Issue No.        :           1

             Issue Date       :           October 2008

             Project No.     :           768

 

 

 

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

 

 

Environmental Monitoring & Audit Report

(September 2008)

 

 

 

Prepared By:

 

Allied Environmental Consultants Ltd.

 

 

 

 

COMMERCIAL-IN-CONFIDENCE

 

 

 

 


Issue No.         :           1

            Issue Date        :           August 2008

            Project No.      :           768

 

 

 

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

 

 

Environmental Monitoring & Audit Report (August 2008)

 

 

 

Prepared By:

 

Allied Environmental Consultants Ltd.

 

 

 

COMMERCIAL-IN-CONFIDENCE

 

 

 

                Author:                                                                   

                                                Quincy Leung

                                                BSc(Hons) Msc

 

 

 

Checked:                                                                                Approved:                                                            

Claudine Lee                                                                      Grace Kwok

MSc MHKIEIA MHKIOA                                                     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                                                                                                                                                      3

1.    PROJECT BACKGROUND                                                                                                                                        2

1.1      Project Organization and Contact Personnel                                                                                                    2

2.    SENSITIVE RECEIVERS                                                                                                                                             3

3.    CONSTRUCTION WORKS & PROGRAMME                                                                                                      3

4.    SUMMARY OF EM&A REQUIREMENT                                                                                                                  3

5.    MONITORING METHODOLOGY                                                                                                                            5

5.1      Monitoring Programme                                                                                                                                        5

5.2      Air Quality Monitoring                                                                                                                                        5

5.3      Noise Monitoring                                                                                                                                                  6

6.    RESULTS                                                                                                                                                                       6

6.1.      Air Quality                                                                                                                                                              6

6.2.      Noise                                                                                                                                                                       7

6.3.      Weather Conditions                                                                                                                                             7

7.    SITE INSPECTION & AUDIT                                                                                                                                    8

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

9.    OTHERS                                                                                                                                                                         9

10.      CONCLUSIONS                                                                                                                                                       9


 

List of Tables

 

Table 1             Contact Details of Key Personnel

Table 2             Interrelationship between Construction Activities and Mitigation Measures

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             1-hour TSP Monitoring Results

Table 8             24-hour TSP Monitoring Results

Table 9             Noise Monitoring Results

Table 10           Summary of Weather Conditions during the Monitoring Period

Table 11           Summary of Site Inspections

 

List of Figures

 

Figure 1            Site Location Plan

Figure 2            Location of Air Quality Monitoring Station

Figure 3            Location of Noise Monitoring Station

Figure 4            Photos of Air Quality Monitoring Station

Figure 5            Photos of Noise Monitoring Station

Figure 6            Photos of the Construction Site for the Junior Police Officers’ Married Quarters

 

 

 

 

List of Appendices

 

Appendix A      Calibration Record of High-Volume TSP Sampler

Appendix B      Calibration Certification of the Sound Level Meter and Calibrator

Appendix C      Summary of 1-Hour TSP Monitoring Record

Appendix D      Summary of 24-Hour TSP Monitoring Record

Appendix E      Summary of Noise Monitoring Record

Appendix F      Wind Record from Hong Kong Observatory

Appendix G      Mitigation Measures Implementation Schedule for Construction Stage

 

 

 

 

 

 

 

 

 


EXECUTIVE SUMMARY

 

Allied Environmental Consultants Limited (AEC) has been appointed to conduct an environmental monitoring and audit (EM&A) program for the proposed Joint User Complex and Wholesale Fish Market at Area 44, Tuen Mun. The construction works was commenced on 31st July 2008. This report is the second monthly EM&A report, which details the environmental monitoring and audit results recorded during the period from 1st September 2008 to 30th September 2008.

 

Impact environmental monitoring for the proposed Joint User Complex and Wholesale Fish Market at Area 44, Tuen Mun has been carried out on 5th, 11th, 17th, 23rd and 29th September 2008 at Block 15, Yuet Wu Villa. Baseline 1-hr TSP and noise monitoring were conducted within the period of 0700-1900 hours, where baseline 24-hr TSP monitoring was conducted continuously for a 24-hour period.

 

1-hour TSP monitoring results at the monitoring location ranged from 116μg/m3 to 217μg/m3 with an average of 156μg/m3. 24-hour TSP monitoring results ranged from 55μg/m3 to 91μg/m3 with an average of 78μg/m3.

