Contract No. HY/2011/03

Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road

Section between Scenic Hill and Hong Kong Boundary Crossing Facilities

 

 

 

 

 

 

Monthly EM&A Report No.16 (January 2014)

 

17 February 2014

 

Revision 1

 

 

 

 

 

 

 

 

 

 

 

 

 

Main Contractor                                                                                                                     Designer

 

 


 

 


Contents

Executive Summary

1....... Introduction.. 1

1.1                          Basic Project Information. 1

1.2                          Project Organisation. 2

1.3                          Construction Programme. 2

1.4                          Construction Works Undertaken During the Reporting Month. 2

2....... Air Quality Monitoring.. 3

2.1                          Monitoring Requirements. 3

2.2                          Monitoring Equipment 4

2.3                          Monitoring Locations. 4

2.4                          Monitoring Parameters, Frequency and Duration. 4

2.5                          Monitoring Methodology. 4

2.6                          Monitoring Schedule for the Reporting Month. 6

2.7                          Monitoring Results. 7

3....... Noise Monitoring.. 8

3.1                          Monitoring Requirements. 8

3.2                          Monitoring Equipment 8

3.3                          Monitoring Locations. 8

3.4                          Monitoring Parameters, Frequency and Duration. 8

3.5                          Monitoring Methodology. 9

3.6                          Monitoring Schedule for the Reporting Month. 9

3.7                          Monitoring Results. 10

4....... Water Quality Monitoring.. 11

4.1                          Monitoring Requirements. 11

4.2                          Monitoring Equipment 12

4.3                          Monitoring Parameters, Frequency and Duration. 12

4.4                          Monitoring Locations. 12

4.5                          Monitoring Methodology. 13

4.6                          Monitoring Schedule for the Reporting Month. 14

4.7                          Monitoring Results. 14

5....... Dolphin Monitoring.. 17

5.1                          Monitoring Requirements. 17

5.2                          Monitoring Methodology. 17

5.3                          Monitoring Results. 19

5.4                          Reference. 21

6....... ENVIRONMENTAL SITE INSPECTION AND AUDIT.. 22

6.1                          Site Inspection. 22

6.2                          Advice on the Solid and Liquid Waste Management Status. 23

6.3                          Environmental Licenses and Permits. 23

6.4                          Implementation Status of Environmental Mitigation Measures. 23

6.5                          Summary of Exceedances of the Environmental Quality Performance Limit 24

6.6                          Summary of Complaints, Notification of Summons and Successful Prosecution. 24

7....... FUTURE KEY ISSUES.. 25

7.1                          Construction Programme for the Coming Months. 25

7.2                          Environmental Monitoring Scheme for the Coming Month. 25

8....... CONCLUSION.. 26

8.1                          Conclusions. 26

 

 

Figures

 

Figure 1.1        Location of the Site

Figure 2.1         Environmental Monitoring Stations

 

                           

Appendices

Appendix A       Environmental Management Structure

Appendix B       Construction Programme

Appendix C       Calibration Certificates

Appendix D       Monitoring Schedule

Appendix E       Monitoring Data and Graphical Plots

Appendix F       Event and Action Plan

Appendix G      Wind Data

Appendix H       Dolphin Monitoring Results

Appendix I         Waste Flow Table

Appendix J        Cumulative Statistics on Complaints

Appendix K       Environmental Licenses and Permits 

Appendix L       Implementation Schedule of Environmental Mitigation Measures 

Appendix M      Record of “Notification of Environmental Quality Limit Exceedances”

Appendix N       Location of Works Areas

 


Executive Summary

The Hong Kong-Zhuhai-Macao Bridge (HZMB) Hong Kong Link Road (HKLR) serves to connect the HZMB Main Bridge at the Hong Kong Special Administrative Region (HKSAR) Boundary and the HZMB Hong Kong Boundary Crossing Facilities (HKBCF) located at the north eastern waters of the Hong Kong International Airport (HKIA).

The HKLR project has been separated into two contracts. They are Contract No. HY/2011/03 Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road-Section between Scenic Hill and Hong Kong Boundary Crossing Facilities (hereafter referred to as the Contract) and Contract No. HY/2011/09 Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road-Section between HKSAR Boundary and Scenic Hill.

China State Construction Engineering (Hong Kong) Ltd. was awarded by Highways Department as the Contractor to undertake the construction works of Contract No. HY/2011/03.  The main works of the Contract include land tunnel at Scenic Hill, tunnel underneath Airport Road and Airport Express Line, reclamation and tunnel to the east coast of the Airport Island, at-grade road connecting to the HKBCF and highway works of the HKBCF within the Airport Island and in the vicinity of the HKLR reclamation.  The Contract is part of the HKLR Project and HKBCF Project, these projects are considered to be “Designated Projects”, under Schedule 2 of the Environmental Impact Assessment (EIA) Ordinance (Cap 499) and Environmental Impact Assessment (EIA) Reports (Register No. AEIAR-144/2009 and AEIAR-145/2009) were prepared for the Project.  The current Environmental Permit (EP) EP-352/2009/C for HKLR and EP-353/2009/G for HKBCF were issued on 5 September 2013 and 6 August 2013, respectively. These documents are available through the EIA Ordinance Register. The construction phase of Contract was commenced on 17 October 2012.

BMT Asia Pacific Limited has been appointed by the Contractor to implement the Environmental Monitoring & Audit (EM&A) programme for the Contract in accordance with the Updated EM&A Manual for HKLR (Version 1.0) and will be providing environmental team services to the Contract.

