Job No.: TCS00670/13

 

 

 

 

 

 

 

 

 

Agreement No. CE 45/2008 (CE)

Liantang/Heung Yuen Wai

Boundary Control Point and Associated Works

 

 

 

 

 

 

 

 

 

Baseline Monitoring Report

 

 

 

 

 

 

 

 

Prepared For

 

 

 

 

Civil Engineering and Development Department (CEDD)

 

 

 

 

 

 

 

 

 

 

 

Date

Reference No.

Prepared By

Certified By

16 August 2013

TCS00670/13/600/R0030v3

 

 

 

Version

Date

Remarks

1

15 July 2013

First Submission

2

16 July 2013

Amended against IEC’s comments on 15 July 2013

3

16 August 2013

Amended against EPD’s comments on 2 August 2013

 

 

 

 

 

 


executive summary

ES.01     Civil Engineering and Development Department (hereafter referred as “CEDD”) is the Project Proponent and the Permit Holder of Agreement No. CE 45/2008 (CE) Liantang / Heung Yuen Wai Boundary Control Point and Associated Works (hereinafter referred as “the Project”), which is a Designated Project to be implemented under Environmental Permit number EP-404/2011 (hereinafter referred as “the EP-404/2011” or “the EP”).

 

ES.02     Action-United Environmental Services & Consulting (hereinafter referred as “AUES”) has been commissioned as the Environmental Team for the Project (hereinafter referred as “the ET”) to perform relevant EM&A programme, including baseline and impact environmental monitoring in accordance with the EM&A Manual approved under the Environmental Impact Assessment Ordinance (EIAO).

 

ES.03     According to the Approved EM&A Manual, air quality, noise and water quality monitoring should be required to be monitored during the construction phase of the Project.  Pursuant to the EP, baseline environmental monitoring is required to be conducted prior to commencement of the construction works under the Project.  For the EP stipulation, baseline monitoring including air quality, noise and water quality was conducted from 13 June 2013 to 12 July 2013.  During the baseline monitoring period, no construction activities under the Project or other external influencing factors of significant concern were observed.

 

ES.04     This report summarizes the key findings and presents the process and rationale behind determining a set of Action and Limit Levels (A/L Levels) of air quality, construction noise and water quality based on the baseline data.  These A/L Levels will serve as the yardsticks for assessing the acceptability of the environmental impact during construction phase of the Project Works impact monitoring.  They are statistical in nature and derived according to the criteria set out in the Approved EM&A Manual.

 

ES.05     Results of the derived Action and Limit Levels for the air quality, noise and water quality are given in Tables ES-1, ES-2 and ES-3 as follows.

Table ES-1        Action and Limit Levels of Air Quality Monitoring

Monitoring Station

Action Level (mg /m3)

Limit Level (mg/m3)

1-hour TSP

24-hour TSP

1-hour TSP

24-hour TSP

AM1

265

143

500

260

AM2

268

149

500

260

AM3

269

145

500

260

AM4a

267

148

500

260

AM5

268

143

500

260

AM6

269

148

500

260

AM7a

275

156

500

260

AM8

269

144

500

260

AM9a

271

151

500

260

Table ES-2        Action and Limit Levels of Construction Noise Monitoring

Monitoring Location

Action Level

Limit Level in dB(A)

Time Period: 0700-1900 hours on normal weekdays

NM1, NM2, NM3, NM4, NM5, NM6, NM7, NM8, NM9, NM10

When one or more documented complaints are received

75 dB(A)Note 1

Note 1:     Acceptable Noise Levels for school should be reduced to 70 dB(A) and65 dB(A) during examination period

Note 2:     If works are to be carried out during restricted hours, the conditions stipulated in the construction noise permit issued by the NCA have to be followed.

Table ES-3        Action and Limit Levels of Water Quality Monitoring

Parameter

Performance criteria

Monitoring Location

WM1

WM2A

WM2B

WM3

WM4

DO (mg/L)

Action Level

(*)4.23

(**)4.00

(*)4.74

(**)4.00

(*)4.14

Limit Level

(#)4.19

(**)4.00

(#)4.60

(**)4.00

(#)4.08

Turbidity (NTU)

Action Level

51.3

24.9

11.4

13.4

35.2

AND  120% of upstream control station of the same day

Limit Level

67.6

33.8

12.3

14.0

38.4

AND  130% of upstream control station of the same day

SS (mg/L)

Action Level

54.5

14.6

11.8

12.6

39.4

AND  120% of upstream control station of the same day

Limit Level

64.9

17.3

12.4

12.9

45.5

AND  130% of upstream control station of the same day

Remarks:

(*)  The Proposed Action Level of Dissolved Oxygen is adopted to be used 5%-ile of baseline data

(**)                                The Proposed Action & Limit Level of Dissolved Oxygen is used 4mg/L

(#)  The Proposed Limit Level of Dissolved Oxygen is adopted to be used 1%-ile of baseline data

Notes:

All the figures given in the table are used for reference only and the EPD may amend the figures whenever it is considered necessary.

 

ES.6       In cases where exceedance of these criteria occurs, actions should be carried out in accordance with the Event Action Plan as shown the Approved EM&A Manual.

