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.5) ¡V December 2013

 

 

 

 

 

 

 

 

Prepared For

 

 

 

 

Civil Engineering and Development Department (CEDD)

 

 

 

 

 

 

 

 

 

 

 

Date

Reference No.

Prepared By

Certified By

15 January 2014

TCS00670/13/600/R00111v1

Ben Tam

(Environmental Consultant)

Tam Tak Wing

(Environmental Team Leader)

 

Version

Date

Remarks

1

8 January 2014

First Submission

2

15 January 2014

Revised against RE requirement on 12 January 2014

 

 

 

 

 

 


executive summary

ES01            This is the 5th monthly EM&A report presenting the monitoring results and inspection findings for the reporting period from 1 to 31 December 2013 (hereinafter ¡¥the Reporting Period¡¦).

 

Environmental Monitoring and Audit Activities

ES02            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

4

60

24-hour TSP

4

(*)23

Construction Noise

Leq(30min) Daytime

5

25

Water Quality

Water sampling

5

12

Joint Site Inspection / Audit

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

Contract 3

5

Contract 5

4

Remarks: (*) Power failure was occurred at AM2 on 20 December 2013.

 

Breach of Action and Limit (A/L) Levels

ES03            No exceedances of air quality, construction noise were registered in the Reporting Period.  For water quality monitoring, a total of two (2) Limit Level exceedances were recorded on 17 December 2013.  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

0

0

24-hour TSP

0

0

0

0

0

Construction Noise

Leq(30min) Daytime

0

0

0

0

0

Water Quality

DO

0

0

0

0

0

Turbidity

0

1

1

1

0

SS

0

1

1

1

0

 

Environmental Complaint

ES04            No environmental complaints were received in the Reporting Period.

 

Notification of Summons and Successful Prosecutions

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

 

Reporting Change

ES06            No reporting changes were made in the Reporting Period.

 

Site Inspection

ES07            In 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 4, 11, 18, 23 and 30 December 2013.  No non-compliance was noted.

ES08            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 5, 11, 19 and 24 December 2013.  No non-compliance was noted.

 

Future Key Issues

ES09            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.

 

ES10            During dry season, special attention should be paid on the potential construction dust impact since most of the construction sites are adjacent to villages.  The Contractor should fully implement the construction dust mitigation measures properly.

 

ES11            In addition, the potential water quality impact at the nearby rivers should be highly alerted.  The Contractors including Contract 3 and Contract 5 should prevent muddy water and other water pollutants via site surface water runoff get into the Kong Yiu Channel and Ma Wat Channel, water quality mitigation measures should be properly implemented.

 

 

 


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  8

3.1            General  8

3.2            Monitoring Parameters  8

3.3            Monitoring Locations  8

3.4            Monitoring Frequency and Period   10

3.5            Monitoring Equipment  10

3.6            Monitoring Methodology   12

3.7            Equipment Calibration   14

3.8            Derivation of Action/Limit (A/L) Levels  14

3.9            Data Management and Data QA/QC Control  15

4     Air Quality Monitoring   17

4.1            General  17

4.2            Air Quality Monitoring Results in Reporting Month   17

5     Construction Noise Monitoring   19

5.1            General  19

5.2            Noise Monitoring Results in Reporting Month   19

6     Water Quality Monitoring   20

6.1            General  20

6.2            Results of Water Quality Monitoring   20

7     Waste Management   22

7.1            General Waste Management  22

7.2            Records of Waste Quantities  22

8     Site Inspection   23

8.1            requirements  23

8.2            Findings / Deficiencies During the Reporting Month   23

9     Environmental Complaint and Non-Compliance   26

9.1            Environmental Complaint, Summons and Prosecution   26

10   Implementation Status of Mitigation Measures  27

10.1          General Requirements  27

10.2          Tentative Construction Activities in the Coming Month   27

10.3          Key Issues for the Coming Month   28

11   Conclusions and Recommendations  29

11.1          Conclusions  29

11.2          Recommendations  29

 


List of TABLES

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

Table 3-1           Summary of EM&A Requirements

Table 3-2           Impact Monitoring Stations - Air Quality

Table 3-3           Impact Monitoring Stations - Construction Noise

Table 3-4           Impact Monitoring Stations - Water Quality

Table 3-5           Air Quality Monitoring Equipment

Table 3-6           Construction Noise Monitoring Equipment

Table 3-7           Water Quality Monitoring Equipment

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

Table 3-9           Action and Limit Levels for Construction Noise

Table 3-10        Action and Limit Levels for Water Quality

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

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

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

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

Table 8-2           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       Master Construction Programme

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/A issued on 28 October 2013. 

