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.21) – April 2015

 

 

 

 

 

 

 

 

Prepared For

 

 

 

 

Civil Engineering and Development Department (CEDD)

 

 

 

 

 

 

 

 

 

 

 

Date

Reference No.

Prepared By

Certified By

13 May 2015

TCS00670/13/600/R0369v2

Nicola Hon

(Environmental Consultant)

Tam Tak Wing

(Environmental Team Leader)

 

Version

Date

Remarks

1

8 May 2015

First Submission

2

13 May 2015

Amended according to the IEC’s comments on 11 May 2015

 

 

 

 

 

 

executive summary

ES01            This is the 21th monthly EM&A report presenting the monitoring results and inspection findings for the reporting period from 1 to 30 April 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 five CEDD contracts including Contract 2 (CV/2012/08), Contract 3 (CV/2012/09), Contract 4 (TCSS), Contract 5 (CV/2013/03) and Contract 6 (CV/2013/08).

 

ES03            Currently, the construction works has been undertaken for Contract 2, Contract 3 and Contract 5.  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

30

Construction Noise

Leq(30min) Daytime

8

40

Water Quality

Water sampling

3 (Contract 2&3)

13(*)

2 (Contract 5)

11(*)

Joint Site Inspection / Audit

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

Contract 2

5

Contract 3

4

Contract 5

5

(*) Monitoring day

 

Breach of Action and Limit (A/L) Levels

ES04            In the Reporting Period, no noise exceedance was registered for the Project.  However, 1 Limit Level exceedance of 24-hour for air quality exceedance was recorded at AM3 and a total of thirteen (13) water quality exceedances were recorded at W1 and W4. 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

1

1

Not project related

N/A

Construction Noise

Leq(30min) Daytime

0

0

0

--

--

Water Quality

DO

0

7

7

All exceedances were not project related

N/A

Turbidity

0

3

3

All exceedances were not project related

N/A

SS

0

3

3

All exceedances were not project related

N/A

 

Environmental Complaint

ES05            In this Reporting Period, no environmental complaint in relation to the EM&A Programme was recorded.

 

Notification of Summons and Successful Prosecutions

ES06            No environmental summons or successful prosecutions were recorded in the Reporting Period.

 

Reporting Change

ES07            No reporting changes were made in the Reporting Period.

 

Site Inspection

ES08            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 1, 10, 17, 24 and 29 April 2015.  No non-compliance was noted.

 

ES09            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 8, 15, 20 and 27 April 2015.  No non-compliance was noted.

 

ES10            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, 9, 16, 23 and 30 April 2015.  No non-compliance was noted.

 

Future Key Issues

ES11            During raining season, 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 will be key environment issue.  Water quality mitigation measures to prevent surface runoff into nearby water bodies or public areas should paid attention and fully implement.  

 

ES12            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.

 

ES13            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  6

2.4            Construction Progress  6

2.5            Summary of Environmental Submissions  7

3     Summary of Impact Monitoring Requirements  10

3.1            General  10

3.2            Monitoring Parameters  10

3.3            Monitoring Locations  10

3.4            Monitoring Frequency and Period   12

3.5            Monitoring Equipment  12

3.6            Monitoring Methodology   15

3.7            Equipment Calibration   16

3.8            Derivation of Action/Limit (A/L) Levels  17

3.9            Data Management and Data QA/QC Control  18

4     Air Quality Monitoring   19

4.1            General  19

4.2            Air Quality Monitoring Results in Reporting Month   19

5     Construction Noise Monitoring   22

5.1            General  22

5.2            Noise Monitoring Results in Reporting Month   22

6     Water Quality Monitoring   23

6.1            General  23

6.2            Results of Water Quality Monitoring   23

7     Waste Management   27

7.1            General Waste Management  27

7.2            Records of Waste Quantities  27

8     Site Inspection   28

8.1            requirements  28

8.2            Findings / Deficiencies During the Reporting Month   28

9     Environmental Complaint and Non-Compliance   32

9.1            Environmental Complaint, Summons and Prosecution   32

10   Implementation Status of Mitigation Measures  33

10.1          General Requirements  33

10.2          Tentative Construction Activities in the Coming Month   33

10.3          Key Issues for the Coming Month   34

11   Conclusions and Recommendations  36

11.1          Conclusions  36

11.2          Recommendations  36

 

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 – AM1a

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

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

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

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

Table 4-6        Summary of 24-hour and 1-hour TSP Monitoring Results – 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 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 – this section comprises at-grade and viaducts and includes the improvement works at Lin Ma Hang Road;

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

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

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

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

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

 

1.1.4                 Action-United Environmental Services & Consulting 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 21st monthly EM&A report presenting the monitoring results and inspection findings for reporting period from 1 to 30 April 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:

·              Contract 2 (CV/2012/08)

·              Contract 3 (CV/2012/09)

·              Contract 4 (TCSS)

·              Contract 5 (CV/2013/03)

·              Contract 6 (CV/2013/08)

 

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:

·                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;

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

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

·                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;

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

·                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:

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

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

·                widening of the existing Fanling Highway (HyD’s entrustment works);

·                demolishing existing Kiu Tau vehicular bridge and Kiu Tau footbridge and reconstruction of the existing Kiu Tau Footbridge (HyD’s entrustment works); and

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

 

Contract 4 (Contract number to be assigned)

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:

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

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

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

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

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

·                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 is still yet awarded.  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.

