Job No.: TCS00670/13

 

 

 

 

 

 

 

 

 

Agreement No. CE 45/2008 (CE)

Liantang/Heung Yuen Wai

Boundary Control Point and Associated Works

 

 

 

 

 

 

 

 

 

Monthly Environmental Monitoring and Audit Report (No.26) ¡V September 2015

 

 

 

 

 

 

 

 

Prepared For

 

 

 

 

Civil Engineering and Development Department (CEDD)

 

 

 

 

 

 

 

 

 

 

 

Date

Reference No.

Prepared By

Certified By

14 October 2015

TCS00670/13/600/R0513v2

Nicola Hon

(Environmental Consultant)

Tam Tak Wing

(Environmental Team Leader)

 

Version

Date

Remarks

1

12 October 2015

First Submission

2

14 October 2015

Amended against the IEC¡¦s comments on 13 October 2015

 

 

 

 

 

 


executive summary

ES01            This is the 26th monthly EM&A report presenting the monitoring results and inspection findings for the reporting period from 1 to 30 September 2015 (hereinafter ¡¥the Reporting Period¡¦).

 

Environmental Monitoring and Audit Activities

ES02            To facilitate the project management and implementation, Liantang/Heung Yuen Wai Boundary Control Point and Associated Works of the Project is divided to six CEDD contracts including Contract 2 (CV/2012/08), Contract 3 (CV/2012/09), Contract 4 (TCSS), Contract 5 (CV/2013/03), Contract 6 (CV/2013/08) and Contract 7 (NE/2014/03) and one ArshSD contract (Contract SS C505).

 

ES03            In the Reporting Period, the construction works for Contract SS C505 was commenced on 1 September 2015 and therefore the active contracts would be included Contract 2, Contract 3, Contract 5 and Contract SS C505.  Environmental monitoring activities under the EM&A programme in the Reporting Period are summarized in the following table.

 

Environmental Aspect

Environmental Monitoring Parameters / Inspection

Reporting Period

Number of Monitoring Locations to undertake

Total Occasions  

Air Quality

1-hour TSP

6

102

24-hour TSP

6

36

Construction Noise

Leq(30min) Daytime

8

45

Water Quality

Water sampling

3 (Contract 2&3)

12(*)

2 (Contract 5 and SS C505)

12(*)

Joint Site Inspection / Audit

IEC, ET, the Contractor and RE joint site Environmental Inspection and Auditing

Contract 2

4

Contract 3

4

Contract 5

5

Contract SS C505

5

(*) Monitoring day

 

Breach of Action and Limit (A/L) Levels

1.1.1                 In the Reporting Period, no air quality and noise exceedance was registered for the Project.  For water quality, total of eight (8) Action/ Limit Level exceedances, namely two (2) Action Level exceedances of turbidity and three (3) exceedances Action/ Limit Level of suspended solids recorded at WM1 and two (2) exceedances of turbidity and one (1) exceedance of suspended solids recorded at WM4. The summary of exceedance in the Reporting Period is shown below.

 

Environmental Aspect

Monitoring Parameters

Action Level

Limit Level

Event & Action

NOE Issued

Investigation Result

Corrective Actions

Air Quality

1-hour TSP

0

0

0

--

--

24-hour TSP

0

0

0

--

--

Construction Noise

Leq(30min) Daytime

0

0

0

--

--

Water Quality

DO

0

0

0

--

--

Turbidity

2

2

4

-          The exceedances are under investigation

N/A

SS

2

2

4

 

 

Environmental Complaint

ES04            In this Reporting Period, no environmental complaints were received related to the EM&A programme.

 

Notification of Summons and Successful Prosecutions

ES05            No environmental summons or successful prosecutions were recorded in the Reporting Period.

 

Reporting Change

ES06            No reporting changes were made in the Reporting Period.

 

Site Inspection

ES07            In this Reporting Period, joint site inspection to evaluate the site environmental performance at Contract 2 has been carried out by the RE, IEC, ET and the Contractor on 4, 11, 18 and 25 September 2015.  No non-compliance was noted.

 

ES08            In the Reporting Period, joint site inspection to evaluate the site environmental performance at Contract 3 has been carried out by the RE, IEC, ET and the Contractor on 7, 16, 21 and 29 September 2015.  No non-compliance was noted.

 

ES09            In the Reporting Period, joint site inspection to evaluate the site environmental performance at Contract 5 has been carried out by the RE, IEC, ET and the Contractor on 2, 10, 17, 24 and 30 September 2015.  No non-compliance was noted.

 

ES10            In the Reporting Period, joint site inspection to evaluate the site environmental performance at Contract SS C505 has been carried out by the RE, IEC, ET and the Contractor on 2, 9, 16, 23 and 30 September 2015.  No non-compliance was noted.

 

Future Key Issues

ES11            As dry season is approaching, special attention should be paid on the potential construction dust impact since most of the construction sites are adjacent to villages. The Contractor should fully implement the construction dust mitigation measures properly.

 

ES12            The Contractor was also reminded to prevent muddy water or other water pollutants from site surface flow to local stream such as Kong Yiu Channel and Ma Wat Channel or public area.  Water quality mitigation measures to prevent surface runoff into nearby water bodies or public areas should paid attention and fully implemented.  

 

ES13            Construction noise would be a key environmental issue during construction work of the Project.  Noise mitigation measures such as using quiet plants should be implemented in accordance with the EM&A requirement.

 

ES14            Since most of construction sites under the Project are located adjacent to villages, the Contractors should fully implement air quality mitigation measures to reduce construction dust emission.

 

 


Table of Contents

1     Introduction   1

1.1            Project Background   1

1.2            Report Structure  1

2     Project Organization and Construction progress  3

2.1            Construction Contract Packaging   3

2.2            Project Organization   4

2.3            Concurrent Projects  7

2.4            Construction Progress  7

2.5            Summary of Environmental Submissions  9

3     Summary of Impact Monitoring Requirements  12

3.1            General  12

3.2            Monitoring Parameters  12

3.3            Monitoring Locations  12

3.4            Monitoring Frequency and Period   14

3.5            Monitoring Equipment  14

3.6            Monitoring Methodology   17

3.7            Equipment Calibration   19

3.8            Derivation of Action/Limit (A/L) Levels  19

3.9            Data Management and Data QA/QC Control  20

4     Air Quality Monitoring   21

4.1            General  21

4.2            Air Quality Monitoring Results in Reporting Month   21

5     Construction Noise Monitoring   23

5.1            General  23

5.2            Noise Monitoring Results in Reporting Month   23

6     Water Quality Monitoring   24

6.1            General  24

6.2            Results of Water Quality Monitoring   24

7     Waste Management   28

7.1            General Waste Management  28

7.2            Records of Waste Quantities  28

8     Site Inspection   29

8.1            requirements  29

8.2            Findings / Deficiencies During the Reporting Month   29

9     Environmental Complaint and Non-Compliance   32

9.1            Environmental Complaint, Summons and Prosecution   32

10   Implementation Status of Mitigation Measures  34

10.1          General Requirements  34

10.2          Tentative Construction Activities in the Coming Month   34

10.3          Key Issues for the Coming Month   35

11   Conclusions and Recommendations  37

11.1          Conclusions  37

11.2          Recommendations  37

 


List of TABLES

Table 2-1        Status of Environmental Licenses and Permits of the Contracts

Table 3-1        Summary of EM&A Requirements

Table 3-2        Impact Monitoring Stations - Air Quality

Table 3-3        Impact Monitoring Stations - Construction Noise

Table 3-4        Impact Monitoring Stations - Water Quality

Table 3-5        Air Quality Monitoring Equipment

Table 3-6        Construction Noise Monitoring Equipment

Table 3-7        Water Quality Monitoring Equipment

Table 3-8        Action and Limit Levels for Air Quality Monitoring

Table 3-9        Action and Limit Levels for Construction Noise

Table 3-10      Action and Limit Levels for Water Quality

Table 4-1        Summary of 24-hour and 1-hour TSP Monitoring Results ¡V AM1a

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

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

Table 4-4        Summary of 24-hour and 1-hour TSP Monitoring Results ¡V AM7a

Table 4-5        Summary of 24-hour and 1-hour TSP Monitoring Results ¡V AM8

Table 4-6        Summary of 24-hour and 1-hour TSP Monitoring Results ¡V AM9b

Table 5-1        Summary of Construction Noise Monitoring Results 

Table 6-1        Summary of Water Quality Monitoring Results for Contract 3

Table 6-2        Summary of Water Quality Monitoring Results for Contract 5

Table 6-3        Breaches of Water Quality Monitoring Criteria in Reporting Period

Table 7-1        Summary of Quantities of Inert C&D Materials

Table 7-2        Summary of Quantities of C&D Wastes

Table 8-1        Site Observations for Contract 2

Table 8-2        Site Observations for Contract 3

Table 8-3        Site Observations for Contract 5

Table 8-4        Site Observations for Contract SS C505

Table 9-1        Statistical Summary of Environmental Complaints

Table 9-2        Statistical Summary of Environmental Summons

Table 9-3        Statistical Summary of Environmental Prosecution

Table 10-1      Environmental Mitigation Measures

 

List of Appendices

Appendix A    Layout Plan of the Project

Appendix B    Organization Chart

Appendix C    3-month rolling construction program

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

Appendix E    Monitoring Locations for Impact Monitoring

Appendix F     Calibration Certificate of Monitoring Equipment and HOKLAS-accreditation Certificate of the Testing Laboratory

Appendix G    Event and Action Plan

Appendix H    Impact Monitoring Schedule

Appendix I     Database of Monitoring Result

Appendix J     Graphical Plots for Monitoring Result

Appendix K    Meteorological Data

Appendix L    Waste Flow Table

Appendix M   Implementation Schedule for Environmental Mitigation Measures

 

 

 

 


1                    Introduction

1.1              Project Background

1.1.1                 Civil Engineering and Development Department 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, which is a Designated Project to be implemented under Environmental Permit number EP-404/2011/C granted on 12 March 2015. 

 

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 ¡V this section comprises at-grade and viaducts and includes the improvement works at Lin Ma Hang Road;

2)             Ping Yeung to Wo Keng Shan ¡V 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 ¡V 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 ¡V 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 ¡V 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 ¡V this section comprises the at-grade, viaducts and interchange connection to the existing Fanling Highway.

 

1.1.4                 Action-United Environmental Services & Consulting has been commissioned as an Independent 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, the baseline monitoring has carried out between 13 June 2013 and 12 July 2013 for all parameters including air quality, noise and water quality before construction work commencement.  The Baseline Monitoring Report summarized the key findings and the rationale behind determining a set of Action and Limit Levels (A/L Levels) from the baseline data.  Also, the Project baseline monitoring report which verified by the IEC has been submitted to EPD on 16 July 2013 for endorsement.  The major construction works of the Project was commenced on 16 August 2013 in accordance with the EP Section 5.3 stipulation.

 

1.1.5                 This is 26th monthly EM&A report presenting the monitoring results and inspection findings for reporting period from 1 to 30 September 2015.