 

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

 

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

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

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

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

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

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

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

 

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

 

1.1.5                 This is 5th monthly EM&A report presenting the monitoring results and inspection findings for reporting period from 1 to 31 December 2013.

 

1.2                       Report Structure

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

Section 1     Introduction

Section 2     Project Organization and Construction Progress

Section 3     Summary of Impact Monitoring Requirements

Section 4     Air Quality Monitoring

Section 5     Construction Noise Monitoring

Section 6     Water Quality Monitoring

Section 7     Waste Management

Section 8     Site Inspections

Section 9     Environmental Complaints and Non-Compliance

Section 10   Implementation Status of Mitigation Measures

Section 11   Conclusions and Recommendations

 

 

 

 


2                             Project Organization and Construction progress

2.1                       Construction Contract Packaging

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

¡P              Contract 2 (CV/2012/08)

¡P              Contract 3 (CV/2012/09)

¡P              Contract 4 (TCSS)

¡P              Contract 5 (CV/2013/03)

¡P              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.  Construction work is predicted to be commenced in early 2014.  Major Scope of Work of the Contract 2 is listed below:

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

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

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

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

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

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

 

Contract 3 (CV/2012/09)

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

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

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

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

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

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

 

Contract 4 (Contract number to be assigned)

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

 

Contract 5 (CV/2013/03)

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

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

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

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

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

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

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

 

Contract 6 (CV/2013/08)

2.1.7                 Contract 6 has 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:

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

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

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

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

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

¡P           Adhere to the procedures for carrying out complaint investigation

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

 

The Contractor(s)

2.2.5                 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:

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

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

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

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

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

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

¡P           Adhere to the procedures for carrying out complaint investigation

 

Environmental Team (ET)

2.2.6                 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:

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

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

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

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

¡P           Audit environmental conditions on site

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

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

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

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

¡P           Adhere to the procedures for carrying out complaint investigation

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

 

Independent Environmental Checker (IEC)

2.2.7                 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:

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

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

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

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

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

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

¡P           Check the effectiveness of corrective measures

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

¡P           Check that the mitigation measures are effectively implemented

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

¡P           Liaison with the client departments, Engineer/Engineer¡¦s Representative, 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/A);

                                (c)            Widening of Fanling Highway ¡V Tai Hang to Wo Hop Shek Interchange ¡V 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 3 and 5 and they are summarized in below.  Moreover, the master construction program of both Contracts 3 and 5 is enclosed in Appendix C.

 

Contract 2 (CV/2012/08)

Ÿ   The contract has not yet commenced.

 

Contract 3 (CV/2012/09)

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

Ÿ   Cable detection and trail trenches

Ÿ   Tree Felling Works

Ÿ   Trial Pit Excavation

Ÿ   Pre-drilling works and piling works

Ÿ   Extension of box culvert

Ÿ   Bored pile wall construction

Ÿ   Erection of site office

Ÿ   Construction of haul road and temporary soil platform for geotechnical works

 

Contract 4 (Contract number to be assigned)

Ÿ   The contract has not yet awarded.

 

Contract 5 (CV/2013/03)

The Contract commenced in April 2013.  In this Reporting Period, construction activities conducted is listed below:

Ÿ   Construction of Retaining Wall No.1

Ÿ   Eastern Lift shaft¡¦s piling works

Ÿ   Piling works at life shaft, Bridge J & footbridge

Ÿ   Construction of pedestrian subway and pump room at LMH

Ÿ   Pipe jacking across Kong Yuen River

Ÿ   Transplantation, Pruning/felling of existing tree

Ÿ   Drainage works at LMH Road

Ÿ   Formation Works at BCP Area

Ÿ   Construction of Depressed Road at BCP3

 

Contract 6 (CV/2013/08)

Ÿ   The contract is still 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 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 3 and 5

                                       

