Job No.: TCS00670/13

 

 

 

 

 

 

 

 

 

Agreement No. CE 45/2008 (CE)

Liantang/Heung Yuen Wai

Boundary Control Point and Associated Works

 

 

 

 

 

 

 

 

 

7th Quarterly Environmental Monitoring & Audit Summary Report –

(February to April 2015)

 

 

 

 

 

Prepared For

 

 

 

 

 

Civil Engineering and Development Department (CEDD)

 

 

 

 

 

 

 

 

 

Quality Index

Date

Reference No.

Prepared By

Certified By

15 June 2015

TCS00670/13/600/R0382v2

Nicola Hon

(Environmental Consultant)

T.W. Tam

(Environmental Team Leader)

 

 

 

Version

Date

Description

1

2 June 2015

First Submission

2

15 June 2015

Amended against IEC comment on 12 June 2015

 

 

 

 

 

 

This report has been prepared by Action-United Environmental Services & Consulting with all reasonable skill, care and diligence within the terms of the Agreement with the client, incorporating our General Terms and Conditions of Business and taking account of the resources devoted to it by agreement with the client. We disclaim any responsibility to the client and others in respect of any matters outside the scope of the above. This report is confidential to the client and we accept no responsibility of whatsoever nature to third parties to whom this report, or any part thereof, is made known. Any such party relies upon the report at their own risk.

 

Executive Summary

ES.01.   This is the 7th Quarterly EM&A Summary Report for the “Liantang/Heung Yuen Wai Boundary Control Point and Associated Works” under Environmental Permit No. EP-404/2011/C (hereinafter ‘‘the EP’’), covering the period from 1 February to 30 April 2015 (hereinafter “Reporting Period”).

 

Environmental Monitoring and Audit Activities

ES.02.   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

300

24-hour TSP

6

96

Construction Noise

Leq(30min) Daytime

8

128

Water Quality

Water sampling

Contract 3 (3)

37(*)

Contract 5 (2)

35(*)

Joint Site Inspection / Audit

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

Contract 2

13

Contract 3

13

Contract 5

13

            (*) number of sampling day

 

Breaches of Action/Limit levels

ES.03.   In the Reporting Period, no noise exceedances were registered but one (1) Limit Level exceedance was recorded for 24-hour TSP of air quality monitoring.  For water quality monitoring, a total of thirty-six (36) Action/ Limit Level exceedances including the parameter of DO, turbidity and SS were recorded at location WM1 and WM4.  The summary of breach of environmental performance is shown below.

 

Environmental Aspect

Monitoring Parameters

Action Level

Limit Level

Event & Action

NOE Issued

Investigation

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

28

28

Not project related

N/A

Turbidity

0

3

3

SS

1

4

5

 

Environmental Complaint

ES.04.   In this Reporting Period, no environmental complaints were received and lodged for Contracts 2, 3 and 5 related to the EM&A programme.

 

Notification of Summons and Successful Prosecutions

ES.05.   No environmental summons or successful prosecutions were recorded in the Reporting Period. 

 

Reporting Changes

ES.06.   No reporting changes were made in the Reporting Period.

 

Future key issues

ES.07.   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.  

 

ES.08.   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.

 

ES.09.   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.

 

ES.10.   To control the site performance on waste management, the Contractor shall ensure that all solid and liquid waste management works are fully in compliance with the relevant license/permit requirements, such as the effluent discharge license and the chemical waste producer registration.  The Contractor is also reminded to implement the recommended environmental mitigation measures according to the Environmental Monitoring and Audit Manual.

 

Table of Contents

1         Introduction   1

1.1          Project Background   1

1.2          Report Structure  1

2         Project Organization and Construction progress  2

2.1          Construction Contract Packaging   2

2.2          Project Organization   3

2.3          Concurrent Projects  5

2.4          Construction Progress  5

2.5          Summary of Environmental Submissions  7

3         Project Organization and Construction progress  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          Summary of Monitoring Results  19

5         Construction Noise Monitoring   21

5.1          General  21

5.2          Summary of Monitoring Results  21

6         Water Quality Monitoring   23

6.1          General  23

6.2          Summary of Monitoring Results  23

7         Waste Management   25

7.1          General Waste Management  25

7.2          Records of Waste Quantities  25

8         Site Inspections  26

8.1          requirements  26

9         Non-compliance, Complaints, Notifications of Summons and Successful Prosecutions  28

9.1          Non-compliance (exceedances) 28

9.2          Environmental Complaint, Summons and Prosecution   28

10      Implementation Status of Mitigation Measures  30

10.1        General Requirements  30

11       Conclusions and Recommendations  31

11.1        Conclusions  31

11.2        Recommendations  31

 