 

1.2              Report Structure

1.2.1                 The Monthly Environmental Monitoring and Audit (EM&A) Report is structured into the following sections:-

Section 1     Introduction

Section 2     Project Organization and Construction Progress

Section 3     Summary of Impact Monitoring Requirements

Section 4     Air Quality Monitoring

Section 5     Construction Noise Monitoring

Section 6     Water Quality Monitoring

Section 7     Waste Management

Section 8     Site Inspections

Section 9     Environmental Complaints and Non-Compliance

Section 10   Implementation Status of Mitigation Measures

Section 11   Conclusions and Recommendations

 

 

 


2                    Project Organization and Construction progress

2.1              Construction Contract Packaging

2.1.1                 To facilitate the project management and implementation, the Project would be divided by the following contracts:

¡P              Contract 2 (CV/2012/08)

¡P              Contract 3 (CV/2012/09)

¡P              Contract 4 (NE/2014/02)

¡P              Contract 5 (CV/2013/03)

¡P              Contract 6 (CV/2013/08)

¡P              Contract 7 (NE/2014/03)

¡P              ArchSD Contract No. SS C505

 

2.1.2                 The details of each contracts is summarized below and the delineation of each contracts is shown in Appendix A.

 

Contract 2 (CV/2012/08)

2.1.3                 Contract 2 has awarded in December 2013 and construction work was commenced on 19 May 2014.  Major Scope of Work of the Contract 2 is listed below:

¡P                construction of an approximately 5.2km long dual two-lane connecting road (with about 0.4km of at-grade road and 4.8km of tunnel) connecting the Fanling Interchange with the proposed Sha Tau Kok Interchange;

¡P                construction of a ventilation adit tunnel and the mid-ventilation building;

¡P                construction of the north and south portal buildings of the Lung Shan Tunnel and their associated slope works;

¡P                provision and installation of ventilation system, E&M works and building services works for Lung Shan tunnel and Cheung Shan tunnel and their portal buildings;

¡P                construction of Tunnel Administration Building adjacent to Wo Keng Shan Road and the associated E&M and building services works; and

¡P                construction of associated footpath, slopes, retaining structures, drainage, sewerage, waterworks, landscaping works and other ancillary works.

 

Contract 3 (CV/2012/09)

2.1.4                 Contract 3 was awarded in July 2013 and construction work was commenced on 5 November 2013.  Major Scope of Work of the Contract 3 is listed below:

¡P                construction of four link roads connecting the existing Fanling Highway and the south portal of the Lung Shan Tunnel;

¡P                realignment of the existing Tai Wo Service Road West and Tai Wo Service Road East;

¡P                widening of the existing Fanling Highway (HyD¡¦s entrustment works);

¡P                demolishing existing Kiu Tau vehicular bridge and Kiu Tau footbridge and reconstruction of the existing Kiu Tau Footbridge (HyD¡¦s entrustment works); and

¡P                construction of associated footpath, slopes, retaining structures, drainage, sewerage, waterworks, landscaping works and other ancillary works.

 

Contract 4 (NE/2014/02)

2.1.5                 Contract 4 has not yet been awarded.  The work of the Contract 4 includes provision and installation of Traffic Control and Surveillance System and the associated electrical and mechanical works for the Project.

 

Contract 5 (CV/2013/03)

2.1.6                 Contract 5 has awarded in April 2013 and construction work was commenced in August 2013.  Major Scope of Work of the Contract 5 is listed below:

¡P                site formation of about 23 hectares of land for the development of the BCP;

¡P                construction of an approximately 1.6 km long perimeter road at the BCP including a 175m long depressed road;

¡P                associated diversion/modification works at existing local roads and junctions including Lin Ma Hang Road;

¡P                construction of pedestrian subway linking the BCP to Lin Ma Hang Road;

¡P                provision of resite area with supporting infrastructure for reprovisioning of the affected village houses; and

¡P                construction of associated footpath, slopes, retaining structures, drainage, sewerage, waterworks, landscaping works and other ancillary works.

 

Contract 6 (CV/2013/08)

2.1.7                 Contract 6 has awarded in June 2015 and construction work was expected to be commenced on 23 October 2015.  Major Scope of Work of the Contract 6 would be included below:

Ÿ    construction of an approximately 4.6km long dual two-lane connecting road (with about 0.6km of at-grade road, 3.3km of viaduct and 0.7km of tunnel) connecting the BCP with the proposed Sha Tau Kok Road Interchange and the associated ventilation buildings;

Ÿ    associated diversion/modification works at access roads to the resite of Chuk Yuen Village;

Ÿ    provision of sewage collection, treatment and disposal facilities for the BCP and the resite of Chuk Yuen Village;

Ÿ    construction of a pedestrian subway linking the BCP to Lin Ma Hang Road;

Ÿ    provisioning of the affected facilities including Wo Keng Shan Road garden; and

Ÿ    construction of associated footpath, slopes, retaining structures, drainage, sewerage, waterworks, landscaping works and other ancillary works.

 

Contract 7 (NE/2014/03)

2.1.8                 Contract 7 has not yet been awarded.  Major Scope of Work of the Contract 7 would be included below:

Ÿ    construction of the Hong Kong Special Administrative Region (HKSAR) portion of four vehicular bridge

Ÿ    construction of one pedestrian bridge crossing Shenzhen (SZ) River (cross boundary bridges)

 

ArchSD Contract No. SS C505

2.1.9                 SS C505 has been awarded in July 2015 and construction work was commenced on 1 September 2015.  Major Scope of Work of the SS C505 would be included below:

Ÿ    passenger-related facilities including processing kiosks and examination facilities for private cars and coaches, passenger clearance building and halls, the interior fitting works for the pedestrian bridge crossing Shenzhen River, etc.;

Ÿ    cargo processing facilities including kiosks for clearance of goods vehicles, customs inspection platforms, X-ray building, etc.;

Ÿ    accommodation for the facilities inside of the Government departments providing services in connection with the BCP;

Ÿ    transport-related facilities inside the BCP including road networks, public transport interchange, transport drop-off and pick-up areas, vehicle holding areas and associated road furniture etc;

Ÿ    a public carpark; and

Ÿ    other ancillary facilities such as sewerage and drainage, building services provisions and electronic systems, associated environmental mitigation measure and landscape works.

 

2.2              Project Organization

2.2.1                 The project organization is shown in Appendix B.  The responsibilities of respective parties are:

 

Civil Engineering and Development Department (CEDD)

2.2.2                 CEDD is the Project Proponent and the Permit Holder of the EP of the development of the Project and will assume overall responsibility for the project. An Independent Environmental Checker (IEC) shall be employed by CEDD to audit the results of the EM&A works carried out by the ET.

 

Architectural Services Department (ArchSD)

2.2.3                 ArchSD acts as the works agent for Development Bureau (DEVB), for Contract SS C505 Liantang/ Heung Yuen Wai Boundary Control Point (BCP) ¡V BCP Buildings and Associated Facilities.

 

Environmental Protection Department (EPD)

2.2.4                 EPD is the statutory enforcement body for environmental protection matters in Hong Kong.

 

Ronald Lu & Partners (Hong Kong) Ltd (The Architect)

2.2.5                 Ronald Lu & Partners (Hong Kong) Ltd is appointed by ArchSD as an Architect for Contract SS C505 Liantang/ Heung Yuen Wai Boundary Control Point (BCP) ¡V BCP Buildings and Associated Facilities.  It responsible for overseeing the construction works of Contract SS C505 and for ensuring that the works are undertaken by the Contractor in accordance with the specification and contract requirements. The duties and responsibilities of the Architect with respect to EM&A are:

Ÿ    Monitor the Contractors¡¦ compliance with contract specifications, including the implementation and operation of the environmental mitigation measures and their effectiveness

Ÿ    Monitor Contractors¡¦ and ET¡¦s compliance with the requirements in the Environmental Permit (EP) and EM&A Manual

Ÿ    Facilitate ET¡¦s implementation of the EM&A programme

Ÿ    Participate in joint site inspection by the ET and IEC

Ÿ    Oversee the implementation of the agreed Event / Action Plan in the event of any exceedance

Ÿ    Adhere to the procedures for carrying out complaint investigation

Ÿ    Liaison with DSD, Engineer/Engineer¡¦s Representative, ET, IEC and the Contractor of the ¡§Construction of the DSD¡¦s Regulation of Shenzhen River Stage 4 (RSR 4)¡¨ Project discussing regarding the cumulative impact issues.

 

Engineer or Engineers Representative (ER)

2.2.6                 The ER is responsible for overseeing the construction works and for ensuring that the works are undertaken by the Contractor in accordance with the specification and contract requirements. The duties and responsibilities of the ER with respect to EM&A are:

¡P           Monitor the Contractors¡¦ compliance with contract specifications, including the implementation and operation of the environmental mitigation measures and their effectiveness

¡P           Monitor Contractors¡¦s, ET¡¦s and IEC¡¦s compliance with the requirements in the Environmental Permit (EP) and EM&A Manual

¡P           Facilitate ET¡¦s implementation of the EM&A programme

¡P           Participate in joint site inspection by the ET and IEC

¡P           Oversee the implementation of the agreed Event / Action Plan in the event of any exceedance

¡P           Adhere to the procedures for carrying out complaint investigation

¡P           Liaison with DSD, Engineer/Engineer¡¦s Representative, ET, IEC and the Contractor of the ¡§Construction of the DSD¡¦s Regulaiton of Shenzhen River Stage 4 (RSR 4)¡¨ Project discussing regarding the cumulative impact issues.

 

The Contractor(s)

2.2.7                 There will be one contractor for each individual works contract. Once the contractors are appointed, EPD, ET and IEC will be notified the details of the contractor.

2.2.8                 The Contractor for Contracts under CEDD should report to the ER. For ArchSD Contract, the Contractor should report to the Architect or Architect¡¦s Representative (AR). The duties and responsibilities of the Contractor are:

¡P           Comply with the relevant contract conditions and specifications on environmental protection

¡P           Employ an Environmental Team (ET) to undertake monitoring, laboratory analysis and reporting of EM &A Facilitate ET¡¦s monitoring and site inspection activities

¡P           Participate in the site inspections by the ET and IEC, and undertake any corrective actions

¡P           Provide information / advice to the ET regarding works programme and activities which may contribute to the generation of adverse environmental impacts

¡P           Submit proposals on mitigation measures in case of exceedances of Action and Limit levels in accordance with the Event / Action Plans

¡P           Implement measures to reduce impact where Action and Limit levels are exceeded

¡P           Adhere to the procedures for carrying out complaint investigation

 

Environmental Team (ET)

2.2.9                 Once the ET is appointed, the EPD, CEDD, ER, Architect and IEC will be notified the details of the ET.

