TABLE OF CONTENTS

 

EXECUTIVE SUMMARY.. 1

Introduction. 1

Environmental Monitoring Works. 1

Key Information in the Reporting Quarter 2

1. INTRODUCTION.. 4

Background. 4

Project Organizations. 4

Construction Activities undertaken during the Report Quarter 4

2. ENVIRONMENTAL MONITORING AND AUDIT REQUIREMENTS. 5

Monitoring Parameters and Monitoring Locations. 5

Monitoring Methodology and Calibration Details. 5

Environmental Quality Performance Limits (Action and Limit Levels) 5

Implementation Status of Environmental Mitigation Measures. 5

Site Audit Summary. 5

Status of Waste Management 5

3. MONITORING RESULTS. 6

Weather Conditions. 6

Air Quality. 6

Construction Noise. 6

Water Quality. 9

Ecological Monitoring. 10

Monitoring on Cultural Heritage. 10

Landscape and Visual Monitoring and Audit 10

Landfill Gas Monitoring. 10

Waste Management 10

Influencing Factors on the Monitoring Results. 10

4. Non-compliance (exceedances) of the Environmental Quality Performance Limits (Action and Limit Levels) 13

Summary of Exceedances. 13

Review of the Reasons for and the Implications of Non-compliance. 13

Summary of Environmental Complaints and Prosecutions. 14

5. COMMENTS, CONCLUSIONS AND RECOMMENDATIONS. 15

Effectiveness of Mitigation Measures. 15

Recommendations. 15

 


LIST OF TABLE

 

Table I Summary Table for Non-compliance Recorded in the Reporting Quarter

Table II Summary Table for Key Information in the Reporting Quarter

Table 1.1 Key Project Contacts

Table 3.1 Summary of Weather Conditions in the Reporting Period

Table 3.2 Summary of Documented Complaints in August 2020

Table 3.3 Summary of Documented Complaints in September 2020

Table 3.4 Summary of Documented Complaints in October 2020

Table 3.5 Major Dust Sources during the Monitoring in the Reporting Period

Table 3.6 Major Noise Sources during the Monitoring in the 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 Location of Water Quality Monitoring in Temporary Embayment

 


LIST OF APPENDICES

 

A Monitoring Requirements

B Action and Limit Levels

C Graphical Presentation of Air Quality Monitoring Results

D Graphical Presentation of Noise Monitoring Results

E (Nil)

F Graphical Presentation of Marine Water Quality Monitoring Results

G Graphical Presentation of Landfill Gas Monitoring Results

H Site Audit Summary

I Environmental Mitigation Implementation Schedule (EMIS)

J Waste Generated Quantity

K Summary of Exceedances

L Summaries of Environmental Complaint, Warning, Summon and Notification of Successful Prosecution

M Summary Table for Major Site Activities undertaken in the Reporting Quarter

N Event and Action Plan

O Ecological Monitoring


EXECUTIVE SUMMARY

Introduction

1.      This is the 16th Quarterly 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 summary report presents the EM&A works performed in the period from August 2020 to October 2020.

 

2.      During the reporting quarter, the following works contracts were undertaken within the site:

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

       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.

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 in the reporting quarter for the Project is tabulated in Table I. Details of the environmental monitoring results is presented in Section 3.

 

Table I Non-compliance (Exceedance) Record for the Project in the Reporting Quarter

Parameter

No. of Exceedance

No. of Exceedance due to Construction Activities of this Project

Action Taken

Action Level

Limit Level

Action Level

Limit Level

August 2020

Air Quality

0

0

0

0

N/A

Noise

4

0

4

0

Refer to Appendix K & L

Marine Water Quality

39

108

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

September 2020

Air Quality

0

0

0

0

N/A

Noise

8

0

6

0

Refer to Appendix K & L

Marine Water Quality

43

137

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

October 2020

Air Quality

0

0

0

0

N/A

Noise

9

0

9

0

Refer to Appendix K & L

Marine Water Quality

37

122

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).