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 3

Contract 5

Contract 2, 4 & 6

1

Air pollution Control (Construction Dust) Regulation

Ref. No: 362101

Notification received by EPD on 17 Jul 2013

Ref. No: 359338

Notified EPD on 13 May 2013

--

2

Chemical Waste Producer Registration - Waste Producers Number

No.:5113-634-C3817-01 Valid form 7 Oct 2013 till the end of Contract

No.: 5213-642-S3735-01

Valid form 8 Jun 2013 till the end of Contract

--

3

Water Pollution Control Ordinance - Discharge License

No.:WT00016832 ¡V 2013

Valid from 28 Aug 13 to 31 Aug 2018

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. 7017914

Valid form 2 Aug 13 till the end of Contract

Account No. 7017351

Valid form 29 Apr 13 till the end of Contract

--

5

Construction Noise Permit

GW-RN0747-13

Valid on 4 Dec 13 till 19 Jan 14

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 (¢J).

Laboratory Analysis

Ÿ  Suspended Solids (mg/L)

 

3.3                       Monitoring Locations

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

Table 3-2        Impact Monitoring Stations - Air Quality

Station ID

Description

Works Area

Related to the Work Contract

AM1

Tsung Yuen Ha Village House No. 63

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

AM7a

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

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).

 

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. 80

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¡VControl A

Kau Lung Hang Stream

834028

837695

Alternative location located at downstream 28m of the designated location

Contract 3

WM4¡VControl 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

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-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-31

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 PRO20 Handheld Dissolved Oxygen Instrument

pH meter

The EcoSense ® pH10A pen-style instrument

Turbidimeter

Hach 2100Q

Sample Container

High density polythene bottles (provided by laboratory)

Storage Container

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

 

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). Supplementary statistical results (L10 and L90) were also obtained for reference.

 

3.6.7                 During the monitoring, all noise measurements would be performed with the meter set to FAST response and on the A-weighted equivalent continuous sound pressure level (Leq).  Leq(30min) in six consecutive Leq(5min) measurements will use as the monitoring parameter for the time period between 0700-1900 hours on weekdays; and also Leq(15min) in three consecutive Leq(5min) measurements would be used as monitoring parameter for other time periods (e.g. during restricted hours), if necessary.

 

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

 

Water Quality

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

 

Sampling Procedure

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

 

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

 

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

 

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

 

In-situ Measurement

3.6.14             YSI PRO20 Handheld Dissolved Oxygen Instrument is used for water in-situ measures, which automates the measurements and data logging of temperature, dissolved oxygen and dissolved oxygen saturation.  Before each round of monitoring, the dissolved oxygen probe would be calibrated by the wet bulb method.

 

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

 

3.6.16             A portable Hach 2100Q Turbidimeter is used for in-situ turbidity measurement. The turbidity meter is capable of measuring turbidity in the range of 0 ¡V 1000 NTU.  StablCal® Standards 10NTU and 100NTU 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 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

AM1

265

143

500

260

AM2

268

149

AM3

269

145

AM4a

267

148

AM5

268

143

AM6

269

148

AM7a

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 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 3 and 5 and air quality monitoring was performed at 4 relevant designated locations as below:

Ÿ    AM1 - Tsung Yuen Ha Village House No. 63;

Ÿ    AM2 - Village House near Lin Ma Hang Road;

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

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 60 events of 1-hour TSP and 23 events of 24-hours TSP monitoring were carried out and the monitoring results are summarized in Tables 4-1 to 4-4.  The detailed 24-hour TSP monitoring data are presented in Appendix I and the relevant graphical plots are shown in Appendix J.

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

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

03-Dec-13

58

05-Dec-13

11:07

130

97

81

09-Dec-13

113

11-Dec-13

10:53

211

220

212

14-Dec-13

141

17-Dec-13

11:09

134

105

137

20-Dec-13

109

23-Dec-13

10:32

227

230

220

24-Dec-13

109

28-Dec-13

09:50

173

222

177

30-Dec-13

134

 

 

 

 

 

Average

(Range)

111

(58 ¡V 141)

Average

(Range)

172

(81 ¡V 230)

 

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

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

03-Dec-13

85

05-Dec-13

11:01

118

116

92

09-Dec-13

117

11-Dec-13

10:42

220

215

203

14-Dec-13

86

17-Dec-13

12:00

101

112

120

*20-Dec-13

NA

23-Dec-13

11:06

265

249

254

24-Dec-13

140

28-Dec-13

09:56

199

237

230

30-Dec-13

144

 

 

 

 

 

Average

(Range)

115

(85 ¡V 144)

Average

(Range)

182

(92 ¡V 265)

Remarks: (*) Power failure was occurred on 20 December 2013.

