Issue No.             :           1

Issue Date            :           January 2011

Project No.          :           768

 

 

 

Joint User Complex and Wholesale Fish Market at Area 44, Tuen Mun

 

 

Final Environmental Monitoring & Audit Report

 

 

 

Prepared By:

 

Allied Environmental Consultants Ltd.

 

 

 

COMMERCIAL-IN-CONFIDENCE

 

 

 

 


Issue No.             :           1

Issue Date            :           January 2011

Project No.          :           768

 

 

 

Joint User Complex and Wholesale Fish Market at Area 44, Tuen Mun

 

 

Final Environmental Monitoring & Audit Report

 

 

 

Prepared By:

 

Allied Environmental Consultants Ltd.

 

 

 

COMMERCIAL-IN-CONFIDENCE

 

 

 

 

                Author:                                                                   

                                                Nic H. H. Lam

                                                BSc(Hons) AMHKIOA

 

 

 

 

Checked:                                                                                Approved:                                                            

Timothy W. H. Sze                                                            Grace M. H. Kwok

BEng(Hons) MEng                                                                BEng(Hons) MHKIEIA MHKIOA

                                                                                              MISWA MIAIA MRAPA LEED AP

                                                                                                                                            

 

 

This report has been prepared by Allied Environmental Consultants Limited with all reasonable skill, care and diligence within the terms of the Agreement with the client, incorporating our General Terms and Conditions of Business and taking account of the resources devoted to it by agreement with the client.

 

We disclaim any responsibility to the client and others in respect of any matters outside the scope of the above.

 

This report is confidential to the client and we accept no responsibility of whatsoever nature to third parties to whom this report, or any part thereof, is made known.  Any such party relies upon the report at their own risk.


Table of Contents

Table of Contents                                                                                                                                                                    i

List of Tables                                                                                                                                                                          ii

List of Figures                                                                                                                                                                        ii

List of Appendices                                                                                                                                                                 ii

EXECUTIVE SUMMARY                                                                                                                                                      1

1.    PROJECT BACKGROUND                                                                                                                                        3

1.1      Project Organization and Contact Personnel                                                                                                    3

1.2      Works Undertaken during the Construction Period                                                                                        4

2.    SENSITIVE RECEIVERS                                                                                                                                             8

3.    SUMMARY OF EM&A REQUIREMENT                                                                                                                  8

4.    MONITORING METHODOLOGY                                                                                                                          10

4.1      Monitoring Station Set Up                                                                                                                                10

4.2      Air Quality Monitoring                                                                                                                                      10

4.3      Noise Monitoring                                                                                                                                               10

5.    RESULTS                                                                                                                                                                     11

5.1.      Air Quality                                                                                                                                                           11

5.2.      Noise                                                                                                                                                                     11

5.3.      Weather Conditions                                                                                                                                           11

5.4.      Comparison of Monitoring Results                                                                                                                 15

6.    ADVICE ON SOLID AND LIQUID WASTE MANAGEMENT STATUS                                                         16

7.    Non-compliance, Complaints, Notifications of Summons and Successful Prosecutions           16

8.    IMPLEMENTATION  STATUS OF ENVIRONMENTAL MITIGATION MEASURES                                  16

9.    REVIEW                                                                                                                                                                       17

9.1.      Review of Effectiveness and Efficiency of the Mitigation Measures                                                        17

9.2.      Review of Environmental Monitoring Methodology and EM&A Programme                                         17

10.      CONCLUSIONS                                                                                                                                                     17


 

List of Tables

 

Table 1             Contact Details of Key Personnel

Table 2             Synopsis of Works Undertaken during the Entire Construction Period

Table 3 Action and Limit Level for Air Quality Impact Monitoring at Yuet Wu Villa

Table 4 Action and Limit Levels for Construction Noise Impact Monitoring

Table 5 Event Action Plan

Table 6 Noise Monitoring Equipment

Table 7 Summary of Weather Conditions during the Monitoring Period

Table 8 Comparison of EM&A data with EIA predictions

 

List of Figures

 

Figure 1            Site Location Plan

Figure 2            Location of Air Quality Monitoring Station

Figure 3            Location of Noise Monitoring Station

 

List of Appendices

 

Appendix A      Summary of 1-Hour TSP Monitoring Record

Appendix B      Summary of 24-Hour TSP Monitoring Record

Appendix C      Summary of Noise Monitoring Record

Appendix D      Implementation Status of Mitigation Measures

Appendix E      Certificate of Completion

 

 


 


EXECUTIVE SUMMARY

 

Allied Environmental Consultants Limited (AEC) has been appointed to conduct an environmental monitoring and audit (EM&A) program for the Joint User Complex and Wholesale Fish Market at Area 44, Tuen Mun. Major construction works of the Project were substantially completed in September 2010 and handover works were completed in November 2010, thus the EM&A programme would be terminated effective from 23rd December 2010.