Key Information in the Reporting Quarter

5.      Summary of key information in the reporting quarter is tabulated in Table II.

 

Table II Summary Table for Key Information in the Reporting Quarter

Event

Event Details

Action Taken

Status

Remark

Number

Nature

Complaint received by Project Team / Complaint referred by EPD (August 2020)

6

Noise / Operation Hours / Water

Investigation Completed

Ongoing / Draft CIR submitted

Details refer to App L

Complaint received by Project Team / Complaint referred by EPD (September 2020)

9

Noise / Operation Hours / Water

Investigation Completed

Ongoing / Draft CIR submitted

Complaint received by Project Team / Complaint referred by EPD (October 2020)

11

Air / Noise

Ongoing / Investigation Completed

Ongoing / Draft CIR submitted

Reporting Changes

0

---

N/A

N/A

---

Notifications of any summons & prosecutions received (August 2020)

0

---

N/A

N/A

---

Notifications of any summons & prosecutions received (September 2020)

0

---

N/A

N/A

---

Notifications of any summons & prosecutions received (October 2020)

0

---

N/A

N/A

---

 

6.      Environmental monitoring works for the Project are considered effective and is generating data to categorically identify the environmental impacts from the works and influencing factors in the vicinity of monitoring stations.

 

 


1.                  INTRODUCTION

Background

1.1              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.

 

1.2              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.

 

1.3              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 November 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.

Project Organizations

1.4              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)

 

1.5              The key contacts of the Project are shown in Table 1.1.

 

Table 1.1 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 Report Quarter

1.6              The major site activities undertaken in the reporting quarter are shown in Appendix M.

 


2.                  ENVIRONMENTAL MONITORING AND AUDIT REQUIREMENTS

Monitoring Parameters and Monitoring Locations

 

2.1              The EM&A Manual designates locations for environmental monitoring in terms of air quality, noise, groundwater quality, water quality, ecology, cultural heritage and landfill gas due to the Project. The Project area and monitoring locations are depicted in Figures 1 - 6. Appendix A gives details of monitoring requirements. Locations of the environmental sensitive receivers are shown in Figures 3.1, 3.2, 4.1, 5.1, 6.2 and 9.2.

Monitoring Methodology and Calibration Details

 

2.2              Monitoring works/equipment were conducted/calibrated regularly in accordance with the EM&A Manual. Copies of calibration certificates are attached in the appendices of the Monthly EM&A Reports.

Environmental Quality Performance Limits (Action and Limit Levels)

 

2.3              The environmental quality performance limits, i.e. Action and Limit Levels were derived from the baseline monitoring results. Should the measured environmental quality parameters exceed the Action/Limit Levels, the respective action plans would be implemented. The Action/Limit Levels for each environmental parameter are given in Appendix B.

 

2.4              Should the monitoring results of the environmental monitoring parameters at any designated monitoring stations indicate that the Action / Limit Levels are exceeded, the actions in accordance with the Event and Action Plans in Appendix N was carried out.

Implementation Status of Environmental Mitigation Measures

 

2.5              Relevant mitigation measures as recommended in the project EIA report have been stipulated in the EM&A Manual for implementation by the Contractor. The implementation status of environmental mitigation measures (EMIS) is given in Appendix I.

Site Audit Summary

 

2.6              During site inspections in the reporting period, no non-compliances was recorded. The observations and recommendations made during the reporting period are summarized in Appendix H.

Status of Waste Management

 

2.7              The amount of wastes generated by the activities of the Work Contracts within TKO-LTT during the reporting period is shown in Appendix J.

 


3.                  MONITORING RESULTS

Weather Conditions

3.1              The weather during monitoring sessions was summarized in Table 3.1.

 

Table 3.1 Summary of Weather Conditions in the Reporting Period

Reporting Month

General Weather Conditions

August 2020

Sunny, Cloudy and Rainy

September 2020

Sunny, Cloudy and Rainy

October 2020

Sunny, Cloudy and Rainy

 

3.2              The detail of weather conditions for each individual monitoring session was presented in the monthly EM&A report.

Air Quality

3.3              All 1-hour TSP monitoring was conducted as scheduled in the reporting quarter. No Action/Limit Level exceedance was recorded.