This is the sixteenth Monthly EM&A report for the Contract which summaries the monitoring results and audit findings of the EM&A programme during the reporting period from 1 January to 31 January 2014.

Environmental Monitoring and Audit Progress

The monthly EM&A programme was undertaken in accordance with the Updated EM&A Manual for HKLR (Version 1.0).  A summary of the monitoring activities in this reporting month is listed below:

1-hr TSP Monitoring

3, 9, 15, 21, 27 and 30 January 2014

24-hr TSP Monitoring at AMS 5

2, 9, 14, 20 and 29 January 2014

24-hr TSP Monitoring at AMS 6

2, 8, 14, 20, 24 and 29 January 2014

Noise Monitoring

9, 15, 21 and 30 January 2014

Water Quality Monitoring

1, 3, 6, 8, 10, 13, 15, 17, 20, 22, 24, 27 and 29 January 2014

Chinese White Dolphin Monitoring

7, 9, 21 and 23 January 2014

Site Inspection

8, 15, 22 and 28 January 2014

Due to interruption of electricity supply to high volume sampler at AMS5 during the sampling period, the 24hr- dust monitoring result on 8 January 2014 was considered invalid. 24 hrs dust monitoring was rescheduled on 9 January 2014.

Due to malfunction of high volume sampler at AMS5 on 24 January 2014, the 24 hrs dust monitoring was cancelled on 24 January 2014. After repairing the HVS, it resumed normal on 29 January 2014.

Due to unfavourable weather on 6 January 2014, the dolphin survey was rescheduled from 6 and 8 January 2014 to 7 and 9 January 2014.

Due to the boat arrangement problem, the dolphin monitoring was rescheduled from 20 January 2014 on 21 January 2014.

Due to Chinese New Year, the water quality monitoring on 31 January 2014 was rescheduled to 1 February 2014.

Breaches of Action and Limit Levels

A summary of environmental exceedances for this reporting month is as follows:

Environmental Monitoring

Parameters

Action Level (AL)

Limit Level (LL)

Air Quality

1-hr TSP

0

0

24-hr TSP

2

0

Noise

Leq (30 min)

0

0

Water Quality

Suspended solids level (SS)

4

0

Turbidity level

0

0

Dissolved oxygen level (DO)

0

0

 

Four Action Level exceedances of suspended solid level were recorded on 3, 6 and 10 January 2014. According to the information provided by the Contractor, marine construction activities were carried out within silt curtain as recommended in the EIA Report. There were no specific activities recorded during the monitoring period that would cause any significant impacts on monitoring results. Therefore, all exceedances were considered as non-contract related.

Two Action Level exceedances of 24-hr TSP were recorded at station AMS6 on 8 and 20 January 2014. The general weather conditions at Tung Chung were foggy and haze during the dust sampling period on 8 and 20 January 2014.  The Air Quality Health Index (AQHI) recorded by EPD at the Tung Chung station during the sampling time ranged from 3 (low) to 9 (very high) on 8 January 2014 and ranged from 5 (moderate) to 10 (very high) on 20 January 2014.  Therefore, it was considered that the exceedances were not related to the construction activities of the Contract and were caused by poor weather condition.

Complaint Log

A summary of environmental complaints for this reporting month is as follows:

Environmental Complaint No.

Date of Complaint Received

Description of Environmental Complaints

COM-2014-046

16 January 2014

Air Quality

COM-2014-048

18 January 2014

Other - Blackish mud

Notifications of Summons and Prosecutions

There were no notifications of summons or prosecutions received during this reporting month.

Reporting Changes

This report has been developed in compliance with the reporting requirements for the subsequent EM&A reports as required by the Updated EM&A Manual for HKLR (Version 1.0). 

The proposal for the change of Action Level and Limit Level for suspended solid and turbidity was approved by EPD on 25 March 2013.

The revised Event and Action Plan for dolphin Monitoring approved by EPD on 6 May 2013.

The original monitoring station at IS(Mf)9 (Coordinate- East:813273, North 818850) was observed inside the perimeter silt curtain on 1 July 2013, as such the original impact water quality monitoring location at IS(Mf)9 was temporarily shifted outside the silt curtain. The new co-ordinates of station IS(Mf)9 are 813226E and 818708N since 1 July 2013.


 

Future Key Issues

The future key issues include potential noise, air quality, water quality and ecological impacts and waste management arising from the following construction activities to be undertaken in the upcoming month:

·            Dismantling/trimming of Temporary 40mm Stone Platform for Construction of Seawall at
Portion X;

·             Stone Column Installation at Portion X;

·             Filling Works behind Stone Platform at Portion X;

·             Band Drains Installation at Portion X;

·             Temporary Stone Platform Construction at Portion X;

·             Temporary diversion of existing box culvert at Portion X;

·             Piling works at Portion X;

·             Works for Diversion of Airport Road and Kwo Lo Wan Road at Kwo Lo Wan / Airport Road;

·             Pre-grouting and Pipe Piling Works for AEL Access Shafts at Airport Express Line;

·             Utilities Detection at Kwo Lo Wan / Airport Road / Airport Express Line;

·             Establishment of Site Access at Kwo Lo Wan / Airport Road / Airport Express Line;

·             Access Shaft Construction for Tunnel at Portion Y;

·             Utility Culvert Excavation at Portion Y;

·             Pipe Piling works for Depressed Roundabout at Portion Y;

·             Tree Transplanting at East Coast Road;

·             Slope Protection / Stabilization (Soil Nailing Works) at West Portal;

·             Pipe Roofing Installation and Excavation for Tunnel SHT at West Portal;

·             Transformer room construction at West Portal;

·             Installation of blast door at West Portal; and

·             Mechanical breaking for 1st 50m of SHT tunnel at West Portal.