 


 

 

Table of Contents

1     Introduction   1

1.1            Project Background   1

1.2            Report Structure  1

2     Summary of Baseline Monitoring Requirement   3

2.1            General  3

2.2            Monitoring Parameters  3

2.3            Monitoring Locations  3

2.4            Monitoring Frequency and Period   6

2.5            Monitoring Equipment  7

2.6            Derivation of Action/Limit (A/L) Levels  9

3     Baseline monitoring methdology   10

3.1            General  10

3.2            Location of Baseline Monitoring   10

3.3            Monitoring Equipment at Baseline Monitoring   10

3.4            Monitoring Procedures  10

3.5            Data Management and Data QA/QC Control  12

4     Baseline Monitoring Results  13

4.1            General  13

4.2            Results of Air Quality Monitoring   13

4.3            Results of Noise Monitoring   17

4.4            Results of Water Quality Monitoring   17

4.5            Discussion and Recommendations  20

5     Conclusions and Recommentations  21

5.1            Conclusions  21

5.2            Recommendations  22

 


List of TABLES

Table 2-1        Summary of EM&A Requirements

Table 2-2        Proposed Alternative Location of Air Quality Monitoring

Table 2-3        Baseline Monitoring Stations - Air Quality

Table 2-4        Baseline Monitoring Stations - Construction Noise

Table 2-5        Baseline Monitoring Stations - Water Quality

Table 2-6        Air Quality Monitoring Equipment

Table 2-7        Construction Noise Monitoring Equipment

Table 2-8        Water Quality Monitoring Equipment

Table 2-9        Derivation of Action and Limit Levels for Air Quality

Table 2-10      Derivation of Action and Limit Levels for Construction Noise

Table 2-11      Derivation of Action and Limit Levels for Water Quality

Table 4-1        Summary of 24-hour and 1-hour TSP Monitoring Results – AM1

Table 4-2        Summary of 24-hour and 1-hour TSP Monitoring Results – AM2

Table 4-3        Summary of 24-hour and 1-hour TSP Monitoring Results – AM3

Table 4-4        Summary of 24-hour and 1-hour TSP Monitoring Results – AM4a

Table 4-5        Summary of 24-hour and 1-hour TSP Monitoring Results – AM5

Table 4-6        Summary of 24-hour and 1-hour TSP Monitoring Results – AM6

Table 4-7        Summary of 24-hour and 1-hour TSP Monitoring Results – AM7a

Table 4-8        Summary of 24-hour and 1-hour TSP Monitoring Results – AM8

Table 4-9        Summary of 24-hour and 1-hour TSP Monitoring Results – AM9a

Table 4-10      Action and Limit Levels for Air Quality Monitoring for all Stations

Table 4-11      Summaries of Noise Monitoring Results

Table 4-12      Action and Limit Levels of Construction Noise Monitoring

Table 4-13      Summary of Water Quality Monitoring Results - Dissolved Oxygen, mg/L

Table 4-14      Summary of Water Quality Monitoring Results - Turbidity, NTU

Table 4-15      Summary of Water Quality Monitoring Results – Suspended Solids, mg/L

Table 4-16      Action and Limit Levels for Water Quality Monitoring

 

 

List of Appendices

Appendix A    Layout Plan of the Project

Appendix B    Designated Monitoring Locations as Recommended in the Approved EM&A Manual

Appendix C    Sensitive Receivers Location for Baseline Monitoring

Appendix D    Valid Calibration Certificate of Monitoring Equipment

Appendix E    HOKLAS-accreditation Certificate of the Testing Laboratory.

Appendix F    Baseline Monitoring Schedules

Appendix G    Meteorological Data during Baseline Monitoring (Ta Kwu Ling Station)

Appendix H    Monitoring Results Data of the air quality (24-hour TSP), Noise and Water Quality

Appendix I     Laboratory Data Report

 

 

 


1                             Introduction

1.1              Project Background

1.1.1                 Civil Engineering and Development Department (hereafter referred as “CEDD”) is the Project Proponent and the Permit Holder of Agreement No. CE 45/2008 (CE) Liantang / Heung Yuen Wai Boundary Control Point and Associated Works (hereinafter referred as “the Project”), which is a Designated Project to be implemented under Environmental Permit number EP-404/2011 (hereinafter referred as “the EP-404/2011” or “the EP”). 

 

1.1.2                 The Project consists of two main components: Construction of a Boundary Control Point (hereinafter referred as “BCP”); and Construction of a connecting road alignment.  Layout plan of the Project is shown in Appendix A.

 

1.1.3                 The proposed BCP is located at the boundary with Shenzhen near the existing Chuk Yuen Village, comprising a main passenger building with passenger and cargo processing facilities and the associated customs, transport and ancillary facilities.  The connecting road alignment consists of six main sections:

1)          Lin Ma Hang to Frontier Closed Area (FCA) Boundary – this section comprises at-grade and viaducts and includes the improvement works at Lin Ma Hang Road;

2)          Ping Yeung to Wo Keng Shan – this section stretches from the Frontier Closed Area Boundary to the tunnel portal at Cheung Shan and comprises at-grade and viaducts including an interchange at Ping Yeung;

3)          North Tunnel – this section comprises the tunnel segment at Cheung Shan and includes a ventilation building at the portals on either end of the tunnel;

4)          Sha Tau Kok Road – this section stretches from the tunnel portal at Wo Keng Shan to the tunnel portal south of Loi Tung and comprises at-grade and viaducts including an interchange at Sha Tau Kok and an administration building;

5)          South Tunnel – this section comprises a tunnel segment that stretches from Loi Tung to Fanling and includes a ventilation building at the portals on either end of the tunnel as well as a ventilation building in the middle of the tunnel near Lau Shui Heung;

6)          Fanling – this section comprises the at-grade, viaducts and interchange connection to the existing Fanling Highway.

 

1.1.4                 Action-United Environmental Services & Consulting (hereinafter referred as “AUES”) has been commissioned as an Independent Environmental Team (hereinafter referred as “the ET”) to implement the relevant EM&A program in accordance with the approved EM&A Manual, as well as the associated duties.  As part of the EM&A program, baseline monitoring is required to determine the ambient environmental conditions.  Therefore, baseline monitoring was carried out between 13 June 2013 and 12 July 2013 for all parameters including air quality, noise and water quality before construction work commencement.

 

1.1.5                 14 consecutive days of air quality and noise monitoring requirements had been undertaken at the all designated locations from 13 June 2013 to 12 July 2013; also a 4-weeks water quality monitoring had been carried out at eleven locations as designated in the EM&A Manual from 14 June 2013 to 10 July 2013.  During the baseline monitoring period, there were no construction activities of this project or other external influencing factors of significant concern observed by the ET.

