Job No.: TCS001062/19

 

 

 

 

 

 

 

 

 

EP/SP/86/15

Organic Waste Treatment Facilities Phase 2

 

 

 

 

 

 

 

 

 

Baseline Environmental Monitoring and Audit Report – Background Noise

 

 

 

 

 

 

 

 

Prepared For

 

 

 

 

AJA Joint Venture

 

 

 

 

 

 

 

 

 

 

 

Date

Reference No.

Prepared By

Certified By

7 May 2020

TCS001062/19/600/R0012v5

My signature

Martin Li

(Environmental Consultant)

Tam Tak Wing

(Environmental Team Leader)

 

Version

Date

Remarks

1

18 October 2019

First Submission

2

18 November 2019

Amended against IEC comments dated on 14 November 2019

3

19 November 2019

Amended against IEC comments dated on 19 November 2019

4

20 April 2020

Amended against EPD comments

5

7 May 2020

Amended against IEC comments dated on 5 May 2020

 

 

 


 

 

OUT-0245-JV (EMA Rpt Ver5 Verification)

 

 

 

executive summary

ES.01.        Environmental Protection Department (hereafter referred as “EPD”) is the Project Proponent for the Project “Organic Waste Treatment Facilities Phase 2” (hereafter referred as “the Project”).  The Project is a Designated Project to be implemented under Environmental Permit No. EP-460/2013 (hereafter referred as “the EP”). 

 

ES.02.        AJA Joint Venture has been awarded the EPD Contract No. EP/SP/86/15 “Organic Waste Treatment Facilities Phase 2”.  According to the Contract requirement, AJA Joint Venture shall take over all the responsibility of the Environmental Permit No. EP-460/2013 for ease of management, therefore application for Further Environmental Permit was submitted by AJAJV to EPD on 10 September 2019 and Further Environmental Permit No. FEP-01/460/2013 was granted to AJAJV by EPD on 2 October 2019 (hereafter referred as “the FEP”).

 

ES.03.        Action-United Environmental Services & Consulting (hereinafter referred as “AUES”) has been commissioned by AJA Joint Venture as Environmental Team (hereinafter referred as “ET”) to implement Environmental Monitoring & Audit (EM&A) programme in accordance with the approved EM&A Manual as well as the associated duties.

 

ES.04.        According to the EM&A Manual, construction noise was identified as the key environmental issue during the construction phase of the Project and it is required to carry out construction noise monitoring throughout the construction phase. No baseline monitoring for other aspects (e.g. air quality, water quality) is required according to the EM&A Manual. Furthermore, baseline monitoring as part of the EM&A programmes shall be conducted prior to the commencement of the construction works under the Project.  Thus, baseline noise monitoring was conducted by ET from 25 September 2019 to 8 October 2019.  During the baseline monitoring period, no construction activities under the Project or other external influencing factors of significant concern such as construction activities under the other Projects, was observed.

 

ES.05.        The baseline monitoring results form the basis for determining the environmental acceptance criteria for the impact monitoring. After completed the baseline monitoring, all the obtained measurement data will be used as a baseline reference. According to Section 4 of the EM&A Manual, the Action and Limit (A/L) Levels of construction noise monitoring is listed in Table ES-1.

Table ES-1        Action and Limit Levels of Construction Noise Monitoring

Monitoring Location

Action Level

Limit Level

Time Period: 0700-1900 hours on normal weekdays

N1,N2a, N3a, N4

When one or more documented complaints are received

75 dB(A)

Note:

1                If works are to be carried out during restricted hours, the conditions stipulated in the construction noise permit issued by the NCA have to be followed.

2                70dB(A) for schools and 65dB(A) during school examination periods

3                The alternative monitoring location N2a and N3a are proposed for both baseline and impact monitoring

 

ES.06.        In case where exceedance of construction noise action or limit level occurs, actions should be carried out in accordance with the Event and Action Plan stated in the EM&A Manual.