 


1        Introduction

1.1                 Basic Project Information

1.1.1       The Hong Kong-Zhuhai-Macao Bridge (HZMB) Hong Kong Link Road (HKLR) serves to connect the HZMB Main Bridge at the Hong Kong Special Administrative Region (HKSAR) Boundary and the HZMB Hong Kong Boundary Crossing Facilities (HKBCF) located at the north eastern waters of the Hong Kong International Airport (HKIA).

1.1.2       The HKLR project has been separated into two contracts.  They are Contract No. HY/2011/03 Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road-Section between Scenic Hill and Hong Kong Boundary Crossing Facilities (hereafter referred to as the Contract) and Contract No. HY/2011/09 Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road-Section between HKSAR Boundary and Scenic Hill.

1.1.3       China State Construction Engineering (Hong Kong) Ltd. was awarded by Highways Department (HyD) as the Contractor to undertake the construction works of Contract No. HY/2011/03.  The Contract is part of the HKLR Project and HKBCF Project, these projects are considered to be “Designated Projects”, under Schedule 2 of the Environmental Impact Assessment (EIA) Ordinance (Cap 499) and Environmental Impact Assessment (EIA) Reports (Register No. AEIAR-144/2009 and AEIAR-145/2009) were prepared for the Project.  The current Environmental Permit (EP) EP-352/2009/C for HKLR and EP-353/2009/G for HKBCF were issued on 5 September 2013 and 6 August 2013, respectively. These documents are available through the EIA Ordinance Register. The construction phase of Contract was commenced on 17 October 2012.  Figure 1.1 shows the project site boundary. The works areas are shown in Appendix N.

1.1.4       The Contract includes the following key aspects:

·                     New reclamation along the east coast of the approximately 23 hectares.

·                     Tunnel of Scenic Hill (Tunnel SHT) from Scenic Hill to the new reclamation, of approximately 1km in length with three (3) lanes for the east bound carriageway heading to the HKBCF and four (4) lanes for the westbound carriageway heading to the HZMB Main Bridge.

·                     An abutment of the viaduct portion of the HKLR at the west portal of Tunnel SHT and associated road works at the west portal of Tunnel SHT.

·                     An at grade road on the new reclamation along the east coast of the HKIA to connect with the HKBCF, of approximately 1.6 km along dual 3-lane carriageway with hard shoulder for each bound.

·                     Road links between the HKBCF and the HKIA including new roads and the modification of existing roads at the HKIA, involving viaducts, at grade roads and a Tunnel HAT.

·                     A highway operation and maintenance area (HMA) located on the new reclamation, south of the Dragonair Headquarters Building, including the construction of buildings, connection roads and other associated facilities.

·                     Associated civil, structural, building, geotechnical, marine, environmental protection, landscaping, drainage and sewerage, tunnel and highway electrical and mechanical works, together with the installation of street lightings, traffic aids and sign gantries, water mains and fire hydrants, provision of facilities for installation of traffic control and surveillance system (TCSS), reprovisioning works of affected existing facilities, implementation of transplanting, compensatory planting and protection of existing trees, and implementation of an environmental monitoring and audit (EM&A) program.

1.1.5       This is the sixteenth Monthly Environmental Monitoring and Audit (EM&A) report for the Contract which summaries the monitoring results and audit findings of the EM&A programme during the reporting period from 1 to 31 January 2014.

1.1.6       BMT Asia Pacific Limited has been appointed by the Contractor to implement the EM&A programme for the Contract in accordance with the Updated EM&A Manual for HKLR (Version 1.0) for HKLR and will be providing environmental team services to the Contract.  ENVIRON Hong Kong Ltd. was employed by HyD as the Independent Environmental Checker (IEC) and Environmental Project Office (ENPO) for the Project.  The project organization with regard to the environmental works is as follows.

1.2                Project Organisation

1.2.1       The project organization structure and lines of communication with respect to the on-site environmental management structure is shown in Appendix A.  The key personnel contact names and numbers are summarized in Table 1.1. 

Table 1.1          Contact Information of Key Personnel

Party

Position

Name

Telephone

Fax

Supervising Officer’s Representative
(Ove Arup & Partners
Hong Kong Limited)

(Chief Resident Engineer, CRE)

Robert Antony Evans

3968 0801

2109 1882

Environmental Project Office / Independent Environmental Checker
(Environ Hong Kong Limited)

Environmental Project Office Leader

Y. H. Hui

3465 2888

3465 2899

Independent Environmental Checker

Antony Wong

3465 2888

3465 2899

Contractor
(China State Construction Engineering (Hong Kong) Ltd)

Project Manager

S. Y. Tse

3968 7002

2109 2588

Environmental Officer

Federick Wong

3968 7117

2109 2588

Environmental Team
(BMT Asia Pacific)

Environmental Team Leader

Claudine Lee

2241 9847

2815 3377

24 hours complaint hotline

---

---

5699 5730

---

1.3                Construction Programme

1.3.1       A copy of the Contractor’s construction programme is provided in Appendix B. 

1.4                Construction Works Undertaken During the Reporting Month

1.4.1       A summary of the construction activities undertaken during this reporting month is shown in Table 1.2.


 