 

2.2.10             The ET shall not be in any way an associated body of the Contractor(s), and shall be employed by the Project Proponent/Contractor to conduct the EM&A programme.  The ET should be managed by the ET Leader. The ET Leader shall be a person who has at least 7 years¡¦ experience in EM&A and has relevant professional qualifications. Suitably qualified staff should be included in the ET, and resources for the implementation of the EM&A programme should be allocated in time under the Contract(s), to enable fulfillment of the Project¡¦s EM&A requirements as specified in the EM&A Manual during construction of the Project.  The ET shall report to the Project Proponent and the duties shall include:

¡P           Monitor and audit various environmental parameters as required in this EM&A Manual

¡P           Analyse the environmental monitoring and audit data, review the success of EM&A programme and the adequacy of mitigation measures implemented, confirm the validity of the EIA predictions and identify any adverse environmental impacts arising

¡P           Carry out regular site inspection to investigate and audit the Contractors¡¦ site practice, equipment/plant and work methodologies with respect to pollution control and environmental mitigation, and effect proactive action to pre-empt problems

¡P           Monitor compliance with conditions in the EP, environmental protection, pollution prevention and control regulations and contract specifications

¡P           Audit environmental conditions on site

¡P           Report on the environmental monitoring and audit results to EPD, the ER, the Architect, the lEC and Contractor or their delegated representatives

¡P           Recommend suitable mitigation measures to the Contractor in the case of exceedance of Action and Limit levels in accordance with the Event and Action Plans

¡P           Liaise with the IEC on all environmental performance matters and timely submit all relevant EM&A proforma for approval by IEC

¡P           Advise the Contractor(s) on environmental improvement, awareness, enhancement measures etc., on site

¡P           Adhere to the procedures for carrying out complaint investigation

¡P           Liaison with the client departments, Engineer/Engineer¡¦s Representative, ET, lEC and the Contractor(s) of the concurrent projects as listed under Section 2.3 below regarding the cumulative impact issues.

 

Independent Environmental Checker (IEC)

2.2.11             One IEC will be employed for this Project. Once the IEC is appointed, EPD, ER, the Architect and ET will be notified the details of the IEC.

 

2.2.12             The Independent Environmental Checker (IEC) should not be in any way an associated body of the Contractor or the ET for the Project. The IEC should be employed by the Permit Holder (i.e., CEDD) prior to the commencement of the construction of the Project. The IEC should have at least 10 years¡¦ experience in EM&A and have relevant professional qualifications. The appointment of IEC should be subject to the approval of EPD. The IEC should:

¡P           Provide proactive advice to the ER and the Project Proponent on EM&A matters related to the project, independent from the management of construction works, but empowered to audit the environmental performance of construction

¡P           Review and audit all aspects of the EM&A programme implemented by the ET

¡P           Review and verify the monitoring data and all submissions in connection with the EP and EM&A Manual submitted by the ET

¡P           Arrange and conduct regular, at least monthly site inspections of the works during construction phase, and ad hoc inspections if significant environmental problems are identified

¡P           Check compliance with the agreed Event / Action Plan in the event of any exceedance

¡P           Check compliance with the procedures for carrying out complaint investigation

¡P           Check the effectiveness of corrective measures

¡P           Feedback audit results to ET by signing off relevant EM&A proforma

¡P           Check that the mitigation measures are effectively implemented

¡P           Verify the log-book(s) mentioned in Condition 2.2 of the EP, notify the Director by fax, within one working day of receipt of notification from the ET Leader of each and every occurrence, change of circumstances or non-compliance with the EIA Report and/or the EP, which might affect the monitoring or control of adverse environmental impacts from the Project

¡P           Report the works conducted, the findings, recommendation and improvement of the site inspections, after reviewing ET¡¦s and Contractor¡¦s works, and advices to the ER and Project Proponent on a monthly basis

¡P           Liaison with the client departments, Engineer/Engineer¡¦s Representative, the Architect, ET, lEC and the Contractor of the concurrent projects as listed under Section 2.3 below regarding the cumulative impact issues.

 

2.3              Concurrent Projects

2.3.1                 The concurrent construction works that may be carried out include, but not limited to, the following:

                                (a)            Regulation of Shenzhen River Stage IV;

                                (b)            Widening of Fanling Highway ¡V Tai Hang to Wo Hop Shek Interchange ¡V Contract No. HY/2012/06;

                                (c)            Construction of BCP facilities in Shenzhen.

 

2.4              Construction Progress

2.4.1                 In the Reporting Period, the major construction activity conducted under the Project is located in Contracts 2, 3, 5 and SS C505 and they are summarized in below.  Moreover, the 3-month rolling construction program of the Contracts 2, 3, 5 and SS C505 is enclosed in Appendix C.

 

Contract 2 (CV/2012/08)

2.4.2                 The contract commenced in May 2014. In this Reporting Period, construction activities conducted are listed below:

Mid-Vent Portal

Ÿ    Cavern excavation

Ÿ    Adit invert slab

Ÿ    Ventilation Building Foundation Work

North Portal

Ÿ    Permanent slope and composite wall

Ÿ    Tunnel Boring Machine (TBM) testing

Ÿ    Southbound bench excavation and Northbound top heading excavation

Ÿ    Associated PME installation for operation of TBM (mortar plant, cooling system etc.)

South Portal

Ÿ    Rock Excavation to Vent. Bldg. Formation

Ÿ    Southbound excavation and foundation works

Ÿ    Northbound excavation and bored piles works

 

Ÿ    Drill and Blast Set Up

Ÿ    Installation of blast door for Southbound tunnel

Admin Building

Ÿ    Removal of surcharge

Ÿ    Drainage works

 

Contract 3 (CV/2012/09)

2.4.3                 The Contract commenced in November 2013.  In this Reporting Period, construction activities conducted are listed below:

Ÿ   Cable detection and trial trenches

Ÿ   Decking construction for Bridge E

Ÿ   E&M work for new valve control & Telemetry House

Ÿ   Filling works at Tong Hang

Ÿ   Storm drain laying

Ÿ   Noise barrier construction

Ÿ   Pier / pier table construction

Ÿ   Pile cap works

Ÿ   Piling works

Ÿ   Portal beam erection

Ÿ   Pre-drilling

Ÿ   Road works at Fanling Highway

Ÿ   Retaining Wall construction

Ÿ   Socket H-pile installation

Ÿ   Tree felling works

Ÿ   Utilities duct laying

Ÿ   Viaduct segment erection

Ÿ   Portal beam construction

Ÿ   Slope works

Ÿ   Construction of temporary steel ramp for Kiu Tau Footbridge

 

Contract 4 (Contract number to be assigned)

2.4.4                 The contract has not yet been awarded.

 

Contract 5 (CV/2013/03)

2.4.5                 The Contract awarded in April 2013 and commenced on August 2013.  In this Reporting Period, construction activities conducted are listed below:

Ÿ   Removal of abortive rising mains at existing Lin Ma Hang (LMH) Road

Ÿ   Re-construction of rising main at existing LMH Road

Ÿ   Diversion of Underground Utility (UU) at existing LMH Road

Ÿ   Construction of secondary boundary fencing

Ÿ   Construction of Temporary Secondary Boundary Fencing

Ÿ   Construction of Depressed Road at BCP3

Ÿ   Additional works (Access Works) for Village House at RS4

Ÿ   Drainage works at existing/proposed LMH Road

Ÿ   Drainage works (Connection to Box 3) at BCP Area

Ÿ   Brick laying at footpath of proposed LMH road

Ÿ   Irrigation at proposed LMH Road

Ÿ   Formation works at BCPB Area

Ÿ   Installation of Underground utilities at proposed and existing LMH road

Ÿ   Road works (kerb laying) for proposed and existing LMH road

Ÿ   Bituminous laying at existing & proposed LMH road

 

Contract 6 (CV/2013/08)

2.4.6                 Contract 6 has awarded in June 2015 and construction work was expected to be commenced on 1 November 2015.

 

Contract 7 (NE/2014/03)

2.4.7                 Contract 7 has not yet awarded.

 

Contract SS C505

2.4.8                 Contract SS C505 has awarded in July 2015 and construction work was commenced on 1 September 2015.  In this Reporting Period, construction activities conducted are listed below:

Ÿ   Excavation & fill works

Ÿ   Predrilling

Ÿ   Percussive piling

Ÿ   Site office set-up

 

2.5              Summary of Environmental Submissions

2.5.1                 In according to the EP, the required documents have submitted to EPD for retention which listed in below:

Ÿ   Project Layout Plans of Contracts 2, 3, 5, 6 and SS C505

Ÿ   Landscape Plan

Ÿ   Topsoil Management Plan

Ÿ   Environmental Monitoring and Audit Programme

Ÿ   Baseline Monitoring Report (TCS00690/13/600/R0030v3) for the Project

Ÿ   Waste Management Plan of the Contracts 2, 3, 5 and SS C505

Ÿ   Contamination Assessment Plan (CAP) for Po Kat Tsai, Loi Tung and the workshops in Fanling

Ÿ   Contamination Assessment Report (CAR) for Po Kat Tsai, Loi Tung and the workshops in Fanling

Ÿ   Vegetation Survey Report

Ÿ   Woodland Compensation Plan

Ÿ   Habitat Creation Management Plan

 

2.5.2                 Summary of the relevant permits, licenses, and/or notifications on environmental protection for the Project of each contracts are presented in Table 2-1.

Table 2-1    Status of Environmental Licenses and Permits of the Contracts

Item

Description

License/Permit Status

Ref. no.

Effective Date

Expiry Date

Contract 2

1

Air pollution Control (Construction Dust) Regulation

Ref No.: 368864

31 Dec 2013

Till Contract ends

2

Chemical Waste Producer Registration

North Portal

Waste Producers Number: No.5213-652-D2523-01

25 Mar 2014

Till Contract ends

Mid-Vent Portal

Waste Producers Number: No.5213-634-D2524-01

25 Mar 2014

Till Contract ends

South Portal

Waste Producers Number: No.5213-634-D2526-01

9 Apr 2014

Till Contract ends

3

Water Pollution Control Ordinance - Discharge License

No.WT00018374-2014

3 Mar 2014

28 Feb 2019

No.: W5/1I389

28 Mar 2014

31 Mar 2019

No.: W5/1I390

19 June 2014

31 Mar 2019

No.: W5/1I391

28 Mar 2014

31 Mar 2019

No.: W5/1I392

28 Mar 2014

31 Mar 2019

4

Waste Disposal Regulation - Billing Account for Disposal of Construction Waste

Account No. 7019105

8 Jan 2014

Till Contract ends

5

Construction Noise Permit

GW-RN0304-15

19 May 2015

14 Nov 2015

GW-RN0468-15

29 Aug 2015

28 Nov 2015

GW-RN0467-15

23 Aug 2015

22 Nov 2015

GW-RN0477-15

14 Aug 2015

31 Oct 2015

GW-RN0479-15

31 Jul 2015

29 Jan 2016

GW-RN0562-15

7 Sep 2015

6 Dec 2015

GW-RN0606-15

25 Sep 2015

24 Nov 2015

Contract 3

1

Air pollution Control (Construction Dust) Regulation

Ref. No: 362101

17 Jul 2013

Till Contract ends

2

Chemical Waste Producer Registration

Waste Producers Number: No.:5113-634-C3817-01

 