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 Air Quality Monitoring Results

Table 4-2      Summaries of Breaches of Air Quality A/L Levels

Table 5-1     Summary of Construction Noise Monitoring Results

Table 5-2      Summaries of Breaches of Construction Noise A/L Levels

Table 6-1      Summary of the Water Quality Monitoring Results – Contract 5

Table 6-2      Summary of the Water Quality Monitoring Results – Contract 3

Table 6-3      Summaries of Breaches of the Existing Water Quality A/L Levels

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

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

Table 8-1      Summary of Reminders/Observations of Site Inspection – Contract 2

Table 8-2      Summary of Reminders/Observations of Site Inspection – Contract 3

Table 8-3      Summary of Reminders/Observations of Site Inspection – 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 Annexes

Appendix A  Layout plan of the Project

Appendix B  Environmental Management Organization Chart

Appendix C  Master Construction Programme for the Contracts,

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

Appendix E  Monitoring Locations for Impact Monitoring

Appendix F   Event and Action Plan

Appendix G Graphical Plots for Monitoring Result

Appendix H Weather information

Appendix I  Waste Flow Table

Appendix J  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. 

 

1.1.5.      This is the 7th Quarterly EM&A Summary Report for the “Liantang/Heung Yuen Wai Boundary Control Point and Associated Works” under Environmental Permit No. EP-404/2011/C, covering the period from 1 February 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       Non-compliance, Complaints, Notifications of Summons and Successful Prosecutions

Section 9       Implementation Status of Mitigation Measures

Section 10     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 (NE/2014/02)

2.1.5        The works of Contract 4 are scheduled to commence in the 3rd quarter of 2015.  The work of this Contract 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 has not yet awarded.  Major Scope of Work of the Contract 6 will 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;

                        (b)          Building works and road works by contractors of ArchSD;

                         (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 Contract 2, Contract 3 and Contract 5.  They are summarized in below.  Moreover, the master construction program of the Contract 2, Contract 3 and Contract 5 is enclosed in Appendix C.

 

Contract 2 (CV/2012/08)

2.4.2        Construction work of Contract 2 was commenced on 19 May 2014, the following activities were conducted in the Reporting Period.

Ÿ  North Portal:

Ÿ    Sub-station construction

Ÿ    Permanent slope formation (soil nailing works)

Ÿ    Spoil basin and conveyor belt system construction

Ÿ    Top heading excavation (canopies) for Southbound

Ÿ    Platform excavation for South bound tunnel bench excavation

Ÿ    TBM Site Installation (site formation works, back up cradle, spoil basin, water treatment system installation, slab concreting, tower crane foundation)

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

Ÿ  Mid Vent Portal:

Ÿ    Sub-station construction and CLP installation

Ÿ    Top heading canopies and bench excavation

Ÿ    Full face excavation

Ÿ  South Portal:

Ÿ    Sub-station construction and CLP installation

Ÿ    Slope stabilization and site installation

Ÿ    Site formation and tree felling works

Ÿ    Temporary Slope Cut with Soil Nails Installation

Ÿ    2nd Wetsep Delivery + testing and commissioning

Ÿ  Admin Building:

Ÿ    Preparation works for surcharge backfilling

Ÿ    Backfilling for surcharge

Ÿ    Drainage works

Ÿ    Site hoarding

 

Contract 3 (CV/2012/09)

2.4.3        Contract commenced in November 2013, the following activities were conducted in the Reporting Period.

Ÿ  Cable detection and trial trenches

Ÿ  Box Culvert inlet structure

Ÿ  Cable detection and trial trenches

Ÿ  Erection of temporary support at DSD nullah for Bridge E

Ÿ  Filling Works at Tong Hang East

Ÿ  Lagging wall and capping beam for bored pile wall

Ÿ  Lay storm drains

Ÿ  Diversion of DN600

Ÿ  Pier construction

Ÿ  Pile cap works

Ÿ  Piling works

Ÿ  Road works at Fanling Highway

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

Ÿ  Socket H-pile load test

Ÿ  Utilities duct laying

Ÿ  Viaduct segment erection

Ÿ  Waterworks

Ÿ  Tree felling works

Ÿ  Abutment construction for Bridge E

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

Ÿ  Noise barrier construction

Ÿ  Pre-drilling

Ÿ  Catch fence erection

Ÿ  Demolition of central divider at Fanling Highway

Ÿ  Pier table construction

 

