Expansion of Hong Kong International Airport into a Three-Runway System

Construction Phase Monthly EM&A Report No.13 (For January 2017)

February 2017

 

 

 

 

 

 

 

 

 

 

Contents

Executive Summary

1      Introduction

1.1    Background

1.2    Scope of this Report

1.3    Project Organisation

1.4    Summary of Construction Works

1.5    Summary of EM&A Programme Requirements

2      Air Quality Monitoring

2.1    Monitoring Stations

2.2    Monitoring Requirements and Schedule

2.3    Monitoring Equipment

2.4    Monitoring Methodology

2.4.1     Measuring Procedure

2.4.2     Maintenance and Calibration

2.5    Analysis and Interpretation of Monitoring Results

3      Noise Monitoring

3.1    Monitoring Stations

3.2    Monitoring Requirements and Schedule

3.3    Monitoring Equipment

3.4    Monitoring Methodology

3.4.1     Monitoring Procedure

3.4.2     Maintenance and Calibration

3.5    Analysis and Interpretation of Monitoring Results

4      Water Quality Monitoring

4.1    Monitoring Stations

4.2    Monitoring Requirements and Schedule

4.2.1     Action and Limit Levels for Water Quality Monitoring

4.3    Monitoring Equipment

4.4    Monitoring Methodology

4.4.1     Measuring Procedure

4.4.2     Maintenance and Calibration

4.4.3     Laboratory Measurement / Analysis

4.5    Analysis and Interpretation of Monitoring Results

4.5.1     Summary of Monitoring Results

4.5.2     Summary of Findings for Investigation of Exceedances

5      Waste Management

5.1    Monitoring Requirements

5.2    Waste Management Status

6      Chinese White Dolphin Monitoring

6.1    CWD Monitoring Requirements

6.2    CWD Monitoring Transects and Stations

6.2.1     Small Vessel Line-transect Survey

6.2.2     Land-based Theodolite Tracking

6.3    CWD Monitoring Methodology

6.3.1     Small Vessel Line-transect Survey

6.3.2     Photo Identification

6.3.3     Land-based Theodolite Tracking

6.4    Monitoring Results and Observations

6.4.1     Small Vessel Line-transect Survey

6.4.2     Photo Identification

6.4.3     Land-based Theodolite Tracking

6.5    Progress Update on Passive Acoustic Monitoring

6.6    Site Audit for CWD-related Mitigation Measures

6.7    Timing of Reporting CWD Monitoring Results

6.8    Summary of CWD Monitoring

7      Environmental Site Inspection and Audit

7.1    Environmental Site Inspection

7.2    Audit of Route Diversion and Speed Control of the SkyPier High Speed Ferries

7.3    Audit of Construction and Associated Vessels

7.4    Ecological Monitoring

7.5    Status of Submissions under Environmental Permits

7.6    Compliance with Other Statutory Environmental Requirements

7.7    Analysis and Interpretation of Complaints, Notification of Summons and Status of Prosecutions

7.7.1     Complaints

7.7.2     Notifications of Summons or Status of Prosecution

7.7.3     Cumulative Statistics

8      Future Key Issues and Other EIA & EM&A Issues

8.1    Construction Programme for the Coming Reporting Period

8.2    Key Environmental Issues for the Coming Reporting Period

8.3    Monitoring Schedule for the Coming Reporting Period

9      Conclusion and Recommendation

 

 

Tables

Table 1.1: Contact Information of Key Personnel 4

Table 1.2: Summary of status for all environmental aspects under the Updated EM&A Manual 6

Table 2.1:  Locations of Impact Air Quality Monitoring Stations  9

Table 2.2:  Action and Limit Levels for 1-hour TSP  9

Table 2.3:  Air Quality Monitoring Equipment 9

Table 2.4: Summary of 1-hour TSP Monitoring Results  10

Table 3.1: Locations of Impact Noise Monitoring Stations  11

Table 3.2: Action and Limit Levels for Construction Noise  11

Table 3.3: Noise Monitoring Equipment 12

Table 3.4: Summary of Construction Noise Monitoring Results  13

Table 4.1: Monitoring Locations and Parameters for Impact Water Quality Monitoring  14

Table 4.2: Action and Limit Levels for General Water Quality Monitoring and Regular DCM Monitoring  15

Table 4.3: The Control and Impact Stations during Flood Tide and Ebb Tide for General Water Quality Monitoring and Regular DCM Monitoring  16

Table 4.4: Water Quality Monitoring Equipment 16

Table 4.5: Other Monitoring Equipment 16

Table 4.6: Laboratory Measurement/ Analysis of SS and Heavy Metals  18

Table 4.7: Summary of Turbidity Compliance Status at IM and SR Stations (Mid-Ebb Tide) 18

Table 4.8: Summary of Findings from Investigations of Turbidity Exceedance during Mid-Ebb Tide  19

Table 4.9: Summary of SS Compliance Status at IM and SR Stations (Mid-Ebb Tide) 20

Table 4.10: Summary of SS Compliance Status at IM and SR Stations (Mid-Flood Tide) 22

Table 4.11: Summary of Nickel Compliance Status at IM Stations (Mid-Ebb Tide) 23

Table 4.12: Summary of Nickel Compliance Status at IM Stations (Mid-Flood Tide) 23

Table 4.13: Summary of Findings from Investigations of Nickel Exceedance during Mid-Flood Tide  24

Table 5.1: Action and Limit Levels for Construction Waste  26

Table 6.1: Derived Values of Action Level (AL) and Limit Level (LL) for Chinese White Dolphin Monitoring  27

Table 6.2: Coordinates of Transect Lines in NEL, NWL, AW, WL and SWL Survey Areas  28

Table 6.3: Land-based Survey Station Details  29

Table 6.4: Comparison of CWD Encounter Rates of the Whole Survey Area with Action Levels  33

Table 6.5: Summary of Photo Identification  34

Table 6.6: Summary of Survey Effort and CWD Group of Land-based Theodolite Tracking  34

Table 7.1: Summary of Key Audit Findings against the SkyPier Plan  39

Table 7.2: Status of Submissions under Environmental Permit 40

 

 

 

 

 

 

 

 

 

Figures

Figure 1.1- 1.2

Key Construction Areas in this reporting period

Figure 2.1

Locations of Air and Noise Monitoring Stations and Chek Lap Kok Wind Station

Figure 3.1

Figure 6.1

Figure 6.2

Figure 6.3

Figure 6.4


Figure 6.5

 

Figure 7.1

Locations of Water Quality Monitoring Stations 

Vessel based Dolphin Monitoring Transects in Baseline Monitoring

Land based Dolphin Monitoring in Baseline and Construction Phases

Sightings Distribution of Chinese White Dolphins

Plots of First Sightings of All CWD Groups obtained from Land-based Stations

Location for Autonomous Passive Acoustic Monitoring in Baseline and Construction Phases

Duration of the SkyPier HSFs travelled through the SCZ for 1 – 31 January 2017

 

Appendices

 

 

 

 

Appendix A

Environmental Mitigation Implementation Schedule (EMIS) for Construction Phase

Appendix B

Calibration Certificates

Appendix C

Monitoring Schedule

Appendix D

Monitoring Results

Appendix E

Status of Environmental Permits and Licences

Appendix F

Cumulative Statistics on Exceedances, Environmental Complaints, Notification of Summons and Status of Prosecutions

Appendix G

Data of SkyPier HSF Movements to/from Zhuhai and Macau (between 1 and 31 January 2017)

 

 

 

 

 

 

 

 

 

 

 

 


Executive Summary

The “Expansion of Hong Kong International Airport into a Three-Runway System” (the Project) serves to meet the future air traffic demands at Hong Kong International Airport (HKIA).  On 7 November 2014, the Environmental Impact Assessment (EIA) Report (Register No.: AEIAR-185/2014) for the Project was approved and an Environmental Permit (EP) (Permit No.: EP-489/2014) was issued for the construction and operation of the Project.

Airport Authority Hong Kong (AAHK) commissioned Mott MacDonald Hong Kong Limited (MMHK) to undertake the role of Environmental Team (ET) for carrying out the Environmental Monitoring & Audit (EM&A) works during the construction phase of the Project in accordance with the Updated EM&A Manual.

This is the 13th Construction Phase Monthly EM&A Report for the Project which summarizes the monitoring results and audit findings of the EM&A programme during the reporting period from 1 to 31 January 2017.