7 Oct 2013

Till Contract ends

3

Water Pollution Control Ordinance - Discharge License

No.:WT00016832 ¡V 2013

28 Aug 13

31 Aug 2018

4

Waste Disposal Regulation - Billing Account for Disposal of Construction Waste

Account No. 7017914

2 Aug 13

Till Contract ends

5

Construction Noise Permit

GW-RN0230-15

15 Apr 2015

14 Oct 2015

GW-RN0334-15

8 Jun 2015

7 Dec 2015

GW-RN0428-15

9 Ju1 2015

31 Dec 2015

GW-RN0466-15

3 Aug 2015

30 Sep 2015

GW-RN0492-15

11 Aug 2015

30 Sep 2015

GW-RN0473-15

29 Jul 2015

17 Dec 2015

GW-RN0461-15

5 Aug 2015

8 Jan 2016

GW-RN0495-15

12 Aug 2015

11 Feb 2016

GW-RN0497-15

14 Aug 2015

13 Feb 2016

GW-RN0488-15

6 Sep 2015

22 Nov 2015

GW-RN0525-15

29 Aug 2015

13 Feb 2016

GW-RN0542-15

1 Sep 2015

25 Feb 2016

GW-RN0548-15

1 Sep 2015

30 Sep 2015

GW-RN0608-15

28 Sep 2015

29 Feb 2016

Contract 5

1

Air pollution Control (Construction Dust) Regulation

Ref. No: 359338

13 May 2013

Till the end of Contract

2

Chemical Waste Producer Registration

Waste Producers Number No.: 5213-642-S3735-01

8 Jun 2013

Till the end of Contract

3

Water Pollution Control Ordinance - Discharge License

No.: W5/1G44/1

8 Jun 13

30 Jun 2018

4

Waste Disposal Regulation - Billing Account for Disposal of Construction Waste

Account No. 7017351

29 Apr 13

Till the end of Contract

Contract SS C505

1

Air pollution Control (Construction Dust) Regulation

Ref. No: 390974

13 Jul 2015

Till the end of Contract

2

Chemical Waste Producer Registration

Waste Producer No.: 5213-642-L1048-07

16 Sep 2015

Till the end of Contract

3

Water Pollution Control Ordinance - Discharge License

In progress

4

Waste Disposal Regulation - Billing Account for Disposal of Construction Waste

Account No. 7022831

23 Jul 2015

Till the end of Contract

5

Construction Noise Permit

GW-RN0518-15

22 Aug 2015

22 Sep 2015

GW-RN0602-15

23 Sep 2015

21 Mar 2016

PP-RN0023-15

28 Aug 2015

5 Oct 2015

PP-RN0027-15

5 Oct 2015

2 Apr 2016

 


3                    Summary of Impact Monitoring Requirements

3.1              General

3.1.1                 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.

 

3.1.2                 A summary of construction phase EM&A requirements are presented in the sub-sections below.

 

3.2              Monitoring Parameters

3.2.1                 The EM&A program of construction phase monitoring shall cover the following environmental issues:

                     Air quality;

                     Construction noise; and

                     Water quality

 

3.2.2                 A summary of the monitoring parameters is presented in Table 3-1.

Table 3-1         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

Ÿ  Supplementary information for data auditing, statistical results such as L10 and L90 shall also be obtained for reference.

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 (¢J).

Laboratory Analysis

Ÿ  Suspended Solids (mg/L)

 

3.3              Monitoring Locations

3.3.1                 The designated monitoring locations as recommended in the EM&A Manual are shown in Appendix D.  As the access to some of the designated monitoring locations was questionable due to safety reason or denied by the landlords, alternative locations therefore have had proposed. The proposed alternative monitoring locations has updated in the revised EM&A Programme which verified by IEC and certified by ET Leader prior submitted to EPD on 10 July 2013.  Table 3-2, Table 3-3 and Table 3-4 are respectively listed the air quality, construction noise and water quality monitoring locations for the Project and a map showing these monitoring stations is presented in Appendix E.

Table 3-2        Impact Monitoring Stations - Air Quality

Station ID

Description

Works Area

Related to the Work Contract

AM1a*

Garden Farm, Tsung Yuen Ha Village

BCP

ArchSD SS C505

Contract 5

AM2

Village House near Lin Ma Hang Road

LMH to Frontier Closed Area

Contract 5,

Contract 6

AM3

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

LMH to Frontier Closed Area

Contract 5,

Contract 6

AM4a

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

LMH to Frontier Closed Area

Contract 6

AM5

Ping Yeung Village House

Ping Yeung to Wo Keng Shan

Contract 6

AM6

Wo Keng Shan Village House

Ping Yeung to Wo Keng Shan

Contract 6

AM7b@

Loi Tung Village House

Sha Tau Kok Road

Contract 2

Contract 6

AM8

Po Kat Tsai Village No. 4

Po Kat Tsai

Contract 2

AM9b#

Nam Wa Po Village House No. 80

Fanling

Contract 3

# Proposal for the change of air quality monitoring location from AM9a to AM9b was submitted to EPD on 4 Nov 2013 after verified by the IEC and it was approved by EPD (EPD¡¦s ref.: (15) in EP 2/N7/A/52 Pt.10 dated 8 Nov 2013).

* Proposal for the change of air quality monitoring location from AM1to AM1a was submitted to EPD on 24 March 2014 after verified by the IEC. It was approved by EPD (EPD¡¦s ref.: (6) in EP 2/N7/A/52 Pt.12 dated 9 Jun 2014).

@ Proposal for the change of air quality monitoring location from AM7a to AM7b was submitted to EPD on 4 June 2014 after verified by the IEC. It was approved by EPD (EPD¡¦s ref.: (7) in EP 2/N7/A/52 Pt.12 dated 9 Jun 2014).

 

Table 3-3        Impact Monitoring Stations - Construction Noise

Station ID

Description

Works Area

Related to the Work Contract

NM1

Tsung Yuen Ha Village House No. 63

BCP

ArchSD SS C505

Contract 5

NM2

Village House near Lin Ma Hang Road

Lin Ma Hang to Frontier Closed Area

Contract 5,

Contract 6

NM3

Ping Yeung Village House (facade facing northeast)

Ping Yeung to Wo Keng Shan

Contract 6

NM4

Wo Keng Shan Village House

Ping Yeung to Wo Keng Shan

Contract 6

NM5

Village House, Loi Tung

Sha Tau Kok Road

Contract 2,

Contract 6

NM6

Tai Tong Wu Village House 2

Sha Tau Kok Road

Contract 2,

Contract 6

NM7

Po Kat Tsai Village

Po Kat Tsai

Contract 2

NM8

Village House, Tong Hang

Fanling

Contract 2

Contract 3

NM9

Village House, Kiu Tau Village

Fanling

Contract 3

NM10

Nam Wa Po Village House No. 80

Fanling

Contract 3

 

Table 3-4        Impact Monitoring Stations - Water Quality

Station ID

Description

Coordinates of Designated / Alternative Location

Nature of the location

Related to the Work Contract

WM1

Downstream of Kong Yiu Channel

833 679

845 421

Alternative location located at upstream 51m of the designated location

ArchSD SS C505

Contract 5

WM1- Control

Upstream of Kong Yiu Channel

834 185

845 917

NA

ArchSD SS C505

Contract 5

WM2A

Downstream of River Ganges

834 204

844 471

Alternative location located at downstream 81m of the designated location

Contract 6

WM2A- Control

Upstream of River Ganges

835 270

844 243

Alternative location located at upstream 78m of the designated location

Contract 6

WM2B

Downstream of River Ganges

835 433

843 397

NA

Contract 6

WM2B- Control

Upstream of River Ganges

835 835

843 351

Alternative location located at downstream 31m of the designated location

Contract 6

WM3

Downstream of River Indus

836 324

842 407

NA

Contract 2

Contract 6

WM3- Control

Upstream of River Indus

836 763

842 400

Alternative location located at downstream 26m of the designated location

Contract 2

Contract 6

WM4

Downstream of Ma Wat Channel

833 850

838 338

Alternative location located at upstream 11m of the designated location

Contract 2

Contract 3

WM4¡V Control A

Kau Lung Hang Stream

834 028

837 695

Alternative location located at downstream 28m of the designated location

Contract 2

Contract 3

WM4¡V Control B

Upstream of Ma Wat Channel

833760

837395

Alternative location located at upstream 15m of the designated location

Contract 2

Contract 3

 

3.4              Monitoring Frequency and Period

The requirements of impact monitoring are stipulated in Sections 2.1.6, 3.1.5 and 4.1.6 of the approved EM&A Manual and presented as follows.

 

Air Quality Monitoring

3.4.1                 Frequency of impact air quality monitoring is as follows:

Ÿ   1-hour TSP

3 times every six days during course of works

Ÿ   24-hour TSP

Once every 6 days during course of works.

 

Noise Monitoring

3.4.2                 One set of Leq(30min) as 6 consecutive Leq(5min) between 0700-1900 hours on normal weekdays and once every week during course of works.  If construction work necessary to carry out at 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¡¨), 3 consecutive Leq(5min) measurement will depended CNP requirements to undertake.  Supplementary information for data auditing, statistical results such as L10 and L90 shall also be obtained for reference.

 

Water Quality Monitoring

3.4.3                 The water quality monitoring frequency shall be 3 days per week during course of works.  The interval between two sets of monitoring shall not be less than 36 hours.

 

3.5              Monitoring Equipment

Air Quality Monitoring

3.5.1                 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.

 

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

 

3.5.3                 All equipment to be used for air quality monitoring is listed in Table 3-5.

Table 3-5         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-5025A*

1-Hour TSP

Portable Dust Meter

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

* Instrument was used in the Reporting Period and the calibration certificate could be referred in Appendix F.

 

Wind Data Monitoring Equipment

3.5.4                 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.

 

3.5.5                 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.

 

3.5.6                 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 located at 15m above mean sea level while its anemometer is located at 13m above the existing ground which 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

3.5.7                 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.

 

3.5.8                 Noise monitoring equipment to be used for monitoring is listed in Table 3-6.

Table 3-6         Construction Noise Monitoring Equipment

Equipment

Model

Integrating Sound Level Meter

B&K Type 2238* or Rion NL-31 or Rion NL-52*

Calibrator

B&K Type 4231* or Cesva CB-5* or Rion NC-74*

Portable Wind Speed Indicator

Testo Anemometer

* Instrument was used in the Reporting Period and the calibration certificate could be referred in Appendix F.

 

3.5.9                 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 impact monitoring will be calibrated yearly.

 

Water Quality Monitoring

3.5.10             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.

 

3.5.11             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.

 

3.5.12             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.

 

3.5.13             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.

 

3.5.14             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.

 

3.5.15             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.

 

3.5.16             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.

 

3.5.17             Water quality monitoring equipment used in the impact monitoring is listed in Table 3-7.  Suspended solids (SS) analysis is carried out by a local HOKLAS-accredited laboratory, namely ALS Technichem (HK) Pty Ltd.

Table 3-7         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 Professional Plus /YSI PRO20 Handheld Dissolved Oxygen Instrument* / YSI 550A Multifunctional Meter/ YSI 6820/ 650MDS

pH meter

YSI Professional Plus / AZ8685 pH pen-style meter/ YSI 6820/ 650MDS

Turbidimeter

Hach 2100Q*/ YSI 6820/ 650MDS

Sample Container

High density polythene bottles (provided by laboratory)

Storage Container

¡¥Willow¡¦ 33-liter plastic cool box with Ice pad

* Instrument was used in the Reporting Period and the calibration certificate could be referred in Appendix F.

 

3.6              Monitoring Methodology

1-hour TSP Monitoring

3.6.1                 The 1-hour TSP monitor was a brand named ¡§Sibata LD-3B Laser Dust monitor Particle Mass Profiler & Counter¡¨ which is a portable, battery-operated laser photometer.  The 1-hour TSP meter provides a real time 1-hour TSP measurement based on 90o light scattering.  The 1-hour TSP monitor consists 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.