 

This is the Final Environmental Monitoring and Audit (EM&A) Summary Report and this report summarizes the EM&A works performed at Joint User Complex and Wholesale Fish Market at Area 44, Tuen Mun from 31st July 2008 to 23rd December 2010.

 

Environmental Monitoring Works

 

Air Quality

 

No exceedance of 1-hour and 24-hour Total Suspended Particulates (TSP) was recorded.

During the course of the Construction Phase, both 1-hour and 24-hour TSP monitoring were conducted at the designated location.  No exceedances of Action Level and Limit Level of 24-hour TSP were recorded.

 

Noise

 

No exceedance of noise level was recorded.

During the course of the Construction Phase, weekly noise monitoring was undertaken at the designated location.  No exceedances of Action Level and Limit Level of noise level were recorded.

 

The environmental monitoring data collected during the construction period were generally well below the prediction of mitigated scenario in the approved Environmental Impact Assessment (EIA) Report and did not find any exceedances of action and limit level. It agrees with EIA predictions and the Project is environmentally acceptable.

 

Environmental Complaints and Prosecutions

 

During the construction period, there was a successful prosecution to W. Hing Construction Company Limited from EPD dated 9th November 2010 regarding the use of powered mechanical equipment, for the purpose of carrying out construction work other than percussive piling in respect of which a construction noise permit was not in force on 16th May 2010 at Joint-User complex and Wholesale Fish Market in Area 44, Tuen Mun, New Territories. As precautionary measures, the contractor had held a verbal briefing section on 17th May 2010 to all sub-contractors / foremen that no works / operation using powered mechanical equipments are allowed to be carried out during restricted hours between 1900 and 0700 hours and any time on a general holiday, including Sunday. The reason for the non-compliance was anticipated to be lack of supervision of carrying out construction work on Sunday.

 

There was one successful prosecution and no environmental complaint, warning and summons received since commencement of the Project.

 

Site Inspections

Mitigation measures had been implemented by the Contractor to minimize the environmental impacts due to construction activities.  Site inspections carried out by ET and IEC showed that the Contractor rectified most of the problems promptly, indicating the EIA process with its recommended mitigation measures and the EM&A programme were effective in protecting the environment.  As such, the environmental performance of the Contractor during the construction period was considered satisfactory.

 

The monitoring results and statistics of non-compliance indicated that the EIA process with its recommended mitigation and EM&A programme were effective for protection of the environment and there was no unacceptable environmental impact posed by the Project.

 


1.       PROJECT BACKGROUND

A Joint User Complex and Wholesale Fish Market (WFM Complex) at Area 44 in Tuen Mun is proposed to be designed and built by Architectural Services Department on behalf of Agriculture, Fisheries and Conservation Department, Marine Department, and Food and Environmental Hygiene Department of the Hong Kong SAR. The WFM Complex is to provide a permanent site for the relocation of the existing temporary wholesale fish market at Tuen Mun Area 27 and to accommodate a community hall and dragon boat racing spectator stand for public use. The proposed development is a 3-storey complex to accommodate the wholesale fish market at the ground floor, a community hall on the first and second floors, and an extensive landscaped deck on roof level. The proposed Wholesale Fish Market is categorized as a designated project under the Environmental Impact Assessment Ordinance (EIAO) and therefore a detailed Environmental Impact Assessment (EIA-085/2002) has been conducted in year 2002 and an Environmental Permit (EP-296/2007) was issued by Environmental Protection Department in December 2007.

 

The subject site is located at Castle Peak Bay of Tuen Mun given in Figure 1. The subject site is bounded to the north by a future local open space presently used as a temporary car park, to the east by Castle Peak Bay typhoon shelter, to the south by a future lorry park and to the west by Wu Shan Road. Yuet Wu Villa being the nearest residential establishment is located at around 85m from the site boundary.

 

1.1       Project Organization and Contact Personnel

 

Key personnel and contact particulars are summarized in Table 1.

 

Table 1            Contact Details of Key Personnel

 

Role

Department / Company

Names

Contact Number

Fax Number

Lead User Department

Agriculture, Fisheries, and Conservation Department

Mr. K.H. Chan

Ms. Louise Li

2150 7092

2150 7104

2314 2866

 

Environmental Permit Holder

Architecture Services Department

Mr. S.W. Chow

Ms. Susana Chan

2867 3716

2867 3706

2523 9622

 

Architect

P&T Architects and Engineers Ltd.

Ms. Sarah Ng

Ms. Vivian Law

2835 3548

2832 3046

2891 3834

 

Main Contractor

W. Hing Construction Co. Ltd.

Mr. Andy Chan

Mr. Jim Lee

9630 7404

6105 4076

8343 9188

Environmental Team Leader

Allied Environmental Consultants Ltd.

