TABLE OF CONTENTS

Page

EXECUTIVE SUMMARY  1

Reporting Change  1

1       introduction  2

1.1     Background  2

1.2     Scope of Report 3

1.3     Project Organization  3

1.4     Summary of Construction Works  4

1.5     Summary of EM&A Programme Requirements  5

2       AIR QUALITY MONITORING   6

2.1     Monitoring Requirements  6

2.2     Monitoring Equipment 6

2.3     Monitoring Locations  6

2.4     Monitoring Parameters, Frequency and Duration  7

2.5     Monitoring Methodology  7

2.6     Monitoring Schedule for the Reporting Month  8

2.7     Monitoring Results  9

2.8     Results and Observations  9

3       Noise MONITORING   10

3.1     Monitoring Requirements  10

3.2     Monitoring Equipment 10

3.3     Monitoring Locations  10

3.4     Monitoring Parameters, Frequency and Duration  11

3.5     Monitoring Methodology  11

3.6     Monitoring Schedule for the Reporting Month  12

3.7     Monitoring Results  12

4       ENVIRONMENTAL SITE INSPECTION AND AUDIT  13

4.1     Site Inspection  13

4.2     Advice on the Solid and Liquid Waste Management Status  14

4.3     Environmental Licenses and Permits  14

4.4     Implementation Status of Environmental Mitigation Measures  18

4.5     Summary of Exceedances of the Environmental Quality Performance Limit 18

4.6     Summary of Complaints, Notification of Summons and Successful Prosecutions  19

5       FUTURE KEY ISSUES  22

5.1     Construction Programme for the Coming Month  22

5.2     Key Issues for the Coming Month  22

5.3     Monitoring Schedule for the Coming Month  22

6       ConclusionS AND RECOMMENDATIONS  23

6.1     Conclusions  23

6.2     Recommendations  23

 

 

 

 

 

 

 

 

 

 

 

 

List of Tables

                                                                                                                                              

Table 1.1       Contact Information of Key Personnel

Table 2.1       Air Quality Monitoring Equipment

Table 2.2       Locations of Impact Air Quality Monitoring Stations

Table 2.3       Air Quality Monitoring Parameters, Frequency and Duration

Table 2.4       Summary of 1-hour TSP Monitoring Results in the Reporting Period

Table 2.5       Summary of 24-hour TSP Monitoring Results in the Reporting Period

Table 3.1       Noise Monitoring Equipment

Table 3.2       Locations of Impact Noise Monitoring Stations

Table 3.3       Noise Monitoring Parameters, Frequency and Duration

Table 3.4       Summary of Construction Noise Monitoring Results in the Reporting Period

Table 4.1       Summary of Environmental Licensing and Permit Status

 

 

Figures

 

Figure 1.1      General Project Layout Plan

Figure 2.1      EM&A Monitoring Locations

Figure 4.1      Environmental Complaint Handling Procedures                                            

 

 

List of Appendices

 

Appendix A       Project Organization Structure

Appendix B       Construction Programmes

Appendix C       Implementation Schedule of Environmental Mitigation Measures (EMIS)

Appendix D      Summary of Action and Limit Levels

Appendix E       Calibration Certificates of Monitoring Equipments

Appendix F       EM&A Monitoring Schedules

Appendix G      Impact Air Quality Monitoring Results and their Graphical Presentation

Appendix H       Meteorological Data for the Reporting Month

Appendix I        Impact Daytime Construction Noise Monitoring Results and their Graphical Presentation

Appendix J       Event Action Plan

Appendix K       Site Inspection Summaries

Appendix L       Statistics on Complaints, Notifications of Summons and Successful Prosecutions

 


EXECUTIVE SUMMARY

The proposed widening of Tolo Highway and Fanling Highway between Island House Interchange and Fanling (the Project) is a Designated Project under the Environmental Impact Assessment Ordinance (Cap. 499) (EIAO) and is governed by an Environmental Permit (EP-324/2008)(EP) issued by EPD on 23 December 2008. Subsequently, EPD issued a Variation of Environmental Permit (EP-324/2008/A) (VEP) on 31 January 2012.

The Project aims to widen Tolo Highway and Fanling Highway to dual 4-lane carriageway in order to alleviate the current traffic congestion problems and to cope with the increasing transport demands to and from the urban areas and also cross boundary traffic.

The construction works for this Project will be delivered in 2 stages i.e. Stage 1 (between Island House Interchange and Tai Hang) and Stage 2 (between Tai Hang and Wo Hop Shek Interchange). The construction works of Stage 1 were commenced on 23 November 2009 and will tentatively be completed in March 2014. This report focuses on Stage 1 of the Project only.

The construction phase of Stage 1 under the EP and the Environmental Monitoring and Audit (EM&A) programme for Stage 1 of the Project commenced on 23 November 2009. The impact environmental monitoring and audit includes air quality and noise monitoring.

This report documents the findings of EM&A works conducted in the period between 1 and 31 January 2014.

 

As informed by the Contract 1 Contractor (China State Construction Engineering (Hong Kong) Ltd.), construction activities in the reporting period were:-

-          Temporary shoring, sheetpiling and excavation

-          At-grade road construction

-          Retaining wall construction

-          Noise barrier footing construction

-          Noise barrier panels installation

-          Asphalt laying

-          Installation of Drainage Pipes

 

 

The construction works carried out by the Contract 2 Contractor (Gammon Construction Ltd.) in the reporting period were:-

-          Condition survey of existing structures

-          Setting up the temporary traffic arrangement

-          Excavation of trial trenches to locate existing utilities

-          Construction of haul road

-          Construction of concrete profile barrier and beam barrier

-          Construction of Pilecap / Spread footing of noise barriers / semi-noise enclosures

-          Slope works, including installation of soil nails

-          Noise barrier construction

-          Modification of existing bridge structures

-          Entrusted watermains works

-          Sewer Installation

-          Road and drainage works

-          Landscaping works

 

 

Reporting Change

There was no reporting change required in the reporting month.

Breaches of Action and Limit Levels for Air Quality

No exceedance of Action and Limit Level was recorded for 1-hour and 24-hour TSP monitoring in the reporting month.

Breaches of Action and Limit Levels for Noise

No Action Level exceedance of construction noise was recorded in the reporting month since no noise complaints related to 0700 ¨C 1900 hours on normal weekdays was received and followed by the Environmental Team in the reporting month.

 

No Limit Level exceedance of construction noise was recorded in the reporting month.

Complaint, Notification of Summons and Successful Prosecution

One (1) noise-related complaint was received on 13 January 2014 and followed up by the Environmental Team in January 2014. The summary of investigation is described in Sections 4.6.3 to 4.6.5.

 

One (1) air-and¨Cwater related complaint was received on 21 January 2014 and followed up by the Environmental Team in January 2014. The summary of investigation is described in Sections 4.6.6 to 4.6.8.

 

One (1) air-related follow-up complaint was received on 22 January 2014 and followed up by the Environmental Team in January 2014. The summary of investigation is described in Sections 4.6.9 to 4.6.11.

 

No notification of summons and successful prosecution was received in the reporting month.