 

3.6.2                 The 1-hour TSP meter is used within the valid period as follow manufacturer¡¦s Operation and Service Manual.

 

24-hour TSP Monitoring

3.6.3                 The equipment used for 24-hour TSP measurement is 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

 

3.6.4                 The HVS is operated and calibrated on a regular basis in accordance with the manufacturer¡¦s instruction using Tisch Calibration Kit Model TE-5025A.  Calibration would carry out in two month interval.

 

3.6.5                 24-hour TSP is 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 keep all the sampled 24-hour TSP filters in normal air conditioned room conditions, i.e. 70% RH (Relative Humidity) and 25oC, for six months prior to disposal.

 

Noise Monitoring

3.6.6                 Noise measurements were taken in terms of the A-weighted equivalent sound pressure level (Leq) measured in decibels dB(A). Supplementary statistical results (L10 and L90) were also obtained for reference.

 

3.6.7                 During the monitoring, all noise measurements would be 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(5min) measurements will use as the monitoring parameter for the time period between 0700-1900 hours on weekdays; and also Leq(15min) in three consecutive Leq(5min) measurements would be used as monitoring parameter for other time periods (e.g. during restricted hours), if necessary.

 

3.6.8                 Prior of noise measurement, the accuracy of the sound level meter is checked using an acoustic calibrator generating a known sound pressure level at a known frequency.  The checking is performed before and after the noise measurement.

 

Water Quality

3.6.9                 Water quality monitoring is conducted at the designated locations. The sampling produce with the in-situ monitoring are presented as below:

 

Sampling Procedure

3.6.10             A Digital Global Positioning System (GPS) is used to identify the designated monitoring stations prior to water sampling.  A portable, battery-operated echo sounder is used for the determination of water depth at each station.  At each station, water sample would be collected from 0.1m below water surface or the water surface to prevent the river bed sediment for stirring.

 

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

 

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

 

3.6.13             A ¡¥Willow¡¦ 33-liter plastic cool box packed with ice will be used to preserve the water samples prior to arrival at the laboratory for chemical determination.  The water temperature of the cool box is maintained at a temperature as close to 40C as possible without being frozen.  Samples collected are delivered to the laboratory upon collection.

 

In-situ Measurement

3.6.14             YSI PRO20 Handheld Dissolved Oxygen Instrument is used for water in-situ measures, which automates the measurements and data logging of temperature, dissolved oxygen and dissolved oxygen saturation. 

 

3.6.15             A portable AZ Model 8685 pH pen-style meter is used for in-situ pH measurement.  The pH meter is capable of measuring pH in the range of 0 ¡V 14 and readable to 0.1.

 

3.6.16             A portable Hach 2100Q Turbidimeter is used for in-situ turbidity measurement. The turbidity meter is capable of measuring turbidity in the range of 0 ¡V 1000 NTU. 

 

3.6.17             All in-situ measurement equipment are calibrated by HOKLAS accredited laboratory of three month interval.

 

Laboratory Analysis

3.6.18             All water samples analyzed Suspended Solids (SS) will be carried out by a local HOKLAS-accredited testing laboratory (ALS Technichem (HK) Pty Ltd HOKLAS registration no. 66).  SS determination using APHA Standard Methods 2540D as specified in the EM&A Manual will start within 48 hours of water sample receipt.

 

3.7              Equipment Calibration

3.7.1                 Calibration of the HVS is performed upon installation and thereafter at bimonthly intervals in accordance with the manufacturer¡¦s instruction using the certified standard calibrator (TISCH Model TE-5025A).  Moreover, the Calibration Kit would be calibrated annually. The calibration data are properly documented and the records are maintained by ET for future reference.

 

3.7.2                 The 1-hour TSP meter was calibrated by the supplier prior to purchase.  Zero response of the equipment would be checked before and after each monitoring event.  Annually calibration with the High Volume Sampler (HVS) in same condition would be undertaken by the Laboratory.

 

3.7.3                 The sound level meter and calibrator are calibrated and certified by a laboratory accredited under HOKLAS or any other international accreditation scheme at yearly basis.

 

3.7.4                 All water quality monitoring equipment would be calibrated by HOKLAS accredited laboratory of three month intervals.

 

3.7.5                 The calibration certificates of all monitoring equipment used for the impact monitoring program in the Reporting Period and the HOKLAS accredited certificate of laboratory are attached in Appendix F.   

 

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

3.8.1                 The baseline results form the basis for determining the environmental acceptance criteria for the impact monitoring.  According to the approved Environmental Monitoring and Audit Manual, the air quality, construction noise and water quality criteria were set up, namely Action and Limit levels are listed in Tables 3-8, 3-9 and 3-10.

Table 3-8        Action and Limit Levels for 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

AM1a

265

143

500

260

AM2

268

149

AM3

269

145

AM4a

267

148

AM5

268

143

AM6

269

148

AM7b

275

156

AM8

269

144

AM9b

271

151

 

Table 3-9         Action and Limit Levels for Construction Noise

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 2

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 3-10       Action and Limit Levels for Water Quality

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

 

3.8.2                 Should non-compliance of the environmental quality criteria occurs, remedial actions will be triggered according to the Event and Action Plan which presented in Appendix G.

 

 

3.9              Data Management and Data QA/QC Control

3.9.1                 All monitoring data will be handled by the ET¡¦s in-house data recording and management system.  The monitoring data recorded in the equipment will be downloaded directly from the equipment at the end of each monitoring day.  The downloaded monitoring data will input into a computerized database maintained by the ET.  The laboratory results will be input directly into the computerized database and checked by personnel other than those who input the data.

 

3.9.2                 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                    Air Quality Monitoring

4.1              General

4.1.1                 In the Reporting Period, construction works under the project have been commenced in Contracts 2, 3, 5 and Contract SS C505 and air quality monitoring was performed at 6 relevant designated locations as below:

Ÿ    AM1a - Garden Farm, Tsung Yuen Ha Village;

Ÿ    AM2 - Village House near Lin Ma Hang Road;

Ÿ    AM3 - Ta Kwu Ling Fire Service Station of Ta Kwu Ling Village;

Ÿ    AM7b ¡V Loi Tung Village;

Ÿ    AM8 - Po Kat Tsai Village;

Ÿ    AM9b - Nam Wa Po Village House No. 80

 

4.1.2                 The air quality monitoring schedule is presented in Appendix H and the monitoring results are summarized in the following sub-sections.

 

4.2              Air Quality Monitoring Results in Reporting Month

4.2.1                 In the Reporting Period, a total of 102 events of 1-hour TSP and 36 events 24-hours TSP monitoring were carried out and the monitoring results are summarized in Tables 4-1 to 4-6.   The detailed 24-hour TSP monitoring data are presented in Appendix I and the relevant graphical plots are shown in Appendix J.

Table 4-1         Summary of 24-hour and 1-hour TSP Monitoring Results ¡V AM1a

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

2-Sep-15

28

1-Sep-15

13:32

44

42

45

8-Sep-15

41

7-Sep-15

14:29

37

42

50

14-Sep-15

57

12-Sep-15

13:23

141

134

141

19-Sep-15

47

18-Sep-15

10:41

127

104

107

25-Sep-15

55

24-Sep-15

10:38

45

34

33

30-Sep-15

66

30-Sep-15

10:30

176

160

139

Average

(Range)

49

(28-66)

Average

(Range)

89

(33 ¡V 176)

 

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

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

2-Sep-15

16

1-Sep-15

13:16

33

32

41

8-Sep-15

72

7-Sep-15

11:25

40

40

48

14-Sep-15

124

12-Sep-15

13:13

140

138

150

19-Sep-15

85

18-Sep-15

10:39

138

158

187

25-Sep-15

105

24-Sep-15

10:23

40

26

26

30-Sep-15

145

30-Sep-15

10:21

121

98

98

Average

(Range)

91

 (16-124)

Average

(Range)

86

(26 ¡V 187)

 

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

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

2-Sep-15

9

1-Sep-15

13:10

14

13

17

8-Sep-15

10

7-Sep-15

11:18

45

56

62

14-Sep-15

39

12-Sep-15

13:07

148

112

111

19-Sep-15

58

18-Sep-15

10:36

85

78

87

25-Sep-15

14

24-Sep-15

10:14

61

47

37

30-Sep-15

21

30-Sep-15

10:15

144

126

116

Average

(Range)

25

 (9-58)

Average

(Range)

76

(13 ¡V 148)

 

Table 4-4         Summary of 24-hour and 1-hour TSP Monitoring Results ¡V AM7b

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

2-Sep-15

17

4-Sep-15

9:21

26

46

24

8-Sep-15

66

9-Sep-15

9:17

52

46

39

14-Sep-15

90

15-Sep-15

9:09

125

120

117

19-Sep-15

65

21-Sep-15

13:09

73

77

81

25-Sep-15

62

26-Sep-15

9:37

97

86

83

30-Sep-15

84

 

Average

(Range)

64

 (17-90)

Average

(Range)

73

(24 ¡V 125)

 

Table 4-5         Summary of 24-hour and 1-hour TSP Monitoring Results ¡V AM8

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

2-Sep-15

18

4-Sep-15

13:52

27

39

40

8-Sep-15

34

9-Sep-15

13:08

48

36

30

14-Sep-15

58

15-Sep-15

13:16

103

95

95

19-Sep-15

59

21-Sep-15

9:28

61

66

78

25-Sep-15

63

26-Sep-15

9:55

84

77

81

30-Sep-15

68

 

Average

(Range)

50

 (18-68)

Average

(Range)

64

(27 ¡V 103)

 

Table 4-6         Summary of 24-hour and 1-hour TSP Monitoring Results ¡V AM9b

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

2-Sep-15

20

1-Sep-15

9:03

30

23

24

8-Sep-15

52

7-Sep-15

9:04

54

75

85

14-Sep-15

96

12-Sep-15

9:15

96

97

77

19-Sep-15

67

18-Sep-15

14:40

86

96

70

25-Sep-15

68

24-Sep-15

13:00

79

85

82

30-Sep-15

87

30-Sep-15

14:17

131

140

153

Average

(Range)

65

(20-96)

Average

(Range)

82

(23 ¡V 153)

 

4.2.2                 As shown in Tables 4-1 to 4-6, all the 1-hour TSP and 24-hour TSP monitoring results were below the Action/Limit Levels.  No Notification of Exceedance (NOE) was issued in this Reporting Period.

 

4.2.3                 The meteorological data during the impact monitoring days are summarized in Appendix K.

5                    Construction Noise Monitoring

5.1              General

5.1.1                 In the Reporting Period, construction works under the project have been commenced in Contracts 2, 3 and 5 and Contract SS C505 and noise monitoring was performed at 8 relevant designated locations as below:

Ÿ    NM1 - Tsung Yuen Ha Village House No. 63;

Ÿ    NM2 - Village House near Lin Ma Hang Road;

Ÿ    NM5 - Village House, Loi Tung

Ÿ    NM6 - Tai Tong Wu Village House 2

Ÿ    NM7 - Po Kat Tsai Village

Ÿ    NM8 - Village House, Tong Hang;

Ÿ    NM9 - Village House, Kiu Tau Village; and

Ÿ    NM10 - Nam Wa Po Village House No. 80

 

5.1.2                 The noise monitoring schedule is presented in Appendix H and the monitoring results are summarized in the following sub-sections.