Contract 4 (NE/2014/02)

2.4.4        The contract has not yet awarded.

 

Contract 5 (CV/2013/03)

2.4.5        Contract commenced in August 2013, the following activities were conducted in the Reporting Period.

Ÿ  Bituminous laying at proposed Lin Ma Hang (LMH) road

Ÿ  Construction of Western pedestrian subway and pump room at LMH

Ÿ  Deck construction works at Bridge J

Ÿ  Construction of chain link fence and trapezoidal channel at BCPA

Ÿ  Construction of retaining wall No.5

Ÿ  Drainage works at existing / proposed Lin Ma Hang Road

Ÿ  Drainage works at BCP area

Ÿ  Water works at existing / proposed Lin Ma Hang Road

Ÿ  Formation Works at BCP Area

Ÿ  Pruning/ felling/ transplanting of existing tree

Ÿ  Soil cement slope along BCP Area.

Ÿ  Installation of underground utilities at proposed LMH road.

Ÿ  Road works (kerb laying) for proposed LMH Road

Ÿ  Utility laying (132kV & 11kV) at existing LMH road

Ÿ  Preparation works for additional rising main at Lin Ma Hang (LMH) road

Ÿ  Construction of secondary boundary fencing

Ÿ  Construction of Depressed Road at BCP3

Ÿ  Construction of retaining wall No.2b

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

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

Ÿ  Transplanting of trees at BCP4

Ÿ  Laying additional rising mains at LMH road

Ÿ  Parapet installation at Bridge J

 

Contract 6 (CV/2013/08)

2.4.6        The contract has not yet 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-RN0485-14

Valid on 7 Aug 2014 till 5 Feb 2015

GW-RN0810-14

Valid on 4 Jan 2015 till 15 Feb 2015

GW-RN0022-15

Valid on 25 Jan 2015 till 22 Feb 2015

GW-RN0684-14

Valid on 16 Nov 2014 till 26 Apr 2015

GW-RN0045-15

Valid on 31 Jan 2015 till 28 Feb 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                    Project Organization and Construction progress

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 Rpad

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. 78

Fanling

Contract 3

 

Table 3-4             Impact Monitoring Stations - Water Quality

Station ID

Description

Designated / Alternative Location

Nature of the location

Related to the Work Contract

Coordinates

Easting

Northing

WM1

Downstream of Kong Yiu Channel

833679

845421

Alternative location located at upstream 51m of the designated location

Contract 5

WM1-Control

Upstream of Kong Yiu Channel

834185

845917

NA

Contract 5

WM2A

Downstream of River Ganges

834204

844471

Alternative location located at downstream 81m of the designated location

Contract 6

WM2A-Control

Upstream of River Ganges

835270

844243

Alternative location located at upstream 78m of the designated location

Contract 6

WM2B

Downstream of River Ganges

835433

843397

NA

Contract 6

WM2B-Control

Upstream of River Ganges

835835

843351

Alternative location located at downstream 31m of the designated location

Contract 6

WM3

Downstream of River Indus

836324

842407

NA

Contract 6

WM3-Control

Upstream of River Indus

836763

842400

Alternative location located at downstream 26m of the designated location

Contract 6

WM4

Downstream of Ma Wat Channel

833850

838338

Alternative location located at upstream 11m of the designated location

Contract 3

WM4–Control A

Kau Lung Hang Stream

834028

837695

Alternative location located at downstream 28m of the designated location

Contract 3

WM4–Control B

Upstream of Ma Wat Channel

833760

837395

Alternative location located at upstream 15m of the designated location

Contract 3

 

3.4              Monitoring Frequency and Period

3.4.1        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

3.4.2        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

3.4.3        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

3.4.4        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-Hour 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-1.

 

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-14 or Rion NL-31or 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:

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

•            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

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

Turbidimeter

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

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 Thermo Andersen Model GS2310 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 were 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 were used as the monitoring parameter for the time period between 0700-1900 hours on weekdays; and also Leq(15min) in three consecutive Leq(5min) measurements is 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 was 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    Instrument including YSI Professional Plus or YSI 6820/650MDS or 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.  Before each round of monitoring, the dissolved oxygen probe would be calibrated by the wet bulb method.