 

Future Key Issues

 

Key issues to be considered in the coming month included:-

 

- Properly store and label oils and chemicals on site;

- Chemical, chemical waste and waste management;

- Collection of construction waste should be carried out regularly;

- Site runoff should be properly collected and treated prior to discharge;

- Properly maintain all drainage facilities and wheel washing facilities on site;

- Exposed slopes should be covered up properly if no temporary work will be conducted;

- Suppress dust generated from excavation, breaking and drilling activities, haul road traffic and grout mixing;

- Quieter powered mechanical equipment should be used;

- Closely check and replace the sound insulation materials wrapped at the concrete breaker tip regularly;

- Better scheduling of construction works to minimize noise nuisance; and

- Tree protective measures for all retained trees should be well maintained.

 

 

1             introduction

1.1       Background

1.1.1.     Tolo Highway and Fanling Highway are expressways in the North East New Territories connecting Sha Tin, Tai Po and Fanling. These highways form a vital part of the strategic Route 9, which links other major strategic routes to Shenzhen. At present, this section of Route 9 is dual 3-lane carriageway. However, at several major interchanges along this section of Route 9, the highway is only dual-2 lane. Severe congestion is a frequent occurrence during peak periods, particularly in the Kowloon bound direction.

 

1.1.2.     The objective of the Project ¡°Widening of Tolo Highway / Fanling Highway between Island House Interchange and Fanling¡± is to widen Tolo Highway and Fanling Highway to dual 4-lane carriageway in order to alleviate the current traffic congestion problems and to cope with the increasing transport demands to and from the urban areas and also cross boundary traffic.

 

1.1.3.     The Project is a designated project and is governed by an Environmental Permit (EP-324/2008)(EP) issued by EPD on 23 December 2008. Subsequently, EPD issued a Variation of Environmental Permit (EP-324/2008/A) (VEP) on 31 January 2012.

 

1.1.4.     The scope of the Project comprises mainly:-

 

(i)

Widening of a 5.7 km section of Tolo Highway and 3.0 km section of Fanling Highway between Island House Interchange and Wo Hop Shek Interchange from the existing dual 3-lane to dual 4-lane, including construction of new vehicular bridges;

(ii)

Widening of interchange sections at Island House Interchange, Tai Po North Interchange, and Lam Kam Road Interchange from dual 2-lane to dual 3-lane, except Sha Tin bound carriageway at Tai Po North Interchange, which is widened from 3-lane to 4-lane, including realignment of various slip roads;

(iii)

Modification and reconstruction of highways, vehicular bridges, underpasses and footbridges.

 

1.1.5.     The construction works for this Project will be delivered in 2 stages i.e. Stage 1 (between Island House Interchange and Tai Hang) and Stage 2 (between Tai Hang and Wo Hop Shek Interchange). The construction works of Stage 1 commenced on 23 November 2009 and will tentatively be completed in March 2014; while the construction works of Stage 2 commenced on 21 November 2013. This report focuses on Stage 1 of the Project only.

 

1.1.6.     The construction works for Stage 1 of the Project will be implemented under 2 works contracts (Contract 1 and Contract 2).  Contract 1 covers the section of Tolo Highway between Island House Interchange and Ma Wo, Contract 2 covers the section of Tolo Highway between Ma Wo and Tai Hang.

 

1.1.7.     Hyder-Arup-Black and Veatch Joint Venture (HABVJV) are appointed by Highways Department (HyD) as the consultants for the design and construction assignment for the Tolo project under Agreement No. CE 58/2000 Supplementary Agreement No. 3 (SA3) (i.e. the Engineer for the Contracts).

 

1.1.8.     China State Construction Engineering (Hong Kong) Ltd. (CSHK) was commissioned as the Contractor of Contract 1 of Stage 1 of the Project, while Gammon Construction Limited (GCL) was commissioned as the Contractor of Contract 2 of Stage 1 of the Project.

 

1.1.9.     AECOM Asia Co. Ltd. was employed by HyD as the Environmental Team (ET) to undertake the Environmental Monitoring and Audit (EM&A) works for Stage 1 of the Project and Mott MacDonald Hong Kong Ltd. acts as the Independent Environmental Checker (IEC) for the Contracts.

 

1.1.10.   The construction phase of Stage 1 under the EP commenced on 23 November 2009.

 

1.1.11.   According to the updated EM&A Manual of Stage 1 of the Project, there is a need of an EM&A programme including air quality and noise monitoring. The EM&A programme for Stage 1 of the Project commenced on 23 November 2009.

 

1.2           Scope of Report

1.2.1       This is the fifty-first monthly EM&A Report under the Agreement No. CE 20/2009 (EP) - Widening of Tolo Highway between Island House Interchange and Tai Hang ¨C Investigation.  This report presents a summary of the environmental monitoring and audit works, list of activities and mitigation measures proposed by the ET for Stage 1 of the Project in January 2014.

 

1.3          Project Organization

1.3.1       The project organization structure is shown in Appendix A. The key personnel contact names and numbers are summarized in Table 1.1.


 

  Table 1.1          Contact Information of Key Personnel

Party

Position

Name

Telephone

Fax

ER of Stage 1, Contract 1

(Hyder-Arup-Black & Veatch Joint Venture)

Chief Resident Engineer /TOLO1

James Tsang  

9038 8797

26674000

ER of Stage 1, Contract 2

(Hyder-Arup-Black & Veatch Joint Venture)

Chief Resident Engineer /TOLO2

Paul Appleton

9097 5833

2653 2348

IEC of Stage 1

 (Mott MacDonald Hong Kong Limited)

Independent Environmental Checker

Terence Kong

2828 5919

2827 1823

Contractor of   

Stage 1, Contract 1

 

(China State Construction Engineering (Hong Kong) Limited)

Site Agent

Eddie Tang

9863 7686

2667 5666

Environmental Officer

Michael Tsang

9277 4956

2667 5666

M L Lam

9489 4641

2667 5666

Contractor of

Stage 1, Contract 2

 

(Gammon Construction Limited)

Site Agent

John Chan

3126 1202

2559 3410

Environmental Officer

Thomson Chang

9213 6569

2559 3410

Crispin Ao

9223 8773

2559 3410

Jason Cheng

9837 9323

2559 3410

ET of Stage 1

 (AECOM Asia Company Limited)

ET Leader

Y T Tang

3922 9393

   3922 9797

 

1.4          Summary of Construction Works

1.4.1       The construction phase of Stage 1 under the EP commenced on 23 November 2009.

1.4.2       Details of the construction works carried out by the Contract 1 Contractor (China State Construction Engineering (Hong Kong) Ltd.) in this reporting period are listed below:-

-          Temporary shoring, sheetpiling and excavation

-          At-grade road construction

-          Retaining wall construction

-          Noise barrier footing construction

-          Noise barrier panels installation

-          Asphalt laying

-          Installation of Drainage Pipes

 

 

1.4.3       Details of the construction works carried out by the Contract 2 Contractor (Gammon Construction Ltd.) in this reporting period are listed below:-

-          Condition survey of existing structures

-          Setting up the temporary traffic arrangement

-          Excavation of trial trenches to locate existing utilities

-          Construction of haul road

-          Construction of concrete profile barrier and beam barrier

-          Construction of Pilecap / Spread footing of noise barriers / semi-noise enclosures

-          Slope works, including installation of soil nails

-          Noise barrier construction

-          Modification of existing bridge structures

-          Entrusted watermains works

-          Sewer Installation

-          Road and drainage works

-          Landscaping works

 

1.4.4       The Construction Programmes are shown in Appendix B.

1.4.5       The general layout plan of the Project site showing the contract areas is shown in Figure 1.1.

1.4.6       The environmental mitigation measures implementation schedule are presented in Appendix C.

1.5          Summary of EM&A Programme Requirements

1.5.1       The EM&A programme required environmental monitoring for air quality, noise and environmental site inspections for air quality, water quality, noise, waste management, ecology, and landscape and visual impact. The EM&A requirements for each parameter described in the following sections include:-

-       All monitoring parameters;

-       Monitoring schedules for the reporting month and forthcoming months;

-       Action and Limit levels for all environmental parameters;

-       Event / Action Plan;

-       Environmental mitigation measures, as recommended in the Project EIA study final report; and

-       Environmental requirement in contract documents.

