Highway Logo2.jpg

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.5 (February 2013)

 

12 March 2013

 

Revision 1

 

 

 

 

 

 

 

 

 

 

 

 

 

Main Contractor                                                                                                                      Designer

Atkins new logo
 

 


 

 


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 3

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. 6

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 11

4.3                          Monitoring Parameters, Frequency and Duration. 11

4.4                          Monitoring Locations. 12

4.5                          Monitoring Methodology. 13

4.6                          Monitoring Schedule for the Reporting Month. 13

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. 20

6....... ENVIRONMENTAL SITE INSPECTION AND AUDIT.. 21

6.1                          Site Inspection. 21

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 23

6.6                          Summary of Complaints, Notification of Summons and Successful Prosecution. 23

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/A for HKLR and EP-353/2009/E for HKBCF were issued on 31 October 2011 and 16 October 2012, 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 fifth 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 February to 28 February 2013.

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                           6, 14, 20, and 26 February 2013

24-hr TSP Monitoring                 6, 14, 19, and 25 February 2013

Noise Monitoring                               6, 14, 20, and 26 February 2013

Water Quality Monitoring                   1, 4, 6, 8, 11, 13, 15, 18, 20, 22, 25 and 27 February 2013

Chinese White Dolphin Monitoring     1, 6, 18 and 20 February 2013

Site Inspection                                  5, 14, 19, and 26 February 2013

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

0

0

Noise

Leq (30 min)

0

0

Water Quality

Suspended solids level (SS)

20

100

Turbidity level

18

122

Dissolved oxygen level (DO)

0

0

 

During the reporting month, there are 20 Action Level exceedances and 100 Limit Level exceedances of suspended solids level. 18 Action Level exceedances and 122 Limit Level exceedances of turbidity level were recorded. No major marine works were carried out near the monitoring stations. Geotextile installation work, rock and sand fillings were being carried out within silt curtains near the restricted area during the sampling period.  These activities were unlikely to cause adverse water quality impact. No leakage of turbid water or any abnormity or malpractice was observed during the sampling exercise.  Therefore, all exceedances were considered as non-contract related.

There are no Action and Limit Level exceedances for noise during this reporting month.

There are no Action and Limit Level exceedances for 1-hr TSP and 24-TSP during this reporting month.

All investigation reports for exceedances of the Contract have been submitted to ENPO/IEC for comments and/or follow up to identify whether the exceedances occurred related to other HZMB contracts.

Complaint Log

There was no complaint received in relation to the environmental impact during the reporting period.

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).  There are no reporting changes. 

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:

¡P             Erection of Hoardings and Fencings at Site Boundaries Portion Y;

¡P             Site clearing for road and drainage work at Portion Y;

¡P             Removal of armour rocks of existing seawall at Portion X;

¡P             Sand filling behind stone platform at Portion X;

¡P             Formation of temporary stone platform at Portion X;

¡P             Installation of stone column at Portion X;

¡P             Reclamation at Portion X;

¡P             Amour rock bund installation for temporary barging point at Portion X;

¡P             Geotextile installation on sea bed at Portion X;

¡P             Works for diversion of Airport Road and Kwo Lo Wan Road;

¡P             Pre-grouting and pip pilling works for AEL access shafts at AEL;

¡P             Site formation work for tunneling at West portal;

¡P             Installation of soil nails at West Portal;

¡P             Tree felling/tree transplanting at West Portal;

¡P             Boulder removal/stabilization works at West Portal; and

¡P             Access Shaft Construction for SHT & HAT at Portion Y.

 


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/A for HKLR and EP-353/2009/E for HKBCF were issued on 31 October 2011 and 16 October 2012, 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 area are shown in Appendix N,

1.1.4       The Contract includes the following key aspects:

¡P                     New reclamation along the east coast of the approximately 23 hectares.

¡P                     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.

¡P                     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.

¡P                     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.

¡P                     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.

¡P                     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.

¡P                     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 fifth 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 February to 28 February 2013.

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.