 

1.1.6                 This Baseline Monitoring Report presents the details of the baseline study including project background, monitoring methodology, monitoring results, summary of findings, and Action/Limit (A/L) Levels established for subsequent use in the Project construction phase EM&A program.

 

1.2              Report Structure

1.2.1                 The Baseline Monitoring Report is structured into the following sections:-

Section 1    Introduction

Section 2    Summaries of Baseline Monitoring Requirement.

Section 3    Baseline Monitoring Methodology

Section 4    Baseline Monitoring Results

Section 5    Conclusion and Recommendation

 

 

 

 


2                             Summary of Baseline Monitoring Requirement

2.1              General

2.1.1                 The Environmental Monitoring and Audit requirements are set out in the Approved EM&A manual. Environmental issues such as air quality, construction noise and water quality were identified as the key issues during the construction phase of the Project.

 

2.1.2                 This report presents the results obtained during the baseline monitoring program of air, noise and steam/river water between 13 June 2013 and 12 July 2013.  A summary of the baseline EM&A requirements for air, noise and water monitoring are presented in the sub-sections below.

 

2.2              Monitoring Parameters

2.2.1                 The EM&A baseline monitoring program shall cover the following environmental issues:

                     Air quality;

                     Construction noise; and

                     Water quality.

 

2.2.2                 A summary of the monitoring parameters is presented in Table 2-1 below

Table 2-1         Summary of EM&A Requirements

Environmental Issue

Parameters

Air Quality

Ÿ  1-hour TSP by Real-Time Portable Dust Meter; and

Ÿ  24-hour TSP by High Volume Air Sampler.

Noise

Ÿ  Leq (30min) in normal working days (Monday to Saturday) 07:00-19:00 except public holiday; and

Ÿ  3 sets of consecutive Leq (5min) on restricted hours i.e. 19:00 to 07:00 next day, and whole day of public holiday or Sunday

Water Quality

In-situ Measurements

Ÿ  Dissolved Oxygen Concentration (mg/L);

Ÿ  Dissolved Oxygen Saturation (% );

Ÿ  Turbidity (NTU);

Ÿ  pH unit;

Ÿ  Water depth (m); and

Ÿ  Temperature ().

Laboratory Analysis

Ÿ  Suspended Solids (mg/L)

 

2.3              Monitoring Locations

2.3.1                 The designated monitoring locations as recommended in the EM&A Manual are shown in Appendix B.  As access to some of the designated monitoring locations was questionable due to safety reason or denied by the landlords, alternative locations have been proposed. The proposal of alternative monitoring locations has been updated in the revised EM&A Programme which verified by IEC and certified by ET prior submitted to EPD on 10 July 2013.

 

Air Quality

2.3.2                 Baseline monitoring for air quality should be conducted at nine air sensitive receivers (hereinafter referred as “ASR”) as designated in the approved EM&A Manual. During site visit by the Contractor and ET, access to three designated air monitoring locations namely AM4, AM7 and AM9 were denied by the landlords of the ASR for HVS installation. Therefore, alternative locations namely AM4a, AM7a and AM9a are proposed based on the following criteria:

1)             At the site boundary or such locations close to the major dust emission source;

2)             Close to the sensitive receptors;

3)             Take into account the prevailing meteorological conditions;

4)             For monitoring location located in the vicinity of the ASRs, care shall be taken to cause minimal disturbance to the occupants during monitoring.

5)             When positioning the HVS, the following points shall be noted:

a.              a horizontal platform with appropriate support to secure the samples against gusty wind shall be provided;

b.             no two samplers shall be placed less than 2m apart;

c.              the distance between the HVS and an obstacle, such as buildings, must be at least twice the height that the obstacle protrudes above the HVS;

d.             a minimum of 2 m separation from walls, parapets and penthouses is required for HVS at the rooftop;

e.              a minimum of 2 m separation from any supporting structure, measures horizontally is required;

f.              no furnace or incinerator flue is nearby;

g.              airflow around the sampler is unrestricted;

h.             the HVS is more than 20 m from the dripline;

i.               any wire fence and gate to protect the HVS, shall not cause any obstruction during monitoring;

j.               permission must be obtained to set up the HVS and to obtain access to the monitoring stations; and

k.             a secured supply of electricity is needed to operate the HVS.

 

2.3.3                 The proposed alternative locations of air quality monitoring are detailed in Table 2-2 below.

Table 2-2        Proposed Alternative Location of Air Quality Monitoring

Station ID

Location nearby the Work Area

Conclusion and Consideration during site visit

AM4a

LMH to Frontier Closed Area

Alternative location is a village house located at about 160m east side of the original point AM4 in figure 2.1.  AM4a is recommended as it is the closest residential location with secured electric access and covering the construction work at east side.

AM7a

Sha Tau Kok Road

Alternative location is the front yard of another village (nameless) aligns to Sha Tau Kok Road – Wo Hang Section proximity to Tai Tong Wu Village.  AM7a is about 140m away from the original point AM7 in figure 2.1 but it is more close to the site area.  AM7a is recommended as it is located just at the front of the residential area with secured electric access.  It is more close to the construction site than original point, i.e. more sensitive.

AM9a

Fanling

Alternative location Nam Wa Po Village House No. 71 is located about 29m away from the original point AM9.   AM9a is recommended as it is the closest residential location with secured electric access and covering the construction work area.

 

2.3.4                 The proposed alternative locations are considered capable of effectively representing the baseline conditions at the impact monitoring locations. The proposal on alternative monitoring locations has been submitted to EPD upon agreement of the Engineer and certification by the IEC as stated in previous Section 2.3.1.

 

2.3.5                 Hence, the sensitive receivers conducted the baseline air monitoring under the Project is listed in Table 2-3 and shown in Appendix C.