Ms. Grace Kwok

2815 7028

2815 5399

Independent Environmental Checker

Cinotech Consultants Ltd.

Dr. Priscilla Choy

2151 2089

3107 1388

 


 

1.2       Works Undertaken during the Construction Period

 

The synopsis of work undertaken during the entire construction period is summarized in Table 2.

 

Table 2            Synopsis of Works Undertaken during the Entire Construction Period

 

Month

Works Undertaken

Aug 2008

-         Preboring works

-         Jack piling works

-         Drainage diversion works

Sept 2008

-         Pre-boring works

-         Jack piling works

-         Drainage diversion works

Oct 2008

-         Pre-boring works

-         Jack piling works

-         Drainage diversion works

Nov 2008

-         Jack piling works

-         Drainage diversion works

Dec 2008

-         Jack piling works

-         Drainage diversion works

Jan 2009

-         Underground foundation works

-         Drainage diversion works

Feb 2009

-         Foundation works

-         Underground drainage works

Mar 2009

-         ELS and pile cap construction

-         Underground building services

-         ELS and concrete footing for tower crane

-         Ground floor superstructure

Apr 2009

-         Pile cap and ELS construction

-         Underground building services

-         Ground floor superstructure

-         Tower crane erection

May 2009

-         ELS and pile cap construction

-         U/G, G/F - M/F, G/F - 1/F E&M works construction

-         G/F - M/F, G/F - 1/F superstructure

Jun 2009

-         ELS and pile cap construction

-         U/G, G/F - M/F, G/F - 1/F E&M works construction

-         G/F - M/F, G/F - 1/F superstructure

Jul 2009

-         Construction of superstructure (wall/ column/ slab) from G/F to M/F, G/F to 1/F

-         Installation of concealed E&M conduit to wall/ slab

-         U/G drainage works

-         Manhole connection work

-         Construction of G/F on-grade slab

Aug 2009

-         Formwork and rebar fixing for superstructure (G/F to M/F, G/F to 1/F)

-         Underground services installation

-         Concreting to superstructure

-         Installation of conceal E&M services conduit

-         Construction of ground structure slab

Sept 2009

-         Construction of superstructure from M/F to 1/F along GL 1-10/A-L

-         Construction of superstructure from G/F to M/F along GL 15-17/C-L, 13-17/ A-C

-         Construction of superstructure from G/F to 1/F along GL 10-13/B-L

-         Installation of concealed E&M service conduit to superstructure (wall and slab)

Oct 2009

-         Construction of superstructure from G/F to M/F and M/F to 1/F

-         Installation of E&M services concealed conduit to wall and slab of superstructure

-         Construction of underground E&M services

Nov 2009

-         Construction of superstructure from M/F to 1/F, 1/F to 2/F

-         Installation of E&M services concealed conduit to wall and slab of superstructure

-         Construction of underground E&M services

Dec 2009

-         Construction of superstructure at 1/F, 2/F & R/F

-         Wall rendering at G/F and M/F

-         Erection of block wall at G/F

-         1st fixing of E&M ceiling services

-         Erection of bamboo scaffolding

-         Installation of concealed E&M service pipe to superstructure

Jan 2010

-         Construction of superstructure

-         Installation of concealed E&M services

-         1st fixing of E&M services, Finishing Works 

-         Installation of Metal Truss at Roof

-         Last Manhole Construction

-         Connection Works

Feb 2010

-         Construction of superstructure

-         Installation of metal roof, internal & external wall & ceiling rendering and plastering

-         Floor screeding

-         Installation of metal works

-         1st fixing of E&M services

-         Erection of bamboo scaffolding

-         Last manhole connection

-         Internal waterproofing works, internal wall & ceiling wall painting

-         Installation of window & louver; and installation of door frame

Mar 2010

-         Internal & external finishing works

-         Installation of metal roof, waterproofing works

-         1st & final fixing of E&M works, steel & metal works

-         Connection of U/G drainage pipe along G/F landscape plaza

-         Construction of on-grade slab along G/F fish market

-         Timber & metal door frame installation

-         window & louvre installation

-         Lift installation

Apr 2010

-         Construction of hollow on-grade slab

-         Internal & external finishing works

-         Waterproofing works

-         Steel & metal works

-         Construction of underground drainage system

-         Installation of Kalzip Roof system

-         Connection & construction of manhole along Wu Shan Road

-         1st & 2nd fixing of E&M services 

-         Lift installation

May 2010

-         Laying of floor screed at G/F Carpark & Fish Market

-         Internal wall/ floor/ ceiling finish

-         Laying of floor screed/ washed grano at 1/F landscape deck & spectator stand