Key Activities in the Reporting Period

The key activities of the Project carried out in the reported period included five deep cement mixing (DCM) contracts and an advanced works contract.  The DCM contracts involved DCM trials, coring works, laying of geotextile and sand blanket; and the advanced works contract involved horizontal directional drilling (HDD) works including pilot hole drilling, reaming and pipeline supporting works.

EM&A Activities Conducted in the Reporting Period

The monthly EM&A programme was undertaken in accordance with the Updated EM&A Manual of the Project. During the reporting period, the ET conducted 33 sets of construction dust measurements, 20 sets of construction noise measurements, 13 events of water quality measurements, one round of terrestrial ecology monitoring on Sheung Sha Chau Island, two complete sets of small vessel line-transect surveys and five days of land-based theodolite tracking survey effort for Chinese White Dolphin (CWD) monitoring as well as landscape & visual and waste monitoring.

Weekly site inspections of the construction works were carried out by the ET to audit the implementation of proper environmental pollution control and mitigation measures for the Project. Bi-weekly site inspections were also conducted by the Independent Environmental Checker (IEC).  Observations have been recorded in the site inspection checklists, including the observations on dark smoke emission from the construction vessels and the condition of silt curtain for sand blanket laying are provided to the contractors together with the appropriate follow-up actions where necessary. 

On the implementation of Marine Mammal Watching Plan, silt curtains were in place by the contractors for sand blanket laying works and dolphin observers were deployed in accordance with the Plan. On the implementation of Dolphin Exclusion Zone (DEZ) Plan, dolphin observers were deployed by the contractors for continuous monitoring of the DEZ for DCM trial works in accordance with the DEZ Plan. Trainings for the proposed dolphin observers were provided by the ET prior to the aforementioned works, with the training records kept by the ET.  From the contractors’ daily observation records and DEZ monitoring log records, no dolphin or other marine mammals were observed within or around the DEZ and silt curtains in this reporting month. These contractors’ records were also audited by the ET during site inspection. Audits of acoustic decoupling for construction vessels were also carried out by the ET. 

On the implementation of the Marine Travel Routes and Management Plan for High Speed Ferries of SkyPier (the SkyPier Plan), the daily movements of all SkyPier High Speed Ferries (HSFs) in January 2017 were in the range of 83 to 91 daily movements, which are within the maximum daily cap of 125 daily movements. A total of 868 HSF movements under the SkyPier Plan were recorded in the reporting period. All HSFs had travelled through the Speed Control Zone (SCZ) with average speeds under 15 knots (7.8 to 14.3 knots), which were in compliance with the SkyPier Plan.  Two ferry movements with minor deviation from the diverted route are under investigation by ET. The investigation result will be presented in the next monthly EM&A report. In summary, the ET and IEC have audited the HSF movements against the SkyPier Plan and conducted follow up investigation or actions accordingly.

On the implementation of the Marine Travel Routes and Management Plan for Construction and Associated Vessel (MTRMP-CAV), ET had conducted weekly audit of relevant information, including Automatic Identification System (AIS) data, vessel tracks and other relevant records to ensure the contractors complied with the requirements of the MTRMP-CAV. Training has been provided for the concerned skippers to facilitate them in familiarising with the requirements of the MTRMP-CAV. 3-month rolling programmes for construction vessel activities were also received from contractors. ET had reminded contractors that all vessels shall avoid entering the Brothers Marine Park, which has been designated on 30 December 2016.

Results of Impact Monitoring

The monitoring works for construction dust, construction noise, water quality, construction waste, terrestrial ecology and CWD were conducted during the reporting period in accordance with the Updated EM&A Manual.

No exceedance of the Action or Limit Levels in relation to the construction dust, construction noise, construction waste and CWD monitoring was recorded in the reporting month. 

The water quality monitoring results for DO, total alkalinity and chromium obtained during the reporting period were in compliance with their corresponding Action and Limit Levels. For turbidity, SS and nickel, some of the testing results had exceeded the relevant Action or Limit Levels. Investigations were carried out immediately for each of the exceedance cases. The investigation findings concluded that the exceedances were not due to the Project.

The monthly terrestrial ecology monitoring on Sheung Sha Chau observed that installation of casing was conducted on the Island and there was no encroachment upon the egretry area nor any significant disturbance to the egrets foraging at Sheung Sha Chau by the works.

Summary of Upcoming Key Issues

Key activities anticipated in the next reporting period for the Project will include the following:

Advanced Works:

Contract P560 (R) Aviation Fuel Pipeline Diversion Works

    HDD pilot hole drilling and reaming;

    Pipeline supporting works; and

    Stockpiling of excavated materials from HDD operation.

Contract 3201 to 3205 DCM Works

    Laying of geotextile and sand blanket;

    Erection of site office;

    Coring works; and

    DCM trial works.

Contract 3206 Main Reclamation Works

    Erection of site office.

Other Works:

Contract 3213 CLP Cable Diversion Enabling Works

    Delivery of temporary power supply system

The key environmental issues will be associated with construction dust, construction noise, water quality, construction waste management, CWD and terrestrial ecology on Sheung Sha Chau. The implementation of required mitigation measures by the contractor will be monitored by the ET.

Dolphin Observer Training

Land-based CWD Monitoring

Meeting with SkyPier Ferry Operator Representatives

Summary Table

The following table summarizes the key findings of the EM&A programme during the reporting period from 1 to 31 January 2017:

 

Yes

No

Details

Analysis / Recommendation / Remedial Actions

Exceedance of Limit Level^

 

ü

No exceedance of project-related limit level was recorded.

Nil

Exceedance of Action Level^

 

ü

No exceedance of project-related action level was recorded.

Nil

Complaints Received

ü

 

A complaint of night time work and construction wastewater at Sheung Sha Chau was received on 19 Jan 2017.

The complaint investigation was carried out in accordance with the Complaint Management Plan. The investigation detail is presented in S7.7.1.

Notification of any summons and status of prosecutions

 

ü

Neither notifications of summons nor prosecution were received. 

Nil

Changes that affect the EM&A

 

ü

There were no changes to the construction works that may affect the EM&A

Nil

Remarks:   ^ only exceedance of action/ limit level related to Project works will be highlighted. 

1        Introduction

1.1         Background

On 7 November 2014, the Environmental Impact Assessment (EIA) Report (Register No.: AEIAR-185/2014) for the “Expansion of Hong Kong International Airport into a Three-Runway System” (the Project) was approved and an Environmental Permit (EP) (Permit No.: EP-489/2014) was issued for the construction and operation of the Project.

Airport Authority Hong Kong (AAHK) commissioned Mott MacDonald Hong Kong Limited (MMHK) to undertake the role of Environmental Team (ET) for carrying out the Environmental Monitoring & Audit (EM&A) works during the construction phase of the Project in accordance with the Updated EM&A Manual (the Manual) submitted under EP Condition 3.1.  The Manual is available on the Project’s dedicated website (accessible at: http://env.threerunwaysystem.com/en/index.html). AECOM Asia Company Limited (AECOM) was employed by AAHK as the Independent Environmental Checker (IEC) for the Project.

The Project covers the expansion of the existing airport into a three-runway system (3RS) with key project components comprising land formation of about 650 ha and all associated facilities and infrastructure including taxiways, aprons, aircraft stands, a passenger concourse, an expanded Terminal 2, all related airside and landside works and associated ancillary and supporting facilities.  The existing submarine aviation fuel pipelines and submarine power cables also require diversion as part of the works. 

Construction of the Project is to proceed in the general order of diversion of the submarine aviation fuel pipelines, diversion of the submarine power cables, land formation, and construction of infrastructure, followed by construction of superstructures.

The updated overall phasing programme of all construction works was presented in Appendix A of the Construction Phase Monthly EM&A Report No. 7 and the contract information was presented in Appendix A of the Construction Phase Monthly EM&A Report No.10.

1.2         Scope of this Report

This is the 13th Construction Phase Monthly EM&A Report for the Project which summarizes the key findings of the EM&A programme during the reporting period from 1 to 31 January 2017.