Table 2-3        Baseline Monitoring Stations - Air Quality

Station ID

ASR ID in EM&A Manual

Description

Works Area

AM1

TYH

Tsung Yuen Ha Village House No. 63

BCP

AM2

V1

Village House near Lin Ma Hang Road

LMH to Frontier Closed Area

AM3

TKL2

Ta Kwu Ling Fire Service Station of Ta Kwu Ling Village.

LMH to Frontier Closed Area

AM4a

KTW4

A village house located at about 160m east side of the original point AM4

LMH to Frontier Closed Area

AM5

PY1

Ping Yeung Village House

Ping Yeung to Wo Keng Shan

AM6

WKS7

Wo Keng Shan Village House

Ping Yeung to Wo Keng Shan

AM7a

NA

Another village (nameless) aligns to Sha Tau Kok Road – Wo Hang Section proximity to Tai Tong Wu Village.  The location is about 140m away from the original point AM7

Sha Tau Kok Road

AM8

PKT2

Po Kat Tsai Village No. 4

Po Kat Tsai

AM9a

NWP1

Nam Wa Po Village House No. 71

Fanling

 

Construction Noise

2.3.6                 Ten noise sensitive receivers (hereinafter referred “the NSR”) are designated to be the monitoring stations in the EM&A Manual. They are listed in Table 2-4 and shown in Appendix C.

Table 2-4        Baseline Monitoring Stations - Construction Noise

Station ID

ASR ID in

EM&A Manual

Description

Works Area

NM1

TYH

Tsung Yuen Ha Village House No. 63

BCP

NM2

V2

Village House near Lin Ma Hang Road

Lin Ma Hang to Frontier Closed Area

NM3

PY2

Ping Yeung Village House (facade facing northeast)

Ping Yeung to Wo Keng Shan

NM4

WKS6

Wo Keng Shan Village House

Ping Yeung to Wo Keng Shan

NM5

LT1

Village House, Loi Tung

Sha Tau Kok Road

NM6

TTW2

Tai Tong Wu Village House 2

Sha Tau Kok Rpad

NM7

PKT2

Po Kat Tsai Village

Po Kat Tsai

NM8

TH1

Village House, Tong Hang

Fanling

NM9

KT3

Village House, Kiu Tau Village

Fanling

NM10

NWP1

Nam Wa Po Village House No. 78

Fanling

 

Water Quality

2.3.7                 The water quality baseline monitoring should be conducted at monitoring stations recommended in the EM&A Manual.  Total eleven water quality monitoring locations including control stations and impact stations were designated for the Project.

 

2.3.8                 Water quality monitoring stations WM1-Control, WM2B and WM3 have been identified and confirmed.  However, access to other monitoring stations is questionable due to safety reason. Alternative monitoring locations are proposed according to the following criteria:

1)             at locations close to and preferably at the boundary of the mixing zone of the major site activities as indicated in the EIA report, which are likely to have water quality impacts;

2)             close to the sensitive receptors which are directly or likely to be affected;

3)             for monitoring locations located in the vicinity of the sensitive receptors, care should be taken to cause minimal disturbance during monitoring;

4)             two or more control stations which should be at locations representative of the project site in its undisturbed condition. Control stations should be located, as far as is practicable, both upstream and down-stream of the works area.

 

2.3.9                 Moreover, control stations are necessary to compare the water quality from potentially impacted sites with the ambient water quality. Control stations shall be located within the same body of water as the impact monitoring stations but shall be outside the area of influence of the works and, as far as practicable, not affected by any other works.

 

2.3.10             The actual location (coordinate) was carried out baseline water quality monitoring are listed in Table2-5 and shown in Appendix C. 


Table 2-5        Baseline Monitoring Stations - Water Quality

Station ID

Description

Location Designated in EM&A Manual

Proposed Location

Nature of the location

Coordinates

Coordinates

Easting

Northing

Easting

Northing

WM1

Downstream of Kong Yiu Channel

833669

845371

833679

845421

upstream 51m

WM1-Control

Upstream of Kong Yiu Channel

834185

845917

834185

845917

NA

WM2A

Downstream of River Ganges

834132

844433

834204

844471

downstream 81m

WM2A-Control

Upstream of River Ganges

835205

844200

835270

844243

upstream 78m

WM2B

Downstream of River Ganges

835435

843395

835433

843397

NA

WM2B-Control

Upstream of River Ganges

835846

843344

835835

843351

downstream 31m

WM3

Downstream of River Indus

836324

842405

836324

842407

NA

WM3-Control

Upstream of River Indus

836763

842426

836763

842400

downstream 26m

WM4

Downstream of Ma Wat Channel

833841

838345

833850

838338

upstream 11m

WM4–Control A

Kau Lung Hang Stream

834039

837669

834028

837695

downstream 28m

WM4–Control B

Upstream of Ma Wat Channel

833769

837406

833760

837395

upstream 15m

 

2.3.11             The water quality at both original and alternative locations is not anticipated to have significant difference. The proposal of alternative monitoring locations has been submitted to EPD upon agreement of the RE and verified by the IEC as stated in previous Section 2.3.1.

 

2.3.12             Since the changes of water monitoring locations were not significant (less than 100m), Figure 4.1 of the EM&A Manual would remain unchanged.

 

2.4              Monitoring Frequency and Period

The requirements of baseline monitoring are stipulated in Sections 2.1.5, 3.1.4 and 4.1.5 of the approved EM&A Manual and presented as follows.

 

Air Quality Monitoring

2.4.1                 Monitoring frequency for air quality baseline monitoring is as follows:

Ÿ   1-Hour TSP

3 sets of 1-Hour TSP monitoring shall be carried out daily for a period of at least two weeks.

Ÿ   24-Hour TSP

Continuous monitoring of 24-Hour shall be carried out daily for a period of at least two weeks.