Table 1.2          Construction Activities During Reporting Month

Description of Activities

Site Area

Dismantling/trimming of temporary 40mm stone platform for construction of seawall

Portion X

Stone column installation

Portion X

Filling works behind stone platform

Portion X

Temporary stone platform construction

Portion X

Band drains Installation

Portion X

Piling works

Portion X

Slope protection/ stabilization (soil nailing works)

West Portal

Pipe Roofing Installation and Excavation for Tunnel SHT

West Portal

Works for diversion of Airport Road and Kwo Lo Wan Road

Kwo Lo Wan / Airport Road

Pre-grouting and pipe piling works for AEL access shafts

Airport Express Line

Utilities detection

Kwo Lo Wan/ Airport Road/ Airport Express Line

Establishment of site access

Kwo Lo Wan/ Airport Road/ Airport Express Line

Works for east access shaft

Kwo Lo Wan/ Airport Road/ Airport Express Line

Access shaft construction for SHT & HAT

Portion Y

Utility culvert excavation

Portion Y

Pipe piling works for Depressed Roundabout

Portion Y

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2        Air Quality Monitoring

2.1                Monitoring Requirements

2.1.1       In accordance with the Contract Specific EM&A Manual, baseline 1-hour and 24-hour TSP levels at two air quality monitoring stations were established.  Impact 1-hour TSP monitoring was conducted for at least three times every 6 days, while impact 24-hour TSP monitoring was carried out for at least once every 6 days. The Action and Limit Level for 1-hr TSP and 24-hr TSP are provided in Table 2.1 and Table 2.2, respectively.

Table 2.1          Action and Limit Levels for 1-hour TSP

Monitoring Station

Action Level, µg/m3

Limit Level, µg/m3

AMS 5 – Ma Wan Chung Village (Tung Chung)

352

500

AMS 6 – Dragonair / CNAC (Group) Building (HKIA)

360

 

Table 2.2         Action and Limit Levels for 24-hour TSP

Monitoring Station

Action Level, µg/m3

Limit Level, µg/m3

AMS 5 – Ma Wan Chung Village (Tung Chung)

164

260

AMS 6 – Dragonair / CNAC (Group) Building (HKIA)

173

260

 

2.2                Monitoring Equipment

2.2.1       24-hour TSP air quality monitoring was performed using High Volume Sampler (HVS) located at each designated monitoring station. The HVS meets all the requirements of the Contract Specific EM&A Manual. Portable direct reading dust meters were used to carry out the 1-hour TSP monitoring.  Brand and model of the equipment is given in Table 2.3.

Table 2.3          Air Quality Monitoring Equipment

Equipment

Brand and Model

Portable direct reading dust meter (1-hour TSP)

Sibata Digital Dust Monitor (Model No. LD-3B)

High Volume Sampler
(24-hour TSP)

Tisch Environmental Mass Flow Controlled Total Suspended Particulate (TSP) High Volume Air Sampler (Model No. TE-5170)

2.3                Monitoring Locations

2.3.1       Monitoring locations AMS5 and AMS6 were set up at the proposed locations in accordance with Contract Specific EM&A Manual.

2.3.2       Figure 2.1 shows the locations of monitoring stations. Table 2.4 describes the details of the monitoring stations.

Table 2.4          Locations of Impact Air Quality Monitoring Stations

Monitoring Station

Location

AMS5

Ma Wan Chung Village (Tung Chung)

AMS6

Dragonair / CNAC (Group) Building (HKIA)

2.4                Monitoring Parameters, Frequency and Duration

2.4.1       Table 2.5 summarizes the monitoring parameters, frequency and duration of impact TSP monitoring.

Table 2.5          Air Quality Monitoring Parameters, Frequency and Duration

Parameter

Frequency and Duration

1-hour TSP

Three times every 6 days while the highest dust impact was expected

24-hour TSP

Once every 6 days

 

2.5                Monitoring Methodology

2.5.1       24-hour TSP Monitoring

(a)           The HVS was installed in the vicinity of the air sensitive receivers. The following criteria were considered in the installation of the HVS.

(i)         A horizontal platform with appropriate support to secure the sampler against gusty wind was provided.

(ii)         The distance between the HVS and any obstacles, such as buildings, was at least twice the height that the obstacle protrudes above the HVS.

(iii)        A minimum of 2 meters separation from walls, parapets and penthouse for rooftop sampler.

(iv)        No furnace or incinerator flues nearby.

(v)        Airflow around the sampler was unrestricted.

(vi)        Permission was obtained to set up the samplers and access to the monitoring stations.

(vii)       A secured supply of electricity was obtained to operate the samplers.

(viii)      The sampler was located more than 20 meters from any dripline.

(ix)        Any wire fence and gate, required to protect the sampler, did not obstruct the monitoring process.

(x)        Flow control accuracy was kept within ±2.5% deviation over 24-hour sampling period.

(b)          Preparation of Filter Papers

(i)         Glass fibre filters, G810 were labelled and sufficient filters that were clean and without pinholes were selected.

(ii)        All filters were equilibrated in the conditioning environment for 24 hours before weighing. The conditioning environment temperature was around 25 °C and not variable by more than ±3 °C; the relative humidity (RH) was < 50% and not variable by more than ±5%.  A convenient working RH was 40%.

(iii)       All filter papers were prepared and analysed by ALS Technichem (HK) Pty Ltd., which is a HOKLAS accredited laboratory and has comprehensive quality assurance and quality control programmes.