-         Laying of external floor tile at 2/F

-         External waterproofing works

-         Installation of aluminium louvre & window

-         Installation of timber door & metal door

-         Installation of general metal works

-         Installation of Kalzip roof system

-         External wall spray painting

-         2nd / final fixing of E&M services

-         Construction of underground drainage works at G/F landscape plaza

-         Dismantling of hoarding

-         Installation of fender

-         Installation of recycle plastic for architecture feature

-         Laying of planter sub-soil drain & aggregate

-         Connection of sewage manhole along Wu Shan Road

Jun 2010

-         Construction of G/F RC planter wall

-         Minor concreting works

-         Internal finishing works

-         Installation of Kalzip Roof

-         C&J installation works

-         Metal works installation

-         Laying of underground drain pipe at G/F Entrance Plaza

-         Dismantling of hoarding

-         Last manhole connection works

-         Installation of fender

-         Dismantling of bamboo scaffolding

-         External landscape works

-         2nd or final fixing for E&M services works

-         T&C for E&M services works

Jul 2010

-          Internal and external finishing works

-          External landscape works

-          Installation of Kalzip Roof

-          Installation of metal works

-          Installation of carpentery & joinery works

-          Second and/ or final fixing of E&M works

-          Last manhole connection works & reinstatement of pavement (XP works along Wu Shan Road)

-          Installation of fender

-          Rebar fixing, erection of formwork & concreting to minor RC structure

-          Dismantling of hoarding

-          Dismantling of bamboo scaffolding

-          Installation of Spectator Stand seating

-          Installation of jib crane

-         Installation of Ice/ Cold Store

Aug 2010

-         Stormwater last manhole connection along Wu Shan Road

-         Reinstatement of concrete pavement along Wu Shan Road

-         Installation of steel & metal works

-         Installation of joinery & carpentary works

-         Internal & external finishing works

-         Landscaping works

-         Plumbing & drainage works

-         E&M final fixing & T&C works

Sept 2010

-         Defects rectification for internal / external finishing works

-         Construction of additional planter RC wall

-         Installation of minor steel & metal works

-         Installation of joinery & carpentery works

-         Planting work by ASD term contractor

-         Installation of signage works

-         Water tightness test for kalzip roof

-         Handover preparation works

-         Installation of additional E&M services works

Oct 2010

-         Defects rectification for internal / external finishing works

-         Installation of additional / variation E&M works

-         Preparation works for handover to end user

Nov 2010

-         Defects rectification for internal / external finishing works

-         Installation of additional / variation of E&M works

-         Preparation works for handover to end user

 

 


2.       SENSITIVE RECEIVERS

 

Air Sensitive Receivers (ASRs) within 500m include Yuet Wu Villa, Lawn Bowling Field, Tennis Court, which are less than 100m away from the subject site. Tuen Mun Wu Hong Clinic is located to the west at about 100m to the site boundary. Two secondary schools, namely Ka Chi Secondary School and South Tuen Mun Government Secondary School, are approximately 300m to the south of the site boundary.

 

Noise Sensitive Receivers (NSRs) within 300m are Yuet Wu Villa, Siu Hei Court, Yan Chai Hospital Low Chan Chor Si Primary School and Wu King Estate. The nearest NSR will be Block 15 of Yuet Wu Villa.

 

3.       SUMMARY OF EM&A REQUIREMENT

 

For regular impact monitoring, the sampling frequency of at least once in every six-days, shall be strictly observed at the monitoring station for 24-hour TSP monitoring.  For 1-hour TSP monitoring, the sampling frequency of at least three times in every six-days should be undertaken when the highest dust impact occurs. For noise monitoring, one set of measurement between 0700-1900 hours on normal weekdays. Leq(30 min) shall be used as the monitoring parameter. 

 

From baseline monitoring results, the proposed Action and Limit Levels for air quality are summarized in Table 3. The average baseline 1-hour TSP value of 129μg/m3 and 24-hour TSP value of 65μg/m3 measured at Block 15, Yuet Wu Villa was used to determine the action and limit level for air quality impact monitoring. The proposed Action and Limit Levels for construction noise are summarized in Table 4.

 

Table 3            Action and Limit Level for Air Quality Impact Monitoring at Yuet Wu Villa

 

Parameters

Baseline Level (μg/m3)

Action Level (μg/m3)

Limit Level (μg/m3)

24-Hour TSP Level

65

173

260

1-Hour TSP Level

129

334

500

 


Table 4            Action and Limit Levels for Construction Noise Impact Monitoring

 

Time Period

Action Level

 Limit Level

Daytime (0700-1900 hours) on weekdays

When one documented compliant is received

Dwelling 75dB(A)1

School 70dB(A)1

(65dB(A) during examinations)1

1900-2300 on any day and 0700-2300 on Sunday and general holidays, for use of PME2

When one documented compliant is received

65dB(A)3

All days during the night-time (2300-0700 hours) 2

When one documented compliant is received

50dB(A)3

Note: 1. Construction noise criteria stipulated in the TM-EIAO

2. A Construction Noise Permit (CNP) shall be required for the carrying out of the construction work during the restricted hours (1900-2300 on any day and 0700-2300 on Sunday and general holidays, for use of PME; and All days during the night-time (2300-0700 hours))

3. Area sensitivity rating of the monitoring location is “B”.

 

Should non-compliance of the above Action and Limit levels occurs, the contractor shall undertake corresponding action in accordance with the proposed Event Action Plan given in EM&A Manual. A summarized general Event Action Plan is given in Table 5. Details should be referred to the Event Action Plan in the EM&A Manual.