 

3.4              All 24-hour TSP monitoring was conducted as scheduled in the reporting quarter. No Action / Limit Level exceedance was recorded.

 

3.5              The graphical presentations of the air quality monitoring results are shown in Appendix C.

Construction Noise

August 2020

3.6              All noise monitoring was conducted as scheduled in the reporting month. Four (4) Action Level exceedances were recorded due to the documented complaints received in this reporting month. No Limit Level exceedances for night-time construction noise monitoring were recorded. No Limit Level exceedance for day time was recorded in the reporting month. The summary of documented complaints and the complaint investigation in reporting month are tabulated in Table 3.2.

Table 3.2 Summary of Documented Complaints in August 2020

Complaint Type

Investigation Findings

Follow-up Action / Mitigation Measure

Lam Tin Side

Noise nuisance from tunnel works

Considered as project related. Breaking activities were conducted at the concerned locations during the period of complaint. The details shall be referred to CIR-N112.

Noise nuisance near East Habour Cross Tunnel

Tseung Kwan O Side

Suspected muddy water and worn out silt curtain

The suspected muddy water was due to the strong tidal movement under typhoon influence. The silt curtain was not deployed properly when the typhoon was landed. Details shall be referred to CIR-W15

The contractor is reminded to relocate the barge to shelter once a typhoon is approaching Hong Kong.

Working on restricted hours and public holiday

The working barge was believed to be working under the Cross Bay Link project. None of the barges working on the time of complaint belongs to TKOLTT project. Despite works had been conducted, no PME was turned on during the time of complaint. The details shall be referred to CIR-O4.

The contractor is reminded to strictly follow the CNMP/CNP and no PME is allowed to work on-site during public holidays without legal CNP.

Noise nuisance at morning (Late August 2020)

Considered as project related. Breaking activities were conducted at the concerned locations during the period of complaint. The details shall be referred to CIR-N114.

Long-term noise nuisance since early August

Considered as project related. Breaking activities were conducted at the concerned locations during the period of complaint. The details shall be referred to CIR-N113.

 

September 2020

3.7              All noise monitoring was conducted as scheduled in the reporting month. Six (6) Action Level exceedances were recorded due to the documented complaints received in this reporting month. No Limit Level exceedances for both day-time and night-time construction noise monitoring were recorded in the reporting month. The summary of documented complaints and the complaint investigations in reporting month are tabulated in Table 3.3.

Table 3.3 Summary of Documented Complaints in September 2020

Complaint Type

Investigation Findings

Follow-up Action / Mitigation Measure

Lam Tin Side

Noise nuisance near East Habour Cross Tunnel

Investigation showed the nuisance was generated by breaking works. The details shall be referred to CIR-N112

The contractor had promised to complete the semi-enclosure by October 2020.

Tseung Kwan O Side

Noise Nuisance throughout Sep Oct 2020

The complainant had repeatedly complaint about the continuous noise nuisace from September to October 2020. The CIR will be prepared in one-go.

Meanwhile, no action level of construction noise was recorded during noise monitoring; no non-compliance was identified during site inspection.

Squeaky noise at morning

The squeaky noise believed was coming from operating barges at C6. Details shall be referred to CIR-N115

No additional noise mitigation required as the Contractor follows the approved CNMP.

Suspected muddy water discharge

The muddy water was coming from DSD desilting compound. Details shall be referred to CIR-W16

N/A

Percussive noise nuisance at early morning

The complaint is considered as non-project-related as no direct evidence showing the noise nuisance originated from contracts under TKO-LTT project.

Continuous Noise Nuisance over Aug 2020

The investigation shows no non-compliance and action level for noise is triggered. The details shall be referred to CIR-N113

N/A

Noise nuisance on Sunday

Investigation result shows none of the contract under TKOLTT conducted works on Sunday. The details shall be referred to CIR-O5

N/A

 

October 2020

3.8              All noise monitoring was conducted as scheduled in the reporting month. Nine (9) Action Level exceedances were recorded due to the documented complaints received in this reporting month. No exceedances for daytime and night-time construction noise monitoring were. The summary of documented complaints and the complaint investigations in reporting month are tabulated in Table 3.4.