 

5.2              Noise Monitoring Results in Reporting Month

5.2.1                 In the Reporting Period, a total of 45 event noise measurements were carried out at the designated locations.  The sound level meter was set in 1m from the exterior of the building façade including noise monitoring locations NM1, NM2, NM5, NM6, NM7, NM8 and NM9.  Therefore, no façade correction (+3 dB(A)) is added according to acoustical principles and EPD guidelines.  However, free-field status was performed at NM10.  So, façade correction (+3 dB(A)) has added according to the requirement in this month.  The noise monitoring results at the designated locations are summarized in Table 5-1.  The detailed noise monitoring data are presented in Appendix I and the relevant graphical plots are shown in Appendix J.

Table 5-1         Summary of Construction Noise Monitoring Results

Construction Noise Level (Leq30min), dB(A)

Date

NM1

NM2

NM8

NM9

NM10(*)

Date

NM5

NM6

NM7

1-Sep-15

53

62

59

56

66

4-Sep-15

54

61

63

7-Sep-15

49

61

58

56

60

9-Sep-15

53

57

67

12-Sep-15

51

71

60

58

68

15-Sep-15

51

57

64

18-Sep-15

50

58

55

59

62

21-Sep-15

53

61

64

24-Sep-15

56

67

59

60

64

26-Sep-15

54

60

56

30-Sep-15

57

59

61

61

64

 

Limit Level

75 dB(A)

Remarks

(*)   façade correction (+3 dB(A) is added according to acoustical principles and EPD guidelines

 

5.2.2                 As shown in Table 5-1, the noise level measured at the designated monitoring locations NM1, NM2, NM5, NM6, NM7, NM8, NM9 and NM10, were below 75dB(A).  Furthermore, there was no noise complaints (Action Level exceedance) received by the RE, Contractors or CEDD in the Reporting Period.  Therefore, no Action or Limit Level exceedance was triggered and no corrective action was required.

 

 


 

6                    Water Quality Monitoring

6.1              General

6.1.1                 In the Reporting Period, construction works under the project has been commenced in Contracts 3, 5 and Contract SS C505  water quality monitoring was performed at 5 relevant designated locations as below:

Ÿ    WM1 ¡V Contract 5 working site downstream at Kong Yiu Channel;

Ÿ    WM1 ¡V Control ¡V Contract 5 working site upstream at Kong Yiu Channel;

Ÿ    WM4 ¡VSouth Portal of Contract 2 and Contract 3 working site downstream of Ma Wat Channel

Ÿ    WM4 ¡V Control A - Contract 3 working site Kau Lung Hang Stream

Ÿ    WM4 ¡V Control B - Contract 3 working site Upstream of Ma Wat Channel

 

6.1.2                 The water quality monitoring schedule is presented in Appendix H.  The monitoring results are summarized in the following sub-sections.

 

6.2              Results of Water Quality Monitoring

6.2.1                 In the Reporting Period, there were twelve (12) sampling days of water quality monitoring conducted at the designated water monitoring location.

 

6.2.2                 The key monitoring parameters including Dissolved Oxygen, Turbidity and Suspended Solids are summarized in Tables 6-1 and 6-2.  Breaches of water quality monitoring criteria are shown in Table 6-3.  Detailed monitoring database including in-situ measurements and laboratory analysis data are shown in Appendix I and the relevant graphical plot are shown in Appendix J.

Table 6-1         Summary of Water Quality Monitoring Results for Contracts 2 and 3

Date

Dissolved Oxygen

(mg/L)

Turbidity

(NTU)

Suspended Solids

(mg/L)

WM4

WM4-CA

WM4-CB

WM4

WM4-CA

WM4-CB

WM4

WM4-CA

WM4-CB

2-Sep-15

6.4

7.3

5.4

48.4

27.3

30.3

35.0

25.5

24.5

4-Sep-15

5.4

6.6

2.8

21.6

11.3

12.1

15.0

10.0

15.0

7-Sep-15

5.7

6.9

4.1

31.6

18.6

19.6

29.0

17.0

17.5

9-Sep-15

7.8

7.8

7.4

27.3

6.0

12.9

17.0

8.0

17.5

12-Sep-15

8.1

8.3

7.3

18.1

7.2

16.5

16.5

6.0

19.0

14-Sep-15

5.7

6.3

2.4

24.5

12.2

6.0

22.5

14.0

6.0

16-Sep-15

6.2

5.9

2.7

45.1

18.1

8.4

38.5

12.5

10.0

18-Sep-15

5.6

6.2

2.7

55.6

9.8

15.9

48.0

5.5

18.5

21-Sep-15

6.1

7.3

4.3

61.1

104.5

33.7

33.5

67.0

25.5

24-Sep-15

8.4

6.9

5.8

18.9

4.7

12.1

11.5

5.0

10.5

26-Sep-15

6.4

6.4

4.4

24.2

15.6

12.2

17.5

10.5

7.5

30-Sep-15

6.3

6.6

3.8

6.9

3.6

8.8

8.5

4.0

11.0

Remark:

i.            bold and underlined indicated Limit Level exceedance.

 

Table 6-2         Summary of Water Quality Monitoring Results for Contract 5

Date

Dissolved Oxygen

(mg/L)

Turbidity

(NTU)

Suspended Solids

(mg/L)

WM1

WM1- Control

WM1

WM1- Control

WM1

WM1- Control

2-Sep-15

6.7

6.6

over range

over range

880.0

898.5

4-Sep-15

6.1

5.9

540.0

516.5

377.5

218.0

7-Sep-15

6.4

6.3

over range

over range

957.0

915.5

9-Sep-15

6.3

6.9

59.8

20.9

58.5

17.0

12-Sep-15

7.4

8.4

59.3

16.5

58.0

10.0

14-Sep-15

7.2

6.9

21.8

22.2

17.0

18.5

16-Sep-15

7.2

6.1

47.5

46.2

52.0

65.5

18-Sep-15

8.2

8.1

14.4

13.6

9.0

12.0

21-Sep-15

7.1

7.0

113.5

120.0

79.5

89.0

24-Sep-15

7.2

6.7

46.3

49.1

41.5

42.5

26-Sep-15

7.2

6.9

13.8

14.7

4.0

5.0

30-Sep-15

7.1

7.1

11.5

9.3

4.5

3.5

Remark:

i      bold and underlined indicated Limit Level exceedance.

i      bold and italic indicated Limit Level exceedance.

 

Table 6-3      Breaches of Water Quality Monitoring Criteria in Reporting Period

Location

Dissolved Oxygen

(mg/L)

Turbidity

(NTU)

Suspended Solids

(mg/L)

Total Exceedance

Action

Limit

Action

Limit

Action

Limit

Action

Limit

WM1

0

0

2

0

2

1

4

1

WM4

0

0

0

2

0

1

0

3

No of Exceedance

0

0

2

2

2

2

4

4

 

6.2.3                 In this Reporting Period, total of eight (8) Action/ Limit Level exceedances, namely two (2) Action Level exceedances of turbidity and three (3) exceedances Action/ Limit Level of suspended solids recorded at WM1 and two (2) exceedances of turbidity and one (1) exceedance of suspended solids recorded at WM4.

 

6.2.4                 NOE was issued to relevant parties upon confirmation of the monitoring result.  The investigation for the cause of exceedance is presented in below.

 

Investigation Result for Turbidity and SS Exceedance at WM1 on 20 and 22 August 2015 (follow up of last Reporting Period)

6.2.5                 According to the site information provided from the Contractor of C2 (DHK), construction activities carried out on 25 July 2015 at South Portal included tunnel excavation and ventilation building formation and piling works which undertaken away from the Ma Wat River.

 

6.2.6                 According to the site record from the monitoring team, no abnormality was observed at both control station WM4-CA and WM4-CB. However, muddy water was observed at impact station WM4. During the course of monitoring, there were no observable water impacts such as muddy water discharge from the site, therefore, the Contractor and ET carried out a visit at the upstream area to trace the source of muddy water.

 

6.2.7                 As shown in the photo record, muddy water has been flowed from other upstream location which was not under monitored by the Contract. This situation was also frequently recorded during weekly joint site inspection by the RE, IEC, Contractor and ET since the contract commencement.   In conclusion, it is considered that the exceedance was due to the external muddy water from upstream and not related to the works under the Contract.

 

Investigation Result for Exceedance at WM1 on 20 August 2015 (Contract 5) (follow up of last Reporting Period)

6.2.8                 According to the site information provided by the Contractor, Formation work at BCP and construction of Depressed Road at BCP3 were carried out under Contract 5 on 20 August 2015.  No wastewater discharges were made on 20 August 2015

 

6.2.9                 According to the site record by the monitoring team, there was heavy rain before the monitoring works and high rainfall was recorded at Ta Kwu Ling Weather Station. During the course of water monitoring on 20 August 2015, muddy water was observed throughout the channel including both impact and control station.

 

6.2.10             Since the water monitoring was conducted after rain, the existing condition of the river water was deteriorated by vigorous water flow in the river and stirred up the sediment at river bed.  High turbidity and SS result was also recorded at upstream control station.  In view of the subsequent monitoring activities and results during non-rainy day in the week after, there were no exceedances triggered.  It is considered that the exceedances were a single incident due to the rainstorm.

 

Investigation Result for Exceedance at WM1 on 22 August 2015 (Contract 5) (follow up of last Reporting Period)

6.2.11             According to the site information provided by the Contractor, formation work at BCP and construction of Depressed Road at BCP3 were carried out under Contract 5 on 22 August 2015.  Moreover, no wastewater discharge was made on 22 August 2015.

 

6.2.12             According to the site record by the monitoring team, no wastewater discharge from the site was observed and the water in WM1 was in pale yellow. As observed by the monitoring staff, the water depth at WM1 was shallow (0.31m) and the sediment of the riverbed was very loose due to continuous rainfall on 20 and 21 August 2015. Therefore, cloudy water was unavoidably generated when the sampling bucket stirred up the loose sediment during water sampling.

 

6.2.13             In view of the subsequent monitoring result, the turbidity and SS level was constantly reduced.  Since there were no discharges and runoff generated from the construction site.  It is considered that the exceedances were not likely due to the works under the project

 

Investigation Result for Exceedance at WM1 on 4 September 2015 (Contract SS C505)

6.2.14             According to the site information provided by the Contractor, percussive piling, pre-drilling and excavation was carried out on 4 September 2015 and the active construction area was carried out away from the river course. 

 

6.2.15             During the ET¡¦s site inspection on 9 and 16 September 2015, it was observed that, to avoid direct discharge of surface runoff, temporary drainage channel has been constructing at the periphery of the site to intercept and divert the runoff to the wastewater treatment facilities. No discharge was observed during the site inspection. 

 

6.2.16             As advised by the Contractor, as the water mitigation measures, all the treated water was recirculated in pre-drilling works or watering on site area and haul roads since commencement of contract.

 

6.2.17             According to the site record by the ET, there was heavy rain before the monitoring work and muddy water was observed throughout the channel.  Moreover, high concentration of turbidity and SS were also recorded at the upstream control station.  It is considered that the exceedances were due to the rain and not likely related to the works under the project.