 

Table 5            Event Action Plan

 

Level

Step 1

Step 2

Step 3

Action

l  Identify source

l  Check monitoring data and working methods

l  Contact project manager to discuss and implement remedial action

l  Rectify any unacceptable practice

l  Amend working methods if appropriate

l  If exceedance continues, commence additional monitoring

l  Notify client/project manager following correct of the situation

l  Cease additional monitoring if exceedance stops

Limit

l  Identify source

l  Notify client/project manager

l  Check monitoring data and working methods

l  Repeat measurement to confirm finding

l  Commence additional monitoring

l  Take immediate action to avoid further exceedance

l  Submit proposal for remedial actions to client/project manager within 3 working days

l  Implement the agreed proposal

l  If exceedance continues, amend and resubmit the proposal

l  Notify client/project manager following correction of the situation

l  Cease additional monitoring if exceedance stops

 

4.       MONITORING METHODOLOGY

4.1       Monitoring Station Set Up

 

Air quality monitoring and noise monitoring were conducted at Block 15, Yuet Wu Villa. Air quality monitoring station was set up at the roof top of the residential block and noise monitoring was conducted at 1.2m above ground level in front of the residential block and at the junction of Wu Sau Street and Wu On Street as given in Figures 2 and 3.

 

4.2       Air Quality Monitoring

 

1-hour and 24-hour TSP air quality monitoring was conducted at the designated air quality monitoring location using a High Volume TSP Sampler (Model No: Anderson GMWS-2310 ACCU-VOL) at the designated location. 24-hour TSP samples were taken every six days. 1-hour TSP samples were taken three times a day between 0700-1900 hours.  The weighing of the filter paper used in the monitoring was undertaken by ALS Laboratory Group Environmental Division. (HOKLAS Registration No.: 066)

 

4.3       Noise Monitoring

 

Noise monitoring was conducted at the designated noise monitoring location between 0700-1900 hours using a sound level meter which complies with the International Electrotechnical Commission Publications 651:1979 (Type 1) and 804:1985 (Type 1). Noise instrumentation details are given in Table 6.

 

Table 6            Noise Monitoring Equipment

 

Manufacturer

Type/Model No.

Equipment

RION

Model NL 31

Precision Sound Level Analyzer with windshield

RION

Model NC 73

Calibrator

 

Noise levels measurements were recorded in terms of thirty minutes A-weighted equivalent continuous sound pressure level (Leq(30min)) on a weekly basis. The sound level meter was calibrated immediately prior to and following each noise measurement. The meter was mounted on a tripod at a height of 1.2m and the microphone was positioned at 1m away the building façade of the noise monitoring station facing the construction site.

 

Noise measurements were not made in the presence of fog, rain, and wind with a steady speed exceeding 5m/s or wind with gusts exceeding 10m/s. The wind speed was checked with a portable anemometer capable of measuring the wind speed in m/s.


 

5.       RESULTS

5.1.       Air Quality

 

No exceedance was recorded in the whole construction period. Graphical plots of air quality monitoring record of 1-hour TSP levels and 24-hour TSP levels in comparison with baseline data are provided in Appendices A and B. Air monitoring results measured in October and November 2010 returned to ambient environmental conditions in comparison with baseline data. Therefore, no adverse environmental impacts to the surroundings are anticipated.  The EPD agreed the completion of construction works and air monitoring of construction phase was completed in November 2010.  

 

5.2.       Noise

 

Noise monitoring results in terms of Leq(30min), L10(30min) L90(30min) were measured at the designated noise monitoring location. L10 and L90 represent sound levels that are exceeded 10% and 90% of the time respectively. Normally, L10 measurements can be considered as the average peak levels, whilst L90 levels can be considered as the average background noise levels.

 

No exceedance was recorded in the whole construction period. Graphical plot of noise monitoring record in comparison with baseline data is provided in Appendix C. Noise monitoring results measured in October and November 2010 returned to ambient environmental conditions in comparison with baseline data. Therefore, no adverse environmental impacts to the surroundings are anticipated. The EPD agreed the completion of construction works and noise monitoring of construction phase was completed in November 2010.