 

Noise Monitoring

2.4.2                 The baseline noise monitoring shall be carried out daily for a period of at least two weeks. The baseline noise levels for the time period between 0700 and 1900 hours on normal weekdays will be measured in terms of Leq (30 minutes).  For all other time periods, i.e. restricted time period (19:00 to 07:00 the next morning and whole day on public holidays) (hereinafter referred as “the restricted hours”) will not be included in the baseline monitoring as they do not carry significance with the following rationales:

  Setting A/L Levels for construction noise is not based on baseline noise levels at any monitoring stations (refer to the following Section 3.6: Action/Limit Levels and Event Action Plan); and

  No construction activities are to be undertaken during the restricted hours, no construction noise impacts related to the works under the Project are therefore envisaged during the restricted hours.

 

Water Quality Monitoring

2.4.3                 The baseline monitoring frequency shall be 3 days per week, for at least 4 weeks prior to the commencement of construction works.  The interval between two sets of monitoring shall not be less than 36 hours.

 

2.5              Monitoring Equipment

Air Quality Monitoring

2.5.1                 The 24-hour and 1-hour TSP levels shall be measured by following the standard high volume sampling method as set out in the Title 40 of the Code of Federal Regulations, Chapter 1 (Part 50), Appendix B.  If the ET proposes to use a direct reading dust meter to measure 1-hour TSP levels, it shall submit sufficient information to the IEC to approve.

 

2.5.2                 The filter paper of 24-hour TSP measurement shall be determined by HOKLAS accredited laboratory.

 

2.5.3                 All equipment to be used for baseline air quality monitoring is listed in Table 2-6.

Table 2-6         Air Quality Monitoring Equipment

Equipment

Model

24-Hr TSP

High Volume Air Sampler

TISCH High Volume Air Sampler, HVS Model TE-5170

Calibration Kit

TISCH Model TE-5028A

1-Hour TSP

Portable Dust Meter

Sibata LD-3 Laser Dust monitor Particle Mass Profiler & Counter

 

Wind Data Monitoring Equipment

2.5.4                 According to the approved EM&A Manual, wind data monitoring equipment shall also be provided and set up for logging wind speed and wind direction near the dust monitoring locations.  The equipment installation location shall be proposed by the ET and agreed with the IEC.  For installation and operation of wind data monitoring equipment, the following points shall be observed:

1)          The wind sensors should be installed 10 m above ground so that they are clear of obstructions or turbulence caused by buildings.

2)          The wind data should be captured by a data logger. The data shall be downloaded for analysis at least once a month.

3)          The wind data monitoring equipment should be re-calibrated at least once every six months.

4)          Wind direction should be divided into 16 sectors of 22.5 degrees each.

 

2.5.5                 In order to do so, ET has liaised with the landlords of the successful granted HVS installation premises.  However, the owners rejected to provide premises for wind data monitoring equipment installation.

 

2.5.6                 In under this situation, the ET proposed alternative methods to obtain representative wind data.  Meteorological information as extracted from “the Hong Kong Observatory Ta Kwu Ling Station” is alternative method to obtain representative wind data.  For Ta Kwu Ling Station, it is located nearby the Project site.  Moreover, this station is situated the sea level above 15mPD.  The station’s wind data monitoring equipment is set above the existing ground ten meters in compliance with the general setting up requirement.  Furthermore, this station also can be to provide the humidity, rainfall, and air pressure and temperature etc. meteorological information.  In Hong Kong of a lot development projects, weather information extracted from Hong Kong Observatory is common alternative method if weather station installation not allowed.

 

Noise Monitoring

2.5.7                 Sound level meter in compliance with the International Electrotechnical Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications shall be used for carrying out the noise monitoring.  The sound level meter shall be checked using an acoustic calibrator.  The wind speed shall be checked with a portable wind speed meter capable of measuring the wind speed in m s-1.

 

2.5.8                 Noise monitoring equipment to be used for baseline monitoring is listed in Table 2-7.

Table 2-7         Construction Noise Monitoring Equipment

Equipment

Model

Integrating Sound Level Meter

B&K Type 2238 or Rion NL-14

Calibrator

Rion NC-73 / B&K Type 4231

Portable Wind Speed Indicator

Testo Anemometer

 

2.5.9                 Sound level meters listed above comply with the International Electrotechnical Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications, as recommended in TM issued under the NCO.  The acoustic calibrator and sound level meter to be used in the baseline monitoring will be calibrated yearly..

 

Water Quality Monitoring

2.5.10             DO and water temperature should be measured in-situ by a DO/temperature meter. The instrument should be portable and weatherproof using a DC power source. It should have a membrane electrode with automatic temperature compensation complete with a cable. The equipment should be capable of measuring:

  a DO level in the range of 0-20 mg/l and 0-200% saturation; and

  a temperature of between 0 and 45 degree Celsius.

 

2.5.11             A portable pH meter capable of measuring a range between 0.0 and 14.0 should be provided to measure pH under the specified conditions accordingly to the APHA Standard Methods.

 

2.5.12             The instrument should be portable and weatherproof using a DC power source. It should have a photoelectric sensor capable of measuring turbidity between 0-1000 NTU.

 

2.5.13             A portable, battery-operated echo sounder or tape measure will be used for the determination of water depth at each designated monitoring station as appropriate.

 

2.5.14             A water sampler e.g. Kahlsico Water Sampler, which is a transparent PVC cylinder with capacity not less than 2 litres, will be used for water sampling if water depth over than 0.5m.   For sampling from very shallow water depths e.g. <0.5 m, water sample collection will be directly from water surface below 100mm use sampling plastic bottle to avoid inclusion of bottom sediment or humus.  Moreover, Teflon/stainless steel bailer or self-made sampling buckets maybe used for water sampling.  The equipment used for sampling will be depended the sampling location and depth situations.