1.3         Project Organisation

The Project’s organization structure presented in Appendix B of the Construction Phase Monthly EM&A Report No.1 remained unchanged during the reporting month.  Contact details of the key personnel have been updated and is presented in Table 1.1

Table 1.1: Contact Information of Key Personnel

Party

Position

Name

Telephone

Project Manager’s Representative

(Airport Authority Hong Kong)

Senior Manager, Environment

Lawrence Tsui

2183 2734

Environmental Team (ET)

(Mott MacDonald Hong Kong Limited)

Environmental Team Leader

Terence Kong

2828 5919

 

Deputy Environmental Team Leader

Heidi Yu

2828 5704

 

Deputy Environmental Team Leader

Keith Chau

2972 1721

Independent Environmental Checker (IEC)

(AECOM Asia Company Limited)

Independent Environmental Checker

Jackel Law

3922 9376

 

 

Deputy Independent Environmental Checker

Joanne Tsoi

3922 9423

Advanced Works:

 

 

 

Contract P560(R) Aviation Fuel Pipeline Diversion Works

(Langfang Huayuan Mechanical and Electrical Engineering Co., Ltd.)

Project Manager

 

Wei Shih

 

2117 0566

 

Environmental Officer

Lyn Lau

 

5172 6543

 

DCM Works:

 

 

 

Contract 3201 DCM (Package 1)

(Penta-Ocean-China State-Dong-Ah Joint Venture)

Project Director

 

Tsugunari Suzuki

 

9178 9689

 

Environmental Officer

 

Kanny Cho

 

9019 1962

Contract 3202 DCM (Package 2)

(Samsung-BuildKing Joint Venture)

Project Manager

 

Ilkwon Nam

 

9643 3117

 

Environmental Officer

 

Dickson Mak

 

9525 8408

Contract 3203 DCM  (Package 3)

(Sambo E&C Co.,Ltd)

Project Manager

 

Seong Jae Park

 

9683 8693

 

Environmental Officer

 

Calvin Leung

 

9203 5820

Contract 3204 DCM  (Package 4)

(CRBC-SAMBO Joint Venture)

Project Manager

 

Kyung-Sik Yoo

 

9683 8697

 

 

Environmental Officer

David Man

6421 3238

Contract 3205 DCM (Package 5)

(Bachy Soletanche - Sambo Joint Venture)

Deputy Project Director

Min Park

 

9683 0765

 

Environmental Officer

 

Margaret Chung

9130 3696

Reclamation Work:

 

 

 

Contract 3206

(ZHEC-CCCC-CDC Joint Venture)

Project Manager

Kim Chuan Lim

 

3693 2288

 

Environmental Officer

Kwai Fung Wong

3693 2252

Other Works:

 

 

 

Contract 3213 CLP Cable Diversion Enabling Works (Wing Hing Construction Company)

Project Manager

 

Michael Kan

9206 0550

 

Environmental Officer

Ivy Tam

2151 2090

 

1.4         Summary of Construction Works

The key activities of the Project carried out in the reporting period included five DCM contracts and an advanced works contract.  The DCM contracts involved DCM trials, coring works, laying of geotextile and sand blanket; and the advanced works contract involved HDD works including stockpiling of excavated materials from HDD operation, pilot hole drilling, reaming and pipeline supporting works.

The active construction site is around 3 km and 900m away from the nearest air and noise sensitive receivers in Tung Chung and the villages in North Lantau. The locations of the works areas are presented in Figure 1.1 to Figure 1.2.

1.5         Summary of EM&A Programme Requirements

The status for all environmental aspects is presented Table 1.2. The EM&A requirements remained unchanged during the reporting period and details can be referred to Table 1.2 of the Construction Phase Monthly EM&A Report No. 1.

Table 1.2: Summary of status for all environmental aspects under the Updated EM&A Manual        

Parameters

Status

Air Quality

 

Baseline Monitoring

The baseline air quality monitoring result has been reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.4.

Impact Monitoring

On-going

Noise

 

Baseline Monitoring

The baseline noise monitoring result has been reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.4.

Impact Monitoring

On-going

Water Quality

 

General Baseline Water Quality Monitoring for reclamation, water jetting and field joint works

The baseline water quality monitoring result has been reported in Baseline Water Quality Monitoring Report and submitted to EPD under EP Condition

3.4.

General Impact Water Quality Monitoring for reclamation, water jetting and field joint works

On-going

Initial Intensive Deep Cement Mixing (DCM) Water Quality Monitoring

To be commenced according to the detailed plan on DCM

Early/ Regular DCM Water Quality Monitoring

On-going

Waste Management

 

Waste Monitoring

On-going

Land Contamination

 

Supplementary Contamination Assessment Plan (CAP)

To be submitted with the relevant construction works

Contamination Assessment Report (CAR) for Golf Course

The CAR for Golf Course was submitted to EPD.

Terrestrial Ecology

 

Pre-construction Egretry Survey Egretry Survey Plan

The revised Egretry Survey Plan was submitted and approved by EPD under EP Condition 2.14.

Ecological Monitoring

On-going

Marine Ecology

 

Pre-Construction Phase Coral Dive Survey

The Coral Translocation Plan was submitted and approved by EPD under EP Condition 2.12.

Coral Translocation

The coral translocation was completed on 5 January 2017.

Post-Translocation Coral Monitoring

The first post- translocation coral monitoring was commenced on 20 January 2017.

Chinese White Dolphins (CWD)

Vessel Survey, Land-based Theodolite Track and Passive Acoustic Monitoring (PAM)

Baseline Monitoring

Baseline CWD results were reported in the CWD Baseline Monitoring Report and submitted to EPD in accordance with EP Condition 3.4.

Impact Monitoring

On-going

Landscape & Visual

 

Baseline Monitoring

The baseline landscape & visual monitoring result has been reported in Baseline Monitoring Report and submitted to EPD under EP Condition 3.4.

Impact Monitoring

On-going

Environmental Auditing

 

Regular site inspection

On-going

Marine Mammal Watching Plan (MMWP) implementation measures

On-going

Dolphin Exclusion Zone Plan (DEZP) implementation measures

On-going

SkyPier High Speed Ferries (HSF) implementation measures

On-going

Construction and Associated Vessels Implementation measures

On-going

Complaint Hotline and Email channel

On-going

Environmental Log Book

On-going

Taking into account the construction works in this reporting month, impact monitoring of air quality, noise, water quality, waste management, ecology, CWD and landscape & visual were carried out in the reporting month.

The EM&A programme also involved weekly site inspections and related auditings conducted by the ET for checking the implementation of the required environmental mitigation measures recommended in the approved EIA Report.  In order to enhance environmental awareness and closely monitor the environmental performance of the contractors, environmental briefings and regular environmental management meetings were conducted.

The EM&A programme has been following the recommendations presented in the approved EIA Report and the Updated EM&A Manual. A summary of implementation status of the environmental mitigation measures for the construction phase of the Project during the reporting period is provided in Appendix A.

2        Air Quality Monitoring

2.1         Monitoring Stations

Air quality monitoring was conducted at two representative monitoring stations in the vicinity of air sensitive receivers in Tung Chung and villages in North Lantau in accordance with the Updated EM&A Manual. Table 2.1 describes the details of the monitoring stations. Figure 2.1 shows the locations of the monitoring stations.

Table 2.1:  Locations of Impact Air Quality Monitoring Stations

Monitoring Station

Location

AR1A

Man Tung Road Park

AR2

Village House at Tin Sum

2.2         Monitoring Requirements and Schedule

In accordance with the Updated EM&A Manual, baseline 1-hour total suspended particulate (TSP) levels at the two air quality monitoring stations were established as presented in the Baseline Monitoring Report. Impact 1-hour TSP monitoring was conducted for three times every 6 days. The Action and Limit Levels of the air quality monitoring are provided in Table 2.2

The air quality monitoring schedule involved in the reporting period is provided in Appendix C.

Table 2.2:  Action and Limit Levels for 1-hour TSP

Monitoring Station

Action Level (mg/m3)

Limit Level (mg/m3)

AR1A

306

500

AR2

298

2.3         Monitoring Equipment

Portable direct reading dust meter was used to carry out the 1-hour TSP monitoring. Details of equipment are given in Table 2.3.

Table 2.3:  Air Quality Monitoring Equipment

Equipment

Brand and Model                  

Last Calibration Date                  

Portable direct reading dust meter (Laser dust monitor)

SIBATA LD-3B-002

(Serial No. 974350)

26 Oct 2016

2.4         Monitoring Methodology

2.4.1      Measuring Procedure

The measurement procedures involved in the impact 1-hr TSP monitoring can be summarised as follows: 

a.   The portable direct reading dust meter was mounted on a tripod at a height of 1.2 m above the ground.

b.   Prior to the measurement, the equipment was set up for 1 minute span check and 6 second background check.

c.   The one hour dust measurement was started. Site conditions and dust sources at the nearby area were recorded on a record sheet.

d.   When the measurement completed, the “Count” reading per hour was recorded for result calculation.