(c)          Field Monitoring

(i)         The power supply was checked to ensure the HVS works properly.

(ii)         The filter holder and the area surrounding the filter were cleaned.

(iii)        The filter holder was removed by loosening the four bolts and a new filter, with stamped number upward, on a supporting screen was aligned carefully.

(iv)        The filter was properly aligned on the screen so that the gasket formed an airtight seal on the outer edges of the filter.

(v)        The swing bolts were fastened to hold the filter holder down to the frame.  The pressure applied was sufficient to avoid air leakage at the edges.

(vi)        Then the shelter lid was closed and was secured with the aluminium strip.

(vii)       The HVS was warmed-up for about 5 minutes to establish run-temperature conditions.

(viii)      A new flow rate record sheet was set into the flow recorder.

(ix)       On site temperature and atmospheric pressure readings were taken and the flow rate of the HVS was checked and adjusted at around 1.1 m3/min, and complied with the range specified in the Updated EM&A Manual for HKLR (Version 1.0) (i.e. 0.6-1.7 m3/min).

(x)        The programmable digital timer was set for a sampling period of 24 hours, and the starting time, weather condition and the filter number were recorded.

(xi)        The initial elapsed time was recorded.

(xii)       At the end of sampling, on site temperature and atmospheric pressure readings were taken and the final flow rate of the HVS was checked and recorded.

(xiii)      The final elapsed time was recorded.

(xiv)     The sampled filter was removed carefully and folded in half length so that only surfaces with collected particulate matter were in contact.

(xv)      It was then placed in a clean plastic envelope and sealed.

(xvi)      All monitoring information was recorded on a standard data sheet.

(xvii)     Filters were then sent to ALS Technichem (HK) Pty Ltd. for analysis.

(d)          Maintenance and Calibration

(i)         The HVS and its accessories were maintained in good working condition, such as replacing motor brushes routinely and checking electrical wiring to ensure a continuous power supply.

(ii)         5-point calibration of the HVS was conducted using TE-5025A Calibration Kit prior to the commencement of baseline monitoring. Bi-monthly 5-point calibration of the HVS will be carried out during impact monitoring.

(iii)        Calibration certificate of the HVSs are provided in Appendix C.

2.5.2       1-hour TSP Monitoring

(a)           Measuring Procedures

The measuring procedures of the 1-hour dust meter were in accordance with the Manufacturer’s Instruction Manual as follows:-

(i)         Turn the power on.

(ii)        Close the air collecting opening cover.

(iii)       Push the “TIME SETTING” switch to [BG].

(iv)       Push “START/STOP” switch to perform background measurement for 6 seconds.

(v)        Turn the knob at SENSI ADJ position to insert the light scattering plate.

(vi)       Leave the equipment for 1 minute upon “SPAN CHECK” is indicated in the display.

(vii)      Push “START/STOP” switch to perform automatic sensitivity adjustment. This measurement takes 1 minute.

(viii)      Pull out the knob and return it to MEASURE position.

(ix)       Push the “TIME SETTING” switch the time set in the display to 3 hours.

(x)        Lower down the air collection opening cover.

(xi)       Push “START/STOP” switch to start measurement.

(b)           Maintenance and Calibration

(i)         The 1-hour TSP meter was calibrated at 1-year intervals against a Tisch Environmental Mass Flow Controlled Total Suspended Particulate (TSP) High Volume Air Sampler. Calibration certificates of the Laser Dust Monitors are provided in Appendix C.

2.6                Monitoring Schedule for the Reporting Month

The schedule for air quality monitoring in January 2014 is provided in Appendix D. Due to interruption of electricity supply to high volume sampler (HVS) at AMS5 during the sampling period, the 24hr- dust monitoring result on 8 January 2014 was considered invalid. 24 hrs dust monitoring was rescheduled on 9 January 2014. Due to malfunction of high volume sampler on 24 January 2014, the 24 hrs dust monitoring was cancelled on 24 January 2014. After repairing the HVS, it resumed normal on 29 January 2014.

2.7                Monitoring Results

2.7.1       The monitoring results for 1-hour TSP and 24-hour TSP are summarized in Tables 2.6 and 2.7 respectively. Detailed impact air quality monitoring results and relevant graphical plots are presented in Appendix E.

Table 2.6         Summary of 1-hour TSP Monitoring Results During the Reporting Month

Monitoring Station

Average (mg/m3)

Range (mg/m3)

Action Level (mg/m3)

Limit Level (mg/m3)

AMS5

73

18154

352

500

AMS6

93

53 – 284

360

500

 

 

 

 

 

 

 

 

Table 2.7         Summary of 24-hour TSP Monitoring Results During the Reporting Month

Monitoring Station

Average (mg/m3)

Range (mg/m3)

Action Level  (mg/m3)

Limit Level (mg/m3)

AMS5

93

42 161

164

260

AMS6

142

86 – 213

173

260

 

2.7.2       Two Action Level exceedances of 24-hr TSP were recorded at station AMS6 on 8 and 20 January 2014.. The general weather conditions at Tung Chung were foggy and haze during the dust sampling period on 8 and 20 January 2014. The Air Quality Health Index (AQHI) recorded by EPD at the Tung Chung station during the sampling time ranged from 3 (low) to 9 (very high) on 8 January 2014 and ranged from 5 (moderate) to 10 (very high) on 20 January 2014. Therefore, it was considered that the exceedances were not related to the construction activities of the Contract and were caused by poor weather. The event action plan is annexed in Appendix F.