 

2.5.15             Water samples for laboratory measurement of SS will be collected in high density polythene bottles, packed in ice (cooled to 4 ºC without being frozen), and delivered to the laboratory in the same day as the samples were collected.

 

2.5.16             Analysis of suspended solids should be carried out in a HOKLAS or other accredited laboratory. Water samples of about 1L should be collected at the monitoring stations for carrying out the laboratory suspended solids determination.  The SS determination work should start within 24 hours after collection of the water samples. The SS analyses should follow the APHA Standard Methods 2540D with Limit of Reporting of 2 mg/L.

 

2.5.17             Water quality monitoring equipment used in the baseline monitoring is listed in Table 2-8.  Suspended solids (SS) analysis is carried out by a local HOKLAS-accredited laboratory, namely ALS Technichem (HK) Pty Ltd.

Table 2-8         Water Quality Monitoring Equipment

Equipment

Model

Water Depth Detector

Eagle Sonar or tape measures

Water Sampler

A 2-litre transparent PVC cylinder with latex cups at both ends or teflon/stainless steel bailer or self-made sampling bucket

Thermometer & DO meter

YSI 550A Handheld Dissolved Oxygen Instrument

pH meter

The EcoSense ® pH10A pen-style instrument

Turbidimeter

Hach 2100Q

Sample Container

High density polythene bottles (provided by laboratory)

Storage Container

‘Willow’ 33-liter plastic cool box with Ice pad

 

2.6              Derivation of Action/Limit (A/L) Levels

2.6.1                 The baseline results form the basis for determining the environmental acceptance criteria for the impact monitoring.  A summary of derivation of Action/Limit (A/L) Levels for air quality, construction noise and water quality are shown in Table 2-9, 2-10 and 2-11 respectively.

Table 2-9        Derivation of Action and Limit Levels for Air Quality

Parameter

Action Level

Limit Level

24-hour TSP

For baseline level £ 200 mg/m3:

Action level = (Baseline × 1.3 + Limit level)/2

> 260 mg/m3

For baseline level > 200 mg/m3:

Action level = Limit level

1-hour TSP

For baseline level £ 384 mg/m3:

Action level = (Baseline × 1.3 + Limit level)/2

> 500 mg/m3

For baseline level > 384 mg/m3:

Action level = Limit level

 

Table 2-10       Derivation of Action and Limit Levels for Construction Noise

Time Period

Action Level in dB(A)

Limit Level in dB(A)

0700-1900 hours on normal weekdays

When one documented complaint is received

> 75* dB(A)

Note:     (*)      Reduces to 70 dB(A) for schools and 65 dB(A) during the school examination periods.

 

Table 2-11       Derivation of Action and Limit Levels for Water Quality

Parameters

Action

Limit

DO in mg/l

5 percentile of baseline data

4 mg/L or 1 percentile of baseline data

SS in mg/l

95 percentile of baseline data or 120% of upstream control station of the same day

99 percentile of baseline data or 130% of upstream control station of the same day

Turbidity in NTU

95 percentile of baseline data or 120% of upstream control station of the same day

99 percentile of baseline data or 130% of upstream control station of the same day

Notes:

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

2.          For SS and turbidity, non-compliance of water quality results when monitoring results is higher than the limits.

3.          All the figures given in the table are used for reference only and the EPD may amend the figures whenever necessary.

 


3                             Baseline monitoring methdology

3.1              General

3.1.1                 The baseline monitoring program of air, noise and water were conducted between 13 June 2013 and 12 July 2013.  During the baseline monitoring period, there were no construction activities of this project or other external influencing factors of significant concern observed by the ET.

 

3.2              Location of Baseline Monitoring

3.2.1                 Baseline air quality, noise and water quality monitoring has been undertaken at the all monitoring stations between 13 June 2013 and 12 July 2013; also a 4-week baseline water quality monitoring program has been carried out at eleven designated locations from 14 June 2013 to 10 July 2013.  The detailed information of monitoring stations to be referred to Tables 2-3, 2-4 and 2-5, and the graphical plot of monitoring locations is shown in Appendix C in this report.

 

3.3              Monitoring Equipment at Baseline Monitoring

3.3.1                 All the monitoring equipment to be used in the EM&A program as listed in Tables 2-6, 2-7 and 2-8 has been agreed with the IEC prior to commencement of the baseline monitoring.

 

3.4              Monitoring Procedures

Air Quality

1-hour TSP

3.4.1                 The 1-Hour TSP monitor, a Sibata LD-3 Laser Dust monitor Particle Mass Profiler & Counter was used for baseline monitoring, which is a portable, battery-operated laser photometer. The 1-hour TSP meter provides a real time 1-hour TSP measurement based on 900 light scattering. The 1-hour TSP monitor consisted of the following:

a.              A pump to draw sample aerosol through the optic chamber where TSP is measured;

b.             A sheath air system to isolate the aerosol in the chamber to keep the optics clean for maximum reliability; and

c.              A built-in data logger compatible with Windows based program to facilitate data collection, analysis and reporting.

 

3.4.2                 The 1-hour TSP meter used is within the valid period, calibrated by the manufacturer prior to purchasing. Zero response of the instrument was checked before and after each monitoring event.  Operation of the 1-hour TSP meter was follow manufacturer’s Operation and Service Manual.  A valid calibration certificate is attached in Appendix D.

 

24-hour TSP

3.4.3                 The equipment used for 24-hour TSP measurement is a Tisch Environmental, Inc. Model TE-5170 TSP high volume air sampling system, which complied with EPA Code of Federal Regulation, Appendix B to Part 50. The High Volume Air Sampler (HVS) consists of the following:

a.              An anodized aluminum shelter;

b.             A 8”x10” stainless steel filter holder;

c.              A blower motor assembly;

d.             A continuous flow/pressure recorder;

e.              A motor speed-voltage control/elapsed time indicator;

f.              A 7-day mechanical timer, and

g.              A power supply of 220v/50 hz

 

3.4.4                 Prior of 24-hour TSP monitoring, the HVS was calibrated in accordance with the manufacturer’s instruction using the NIST-certified standard calibrator (Tisch Calibration Kit Model TE-5028A).  The 24-hour TSP Monitoring using the HVS was also processed in accordance with the manufacturer’s Operations Manual.  A valid calibration certificate of the calibration kit with the certificate of HVS calibrated is attached in Appendix D.