 

Investigation Result for Exceedance at WM1 on 4 September 2015 (Contract 5)

6.2.18             To be reported.

 

Investigation Result for Exceedance at WM1 on 9 and 12 September 2015 (Contract SS C505)

6.2.19             To be reported.

 

Investigation Result for Exceedance at WM1 on 9 and 12 September 2015 (Contract 5)

6.2.20             To be reported.

 

Investigation Result for Exceedance at WM4 on 16 September 2015 (Contract 2)

6.2.21             To be reported.

 

Investigation Result for Exceedance at WM4 on 16 September 2015 (Contract 3)

6.2.22             According to the site diary provided by the Contractor, construction works carried out on 16 September 2015 included erection of formwork, excavation, fixing reinforcement bar, backfilling and compaction and pipe laying. The works were carried out away from the watercourse. Surface runoff and wastewater generated from site was all diverted and treated by wastewater treatment facilities prior to discharge.

 

6.2.23             According to the site record from the monitoring team, no abnormality was observed at both control station WM4-CA and WM4-CB but muddy water was observed at impact station WM4.

 

6.2.24             Joint site inspection was carried out by the RE, IEC, Contractor and ET on 16 September 2015. It was observed that muddy water has been flowing from an upstream location which was not under monitored by the Contract.  Turbid water was also observed at Bridge D2 and it was considered that the stream water was affected by the muddy water from upstream location.

 

6.2.25             In conclusion, it is considered that the exceedance was due to the external muddy water from upstream and not related to the works under the Contract.

 

Investigation Result for Exceedance at WM4 on 18 September 2015 (Contract 2)

6.2.26             To be reported.

 

Investigation Result for Exceedance at WM4 on 18 September 2015 (Contract 3)

6.2.27             To be reported.

 


 

7                    Waste Management

7.1              General Waste Management

7.1.1                 Waste management was carried out by an on-site Environmental Officer or an Environmental Supervisor from time to time.

 

7.2              Records of Waste Quantities

7.2.1                 All types of waste arising from the construction work are classified into the following:

l Construction & Demolition (C&D) Material;

l Chemical Waste;

l General Refuse; and

l Excavated Soil.

 

7.2.2                 The quantities of waste for disposal in this Reporting Period are summarized in Tables 7-1 and 7-2 and the Monthly Summary Waste Flow Table is shown in Appendix L.  Whenever possible, materials were reused on-site as far as practicable.

 

Table 7-1         Summary of Quantities of Inert C&D Materials for the Project

Type of Waste

Contract 2

Contract 3

Contract 5

Contract SS C505

Total Quantity

Quantity

Disposal Location

Quantity

Disposal Location

Quantity

Disposal Location

Quantity

Disposal Location

C&D Materials (Inert) (in '000m3)

41.5817

--

2.092

--

0

--

0.94

--

44.6137

Reused in this Project (Inert)

(in '000 m3)

0.1339

--

0.264

--

0

--

0.94

--

1.3379

Reused in other Projects (Inert)

(in '000 m3)

40.550

C6/ NENT

0.370

NENT

0

--

0

--

40.92

Disposal as Public Fill (Inert) (in '000 m3)

0.8975

Tuen Mun 38

1.828

Tuen Mun 38

0

--

0

--

2.7255

 

Table 7-2        Summary of Quantities of C&D Wastes for the Project

Type of Waste

Contract 2

Contract 3

Contract 5

Contract SS C505

Total Quantity

Quantity

Disposal Location

Quantity

Disposal Location

Quantity

Disposal Location

Quantity

Disposal Location

Recycled Metal (¡¥000kg) #

0

-

0

-

0

--

0

--

0

Recycled Paper / Cardboard Packing (¡¥000kg) #

0

-

0

-

0

--

0

--

0

Recycled Plastic (¡¥000kg) #

0

-

0.0001

Licensed collector

0

--

0

--

0.0001

Chemical Wastes (¡¥000kg) #

1.0560

Licensed collector

0

-

0

--

0

--

1.0560

General Refuses (¡¥000m3)

0.0611

NENT

0.115

NENT

0.005

NENT

0.0068

NENT

0.1879

Remark #: Unit of recycled metal, recycled paper/ cardboard packing, recycled plastic and chemical waste for Contractor 3 was in (¡¥000m3).


8                    Site Inspection

8.1              requirements

8.1.1                 According to the approved EM&A Manual, the environmental site inspection shall be formulation by ET Leader.  Weekly environmental site inspections should carry out to confirm the environmental performance.

 

8.2              Findings / Deficiencies During the Reporting Month

Contract 2

8.2.1                 In the Reporting Period, joint site inspection for Contract 2 to evaluate the site environmental performance has been carried out by the RE, IEC, ET and the Contractor on 4, 11, 18 and 25 September 2015.  No non-compliance was noted.

 

8.2.2                 The findings / deficiencies of Contract 2 that observed during the weekly site inspection are listed in Table 8-1.

Table 8-1           Site Observations for Contract 2

Date

Findings / Deficiencies

Follow-Up Status

4 September 2015

Ÿ  Stagnant water cumulated inside the drip tray should be removed to maintain the drip tray is functional. (South Portal)

Ÿ  Stagnant water cumulated inside the drip tray was removed.

11 September 2015

Ÿ  Chemical waste storage container should be security locked. (South Portal)

Ÿ  Chemical waste container was properly locked..

18 September 2015

Ÿ  Two overflow pipe was observed nearby the storm water stream. Turbid water and mud was cumulated nearby, the contractor should clean up the mud and water to prevent discharge into the water course.. (North Portal)

Ÿ  The overflow pipes were pluged and mud which cumulated nearby was cleared.

25 September 2015

Ÿ  Dark smoke emitted from the backhoe was observed. Proper maintenance should be provided.  (South Portal)

Ÿ  No dark smoke emitted from the backhoe was observed.

Ÿ  Lifting eyes of the concrete block should filled with sand to prevent stagnant water cumulated inside. (North Portal)

Ÿ  lifting eyes fileld with sand was observed to prevent stagnant water accmulation.

 

Contract 3

8.2.3                 In the Reporting Period, joint site inspection for Contract 3 to evaluate the site environmental performance has been carried out by the RE, IEC, ET and the Contractor on 7, 16, 21 and 29 September 2015.  No non-compliance was noted.

 

8.2.4                 The findings / deficiencies of Contract 3 that observed during the weekly site inspection are listed in Table 8-2.

Table 8-2           Site Observations for Contract 3

Date

Findings / Deficiencies

Follow-Up Status

7 September 2015

Ÿ  Surface runoff to the river course was observed near Pier AC4, the Contractor should provide sand bags to divert the runoff to the wastewater treatment facilities.

Ÿ  Sand bags were erected near Pier AC4 to prevent direct runoff into the river course.

16 September 2015

Ÿ  Wheel washing notice should be displayed at all site exit to remind the vehicle driver to undertake wheel washing before leaving the site.

Ÿ  Not required for reminder.

21 September 2015

Ÿ  The Contractor was reminded to ensure all the vehicles are washed properly before leaving the construction site.

Ÿ  Not required for reminder.

29 September 2015

Ÿ  The Contractor was reminded to increase the frequency of water spraying on haul road.

Ÿ  Not required for reminder.

Ÿ  The Contractor was reminded to maintain proper function of the pH reading shown on the Wetsep.

Ÿ  Not required for reminder.

 

Contract 5

8.2.5                 In the Reporting Period, joint site inspection for Contract 5 to evaluate the site environmental performance has been carried out by the RE, IEC, ET and the Contractor on 2, 10, 17, 24 and 30 September 2015.  No non-compliance was noted.

 

8.2.6                 The findings / deficiencies of Contract 5 that observed during the weekly site inspection are listed in Table 8-3.

Table 8-3           Site Observations for Contract 5

Date

Findings / Deficiencies

Follow-Up Status

2 September 2015

Ÿ  No adverse environmental were observed.

Ÿ  NA

10 September 2015

Ÿ  Soil and gravel on LMH public road (near AM2) were observed, the Contractor should clean the road regularly and maintain cleanliness.

Ÿ  Soil and gravel on LMH public road (near AM2) has been cleaned up.

17 September 2015

Ÿ  The Contractor was reminded to maintain site cleanliness, all the disused materials and general refuse should be removed regularly. (Location: BCP)

Ÿ  Not required for reminder.

24 September 2015

Ÿ  The Contractor was reminded to improve the site tidiness and housekeeping, also all the general refuse should be removed regularly. (Location: 1500 Pipe)

Ÿ  Not required for reminder.

Ÿ  The wheel washing notice should be placed properly in order to give a better vision to the driver. (Location LMH site office)

Ÿ  Not required for reminder.

Ÿ  The Contractor was reminded to fence off the tree protection area. (Location: 1500 Pipe area)

Not required for reminder.

30 September 2015

Ÿ  Wheel washing notice sign should display at all site exit and make sure all vehicles leaving from site are clean.

Ÿ  Not required for reminder.

 

Contract SS C505

8.2.7                 In the Reporting Period, joint site inspection for Contract SS C505 to evaluate the site environmental performance has been carried out by the RE, IEC, ET and the Contractor on 2, 9, 16, 23 and 30 September 2015.  No non-compliance was noted.

 

8.2.8                 The findings / deficiencies of Contract 5 that observed during the weekly site inspection are listed in Table 8-4.

Table 8-4           Site Observations for Contract SS C505

Date

Findings / Deficiencies

Follow-Up Status

2 September 2015

Ÿ  Plug for the drip tray missing was observed. The contractor should plug the drip tray to prevent stagnant water cumulated inside the drip tray leaking out.

Ÿ  A plug was provided for the drip tray.

9 September 2015

Ÿ  The Contractor was reminded to provide secondary containment such as drip tray and chemicals labels to the chemical containers at WetSep in Portion 1.

Ÿ  Not required for reminder.

16 September 2015

Ÿ  Stagnant water was observed on site. The Contractor was reminded to take measures to avoid stagnant water storage for mosquito breeding prevention.

Ÿ  Not required for reminder.

Ÿ  Dusty stockpile without proper cover was observed. The Contactor was reminded to cover the stockpile with impervious sheet to reduce dust generation.

Ÿ  Not required for reminder.

Ÿ  The Contractor was reminded to increase the frequency of water spray on the haul road.

Ÿ  Not required for reminder.

23 September 2015

Ÿ  Opened sand stockpile was observed at Portion 1 Piling Area, the Contract should cover the stockpile with impervious sheet to reduce dust impact.

Opened sand stockpile was covered with impervious sheet to reduce dust impact.

Ÿ  The Contractor was reminded to provide water spraying on haul road in upcoming dry season.

Ÿ  Not required for reminder.

30 September 2015

Ÿ  The Contractor was reminded to increase the frequency of water spraying on haul road in upcoming dry season.

Ÿ  Not required for reminder.

Ÿ  The Contractor was reminded to provide movable noise barriers around the piling work areas to reduce the noise impact to the surrounding noise sensitive receivers.

Ÿ  Not required for reminder.

 

8.2.9                 Overall, general housekeeping such as daily site tidiness and cleaniness should be maintained for all Contracts.  Furthermore, the Contractors were reminded to implement Waste Management Plan of the Project.