 

3.6.15    A portable AZ8685 pH pen-style meter or YSI Professional Plus or YSI 6820/650MDS 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 or YSI Professional Plus or YSI 6820/650MDS is used for in-situ turbidity measurement. The turbidity meter is capable of measuring turbidity in the range of 0 – 1000 NTU.  StablCal® Standards of known NTU are used for calibration of the instrument before and after measurement.

 

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 are analyzed with Suspended Solids (SS) as specified in the EM&A Manual by a local HOKLAS-accredited testing laboratory (ALS Technichem (HK) Pty Ltd HOKLAS registration no. 66).  SS analysis is determined by the laboratory upon receipt of the water samples using APHA Standard Methods 2540D (namely ALS Method EA-025 as accredited HOKLAS Scheme) started 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 is 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 presented in the relevant monthly EM&A reports.  

 

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

AM1/ AM1a

265

143

500

260

AM2

268

149

AM3

269

145

AM4a

267

148

AM5

268

143

AM6

269

148

AM7a / AM7b

275

156

AM8

269

144

AM9a / 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) and 65 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 F.

 

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 properly 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

 

4.2              Summary of Monitoring Results

4.2.1        Summary of air quality monitoring results during the Reporting Period are tabulated in Table 4-1.  The relevant graphical plots throughout the Reporting Period are presented in Appendix G.

Table 4-1            Summary of Air Quality Monitoring Results

Monitoring Location

1-hour TSP (µg/m3)

24-hour TSP (µg/m3)

Max

Min

Mean

Max

Min

Mean

AM1a

262

24

116

132

38

66

Record Date

17-Feb-15

12-Mar-15

51 events

9-Feb-15

24-Feb-15

16 events

(1 failure)

AM2

261

23

118

142

46

99

Record Date

17-Feb-15

12-Mar-15

51 events

25-Apr-15

24-Feb-15

16 events

(1 failure)

AM3

262

21

108

519

30

99

Record Date

7-Feb-15

12-Mar-15

51 events

14-Apr-15

13-Mar-15

16 events

(1 failure)

AM7b

260

43

122

148

72

107

Record Date

9-Feb-15

14-Apr-15

48 events

14-Feb-15

7-Mar-15

16 events

AM8

231

46

110

122

30

63

Record Date

7-Mar-15

31-Mar-15

48 events

9-Feb-15

31-Mar-15

16 events

AM9b

255

34

116

146

30

77

Record Date

17-Feb-15

12-Mar-15

51 events

9-Feb-15

31-Mar-15

16 events

(1 failure)

 

4.2.2        Breaches of air quality A/L levels and statistical analysis of compliance for the air quality monitoring results are summarized in Table 4-2.

Table 4-2             Summaries of Breaches of Air Quality A/L Levels

Location

Exceedance

1-hour TSP

24- hour TSP

Total

AM1

Action Level

0

0

0

Limit Level

0

0

0

AM2

Action Level

0

0

0

Limit Level

0

0

0

AM3

Action Level

0

0

0

Limit Level

0

1

1

AM7b

Action Level

0

0

0

Limit Level

0

0

0

AM8

Action Level

0

0

0

Limit Level

0

0

0

AM9b

Action Level

0

0

0

Limit Level

0

0

0

 

4.2.3        In the Reporting Period, no exceedances were recorded for 1-hour TSP. However, one (1) Limit Level exceedances for 24-hour TSP was recorded in April 2015.  According to investigation result, it was concluded that the exceedance was not due to the works under the project. The detailed investigation findings have been presented in the relevant monthly EM&A reports.

 

4.2.4        The summary of weather conditions during the Reporting Period is presented in Appendix H.

 

 

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

 

5.2              Summary of Monitoring Results

5.2.1        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.  No façade correction (+3 dB(A) is added according to acoustical principles and EPD guidelines.  However, free-field status is performed at NM10 and façade correction (+3 dB(A) has added according to the requirement.

 

5.2.2        Summary of noise monitoring results during the Reporting Period are tabulated in Table 5-1.  The relevant graphical plots throughout the Reporting Period are presented in Appendix G.