 

3.4.5                 24-hour TSP was collected by the ET on filters of HVS and quantified by a local HOKLAS accredited laboratory, ALS Technichem (HK) Pty Ltd (ALS), upon receipt of the samples.  The ET keeps all the sampled 24-hour TSP filters in normal air conditioned room conditions, i.e. 70% HR (Relative Humidity) and 25oC, for six months prior to disposal.

 

Construction Noise

3.4.6                 Sound level meter listed above comply with the International Electrotechnical Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications, as recommended in Technical Memorandum (TM) issued under the Noise Control Ordinance (NCO), which was used for baseline noise monitoring.  A valid of calibration certificates including sound level meter and an acoustic were shown in Appendix D.

 

3.4.7                 The noise measurement was performed with the meter set to FAST response and on the A-weighted equivalent continuous sound pressure level (Leq).  Leq(30min) in six consecutive Leq(5 min) measurements were used as the monitoring parameter throughout the baseline monitoring period.

 

3.4.8                 During the baseline monitoring, the sound level meter was mounted on a tripod at a height of about 1.2 m and placed at the monitoring locations and oriented such that the microphone was pointed to the site with the microphone facing perpendicular to the line of sight. The windshield was fitted for the measurement.  For the baseline noise monitoring, all monitoring stations were conducted 1 m from the exterior of the building façade.

 

3.4.9                 Prior baseline noise measurement, the accuracy of the sound level meter was checked using an acoustic calibrator generating a known sound pressure level at a known frequency.  The calibration level from before and after the noise measurement agrees to within 1.0dB.

 

3.4.10             During the noise measurement, a portable wind speed meter was used to check wind speed (m/s).  For baseline noise monitoring, no wind speed was exceeding 5m/s or gusts exceeding 10m/s.  Also, noise measurement in time was no fog and rain.

 

Water Quality

3.4.11             Water quality monitoring was conducted at the eleven designated locations. The sampling and in-situ measurement process are below:

 

Sampling Procedure

3.4.12             A Digital Global Positioning System (GPS) was used to identify the designated monitoring stations.  Prior to water sampling, a portable, battery-operated echo sounder or tape measure was used for the determination of water depth at each station.  At each station, water samples were collected from 0.1m below water surface or water surface to prevent the river bed sediment for stirring.

 

3.4.13             The sample container was rinsed with a portion of the water sample.  The water sample then was transferred to the high-density polythene bottles as provided by the laboratory, labeled with a unique sample number and sealed with a screw cap.

 

3.4.14             Before commencement of the sampling, general information such as the date and time of sampling and weather condition as well as the personnel responsible for the monitoring were be recorded on the monitoring field data sheet.

 

3.4.15             A ‘Willow’ 33-liter plastic cool box packed with ice was used to preserve the collected water samples prior to arrival at the laboratory for chemical determination.  The water temperature of the cool box was maintained at a temperature as close to 4 as possible without being frozen.  Samples collected were delivered to the laboratory upon collection.

 

In-situ Measurement

3.4.16             YSI 550A Handheld Dissolved Oxygen Instrument was used for water in-situ measures, which automates the measurements and data logging of temperature, dissolved oxygen and dissolved oxygen saturation.  Before each round of monitoring, the dissolved oxygen probe was calibrated by the wet bulb method.

 

3.4.17             A portable EcoSense ® pH10A pen-style instrument was used for in-situ pH measurement. The pH meter is capable of measuring pH in the range of 0 – 14 and readable to 0.1. Standard buffer solutions of pH 7 and pH 10 are used for calibration of the instrument before and after measurement.

 

3.4.18             A portable Hach 2100Q Turbidimeter was used for in-situ turbidity measurement. The turbidity meter is capable of measuring turbidity in the range of 0 – 1000 NTU.  StablCal® Standards 10NTU and 100NTU are used for calibration of the instrument before and after measurement.

 

3.4.19             The all in-situ measurement equipment was calibrated by HOKLAS accredited laboratory of three month interval.  Valid certificates are shown in Appendix D.

 

Laboratory Analysis

3.4.20             All water samples were analyzed with Suspended Solids (SS) as specified in the EM&A Manual by a local HOKLAS-accredited testing laboratory (ALS Technichem (HK) Pty Ltd HOKLAS registration no. 66).  SS analysis was determined by the laboratory upon receipt of the water samples using APHA Standard Methods 2540D.  HOKLAS-accreditation certificate of the testing laboratory is provided in Appendix E.  The SS determination is started within 48 hours upon receipt, which is well within the required maximum sample storage time of the parameter of 7 days.

 

3.5              Data Management and Data QA/QC Control

3.5.1                 The baseline monitoring data were handled by the ET’s in-house data recording and management system.

 

3.5.2                 The monitoring data recorded in the equipment were downloaded directly from the equipment at the end of each monitoring day.  The downloaded monitoring data were input into a computerized database properly maintained by the ET.  The laboratory results were input directly into the computerized database and checked by personnel other than those who input the data.

 

3.5.3                 For monitoring parameters that require laboratory analysis, the local laboratory shall follow the QA/QC requirements as set out under the HOKLAS scheme for the relevant laboratory tests

 

 


4                             Baseline Monitoring Results

4.1              General

4.1.1                 The baseline monitoring schedules are presented in Appendix F and the monitoring results are detailed in the following sub-sections.