 

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.

 

Environmental Protection Department (EPD)

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

 

Engineer or Engineers Representative (ER)

2.2.4                 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:

·           Monitor the Contractors’ compliance with contract specifications, including the implementation and operation of the environmental mitigation measures and their effectiveness

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

·           Facilitate ET’s implementation of the EM&A programme

·           Participate in joint site inspection by the ET and IEC

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

·           Adhere to the procedures for carrying out complaint investigation

·           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)

2.2.5                 There will be one contractor for each individual works contract.  The Contractor(s) should report to the ER.  The duties and responsibilities of the Contractor are:

·           Comply with the relevant contract conditions and specifications on environmental protection

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

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

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

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

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

·           Adhere to the procedures for carrying out complaint investigation

 

Environmental Team (ET)

2.2.6                 One ET will be employed for this Project.  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:

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

·           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

·           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

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

·           Audit environmental conditions on site

·           Report on the environmental monitoring and audit results to EPD, the ER, the lEC and Contractor(s) or their delegated representatives

·           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

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

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

·           Adhere to the procedures for carrying out complaint investigation

·           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)

2.2.7                 One IEC will be employed for this Project.  The Independent Environmental Checker (IEC) should not be in any way an associated body of the Contractor(s) 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 duty of IEC should be:

·           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

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

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

·           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

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

·           Check compliance with the procedures for carrying out complaint investigation

·           Check the effectiveness of corrective measures

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

·           Check that the mitigation measures are effectively implemented

·           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

·           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.

 

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 (Environmental Permit EP-430/2011);

                                (b)            Building works and road works by contractors of Architectural Services Department (ArchSD) (Environmental Permit EP-404/2011/B);

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

                                (d)            Construction of cross-boundary vehicular and pedestrian bridges (total 5 numbers) across the Shenzhen River; and

                                (e)            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 and 5 and they are summarized in below.  Moreover, the 3-month rolling construction program of the Contracts 2, 3 and 5 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    Tunnel excavation

North Portal

Ÿ    Permanent slope formation (soil nailing works)

Ÿ    Conveyor Belt System Construction for Tunnel Boring Machine (TBM)

Ÿ    South Bound Tunnel Bench excavation

Ÿ    North Bound Top heading excavation (canopies)

Ÿ    TBM onsite assembly + testing and commissioning

Ÿ    MS (water treatment system) testing and commissioning

South Portal

Ÿ    Temporary Slope Cut with Soil Nails Installation

Ÿ    2nd Wetsep Delivery + testing and commissioning

Admin Building

Ÿ    Backfilling for surcharge

Ÿ    Drainage works

Ÿ    Site hoarding

 

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   Abutment construction for Bridge E

Ÿ   Cable detection and trial trenches

Ÿ   Catch fence erection

Ÿ   Demolition of central divider at Fanling Highway

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

Ÿ   Erection of temporary support at DSD nullah for Bridge E

Ÿ   Filling works at Tong Hang East

Ÿ   Lagging wall for bored pile wall

Ÿ   Laying storm drains

Ÿ   Noise barrier construction

Ÿ   Pier construction

Ÿ   Pier table construction

Ÿ   Pile cap works

Ÿ   Pile works

Ÿ   Pre-drilling works

Ÿ   Road works at Fanling Highway

Ÿ   Sewer works at Tai Wo Service Road West (TWSRW)

Ÿ   Tree felling works

Ÿ   Utilities duct laying

Ÿ   Waterworks

 

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   Laying additional rising mains at LMH road

Ÿ   Construction of secondary boundary fencing

Ÿ   Construction of Depressed Road at BCP3

Ÿ   Construction of retaining wall No.2a

Ÿ   Waterproofing and backfilling works for Western pedestrian subway & staircase at LMH

Ÿ   Parapet installation at Bridge J

Ÿ   Construction of chain link fence and trapezoidal channel at BCPA

Ÿ   Drainage works at existing/proposed LMH Road

Ÿ   Drainage works (Connection to Box 3, Box 4 & construction of sedimentation tank) at BCP Area

Ÿ   Water works 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 LMH road

 

Contract 6 (CV/2013/08)

2.4.6                 The contract has not yet been awarded.

 

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 and 5

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 and 5

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

 

