-354/2009/A) was issued on 8 December 2010. Subsequent applications for variation of environmental permits (VEPs), EP-354/2009/B, EP-354/2009/C and EP-354/2009/D, were granted on 28 January 2014, 10 December 2014 and 13 March 2015, respectively.
Under Contract No. HY/2017/10, Gammon Construction Limited (GCL) is commissioned by the Highways Department (HyD) to undertake the Northern Connection Tunnel Buildings, Electrical and Mechanical Works of TM-CLKL while AECOM Asia Company Limited was appointed by HyD as the Engineer. For implementation of the environmental monitoring and audit (EM&A) programme under the Contract, ERM-Hong Kong, Limited (ERM) has been appointed as the Environmental Team (ET). Ramboll Hong Kong Ltd. was employed by HyD as the Independent Environmental Checker (IEC) and Environmental Project Office (ENPO).
The construction phase of the Contract commenced on 7 June 2018 and will be tentatively completed by 2021. The impact monitoring phase of the EM&A programme, including air quality and environmental site inspections, commenced on 7 June 2018.
The general layout plan of the Contract components is presented in Figures 1.1 & 1.2a to c.
The organization structure of the Contract is shown in Appendix A. The key personnel contact names and contact details are summarized in Table 1.1 below.
Table 1.1 Contact Information of Key Personnel
Party |
Position |
Name |
Telephone |
Fax |
HyD (Highways Department) |
Project Coordinator |
Joseph Lee |
2762 4958 |
3188 6614 |
|
Senior Engineer |
Cheng Pan
|
2762 3383 |
3188 6614 |
ER (AECOM Asia Company Limited)
|
Principle Resident Engineer |
S. W. Fok |
2293 6200 |
2293 6300 |
|
Resident Engineer
|
Desmond Fung |
2293 6200 |
2293 6300 |
ENPO / IEC (Ramboll Hong Kong Ltd.) |
ENPO Leader
|
Y.H. Hui |
3465 2850 |
3465 2899 |
IEC |
Manson Yeung |
9700 6767 |
3465 2899 |
|
|
|
|
|
|
Contractor (Gammon Construction Limited) |
Site Agent
|
H. H. Lee |
6096 6281 |
- |
Environmental Officer |
Max Poon |
9103 6303 |
- |
|
|
|
|
|
|
ET (ERM-HK) |
ET Leader |
Dr. Jasmine Ng |
2271 3311 |
2723 5660 |
|
|
|
|
|
|
The construction phase of the Contract commenced on 7 June 2018. The three-month rolling construction programme is shown in Appendix B.
As informed by the Contractor, details of the major works carried out in this reporting month are listed below:
Land-based Works
· Handover Inspection at Main Control Building;
· Electrical and Mechanical Works at Ventilation Plant Room;
· Handover Inspection at North Ventilation Building;
· Handover Inspection at Administration Building;
· Handover Inspection at Maintenance Depot;
· Electrical and Mechanical Works and Architectural Builder's Work and Finishes at Fire Services Department Building;
· Electrical and Mechanical Works and Architectural Builder's Work and Finishes at Customs and Excise Department Building;
· Electrical and Mechanical Works and Architectural Builder's Work and Finishes at N1;
· Electrical and Mechanical Works at Kiosk N2;
· Electrical and Mechanical Works and Architectural Builder's Work and Finishes at the Tunnel;
· Electrical and Mechanical Works and Architectural Builder’s Work and Finishes at underpass at C3 area;
· Handover Inspection at Satellite Control Building;
· Electrical and Mechanical Works and Architectural Builder’s Work and Finishes at Kiosk S2;
· Handover Inspection at South Ventilation Building; and
· Soil Mix and Landscape Works at Northern Landfall and Southern Landfall.
The locations of the construction activities are shown in Figure 1.3. The Environmental Sensitive Receivers in the vicinity of the Contract are shown in Figure 1.4.