 

5.3.       Weather Conditions

 

Weather data of the monitoring station were obtained from the nearest Hong Kong Observatory (HKO) Tuen Mun automatic weather station located at Tuen Mun Town Park (63 mPD).Table 7 summarizes the wind data during the monitoring dates.

 

 

 


 Table 7           Summary of Weather Conditions during the Monitoring Period

 

Date

Weather

Prevailing Wind Direction

Daily Average Wind Speed (m/s)

1 Aug 2008

Cloudy

SSE

2.71

7 Aug 2008

Cloudy

SSE

4.47

13 Aug 2008

Sunny

SW

1.96

19 Aug 2008

Sunny

SSE

2.68

25 Aug 2008

Sunny

SSE

3.54

30 Aug 2008

Sunny

SW

1.94

5 Sept 2008

Sunny

S

1.78

11 Sept 2008

Sunny

NW

1.78

17 Sept 2008

Sunny

SE

2.03

23 Sept 2008

Cloudy

N

3.51

29 Sept 2008

Sunny

NE

4.14

4 Oct 2008

Sunny

SE

4.42

10 Oct 2008

Sunny

N

1.87

16 Oct 2008

Sunny

NE

1.45

22 Oct 2008

Sunny

S

2.07

28 Oct 2008

Sunny

SE

2.67

3 Nov 2008

Cloudy

NE

2.66

8 Nov 2008

Sunny

N

3.66

14 Nov 2008

Sunny

N

1.93

20 Nov 2008

Sunny

NE

3.07

26 Nov 2008

Sunny

N

2.34

2 Dec 2008

Sunny

S

2.22

8 Dec 2008

Sunny

N

2.20

13 Dec 2008

Cloudy

N

1.83

19 Dec 2008

Sunny

SE

1.78

23 Dec 2008

Sunny

NE

2.78

29 Dec 2008

Cloudy

NE

2.80

3 Jan 2009

Sunny

N

1.61

9 Jan 2009

Sunny

N

3.20

15 Jan 2009

Sunny

N

1.85

21 Jan 2009

Cloudy

N

1.47

29 Jan 2009

Cloudy

NW

1.75

4 Feb 2009

Sunny

S

2.11

10 Feb 2009

Sunny

SW

1.57

16 Feb 2009

Cloudy

S

2.97

21 Feb 2009

Sunny

SE

4.09

27 Feb 2009

Cloudy

S

2.41

5 Mar 2009

Cloudy

SE

2.91

11 Mar 2009

Cloudy

S

2.66

17 Mar 2009

Sunny

SE

2.29

23 Mar 2009

Cloudy

S

2.59

28 Mar 2009

Cloudy

SW

2.01

3 Apr 2009

Cloudy

S

2.44

9 Apr 2009

Sunny

SE

2.48

15 Apr 2009

Sunny

S

2.92

21 Apr 2009

Cloudy

NE

3.33

27 Apr 2009

Cloudy

SE

3.17

4 May 2009

Sunny

S

2.53

9 May 2009

Sunny

SE

3.74

15 May 2009

Sunny

SE

2.82

21 May 2009

Cloudy

S

2.19

27 May 2009

Cloudy

SE

3.54

2 Jun 2009

Cloudy

SE

4.15

8 Jun 2009

Cloudy

SE

4.48

13 Jun 2009

Cloudy

SE

1.93

19 Jun 2009

Cloudy

SE

2.34

25 Jun 2009

Cloudy

SE

3.13

2 Jul 2009

Sunny

SW

3.30

8 Jul 2009

Sunny

SE

2.21

14 Jul 2009

Cloudy

S

2.80

20 Jul 2009

Cloudy

SE

4.23

25 Jul 2009

Cloudy

SE

2.98

31 Jul 2009

Cloudy

SE

3.16

6 Aug 2009

Cloudy

SE

3.81

12 Aug 2009

Cloudy

S

1.60

18 Aug 2009

Fine

Maintenance*

Maintenance*

24 Aug 2009

Sunny

SE

1.93

29 Aug 2009

Sunny

S

1.78

4 Sep 2009

Sunny

SE

2.56

10 Sep 2009

Fine

NE

2.79

16 Sep 2009

Cloudy

SE

3.55

22 Sep 2009

Sunny

NE

3.36

28 Sep 2009

Cloudy

NE

3.18

2 Oct 2009

Sunny

N

1.98

8 Oct 2009

Sunny

SE

2.24

14 Oct 2009

Rainy

NE

2.14

20 Oct 2009

Cloudy

NE

2.01

27 Oct 2009

Sunny

SE

3.21

2 Nov 2009

Sunny

NE

4.92

7 Nov2009

Cloudy

S

2.19

13 Nov 2009

Cloudy

N

3.28

19 Nov 2009

Sunny

N

2.90

25 Nov 2009

Sunny

S

1.18

1 Dec 2009

Sunny

N

2.09

7 Dec 2009

Cloudy

N

1.50

12 Dec 2009

Sunny

S

2.51

18 Dec 2009

Cloudy

NE

3.76

24 Dec 2009

Sunny

N

1.15

30 Dec 2009