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

Contract 2

1

Air pollution Control (Construction Dust) Regulation

Ref No.: 368864

31 Dec 2013

2

Chemical Waste Producer Registration

North Portal

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

Valid from

25 Mar 2014

Mid-Vent Portal

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

Valid from

25 Mar 2014

South Portal

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

Valid from

9 Apr 2014

3

Water Pollution Control Ordinance - Discharge License

No.WT00018374-2014

Valid from 3 Mar 2014 to 28 Feb 2019

No.: W5/1I389

Valid from 28 Mar 2014 to 31 Mar 2019

No.: W5/1I390

Valid from 24 Mar 2014 to 31 Mar 2019
Surrendered, effective 19 June 2014

No.: W5/1I391

Valid from 28 Mar 2014 to 31 Mar 2019

No.: W5/1I392

Valid from 28 Mar 2014 to 31 Mar 2019

4

Waste Disposal Regulation - Billing Account for Disposal of Construction Waste

Account No. 7019105

Valid from 8 Jan 2014

5

Construction Noise Permit

GW-RN0693-14

Valid 11 Nov 2014 -

10 May 2015

GW-RN0092-15

Valid 23 Feb 2015 -

22 May 2015

GW-RN0091-15

Valid 23 Feb 2015 -

22 May 2015

GW-RN0778-14

Valid 29 Dec 2014 -

28 Jun 2015

GW-RN0087-15

Valid 23 Feb 2015 -

22 May 2015

GW-RN0195-15

Valid 30 Mar 2015 -

30 May 2015

Contract 3

1

Air pollution Control (Construction Dust) Regulation

Ref. No: 362101

Notification received by EPD on 17 Jul 2013

2

Chemical Waste Producer Registration

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

Valid form 7 Oct 2013 till the end of Contract

3

Water Pollution Control Ordinance - Discharge License

No.:WT00016832 – 2013

Valid from 28 Aug 13 to 31 Aug 2018

4

Waste Disposal Regulation - Billing Account for Disposal of Construction Waste

Account No. 7017914

Valid form 2 Aug 13 till the end of Contract

5

Construction Noise Permit

GW-RN0684-14

Valid on 16 Nov 2014 till 26 Apr 2015

GW-RN0095-15

Valid on 24 Feb 2015 till 18 Jul 2015

GW-RN0129-15

Valid on 3 Mar 2015 till 30 May 2015

GW-RN0120-15

Valid on 8 Mar 2015 till 1 Jul 2015

GW-RN0230-15

Valid on 15 Apr 2015 till 14 Oct 2015

Contract 5

1

Air pollution Control (Construction Dust) Regulation

Ref. No: 359338

Notified EPD on 13 May 2013

2

Chemical Waste Producer Registration

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

Valid form 8 Jun 2013 till the end of Contract

3

Water Pollution Control Ordinance - Discharge License

No.: W5/1G44/1

Valid from 8 Jun 13 to 30 Jun 2018

4

Waste Disposal Regulation - Billing Account for Disposal of Construction Waste

Account No. 7017351

Valid form 29 Apr 13 till the end of Contract

5

Construction Noise Permit

NA

NA

 

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 (℃).

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

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

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

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

Contract 5

WM1- Control

Upstream of Kong Yiu Channel

834 185

845 917

NA

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 6

WM3- Control

Upstream of River Indus

836 763

842 400

Alternative location located at downstream 26m of the designated location

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– 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– 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

 

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

Portable Wind Speed Indicator

Testo Anemometer

 

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 6820/650MDS / YSI PRO20 Handheld Dissolved Oxygen Instrument /

YSI 550A Multifunctional Meter

pH meter

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

Turbidimeter

YSI Professional Plus / YSI 6820/650MDS / Hach 2100Q

Sample Container

High density polythene bottles (provided by laboratory)

Storage Container

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

 

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 or YSI 550A Multifunctional Meter 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 – 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 – 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 and 5 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 – 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 30 events of 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 – AM1a

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

8-Apr-15

61

1-Apr-15

10:25

82

72

59

14-Apr-15

82

9-Apr-15

14:24

255

248

216

20-Apr-15

50

13-Apr-15

11:18

116

106

108

25-Apr-15

68

18-Apr-15

12:36

68

66

69

30-Apr-15

59

24-Apr-15

10:49

139

81

93

 

29-Apr-15

10:50

98

84

98

Average

(Range)

64

(50-82)

Average

(Range)

114

(59 – 255)

 

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

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

8-Apr-15

103

1-Apr-15

10:18

75

64

54

14-Apr-15

139

9-Apr-15

14:13

238

233

246

22-Apr-15#

83

13-Apr-15

11:00

105

95

95

25-Apr-15

142

18-Apr-15

12:56

55

64

78

30-Apr-15

101

24-Apr-15

10:33

120

82

67

 

29-Apr-15

10:39

110

104

124

Average

(Range)

114

(83-142)

Average

(Range)

112

(54 – 246)

Remark: monitoring was changed from 20 Apr 2015 to 22 Apr 2015 due to power failure.

 

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

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

8-Apr-15

90

1-Apr-15

10:01

76

65

51

14-Apr-15

519

9-Apr-15

14:02

223

247

232

20-Apr-15

85

13-Apr-15

10:56

133

109

141

25-Apr-15

67

18-Apr-15

12:58

65

60

74

30-Apr-15

61

24-Apr-15

10:24

131

87

74

 

29-Apr-15

10:31

86

71

62

Average

(Range)

164

(64-519)

Average

(Range)

110

(51 – 247)

Remark: bold and underline value indicated Limit Level exceedance.