 

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

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

03-Dec-13

93

05-Dec-13

12:23

84

69

74

09-Dec-13

133

11-Dec-13

10:34

244

234

229

14-Dec-13

79

17-Dec-13

12:03

98

92

119

20-Dec-13

139

23-Dec-13

11:21

236

254

240

24-Dec-13

114

28-Dec-13

10:14

221

244

268

30-Dec-13

136

 

 

 

 

 

Average

(Range)

116

(79 ¡V 139)

Average

(Range)

180

(69 ¡V 268)

 

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

Date

24-hour TSP (mg/m3)

1-hour TSP (mg/m3)

Date

Start Time

1st reading

2nd reading

3rd reading

03-Dec-13

104

05-Dec-13

13:11

80

72

76

09-Dec-13

42

11-Dec-13

11:32

208

211

232

14-Dec-13

56

17-Dec-13

10:22

86

154

121

20-Dec-13

78

23-Dec-13

15:15

244

267

258

24-Dec-13

69

28-Dec-13

10:45

134

192

220

30-Dec-13

58

 

 

 

 

 

Average

(Range)

68

(42 ¡V 104)

Average

(Range)

170

(72 ¡V 267)

 

4.2.2                 In Reporting period, AM2 power failure occurred on 20 December 2013.  Power supply has resumed on 23 December 2013.  So, only five events of 24-hour TSP monitoring conducted at AM2.

 

4.2.3                 As shown in Tables 4-1 to 4-4, the 24-hour and 1-hour TSP monitoring results were below the Action/ Limit Level.  No Notification of Exceedances (NOE) of air quality criteria or corrective action was therefore required.

 

4.2.4                 Two months interval calibration has been carried out at AM1, AM2 and AM3 in accordance with the EM&A Manual requirements.  The updated calibration certificates are attached in Appendix F.

 

4.2.5                 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 3 and 5 and noise monitoring was performed at 5 relevant designated locations as below:

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

Ÿ    NM2 - Village House near Lin Ma Hang Road;

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 25 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, 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 Tables 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  

Date

NM1

(Leq30min)

NM2

(Leq30min)

NM8

(Leq30min)

NM9

(Leq30min)

(*) NM10

(Leq30min)

05-Dec-13

57

67

63

63

62

11-Dec-13

55

59

62

64

61

19-Dec-13

55

61

63

62

61

23-Dec-13

52

60

56

71

60

28-Dec-13

55

61

61

63

60

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 Tables 5-1, the noise level measured at five (5) designated monitoring locations were below 75dB(A).  Furthermore, there were no noise complaints (Action Level exceedance) received by the RE, Contractor or CEDD in the Reporting Period.  Therefore, no Action or Limit Level exceedance was triggered and no corrective action was therefore 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 ¡V Contract 5 working site downstream at Kong Yiu Channel;

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

Ÿ    WM4 - Contract 3 working site Downstream of Ma Wat Channel

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

Ÿ    WM4¡VControl 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, a total of 12 sampling days were performed for water quality monitoring at Contracts 3 and 5.  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 Contract 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