 

4.2              Results of Air Quality Monitoring

4.2.1                 Baseline air quality monitoring was carried out form 13 June 2013 to 12 July 2013.  The results for 24-hour and 1-hour TSP are summarized in Tables 4-1 to 4-9.  The 24-hour TSP data are shown in Appendix G.

Table 4-1         Summary of 24-hour and 1-hour TSP Monitoring Results – AM1

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st Measurement

2nd Measurement

3rd Measurement

29-Jun-13

19

27-Jun-13

12:13

27

28

31

30-Jun-13

23

28-Jun-13

13:15

30

33

31

1-Jul-13

20

29-Jun-13

10:15

27

29

30

2-Jul-13

17

30-Jun-13

12:45

23

22

21

3-Jul-13

16

1-Jul-13

10:55

20

21

23

4-Jul-13

22

2-Jul-13

10:00

22

24

26

5-Jul-13

20

3-Jul-13

13:41

29

23

21

6-Jul-13

17

4-Jul-13

13:45

19

21

25

7-Jul-13

16

5-Jul-13

14:30

13

17

19

8-Jul-13

14

6-Jul-13

13:14

12

13

14

9-Jul-13

19

7-Jul-13

14:30

14

15

17

10-Jul-13

18

8-Jul-13

10:10

25

27

29

11-Jul-13

28

9-Jul-13

14:30

25

27

30

12-Jul-13

24

10-Jul-13

10:50

24

26

29

Average

(Range)

20

(14-28)

Average

(Range)

23

(12-33)

 

Table 4-2         Summary of 24-hour and 1-hour TSP Monitoring Results – AM2

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st Measurement

2nd Measurement

3rd Measurement

27-Jun-13

32

27-Jun-13

12:25

22

23

25

28-Jun-13

25

28-Jun-13

13:22

33

35

37

29-Jun-13

30

29-Jun-13

10:21

22

24

25

30-Jun-13

24

30-Jun-13

12:40

19

20

21

1-Jul-13

22

1-Jul-13

10:45

18

20

21

2-Jul-13

26

2-Jul-13

10:15

19

21

22

3-Jul-13

22

3-Jul-13

13:54

27

24

29

4-Jul-13

23

4-Jul-13

13:30

15

16

18

5-Jul-13

40

5-Jul-13

14:50

39

40

42

6-Jul-13

26

6-Jul-13

13:00

25

28

29

7-Jul-13

34

7-Jul-13

14:39

18

20

20

8-Jul-13

37

8-Jul-13

10:00

31

33

36

9-Jul-13

33

9-Jul-13

14:21

33

34

36

10-Jul-13

31

10-Jul-13

11:15

33

33

36

Average

(Range)

29

(22-40)

Average

(Range)

27

(15-42)


Table 4-3         Summary of 24-hour and 1-hour TSP Monitoring Results – AM3

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st Measurement

2nd Measurement

3rd Measurement

27-Jun-13

23

27-Jun-13

12:30

25

26

28

28-Jun-13

20

28-Jun-13

13:30

48

50

48

29-Jun-13

18

29-Jun-13

10:30

35

37

33

30-Jun-13

20

30-Jun-13

12:30

14

15

13

1-Jul-13

20

1-Jul-13

10:40

15

17

18

2-Jul-13

17

2-Jul-13

13:17

13

15

16

3-Jul-13

19

3-Jul-13

14:15

28

24

32

4-Jul-13

25

4-Jul-13

10:20

17

18

18

5-Jul-13

20

5-Jul-13

09:35

22

27

29

6-Jul-13

24

6-Jul-13

10:00

21

22

22

7-Jul-13

19

7-Jul-13

15:00

32

37

35

8-Jul-13

29

8-Jul-13

11:20

53

49

41

9-Jul-13

30

9-Jul-13

14:15

39

42

44

10-Jul-13

34

10-Jul-13

11:24

30

33

34

Average

(Range)

23

(17-34)

Average

(Range)

29

(13-53)

 

Table 4-4         Summary of 24-hour and 1-hour TSP Monitoring Results – AM4a

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st Measurement

2nd Measurement

3rd Measurement

13-Jun-13

23

13-Jun-13

10:50

35

35

34

14-Jun-13

22

14-Jun-13

12:12

33

33

36

15-Jun-13

20

15-Jun-13

11:00

33

33

35

16-Jun-13

21

16-Jun-13

10:00

20

21

22

17-Jun-13

22

17-Jun-13

10:22

22

25

31

18-Jun-13

24

18-Jun-13

10:30

13

14

14

19-Jun-13

33

19-Jun-13

10:15

26

27

28

20-Jun-13

37

20-Jun-13

13:04

33

36

37

21-Jun-13

39

21-Jun-13

13:30

13

16

16

22-Jun-13

29

22-Jun-13

10:00

18

19

19

23-Jun-13

30

23-Jun-13

10:45

19

20

22

24-Jun-13

26

24-Jun-13

10:55

20

29

22

25-Jun-13

30

25-Jun-13

11:27

39

42

45

26-Jun-13

26

26-Jun-13

09:45

20

22

24

Average

(Range)

27

(20-39)

Average

(Range)

26

(13-45)

 

Table 4-5         Summary of 24-hour and 1-hour TSP Monitoring Results – AM5

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st Measurement

2nd Measurement

3rd Measurement

13-Jun-13

24

13-Jun-13

10:45

31

33

33

14-Jun-13

16

14-Jun-13

11:00

35

36

35

15-Jun-13

15

15-Jun-13

13:09

35

37

38

16-Jun-13

17

16-Jun-13

10:09

22

24

23

17-Jun-13

14

17-Jun-13

10:35

31

33

28

18-Jun-13

15

18-Jun-13

13:35

16

17

17

19-Jun-13

33

19-Jun-13

13:20

16

18

19

20-Jun-13

31

20-Jun-13

09:58

24

27

29

21-Jun-13

21

21-Jun-13

10:24

17