2.7.3       There were technical problems of the on-site weather station from 17 January 2014 to 18 January 2014 and 27 January 2014 to 28 January 2014. As the wind data could not be monitored, the wind data for this period were reference to the wind data of Hong Kong Observatory’s Chek Lap Kok weather station. The wind data obtained from the on-site weather station during the reporting month is shown in Appendix G.


 

3        Noise Monitoring

3.1               Monitoring Requirements

3.1.1       In accordance with the Contract Specific EM&A Manual, impact noise monitoring was conducted for at least once per week during the construction phase of the Project. The Action and Limit level of the noise monitoring is provided in Table 3.1.

Table 3.1          Action and Limit Levels for Noise during Construction Period

Monitoring Station

Time Period

Action Level

Limit Level

NMS5 - Ma Wan Chung Village (Ma Wan Chung Resident Association) (Tung Chung)

0700-1900 hours on normal weekdays

When one documented complaint is received

75 dB(A)

3.2                Monitoring Equipment

3.2.1       Noise monitoring was performed using sound level meters at each designated monitoring station.  The sound level meters deployed comply with the International Electrotechnical Commission Publications (IEC) 651:1979 (Type 1) and 804:1985 (Type 1) specifications.  Acoustic calibrator was deployed to check the sound level meters at a known sound pressure level.  Brand and model of the equipment are given in Table 3.2.

Table 3.2         Noise Monitoring Equipment

Equipment

Brand and Model

Integrated Sound Level Meter

B&K 2238

Acoustic Calibrator

B&K 4231

3.3                Monitoring Locations

3.3.1       Monitoring location NMS5 was set up at the proposed locations in accordance with Contract Specific EM&A Manual.

3.3.2       Figure 2.1 shows the locations of monitoring stations. Table 3.3 describes the details of the monitoring stations.

Table 3.3          Locations of Impact Noise Monitoring Stations

Monitoring Station

Location

NMS5

Ma Wan Chung Village (Ma Wan Chung Resident Association) (Tung Chung)

3.4                Monitoring Parameters, Frequency and Duration

3.4.1       Table 3.4 summarizes the monitoring parameters, frequency and duration of impact noise monitoring.


 

Table 3.4         Noise Monitoring Parameters, Frequency and Duration

Parameter

Frequency and Duration

30-mins measurement at each monitoring station between 0700 and 1900 on normal weekdays (Monday to Saturday). Leq, L10 and L90 would be recorded.

At least once per week

 

3.5                Monitoring Methodology

3.5.1       Monitoring Procedure

(a)        The sound level meter was set on a tripod at a height of 1.2 m above the podium for free-field measurements at NMS5. A correction of +3 dB(A) shall be made to the free field measurements.

(b)        The battery condition was checked to ensure the correct functioning of the meter.

(c)        Parameters such as frequency weighting, the time weighting and the measurement time were set as follows:-

(i)            frequency weighting: A

(ii)           time weighting: Fast

(iii)          time measurement: Leq(30-minutes) during non-restricted hours i.e. 07:00 – 1900 on normal weekdays;

(e)        Prior to and after each noise measurement, the meter was calibrated using the acoustic calibrator for 94.0 dB(A) at 1000 Hz.  If the difference in the calibration level before and after measurement was more than 1.0 dB(A), the measurement would be considered invalid and repeat of noise measurement would be required after re-calibration or repair of the equipment.

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

(g)        Noise measurement was paused during periods of high intrusive noise (e.g. dog barking, helicopter noise) if possible. Observations were recorded when intrusive noise was unavoidable.

(h)        Noise monitoring was cancelled in the presence of fog, rain, wind with a steady speed exceeding 5m/s, or wind with gusts exceeding 10m/s. The wind speed shall be checked with a portable wind speed meter capable of measuring the wind speed in m/s.

3.5.2       Maintenance and Calibration

(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 HOKLAS laboratory to check and calibrate at yearly intervals.

(c)        Calibration certificates of the sound level meters and acoustic calibrators are provided in Appendix C.

3.6                Monitoring Schedule for the Reporting Month

3.6.1       The schedule for construction noise monitoring in January 2014 is provided in Appendix D.


 

3.7                Monitoring Results

3.7.1       The monitoring results for construction noise are summarized in Table 3.5 and the monitoring results and relevant graphical plots are provided in Appendix E.

Table 3.5          Summary of Construction Noise Monitoring Results During the Reporting Month

Monitoring Station

Average Leq (30 mins), dB(A)

Range of Leq (30 mins), dB(A)

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

NMS5

59

5961

75

*A correction of +3dB(A) facade correction was included. 

3.7.2       There were no Action and Limit Level exceedances for noise during daytime on normal weekdays of the reporting month.

3.7.3       Major noise sources during the noise monitoring included construction activities of the Contract and nearby traffic noise.

3.7.4       The event action plan is annexed in Appendix F.

 


4        Water Quality Monitoring

4.1               Monitoring Requirements

4.1.1       Impact water quality monitoring was carried out to ensure that any deterioration of water quality was detected, and that timely action was taken to rectify the situation.  For impact water quality monitoring, measurements were taken in accordance with the Contract Specific EM&A Manual. Table 4.1 shows the established Action/Limit Levels for the environmental monitoring works.  The ET proposed to amend the Acton Level and Limit Level for turbidity and suspended solid and EPD approved ET’s proposal on 25 March 2013.  Therefore, Action Level and Limit Level for the Contract have been changed since 25 March 2013.