 

Noise monitoring results at the monitoring location ranged from 61.8dB(A) to 63.0dB(A) with an average of 62.5dB(A). 

 

Based on the monitoring results, the air quality and construction noise level shall comply with the environmental requirements in EM&A Manual. There were no breaches of the action and limit levels. There were no environmental complaints received in the reporting month.  No notification of summons or prosecution was received.

 

Construction activities to be undertaken in October 2008 include the continuation of jack piling, drainage diversion, and superstructure works. Potential environmental impacts include dust generation from stockpiles of dusty materials, the drainage diversion work, and pre-boring; noise from operation of the equipments and jack piling; runoff from drainage diversion works, and pre-boring; and the storage of various C&D and chemical wastes. The Contractor should properly implement the required environmental mitigation measures as per the implementation schedule in the EM&A manual to ensure no significant adverse environmental impacts to be arisen from the construction works. The Contractor was reminded to maintain good housekeeping throughout the construction phase.


 

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, Home Affairs 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, a dragon boat racing spectator stand, and other community facilities for public use. The proposed development is a 3-storey complex to accommodate a wholesale fish market, a public toilet, a refuse collection point and a marine refuse collection point at the ground floor, a community hall on the first floor, and a dragon boat race spectator stand with 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 7140

2314 2866

 

Environmental Permit Holder

Architecture Services Department

Mr. S.W. Chow

Ms. Susana Chan

2867 3716

2867 6706

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. Tim Wong

9630 7404

6478 4623

8343-9188

Environmental Team Leader

Allied Environmental Consultants Ltd.

Ms. Grace Kwok

2815 7028

2815 5399

Independent Environmental Checker

Cinotech Consultants Ltd.

Mr. Alex Ngai

2151 2083

3107 1388

 

 

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, 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.        CONSTRUCTION WORKS & PROGRAMME

 

The major works undertaken and/or completed during the monitoring period are listed below:

 

-         Pre-boring works

-         Jack piling works

-         Drainage diversion works

 

Table 2 shows the interrelationship between construction activities and environmental mitigation measures for the reporting month.

 

 

Table 2            Interrelationship between Construction Activities and Mitigation Measures

 

         Construction Works        

Major Environmental Impact

Mitigation Measures

Pre-boring

Noise, air quality, and water quality impacts

Water spraying, avoided rainy days, wastewater treated before discharging

Jack piling

Noise impact

Well-maintained plants were used

Drainage diversion

Air quality, and water quality impacts

Water spraying, avoided rainy days

 

 

4.       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-hr TSP monitoring.  For 1-hr 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-hr TSP value of 129μg/m3 and 24-hr 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 in accordance with the proposed Event Action Plan given in the 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

 

 

5.       MONITORING METHODOLOGY

5.1       Monitoring Programme

 

Air quality monitoring and noise monitoring were conducted at Block 15, Yuet Wu Villa on 5th, 11th, 17th, 23rd and 29th September 2008. 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 at the junction of Wu Sau Street and Wu On Street as given in Figure 2 and 3.  Figure 4 and 5 show photos taken during monitoring at the two locations.

 

A construction site for the proposed Junior Police Officers' Married Quarters is located at 110m away from the monitoring location, which can be a major source of the noise and TSP generation during the monitoring period. Figure 6 shows the photos of the construction site.

 

 

5.2       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. The Calibration Record of the High-Volume TSP Sampler is given in Appendix A. 24-hour TSP samples were taken every six days. 1-hour TSP samples were taken three times a day between 0700-1900 hours.

 

5.3       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 and the Calibration Certificate for the sound level meter and calibrator is given in Appendix B.

 

Table 6            Noise Monitoring Equipment

 

Manufacturer

Type/Model No.

Equipment

RION

Model NL 31

Precision Sound Level Analyser 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 daily 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.

 

6.       RESULTS

6.1.       Air Quality

 

1-hour and 24-hour TSP monitoring results are summarized in Table 7 and 8 and serve as the basis for determining the action and limit levels. The minimum and maximum 1-hour TSP measured at Yuet Wu Villa was 116μg/m3 and 217μg/m3 respectively with an average of 156μg/m3. The minimum and maximum 24-hour TSP measured was 55μg/m3 and 91μg/m3 respectively with an average of 78μg/m3. Summary of air quality monitoring record will be provided in Appendix C and D.