Cloudy

NE

1.35

5 Jan 2010

Cloudy

SE

2.73

11 Jan 2010

Cloudy

N

2.14

16 Jan 2010

Sunny

N

0.86

22 Jan 2010

Cloudy

NE

1.57

28 Jan 2010

Cloudy

N

0.02

3 Feb 2010

Cloudy

S

1.79

9 Feb 2010

Cloudy

SE

3.90

12 Feb 2010

Cloudy

NE

3.75

18 Feb 2010

Cloudy

NE

3.11

24 Feb 2010

Cloudy

SE

3.76

2 Mar 2010

Cloudy

SE

2.16

8 Mar 2010

Cloudy

N

1.72

13 Mar 2010

Cloudy

N

0.30

19 Mar 2010

Sunny

SE

1.46

25 Mar 2010

Cloudy

N

3.89

31 Mar 2010

Cloudy

SE

2.82

7 Apr 2010

Cloudy

S

2.22

13 Apr 2010

Sunny

SE

3.67

19 Apr 2010

Sunny

SW

2.33

24 Apr 2010

Sunny

SE

3.41

30 Apr 2010

Cloudy

S

2.49

6 May 2010

Cloudy

S

2.22

12 May 2010

Sunny

SE

3.67

18 May 2010

Cloudy

SW

2.33

24 May 2010

Sunny

SE

3.41

29 May 2010

Cloudy

S

2.49

4 Jun 2010

Cloudy

N

1.82

10 Jun 2010

Cloudy

W

0.89

15 Jun 2010

Cloudy

S

3.34

21 Jun 2010

Cloudy

SE

2.80

26 Jun 2010

Cloudy

SE

2.38

2 Jul 2010

Sunny

S

2.13

8 Jul 2010

Sunny

S

2.97

14 Jul 2010

Sunny

SE

2.14

20 Jul 2010

Sunny

SE

2.74

26 Jul 2010

Sunny

SE

2.52

31 Jul 2010

Sunny

SE

3.45

6 Aug 2010

Sunny

N

2.03

12 Aug 2010

Sunny

SE

2.94

18 Aug 2010

Sunny

N

1.74

24 Aug 2010

Cloudy

SE

1.95

30 Aug 2010

Sunny

N

1.97

4 Sept 2010

Cloudy

SE

2.92

10 Sept 2010

Cloudy

N

1.78

16 Sept 2010

Sunny

SE

1.85

22 Sept 2010

Cloudy

SE

2.60

28 Sept 2010

Sunny

SE

2.25

4 Oct 2010

Cloudy

NE

3.55

9 Oct 2010

Cloudy

N

1.52

15 Oct 2010

Cloudy

NE

3.61

21 Oct 2010

Cloudy

N

3.36

27 Oct 2010

Sunny

NE

4.27

2 Nov 2010

Sunny

N

2.10

8 Nov 2010

Sunny

NE

1.85

13 Nov 2010

Sunny

N

2.31

19 Nov 2010

Sunny

Maintenance*

Maintenance*

25 Nov 2010

Sunny

N

2.19

Remarks: *The HKO Tuen Mun automatic weather station is under maintenance on that day.

 

5.4.       Comparison of Monitoring Results

 

During the construction period, the monitoring results did not show major variations due to the construction activities being carried out and weather conditions. The EM&A data was compared with the EIA predictions as summarized in Table 8.

 

Table 8            Comparison of EM&A data with EIA predictions

 

Parameters

Predicted Level in EIA Report

Measured Level from EM&A data

Mitigated maximum 1-hour average TSP concentration

147.4 μg/m3

226.0μg/m3

Mitigated maximum 24-hour average TSP concentration

110.3 μg/m3

110.0μg/m3

Mitigated maximum construction noise level

L eq (30min) of 73 dB(A)

L eq (30min) of 65.7 dB(A)

 

The maximum 24-hour average TSP concentration and maximum construction noise level collected during the construction period were generally well below the prediction of mitigated scenario in the approved Environmental Impact Assessment (EIA) Report and did not find any exceedances of action and limit level. However, the maximum 1-hour average TSP concentration collected during the construction period exceeds the prediction of mitigated scenario in the approved Environmental Impact Assessment (EIA) Report but did not exceed the action and limit level.