 

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

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

8-Apr-15

74

8-Apr-15

13:50

55

45

47

14-Apr-15

132

14-Apr-15

9:58

43

43

58

20-Apr-15

85

20-Apr-15

10:47

103

90

91

25-Apr-15

129

25-Apr-15

10:03

106

115

107

30-Apr-15

113

30-Apr-15

10:12

96

78

83

Average

(Range)

107

(73-132)

Average

(Range)

77

(43 – 115)

 

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

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

8-Apr-15

60

8-Apr-15

14:12

69

52

72

14-Apr-15

95

14-Apr-15

10:34

49

50

52

20-Apr-15

55

20-Apr-15

10:59

91

81

81

25-Apr-15

59

25-Apr-15

10:34

95

109

92

30-Apr-15

53

30-Apr-15

10:20

124

86

90

Average

(Range)

64

(53-95)

Average

(Range)

80

(49 – 124)

 

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

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

8-Apr-15

78

1-Apr-15

09:40

121

114

107

14-Apr-15

118

9-Apr-15

09:56

163

143

123

20-Apr-15

49

13-Apr-15

10:04

119

104

94

25-Apr-15

75

18-Apr-15

12:53

61

55

57

30-Apr-15

52

24-Apr-15

09:52

87

72

67

 

29-Apr-15

10:00

84

64

57

Average

(Range)

74

(52-118)

Average

(Range)

94

(55 - 163)

 

4.2.2                 As shown in Tables 4-1 to 4-6, all the 1-hour TSP monitoring results were below the Action/Limit Levels.  However, one Limit Level exceedance of 24-hour TSP was recorded at AM3 on 14 April 2015.  Notification of Exceedance (NOE) was issued to relevant parties upon confirmation of the monitoring result.  The investigation for cause of exceedance has been completed and the result is presented in below.

 

4.2.3                 According to the information provided by the Contractor (SRJV), the active construction activities on 14 April 2015 were conducted at the BCP area which about 400m away from AM3 and the works area in Lin Ma Hang Road which close to AM3 was idled.

 

4.2.4                 During the course of monitoring on 14 April 2015, it was observed that a covered soil stockpile was placed next to the HVS at AM3 and this stockpile was not belonged to the SRJV. As reported by our monitoring team and SRJV, construction of concrete slab for flag post was carried out right next to AM3 by other contractor in mid-April 2015.  On the other hand, no construction activities were observed for SRJV near AM3 and the adjoined Lin Ma Hang Road.

 

4.2.5                 During regular weekly site inspection by ET in April 2015, it was noted that the works area near AM3 and the adjoined Lin Ma Hang Road was idled.  Water bowser was arranged daily on the Lin Ma Hang Road as dust suppresser measures and the road surface was wetted.

 

4.2.6                 During site inspection on 30 April 2015, it was noted that the stockpile was removed but some construction waste was stored near AM3 by other contractor.  There were no exceedances recorded in the subsequent 24-hour TSP monitoring results on 20 and 25 April 2015.  Based on the above investigation, it is concluded that the exceedance was likely due to the works by other contractor and not related to the construction activities under Contract 5

 

4.2.7                 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 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 40 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

9-Apr-15

54

59

58

58

64

8-Apr-15

61

60

62

13-Apr-15

56

59

57

58

65

14-Apr-15

59

60

62

18-Apr-15

56

60

60

59

71

20-Apr-15

52

60

63

24-Apr-15

54

56

58

61

65

25-Apr-15

52

60

54

29-Apr-15

51

59

58

55

58

30-Apr-15

52

61

66

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 and 5 and water quality monitoring was performed at 5 relevant designated locations as below:

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

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

Ÿ    WM4 –South Portal of Contract 2 and Contract 3 working site downstream of Ma Wat Channel

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

Ÿ    WM4 – 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, construction work was carried out at South Portal of Contract 2 during public holiday between 3 to 7 April 2015 and therefore there were thirteen (13) sampling days for at the related water monitoring location WM4, WM4-Control A & WM4-Control B.  For WM1 and WM1-Control, eleven (11) sampling days of water quality monitoring was conducted

 

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

1-Apr-15

2.60

5.81

2.71

5.90

5.72

6.71

5.5

7.0

7.5

3-Apr-15

2.21

4.60

1.74

7.46

6.00

5.88

6.0

3.0

3.0

6-Apr-15

2.32

4.98

1.61

5.82

4.14

5.48

12.5

3.5

4.0

9-Apr-15

4.92

5.24

2.05

13.55

7.39

9.83

12.5

7.0

4.5

11-Apr-15

5.91

5.34

4.52

31.20

13.80

17.80

30.0

11.5

10.5

13-Apr-15

5.06

6.68

2.93

10.85

4.71

7.65

9.5

4.5

6.0

16-Apr-15

6.41

7.05

4.66

19.10

5.84

6.64

24.0

8.5

6.0

18-Apr-15

4.68

5.07

1.93

18.90

5.68

8.70

23.5

4.0

8.0

20-Apr-15

4.76

5.36

3.85

13.45

3.30

7.15

19.5

2.0

10.0

22-Apr-15

4.15

6.13

2.53

11.50

4.59

7.21

19.5

2.0

10.0

24-Apr-15

4.29

7.01

4.65

11.35

2.91

10.40

15.0

3.0

9.0

27-Apr-15

3.38

3.88

1.13

10.30

5.01

5.55

10.5

5.0

6.0

29-Apr-15

3.62

3.16

1.06

9.55

4.62

6.49

16.0

4.5

8.5

Remark: bold and underline value 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