3-Dec-13

8.8

7.0

7.2

18.5

3.5

3.8

19.0

4.0

8.0

5-Dec-13

7.2

7.8

6.7

7.0

43.9

4.2

7.0

43.5

5.5

7-Dec-13

9.1

6.3

9.5

16.2

8.0

13.5

17.5

5.5

15.5

9-Dec-13

11.4

6.4

10.1

12.4

8.8

4.8

15.5

8.5

5.0

11-Dec-13

8.7

6.6

8.1

7.4

3.0

4.9

8.0

2.0

3.5

13-Dec-13

9.2

8.8

7.1

7.9

7.3

3.8

8.0

16.0

3.5

17-Dec-13

10.4

11.3

6.8

25.5

10.5

16.5

25.0

10.5

13.5

19-Dec-13

7.0

9.0

6.1

13.0

2.6

5.9

10.5

2.0

4.0

21-Dec-13

8.0

7.9

7.3

5.4

13.4

4.5

6.5

9.5

4.5

23-Dec-13

6.8

7.1

10.5

6.7

2.5

4.3

5.0

<2

8.0

28-Dec-13

11.8

11.2

8.7

16.6

3.4

4.1

12.5

<2

2.0

30-Dec-13

10.6

9.0

9.3

7.2

12.6

6.8

5.0

4.0

3.5

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

3-Dec-13

7.1

5.6

12.3

6.8

11.5

2.5

5-Dec-13

6.3

6.6

8.2

6.5

5.0

5.0

7-Dec-13

6.5

10.6

8.0

12.3

6.0

20.0

9-Dec-13

8.6

11.5

9.9

5.5

9.5

3.0

11-Dec-13

8.4

9.2

17.4

5.7

13.5

2.5

13-Dec-13

6.5

8.3

7.1

5.2

6.5

4.0

17-Dec-13

8.3

9.7

209.0

55.6

107.5

35.0

19-Dec-13

5.6

7.7

18.4

151.0

13.0

112.5

21-Dec-13

7.2

6.7

8.1

8.7

10.5

5.5

23-Dec-13

7.9

7.8

8.4

5.6

6.0

3.0

28-Dec-13

7.4

8.1

15.6

6.5

12.0

<2

30-Dec-13

8.1

5.5

6.9

5.9

3.0

<2

         Remark: Bold and underlined indicated Limit Level exceedance

 

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

Location

Dissolved Oxygen

(mg/L)

Turbidity

(NTU)

Suspended Solids

(mg/L)

Total Exceedance

Action

Limit

Action

Limit

Action

Limit

Action

Limit

WM1

0

0

0

1

0

1

0

2

WM4

0

0

0

0

0

0

0

0

No of Exceedance

0

0

0

1

0

1

0

2

 

6.2.2                 In view of the monitoring results of Dissolved Oxygen (DO), all the measured results were higher than Action Level exceedance and no exceedances were therefore triggered.

 

6.2.3                 Two (2) Limit Level exceedances including parameters turbidity and SS were recorded at WM1 on 17 December 2013.  The Notification on Exceedances (NOEs) was issued to all relevant parties upon the results confirmed. The investigation for the cause of exceedance was completed and the result is presented as follow:

Ÿ     According to the site information provided by SRJV, the site construction activities carried out on 17 Dec 2013 included sheet piling and formworks erection of Retaining Wall No.1, and backfill at BCP Area.

Ÿ     All the active construction activities under the project are land based and do not disturb the river environment.

Ÿ     On 14, 15 and 16 Dec before the sampling day, Hong Kong Observatory recorded has raining; moreover the sampling date 17 December 2013 also has raining.  As reviewed baseline monitoring data, turbidity and suspended solids of abnormally high result are obtained after rainfall or rainy day.  The condition of the river water quality is highly influenced by the rainfall.

Ÿ     Upon receipt of the NOE, SRJV provided site photograph records dated 17 Dec 2013.  Reviewing the provided photograph records, muddy water observed at upstream on Tsung Yuen Ha Village.

Ÿ     Addition, some soil strain/mark observed at other side of Kong Yiu River of the DSD maintenance access and slope surface which situated outside the Project site boundary.

Ÿ     SRJV have implemented water mitigation measures such as erection of sand bags barrier along the edge of the river and works area to prevent the storm runoff into the existing river.

 

6.2.4                 Based on above investigation and consider that the exceedance should not be due to the Project works.

 

 

 


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 3

Contract 5

Total Quantity for the Project

Quantity

Disposal Location

Quantity

Disposal Location

C&D Materials (Inert)

(in '000m3)

0.177

-

0

--

0.177

Reused in this Project (Inert)

(in '000 m3)

0.030

-

0

--

0.030

Reused in other Projects (Inert) (in '000 m3)

0

-

0

--

0

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

0.140

Tuen Mun 38

0

--

0.140

 

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

Type of Waste

Contract 3

Contract 5

Total Quantity for the Project

Quantity

Disposal Location

Quantity

Disposal Location

Recycled Metal (kg)

0

-

11.53

--

11.53

Recycled Paper / Cardboard Packing (kg)

0

-

0

--

0

Recycled Plastic (kg)

0

-

0

--

0

Chemical Wastes (kg)

0

-

0

--

0

General Refuses (in '000m3)

0.055

NENT

0.2

NENT

0.255

 


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 3

8.2.1                 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 4, 11, 18, 23 and 30 December 2013.  No non-compliance was noted.