 

Table 3.4 Summary of Complaints Details in October 2020

Complaint Type

Investigation Findings

Follow-up Action / Mitigation Measure

Lam Tin Side

Noise Nuisance near Lam Tin Interchange (Late September to Early November)

Investigation showed the nuisance was generated by breaking works. The details shall be referred to CIR-C38 & N117. The contractor had completed the semi-enclosure in November 2020.

Air & Noise Nuisance near Lam Tin Interchange (October)

Tseung Kwan O Side

Noise nuisance at morning (Oct 2020)

The complainant had repeatedly complaint about the continuous noise nuisace from September to October 2020. The CIR will be prepared in one-go. Meanwhile, no action level of construction noise was recorded during noise monitoring; no non-compliance was identified during site inspection.

Noise nuisance at morning (Oct 2020)

Noise Nuisance from Excavation Works

Preliminary results show the noise source was from the backhoe at Portion IV. The details shall be referred to CIR-N118

The Contractor had applied mitigation measures such as adding lubricant to mounting parts to alleviate the problem.

Low-frequency noise at night (Oct-Nov 2020)

Preliminary results show the noise source was originated from the dewatering pumps. Both ER and the Contractor confirms that there was no malfuctioning pumps during the time of incident. Details shall be referred to CIR-N119.

NIL

Dust emission from construction works

Despite the contractor had sprinkle water regularly, the haul road was found dry during site audit session. The Contractor is reminded to sprinkle water more frequently and cover stockpiles of dusty material to reduce dust emission. The details shall be referred to CIR-A19.

NIL

 

3.9              The graphical presentations of the noise monitoring results are shown in Appendix D.

Water Quality

Exceedance Summary

 

August 2020

3.10          As for marine water quality monitoring, 39 and 108 action level and limit level exceedances in Monitoring Stations (M) were recorded.

 

September 2020

3.11          As for marine water quality monitoring, 43 and 137 action level and limit level exceedances in Monitoring Stations (M) were recorded.

 

October 2020

3.12          As for marine water quality monitoring, 37 and 122 action level and limit level exceedances in Monitoring Stations (M) were recorded.

 

Suspension of Groundwater Quality Monitoring

3.13          The groundwater monitoring was suspended since October 2019.

3.14          The monitoring results had been deemed non-representative of the impact from the project justified by two major factors: (1) influence on the monitoring results from non-project related factors, such as anthropogenic activities and natural phenomenon; and (2) large separation between the monitoring stations and works area. In addition, as no alternative locations for the groundwater quality monitoring were available, the groundwater quality monitoring has been suspended since January 2020 upon the agreement by EPD.

 

Observation and Exceedance Investigations

3.15          During this reporting quarter, 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 reclamation activities of the Project. The Contractor is reminded to deploy silt curtain properly when the barge enters/exits the embayment area. If possible, the Contractor shall also move the barge during high tide to prevent stirring up the sediments on sea bed.

3.16          Exceedances of turbidity and suspended solid were recorded on from various monitoring stations non-specifically among all stations including the control stations. Investigations over August - October 2020 showed that the range of SS levels recorded in reporting period remained consistent with the records in recent months. Since we officially entered the wet season, all Contractors are reminded to clear the drainage, repair any broken pipes/drainage and ensure there is embankment surrounding the works area to prevent accidental muddy water spillage or surface runoff due to heavy downpours. Details of the exceedance investigation report can be found in Appendix K.

3.17          The graphical presentations of the marine water quality monitoring results are shown in Appendix F. Embayment measurement at W1 was completed in December 2019.

 

Daily Piezometer Monitoring

 

3.18          Construction phase daily piezometer monitoring was carried out in the whole period whenever tunnel construction activities were carried out within +/- 50m of the piezometer gate in plan. The monitoring switched to monthly basis in 19 November 2018 as the construction activities were not within +/- 50m of the piezometer gate in plan. No Action or Limit Level exceedance was recorded in the reporting quarter.