 

Other Contracts

8.2.10             Since the construction works at the Contract 4, Contract 6 and Contract 7 have not yet been commenced, no site inspection is performed for these Contracts.

9                    Environmental Complaint and Non-Compliance

9.1              Environmental Complaint, Summons and Prosecution

9.1.1                 In the Reporting Period, no environmental complaints, summons and prosecution under the EM&A Programme was lodged.

 

9.1.2                 The statistical summary table of environmental complaint is presented in Tables 9-1, 9-2 and 9-3.

 Table 9-1         Statistical Summary of Environmental Complaints

Reporting Period

Contract No

Environmental Complaint Statistics

Frequency

Cumulative

Complaint Nature

19 May 2014 ¡V

31 Aug 2015

Contract 2

0

13

Ÿ  (6) Water Quality

Ÿ  (5) Construction Dust

Ÿ  (2) Noise

06 Nov 2013 ¡V

31 Aug 2015

Contract 3

0

3

Ÿ  (1) Construction Dust

Ÿ  (2) Water quality

16 Aug 2013 ¡V

31 Aug 2015

Contract 5

0

2

Ÿ  (2) Construction Dust

1 ¡V 30 Sep 2015

Contract 2

0

13

Ÿ  (6) Water Quality

Ÿ  (5) Construction Dust

Ÿ  (2) Noise

Contract 3

0

3

Ÿ  (1) Construction Dust

Ÿ  (2) Water quality

Contract 5

0

2

Ÿ  (2) Construction Dust

Contract

SS C505

0

0

N/A

 

Table 9-2           Statistical Summary of Environmental Summons

Reporting Period

Contract No

Environmental Summons Statistics

Frequency

Cumulative

Complaint Nature

19 May 2014 ¡V

31 Aug 2015

Contract 2

0

0

NA

06 Nov 2013 ¡V

31 Aug 2015

Contract 3

0

0

NA

16 Aug 2013 ¡V

31 Aug 2015

Contract 5

0

0

NA

1 ¡V 30 Sep 2015

Contract 2

0

0

NA

Contract 3

0

0

NA

Contract 5

0

0

NA

Contract

SS C505

0

0

NA

 

Table 9-3           Statistical Summary of Environmental Prosecution

Reporting Period

Contract No

Environmental Prosecution Statistics

Frequency

Cumulative

Complaint Nature

19 May 2014 ¡V

31 Aug 2015

Contract 2

0

0

NA

06 Nov 2013 ¡V

31 Aug 2015

Contract 3

0

0

NA

16 Aug 2013 ¡V

31 Aug 2015

Contract 5

0

0

NA

1 ¡V 30 Sep 2015

Contract 2

0

0

NA

Contract 3

0

0

NA

Contract 5

0

0

NA

Contract

SS C505

0

0

NA

 

The Other Contracts

9.1.3                 Since the construction works at the Contract 4, Contract 6 and Contact 7 have not yet commenced, no environmental complaint, summons and prosecution under the EM&A Programme are registered in the Reporting Period.


10                Implementation Status of Mitigation Measures

10.1          General Requirements

10.1.1             The environmental mitigation measures that recommended in the Implementation Schedule for Environmental Mitigation Measures (ISEMM) in the approved EM&A Manual covered the issues of dust, noise, water and waste and they are summarized presented in Appendix M.

 

10.1.2             All contracts under the Project shall be implementing the required environmental mitigation measures according to the approved EM&A Manual as subject to the site condition.  Environmental mitigation measures generally implemented by Contracts 2, 3, 5 and Contract SS C505 in this Reporting Period are summarized in Table 10-1.  

 

Table 10-1         Environmental Mitigation Measures

Issues

Environmental Mitigation Measures

Water Quality

¡P       Wastewater to be treated by the wastewater treatment facilities i.e. sedimentation tank or AquaSed before discharge.

Air Quality

¡P       Maintain damp / wet surface on access road

¡P       Keep slow speed in the sites

¡P       All vehicles must use wheel washing facility before off site

¡P       Sprayed water during breaking works

¡P       A cleaning truck was regularly performed on the public road to prevent fugitive dust emission

Noise

¡P       Restrain operation time of plants from 07:00 to 19:00 on any working day except for Public Holiday and Sunday.

¡P       Keep good maintenance of plants

¡P       Place noisy plants away from residence or school

¡P       Provide noise barriers or hoarding to enclose the noisy plants or works

¡P       Shut down the plants when not in used.

Waste and Chemical Management

¡P       On-site sorting prior to disposal

¡P       Follow requirements and procedures of the ¡§Trip-ticket System¡¨

¡P       Predict required quantity of concrete accurately

¡P       Collect the unused fresh concrete at designated locations in the sites for subsequent disposal

General

¡P       The site was generally kept tidy and clean.

 

10.2          Tentative Construction Activities in the Coming Month

10.2.1             Construction activities as undertaken in the coming month for the Project lists below:

Contract 2

Mid-Vent Portal

Ÿ    Adit invert slab

Ÿ    Cavern excavation

Ÿ    Ventilation Building foundation works

North Portal

Ÿ    Permanent slope and hydroseeding

Ÿ    South Bound invert grouting and noise door installation

Ÿ    North Bound noise door installation

Ÿ    North Bound top heading canopies

Ÿ    TBM sliding to face

Ÿ    Associated equipment installation for operation of TBM (mortar plant, cooling system etc.)

Ÿ    TBM initial drive

South Portal

Ÿ    Rock Excavation to Vent. Bldg. Formation

Ÿ    Southbound excavation foundation works

Ÿ    Northbound excavation and bored piles works

Ÿ    Drill and blast set up and site installation

Ÿ    Installation of blast door for Southbound and Northbound tunnel

Admin Building

Ÿ    Removal of surcharge

Ÿ    Upgrade wheel-washing facilities

Ÿ    Drainage works

Contract 3

Ÿ   Cable detection and trial trenches

Ÿ   Decking construction for Bridge E

Ÿ   E&M work for new valve control & Telemetry House

Ÿ   Filling works at Tong Hang East

Ÿ   Storm Drains Laying

Ÿ   Noise barrier construction

Ÿ   Pier / Pier Table construction

Ÿ   Pile cap works

Ÿ   Portal beam erection

Ÿ   Pre-drilling works and piling works for viaduct

Ÿ   Retaining Wall construction

Ÿ   Road works at Fanling Highway

Ÿ   Slope works

Ÿ   Socket H-pile installation

Ÿ   Tree felling works

Ÿ   Utilities duct laying

Ÿ   Viaduct segment erection

Ÿ   Construction of temporary steel ramp for Kiu Tau Footbridge

Ÿ   Demolition of existing ramp of Kiu Tau Footbridge

Contract 5

Ÿ   Laying of additional rising main at LMH road

Ÿ   Bituminous laying at proposed and existing LMH road.

Ÿ   Construction of secondary boundary fencing

Ÿ   Construction of Temporary Secondary Boundary Fencing

Ÿ   Brick laying at footpath of proposed LMH road

Ÿ   Road works (kerb laying) for proposed LMH road and existing LMH road

Ÿ   Formation works at BCP area

Ÿ   Construction of access road (RS4)

Ÿ   Construction of Depressed Road at BCP3

Ÿ   Filling work for ArchSD permanent office

Ÿ   Drainage works at exiting LMH Road

Ÿ   Water works at proposed LMH Road

Ÿ   Irrigation system at proposed and existing LMH Road

Ÿ   Drainage works at BCP area

Ÿ   Installation of Underground utilities at proposed and existing LMH Road

Ÿ   Re-construction of Pavilion at Chung Yuen Ha Village

Contract SS C505

Ÿ   Excavation & fill works

Ÿ   Predrilling

Ÿ   Percussive piling

Ÿ   Pile caps

Ÿ   Site office set-up

Ÿ   Structural works

 

10.3          Key Issues for the Coming Month

10.3.1             Key issues to be considered in the coming month for Contracts 2, 3, 5,6 and SS C505 include:

Ÿ    Implementation of control measures for rainstorm;

Ÿ    Regular clearance of stagnant water during wet season;

Ÿ    Implementation of dust suppression measures at all times;

Ÿ    Potential wastewater quality impact due to surface runoff;

Ÿ    Potential fugitive dust quality impact due from the dry/loose/exposure soil surface/dusty material;

Ÿ    Disposal of empty engine oil containers within site area;

Ÿ    Ensure dust suppression measures are implemented properly;

Ÿ    Sediment catch-pits and silt removal facilities should be regularly maintained;

Ÿ    Management of chemical wastes;

Ÿ    Discharge of site effluent to the nearby wetland, stockpiling or disposal of materials, and any dredging or construction area at this area are prohibited;

Ÿ    Follow-up of improvement on general waste management issues; and

Ÿ    Implementation of construction noise preventative control measures

 

10.3.2             Contract 4, Contract 6 and Contact 7 have not yet commenced and no environmental issue is presented.


11                Conclusions and Recommendations

11.1          Conclusions

11.1.1             This is 26th monthly EM&A report presenting the monitoring results and inspection findings for the Reporting Period from 1 to 30 September 2015.

 

11.1.2             For air quality monitoring, no 1-hour and 24-hour TSP monitoring results triggered the Action or Limit Levels were recorded. No NOEs or the associated corrective actions were therefore issued.

 

11.1.3             No noise complaint (which is an Action Level exceedance) was received and no construction noise measurement results that exceeded the Limit Level were recorded in the Reporting Period. No NOEs or the associated corrective actions were therefore issued.

 

11.1.4             For water quality monitoring, total of eight (8) Action/ Limit Level exceedances, namely two (2) Action Level exceedances of turbidity and three (3) exceedances Action/ Limit Level of suspended solids recorded at WM1 and two (2) exceedances of turbidity and one (1) exceedance of suspended solids recorded at WM4.  The investigations for the cause of exceedances were in progress.

 

11.1.5             No notification of summons or successful prosecution under the EM&A Programme of the Project was received in the reporting period for Contract 2, 3, 5 and SS C505.

 

11.1.6             No environmental complaint under the EM&A Programme of the Project was received in the reporting period for Contract 2, 3, 5 and SS C505.

 

11.1.7             During the Reporting Period, weekly joint site inspection by the RE, IEC, ET with the relevant Main-contractor were carried out for Contracts 2, 3, 5 and SS C505 in accordance with the EM&A Manual stipulation.  No non-compliance observed during the site inspection. 

 

11.2          Recommendations

11.2.1             As dry season is approaching, special attention should be paid on the potential construction dust impact since most of the construction sites are adjacent to villages. The Contractor should fully implement the construction dust mitigation measures properly.

 

11.2.2             The Contractor was also reminded to prevent muddy water or other water pollutants from site surface flow to local stream such as Kong Yiu Channel and Ma Wat Channel or public area.  Water quality mitigation measures to prevent surface runoff into nearby water bodies or public areas should paid attention and fully implemented.  

 

11.2.3             Construction noise should be a key environmental impact during the works.  The noise mitigation measures such as use of quiet plants or temporary noise barrier installation at the construction noise predominate area should be implemented as accordance with the EM&A requirement.

 

11.2.4             Furthermore, daily cleaning and weekly tidiness shall be properly performed and maintained. In addition, mosquito control should be kept to prevent mosquito breeding on site.