4.1.2       The original and revised Action Level and Limit Level for turbidity and suspended solid are shown in Table 4.1.

Table 4.1          Action and Limit Levels for Water Quality

Parameter (unit)

Water Depth

Action Level

Limit Level

Dissolved Oxygen (mg/L) (surface, middle and bottom)

Surface and Middle

5.0

4.2 except 5 for Fish Culture Zone

Bottom

4.7

3.6

Turbidity (NTU)

Depth average

27.5 or 120% of upstream control station’s turbidity at the same tide of the same day;

The action level has been amended to “27.5 and 120% of upstream control station’s turbidity at the same tide of the same day” since 25 March 2013.

47.0 or 130% of turbidity at the upstream control station at the same tide of same day;

The limit level has been amended to “47.0 and 130% of turbidity at the upstream control station at the same tide of same day” since 25 March 2013.

Suspended Solid (SS) (mg/L)

Depth average

23.5 or 120% of upstream control station’s SS at the same tide of the same day;

The action level has been amended to “23.5 and 120% of upstream control station’s SS at the same tide of the same day” since 25 March 2013.

34.4 or 130% of SS at the upstream control station at the same tide of same day and 10mg/L for Water Services Department Seawater Intakes;

The limit level has been amended to “34.4 and 130% of SS at the upstream control station at the same tide of same day and 10mg/L for Water Services Department Seawater Intakes” since 25 March 2013

Notes:

               (1)    Depth-averaged is calculated by taking the arithmetic means of reading of all three depths.

               (2)    For DO, non-compliance of the water quality limit occurs when monitoring result is lower that the limit.

               (3)    For SS & turbidity non-compliance of the water quality limits occur when monitoring result is higher than the limits.

               (4)    The change to the Action and limit Levels for Water Quality Monitoring for the EM&A works was approved by EPD on 25 March 2013.

4.2               Monitoring Equipment

4.2.1       Table 4.2 summarises the equipment used in the impact water quality monitoring programme.

Table 4.2          Water Quality Monitoring Equipment

Equipment      

Brand and Model

DO and Temperature Meter, Salinity Meter, Turbidimeter and pH Meter

YSI Model 6820 V2-M, 650

Positioning Equipment

DGPS – KODEN : KGP913MkII, KBG3

Water Depth Detector

Layin Associates: SM-5 & SM5A

Water Sampler

Wildlife Supply Company : 5487-10

4.3               Monitoring Parameters, Frequency and Duration

4.3.1       Table 4.3 summarises the monitoring parameters, frequency and monitoring depths of impact water quality monitoring as required in the Contract Specific EM&A Manual.

Table 4.3          Impact Water Quality Monitoring Parameters and Frequency

Monitoring Stations

Parameter, unit

Frequency

No. of depth

Impact Stations:
IS5, IS(Mf)6, IS
7, IS8, IS(Mf)9 & IS10,

 

Control/Far Field Stations:
CS
2 & CS(Mf)5,

 

Sensitive Receiver Stations:
SR3, SR4, SR
5, SR10A & SR10B

·    Depth, m

·    Temperature, oC

·    Salinity, ppt

·    Dissolved Oxygen (DO), mg/L

·    DO Saturation, %

·    Turbidity, NTU

·    pH

·   Suspended Solids (SS), mg/L

Three times per week during mid-ebb and mid-flood tides (within ± 1.75 hour of the predicted time)

3

(1 m below water surface, mid-depth and 1 m above sea bed, except where the water depth is less than 6 m, in which case the mid-depth station may be omitted.  Should the water depth be less than 3 m, only the mid-depth station will be monitored).

 

4.4               Monitoring Locations

4.4.1       In accordance with the Contract Specific EM&A Manual, thirteen stations (6 Impact Stations, 5 Sensitive Receiver Stations and 2 Control Stations) were designated for impact water quality monitoring.  The six Impact Stations (IS) were chosen on the basis of their proximity to the reclamation and thus the greatest potential for water quality impacts, the five Sensitive Receiver Stations (SR) were chosen as they are close to the key sensitive receives and the two Control Stations (CS) were chosen to facilitate comparison of the water quality of the IS stations with less influence by the Project/ ambient water quality conditions.

4.4.2       The locations of these monitoring stations are summarized in Table 4.4 and shown in
Figure 2.1.

Table 4.4         Impact Water Quality Monitoring Stations

Monitoring Stations

Description

Coordinates

Easting

Northing

IS5

Impact Station (Close to HKLR construction site)

811579

817106

IS(Mf)6

Impact Station (Close to HKLR construction site)

812101

817873

IS7

Impact Station (Close to HKBCF construction site)

812244

818777

IS8

Impact Station (Close to HKBCF construction site)

814251

818412

IS(Mf)9

Impact Station (Close to HKBCF construction site)

813273

818850

IS(Mf)9

Impact Station (Close to HKBCF construction site)

813226

818708

IS10

Impact Station (Close to HKBCF construction site)

812577

820670

SR3

Sensitive receivers (San Tau SSSI)

810525

816456

SR4

Sensitive receivers (Tai Ho Inlet)

814760

817867

SR5

Sensitive receivers (Artificial Reef In NE Airport)

811489

820455

SR10A

Sensitive receivers (Ma Wan Fish Culture Zone)

823741

823495

SR10B

Sensitive receivers (Ma Wan Fish Culture Zone)

823686

823213

CS2

Control Station (Mid-Ebb)

805849

818780

CS(Mf)5

Control Station (Mid-Flood)

817990

821129

Remark:

The original monitoring station at IS(Mf)9 (Coordinate- East:813273, North 818850) was observed inside the perimeter silt curtain on 1 July 2013, as such the original impact water quality monitoring location at IS(Mf)9 was temporarily shifted outside the silt curtain. The new co-ordinates of station IS(Mf)9 are 813226E and 818708N since 1 July 2013.