 

8.2.2                 The findings / deficiencies of Contract 3 that observed during the weekly site inspection are listed in Table 8-1.

Table 8-1           Site Observations for Contract 3

Date

Findings / Deficiencies

Follow-Up Status

27 Nov 2013

(last Reporting Period)

Ÿ  Free standing chemical was observed at construction site, the Contractor was reminded to provide enough drip tray for all free standing chemical at the construction site.

Ÿ  Free standing chemical container was removed from construction site before site inspection on 4 December 2013

Ÿ  Fences for tree protection is not enough, the Contractor was reminded to provide enough fence to protect all the trees retained on site.

Ÿ  Tree fence has erected to protect all trees retained on site.

Ÿ  The Contractor was reminded that the chemical container should be located far from the U-channel to prevent contamination of the riverbody

Ÿ  During site inspection dated 4 December 2013, the chemical container has located far from the U-channel.

04 Dec 2013

Ÿ  Trees to be transplanted or retained should be protected by durable fence and designated as no intrusion zone in Nam Wa Po.

Ÿ  In Nam Wa Po, all trees has fenced off during site inspection on 18 December 2013.

 

Ÿ  Oil stain observed at Tai Wo Service Road West. The Contractor is reminded to clear-up and all the working plant used at site should be regular carried out maintainance.

Ÿ  No oil stain has observed at Tai Wo Service Road West during site inspection 11 December 2013.

11 Dec 2013

Ÿ  The Contractor was reminded to prevent oil spilling and clear the oil stain at Nam Wa Po near AM9b monitoring station

Ÿ  No oil stain has observed at Nam Wa Po during site inspection 23 December 2013.

18 Dec 2013

Ÿ  The Contractor should be improvement tree fences to protect on site the retained tree.

Ÿ  Tree fences has improved before site inspection dated 30 December 2013

Ÿ  The Contractor was recommended improve wheel washing bay to ensure all wastewater collection and delivery to desilting facility.

Ÿ  The improvement work is not yet undertaken and it will be report in the coming month.

Ÿ  Required the Contractor to provide enough rubbish bins at Nam Wa Po.

Ÿ  Extra rubbish bins or plastic bags has been provided at Nam Wa Po. Also, daily cleaning has followed.

23 Dec 2013

Ÿ  The Contractor is reminded to provide sand bag as water mitigation measure at the drainage trench in Nam Wa Po near Tai Wo Service Road West for desilting runoff from the road.

Ÿ  A sand bag bund has provided at the drainage trench as observed on 30 December 2013 during site inspection.

30 Dec 2013

Ÿ  The construction materials were observed located within tree protection zone.  The Contractor was required immediately remove those materials.

Ÿ  Will be reported in the coming month

Ÿ  Water overflow observed in water storage tank. To prevent the wastage, the Contractor should be repaired it to stop the issue.

Ÿ  The general refuse, C&D material and trunk waste should be clean-up regular basis

 

8.2.3                 Moreover, the general housekeeping such as tidiness of weekly and cleaniness of daily should be maintained in accordance with the PS requirements.

 

The Contract 5

8.2.4                 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 5, 11, 19 and 24 December 2013.  No non-compliance was noted.

 

8.2.5                 The findings / deficiencies of Contract 5 that observed during the weekly site inspection are listed in Table 8-2.

Table 8-2           Site Observations for Contract 5

Date

Findings / Deficiencies

Follow-Up Status

28 Nov 2013

(last Reporting Period)

Ÿ  Muddy runoff through the gaps of the sandbag bund was suspected at the Metal Bridge (A), the Contractor should maintain the sandbag bund properly.

Ÿ  Sand and cement mortar has been provided at the edge of Metal Bridge (A) during site inspection on 5 December 2013.

Ÿ  Muddy water was observed on the public road at both Kaw Liu Village (Photo 3) and Metal Bridge B area (Photo 4), the Contractor was reminded to clean to road regularly to get rid of loose and mud tail.

Ÿ  No muddy water or loose soil are observed at Kaw Liu Village during site inspections.

Ÿ  The Contractor was reminded to apply mitigation measure to prevent potential runoff of soil from metal pipe to the river at the Metal Bridge B.