 

2             AIR QUALITY MONITORING

2.1       Monitoring Requirements

2.1.1       In accordance with the updated EM&A Manual, baseline 1-hour and 24-hour TSP levels at 4 air quality monitoring stations were established. Impact 1-hour TSP monitoring was conducted for at least three times every 6 days, while impact 24-hour TSP monitoring was carried out for at least once every 6 days. The Action and Limit level of the air quality monitoring is provided in Appendix D.

2.2       Monitoring Equipment

2.2.1       24-hour TSP air quality monitoring was performed using High Volume Sampler (HVS) located at each designated monitoring station. The HVS meets all the requirements of the updated EM&A Manual.  Portable direct reading dust meters were used to carry out the 1-hour TSP monitoring.  Brand and model of the equipment is given in Table 2.1.

  Table 2.1          Air Quality Monitoring Equipment

Equipment

Brand and Model

Portable direct reading dust meter (1-hour TSP)

Sibata Digital Dust Monitor (Model No. LD-3 and LD-3B)

High Volume Sampler
(24-hour TSP)

Tisch Total Suspended Particulate Mass Flow Controlled High Volume Air Sampler (Model No. TE-5170 & GMW-2310)

 

2.3       Monitoring Locations

2.3.1       Monitoring locations AM2 and AM3 were set up at the proposed locations in accordance with updated EM&A Manual. However, for monitoring locations: Dynasty View and Tai Po Garden, proposed in the updated EM&A Manual, as approval could not be obtained from the owner¡¯s corporation of the premises, baseline and impact air quality monitoring was conducted at 13 Ha Wun Yiu (AM1) and Tai Kwong Secondary School (AM4) respectively. The monitoring station at 13 Ha Wun Yiu (AM1) was relocated to Fan Sin Temple, 3 Sheung Wun Yiu (AM1A) in February 2010. Also, the monitoring station at Tai Kwong Secondary School (AM4) was relocated to 168 Shek Kwu Lung Village (AM4A) in September 2011.

2.3.2       Figure 2.1 shows the locations of monitoring stations. Table 2.2 describes the details of the monitoring stations.

  Table 2.2          Locations of Impact Air Quality Monitoring Stations

Monitoring Station

Location

Description

AM1A

3 Sheung Wun Yiu

Ground floor at the boundary outside Fan Sin Temple

AM2

12 Shan Tong New Village

Ground floor outside the premises

AM3

Riverain Bayside

Roof of the switch room

AM4A

168 Shek Kwu Lung Village

Roof of the switch room

 

 

 

 

 

 

2.4       Monitoring Parameters, Frequency and Duration

2.4.1       Table 2.3 summarizes the monitoring parameters, frequency and duration of impact TSP monitoring.

 

  Table 2.3          Air Quality Monitoring Parameters, Frequency and Duration

Parameter

Frequency and Duration

1-hour TSP

Three times every 6 days while the highest dust impact was expected

24-hour TSP

Once every 6 days

 

2.5       Monitoring Methodology

2.5.1       24-hour TSP Monitoring

(a)           The HVS was installed in the vicinity of the air sensitive receivers.  The following criteria were considered in the installation of the HVS.

 

(i)             A horizontal platform with appropriate support to secure the sampler against gusty wind was provided.

(ii)            The distance between the HVS and any obstacles, such as buildings, was at least twice the height that the obstacle protrudes above the HVS.

(iii)           A minimum of 2 meters separation from walls, parapets and penthouse for rooftop sampler.

(iv)          A minimum of 2 meters separation from any supporting structure, measured horizontally.

(v)           No furnace or incinerator flues nearby.

(vi)          Airflow around the sampler was unrestricted.

(vii)         Permission was obtained to set up the samplers and access to the monitoring stations.

(viii)        A secured supply of electricity was obtained to operate the samplers.

(ix)          The sampler was located more than 20 meters from any dripline.

(x)           Any wire fence and gate, required to protect the sampler, did not obstruct the monitoring process.

(xi)          Flow control accuracy was kept within ¡À2.5% deviation over 24-hour sampling period.

 

(b)           Preparation of Filter Papers

 

(i)             Glass fibre filters, G810 were labelled and sufficient filters that were clean and without pinholes were selected.

(ii)            All filters were equilibrated in the conditioning environment for 24 hours before weighing. The conditioning environment temperature was around 25 ¡ãC and not variable by more than ¡À3 ¡ãC; the relative humidity (RH) was < 50% and not variable by more than ¡À5%. A convenient working RH was 40%.

(iii)           All filter papers were prepared and analysed by ALS Technichem (HK) Pty Ltd., which is a HOKLAS accredited laboratory and has comprehensive quality assurance and quality control programmes.

 

(c)           Field Monitoring

 

(i)             The power supply was checked to ensure the HVS works properly.

(ii)            The filter holder and the area surrounding the filter were cleaned.

(iii)           The filter holder was removed by loosening the four bolts and a new filter, with stamped number upward, on a supporting screen was aligned carefully.

(iv)          The filter was properly aligned on the screen so that the gasket formed an airtight seal on the outer edges of the filter.

(v)           The swing bolts were fastened to hold the filter holder down to the frame.  The pressure applied was sufficient to avoid air leakage at the edges.

(vi)          Then the shelter lid was closed and was secured with the aluminum strip.

(vii)         The HVS was warmed-up for about 5 minutes to establish run-temperature conditions.

(viii)        A new flow rate record sheet was set into the flow recorder.

(ix)          On site temperature and atmospheric pressure readings were taken and the flow rate of the HVS was checked and adjusted at around 1.1 m3/min, and complied with the range specified in the updated EM&A Manual (i.e. 0.6-1.7 m3/min).

(x)           The programmable digital timer was set for a sampling period of 24 hrs, and the starting time, weather condition and the filter number were recorded.

(xi)          The initial elapsed time was recorded.

(xii)         At the end of sampling, on site temperature and atmospheric pressure readings were taken and the final flow rate of the HVS was checked and recorded.

(xiii)        The final elapsed time was recorded.

(xiv)        The sampled filter was removed carefully and folded in half length so that only surfaces with collected particulate matter were in contact.

(xv)         It was then placed in a clean plastic envelope and sealed.

(xvi)        All monitoring information was recorded on a standard data sheet.

(xvii)       Filters were then sent to ALS Technichem (HK) Pty Ltd. for analysis.

 

(d)           Maintenance and Calibration

 

(i)             The HVS and its accessories were maintained in good working condition, such as replacing motor brushes routinely and checking electrical wiring to ensure a continuous power supply.

(ii)            5-point calibration of the HVS was conducted using TE-5025A Calibration Kit prior to the commencement of baseline monitoring. Bi-monthly 5-point calibration of the HVS will be carried out during impact monitoring.

(iii)           Calibration certificate of the HVSs are provided in Appendix E.

 

2.5.2       1-hour TSP Monitoring

(a)           Measuring Procedures

 

The measuring procedures of the 1-hour dust meter were in accordance with the Manufacturer¡¯s Instruction Manual as follows:-

(i)             Turn the power on.