Ecological Monitoring

3.19          Post-translocation 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 survey were completed in February 2017.

Monitoring on Cultural Heritage

3.20          Monitoring of vibration impacts at Cha Kwo Ling Tin Hau Temple commenced on 8 April 2017. No Alert Alarm and Action (AAA) Level exceedance was recorded in the reporting quarter.

Landscape and Visual Monitoring and Audit

3.21          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 Appendix H.

Landfill Gas Monitoring

3.22          Monitoring of landfill gases was commenced in March 2016 and were carried out by the Contractors at excavation location, Portion III in the reporting quarter. No Limit Level exceedance was recorded. The graphical presentations of the landfill gas monitoring results are shown in Appendix G.

Waste Management

3.23          Wastes generated from this Project include inert construction and demolition (C&D) materials, non-inert C&D materials and marine sediments. Details of waste management data is presented in Appendix I.

Influencing Factors on the Monitoring Results

3.24          During the reporting period, the major dust and noise source identified at the designated monitoring stations are as follows:

 

Table 3.5 Major Dust Sources during the Monitoring in the Reporting Period

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

 

 

Table 3.6 Major Noise Sources during the Monitoring in the Reporting Period

Monitoring Stations

Locations

Major Noise Source

CM1

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

Road Traffic near Eastern Cross Harbour Tunnel Toll Plaza

CM2

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

Road Traffic near Eastern Cross Harbour Tunnel Toll Plaza

CM3

Block S, Yau Lai Estate Phase 5, Yau Tong

Road Traffic near Eastern Cross Harbour Tunnel Toll Plaza

CM4

Tin Hau Temple, Cha Kwo Ling

Road Traffic at Cha Kwo Ling Road

CM5

CCC Kei Faat Primary School, Yau Tong

Road Traffic at Yau Tong Road

CM6(A)

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

Road Traffic at O King Road near Ocean Shores

CM7(A)

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

Road Traffic at Tong Yin Street

CM8(A)

Park Central, L1/F Open Space Area

Road Traffic at Po Yap Road

CM9(A)

Rooftop of Capri Tower 10

Rooftop (12/F)

 


 

4.                  NON-COMPLIANCE (EXCEEDANCES) OF THE ENVIRONMENTAL QUALITY PERFORMANCE LIMITS (ACTION AND LIMIT LEVELS)

Summary of Exceedances

4.1              Environmental monitoring works were performed in the reporting period and all monitoring results were checked and reviewed. A summary of exceedances is attached in Appendix K.

 

Air Quality

4.2              No Action/Limit Level exceedance was recorded in the reporting quarter.

 

Construction Noise

4.3              Nineteen (19) Action Level exceedances were recorded due to the documented complaints received in the reporting quarter. No Limit Level exceedances was recorded in monitoring stations for night time construction noise in the reporting quarter, however, they were considered due to the road traffic near Eastern Cross Harbour Tunnel Toll Plaza and therefore non-Project related. No Limit Level exceedance was recorded for day time construction noise in the reporting quarter.

 

Water Quality

4.4              The groundwater monitoring was suspended since October 2019.

 

4.5              One-Hundred and nineteen (119) Action Level exceedances and Three Hundred and Sixty-seven (367) Limit Level exceedances in Monitoring Stations (M) were recorded for marine water quality monitoring in the reporting quarter.

 

4.6              Ecological Monitoring

No action/limit level of mortality was exceeded in the monitoring survey conducted in the reporting quarter.

 

Monitoring on Cultural Heritage

4.7              No Alert Alarm and Action (AAA) Level exceedance was recorded in the reporting quarter.

 

Landscape and Visual

4.8              No non-compliance of the landscape and visual impact was recorded in the reporting quarter.

 

Landfill Gas

4.9              No Limit Level exceedance was recorded in the reporting quarter.

 

Review of the Reasons for and the Implications of Non-compliance

 

4.10          During site audits in the reporting quarter, no non-compliance was recorded. Recommendations made in each individual site audit session were attached in the Appendix H.