Table 5-1            Summary of Construction Noise Monitoring Results

Monitoring Location

Leq, 30min (dB((A))

Max

Min

NM1

60

47

Record Date

30-Mar-15

23-Feb-15

NM2

67

55

Record Date

17-Feb-15

23-Feb-15

NM5

68

46

Record Date

14-Feb-15

25-Mar-15

NM6

64

59

Record Date

3 and 6 Feb-15

24-Feb-15

NM7

71

54

Record Date

3-Feb-15

25-Apr-15

NM8

62

55

Record Date

12-Mar-15

2-Feb-15

NM9

65

55

Record Date

13-Feb-15

29-Apr-15

NM10(*)

75

58

Record Date

18-Mar-15

29-Apr-15

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

 

5.2.3        Breaches of construction noise A/L levels and statistical analysis of compliance for construction noise monitoring results are summarized in Table 5-2.

 

 

Table 5-2             Summaries of Breaches of Construction Noise A/L Levels

Station

Limit Level

Action Level

Received Date

NM1

0

0

NA

NM2

0

NM5

0

NM6

0

NM7

0

NM8

0

NM9

0

NM10

0

 

5.2.4        In this Reporting Period, the noise level measured at the eight (8) designated monitoring locations 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, water quality monitoring was performed at 5 designated locations which related the Contract 3 and Contract 5 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 – Contract 3 working site Downstream of Ma Wat Channel;

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

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

 

6.2              Summary of Monitoring Results

6.2.1        Summary of monitoring results during the Reporting Period are tabulated in Tables 6-1 and 6-2.  The relevant graphical plots throughout the Reporting Period are presented in Appendix G.

 

Table 6-1             Summary of the Water Quality Monitoring Results – Contract 5

Statistics

DO (mg/L)

Turbidity (NTU)

SS (mg/L)

WM1

WM1- Control

WM1

WM1- Control

WM1

WM1- Control

Min

0.18

3.38

8.6

10.5

6

3

Max

8

11.26

605.5

864.5

263

374.5

Average

3.01

7.28

61.41

63.47

43.06

32.21

 

Table 6-2             Summary of the Water Quality Monitoring Results – Contract 3

Statistics

DO (mg/L)

Turbidity (NTU)

SS (mg/L)

WM4

WM4 - CA

WM4 - CB

WM4

WM4 - CA

WM4 - CB

WM4

WM4 - CA

WM4 - CB

Min

2.21

3.16

1.06

5.82

2.91

5.2

5.5

<2

3

Max

7.58

8.68

7.49

34.1

32.7

35.1

48

22.5

16

Average

4.96

6.54

3.65

20.85

10.76

12.84

20.72

6.08

8.20

Noted:

WM4-CA = WM4-Control A; WM4-CB = WM4-Control B

 

6.2.2        Breaches of water quality A/L levels and statistical analysis of compliance for the water quality monitoring results are summarized in Tables 6-3.

Table 6-3             Summaries of Breaches of the Existing Water Quality A/L Levels

Reporting Period

No. of sampling day

Location

DO (mg/L)

Turbidity (NTU)

SS (mg/L)

Action

Limit

Action

Limit

Action

Limit

Feb-15

11

WM1

0

7

0

0

0

0

WM4

0

0

0

0

0

0

Mar-15

13

WM1

0

11

0

0

1

0

WM4

0

3

0

0

0

1

Apr-15

11

WM1

0

2

0

3

0

3

13

WM4

0

5

0

0

0

0

Total

35

WM1

0

20

0

3

1

3

37

WM4

0

8

0

0

0

1

 

In the Reporting Period, a total of thirty six (36) Action/ Limit Level exceedances namely 28 exceedances of DO, 3 exceedances of turbidity and 5 exceedances of SS were recorded.  NOEs were issued to relevant parties upon confirmation of the results.  According to investigation result, it was concluded that the exceedances were not due to the works under the project. The detailed investigation findings have been presented in the relevant monthly EM&A reports.

 

6.2.3        The summary of weather conditions during the Reporting Period is presented in Appendix H. 

 

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

 

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

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

Type of Waste

Contract

No

Quantity

Disposal Location

Feb 15

Mar 15

Apr 15

Total

C&D Materials (Inert)

(in '000m3)

2

57.998

66.0198

49.233

182.989

-

3

2.429

3.713

3.597

-

5

0

0

0

-

Reused in this Project (Inert)

(in '000m3)

2

0

0.3614

0.277

4.7344

 

3

1.518

0.27

2.308

-

5

0

0

0

-

Reused in other Projects (Inert)

(in '000m3)