Figure 1.3 Locations of Major Construction Activities in the Reporting Month
The EM&A programme required environmental monitoring for air quality and environmental site inspections for air quality, water quality and waste management. The EM&A requirements and related findings for each component are summarized in the following sections
In accordance with the Updated EM&A Manual and the Enhanced TSP Monitoring Plan, impact 1-hour TSP monitoring was conducted three (3) times every six (6) days and impact 24-hour TSP monitoring was carried out once every six (6) days when the highest dust impact was expected. 1-hr and 24-hr TSP monitoring frequency was increased to three times per day every three days and daily every three days, respectively, as excavation works for launching shaft under Contract No. HY/2012/08 Tuen Mun-Chek Lap Kok Link – Northern Connection Sub-sea Tunnel Section commenced on 24 October 2014.
Informed by the Environmental Team of Contract No. HY/2012/08 Tuen Mun-Chek Lap Kok Link – Northern Connection Sub-sea Tunnel Section, excavation works for lauching shaft were completed and notification of change on air quality monitoring frequency was submitted to EPD on 14 September 2020. 1-hr and 24-hr TSP monitoring frequency was changed to three times per day every six days and daily every six days, respectively, since 14 September 2020.
Results of air quality monitoring were adopted from the published EM&A data of Contract No. HY/2012/08 Tuen Mun-Chek Lap Kok Link – Northern Connection Sub-sea Tunnel Section ([2]).
The locations of the monitoring stations overlapped with Contract No. HY/2012/08 are shown in Figure 2.1 and presented in Table 2.1.
Table 2.1 Locations of Impact Air Quality Monitoring Stations and its Corresponding Monitoring Requirements
Monitoring Station |
Monitoring Dates |
Location |
Description |
Parameters & Frequency |
ASR1 |
2, 5, 8, 11, 14, 17, 23 and 29 September 2020 |
Tuen Mun Fireboat Station
|
Office |
TSP monitoring 1-hour Total Suspended Particulates (1-hour TSP, µg/m3), 3 times in every 6 days 24-hour Total Suspended Particulates (24-hour TSP, µg/m3), daily for 24-hour in every 6 days Enhanced TSP monitoring (commenced on 24 October 2014 under Contract No. HY/2012/08) 1-hour Total Suspended Particulates (1-hour TSP, µg/m3), 3 times in every 3 days 24-hour Total Suspended Particulates (24-hour TSP, µg/m3), daily for 24-hour in every 3 days |
ASR5 |
|
Pillar Point Fire Station
|
Office |
|
AQMS1 |
|
Previous River Trade Golf
|
Bare ground |
|
ASR6 |
|
Butterfly Beach Laundry
|
Office |
|
ASR10 |
|
Butterfly Beach Park |
Recreational uses |
One (1) Action Level and one (1) Limit Level exceedance for 1-hour TSP were recorded by the Environmental Team of Contract No. HY/2012/08 during the reporting period. No exceedance of Action and Limit Levels for 24-hour TSP were recorded. The exceedances were considered not related to this Contract upon further investigation and the investigation report is presented in Appendix J. No action is required to be undertaken in accordance with the Event Action Plan as presented in Appendix E.
In accordance with the Updated EM&A Manual of the TM-CLK Link Project, landfill gas hazard monitoring should be perform to ensure that the works area at Pillar Point Valley (PPV) Landfill is free of landfill gas. A total of 26 days of landfill gas hazard monitoring was conducted at Main Control Building during 1 to 30 September 2020 (Appendix F).
The landfill gas hazard monitoring was conducted in accordance to the Upated EM&A Manual with a Altair 5X Gas Detector. The calibration certificate for the equipment is presented in Appendix G.
The Action Level of the landfill gas hazard monitoring was adopted from the Updated EM&A Manual of the TM-CLK Link Project and are provided in Appendix D.
Results for landfill gas hazard monitoring are summarized in Table 2.2 and the monitoring data is provided in Appendix H.
Results of methane, oxygen and carbon dioxide in the reporting month complied with the Action Level. No action as stated in the Updated EM&A Manual of the TM-CLK Link Project and presented in Appendix D is required to be undertaken.