2.4.2      Maintenance and Calibration

The portable direct reading dust meter is calibrated every year against high volume sampler (HVS) to check the validity and accuracy of the results measured by direct reading method. The

calibration certificates of the portable direct reading dust meter and calibration record of the  HVS provided in Appendix B of the Construction Phase Monthly EM&A Report No.11 are still valid. Any updates of calibration certificates will be reported in the Monthly EM&A report if necessary.

2.5         Analysis and Interpretation of Monitoring Results

The monitoring results for 1-hour TSP are summarized in Table 2.4. Detailed impact monitoring results are presented in Appendix D.

Table 2.4: Summary of 1-hour TSP Monitoring Results

Monitoring Station

1-hr TSP Concentration Range (mg/m3)

Action Level (mg/m3)

Limit Level (mg/m3)

AR1A

26 - 131

306

500

AR2

25 - 205

298

No exceedance of the Action / Limit Level was recorded at all monitoring stations in the reporting period.

General meteorological conditions throughout the impact monitoring period were recorded. Wind data for each monitoring day including wind speed and wind direction was collected from the Chek Lap Kok Wind Station.

 

 

3        Noise Monitoring

3.1         Monitoring Stations

Noise monitoring was conducted at five representative monitoring stations in the vicinity of noise sensitive receivers in Tung Chung and villages in North Lantau in accordance with the Updated EM&A Manual. Figure 2.1 shows the locations of the monitoring stations and these are described in Table 3.1 below. As described in Section 4.3.3 of the Updated EM&A Manual, monitoring at NM2 will commence when the future residential buildings in Tung Chung West Development become occupied.

Table 3.1: Locations of Impact Noise Monitoring Stations

Monitoring Station

Location

Type of measurement

NM1A

Man Tung Road Park

Free field

NM2(1)

Tung Chung West Development

To be determined

NM3A

Site Office

Facade  

NM4

Ching Chung Hau Po Woon Primary School

Free field

NM5

Village House in Tin Sum

Free field

NM6

House No. 1, Sha Lo Wan

Free field

Note: (1) As described in Section 4.3.3 of the Updated EM&A Manual, noise monitoring at NM2 will only commence after occupation of the future Tung Chung West Development.

3.2         Monitoring Requirements and Schedule

In accordance with the Updated EM&A Manual, baseline noise levels at the noise monitoring stations were established as presented in the Baseline Monitoring Report (Version 1 dated December 2015). Impact noise monitoring was conducted once per week in the form of 30-minute measurements of Leq, L10 and L90 levels recorded at each monitoring station between 0700 and 1900 on normal weekdays. The Action and Limit levels of the noise monitoring are provided in Table 3.2. The construction noise monitoring schedule involved in the reporting period is provided in Appendix C.

Table 3.2: Action and Limit Levels for Construction Noise

Monitoring Stations

Time Period

Action Level

Limit Level, Leq(30mins) dB(A)

NM1A, NM2, NM3A, NM4, NM5 and NM6

0700-1900 hours on normal weekdays

When one documented

complaint is received from

any one of the sensitive

receivers

75 dB(A)(i)

Note: (i) reduce to 70dB(A) for school and 65dB(A) during school examination periods.

3.3         Monitoring Equipment

Noise monitoring was performed using sound level meter at each designated monitoring station.  The sound level meters deployed comply with the International Electrotechnical Commission Publications 651:1979 (Type 1) and 804:1985 (Type 1) specifications.  Acoustic calibrator was used to check the sound level meters by a known sound pressure level for field measurement.  Details of equipment are given in Table 3.3.

Table 3.3: Noise Monitoring Equipment

Equipment

Brand and Model

Last Calibration Date

Integrated Sound Level Meter

B&K 2238 (Serial No. 2800932)

19 Jul 2016

B&K 2238 (Serial No. 2381580)

8 Sep 2016

 

Acoustic Calibrator

B&K 4231 (Serial No. 3003246)

16 May 2016

B&K 4231 (Serial No. 3004068)

19 Jul 2016

 

 

 

 

 

 

3.4         Monitoring Methodology

3.4.1      Monitoring Procedure

The monitoring procedures involved in the noise impact monitoring can be summarised as follows: 

a.   The sound level meter was set on a tripod at least a height of 1.2 m above the ground for free-field measurements at monitoring stations NM1A, NM4, NM5 and NM6. A correction of +3 dB(A) was applied to the free field measurements.

b.   Façade measurements were made at the monitoring station NM3A.

c.   Parameters such as frequency weighting, time weighting and measurement time were set.

d.   Prior to and after each noise measurement, the meter was calibrated using the acoustic calibrator.  If the difference in the calibration level before and after measurement was more than 1 dB(A), the measurement would be considered invalid and repeat of noise measurement would be required after re-calibration or repair of the equipment.

e.   During the monitoring period, Leq, L10 and L90 were recorded.  In addition, site conditions and noise sources were recorded on a record sheet.

f.    Noise measurement results were corrected with reference to the baseline monitoring levels.

g.   Observations were recorded when high intrusive noise (e.g. dog barking, helicopter noise) was observed during the monitoring.

3.4.2      Maintenance and Calibration

The maintenance and calibration procedures are summarised below:

a.   The microphone head of the sound level meter was cleaned with soft cloth at regular intervals.

b.   The meter and calibrator were sent to the supplier or laboratory accredited under Hong Kong Laboratory Accreditation Scheme (HOKLAS) to check and calibrate at yearly intervals.

Calibration certificates of the sound level meters and acoustic calibrators used in the noise monitoring provided in Appendix B of the Construction Phase Monthly EM&A Report No.8& 9 are still valid. Any updates of calibration certificates will be reported in the Monthly EM&A report if necessary.

3.5         Analysis and Interpretation of Monitoring Results

The construction noise monitoring results are summarized in Table 3.4 and the detailed monitoring data are provided in Appendix D.

Table 3.4: Summary of Construction Noise Monitoring Results

Monitoring Station

Noise Level Range, dB(A)

Leq (30 mins)

Limit Level, dB(A)

Leq (30 mins)

NM1A(i)

71 - 72

75

NM3A

57 - 63

75

NM4(i)

63 - 66

70(ii)

NM5(i)

53 - 58

75

NM6(i)

62 - 73

75

Note:      (i) +3 dB(A) Façade correction included;

               (ii) Reduced to 65 dB(A) during school examination periods. 

As the construction activities were far away from the monitoring stations, major sources of noise dominating the monitoring stations observed during the construction noise impact monitoring were aircraft noise at NM3A and NM5, aircraft noise and helicopter noise at NM6, road traffic noise at NM1A and school activities at NM4 in this reporting month. 

No exceedance of the Action/ Limit Level was recorded at all monitoring stations in the reporting period.

 

 

4        Water Quality Monitoring

4.1         Monitoring Stations

Water quality monitoring was conducted at a total of 22 water quality monitoring stations, comprising 12 impact stations, seven sensitive receiver stations and three control stations in the vicinity of water quality sensitive receivers around the airport island in accordance with the Updated EM&A Manual. Table 4.1 describes the details of the monitoring stations. Figure 3.1 shows the locations of the monitoring stations. 