2

57.3858

65.3359

48.7494

171.4711

C5

3

0

0

0

-

5

0

0

0

-

Disposal as Public Fill (Inert)

(in '000m3)

2

0.6121

0.3225

0.2066

6.7842

Tuen Mun 38

3

0.911

3.443

1.289

Tuen Mun 38

5

0

0

0

-

 

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

Type of Waste

Contract

No

Quantity

Disposal Location

Feb 15

Mar 15

Apr 15

Total

Recycled Metal (‘000kg)

2

3.32

0

0

4.31

+

#2.767

By licensed collector

3

0

0

#2.767

5

0.99

0

0

Recycled Paper / Cardboard Packing (‘000kg)

2

0.39

0.292

0.23

0.912

By licensed collector

3

0

0

0

5

0

0

0

Recycled Plastic (‘000kg)

2

0

0

0

#0.009

By licensed collector

#3

0.003

0.006

0

5

0

0

0

Chemical Wastes (‘000kg)

2

0.528

0.704

0

1.232

+

#0.9

By licensed collector

3

#0.9

0

0

5

0

0

0

General Refuses (‘000m3)

2

0.0908

0.1293

0.2278

1.2579

NENT

3

0.07

0.08

0.065

5

0.18

0.375

0.04

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

 

7.2.3        To control the site performance on waste management, the Contractor shall ensure that all solid and liquid waste management works are fully in compliance with the relevant license/permit requirements, such as the effluent discharge license and the chemical waste producer registration.  The Contractor is also reminded to implement the recommended environmental mitigation measures according to the Environmental Monitoring and Audit Manual.

8                    Site Inspections

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.

 

Contract 2

8.1.2        During the Reporting Period, 13 events of the joint site inspections were undertaken at Contract 2 to evaluate the site environmental performance.  The summaries of the findings during site inspection are presented in Table 8-1 and the details of site inspection can be found in relevant EM&A monthly report.

Table 8-1             Summary of Reminders/Observations of Site Inspection – Contract 2

Reporting Period

Date of site inspection

Nos. of findings / reminders

Follow-Up Status

February 2015

6, 13, 16 and 27 February 2015

4

Completed

March 2015

6, 13, 19 and 27 March 2015

10

Completed

April 2015

1, 10, 17, 24 and 29 April 2015

12

Completed

 

8.1.3        In the Reporting Period, no non-compliance was recorded; however, 26 observations/ reminders were recorded during the site inspections.  Minor deficiencies found in the weekly site inspection were in general rectified within the specified deadlines.  The environmental performance of the Project was therefore considered satisfactory.

 

Contract 3

8.1.4        During the Reporting Period, 13 events of the joint site inspections were undertaken at Contract 3 to evaluate the site environmental performance.  The summaries of the findings during site inspection are presented in Table 8-2 and the details of site inspection can be found in relevant EM&A monthly report.

Table 8-2             Summary of Reminders/Observations of Site Inspection – Contract 3

Reporting Period

Date of site inspection

Nos. of findings / reminders

Follow-Up Status

February 2015

2, 11, 16 and 25 February 2015

6

Completed

March 2015

2, 11, 18, 23 and 30 March 2015

9

Completed

April 2015

8, 15, 20 and 27 April 2015

6

Completed

 

8.1.5        In the Reporting Period, no non-compliance was recorded; however, 21 observations/ reminders were recorded during the site inspections.  Minor deficiencies found in the weekly site inspection were in general rectified within the specified deadlines.  The environmental performance of the Project was therefore considered satisfactory.

 

Contract 5

8.1.6        During the Reporting Period, 13 events of the joint site inspections were undertaken at Contract 5 to evaluate the site environmental performance.  The summaries of the findings during site inspection are presented in Table 8-3 and the details of site inspection can be found in relevant EM&A monthly report.


Table 8-3        Summary of Reminders/Observations of Site Inspection – Contract 5

Reporting Period

Date of site inspection

Nos. of findings / reminders

Follow-Up Status

February 2015

5, 12, 17 and 26 February 2015

6

Completed

March 2015

5, 12, 20 and 26 March 2015

2

Completed

April 2015

2, 9, 16, 23 and 30 April 2015

5

Completed

 

8.1.7        In the Reporting Period, no non-compliance was recorded; however, 13 observations/ reminders were recorded during the site inspections.  Minor deficiencies found in the weekly site inspection were in general rectified within the specified deadlines.  The environmental performance of the Project was therefore considered satisfactory.