 

 

Table 7            1-Hour TSP Monitoring Results

 

Day

Date

1-hr TSP (μg/m3)

Average

(μg/m3)

Reading 1

Reading 2

Reading 3

Average

1

5 Sept 2008

152

177

136

155

156

2

11 Sept 2008

133

181

136

150

3

17 Sept 2008

213

116

217

182

4

23 Sept 2008

129

132

142

134

5

29 Sept 2008

174

146

159

160

 

Table 8            24-Hour TSP Monitoring Results

 

Day

Date

24-hr TSP (μg/m3)

1

5 Sept 2008

82

2

11 Sept 2008

55

3

17 Sept 2008

91

4

23 Sept 2008

73

5

29 Sept 2008

90

 

Average

78

 

6.2.       Noise

 

Noise monitoring results in terms of Leq(30min), L10(30min) L90(30min) measured at the designated noise monitoring location are summarized in Table 9. 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.

 

During the reporting month, the minimum and maximum noise level measured at Yuet Wu Villa was 61.8dB(A) Leq(30min) and 63.0dB(A) Leq(30min) respectively with an average of 62.5dB(A) Leq(30min). No exceedance was recorded in this reporting period. Summary of noise monitoring record will be provided in Appendix E.

 

Table 9            Noise Monitoring Results

 

Day

Date

L10(30mins)  (dB(A))

L90(30mins) (dB(A))

Leq(30mins) (dB(A))

1

5 Sept 2008

63.6

56.6

62.4

2

11 Sept 2008

63.3

56.5

61.8

3

17 Sept 2008

64.2

57.0

62.8

4

23 Sept 2008

64.3

56.2

63.0

5

29 Sept 2008

65.6

58.8

62.5

 

Average

64.2

56.6

62.5

 

 

6.3.       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 10 summarizes the wind data during the monitoring dates. Wind record from HKO will be shown in Appendix F.

 

Table 10       Summary of Weather Conditions during the Monitoring Period

 

Date

Weather

Prevailing Wind direction

Daily Average Wind speed (m/s)

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

 

7.       SITE INSPECTION & AUDIT

 

5 site inspections were conducted by the Environmental Team (ET) in this reported period. Major observations by the ET, actions by the Contractor and outcome are summarized in the Table 11.

 

Table 11          Summary of Site Inspections

 

 

Date

Observations

Action taken by Contractor

Outcome

1

5/9/2008

Stagnant water observed on site.

Stagnant water is cleaned up immediately.

The situation is rectified immediately.

2

12/9/2008

Rubbish found on site.

Rubbish was cleared immediately.

The situation is rectified immediately.

3

17/9/2008

Two oil drums were placed on bare land.

 

Rubbish found on site

Drip tray is placed immediately.

 

Rubbish was cleared immediately.

The situation is rectified immediately.

4

23/9/2008

Most fuel drums were placed on bare land.

 

Exposed surface was not properly covered by tarpaulin sheet.

Drip tray is placed immediately.

 

Exposed surface is covered immediately.

The situation is rectified immediately.

5

30/9/2008

An oil drum was placed on bare land.

 

Exposed surface was not properly covered by tarpaulin sheet.

Drip tray is placed immediately.

 

Exposed surface is covered immediately.

The situation is rectified immediately.

 

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

 

In this reporting period, no complaint, inspection notice, notification of summons or prosecution was received.  No non-compliance was recorded.

 

 

9.       OTHERS

614.09m3 of inert C&D waste was disposed at public fill. 0 tonnes of waste was disposed to landfill. No chemical waste was transported off site in this reported period.

 

 

10.  CONCLUSIONS

 

Environmental monitoring has been carried out for the proposed Joint User Complex and Wholesale Fish Market at Area 44, Tuen Mun. 1-hour and 24-hour TSP air quality monitoring and noise monitoring was conducted at Block 15, Yuet Wu Villa during the period from 1st September 2008 to 31st September 2008.

 

The average 1-hour TSP level is 156μg/m3 and average 24-hour TSP level is 78μg/m3. For impact noise monitoring, the 30-minute average noise level is 62.5dB(A) .