4.5                Monitoring Methodology

4.5.1       Instrumentation

(a)        The in-situ water quality parameters including dissolved oxygen, temperature, salinity and turbidity, pH were measured by multi-parameter meters.

4.5.2       Operating/Analytical Procedures

(a)        Digital Differential Global Positioning Systems (DGPS) were used to ensure that the correct location was selected prior to sample collection.

(b)        Portable, battery-operated echo sounders were used for the determination of water depth at each designated monitoring station.

(c)        All in-situ measurements were taken at 3 water depths, 1 m below water surface, mid-depth and 1 m above sea bed, except where the water depth was less than 6 m, in which case the mid-depth station was omitted. Should the water depth be less than 3 m, only the mid-depth station was monitored.

(d)        At each measurement/sampling depth, two consecutive in-situ monitoring (DO concentration and saturation, temperature, turbidity, pH, salinity) and water sample for SS. The probes were retrieved out of the water after the first measurement and then re-deployed for the second measurement. Where the difference in the value between the first and second readings of DO or turbidity parameters was more than 25% of the value of the first reading, the reading was discarded and further readings were taken.

(e)        Duplicate samples from each independent sampling event were collected for SS measurement. Water samples were collected using the water samplers and the samples were stored in high-density polythene bottles. Water samples collected were well-mixed in the water sampler prior to pre-rinsing and transferring to sample bottles. Sample bottles were pre-rinsed with the same water samples. The sample bottles were then be packed in cool-boxes (cooled at 4oC without being frozen), and delivered to ALS Technichem (HK) Pty Ltd. for the analysis of suspended solids concentrations. The laboratory determination work would be started within 24 hours after collection of the water samples. ALS Technichem (HK) Pty Ltd. is a HOKLAS accredited laboratory and has comprehensive quality assurance and quality control programmes.

(f)        The analysis method and detection limit for SS is shown in Table 4.5.

Table 4.5    Laboratory Analysis for Suspended Solids

Parameters

Instrumentation

Analytical Method

Detection Limit

Suspended Solid (SS)

Weighting

APHA 2540-D

0.5mg/L

 

(g)        Other relevant data were recorded, including monitoring location / position, time, water depth, tidal stages, weather conditions and any special phenomena or work underway at the construction site in the field log sheet for information.

4.5.3       Maintenance and Calibrations

(a)        All in situ monitoring instruments would be calibrated by ALS Technichem (HK) Pty Ltd. before use and at 3-monthly intervals throughout all stages of the water quality monitoring programme. The procedures of performance check of sonde and testing results are provided in Appendix C.

4.6                Monitoring Schedule for the Reporting Month

4.6.1       The schedule for impact water quality monitoring in January 2014 is provided in
Appendix D.

4.7                Monitoring Results

4.7.1       Impact water quality monitoring was conducted at all designated monitoring stations during the reporting month. Impact water quality monitoring results and relevant graphical plots are provided in Appendix E.

4.7.2       Exceedances were recorded for suspended solid level during the reporting month. Number of exceedances recorded during the reporting month at each impact station are summarised in Table 4.6.

Table 4.6          Summary of Water Quality Exceedances

Station

Exceedance Level

DO

(S&M)

DO

(Bottom)

Turbidity

SS

Total number of exceedances

Ebb

Flood

Ebb

Flood

Ebb

Flood

Ebb

Flood

Ebb

Flood

IS5

Action Level

--

--

--

--

--

--

--

10 Jan 2014

0

1

Limit Level

--

--

--

--

--

--

--

--

0

0

IS(Mf)6

Action Level

--

--

--

--

--

--

--

--

0

0

Limit Level

--

--

--

--

--

--

--

--

0

0

IS7

Action Level

--

--

--

--

--

--

--

--

0

0

Limit Level

--

--

--

--

--

--

--

--

0

0

IS8

Action Level

--

--

--

--

--

--

--

--

0

0

Limit Level

--

--

--

--

--

--

--

--

0

0

IS(Mf)9

Action Level

--

--

--

--

--

--

--

6 Jan 2014

0

1

Limit Level

--

--

--

--

--

--

--

--

0

0

IS10

Action Level

--

--

--

--

--

--

--

--

0

0

Limit Level

--

--

--

--

--

--

--

--

0

0

SR3

Action Level

--

--

--

--

--

--

--

3 Jan 2014

0

1

Limit Level

--

--

--

--

--

--

--

--

0

0

SR4

Action Level

--

--

--

--

--

--

--

--

0

0

Limit Level

--

--

--

--

--

--

--

--

0

0

SR5

Action Level

--

--

--

--

--

--

--

3 Jan 2014

0

1

Limit Level

--

--

--

--

--

--

--

--

0

0

SR10A

Action Level

--

--

--

--

--

--

--

--

0

0

Limit Level

--

--

--

--

--

--

--

--

0

0

SR10B

Action Level

--

--

--

--

--

--

--

--

0

0

Limit Level

--

--

--

--

--

--

--

--

0

0

Total

Action

0

0

0