(ii)            Close the air collecting opening cover.

(iii)           Push the ¡°TIME SETTING¡± switch to [BG].

(iv)          Push ¡°START/STOP¡± switch to perform background measurement for 6 seconds.

(v)           Turn the knob at SENSI ADJ position to insert the light scattering plate.

(vi)          Leave the equipment for 1 minute upon ¡°SPAN CHECK¡± is indicated in the display.

(vii)         Push ¡°START/STOP¡± switch to perform automatic sensitivity adjustment. This measurement takes 1 minute.

(viii)        Pull out the knob and return it to MEASURE position.

(ix)          Push the ¡°TIME SETTING¡± switch the time set in the display to 3 hours.

(x)           Lower down the air collection opening cover.

(xi)          Push ¡°START/STOP¡± switch to start measurement.

 

(b)           Maintenance and Calibration

 

(i)             The 1-hour TSP meter was calibrated at 1-year intervals against a continuous particulate TEOM Monitor, Series 1400ab. Calibration certificates of the Laser Dust Monitors are provided in Appendix E.

(ii)            1-hour validation checking of the TSP meter against HVS is carried out yearly at the air quality monitoring locations.

 

 

2.6          Monitoring Schedule for the Reporting Month

2.6.1       The schedule for environmental monitoring in January 2014 is provided in Appendix F.


 

2.7          Monitoring Results

2.7.1       The baseline condition of air quality in the Project site was reviewed in October and November 2009. A baseline monitoring of air quality, in terms of 1-hour Total Suspended Particulates (TSP) and 24-hour TSP, was carried out from 20 October 2009 to 4 November 2009 for 14 days. The baseline monitoring report was submitted by ETL and approved by the ER and the IEC on 9 November 2009. Action Levels for air quality were established and are summarized in Table 2.4, Table 2.5 and Appendix D.

2.8          Results and Observations

2.8.1       The monitoring results for 1-hour TSP and 24-hour TSP are summarized in Table 2.4 and 2.5 respectively. Detailed impact air quality monitoring results are presented in Appendix G.

Table 2.4          Summary of 1-hour TSP Monitoring Results in the Reporting Period

 

Average (mg/m3)

Range (mg/m3)

Action Level  (mg/m3)

Limit Level (mg/m3)

AM1A

81.6

74.6 ¨C 87.2

302.1

500

AM2

83.0

80.9 ¨C 86.3

301.9

500

AM3

82.0

78.4 ¨C 86.3

301.9

500

AM4A

82.5

78.5 ¨C 86.4

302.3

500

 

Table 2.5          Summary of 24-hour TSP Monitoring Results in the Reporting Period

 

Average (mg/m3)

Range (mg/m3)

Action Level  (mg/m3)

Limit Level (mg/m3)

AM1A

70.5

32.2 ¨C 119.6

176.6

260

AM2

59.7

31.0 ¨C 121.8

178.6

260

AM3

55.3

7.7 ¨C 118.7

193.1

260

AM4A

73.8

17.3 ¨C 130.3

198.5

260

                                                    

2.8.2       The major dust source in the reporting period included construction activities from Stage 1 of the Project, as well as nearby traffic emissions.

2.8.3       All 1-hour and 24-hour TSP results were below the Action and Limit Level at all monitoring locations in the reporting month.

2.8.4       The event action plan is annexed in Appendix J.

2.8.5       Weather information including wind speed and wind direction is annexed in Appendix H. The information was obtained from Hong Kong Observatory Sha Tin and Tai Mei Tuk Automatic Weather Station. As some of the weather data in January 2014 from the Tai Mei Tuk Automatic Weather Station were missing, the weather data from Tai Po Automatic Weather Station in January 2014 are included in Appendix H for supplementary purpose.


3             Noise MONITORING

3.1          Monitoring Requirements

3.1.1       In accordance with the EM&A Manual, impact noise monitoring was conducted for at least once per week during the construction phase of Stage 1 of the Project. The Action and Limit level of the noise monitoring is provided in Appendix D.

3.2          Monitoring Equipment

3.2.1       Noise monitoring was performed using sound level meter at each designated monitoring station.  The sound level meters deployed comply with the International Electrotechnical Commission Publications (IEC) 651:1979 (Type 1) and 804:1985 (Type 1) specifications.  Acoustic calibrator was deployed to check the sound level meters at a known sound pressure level.  Brand and model of the equipment is given in Table 3.1.

  Table 3.1          Noise Monitoring Equipment

Equipment

Brand and Model

Integrated Sound Level Meter

Rion NL-31 / B&K 2238 / B&K 2250-L

Acoustic Calibrator

Rion NC-73

 

3.3          Monitoring Locations

3.3.1       Monitoring stations NM3, NM6 and NM7 were set up at the proposed locations in accordance with updated EM&A Manual. However, for monitoring locations: Tai Po Garden (NM1), Dynasty View (NM2), Hong Kong Teachers¡¯ Association Lee Heng Kwei Secondary School (NM4) and Grand Palisades (NM5), proposed in the updated EM&A Manual, impact noise monitoring was conducted at alternative monitoring locations, as approval of access could not be obtained from the owner¡¯s corporation of the premises or the principal of the education institutes. The monitoring station at Tai Kwong Secondary School (NM1) was relocated to 168 Shek Kwu Lung Village (NM1A) in September 2011.

3.3.2       Figure 2.1 shows the locations of the monitoring stations. Table 3.2 describes the details of the monitoring stations.

  Table 3.2          Locations of Impact Noise Monitoring Stations

Monitoring Station

Location

Description

NM1A

168 Shek Kwu Lung Village

1m from the exterior wall of the village house

NM2

38 Ha Wun Yiu

1.2m from the ground floor free-field of the village house

NM3

Wong Shiu Chi Middle School

1m from the exterior of the roof top façade of the New Wing

NM4

Uptown Plaza

1m from the exterior of the roof top façade of Block 4

NM5

The Paragon

1m from the exterior of the roof top façade of the club house

NM6

PLK Tin Ka Ping Primary School

1.2m ground floor free-field near the entrance

NM7

Riverain Bayside

1m from the exterior of the roof façade of the switch room

 

3.4          Monitoring Parameters, Frequency and Duration

3.4.1       Table 3.3 summarizes the monitoring parameters, frequency and duration of impact noise monitoring.

Table 3.3          Noise Monitoring Parameters, Frequency and Duration

Parameter

Frequency and Duration

30-mins measurement at each monitoring station between 0700 and 1900 on normal weekdays. Leq, L10 and L90 would be recorded.

At least once per week

 

3.5          Monitoring Methodology

3.5.1       Monitoring Procedure

(a)           Façade measurements were made at all monitoring locations, except monitoring stations NM2 and NM6.

(b)           The sound level meter was set on a tripod at a height of 1.2 m above the ground for free-field measurements at NM2 and NM6.

(c)           The battery condition was checked to ensure the correct functioning of the meter.

(d)           Parameters such as frequency weighting, the time weighting and the measurement time were set as follows:-

(i)             frequency weighting: A

(ii)            time weighting: Fast

(iii)           time measurement: Leq(30-minutes) during non-restricted hours i.e. 07:00 ¨C 1900 on normal weekdays; Leq(5-minutes) during restricted hours i.e. 19:00 ¨C 23:00 and 23:00 ¨C 07:00 of normal weekdays, whole day of Sundays and Public Holidays

(e)           Prior to and after each noise measurement, the meter was calibrated using the acoustic calibrator for 94dB(A) at 1000 Hz.  If the difference in the calibration level before and after measurement was more than 1 dB(A), the measurement would be considered invalid and repeat of noise measurement would be required after re-calibration or repair of the equipment.