#1-Apr-15

3.41

6.26

28.3

12.6

26.0

10.0

#9-Apr-15

1.61

4.55

116.5

195.5

76.5

93.0

11-Apr-15

6.84

8.21

605.5

864.5

263.0

374.5

#13-Apr-15

2.04

3.38

161.0

94.1

100.0

51.5

16-Apr-15

6.28

5.97

47.8

84.8

44.5

56.0

18-Apr-15

8.00

4.54

82.6

53.9

83.0

42.5

20-Apr-15

2.72

6.40

183.0

39.7

174.0

31.0

22-Apr-15

2.72

5.63

187.0

34.6

174.0

28.0

#24-Apr-15

6.01

6.60

97.5

34.8

104.0

21.0

#27-Apr-15

6.64

7.74

94.5

58.2

63.5

45.0

#29-Apr-15

7.86

6.72

45.1

33.0

17.0

24.0

Remark:

i.            bold and underlined indicated Limit Level exceedance.

ii.          bold and italic indicated Action Level exceedance

#   water sampling was not able to carry out due to shallow water and water monitoring was conducted at box culvert 2 downstream for reference

 

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

2

0

3

0

3

0

8

WM4

0

5

0

0

0

0

0

5

No of Exceedance

0

7

0

3

0

3

0

13

 

6.2.3                 During water monitoring on 1, 9, 13, 24, 27 and 29 April 2015, very shallow water was observed at the proposed water monitoring location and water sampling at WM1 was unable to carry out. To avoid missing of monitoring data, water sampling was carried out near the box culvert 2 at close downstream and the data is served as reference only.

 

6.2.4                 In this Reporting Period, there were five (5) exceedances of DO on 1, 3, 6, 27 and 29 April 2015 recorded at WM4.  For WM1, a total of eight (8) Limit Level exceedances were recorded, namely two (2) Limit Level exceedance of DO on 20 and 22 April 2015 and three (3) Limit Level exceedance of turbidity and SS on 18, 20 and 22 April 2015.

 

6.2.5                 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 DO Exceedance at WM1 on 20 and 22 April 2015

6.2.6                 According to the site information provided by the Contractor, formation work at BCPB, construction of retaining wall No.2a and construction of depressed road at BCP3 were conducted during 20 to 22 April 2015.  The active construction works were located at far upstream of WM1 and these construction activities did not disturb the water body and no water discharge was made into the existing channel.

 

6.2.7                 During of the water monitoring on 20 and 22 April 2015, large amount of algae growth was observed throughout the Kong Yiu channel especially at close upstream of WM1 during the exceedance day. Moreover, very slow water flow was observed near WM1 and the water was stagnant at a box culvert at downstream.

 

6.2.8                 It is considered that large amount of algae growing in the water body as well as slow water flow were the major factor resulting to low DO level.  Based on above investigation, it is concluded that the DO exceedances during 20 and 22 April 2015 were not related to the project.

 

Investigation Result for turbidity and SS Exceedance at WM1 on 18, 20 and 22 April 2015

6.2.9                 According to the site information provided by the Contractor, formation work at BCPB, construction of retaining wall No.2a and construction of depressed road at BCP3 were conducted during 18 to 22 April 2015.  The active construction works were located at far upstream of WM1 and these construction activities did not disturb the water body and no water discharge was made into the existing channel.

 

6.2.10             During the water monitoring on 18, 20 and 22 April 2015, very shallow water and slow water flow was observed at WM1. Moreover, large amount of algae was cumulated at WM1 due to slow water flow. Due to shallow water and presence of algae, the water sample collected at WM1 included the mixture of water and tiny pieces of algae.

 

6.2.11             In view of the unavoidable algae in the water sample, it is concluded that the turbidity and SS exceedances during 18 and 22 April 2015 were not related to the project.

 

Investigation Result for DO Exceedance at WM4 on 1, 3 and 6 April 2015 (Contract 2)

6.2.12             Site information was obtained from the Contractor of C2 (DHK), construction activities carried out at South Portal on 1, 3 and 6 April 2015 included site formation, hoarding erection, construction of site office and slope stabilization.  All works were carried out far from the river course and discharge was only made on 1 April 2015.

 

6.2.13             As advised by DHK, visual checking for discharge quality will be carried out when there is discharge needs to be made.  According to the self-checking result on 1 April 2015, the water quality performance was satisfactory. There were no discharge made on 3 and 6 April 2015, thus no test was carried out.

 

6.2.14             During weekly site inspection by the ET on 1 April 2015, it was observed the wastewater generated from works was treated by the onsite wastewater treatment system and treated water was recycled for further use such as wheel washing.  No adverse impact on water quality was observed on 1 April 2015.

 

6.2.15             According to the photo record provided by the other party on 1 April 2015, muddy water flowed from outside site boundary was observed. The muddy water deteriorated the existing stream water and affected the water quality at the downstream.

 

6.2.16             Moreover, low DO levels were recorded at upstream control station WM4-CB during the exceedance days. It is considered that the exceedances were likely due to natural variation and not related to the works under Contract 2.

 

Investigation Result for DO Exceedance at WM4 on 1, 3 and 6 April 2015 (Contract 3)

6.2.17             There was site closed during 3 to 7 April 2015 and site information was obtained from the Contractor on 1 April 2015 only in this investigation.  According to the site dairy provided by the Contractor, construction works carried out on 1 April 2015 included excavation, backfilling, concreting, erect of formwork and welding. These works did not disturb the water environment and comprised none of DO depleting characteristics. 