Ÿ  Sand bags has provided at the metal pipe.

Ÿ  At Area BCP7, the Contractor was reminded to treat lubricant oil as chemical waste.

Ÿ  The Contractor has followed compliance with the chemical waste disposal requirements.

05 Dec 2013

Ÿ  The Contractor was reminded to remove the stagnant water.

Ÿ  No stagnant water was observed during site inspection 11 December 2013.

Ÿ  Free standing chemical container was observed, the Contractor was reminded to provide drip tray to all chemical containers.

Ÿ  During site inspection dated 19 December 2013, all chemical containers located on site has been provided drip tray to prevent land contamination.

11 Dec 2013

Ÿ  The Contractor was recommended to build a rock bund or soil bund as desilting facilities around the discharging steel pipeline to prevent water pollution.

Ÿ  A rock bund has built-up during site inspection on 24 December 2013.

Ÿ  Uncover stockpile was observed, the Contractor was reminded to cover the stockpile to prevent fugitive dust emission. Moreover, the Contractor was recommended to build a three-sides shelter, including the top cover, if the cement mixing works will be carried out.

Ÿ  During site inspection on 19 December 2013, the stockpile of construction material observed is wet.

Ÿ  Dry haul road was observed, the Contractor was reminded to provide water spraying in regular basis.

Ÿ  Water spraying frequency eight times per day has followed in accordance with the dust mitigation measures stipulation.

Ÿ  A soakaway facility was observed during site inspection, the Contractor was recommended to fence off this zone and provide notification board.

Ÿ  Fences and signage has been provided at the soakaway facility observed during site inspection in 19 December 2013

19 Dec 2013

Ÿ  Stagnant water inside containers was observed after rainfall, the Contractor was reminded to cover them or turn the containers upside down to prevent accumulated water.

Ÿ  During site inspection on 24 December 2013, all not used containers located on site were covered with plastic sheet or turned upside down to prevent accumulated water.  Moreover, no stagnant water observed at the using containers.

Ÿ  The Contractor was reminded to provide proper labels for all chemical container.

Ÿ  Relevant label has been provided for chemical container during site inspection on 24 December 2013.

Ÿ  Uncovered sand stockpile was observed, the Contractor was reminded to cover the stockpile with imprevios sheet or remove it to prevent fugitive dust.

Ÿ  Still yet rectified and will be reported in the coming month.

24 Dec 2013

Ÿ  At location Lin Ma Hang, the Contractor should provide water quality mitigation measure for discharge water, and proper mitigation measure has been provided immediately to prevent water pollution.

Ÿ  Disused de-silting pool should be backfilled and also the soakaway path should be minimized or limited to improve its formation.

Ÿ  Will be reported in the coming month

 

8.2.6                 Moreover, the general housekeeping such as tidiness of weekly and cleaniness of daily should be maintained in accordance with the PS requirements.  Addition, regular basis cleaning the wheel washing bay is reminder.  Furthermore, works at Bridge J Area, tree protected fences should be provided to protect all retained tree.

 

Other Contracts

8.2.7                 Since the construction works at the Contract 2 and Contract 4 and Contract 6 are not yet commenced, no site inspection is performed for these Contracts.

 

 

 

9                             Environmental Complaint and Non-Compliance

9.1                       Environmental Complaint, Summons and Prosecution

The Contract 3

9.1.1                 The Liantang/Heung Yuen Wai Boundary Control Point and Associated Works, no environmental complaint, summons and prosecution under the EM&A Programme was received in the Reporting Period. 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

6 Nov 2013 to

30 Nov 2013

Contract 3

0

0

NA

16 Aug 2013 to

30 Nov 2013

Contract 5

0

0

NA

1 ¡V 31 Dec 2013

Contract 3

0

0

NA

Contract 5

0

0

NA

 

Table 9-2           Statistical Summary of Environmental Summons

Reporting Period

Contract No

Environmental Summons Statistics

Frequency

Cumulative

Complaint Nature

6 Nov 2013 to

30 Nov 2013

Contract 3

0

0

NA

16 Aug 2013 to

30 Nov 2013

Contract 5

0

0

NA

1 ¡V 31 Dec 2013

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

6 Nov 2013 to

30 Nov 2013

Contract 3

0

0

NA

16 Aug 2013 to

30 Nov 2013

Contract 5

0

0

NA

1 ¡V 31 Dec 2013

Contract 3

0

0

NA

Contract 5

0

0

NA

 

The Other Contracts

9.1.2                 Since the construction works at the Contract 2, Contract 4 and Contract 6 are 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 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

¡P       Wastewater to be treated by filtration system; such as, silt curtain or sedimentation tank before discharge.