Summary of Environmental Complaints and Prosecutions

4.11          Twenty-six (26) cases of environmental complaints on this Project were received in the reporting quarter. The details were attached in the Appendix L.

 

4.12          No environmental prosecution was received in the reporting quarter.

5.                  COMMENTS, CONCLUSIONS AND RECOMMENDATIONS

Effectiveness of Mitigation Measures

 

5.1              The mitigation measures recommended in the EIA report are considered effective in minimizing environmental impacts.

 

5.2              The Contractor has implemented the recommended mitigation measures except those mitigation measures not applicable at this stage.

 

5.3              Environmental monitoring works were performed in the reporting quarter and all monitoring results were checked and reviewed.

 

5.4              The summary record of non-compliance (exceedances) of Action/Limit Level for environmental monitoring in the reporting quarter has been presented in Table I above and in Appendix K.

 

5.5              Twenty-six (26) cases of environmental complaints were received in the reporting quarter. The details were attached in the Appendix L.

 

5.6              No warning, notification of summon and environmental prosecution was received in the reporting quarter. The details were attached in the Appendix L.

Recommendations

5.7              Joint weekly site audits by the representatives of the Engineer, Contractor and the ET were conducted in the reporting quarter. The following recommendations was made to the Contractor for the coming reporting month:

 

Air Quality Impact

 

          To implement dust suppression measures such as water spray on all haul roads, stockpiles, dry surfaces, excavation and rock breaking works.

          To cover stockpile of dusty material by impervious material

          To properly display NRMM Label to Powered Mechanical Equipment on site

          To avoid smoke emission from Powered Mechanical Equipment on site

          To remove the dusty cement bags after use.

          To provide sand bag bunds to gullies at site access near the site office

          To provide top and three-side enclosure for grouting equipment on site

          To repair the gaps and the noise tarpaulin sheets to ensure the effectiveness of dust curtain.

 

Construction Noise

 

          Machines and plant (such as trucks) that may be in intermittent use should be shut down between works periods or should be throttled down to a minimum.

          To provide mitigation measures to PME as proposed in the approved NMP.

          To repair noise barrier of breaker on site.

          To provide proper acoustic material for enclosing the breaker head

 

 

Water Quality Impact

 

          To prevent any surface runoff discharge into any stream course or the waters in vicinity.

          To review and implement temporary drainage system.

          To ensure properly maintenance for de-silting facilities.

          To clear the silt and sediment in the sedimentation tanks or those accumulated in drainage.

          To provide bund to stockpile storage area on site to avoid leakage of surface runoff.

          To divert all the water generated from construction site to de-silting facilities with enough handling capacity before discharge.

          To provide and repair the silt curtain to fully enclose the site.

          To remove the dusty material to avoid mud/sand fall into the sea.

          To prevent silty water flow out of site during wheel washing

          To provide bunds or containment pit to prevent muddy water flow out of site.

          To remove the construction waste in U-channel.

          To set up proper drainage system within site.

          To cover or seal the gaps of covers of catchpit to prevent silt water or oil stain flow out of site.

          To remove the sand material deposited near the seafront.

          To provide sand bag bunds to gullies

          To cover exposed ground with tarpaulin and sandbag to avoid surface run-off

          Provide sufficient storage/diversion for storm water collected within the site during rainstorm, in order to avoid overflowing the water treatment tanks

 

Waste/Chemical Management

 

          To check for any accumulation of waste materials or rubbish on site.

          To avoid any discharge or accidental spillage of chemical waste or oil directly from the site.

          To avoid improper handling or storage of oil drum on site.

          To provide label to identify waste storage area within site.

          To remove oil stain mixed with muddy water within site.

          To provide drip tray to chemical containers

          To remove the construction material from drip tray and provide a plug for drip tray on site.

 

Landscape and Visual

 

          To remove the construction material near the tree and set up proper tree protection area

 

Permit/Licence

          To provide and display the Environmental Permit for the marine barge.

          To update the Environmental Permit displayed on crane barge.

 

Cultural Heritage

          To properly set up fenced-off buffer zone around Tin Hau Temple.