 

 

 


Table of Contents

1     Introduction   1

1.1            Project Background   1

1.2            Report Structure  1

2     Baseline Requirement of Enviornmental Monitoring Programmes  2

2.1            General  2

2.2            Monitoring Parameters  2

2.3            Monitoring Locations  2

2.4            Monitoring Frequency and Period   3

2.5            Monitoring Equipment  3

2.6            Derivation of Action/Limit (A/L) Levels  3

3     Baseline monitoring methdology   5

3.1            Location and Duration and Instrument of Baseline Monitoring   5

3.2            Monitoring Procedures  5

3.3            Data Management  5

4     Baseline Monitoring Results  6

4.1            Results of Background Noise  6

5     Conclusions and Recommendations  11

5.1            Conclusions  11

5.2            Recommendations  11

 

 

List of TABLES

Table 2-1        Distance between the original and alternative station

Table 2-2        Baseline Noise Monitoring Locations

Table 2-3        Construction Noise Monitoring Equipment

Table 2-4        Action and Limit Levels of Construction Noise

Table 4-1        Summaries of Noise Monitoring Results

Table 4-2        Noise Monitoring Results of N2a – Village House No. 318, Sha Ling

Table 4-3        Noise Monitoring Results of N3a – Village House No. 261, Sha Ling

Table 4-4        Noise Monitoring Results of N4 – Village House in Sha Ling as located the Project south-east direction

Table 4-5        Summaries of Noise Monitoring Results

Table 5-1        Action and Limit Levels of Construction Noise Acceptance Criteria Recommend

 

 

List of Appendices

Appendix A    Layout Plan of the Project

Appendix B    Noise Monitoring Locations

Appendix C    Valid Calibration Certificate of Monitoring Equipment

Appendix D    Baseline Monitoring Schedule

Appendix E    Construction Noise Monitoring Results Data

Appendix F     Field Data Sheet

 

 

 

 

 


1                  Introduction

1.1                       Project Background

1.1.1                 Environmental Protection Department (hereafter referred as “EPD”) is the Project Proponent for the Project “Organic Waste Treatment Facilities Phase 2” (hereafter referred as “the Project”).  The Project is a Designated Project to be implemented under Environmental Permit No. EP-460/2013. The layout plan of the Project is shown in Appendix A. 

 

1.1.2                 AJA Joint Venture has been awarded the EPD Contract No. EP/SP/86/15 “Organic Waste Treatment Facilities Phase 2”.  According to the Contract requirement, AJA Joint Venture shall take over all the responsibility of the Environmental Permit No. EP-460/2013 for ease of management, therefore application for Further Environmental Permit was submitted by AJAJV to EPD on 10 September 2019 and Further Environmental Permit No. FEP-01/460/2013 was granted to AJAJV by EPD on 2 October 2019. This baseline report also serves as the relevant EP submission for EP-460/2013.

 

1.1.3                 Major works of construction activities under the Project included:

(i)            Demolition the existing above ground structures of the Sha Ling Livestock Waste Composting Plant (SLCP);

(ii)          Construction superstructure for an administration building and enclosed waste reception area;

(iii)        Installation of treatment facilities including waste pre-treatment equipment, digesters, biogas holding tanks, composting, wastewater treatment, air treatment systems; and

(iv)        Facilities for biogas processing, utilization and transmission;

 

1.1.4                 Action-United Environmental Services & Consulting (hereinafter referred as “AUES”) has been commissioned by AJAJV as an Environmental Team (hereinafter referred as “the ET”) to implement the Environmental Monitoring & Audit (EM&A) programmes in accordance with the approved EM&A Manual as well as the associated duties.   

 

1.1.5                 As part of the EM&A programmes, baseline monitoring is required to be conducted prior to commencement of construction works of the Project.  The Environmental Monitoring requirements are set out in the Approved EM&A Manual, only construction noise was identified as the key issues during the construction phase of the Project.  Thus, baseline noise monitoring conducted by the ET was carried out from 25 September 2019 to 8 October 2019.  During the baseline monitoring period, no construction activities under the Project or other external influencing factors of significant concern such as construction activities under the other Projects was observed.

 

1.1.6                 This Baseline Monitoring Report presents the detailed baseline monitoring information including project background, monitoring methodology and results, and Action/Limit (A/L) Levels as setting in the EM&A Manual for subsequent use in the construction phase of the Project.

 

1.2                       Report Structure

1.2.1                 The Baseline Monitoring Report is structured into the following sections:-

Section 1    Introduction

Section 2    Summaries of Baseline Monitoring Requirement.

Section 3    Baseline Monitoring Methodology

Section 4    Baseline Monitoring Results

Section 5    Conclusions and Recommendations

 

 

 

 


2                  Baseline Requirement of Enviornmental Monitoring Programmes

2.1                       General

2.1.1                 According to the EM&A Manual requirement, only construction noise monitoring is required during the construction phase of the Project.  Other environmental monitoring parameter such as air and water quality is not required during construction period. 

 

2.1.2                 Based on the EM&A Manual requirement, baseline noise monitoring should be conducted prior to the commencement of construction work under the Project.  A summary of the baseline monitoring requirement for construction noise as stipulated in the EM&A Manual is presented below.