¡P       Replace silt curtain materials if necessary

Air Quality

¡P       Maintain damp / wet surface on access road

¡P       Keep slow speed in the sites

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

¡P       Sprayed water during breaking works

Noise

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

¡P       Keep good maintenance of plants

¡P       Place noisy plants away from residence or school

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

¡P       Shut down the plants when not in used.

Waste and Chemical Management

¡P       On-site sorting prior to disposal

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

¡P       Predict required quantity of concrete accurately

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

General

¡P       The site was generally kept tidy and clean.

 

10.2                   Tentative Construction Activities in the Coming Month

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

Contract 3

Ÿ   Erection of site office

Ÿ   Cable detection and trial trenches

Ÿ   Pre-drilling works and piling works

Ÿ   Tree felling works, waterworks and excavation works

Ÿ   Dismantling works for abandoned houses

Ÿ   Slope upgrading works

Ÿ   Noise barrier installation

Ÿ   Extension of box culvert

Ÿ   Construction of haul road and temporary soil platform for geotechnical works

Ÿ   Laying of concrete pipe works

Contract 5

Ÿ   Construction of retaining wall No.1

Ÿ   Piling works at life shaft, Bridge J & footbridge

Ÿ   Construction of pedestrian subway and pump room at LMH

Ÿ   Pipe jacking across Kong Yuen River

Ÿ   Formation Works at BCP Area

Ÿ   Construction of Depressed Road at BCP3

Ÿ   Transplantation, Pruning/felling of existing tree

Ÿ   Drainage and Sewerage works at LMH Road

 

10.3                   Key Issues for the Coming Month

10.3.1             Key issues to be considered in the coming month for Contracts 3 and 5 include:

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             For other Contracts, no environmental issue is considered due to these contracts still yet to commence.


11                         Conclusions and Recommendations

11.1                   Conclusions

11.1.1             This is 5th monthly EM&A report presenting the monitoring results and inspection findings for the Reporting Period from 1 to 31 December 2013.

 

11.1.2             No 24-hour or 1-hour TSP monitoring results that triggered the Action or Limit Levels were recorded.  No NOEs or the associated corrective actions were therefore issued.

 

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

 

11.1.4             For water quality monitoring, two (2) Limit Level exceedances were recorded on 17 December 2013 at W1.  The Notification on Exceedances (NOEs) was issued to all relevant parties.  Based on investigation findings to conclude that the exceedance should not be due to the Project works.

 

11.1.5             No environmental complaint, notification of summons or successful prosecution under the EM&A Programme of the Liantang/Heung Yuen Wai Boundary Control Point and Associated Works was received in the reporting period.  

 

11.1.6             Four (4) and five (5) events of joint site inspection by the RE, IEC, ET and main-contractor were respectively carried out for Contracts 3 and 5.  No non-compliance observed during the site inspection.  During dry season, air quality mitigation measures such as increase the water spray frequency (at least eight times per day) in haul road to prevent construction dust emission is reminded.  The environmental performance of the Project of Contracts 3 and 5 was therefore considered as satisfactory.

 

11.1.7             Joint site inspection during Reporting Period, five events for Contract 3 and four events for Contract 5 were carried out the RE, IEC, ET and Main-contractor in accordance with the EM&A Manual stipulation.  No non-compliance observed during the site inspection.  During dry season, air quality mitigation measures such as increase the water spray frequency (at least eight times per day) in haul road to prevent construction dust emission is reminded.  The environmental performance of the Project of Contracts 3 and 5 was therefore considered as satisfactory.

 

11.2                   Recommendations

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

 

11.2.2             Moreover, muddy water and other water quality pollutants via site surface water runoff get into Kong Yiu Channel and Ma Wat Channel to public areas should be avoided.  Mitigation measures for water quality should be properly implemented.

 

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

 

11.2.4             Mosquito control measures should be continued to prevent mosquito breeding on site.