(f)            During the monitoring period, the Leq, L10 and L90 were recorded.  In addition, site conditions and noise sources were recorded on a standard record sheet.

(g)           Noise measurement was paused during periods of high intrusive noise (e.g. dog barking, helicopter noise) if possible. Observations were recorded when intrusive noise was unavoidable.

(h)           Noise monitoring was cancelled in the presence of fog, rain, wind with a steady speed exceeding 5m/s, or wind with gusts exceeding 10m/s.

 

3.5.2       Maintenance and Calibration

(a)           The microphone head of the sound level meter was cleaned with soft cloth at regular intervals.

(b)           The meter and calibrator were sent to the supplier or HOKLAS laboratory to check and calibrate at yearly intervals.

(c)           Calibration certificates of the sound level meters and acoustic calibrators are provided in Appendix E.

 

3.6          Monitoring Schedule for the Reporting Month

3.6.1       The schedule for environmental monitoring in January 2014 is provided in Appendix F.

3.7          Monitoring Results

3.7.1       The monitoring results for construction noise are summarized in Table 3.4 and the monitoring data is provided in Appendix I.

  Table 3.4          Summary of Construction Noise Monitoring Results in the Reporting Period

 

Average, dB(A),

Leq (30 mins)

Range, dB(A),

Leq (30 mins)

Limit Level, dB(A),

Leq (30 mins)

NM1A

61.7

60.3 ¨C 63.3

75

NM2

65.6

64.1 ¨C 67.3

75

NM3

62.6

61.4 ¨C 63.7

 70/65#

NM4

63.9

62.0 ¨C 66.1

75

NM5

62.8

53.7 ¨C 64.1

75

NM6

 62.7*

62.0 ¨C 63.4*

 70#

NM7

58.3

57.7 ¨C 58.8

75

              *+3dB(A) Façade correction included

# Limit Level of 70dB(A) applies to education institutes while 65dB(A) applies during school examination period.

3.7.2       No noise complaint related to 0700 ¨C 1900 hours on normal weekdays was received and followed up by the Environmental Team in the reporting period. Hence, no Action Level exceedance was recorded.

3.7.3       No noise monitoring result exceeding the Limit Level was recorded at all monitoring stations in the reporting month.

3.7.4       Major noise sources during the noise monitoring included construction activities of Stage 1 of the Project and nearby traffic noise and general school activities. 

3.7.5       The event action plan is annexed in Appendix J.


 

4             ENVIRONMENTAL SITE INSPECTION AND AUDIT

4.1          Site Inspection

4.1.1       Site Inspections were carried out on a weekly basis to monitor the implementation of proper environmental pollution control and mitigation measures for Stage 1 of the Project. In the reporting month, 5 site inspections were carried out on 3, 8, 15, 22 and 28 January 2014 for Contract 1 of the Project, and 4 site inspections for Contract 2 of the Project were carried out on 10, 16, 23 and 29 January 2014.

4.1.2       The environmental site inspections summaries are provided in Appendix K.

4.1.3       Particular observations during the site inspections for Contract 1 are described below:

Air Quality

 

4.1.4       Dry surfaces were observed on access roads near the site exit. The Contractor was reminded to spray water to maintain the entire surface wet and wash the wheels of vehicles before leaving the construction site.

Noise

 

4.1.5       No adverse observation was identified in the reporting month.

Water Quality

 

4.1.6       No adverse observation was identified in the reporting month.

Chemical and Waste Management

 

4.1.7       The Contractor was reminded to clear the construction waste at the waste skip.

Landscape and Visual Impact

 

4.1.8       No adverse observation was identified in the reporting month.

Miscellaneous

 

4.1.9       The Contractor was reminded to clear the stagnant water at the drip tray so as to prevent mosquito breeding.

4.1.10    Particular observations and reminder during the site inspections for Contract 2 are described below:

Air Quality

 

4.1.11    No adverse observation was identified in the reporting month.

 

Noise

 

4.1.12    The Contractor was reminded to wrap the breaker properly with sound-absorptive materials.

Water Quality

 

4.1.13    The Contractor was reminded to clear the muddy water at the wheel-washing facilities in Shek Kwu Lung.

Chemical and Waste Management

 

4.1.14    The Contractor was reminded to clear the refuse at the waste skip at G40A.

4.1.15    The Contractor was reminded to provide a drip tray to the chemical container on Lam Kam Flyover or remove the chemical container.

4.1.16    The Contractor was reminded to clear the general refuse inside and next to the rubbish bin.

Landscape and Visual Impact

 

4.1.17    No adverse observation was identified in the reporting month.

Miscellaneous

 

4.1.18    No adverse observation was identified in the reporting month.

 

4.2          Advice on the Solid and Liquid Waste Management Status

4.2.1       The Contract 1 Contractor (CSHK) and the Contract 2 Contractor (GCL) are registered as chemical waste producers for Stage 1 of the Project. C&D material sorting was carried out on site. Sufficient numbers of receptacles were available for general refuse collection.

4.2.2       As advised by the Contract 1 Contractor (CSHK), 189m3 of inert C&D materials was disposed of to the public fill at Tuen Mun 38 (of which 8m3 was broken concrete), while 163m3 of general refuse was disposed of at the NENT landfill. 84kg of paper/cardboard packaging, 3,652kg of plastics and 0kg of metals were collected by recycling contractors in the reporting month. 1,933m3 and 566m3 of inert C&D materials were reused on site and reused in NENT for backfilling purpose respectively. 0kg of chemical waste was collected by the licensed contractor in the reporting period.

4.2.3       As advised by the Contract 2 Contractor (GCL), 150m3 of inert C&D materials was disposed of to Tuen Mun 38 and 225m3 of general refuse was disposed of to the NENT landfill in the reporting period. No paper/cardboard packaging, plastics or metals was collected by the recycling contractors in the reporting month. 0m3 and 260m3 of inert C&D materials were reused on site and reused in other projects respectively Besides, no chemical waste was collected by the licensed contractor in the reporting period.

4.2.4       The Contract 1 Contractor (CSHK) and the Contract 2 Contractor (GCL) are advised to maintain on site waste sorting and recording system and maximize reuse / recycle of C&D wastes.

4.3          Environmental Licenses and Permits

4.3.1       The environmental licenses and permits for Stage 1 of the Project and valid in the reporting month is summarized in Table 4.1.

 


 

Table 4.1            Summary of Environmental Licensing and Permit Status

Statutory Reference

License/ Permit

License or Permit No.