Table 4.1: Monitoring Locations and Parameters for Impact Water Quality Monitoring

 

Monitoring Stations

Description

Coordinates

Parameters

Easting

Northing

C1

Control

804247

815620

DO, pH, Temperature, Salinity, Turbidity, SS, Total Alkalinity, Heavy Metals(2)

C2

Control

806945

825682

C3(3)

Control

817803

822109

IM1

Impact

806458

818351

IM2

Impact

806193

818852

IM3

Impact

806019

819411

IM4

Impact

805039

819570

IM5

Impact

804924

820564

IM6

Impact

805828

821060

IM7

Impact

806835

821349

IM8

Impact

807838

821695

IM9

Impact

808811

822094

IM10

Impact

809838

822240

IM11

Impact

810545

821501

IM12

Impact

811519

821162

SR1(1)

Future Hong Kong-Zhuhai-Macao Bridge Hong Kong Boundary Crossing Facilities (HKBCF) Seawater Intake for cooling

812586

820069

DO, pH, Temperature, Salinity, Turbidity, SS

 

SR2(3)

Planned marine park / hard corals at The Brothers / Tai Mo To

814166

821463

SR3

Sha Chau and Lung Kwu Chau Marine Park / fishing and spawning grounds in North Lantau

807571

822147

SR4A

Sha Lo Wan

807810

817189

SR5A

San Tau Beach SSSI

810696

816593

SR6

Tai Ho Bay, Near Tai Ho Stream SSSI

814663

817899

SR7

Ma Wan Fish Culture Zone (FCZ)

823742

823636

SR8

Seawater Intake for cooling at Hong Kong International Airport (East)

811593

820417

Notes:   

(1) The seawater intakes of SR1 for the future HKBCF is not yet in operation, hence no water quality impact monitoring was conducted at this station. The future permanent location for SR1 during impact monitoring is subject to finalisation after the HKBCF seawater is commissioned.

 (2) Details of selection criteria for the two heavy metals for early regular DCM monitoring refer to the Detailed Plan on Deep Cement Mixing available on the dedicated 3RS website http://env.threerunwaysystem.com/en/ep-submissions.html). DCM specific water quality monitoring parameters (total alkalinity and heavy metals) were only conducted at C1 to C3, SR2, and IM1 to IM12 .

(3) According to the Baseline Water Quality Monitoring Report, C3 station is not adequately representative as a control  station of impact/ SR stations during the flood tide. The control reference has been changed from C3 to SR2 from 1 September 2016  onwards.

4.2         Monitoring Requirements and Schedule

In accordance with the Updated EM&A Manual, baseline water quality levels at the abovementioned representative water quality monitoring stations were established as presented in the Baseline Water Quality Monitoring Report.

General water quality monitoring and early regular DCM water quality monitoring were conducted three days per week, at mid-flood and mid-ebb tides, at the 22 water quality monitoring stations during the reporting period. The sea conditions varied from calm to rough, and the weather conditions varied from sunny to rainy during the monitoring period.

The water quality monitoring schedule for the reporting period is provided in Appendix C.

4.2.1      Action and Limit Levels for Water Quality Monitoring

The Action and Limit Levels for general water quality monitoring and regular DCM monitoring are presented in Table 4.2. The control and impact stations during flood tide and ebb tide for general water quality monitoring and regular DCM monitoring are presented in Table 4.3.

Table 4.2: Action and Limit Levels for General Water Quality Monitoring and Regular DCM Monitoring

Parameters

Action Level (AL)

Limit Level (LL)

Action and Limit Levels for general water quality monitoring and regular DCM monitoring

(excluding SR1& SR8)

DO in mg/L

(Surface, Middle & Bottom)

Surface and Middle

4.5 mg/L

Surface and Middle

4.1 mg/L

5 mg/L for Fish Culture Zone (SR7) only

Bottom

3.4 mg/L

Bottom

2.7 mg/L

Suspended Solids (SS) in mg/L

23

or 120% of upstream control station at the same tide of the same day, whichever is higher

37

or 130% of upstream control station at the same tide of the same day, whichever is higher

Turbidity in NTU

22.6

36.1

Total Alkalinity in ppm

95

99

Representative Heavy Metals for early regular DCM monitoring

(Chromium)

0.2

0.2

Representative Heavy Metals for early regular DCM monitoring

(Nickel)

3.2

 

3.6

 

Action and Limit Levels SR1

 

 

 

SS (mg/l)

To be determined prior to its commissioning

To be determined prior to its commissioning

Action and Limit Levels SR8

 

 

 

 

SS (mg/l)

52

 

60

 

Notes:

(1) For DO measurement, non-compliance occurs when monitoring result is lower than the limits.

(2)For parameters other than DO, non-compliance of water quality results when monitoring results is higher than the limits.

(3)Depth-averaged results are used unless specified otherwise.

(4)Details of selection criteria for the two heavy metals for early regular DCM monitoring refer to the Detailed Plan on Deep Cement Mixing available on the dedicated 3RS website http://env.threerunwaysystem.com/en/ep-submissions.html)

(5)The action and limit levels for the two representative heavy metals chosen will be the same as that for the intensive DCM monitoring.

Table 4.3: The Control and Impact Stations during Flood Tide and Ebb Tide for General Water Quality Monitoring and Regular DCM Monitoring

 

Control Station

Impact Stations

Flood Tide

 

C1

IM1, IM2, IM3, IM4, IM5, IM6, IM7, IM8, SR3

SR2^1

IM7, IM8, IM9, IM10, IM11, IM12, SR1A, SR3, SR4A, SR5A, SR6, SR8

Ebb Tide

 

C1

SR4A, SR5A, SR6

C2

IM1, IM2, IM3, IM4, IM5, IM6, IM7, IM8, IM9, IM10, IM11, IM12, SR1A, SR2, SR3, SR7, SR8

^1 As per findings of Baseline Water Quality Monitoring Report, the control reference has been changed from C3 to SR2 from 1 Sep 2016 onwards.

4.3         Monitoring Equipment

Table 4.4 summarises the equipment used for monitoring of specific water quality parameters under the impact water quality monitoring programme.

Table 4.4: Water Quality Monitoring Equipment

Equipment

Brand and Model

Last Calibration Date

Multifunctional Meter (measurement of DO, pH, temperature, salinity and turbidity)

YSI 6920 V2  (serial no. 11F100014)

4 Jan 2017

YSI 6920 V2  (serial no. 16G104518)

4 Jan 2017

YSI 6920 V2  (serial no. 0001C6A7)

4 Jan 2017

YSI 6920       (serial no. 000109DF)

4 Jan 2017

Digital Titrator (measurement of total alkalinity)

Titrette Digital Burette 50ml Class A

(serial no.10N65665)

5 Jan 2017

 

Other equipment used as part of the impact water quality monitoring programme are listed in Table 4.5

Table 4.5: Other Monitoring Equipment

Equipment

Brand and Model

Water Sampler

Van Dorn Water Sampler

Positioning Device (measurement of GPS)

Garmin eTrex Vista HCx

Current Meter (measurement of current speed and direction, and water depth)

Sontek HydroSurveyor

 

 

4.4         Monitoring Methodology

4.4.1      Measuring Procedure

Water quality monitoring samples were taken at three depths (at 1m below surface, at mid-depth, and at 1m above bottom) for locations with water depth >6m. For locations with water depth between 3m and 6m, water samples were taken at two depths (surface and bottom). For locations with water depth <3m, only the mid-depth was taken. Duplicate water samples were taken and analysed.

The water samples for all monitoring parameters were collected, stored, preserved and analysed according to the Standard Methods, APHA 22nd ed. and/or other methods as agreed by the EPD. In-situ measurements at monitoring locations including temperature, pH, DO, turbidity, salinity and water depth were collected by equipment listed in Table 4.4 and Table 4.5. Water samples for heavy metals and SS analysis were stored in high density polythene bottles with no preservative added, packed in ice (cooled to 4 ºC without being frozen), delivered to the laboratory within 24 hours of collection.

4.4.2      Maintenance and Calibration

Calibration of In-situ Instruments

All in-situ monitoring instrument were checked, calibrated and certified by a laboratory accredited under HOKLAS before use. Responses of sensors and electrodes were checked with certified standard solutions before each use.

Wet bulb calibration for a DO meter was carried out before commencement of monitoring and after completion of all measurements each day. Calibration was not conducted at each monitoring location as daily calibration is adequate for the type of DO meter employed. A zero check in distilled water was performed with the turbidity probe at least once per monitoring day. The probe was then calibrated with a solution of known NTU. In addition, the turbidity probe was calibrated at least twice per month to establish the relationship between turbidity readings (in NTU) and levels of suspended solids (in mg/L).  Accuracy check of the digital titrator was performed at least once per monitoring day.

The calibration certificates of the monitoring equipment used in the reporting month is updated and provided in Appendix B.

4.4.3      Laboratory Measurement / Analysis

Analysis of SS and heavy metals have been carried out by a HOKLAS accredited laboratory, ALS Technichem (HK) Pty Ltd (Reg. No. HOKLAS 066). Sufficient water samples were collected at all the monitoring stations for carrying out the laboratory SS and heavy metals determination. The SS and heavy metals determination works were started within 24 hours after collection of the water samples. The analysis of SS and heavy metals have followed the standard methods summarised in Table 4.6. The QA/QC procedures for laboratory measurement/ analysis of SS and heavy metals were presented in Appendix F of the Construction Phase Monthly EM&A Report No.8.