Table 2.2 Summary of Landfill Gas Hazard Monitoring Results in the Reporting Period
|
Average (%) |
Range (%) |
Action Level (%) (a) |
Methane |
0 |
0 |
10/20 |
Oxygen |
20.8 |
20.8-20.8 |
19/18 |
Carbon Dioxide |
0.03 |
0.03-0.03 |
0.5/1.5 |
Notes: (a) Depending on the results of the measurements, actions required will vary. Actions in the event of landfill gas being detected in excavation/confined area was adopted from the Updated EM&A Manual of the TM-CLK Link Project. |
Site inspections were carried out on a weekly basis to monitor the implementation of proper environmental pollution control and mitigation measures under the Contract. In the reporting month, five (5) site inspections were carried out on 4, 11, 18, 25 and 30 September 2020.
Key observations and recommendations during the site inspections in this reporting period are summarized in Table 2.3.
Table 2.3 Specific Observations and Recommendations during the Weekly Site Inspection in this Reporting Month
Inspection Date |
Observations |
Recommendations/ Remarks |
4 September 2020 |
Southern Landfall A chemical did not have clear identification label. |
Southern Landfall The Contractor was reminded to identify and clearly label the chemical. |
11 September 2020 |
Southern Landfall Drip tray was observed full of retained water. Chemical container was observed not placed on drip tray. |
Southern Landfall The Contractor was reminded to cleanup the drip tray. The Contractor was reminded to place chemical containers on drip tray. |
18 September 2020 |
South Ventilation Building Accumulated residuals were observed on site. |
South Ventilation Building The Contractor was reminded to keep better housekeeping. |
25 September 2020 |
Southern Landfall The stockpiles were not covered on site. |
Southern Landfall The Contractor was reminded to cover the stockpiles. |
30 September 2020 |
Fire Services Department Building Chemical containers were not placed on the drip tray. Customs and Excise Department Building Cement bags were not placed and covered properly. Southern Landfall Improper disposal of waste was observed. Mud was observed on the road. |
Fire Services Department Building The Contractor was reminded to place chemical containers on drip tray. Customs and Excise Department Building The Contractor was reminded to cover the cement bags. Southern Landfall The Contractor was reminded to dispose the recycling materials at designated location. The Contractor was reminded to clean the mud on the road and avoid carrying the mud to public road. |
The Contractor has rectified all of the observations as identified during environmental site inspections in the reporting month.
The Contractor had submitted application form for registration as chemical waste producer under the Contract. Sufficient numbers of receptacles were available for general refuse collection and sorting.
Wastes generated during this reporting period included mainly construction wastes (inert and non-inert). Reference has been made to the waste flow table prepared by the Contractor (Appendix I). The quantities of different types of wastes are summarized in Table 2.4.
Table 2.4 Quantities of Different Waste Generated in the Reporting Month
Month/Year |
Inert C&D Materials (a) (m3) |
Inert Construction Waste Re-used (m3) |
Non-inert Construction Waste (b) (kg) |
Imported Fill (m3) |
Recyclable Materials (c) (kg) |
Chemical Wastes (kg) |
|
|
|||||||
September 2020 |
33 |
0 |
89,120 |
0 |
0 |
0 |
|
|
Notes: |
|
|||||
|
(a) Inert construction wastes include hard rock and large broken concrete disposed as public fill. (b) Non-inert construction wastes include general refuse disposed at landfill. (c) Recyclable materials include metals, paper, cardboard, plastics, timber and others. |
|
|||||
The Contractor was advised to properly maintain on site C&D materials and waste collection, sorting and recording system, dispose of C&D materials and wastes at designated ground and maximize reuse/ recycle of C&D materials and wastes. The Contractor was also reminded to properly maintain the site tidiness and dispose of the wastes accumulated on site regularly and properly.
For chemical waste containers, the Contractor was reminded to treat properly and store temporarily in designated chemical waste storage area on site in accordance with the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.
The status of environmental licensing and permit is summarized in Table 2.5 below.