 

2.2                       Monitoring Parameters

2.2.1                 The construction noise level should be measured in terms of the A-weighted equivalent continuous sound pressure level (Leq). Leq(30min) should be used as the monitoring parameter between 0700 and 1900 hours during baseline monitoring periods.

 

2.3                       Monitoring Locations

2.3.1                 According to the EM&A Manual Section 4.2.3, there were four (4) noise sensitive receivers (NSR) (i.e. N1, N2, N3 and N4) recommended for construction noise monitoring.

 

2.3.2                 Site visits were conducted by ET to identify the NSR. Since access to the two designated location N2 (Village House No. 319 of Sha Ling) and N3 (Village House No. 265 of Sha Ling) for noise monitoring was not granted by the house owner, two alternative locations N2a (Village House No. 318 of Sha Ling) and N3a (Village House No. 261 of Sha Ling) were proposed to carry out the baseline noise monitoring.

 

2.3.3                 The details of the designated monitoring location N2 & N3 and alternative monitoring location N2a & N3a were summarized in Table 2-1 and showed in Appendix B.

 

Table 2-1  Distance between the original and alternative station

Location ID

Location

Type of premises

Direction from construction site boundary

Slant distance from the construction site boundary

Designated Location N2

Village House No. 319

Residential, Private

 (Village Type Development)

North

92m

Alternative Location N2a

Village House No. 318

Residential, Private

 (Village Type Development)

North

109m

Designated Location N3

Village House No. 265

Residential, Private

 (Village Type Development)

Southwest

55m

Alternative Location N3a

Village House No. 261

Residential, Private

 (Village Type Development)

Southwest

88m

 

2.3.4                 The rationale for choosing the abovementioned alternative monitoring location to carry out noise monitoring are as follows:

Ÿ   Alternative N2a and N3a are noise sensitive receiver as defined in the under Annex 13 of  EIAO-TM (Residential Uses);

Ÿ   Alternative N2a and N3a are located nearby recommend monitoring location N2 and N3 respectively.  In addition, both alternative locations were close to the major site activities and likely impacts by construction noise; and

Ÿ   Alternative monitoring N2a and N3a will have minimal disturbance to the occupants during monitoring.

 

2.3.5                 A proposal of alternative monitoring location with detailed justification was submitted and the proposal was agreed by ER and IEC. The baseline monitoring was carried out at alternative monitoring location N2a and N3a and these alternative locations will serve as temporary locations for impact monitoring until they are agreed by EPD in the future.

 

2.3.6                 The noise monitoring locations for baseline noise monitoring are listed in Table 2-2 and the photo record was shown in Appendix B.

Table 2-2        Baseline Noise Monitoring Locations

Location ID

Location

Remark

N1

Village House No. 308, Sha Ling

The designated monitoring location

N2a

Village House No. 318, Sha Ling

Alternative location of the designated location N2

N3a

Village House No. 261, Sha Ling

Alternative location of the designated location N3

N4

Village House in Sha Ling as located the Project south-east direction

The designated monitoring location

 

2.4                       Monitoring Frequency and Period

2.4.1                 The requirements of baseline noise monitoring are stipulated in Sections 4.2.4 of the approved EM&A Manual and presented as follows.

 

2.4.2                 One set of Leq (30 minutes) noise measurement between 0700 and 1900 hours should be carried out daily for a period of at least two weeks for the baseline noise monitoring as required in EM&A Manual. However, in order to obtain a more comprehensive baseline database, two more noise measurement was added and overall three sets of Leq (30 minutes) noise measurement were conducted daily for more comprehensive baseline database and presented in this report.

 

 

2.5                       Monitoring Equipment

2.5.1                 Sound level meter in compliance with the International Electrotechnical Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications shall be used for carrying out the noise monitoring.  The sound level meter shall be checked using an acoustic calibrator.  The wind speed shall be checked with a portable wind speed meter capable of measuring the wind speed in ms-1.   Noise monitoring equipment used for baseline monitoring is listed in Table 2-2.

Table 2-3         Construction Noise Monitoring Equipment

Equipment

Model

Integrating Sound Level Meter

B&K Type 2238 / Rion NL-52

Calibrator

B&K Type 4231 / Rion NC-75

Portable Wind Speed Indicator

Model 8908 AZ Instrument Wind Speed Indicator

 

2.5.2                 Sound level meters listed above comply with the International Electrotechnical Commission Publications 651: 1979 (Type 1) and 804: 1985 (Type 1) specifications, as recommended in TM issued under the NCO.  The acoustic calibrator and sound level meter used baseline monitoring is to calibrate yearly.