Table 4.6: Laboratory Measurement/ Analysis of SS and Heavy Metals

Parameters

Instrumentation

Analytical Method

Reporting Limit

Suspended Solid (SS)

Analytical Balance

APHA 2540D

2 mg/L

Heavy Metals

 

 

 

Chromium (Cr)

ICP-MS

USEPA 6020A

0.2 µg/L

Nickel (Ni)

ICP-MS

USEPA 6020A

0.2 µg/L

4.5         Analysis and Interpretation of Monitoring Results

4.5.1      Summary of Monitoring Results 

The water quality monitoring results for DO, total alkalinity and chromium obtained during the reporting period were in compliance with their corresponding Action and Limit Levels. For turbidity, SS, and nickel, some of the testing results had exceeded the relevant Action or Limit Levels. Details of the exceedances are presented in Section 4.5.2

All the water quality monitoring results and graphical presentations are provided in Appendix D.

4.5.2      Summary of Findings for Investigation of Exceedances

During the reporting month, water quality monitoring was conducted at 12 impact stations (IM), seven sensitive receiver (SR) stations and three control stations in accordance with the Updated EM&A Manual. The purpose of water quality monitoring at the IM stations is to promptly capture any potential water quality impacts from the Project before the impacts could become apparent at sensitive receivers (represented by the SR stations).

During the monitoring period in January 2017, testing results exceeding the corresponding Action or Limit Levels were recorded on nine monitoring days. Details of the exceedance cases are presented below.

Findings for Turbidity Exceedances (Mid-Ebb Tide)

Table 4.7 presents a summary of the turbidity compliance status at IM and SR stations during mid-ebb tide for the reporting month. There were no turbidity exceedances at any IM and SR stations during mid-flood tide for the reporting month.

Table 4.7: Summary of Turbidity Compliance Status at IM and SR Stations (Mid-Ebb Tide)

Date

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

SR2

SR3

SR4A

SR5A

SR6

SR7

SR8

03/01/2017

 

 

 

 

 

 

 

05/01/2017

 

 

 

 

 

 

 

 

07/01/2017

 

 

 

 

 

 

 

10/01/2017

 

 

 

 

 

 

 

12/01/2017

 

 

 

 

 

 

 

14/01/2017

 

 

 

 

 

 

 

 

 

 

17/01/2017

 

 

 

 

 

 

 

19/01/2017

 

 

 

 

 

 

 

21/01/2017

 

 

 

 

 

 

 

24/01/2017

 

 

 

 

 

 

 

26/01/2017

 

 

 

 

 

 

 

28/01/2017

 

 

 

 

 

 

 

31/01/2017

 

 

 

 

 

 

 

No. of  Turbidity Exceedances

0

0

0

0

0

0

0

1

1

1

1

0

0

1

0

0

0

0

0

Note: Detailed results are presented in Appendix D.

Legend:

 

No exceedance of Action Level and Limit Level

 

Exceedance of Action Level recorded at monitoring station located downstream of the 3RS Project based on dominant tidal flow

 

Exceedance of Action Level recorded at monitoring station located upstream of the 3RS Project based on dominant tidal flow

 

Exceedance of Limit Level recorded at monitoring station located downstream of the 3RS Project based on dominant tidal flow

 

Exceedance of Limit Level recorded at monitoring station located upstream of the 3RS Project based on dominant tidal flow

 

Upstream station with respect to 3RS Project during the respective tide based on dominant tidal flow

IM Stations

As shown in Table 4.7, exceedances of Action or Limit Level at IM stations were recorded on 31 Jan 2017. Repeat turbidity measurement was conducted at IM8, IM9, IM10, IM11 and SR3 on 1 February 2017 during ebb tide in accordance with the Event and Action Plan of the Updated EM&A Manual. Some of the exceedances occur at monitoring stations which are located upstream of the 3RS Project during ebb tide. As such upstream stations would unlikely be affected by the Project, the investigation focused on the exceedance at IM station located downstream of the Project and hence might be affected by the Project’s construction activities.

As part of the investigation on the downstream exceedance events, details of the Project’s marine construction activities on this monitoring day was collected, as well as any observations during the monitoring. The findings are summarised Table 4.8.

Table 4.8: Summary of Findings from Investigations of Turbidity Exceedance during Mid-Ebb Tide

Date

Marine construction works nearby

Approximate distance from marine construction works*

Status of silt curtains (if applicable)

Construction vessels in the vicinity

Silt plume observed

Exceedance due to Project

31/01/2017

DCM works

Around 500 m

Deployed and maintained properly

No

No

No

Note:

*This refers to the approximate distance between the DCM works and the nearest monitoring stations with exceedance

According to the investigation findings summarized in Table 4.8, it was confirmed that the silt curtain was deployed and maintained properly for DCM works, and no silt plume was observed at the active DCM works area, even though silt plume occurred in the vicinity of IM11 during monitoring. This suggests that the silt plume at IM11 was unlikely generated by the construction works.  Repeat turbidity measurement was conducted on 1 February 2017 at the monitoring stations recorded with exceedances on 31 January 2017 in accordance with the Event and Action Plan of the Updated EM&A Manual. No exceedance was recorded during repeated measurement.

High level of turbidity at IM11 may be contributed by similarly high turbidity levels at upstream stations (IM8 to IM10) on the same day. Given that IM8 to IM10 are located upstream of the Project during ebb tide, and high turbidity levels were apparent at these locations (which would unlikely be affected by the Project), the exceedance at IM11 was possibly due to natural fluctuation in this area. Based on these findings, the exceedance was considered not due to the Project.

SR Stations

At SR stations, exceedance was observed at SR3, however, SR3 is located upstream of the project during ebb tide, hence the exceedance at SR3 is unlikely to be due to the Project. As the repeat turbidity measurements conducted on 1 February 2017 showed no further exceedance, the single exceedance at SR3 may be due to natural fluctuation.

Findings for SS Exceedances (Mid-Ebb Tide)

Table 4.9 presents a summary of the SS compliance status at IM and SR stations during mid-ebb tide for the reporting month.

Table 4.9: Summary of SS Compliance Status at IM and SR Stations (Mid-Ebb Tide)

Date

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

SR2

SR3

SR4A

SR5A

SR6

SR7

SR8

03/01/2017

 

 

 

 

 

 

 

05/01/2017

 

 

 

 

 

 

 

 

07/01/2017

 

 

 

 

 

 

 

10/01/2017

 

 

 

 

 

 

 

12/01/2017

 

 

 

 

 

 

 

14/01/2017

 

 

 

 

 

 

 

 

 

 

17/01/2017

 

 

 

 

 

 

 

19/01/2017

 

 

 

 

 

 

 

21/01/2017

 

 

 

 

 

 

 

24/01/2017

 

 

 

 

 

 

 

26/01/2017

 

 

 

 

 

 

 

28/01/2017

 

 

 

 

 

 

 

31/01/2017

 

 

 

 

 

 

 

No. of  SS Exceedances

0

1

1

0

0

3

1

1

1

0

1

0

0

1

0

0

0

0

0

Note: Detailed results are presented in Appendix D.

Legend:

 

No exceedance of Action Level and Limit Level

 

Exceedance of Action Level recorded at monitoring station located downstream of the 3RS Project based on dominant tidal flow

 

Exceedance of Action Level recorded at monitoring station located upstream of the 3RS Project based on dominant tidal flow

 

Upstream station with respect to 3RS Project during the respective tide based on dominant tidal flow

IM Stations

As shown in Table 4.9, exceedances of Action Levels at IM stations were recorded on three monitoring days. However, some of the exceedances occur at monitoring stations which are located upstream of the 3RS Project during ebb tide. As such upstream stations would unlikely be affected by the Project, the investigation focused on the exceedances at IM stations located downstream of the Project and hence might be affected by the Project’s construction activities.

According to the investigation finding summarized in Table 4.8, the silt curtain was deployed and maintained properly for the DCM works, and no silt plume was observed at the active DCM works area. The silt plume observed in the vicinity of IM11 was thus unlikely generated by the construction works.