 

6.2.18             Daily inspection for wastewater treatment facilities within the site area was conducted by the Contractor, when there is water discharge observed, visual test would be carried out to check the performance of discharge and the surrounding environment.  According to the inspection record on 1 April 2015, muddy water flowed from outside site boundary was observed near WWTS NO.9. The external muddy water deteriorated the existing stream water and affected the water quality at the downstream.  Moreover, low DO levels were recorded at upstream control station WM4-CB during the exceedance days as well.

 

6.2.19             It was noted that exceedance of DO was recorded at WM4 even the site was closed on 3 and 6 April 2015.  Therefore, it is considered that the exceedances during 1, 3 and 6 April 2015 were likely due to natural variation and not related to the works under Contract 3.

 

Investigation Result for DO Exceedance at WM4 on 27 and 29 April 2015 (Contract 2)

6.2.20             According to the site information provided from the Contractor of C2 (DHK), construction activities carried out at South Portal on 27 and 29 April 2015 included tunnel excavation, spoil transportation, slope stabilization and construction of site office.  All works were far from the river and no discharges were made on 27 and 29 April 2015.

 

6.2.21             During weekly site inspection by the ET on 29 April 2015, it was observed that the wastewater generated from works was treated by the onsite wastewater treatment system and treated water was recycled for further use such as wheel washing.  No adverse impact on water quality was observed on 29 April 2015.

 

6.2.22             According to the photo record provided by the other party on 27 and 29 April 2015, muddy water flowed from outside site boundary was observed. The muddy water may deteriorate the existing stream water and affecting the water quality at the downstream.

 

6.2.23             Moreover, lower DO levels were recorded at upstream control station WM4-CB on 27 and 29 April 2015 as well. It is considered that the exceedances were likely due to natural variation and not related to the works under Contract 2

 

.Investigation Result for DO Exceedance at WM4 on 27 and 29 April 2015 (Contract 3)

6.2.24             According to the site diaries provided by the Contractor, construction works carried out on 27 and 29 April 2015 included excavation, installation and uninstallation of sheet pile, erecting of formwork, welding, concreting and soil compact. The abovementioned works were carried out away from the watercourse and comprised none of DO depleting characteristics. 

 

6.2.25             Inspection of the wastewater treatment facilities and the surrounding environment was conducted by the Contractor on 27 and 29 April 2015.  Water sample was collected at the discharge point for visual test in order to check the performance of discharge.  According to the inspection record on 27 and 29 April 2015, muddy water flowed from outside site boundary was observed near WWTS NO.9.  The external muddy water may deteriorate the existing stream water and affecting the water quality at the downstream. 

 

6.2.26             It was also noted that lower DO levels were recorded at upstream control station WM4-CB on 27 and 29 April 2015.  Therefore, it is considered that the exceedances on 27 and 29 April 2015 were likely due to natural variation and not related to the works under Contract 3.

 

 

 

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

Total Quantity

Quantity

Disposal Location

Quantity

Disposal Location

Quantity

Disposal Location

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

49.2330

--

3.597

--

0

--

52.83

Reused in this Project (Inert)

(in '000 m3)

0.2770

--

2.308

--

0

--

2.585

Reused in other Projects (Inert)

(in '000 m3)

48.7494

C5

0

--

0

--

48.7494

Disposal as Public Fill (Inert)

(in '000 m3)

0.2066

Tuen Mun 38

1.289

Tuen Mun 38

0

--

1.4956

 

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

Type of Waste

Contract 2

Contract 3

Contract 5

Total Quantity

Quantity

Disposal Location

Quantity

Disposal Location

Quantity

Disposal Location

Recycled Metal (‘000kg) #

0

-

2.767

Licensed collector

0

--

2.767

Recycled Paper / Cardboard Packing (‘000kg) #

0.2300

Licensed collector

0

-

0

--

0.2300

Recycled Plastic (‘000kg) #

0

-

0

-

0

--

0

Chemical Wastes (‘000kg) #

0

-

0

-

0

--

0

General Refuses (‘000m3)

0.2278

NENT

0.065

NENT

0.04

NENT

0.3328

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

The 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 1, 10, 17, 24 and 29 April 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

1 April 2015

Ÿ  Stagnant water cumulated inside the pit near the site exit was observed. The contractor should drain the water away to prevent mosquito breeding. (Mid-Vent)

Ÿ  DHK sprayed larvicide to the described location in order to prevent mosquito breeding.

Ÿ  Water spraying should be applied for excavating / breaking / drilling activities to minimize dust generation. (South Portal)

Ÿ  Not required for reminder

10 April 2015

Ÿ  Oil drums without drip tray was observed. The contractor should provide drip tray underneath. (Mid-Vent and North Portal)

Ÿ  The oil drums were removed.

Ÿ  Stagnant water cumulated inside the lifting eye of the concrete block was observed. The contractor should be clear the water to prevent mosquito breeding. (Mid-Vent and South Portal)

Ÿ  The lifting eyes were filled with sand.

Ÿ  Stagnant water cumulated inside the drip tray was observed. The contractor should drain the water away and the waste water should be disposed as chemical waste. (North Portal)

Ÿ  Stagnant water removed and provided with tarpaulin to cover well.