 

Other Contracts

8.1.8        Since the construction works at the Contract 4 and Contract 6 are not yet commenced, no site inspection is performed for these Contracts.

 

 

9                    Non-compliance, Complaints, Notifications of Summons and Successful Prosecutions

9.1              Non-compliance

9.1.1        No environmental non-compliance was recorded in the Reporting Period.

 

9.2              Environmental Complaint, Summons and Prosecution

9.2.1        In the Reporting Period, no environmental complaints, summons and prosecution under the EM&A Programme was lodged for Contracts 2, 3 and 5.

 

9.2.2        The statistical summary table of environmental complaint, summons and prosecution are presented in Tables 9-1, 9-2 and 9-3.

Table 9-1             Statistical Summary of Environmental Complaints

Contract No

Reporting Period

Environmental Complaint Statistics

Frequency

Cumulative since commencement of project

Complaint Nature

Water

Air

Noise

2

Feb 2015

0

11

0

0

0

Mar 2015

0

0

0

0

Apr 2015

0

0

0

0

3

Feb 2015

0

3

0

0

0

Mar 2015

0

0

0

0

Apr 2015

0

0

0

0

5

Feb 2015

0

2

0

0

0

Mar 2015

0

0

0

0

Apr 2015

0

0

0

0

 

Table 9-2             Statistical Summary of Environmental Summons

Contract No

Reporting Period

Environmental Summons Statistics

Frequency

Cumulative since commencement of project

Complaint Nature

Water

Air

Noise

2

Feb 2015

0

0

0

0

0

Mar 2015

0

0

0

0

Apr 2015

0

0

0

0

3

Feb 2015

0

0

0

0

0

Mar 2015

0

0

0

0

Apr 2015

0

0

0

0

5

Feb 2015

0

0

0

0

0

Mar 2015

0

0

0

0

Apr 2015

0

0

0

0

 

Table 9-3             Statistical Summary of Environmental Prosecution

Contract No

Reporting Period

Environmental Prosecution Statistics

Frequency

Cumulative since commencement of project

Complaint Nature

Water

Air

Noise

2

Feb 2015

0

0

0

0

0

Mar 2015

0

0

0

0

Apr 2015

0

0

0

0

3

Feb 2015

0

0

0

0

0

Mar 2015

0

0

0

0

Apr 2015

0

0

0

0

5

Feb 2015

0

0

0

0

0

Mar 2015

0

0

0

0

Apr 2015

0

0

0

0

 

9.2.3        Since the construction works at the Contract 4 and Contract 6 are not yet commenced, no environmental complaint, summons and prosecution are received in the Reporting Period accordingly.

 

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 J.

 

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 filtration systems i.e. sedimentation tank or   AquaSed before to 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.

 

11                Conclusions and Recommendations

11.1          Conclusions

11.1.1    This is the 7th Quarterly EM&A Summary Report presenting the monitoring results and inspection findings for the Reporting Period from 1 February to 30 April 2015.

 

11.1.2    For air quality monitoring, no exceedances were recorded for 1-hour TSP but one (1) Limit Level exceedances of 24-hour TSP recorded.  NOE was issued to relevant parties upon confirmation of the monitoring results. The investigation for the causes of exceedances was completed and it concluded that the exceedance was not related to works under the Project.

 

11.1.3    No construction noise measurement results that exceeded the Limit Level were recorded in the Reporting Period. However, two noise complaints (which is an Action Level exceedance) were registered for the Project and they were settled by the Contractor.

 

11.1.4    For water quality monitoring, a total of thirty six (36) Action/ Limit Level exceedances including the parameter of DO, turbidity and SS were recorded at location WM1 and WM4.  NOEs were issued to relevant parties upon confirmation of the results. The investigation for the causes of exceedances was completed and it concluded that the exceedances were not related to works under the Project.

 

11.1.5    During the Reporting Period, 13 events of joint site inspections for Contract 2, Contract 3 and Contract 5 were undertaken to evaluate the site environmental performance.  No adverse environmental impacts were observed during the weekly site inspection and environmental audit of the Reporting Period, indicating the implemented mitigation measures for air quality, construction noise and water quality were effective.  Minor deficiencies found in the weekly site inspection were in general rectified within the specified deadlines.  The environmental performance of the Project was therefore considered satisfactory.

 

11.1.6    In this Reporting Period, no environmental complaint, summons or successful prosecutions related to the EM&A programme were recorded.

 

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.