1.2.1       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

3743 0788

3548 6988

Independent Environmental Checker

Antony Wong

3743 0788

3548 6988

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

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

Site Area

Description of Activities

Portion Y

Erection of Hoardings and Fencings at Site Boundaries

Portion X

Site clearing for road and drainage work

Portion X

Removal of armour rocks of existing seawall

Portion X

Installation of silt curtain and geotextile laying

Portion X

Formation of temporary stone platform

Portion X

Installation of stone column

Kwo Lo Wan Road

Reclamation

West Portal

Site formation work for tunnelling

Portion Y

Installation of Soil Nails

Portion Y

Access Shaft Construction for SHT & HAT

 

 

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 2 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 ¡V Ma Wan Chung Village (Tung Chung)

352

500

AMS 6 ¡V 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 ¡V Ma Wan Chung Village (Tung Chung)

164

260

AMS 6 ¡V 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)

 


 

2.3.1       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)

2.4.1       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

 

2.5.1       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 ¡Ó2.5% 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 ¢XC and not variable by more than ¡Ó3 ¢XC; the relative humidity (RH) was < 50% and not variable by more than ¡Ó5%.  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 aluminum 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 hrs, 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.

2.6.1       The schedule for air quality monitoring in February 2013 is provided in Appendix D.

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

56

31 ¡V 98

352

500

AMS6

58

27 ¡V 98

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

48

30 ¡V 64

164

260

AMS6

48

17 ¡V 70

173

260

 

2.7.2       No Action and Limit Levels exceedances were recorded at all monitoring stations during this reporting month.

2.7.3       The event action plan is annexed in Appendix F.

2.7.4       The wind data obtained from the on-site weather station during the reporting month is shown in Appendix G.


 

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 hrs 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)

3.4.1       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

 

3.5.1       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 ¡V 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.

3.6.1       The schedule for construction noise monitoring in February 2013 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

60

58 ¡V 63

75

*+3dB(A) Façade correction included

 

3.7.2       No Action and Limit Level exceedances were recorded at NMS5 during 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

4.1.1       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.

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

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

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

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

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.

4.2.1       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 6920 V2-M, 650

Positioning Equipment

DGPS ¡V KODEN : KGP913MkII, KBG3

Water Depth Detector

Layin Associates: SM-5 & SM5A

Water Sampler

Wildlife Supply Company : 5487-10

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

¡P    Depth, m

¡P    Temperature, oC

¡P    Salinity, ppt

¡P    Dissolved Oxygen (DO), mg/L

¡P    DO Saturation, %

¡P    Turbidity, NTU

¡P    pH

¡P   Suspended Solids (SS), mg/L

Three times per week during mid-ebb and mid-flood tides (within ¡Ó 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).

 

4.4.1       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

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

 

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.

4.6.1       The schedule for impact water quality monitoring in February 2013 is provided in Appendix D.

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 turbidity and suspended solids 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