High levels of SS at IM2, IM3 and IM11 may be contributed by similarly high SS at upstream stations (IM6 to IM9) on the same day. Given that IM6 to IM9 are located upstream of the Project during ebb tide, and high SS levels were apparent at these locations (which would unlikely be affected by the Project), the exceedances at IM2, IM3 and IM11 were possibly due to natural fluctuation in this area. Based on these findings, the exceedances were considered not due to the Project.

SR Stations

At SR stations, exceedance was observed at SR3, however, SR3 is located upstream of the project during ebb tide, hence the exceedance at SR3 is unlikely to be due to the Project. In addition, it is noted that similarly high SS levels were observed at this SR station during baseline monitoring, which suggested that such SS elevation is not uncommon under ambient conditions due to natural fluctuation. Given these findings, the exceedance at SR3 was considered not due to the Project.

Findings for SS Exceedances (Mid-Flood Tide)

Table 4.10 presents a summary of the SS compliance status at IM and SR stations during mid-flood tide for the reporting month.

Table 4.10: Summary of SS Compliance Status at IM and SR Stations (Mid-Flood Tide)

Date

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

SR2

SR3

SR4A

SR5A

SR6

SR7

SR8

03/01/2017

 

 

 

 

 

 

 

05/01/2017

 

 

 

 

 

 

 

07/01/2017

 

 

 

 

 

 

 

10/01/2017

 

 

 

 

 

 

 

12/01/2017

 

 

 

 

 

 

 

14/01/2017

 

 

 

 

 

 

 

17/01/2017

 

 

 

 

 

 

 

19/01/2017

 

 

 

 

 

 

 

21/01/2017

 

 

 

 

 

 

 

24/01/2017

 

 

 

 

 

 

 

26/01/2017

 

 

 

 

 

 

 

28/01/2017

 

 

 

 

 

 

 

31/01/2017

 

 

 

 

 

 

 

No. of  SS Exceedances

0

2

1

0

0

0

0

0

0

0

0

0

0

0

0

0

4

0

0

Note: Detailed results are presented in Appendix D.

Legend:

 

No exceedance of Action Level and Limit Level

 

Exceedance of Action Level recorded at monitoring station located downstream of the 3RS Project based on dominant tidal flow

 

Exceedance of Action Level recorded at monitoring station located upstream of the 3RS Project based on dominant tidal flow

 

Exceedance of Limit Level recorded at monitoring station located downstream of the 3RS Project based on dominant tidal flow

 

Exceedance of Limit Level recorded at monitoring station located upstream of the 3RS Project based on dominant tidal flow

 

Upstream station with respect to 3RS Project during the respective tide based on dominant tidal flow

IM Stations

As shown in Table 4.10, exceedances of Action Level at IM stations were recorded on two monitoring days. However, all exceedances occurred at monitoring stations which are located upstream of the 3RS Project during flood tide. Such upstream stations are unlikely to be affected by the Project. Nevertheless as a prudent measure, the Project’s activities on these monitoring days were investigated and it was confirmed that silt curtains were deployed and maintained properly and no silt plumes were observed.

Based on these findings and given that exceedances were only observed at monitoring stations located upstream of the Project, these exceedances were considered not due to the Project.

SR Stations

At SR stations, exceedances were recorded at SR6 during mid-flood tide for the reporting month. SR6 is located upstream of the project during flood tide, hence the exceedances at SR6 are unlikely to be due to the Project. In addition, it is noted that similarly high SS levels were observed at this SR station during baseline monitoring, which suggested that such SS elevation is not uncommon under ambient conditions due to natural fluctuation. Given these findings, the exceedances at the SR station was considered not due to the Project.

Findings for Nickel Exceedances (Mid-Ebb Tide)

Table 4.11 presents a summary of the nickel compliance status at IM stations during mid-ebb tide for the reporting month.

Table 4.11: Summary of Nickel Compliance Status at IM Stations (Mid-Ebb Tide)

Date

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

03/01/2017

05/01/2017

 

07/01/2017

10/01/2017

12/01/2017

14/01/2017

 

 

 

17/01/2017

19/01/2017

21/01/2017

24/01/2017

26/01/2017

28/01/2017

31/01/2017

No. of  nickel Exceedances

0

0

0

0

1

0

0

0

0

0

0

0

Note: Detailed results are presented in Appendix D.

Legend:

 

No exceedance of Action Level and Limit Level

 

Exceedance of Action Level recorded at monitoring station located downstream of the 3RS Project based on dominant tidal flow

 

Exceedance of Action Level recorded at monitoring station located upstream of the 3RS Project based on dominant tidal flow

 

Exceedance of Limit Level recorded at monitoring station located downstream of the 3RS Project based on dominant tidal flow

 

Exceedance of Limit Level recorded at monitoring station located upstream of the 3RS Project based on dominant tidal flow

 

Upstream station with respect to 3RS Project during the respective tide based on dominant tidal flow

 

 

 

 

 

 

 

As shown in Table 4.11, an exceedance of Limit Level was recorded at one IM station on one monitoring day. However, the exceedance occurred at a monitoring station which is located upstream of the 3RS Project during ebb tide. Such upstream station is unlikely to be affected by the Project. This singular nickel exceedance also appeared to be an isolated case with neither temporal nor spatial trend to indicate nickel release due to Project activities.

Based on these findings and given that exceedance was only recorded at a monitoring station located upstream of the Project, the exceedance was considered not due to the Project.

Findings for Nickel Exceedances (Mid-Flood Tide)

Table 4.12 presents a summary of the nickel compliance status at IM stations during mid-flood tide for the reporting month.

Table 4.12: Summary of Nickel Compliance Status at IM Stations (Mid-Flood Tide)

Date

IM1

IM2

IM3

IM4

IM5

IM6

IM7

IM8

IM9

IM10

IM11

IM12

03/01/2017

05/01/2017

 

07/01/2017

10/01/2017

12/01/2017

14/01/2017

 

 

 

17/01/2017

19/01/2017

21/01/2017

24/01/2017

26/01/2017

28/01/2017

31/01/2017

No. of  nickel Exceedances

0

0

0

0

0

0

0

1

0

0

0

0

Note: Detailed results are presented in Appendix D.

Legend:

 

No exceedance of Action Level and Limit Level

 

Exceedance of Action Level recorded at monitoring station located downstream of the 3RS Project based on dominant tidal flow

 

Exceedance of Action Level recorded at monitoring station located upstream of the 3RS Project based on dominant tidal flow

 

Upstream station with respect to 3RS Project during the respective tide based on dominant tidal flow

 

 

 

 

 

As shown in Table 4.12, an exceedance of Action Level was recorded at one IM station on one monitoring day.

As part of the investigation on the downstream exceedance event, details of the Project’s marine construction activities on the monitoring day were collected, as well as any observations during the monitoring. The findings are summarised in Table 4.13.

Table 4.13: Summary of Findings from Investigations of Nickel Exceedance during Mid-Flood Tide

Date

DCM works nearby

Approximate distance from DCM works*

Status of silt curtains (if applicable)

Construction vessels in the vicinity

Silt plume observed

Exceedance due to Project

07/01/2017

Yes

Around 1.5km

Deployed and maintained properly

No

No

No

Note: *This refers to the approximate distance between the DCM works and the nearest monitoring stations with exceedance

In addition to the investigation summary presented in Table 4.13, it is also noted from Table 4.12 that the singular exceedance at one downstream IM station appeared to be an isolated case with neither temporal nor spatial trend to indicate nickel release due to Project activities. Moreover, no exceedance was recorded at other downstream monitoring stations that were closer to the active DCM works, which further suggests the exceedance was not due to Project’s activities.

Based on these findings, the nickel exceedance at the downstream station during flood tide was considered not due to the Project.

Conclusions

Based on the findings of the exceedance investigations, it is concluded that the exceedances were not due to the Project. Hence no SR stations were adversely affected by the Project. All required actions under the Event and Action Plan has been followed. Exceedances appear to be due to natural fluctuation (such as naturally higher baseline SS levels at individual SR stations) or other sources not related to the Project.

Nevertheless, recognising that the IM stations represent a ‘first line of defense’, the non-project related exceedances identified at IM stations have been attended to as a precautionary measure. As part of the EM&A programme, the construction methods and mitigation measures for water quality will continue to be monitored and opportunities for further enhancement will continue to be explored and implemented where possible, to strive for better protection of water quality and the marine environment. 