Valid Period

License/ Permit Holder

Remarks

From

To

EIAO

Environmental Permit

 

EP-324/2008/A

 

31/01/2012

 

N/A

 

HyD

Tolo Highway/Fanling Highway between Island House Interchange and Ma Wo

WPCO

Discharge License (Office)

WT00005096-2009

03/12/2009

31/12/2014

CSHK

Discharge at Site Office

Discharge License (Site)

WT00005445-2009

15/12/2009

31/12/2014

CSHK

Discharge of Construction Runoff

Discharge License (Office)

WT00006782-2010

25/06/2010

30/06/2015

GCL

Discharge at Site Office

Discharge License (Site)

WT00007162-2010

09/08/2010

31/07/2015

GCL

Discharge of Construction Runoff

WDO

 

Chemical Waste Producer Registration

 

5213-727-C3249-46

25/09/2009

N/A

CSHK

Chemical waste produced in Contract HY/2008/09

5213-722-G2347-18

18/05/2010

N/A

GCL

Chemical waste produced in Contract HY/2009/08

WDO

Billing Account for Disposal of

Construction Waste

7009328

08/09/2009

N/A

CSHK

Waste disposal in Contract HY/2008/09

7010320

02/03/2010

N/A

GCL

Waste disposal in Contract HY/2009/08

 

 

NCO

Construction Noise Permit

GW-RN0468-13

19/08/2013

23/01/2014

CSHK

Routine Road Maintenance

GW-RN0561-13

02/10/2013

01/04/2014

CSHK

Modification of Sign Gantry_G11, G13, G70, G73, G74, G75 & G76

GW-RN0766-13

14/12/2013

23/02/2014

CSHK

Road Paving on Tolo Highway between Ma Wo and NLKRB
(Shatin Bound)

GW-RN0789-13

02/01/2014

31/03/2014

CSHK

Construction works next to MTRC's tracks protection zone

GW-RN0801-13

28/12/2013

23/02/2014

CSHK

Road Marking Alternation at Tolo Highway at
Island House Interchange

GW-RN0807-13

29/12/2013

23/02/2014

CSHK

Road pavement for Slip Road from Tolo Highway  to Tai Po Road near Yuen Chau Tsai
(Fanling Bound)

GW-RN0810-13

31/12/2013

23/02/2014

CSHK

Road Paving Reconstruction on
Slip Road from Tai Po Road-Yuen Chau Tsai

GW-RN0812-13

03/01/2014

25/03/2014

CSHK

Sign Gantry at Tolo Highway between Yuen Chau Tsai and Ma Wo

GW-RN0815-13

04/01/2014

23/02/2014

CSHK

Road Marking Alternation at Tolo Highway between Ma Wo and The Paragon
(Fanling Bound)

GW-RN0819-13

06/01/2014

28/02/2014

CSHK

Road Pavement at Island House on Normal Weekdays

GW-RN0822-13

11/01/2014

23/02/2014

CSHK

Road Paving on Tolo Highway between Grand Dynasty and The Paragon
 (Shatin Bound)

GW-RN0016-14

16/01/2014

28/02/2014

CSHK

Road pavement for Slip Road from Tolo Highway  to Tai Po Road near Yuen Chau Tsai
(Fanling Bound)

GW-RN0025-14

17/01/2014

28/02/2014

CSHK

Road Pavement at  Tolo Highway between Wan Tau Tong Estate and Tai Po Road
(Shatin Bound)

GW-RN0030-14

21/01/2014

28/02/2014

CSHK

Installation of Sign Gantries G18

GW-RN0031-14

23/01/2014

01/03/2014

CSHK

Road Resurfacing on Tolo Highway  between Ma Wo and Tai Po Road
(Fanling Bound)

GW-RN0039-14

27/01/2014

26/07/2014

CSHK

Construction wroks at Island House Interchange

GW-RN0058-14

29/01/2014

01/03/2014

CSHK

Modification of Sign Gantries_G13-17, 66-68 & 70

GW-RN0064-14

29/01/2014

01/03/2014

CSHK

Installation of Noise Barrier on Kwong Fuk West Viaduct

GW-RN0530-13

03/10/2013

02/02/2014

GCL

Renewal of GW-RN0194-13
Tolo Highway near Tai Po Tau Raw Water Pumping Station

GW-RN0695-13

17/11/2013

12/05/2014

GCL

General work and asphalt paving at Tolo Highway near Shek Kwu Lung and Ma Wo (CH18.1 - 19.2)

GW-RN0758-13

12/12/2013

27/02/2014

GCL

General Works at a section of Tolo Highway near Parc Versailles

GW-RN0785-13

28/12/2013

27/02/2014

GCL

Stitching Construction at Section of Tolo Highway (Shatin Bound) CH19 to CH18.8A

GW-RN0786-13

19/12/2013

11/06/2014

GCL

Renewal of GW-RN0484-13
Tolo Highway and Fanling Highway near Tai Po Tai Wo Road, Lam Kam Interchange & Tai Wo Service Road West

GW-RN0795-13

24/12/2013

27/02/2014

GCL

Erection of Sign Gantry at Tolo Highway (Fanling Bound) CH19.9 to CH20.1 near Lam Kam Interchange

GW-RN0817-13

04/01/2014

28/02/2014

GCL

Renewal of GW-RN0637-13
Erection of Sign Gantry at a section of Tai Po Tai Wo Road Uphill to Tolo Highway Northbound near Shek Kwu Lung

GW-RN0006-14

12/01/2014

23/02/2014

GCL

Lane Shifting at Tolo Highway CH19.8 - 17.95A near Ma Wo

GW-RN0018-14

15/01/2014

28/02/2014

GCL

Lane Shifting Works and Modification of Road Marking at Tolo Highway CH19.9 to CH20.3B

GW-RN0022-14

17/01/2014

29/03/2014

GCL

Installation of Sign Gantry G26 at Tolo Highway (Fanling Bound) CH19.55 to CH19.65B

GW-RN0023-14

18/01/2014

28/02/2014

GCL

Installation of Sign Gantry G25 at Tolo Highway (Fanling Bound) CH19.3 to CH19.5B

GW-RN0037-14

28/01/2014

12/04/2014

GCL

Erection of Sign Gantry G29 at Lam Kam Flyover (Fanling Bound) from CH21.0 to CH21.2B

GW-RN0052-14

26/01/2014

23/02/2014

GCL

Road Sections of Tolo Highway (South Bound) between Shek Kwu Lung and Dynasty View, Tai Po, New Territories

GW-RN0057-14

29/01/2014

28/02/2014

GCL

Tolo Highway (Fanling Bound) near Mun Shue Hang, Tai Po, New Territories

4.4          Implementation Status of Environmental Mitigation Measures

4.4.1       In response to the site audit findings, the Contractors carried out corrective actions.

4.4.2       A summary of the Implementation Schedule of Environmental Mitigation Measures (EMIS) is presented in Appendix C. Most of the necessary mitigation measures were implemented properly.

 

4.5          Summary of Exceedances of the Environmental Quality Performance Limit

4.5.1       All 1-hour and 24-hour TSP monitoring results complied with the Action / Limit Levels in the reporting period.

4.5.2       For construction noise, no Action and Limit Level exceedance was recorded at all monitoring stations in the reporting period.

 

4.6          Summary of Complaints, Notification of Summons and Successful Prosecutions

4.6.1       The Environmental Complaint Handling Procedure is annexed in Figure 4.1.

4.6.2       Two (2) new complaints and one (1) follow-up complaint were followed up by the Environmental Team in the reporting period.

4.6.3       One (1) noise-related complaint was received on 13 January 2014 and followed up by the Environmental Team in January 2014. The summary of investigation is described in Sections 4.6.3 to 4.6.5.

4.6.4       EPD referred a noise complaint on 13 January 2014 from a resident living in Grand Palisades at Tai Po. The complainant complained about the persistent construction noise emitted between late-night hours on Saturdays and early morning of Sundays at[n1] [n2]  Tolo Highway.

4.6.5       According to the information provided by the Contractor (China State Construction Engineering (HK) Ltd.) and confirmed by the Engineer of the Project[n3] , road resurfacing works were carried out at Tolo Highway over Shan Tong Road between 23:00 on 11 January 2014 and 07:00 on 12 January 2014.