--

--

--

--

2013-02-15

---

2013-02-22

2013-02-13

2

1

Limit Level

--

--

--

--

2013-02-01

2013-02-04

2013-02-06

2013-02-08

2013-02-11

2013-02-13

2013-02-01

2013-02-04

2013-02-06

2013-02-08

2013-02-11

2013-02-13

2013-02-18

--

2013-02-01

2013-02-04

2013-02-08

2013-02-18

2013-02-20

2013-02-22

2013-02-25

6

14

IS(Mf)6

Action Level

--

--

--

--

2013-02-13

2013-02-13

2013-02-20

--

2013-02-06

2013-02-18

1

4

Limit Level

--

--

--

--

2013-02-01

2013-02-04

2013-02-06

2013-02-08

2013-02-11

2013-02-15

2013-02-18

2013-02-22

2013-02-25

2013-02-27

2013-02-01

2013-02-04

2013-02-06

2013-02-08

2013-02-11

 2013-02-18

 2013-02-22

 2013-02-25

2013-02-04

2013-02-06

2013-02-08

 2013-02-18

 2013-02-20

 2013-02-22

2013-02-25

2013-02-27

2013-02-01

2013-02-04

2013-02-08

2013-02-20

2013-02-22

2013-02-25

2013-02-27

18

15

IS7

Action Level

--

--

--

--

--

--

2013-02-22

 2013-02-11

1

1

Limit Level

--

--

--

--

2013-02-04

2013-02-06

2013-02-08

2013-02-11

2013-02-13

2013-02-15

2013-02-18

2013-02-20

2013-02-25

 2013-02-01

 2013-02-04

 2013-02-06

 2013-02-08

 2013-02-11

 2013-02-18

 2013-02-20

 2013-02-22

 2013-02-25

2013-02-08

2013-02-18

2013-02-20

2013-02-25

 2013-02-01

2013-02-04

2013-02-08

2013-02-13

 2013-02-15

 2013-02-20

 2013-02-22

2013-02-25

2013-02-27

13

18

IS8

Action Level

--

--

--

--

2013-02-04

--

--

2013-02-18

1

1

Limit Level

--

--

--

--

2013-02-01

2013-02-06

2013-02-08

2013-02-11

2013-02-13

2013-02-15

2013-02-18

 

2013-02-04

2013-02-06

2013-02-08

2013-02-11

2013-02-13

2013-02-18

2013-02-20

 2013-02-18

 2013-02-20

2013-02-25

2013-02-01

2013-02-04

2013-02-08

2013-02-13

2013-02-15

2013-02-20

2013-02-22

2013-02-27

10

15


 

 

Station

Exceedance Level

DO

(S&M)

DO

(Bottom)

Turbidity

SS

Total number of exceedances

Ebb

Flood

Ebb

Flood

Ebb

Flood

Ebb

Flood

Ebb

Flood

IS(Mf)9

Action Level

--

--

--

--

--

2013-02-11

2013-02-25

--

2013-02-08

2013-02-13

2013-02-18

0

5

Limit Level

--

--

--

--

 

2013-02-01

2013-02-06

2013-02-08

2013-02-11

2013-02-13

2013-02-15

2013-02-18

2013-02-04

2013-02-06

2013-02-08

2013-02-13

2013-02-18

2013-02-20

2013-02-22

2013-02-18

2013-02-20

2013-02-01

2013-02-04

2013-02-06

2013-02-15

2013-02-20

2013-02-22

2013-02-25

2013-02-27

9

15

IS10

Action Level

--

--

--

--

2013-02-22

2013-02-01

2013-02-08

2013-02-20

--

2013-02-01

2013-02-15

1

5

Limit Level

--

--

--

--

2013-02-25

2013-02-04

2013-02-06

2013-02-18

2013-02-25

2013-02-04

2013-02-08

2013-02-13

2013-02-18

2013-02-20

2013-02-22

2013-02-27

2

10

SR3

Action Level

--

--

--

--

--

2013-02-22

2013-02-20

2013-02-27

1

2

Limit Level

--

--

--

--

2013-02-01

2013-02-04

2013-02-06

2013-02-08

2013-02-11

2013-02-13

2013-02-15

2013-02-18

2013-02-01

2013-02-04

2013-02-06

2013-02-08

2013-02-11

2013-02-13

2013-02-18

2013-02-04

2013-02-18

2013-02-25

2013-02-01

2013-02-04

2013-02-08

2013-02-13

2013-02-15

2013-02-20

2013-02-22

2013-02-25

11

15

SR4

Action Level

--

--

--

--

2013-02-13

2013-02-15

2013-02-13

2013-02-20

--

3

1

Limit Level

--

--

--

--

2013-02-04

2013-02-06

2013-02-08

2013-02-11

2013-02-18

2013-02-04

2013-02-06

2013-02-08

2013-02-11

2013-02-18

2013-02-20

2013-02-22

2013-02-25

2013-02-15

2013-02-25

2013-02-13

2013-02-15

2013-02-20

2013-02-22

2013-02-25

2013-02-27

7

14

SR5

Action Level

--

--

--

--

--

--

2013-02-06

2013-02-15

2013-02-25

2

1

Limit Level

--

--

--

--

2013-02-06

2013-02-08

2013-02-22

2013-02-25

2013-02-04

2013-02-08

2013-02-15

2013-02-18

2013-02-20

2013-02-04

2013-02-08

2013-02-11

2013-02-25

2013-02-01

2013-02-04

2013-02-08

2013-02-13

2013-02-15

2013-02-20

2013-02-22

2013-02-27

8

13

SR10A

Action Level

--

--

--

--

--

2013-02-08