Table 2.5 Summary of Environmental Licensing and Permit Status
License/ Permit |
License or Permit No. |
Date of Issue |
Date of Expiry |
License/ Permit Holder |
Remarks |
Environmental Permit |
EP-354/2009/D |
13 March 2015 |
N/A |
HyD |
Tuen Mun- Chek Lap Kok Link |
APCO Construction Dust Notification |
433493 |
14 May 2018 |
N/A |
GCL |
For Tuen Mun working area |
Construction Waste Billing Account |
7030836 |
15 May 2018 |
N/A |
GCL |
N/A |
Chemical Waste Producer Registration |
5213-422-G2827-01 |
13 June 2018 |
N/A |
GCL |
N/A |
Discharge License under WPCO for Buildings at C2 area |
WT00031783-2018 |
22 October 2018 |
31 October 2023 |
GCL |
Sampling Frequency: Bimonthly |
Discharge License under WPCO for Buildings at C3 area |
WT00032062-2018 |
30 October 2018 |
31 October 2023 |
GCL |
Sampling Frequency: Quarterly |
Discharge License under WPCO for Southern Landfall |
WT00034878-2019 |
1 April 2020 |
31 March 2025 |
GCL |
Sampling Frequency: Quarterly |
Construction Noise Permit |
GW-RW0351-20 |
3 August 2020 |
29 January 2021 |
GCL |
For Northern Landfall and Tunnel |
Construction Noise Permit |
GW-RS0413-20 |
19 June 2020 |
15 December 2020 |
GCL |
For HKBCF Area
|
In response to the site audit findings, the Contractors carried out all corrective actions.
A summary of the Implementation Schedule of Environmental Mitigation Measures (EMIS) is presented in Appendix C. The necessary mitigation measures relevant to this Contract were implemented properly.
The landscape and visual (L&V) mitigation measures were also monitored on weekly basis in the reporting period. The monitoring status is summarized in Appendix C.
One (1) Action Level and one (1) Limit Level exceedance for 1-hour TSP were recorded by the Environmental Team of Contract No. HY/2012/08 during the reporting period. No exceedance of Action and Limit Levels for 24-hour TSP were recorded.
Results of landfill gas hazard monitoring in the reporting month complied with the Action Level.
Cumulative statistics are provided in Appendix J.
The Environmental Complaint Handling Procedure is provided in Figure 2.2.
There was no environmental complaint, notification of summons or successful prosecution recorded in the reporting period.
Statistics on complaints, notifications of summons, successful prosecutions are summarized in Appendix J.
As informed by the Contractor, the major works for the Contract in October 2020 will be:
· Handover Inspection at Main Control Building;
· Handover Inspection at Ventilation Plant Room;
· Handover Inspection at North Ventilation Building;
· Handover Inspection at Administration Building;
· Handover Inspection at Maintenance Depot;
· Handover Inspection at Fire Services Department Building;
· Handover Inspection at Customs and Excise Department Building;
· Handover Inspection at N1;
· Handover Inspection at Kiosk N2;
· T&C and FSI at the Tunnel;
· Handover Inspection at underpass at C3 area;
· Handover Inspection at Satellite Control Building;
· Handover Inspection at Kiosk S2;
· Handover Inspection at South Ventilation Building; and
· Landscape Works at Northern Landfall and Southern Landfall.
Potential environmental impacts arising from the above upcoming construction activities in the next reporting month of October 2020 are mainly associated with dust, waste management and landfill gas monitoring issues.
This Twenty-eighth Monthly EM&A Report presents the findings of the EM&A activities undertaken during the period from 1 to 30 September 2020, in accordance with the Updated EM&A Manual and the requirements of EP-354/2009/D.
Air quality (including 1-hour TSP and 24-hour TSP) monitoring were carried out in this reporting month.
One (1) Action Level and one (1) Limit Level exceedance for 1-hour TSP were recorded by the Environmental Team of Contract No. HY/2012/08 during the reporting period. No exceedance of Action and Limit Levels for 24-hour TSP were recorded.
Results of landfill gas hazard monitoring in the reporting month complied with the Action Level.
Environmental site inspection was carried out five (5) times in September 2020. Remedial actions recommended for the deficiencies identified during the site audits were properly implemented by the Contractor.
There was no environmental complaint, notification of summons or successful prosecution recorded in the reporting period.
The ET will keep track on the construction works to confirm compliance of environmental requirements and the proper implementation of all necessary mitigation measures.