 

A valid Construction Noise Permit (CNP no.: GW-RN0815-13) has been obtained for the use of certain specified Powered Mechanical Equipments (PMEs) and carrying out of certain prescribed construction work at Tolo Highway (Fanling Bound) between The Balmoral and The Paragon near Tat Wan Road between 23:00 on Saturdays and 07:00 on Sundays, subject to the conditions imposed in the CNP. All restricted hours works were supervised by senior staff of the Contractor and Representatives of the Engineer to ensure all CNP conditions were complied with. The list of plants used during the construction works (provided by the Contractor and confirmed by the Engineer) on 11 and 12 January 2014 was checked for verification.

 

Notification had been sent to the EPD on 9 January 2014 prior to the commencement of construction works before the said works was carried out at 23:00 on 11 January 2014.

 

Other Advance Notifications of Restricted-hour Construction Work to the EPD have also been attached since the complaint is concerned with persistent construction noise emitted. The notifications were sent to the EPD 2 days prior to the commencement of the said works.

 

The Contractor notified the nearby residents in advance of the construction work by disseminating a public notice to the estates management offices of the affected residential buildings on 6 November 2013.

 

The warning buzzer of the road miller used between 23:00 on 11 January 2014 and 00:30 on 12 January 2014 was enclosed that night to reduce noise impacts from the road resurfacing works.

 

However, the noise complaint is considered project-related.

 

Upon the receipt of the complaint, there has not been road resurfacing works under the CNP no.: GW-RN0815-13 being arranged at the same location at night since 11 and 12 January 2014.

 

Moreover, the Contractor was urged to shorten the time of handling rubbles as much as possible to minimize nuisance caused to the nearby residents. The Contractor has been setting up permanent noise barriers at both sides of the section of the road where road resurfacing works were carried out. Most of the noise barriers have been erected. The Contractor was prompted to install the remaining permanent noise barriers as soon as it can.

 

The Contractor met Mr Chan Siu-kuen, The Tai Po District Council Member, in the morning of 13 January 2014 to explain their works and progress. Mr Chan agreed to contact the complainant and the complainant has been satisfied with Mr Chan¡¯s explanations.

 

According to the Contractor, no further works in relation to CNP no.: GW-RN0607-13 is scheduled before the CNP expires at 07:00 on 23 February 2014, even though the CNP permits such prescribed use of the specified PMEs for a total of 6 nights during its validity period.

 

There are still outstanding works to be carried out at night in the coming months before the South Bound of Tolo Highway is open. However, the works will be less frequent and cause less impacts compared to those in previous months. The Contractor was urged to comply with conditions of existing and subsequent CNPs for future works and make advance notifications to the EPD at least 48 hours before the scheduled commencement of works. The Contractor was prompted to improve their management and schedule night works as early as possible to prevent late notification. The Contractor was reminded to review the current working method and implement noise mitigation measures so as to minimize nuisance caused to sensitive receivers.

 

In addition, the Contractor is advised to implement the mitigation measures as stated in ¡°Recommended Mitigation Measures¡± below:

 

-        Strictly comply with the requirements of the approved CNP for works carried out in restricted hours;

-        Have better scheduling of works to minimize noise nuisance;

-        Instruct the site workers to keep the noise in minimum during construction works in restricted hours; and

-        Foster better public relations with the sensitive receivers nearby.

 

4.6.6       One (1) air-and¨Cwater related complaint was received on 21 January 2014 and followed up by the Environmental Team in January 2014.

4.6.7       EPD referred a complaint on 21 January 2014.

The complainant drove via Tai Po Tai Wo Road section of Tolo Highway on 21 January 2014 morning. He observed a lot of muddy water generated from the Tolo Highway widening construction works. Besides, he saw from Google Earth Image Satellite that a pipe was used to draw water for ground washing, causing the outflow of muddy runoff. As the mud on the road becomes dry, dust is generated when vehicles are passing by.

The complainant requests follow-up as soon as possible.

4.6.8       As informed by the Contractor (Gammon Construction Ltd) and confirmed by the Engineer of the Project, concrete breaking at Bridge 15A North abutment was carried out at the work areas from 8:30am to 5:30pm on 21 January 2014.

 

Mitigation measures have been implemented in relation to water quality impact when construction activities are carried out. The measures include ensuring the works areas are well paved by concrete and keeping the paved area clean by sweeping to prevent mud and debris from depositing on the paved area. Besides, temporary channels are set up to control runoff.

 

Mitigation measures have been implemented in relation to dust control when construction activities are carried out. The measures include ensuring the works areas are well paved by concrete, wetting the breaking surfaces regularly for dust suppression of concrete breaking works and providing wheel washing of vehicles before vehicles leave the construction site.

 

With reference to the monitoring results recorded on the day closest to the day of complaint at the nearest EM&A monitoring station (AM4A- 168 Shek Kwu Lung Village), the 24-hour TSP level on 22 January 2014 was 96.1 ug/m3, which is below the action level of 176.6 ug/m3. Besides, the average 1-hour TSP level on 22 January 2014 at AM4A was 85.8 ug/m3, which is also below the action level of 302.3ug/m3.

 

The complaint was received by the Contractor at around 2:15pm on 21 January 2014 and site inspection was immediately carried out at 3 pm on the same day. Inspection was conducted along the concerned carriageway and no muddy water or mud trails were observed on both the carriageway and access gates. Moreover, referring to the complainant¡¯s description, the Google earth image was capturing the condition in April 2011, which is deviated from the current site situation. Although no muddy water was observed on 21 January 2014 afternoon, the Contractor was urged to monitor the road surfaces regularly and rectify whenever muddy water is observed by sweeping to prevent mud and debris from depositing on paved road areas.

 

Nevertheless, the complaint was considered project-related.

 

Therefore, the Contractor is reminded to enhance the water quality impacts and dust mitigation measures as stated in the ¡°Recommended Mitigation Measures¡± below:

 

-        Rectify the muddy water overflowing and propose preventive measures for muddy runoff;

-        Review the methodology of collecting the wheel washing water to prevent recurrence in the future;

-        Confirm the implementation of dust mitigation measures during all construction and dusty activities to minimize fugitive dust generation;

-        Maintain the frequency of environmental supervision (by the Contractor) to regularly review the adequacy and effectiveness of dust suppression measures to suit the construction progress;

-        Inform the complainant before dusty activities are carried out; and

-        Foster better public relations with the sensitive receivers and complainants nearby.

 

4.6.9       One (1) air-related follow-up complaint was received on 22 January 2014 and followed up by the Environmental Team in January 2014.

4.6.10    EPD referred a follow-up complaint from a resident of Ma Wo on 22 January 2014. The complaint is about the dust emission at the construction site of the Tolo Highway widening construction works at Ma Wo on 21 January 2014 afternoon and 22 January 2014 morning. The complainant complained that there was insufficient water spraying and tarpaulin sheets were not used. He expressed that the air pollution problem has caused nuisance to him for three years. He requests improvements by the Contractor and follow-up by the EPD.

4.6.11    As informed by the Contractor (Gammon Construction Ltd) and confirmed by the Engineer of the Project, slope trimming and U-channel construction were carried out in work area W36, and slope trimming was carried out in work areas W39-W40 on 21 and 22 January 2014.