Ÿ  Chemical waste storage inside the chemical storage area was observed. The contractor should separate storage the chemical and chemical waste. (South Portal)

Ÿ  To be followed in next reporting month.

Ÿ  It was reminded that water spraying should be applied for breaking activities to reduce dust impact. (South Portal)

Ÿ  Not required for reminder

17 April 2015

Ÿ  As a reminder, water spraying frequency should be increase for the haul road to minimize dust generation. (South Portal & North Portal)

Ÿ  Not required for reminder

24 April 2015

Ÿ  Construction material cumulated inside the tree protection zone was observed. The contractor should remove the material to prevent damage of the retain tree. (South Portal )

Ÿ  The construction material inside the tree protection zone were relocated.  The tree protection zone were removed as the trees inside are felled.

Ÿ  Broken water barriers was observed along the site entrence. The contractor should prevent stagnant water cumulated inside the barrier to cause mosquito breeding. (South Portal )

Ÿ  Openings of water barriers are covered to avoid mosquito breeding inside.

Ÿ  Contractor was reminded to provide tarpaulin to cover the free standing oil drums to prevent stagnant water cumulated inside the drip tray. (South Portal )

Ÿ  Not required for reminder

29 April 2015

Ÿ  Waste skip and rubbish bin was observed full. The contractor was reminded to clean more frequency. (South Portal )

Ÿ  Not required for reminder

 

The 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 8, 15, 20 and 27 April 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

8 April 2015

Ÿ  Old version EP display at the site exit was observed, the Contractor should update the EP and display at the site exit.

Ÿ  Updated EP has been displayed at the site exit.

15 April 2015

Ÿ  C&D materials next to the retained tree was observed at SA11, the Contractor should remove the C&D materials and provide protection fence for the retained tree.

Ÿ  The C&D materials was removed and protection fence was provided.

Ÿ  Chemical drums without drip tray was observed at SA11, the Contractor should remove them and prevent leakage of chemical.

Ÿ  The chemical drums without drip tray was removed from site.

Ÿ  The Contractor was reminded to provide label for all trees within the site area.

Ÿ  Not required for reminder.

20 April 2015

Ÿ  Oil stain was observed at Bridge E, the Contractor was reminded to remove the oil stain and treat properly as chemical waste

Ÿ  The oil stain has been cleared up and the stained soil was stored as chemical waste storage area for proper disposal

27 April 2015

Ÿ  Oil drum placed above an air compressor was observed at FH9, the Contractor should remove the oil drum and store it at proper area.

Ÿ  Not required for reminder.

 

8.2.5                 Furthermore, the Contractor of Contract 3 was reminded to provide water spraying during dusty works, such as breaking and excavation.

 

The Contract 5

8.2.6                 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, 9, 16, 23 and 30 April 2015.  No non-compliance was noted.

 

8.2.7                 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 April 2015

Ÿ  Dry haul road at LMH site office was observed, water spraying should be provided to minimize dust generation.

Ÿ  Water spraying on the haul road at LMH site office was provided.

9 April 2015

No environmental issue was observed during the site inspection.

NA

16 April 2015

Ÿ  Free standing chemical containers of LMH site office was observed and leakage was also found. The Contractor should provide drip tray for chemical container and to remove the oil stain.

Ÿ  The chemical containers were removed and the oil stain was cleaned.

23 April 2015

Ÿ  Dusty materials at the site entrance/exit in LMH site office was observed, the Contractor should ensure that the vehicles are washed before leaving the site and clean the public road regularly.

Ÿ  Regular washing on the public road was provided and no dusty trails were observed.

Ÿ  As a reminder, the Contractor should review the condition of their temporary drainage system during the rainy season.

Ÿ  Not required for reminder

Ÿ  As a reminder, any dusty stockpile should be covered with impervious sheeting to minimize dust generation.

Ÿ  Not required for reminder

30 April 2015

No environmental issue was observed during the site inspection.

NA

 

8.2.8                 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

8.2.9                 Since the construction works at the Contract 4 and Contract 6 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 complaint, summons and prosecution under the EM&A Programme was lodged for Contracts 2, 3 and 5.

 

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 –

31 Mar 2015

Contract 2

0

11

Ÿ  (4) Water Quality

Ÿ  (5) Construction Dust

Ÿ  (2) Noise

06 Nov 2013 –

31 Mar 2015

Contract 3

0

3

Ÿ  (1) Construction Dust

Ÿ  (2) Water quality

16 Aug 2013 –

31 Mar 2015

Contract 5

0

2

Ÿ  (2) Construction Dust

1 – 30 Apr 2015

Contract 2

0

11

Ÿ  (4) 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

 

Table 9-2           Statistical Summary of Environmental Summons

Reporting Period

Contract No

Environmental Summons Statistics

Frequency

Cumulative

Complaint Nature

19 May 2014 –

31 Mar 2015

Contract 2

0

0

NA

06 Nov 2013 –

31 Mar 2015

Contract 3

0

0

NA

16 Aug 2013 –

31 Mar 2015

Contract 5

0

0

NA

1 – 30 Apr 2015

Contract 2

0

0

NA

Contract 3

0

0

NA

Contract 5

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 –

31 Mar 2015

Contract 2

0

0

NA

06 Nov 2013 –

31 Mar 2015

Contract 3

0

0

NA

16 Aug 2013 –

31 Mar 2015

Contract 5

0

0

NA

1 – 30 Apr 2015

Contract 2

0

0

NA

Contract 3

0

0

NA

Contract 5

0

0

NA

 

The Other Contracts

9.1.3                 Since the construction works at the Contract 4 and Contract 6 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 and 5 in this Reporting Period are summarized in Table 10-1.  