In the meantime, the contractors were reminded to implement and maintain all mitigation measures during weekly site inspection and regular environmental management meetings. These include maintaining the silt curtain for sand blanket laying properly as recommended in the EM&A manual.

5        Waste Management

5.1         Monitoring Requirements

In accordance with the Updated EM&A Manual, the waste generated from construction activities was audited once per week to determine if wastes are being managed in accordance with the Waste Management Plan (WMP) prepared for the Project, contract-specific WMP, and any statutory and contractual requirements. All aspects of waste management including waste generation, storage, transportation and disposal were assessed during the audits. The Action and Limit levels of the construction waste are provided in Table 5.1.

Table 5.1: Action and Limit Levels for Construction Waste

Monitoring Stations

Action Level

Limit Level

Construction Area

When one valid documented complaint is

received

Non-compliance of the WMP, contract-specific

WMPs, any statutory and contractual

requirements

5.2         Waste Management Status

Weekly monitoring on all works contracts were carried out by the ET to check and monitor the implementation of proper waste management practices during the construction phase.

Recommendations including provision and maintenance of spill kits, provision of chemical waste storage area for chemical waste, and proper storage of construction material were provided during monitoring. In addition, the relevant contractors were reminded to provide recycling bins for the segregation of recyclables from general refuse. The contractors had taken actions to implement the recommended measures. 

Based on the Contractor’s information, about 195m3 of excavated materials were produced from the HDD launching site and Sheung Sha Chau under P560(R) in January 2017. The generated excavated materials were temporarily stored at storage and stockpiling area. The excavated material will be reused in the Project.

Around 16 tonnes of general refuse was disposed of to the WENT Landfill by advanced works contract and DCM contract in January 2017. Around 24m3 of Construction and Demolition (C&D) material generated from DCM contract was disposed of as public fill in the reporting month. No chemical waste was disposed off-site during the reporting month.

No exceedances of the Action or Limit Levels were recorded in the reporting period.

6        Chinese White Dolphin Monitoring

6.1         CWD Monitoring Requirements

In accordance with the Updated EM&A Manual, Chinese White Dolphin (CWD) monitoring by small vessel line-transect survey supplemented by land-based theodolite tracking should be conducted during construction phase.

The small vessel line-transect survey as proposed in the Updated EM&A Manual should be conducted at a frequency of two full survey per month while land-based theodolite tracking should be conducted at a frequency of one day per month per station during the construction phase. In addition to the land-based theodolite tracking required for impact monitoring as stipulated in the Updated EM&A Manual, supplemental theodolite tracking have also been conducted during the implementation for the SkyPier HSF diversion and speed control in order to assist in monitoring the effectiveness of these measures, i.e. in total twice per month at the Sha Chau station and three times per month at the Lung Kwu Chau station.

The Action Level (AL) and Limit Level (LL) for CWD monitoring were formulated by the action response approach using the running quarterly dolphin encounter rates STG and ANI derived from the baseline monitoring data, as presented in the CWD Baseline Monitoring Report. The derived values of AL and LL for CWD monitoring were summarized in Table 6.1.

Table 6.1: Derived Values of Action Level (AL) and Limit Level (LL) for Chinese White Dolphin Monitoring

 

NEL, NWL, AW, WL and SWL as a Whole

Action Level

Running quarterly* STG < 1.86 & ANI < 9.35

Limit Level

Two consecutive running quarterly^ (3-month) STG < 1.86 & ANI < 9.35

[Notes for Table 6.1 (referring to the baseline monitoring report):

*Action Level – running quarterly STG & ANI will be calculated from the three preceding survey months. For CWD monitoring for January 2017, data from 1 November 2016 to 31 January 2017 will be used to calculate the running quarterly encounter rates STG & ANI; 

^Limit Level – two consecutive running quarters mean both the running quarterly encounter rates of the preceding month December 2016 (calculated by data from October to December 2016) and the running quarterly encounter rates of this month (calculated by data from November 2016 to January 2017).

AL and/or LL will be exceeded if both STG and ANI fall below the criteria.]

6.2         CWD Monitoring Transects and Stations

6.2.1      Small Vessel Line-transect Survey

Small vessel line-transect surveys were conduct along the transects covering Northeast Lantau (NEL), Northwest Lantau (NWL), Airport West (AW), West Lantau (WL) and Southwest Lantau (SWL) areas as proposed in the Updated EM&A Manual, which are consistent with the Agriculture, Fisheries and Conservation Department (AFCD) long-term monitoring programme (except AW). The AW transect has not been previously surveyed in the AFCD programme due to the restrictions of HKIA Exclusion Zone, nevertheless, this transect was established during the EIA of the 3RS Project and refined in the Updated EM&A Manual with the aim to collect project specific baseline information within the HKIA Approach Area to fill the data gap that was not covered by the AFCD programme. This provided a larger sample size for estimating the densities and patterns of movements in the broader study area of the project.

For the NWL area, there was no significant demarcation of the 3RS works area by perimeter silt curtains during CWD monitoring survey in the reporting period and the transect lines within the works area could largely followed the waypoints conducted for baseline monitoring. Nevertheless, there was an increase in construction vessel traffic within the 3RS works areas in this month, incurring safety concern on the travelling routes of CWD vessel survey, therefore the transect lines for the NWL area will be revised in the next month to follow the waypoints set for construction phase monitoring. The planned vessel survey transect lines are depicted in Figure 6.1 with the waypoint coordinates of all transect lines given in Table 6.2, which are subject to on-site refinement based on the actual survey conditions and constraints.

Table 6.2: Coordinates of Transect Lines in NEL, NWL, AW, WL and SWL Survey Areas

Waypoint

Easting

Northing

Waypoint

Easting

Northing

NEL

1S

813525

820900

6N

818568

824433

1N

813525

824657

7S

819532

821420

2S

814556

818449

7N

819532

824209

2N

814559

824768

8S

820451

822125

3S

815542

818807

8N

820451

823671

3N

815542

824882

9S

821504

822371

4S

816506

819480

9N

821504

823761

4N

816506

824859

10S

822513

823268

5S

817537

820220

10N

822513

824321

5N

817537

824613

11S

823477

823402

6S

818568

820735

11N

823477

824613

NWL

1S

804671

814577

5N

808504

828602

1N

804671

831404

6S

809490

820590

2S

805475

815457

6N

809490

825352

2N

805476

830562

7S

810499

820950

3S

806464

819550

7N

810499

824613

3N

806464

829598

8S

811508

821250

4S

807518

819900

8N

811508

824254

4N

807518

829230

9S

812516

821250

5S

808504

820250

9N

812516

824254

AW

1W

804733

818205

2W

805045

816912

1E

806708

818017

2E

805960

816633

WL

1W

800600

805450

7W

800400

811450

1E

801760

805450

7E

802400

811450

2W

800300

806450

8W

800800

812450

2E

801750

806450

8E

802900

812450

3W

799600

807450

9W

801500

813550

3E

801500

807450

9E

803120

813550

4W

799400

808450

10W

801880

814500

4E

801430

808450

10E

803700

814500

5W

799500

809450

11W

802860

815500

5E

801300

809450

12S/11E

803750

815500

6W

799800

810450

12N

803750

818500

6E

801400

810450

 

 

 

SWL

1S

802494

803961

6S

807467

801137

1N

802494

806174

6N

807467

808458

2S

803489

803280

7S

808553

800329

2N

803489

806720

7N

808553

807377

3S

804484

802509

8S

809547

800338

3N

804484

807048

8N

809547

807396

4S

805478

802105

9S

810542

800423

4N

805478

807556

9N

810542

807462

5S

806473

801250

10S

811446

801335

5N

806473

808458

10N

811446

809436

6.2.2      Land-based Theodolite Tracking

Land-based theodolite tracking stations were set up at two locations, one facing east/south/west on the southern slopes of Sha Chau (SC), and the other facing north/northeast/northwest at Lung Kwu Chau (LKC). The stations (D and E) are depicted in Figure 6.2 and shown in Table 6.3 with position coordinates, height of station and approximate distance of consistent theodolite tracking capabilities for CWD.

Table 6.3: Land-based Survey Station Details

Stations

Location

Geographical Coordinates

Station Height (m)

Approximate Tracking Distance (km)

D

Sha Chau (SC)

22° 20’ 43.5” N

113° 53’ 24.66” E

45.66

2