The following mitigation measures have been done by the Contractor. The loading and unloading height of general fill materials was kept to a minimum. Wheel washing has been carried out at the site entrance. There have been water spraying by sprinklers on haul roads and exposed slopes, covering non-working slopes by tarpaulin sheets at a sight distance from the complainant before the complete construction of permanent footpath, full-time manual water spraying, and the tarpaulin dust screen of appropriately 1.8 m in height set on the top of W45-47 which is along W44 and NB31, and a section of footpath on W38. Water is sprayed manually to the leaves of the trees to minimize the emitted dust from dropping to the complainant¡¯s house and Ma Wo Tsuen through the trees. Besides, in case any dump truck passes through W45-47, the mechanical covering will not open until they reach the unloading point.

With reference to the monitoring results recorded on the day closest to the day of complaint at the nearest EM&A monitoring station (AM1A- Sheung Wun Yiu), the 24-hour TSP level on 21 January 2014 was 123.0 ug/m3, which was below the action level of 176.6 ug/m3. Besides, the average 1-hour TSP level 21 January 2014 at AM1A- Sheung Wun Yiu was 87.3 ug/m3, which was also below the action level of 302.3ug/m3.

Nevertheless, the complaint was considered project-related.

Therefore, the Contractor is reminded to enhance the dust mitigation measures as stated in the ¡°Recommended Mitigation Measures¡± below:

-        Confirm the implementation of dust mitigation measures (erection of tarpaulin dust screens along the work areas W38-48, spraying water manually by workers and sprinkler systems for the haul roads and exposed slopes at work areas W38-48, covering non-working slopes by tarpaulin sheets within the work areas, covering dusty materials carried in dump trucks within work areas W38-48) during all construction and dusty activities to minimize fugitive dust generation;

-        Increase the frequency of watering in the work areas (specially at the entrance of the construction site, and on site haul roads and exposed slopes / areas in the work areas W38-48), so that site haul roads and exposed surfaces are in a wet condition;

-        Cover the backfilling surface after work;

-        Keep soil surfaces wet before loading and unloading activities;

-        Maintain the frequency of the environmental supervision (by the Contractor) to regularly review the adequacy and effectiveness of dust suppression measures to suit the construction progress;

-        Inform the complainant before dusty activities (e.g. rock breaking, excavation, grouting and backfilling) are carried out; and

-        Foster better public relations with the sensitive receivers and complainants nearby.

 

4.6.12    No new notification of summons and prosecution was received in the reporting period.

4.6.13    Statistics on complaints, notifications of summons and successful prosecutions are summarized in Appendix L.


 

5             FUTURE KEY ISSUES

5.1          Construction Programme for the Coming Month

5.1.1       The major construction works for Contract 1 in February 2014 will be:-

-          Temporary shoring, sheetpiling and excavation

-          At-grade road construction

-          Retaining wall construction

-          Noise barrier footing construction

-          Noise barrier panels installation

-          Asphalt laying

-          Installation of drainage pipes

 

5.1.2       The major construction works for Contract 2 in February 2014 will be:-

-          Condition survey of existing structures

-          Setting up the temporary traffic arrangement

-          Excavation of trial trenches to locate existing utilities

-          Construction of haul road

-          Construction of concrete profile barrier and beam barrier

-          Construction of Pilecap / Spread footing of noise barriers / semi-noise enclosures

-          Slope works, including installation of soil nails

-          Noise barrier construction

-          Modification of existing bridge structures

-          Entrusted watermains works

-          Sewer Installation

-          Road and drainage works

-          Landscaping works

 

 

5.2          Key Issues for the Coming Month

5.2.1       Key issues to be considered in February 2014:-

-          Properly store and label oils and chemicals on site;

-          Chemical, chemical waste and waste management;

-          Collection of construction waste should be carried out regularly;

-          Site runoff should be properly collected and treated prior to discharge;

-          Properly maintain all drainage facilities and wheel washing facilities on site;

-          Exposed slopes should be covered up properly if no temporary work will be conducted;

-          Suppress dust generated from excavation, breaking and drilling activities, haul road traffic and grout mixing process;

-          Quieter powered mechanical equipment should be used;

-          Closely check and replace the sound insulation materials wrapped at the concrete breaker tip regularly;

-          Better scheduling of construction works to minimize noise nuisance; and

-          Tree protective measures for all retained trees should be well maintained.

 

5.3          Monitoring Schedule for the Coming Month

5.3.1       The tentative schedule for environmental monitoring in February 2014 is provided in Appendix F.

 

6             ConclusionS AND RECOMMENDATIONS

6.1          Conclusions

6.1.1       The construction phase and EM&A programme of Stage 1 of the project commenced on 23 November 2009.

6.1.2       1-hour TSP, 24-hour TSP and noise monitoring were carried out in the reporting period.

6.1.3       All 1-hour and 24-hour TSP monitoring results complied with the Action / Limit Levels in the reporting period.

6.1.4       No Action and Limit Level exceedance for construction noise was recorded at all monitoring stations in the reporting month.

6.1.5       Environmental site inspection was carried out 9 times in January 2014. Recommendations on remedial actions were given to the Contractors for the deficiencies identified during the site audits.

6.1.6       Two (2) new complaints and one (1) follow-up complaint were followed up by the Environmental Team in the reporting period.

6.1.7       One (1) noise-related complaint was received on 13 January 2014 and followed up by the Environmental Team in January 2014. The summary of investigation is described in Sections 4.6.3 to 4.6.5.

6.1.8       One (1) air-and¨Cwater related complaint was received on 21 January 2014 and followed up by the Environmental Team in January 2014. The summary of investigation is described in Sections 4.6.6 to 4.6.10.

6.1.9       One (1) air-related follow-up complaint was received on 22 January 2014 and followed up by the Environmental Team in January 2014. The summary of investigation will be described in the next reporting month.

 

6.1.10    No new notification of summons and prosecution was received in the reporting period.

 

6.2          Recommendations

6.2.1       According to the environmental site inspections performed in the reporting month, the following recommendations were provided:-

Air Quality Impact

l  The soil stockpiles should be properly covered.

l  The grouting station should be properly sheltered as one of the dust control measures

 

Construction Noise Impact

l  Properly erect the temporary noise barriers in accordance with the Environmental Permit requirement.

l  Noisy operations should be oriented to a direction away from sensitive receivers as far as possible.

l  Sound insulation materials shall be wrapped at the breaker tip for concrete breaking works.

 

Water Quality Impact

l  Preventive measures should be implemented to avoid the spread of mud trails on the public road.

l  Silty effluent should be treated/desilted before discharged. Untreated effluent should be prevented from entering public drain channel.

l  Proper drainage channels/bunds should be provided at the site boundaries to collect/intercept the surface run-off from works areas.

l  Stagnant water accumulated within works area should be removed.

 

Chemical and Waste Management

l  C&D materials and wastes, general refuse should be sorted properly and removed timely.

l  All chemical containers and oil drums should be properly stored.

l  All plants and vehicles on site should be properly maintained to prevent oil leakage.

l  All drain holes of the drip trays utilized within works areas should be properly plugged to avoid any oil leakage.

l  Oil stains on soil surface and empty chemical containers should be cleared and disposed of as chemical waste.

l  Drip tray should be provided to prevent oil leakage.

l  Only the recycling materials should be dumped into the appropriate recycling bins.

 

Landscape and Visual Impact

l  All retained trees should be properly fenced off at the works area.

 

 

 

 

 


 [n1]for the night before the complaint day? Please specify.

 [n2]

 [n3]We haven¡¯t asked the Engineer for confirmation in this case, right?