 

The discrepancy between the EM&A data and EIA predictions is probably due to the construction of the Junior Police Officers' Married Quarters at Wu Hong Street, which is 110m away from the monitoring location. The construction works from Junior Police Officers' Married Quarters can be a major source of the noise and TSP generation during the monitoring period from 31st July 2008 to 31st March 2010. Refer to Appendices A to C; the measured level from EM&A data was lower down since completion of construction works of Junior Police Officers' Married Quarters.

 

After completion of major construction works of the Project, the measured air and noise monitoring results returned to levels similar to that recorded during baseline monitoring. Therefore, no adverse environmental impacts to the surroundings are anticipated.  As the monitored parameters were far below the Action and Limit Level under mitigation measures, the Project is considered environmentally acceptable.

 

6.       ADVICE ON SOLID AND LIQUID WASTE MANAGEMENT STATUS

 

The solid waste generated from the Project included inert and non-inert C&D waste.  Sorting and recycling of materials was encouraged at the site.  A total of 29,470.21 tonnes of inert C&D material was disposed of at public fill. A total of 1,635.41 tonnes of waste including general refuse and non-inert C&D wastes were disposed of to landfill. The effluent discharge was disposed of according to the water discharge licence.

 

7.       Non-compliance, Complaints, Notifications of Summons and Successful Prosecutions

During the construction period, there was a successful prosecution to W. Hing Construction Company Limited from EPD dated 9th November 2010 regarding the use of powered mechanical equipment, for the purpose of carrying out construction work other than percussive piling in respect of which a construction noise permit was not in force on 16th May 2010 at Joint-User complex and Wholesale Fish Market in Area 44, Tuen Mun, New Territories. As precautionary measures, the contractor had held a verbal briefing section on 17th May 2010 to all sub-contractors / foremen that no works / operation using powered mechanical equipments are allowed to be carried out during restricted hours between 1900 and 0700 hours and any time on a general holiday, including Sunday. The reason for the non-compliance was anticipated to be lack of supervision of carrying out construction work on Sunday.

 

There was one successful prosecution and no environmental complaint, warning and summons received since commencement of the Project.

 

8.       IMPLEMENTATION  STATUS OF ENVIRONMENTAL MITIGATION MEASURES

The Contractor implemented mitigation measures to minimize the environmental impacts due to construction activities. The implementation status of environmental mitigation measures is given in Appendix D.

 


 

9.       REVIEW

9.1.       Review of Effectiveness and Efficiency of the Mitigation Measures

The environmental monitoring results indicated that the construction activities in general were in compliance with the relevant environmental requirements and were environmentally acceptable.  The effectiveness and efficiency of the mitigation measures were high as evidenced by a small number of complaints and exceedances.

9.2.       Review of Environmental Monitoring Methodology and EM&A Programme

The environmental monitoring methodologies and procedures were regularly reviewed by the ET.  No modification to the existing monitoring methodology was made during the construction period.  As effective follow up actions were promptly taken once non-compliance were recorded and the monitoring results were in general same as the predictions with mitigation measures in the EIA report after completion of construction works of Junior Police Officers' Married Quarters, the EM&A programme was considered to be successfully conducted during the course of the Construction Phase of the Project.

 

10.  CONCLUSIONS

 

As the construction works of the Project were substantially completed in September 2010 and handover works were completed in November 2010, thus the EM&A programme would be terminated effective from 23rd December 2010.  A certificate of completion from P&T Architects and Engineers Ltd. dated 17 September 2010 was given in Appendix E.

 

Air quality and noise monitoring had been undertaken during the construction period in accordance with the EM&A Manual.  There was one monitoring stations for air quality and noise monitoring.

 

During the course of the project, no exceedances of Action and Limit levels for 1-hour TSP, 24-hour TSP and noise monitoring.

 

There was a successful prosecution to W. Hing Construction Company Limited from EPD dated 9th November 2010 regarding the use of powered mechanical equipment, for the purpose of carrying out construction work other than percussive piling in respect of which a construction noise permit was not in force on 16th May 2010 at Joint-User complex and Wholesale Fish Market in Area 44, Tuen Mun, New Territories. As precautionary measures, the contractor had held a verbal briefing section on 17th May 2010 to all sub-contractors / foremen that no works / operation using powered mechanical equipments are allowed to be carried out during restricted hours between 1900 and 0700 hours and any time on a general holiday, including Sunday. The reason for the non-compliance was anticipated to be lack of supervision of carrying out construction work on Sunday.

 

There was one successful prosecution and no environmental complaint, warning and summons received since commencement of the Project.

 

Mitigation measures had been implemented by the Contractor to minimize the environmental impacts due to construction activities. Site inspections carried out by ET showed that the Contractor rectified the problems observed and no major environmental deficiency was induced. The environmental performance of the Contractor during the construction period was considered satisfactory.

 

The monitoring results and statistics of non-compliance indicated that the EIA process with its recommended mitigation and EM&A programme were effective for protection of the environment and there was no unacceptable environmental impact posed by the Project.