 

Table 10-1         Environmental Mitigation Measures

Issues

Environmental Mitigation Measures

Water Quality

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

Air Quality

·       Maintain damp / wet surface on access road

·       Keep slow speed in the sites

·       All vehicles must use wheel washing facility before off site

·       Sprayed water during breaking works

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

Noise

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

·       Keep good maintenance of plants

·       Place noisy plants away from residence or school

·       Provide noise barriers or hoarding to enclose the noisy plants or works

·       Shut down the plants when not in used.

Waste and Chemical Management

·       On-site sorting prior to disposal

·       Follow requirements and procedures of the “Trip-ticket System”

·       Predict required quantity of concrete accurately

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

General

·       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    Tunnel excavation

Ÿ    Cavern excavation

North Portal

Ÿ    Permanent slope formation

Ÿ    Conveyor Belt System Construction for RBM (remaining)

Ÿ    South Bound Tunnel Bench Excavation (remaining)

Ÿ    South Bound TBM Tunneling works (sliding to face, TBM launch, TBM DT)

Ÿ    Slab Cradle for TBM Shifting way

Ÿ    North Bound Top heading excavation (canopies)

Ÿ    North Bound Tunnel Blast door installation

South Portal

Ÿ    Temporary Slope Cut with Soil Nails Installation

Ÿ    3rd Wetsep Delivery plus Testing and Commissioning

Ÿ    Rock excavation to Ventilation Building Formation

Ÿ    South Bound Foundation Works

Ÿ    North Bound Bored Piles Works & Pile tests

Admin Building

Ÿ    Backfilling for surcharge

Ÿ    Demolition of existing building

 

Contract 3

Ÿ   Cable detection and trial trenches

Ÿ   Catch fence erection

Ÿ   Decking construction for Bridge E

Ÿ   Diversion of DN1400 watermain deck construction of Bridge E

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

Ÿ   Filling works at Tong Hang East

Ÿ   Lagging wall for bored pile wall

Ÿ   Laying storm drains

Ÿ   Noise barrier construction

Ÿ   Pier construction

Ÿ   Pier table construction

Ÿ   Pile cap works

Ÿ   Pre-drilling works and piling works for viaduct

Ÿ   Road works at Fanling Highway

Ÿ   Sewer works at Tai Wo Service Road West (TWSRW)

Ÿ   Socket H-pile load test

Ÿ   Tree felling works

Ÿ   Utilities duct laying

Ÿ   Viaduct segment erection

Ÿ   Waterworks

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 retaining wall no. 2a

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   Installation of precast parapet and vehicular railing at Bridge J

Ÿ   Construction of Depressed Road at BCP3

Ÿ   Filling work for ArchSD permanent office

Ÿ   Drainage works at proposed and 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

 

10.3                   Key Issues for the Coming Month

10.3.1             Key issues to be considered in the coming month for Contracts 2, 3 and 5 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 and Contract 6 have not yet commenced and no environmental issue is presented.


11                         Conclusions and Recommendations

11.1                   Conclusions

11.1.1             This is 21st monthly EM&A report presenting the monitoring results and inspection findings for the Reporting Period from 1 to 30 April 2015.

 

11.1.2             For air quality monitoring, no 1-hour TSP monitoring results triggered the Action or Limit Levels were recorded but there was 1 Limit level exceedance of 24-hour TSP recorded at AM3 on 14 April 2015.  The investigation for the cause of exceedance is underway by the ET.

 

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, there were five (5) exceedances of DO on 1, 3, 6, 27 and 29 April 2015 recorded at WM4.  For WM1, a total of eight (8) Limit Level exceedances were recorded, namely two (2) Limit Level exceedance of DO on 20 and 22 April 2015 and three (3) Limit Level exceedance of turbidity and SS on 18, 20 and 22 April 2015. The investigation for the cause of exceedance was completed and submitted to relevant parties.

 

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 and 5.

 

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

 

11.1.7             During the Reporting Period, five (5), four (4) and five (5) events of joint site inspection by the RE, IEC, ET with the relevant Main-contractor were carried out for Contracts 2, 3 and 5 respectively in accordance with the EM&A Manual stipulation.  No non-compliance observed during the site inspection. 

 

11.2                   Recommendations

11.2.1             During wet season, muddy water or other water pollutants from site surface runoff into Kong Yiu Channel and Ma Wat Channel will be key environment issue.  Water quality mitigation measures to prevent surface runoff into nearby water bodies and public areas should be paid on special attention.  The Contractors should fully implement the water quality mitigation measures.

 

11.2.2             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.

 

11.2.3             Since most of construction sites under the Project are adjacent to villages, the contractors should be paid attention on the construction dust emission.  The Contractor should fully implement the construction dust mitigation measures properly.

 

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.