 

2.6                       Derivation of Action/Limit (A/L) Levels

2.6.1                 All the obtained background noise measurement data during baseline monitoring will be used as a reference in case of any Action / Limit levels exceedance was recorded in construction period. The Action and Limit (A/L) Levels of construction noise stated in the EM&A Manual Section 4.2.6 is shown in Table 2-3.

Table 2-4         Action and Limit Levels of Construction Noise

Time Period

Action Level

Limit Level

0700-1900 hours on normal weekdays

When one documented complaint is received

(*)75dB(A)

Note:      (*)     Reduces to 70 dB(A) for schools and 65 dB(A) during the school examination periods.

Remarks:  If works are to be carried out during restricted hours (1900 to 0700 on normal weekdays or at any time on a general holiday including Sunday), the conditions stipulated in the construction noise permit issued by the EPD have to be followed.

 

 

 


3                  Baseline monitoring methdology

3.1                       Location and Duration and Instrument of Baseline Monitoring

3.1.1                 The baseline construction noise monitoring was conducted prior commencement of the Project.  During the baseline monitoring period, no construction activities of this project or the other external influencing factors of significant concern such as construction activities under the other Projects was observed by the ET.

 

3.1.2                 Baseline noise monitoring was conducted at the monitoring location stated in Table 2-1 for two consecutive weeks from 25 September 2019 to 8 October 2019.

 

3.1.3                 All the monitoring equipment stated in Table 2-2 was used for the baseline monitoring. Valid calibration certificates for the sound level meters and calibrators were provided in Appendix C.

 

3.2                       Monitoring Procedures

3.2.1                 The noise measurement was performed with the meter set to FAST response and on the A-weighted equivalent continuous sound pressure level (Leq).  Leq(30mins) in six consecutive Leq(5min) measurement are used as the monitoring parameter throughout the baseline monitoring period.  Restricted hours is 1900 to 0700 on normal weekdays or at any time on a general holiday including Sunday.

 

3.2.2                 During the baseline monitoring, the sound level meter was mounted on a tripod at a height of about 1.2 m and placed at the monitoring locations and oriented such that the microphone was pointed to the site with the microphone facing perpendicular to the line of sight. The windshield was fitted for the measurement.  For the baseline noise monitoring, N1, N2a, N3a, and N4 were conducted in a free-field situation i.e. at least 3.5m distances away from reflective surfaces of the adjacent buildings or walls.

 

3.2.3                 Prior baseline noise measurement, the accuracy of the sound level meter was checked using an acoustic calibrator generating a known sound pressure level at a known frequency.  The calibration from before and after the noise measurement agrees to within 1.0dB such ±0.5dB of the known sound pressure level.

 

3.2.4                 During the noise measurement, a portable wind speed meter was used to check wind speed (m/s).  No noise monitoring was conducted when wind speed was exceeding 5m/s or gusts exceeding 10m/s.  Also, no noise measurement was conducted in the presence of fog and rain.

 

3.3                       Data Management

3.3.1                 The baseline monitoring data were handled by the ET’s in-house data recording and management system.

 

3.3.2                 The monitoring data recorded in the instruments were downloaded directly from sound level meter at the end of each monitoring day.  The downloaded monitoring data were input into a computerized database properly maintained by the ET. 

 


4                  Baseline Monitoring Results

4.1                       Results of Background Noise

4.1.1                 The baseline monitoring schedule is enclosed in Appendix D.  During the baseline monitoring period, no construction activities under the Project or other external influencing factors of significant concern such as construction activities under the other Projects was observed.

 

4.1.2                 The baseline noise monitoring was undertaken at N1, N2a, N3a and N4 from 25 September 2019 to 8 October 2019. In order to obtain a more comprehensive baseline database, three sets of Leq (30 minutes) noise measurement were conducted daily. All the three noise measurement was carried out randomly throughout 0700 – 1900 of the monitoring day and no specified measurement period was selected. During the noise measurement, no noise measurement was carried out under rain and in the presence of fog. Furthermore, a portable wind speed meter was used to check wind speed to ensure no wind speed was exceeding 5m/sec or gusts exceeding 10m/sec.  The detailed measurement data and field data sheet are shown in Appendix E and in Appendix F respectively. Each monitoring station background noise summary is listed in Table 4-5.

Table 4-1         Noise Monitoring Results of N1 – Village House No. 308, Sha Ling

Date

Start Time

End Time

L10 Range

Leq5min, dB(A)

L90 Range

Leq5min, dB(A)

Leq30min, dB(A)

Corrected Leq30min, dB(A)

25-Sep-19

10:16

10:46

43.5-46.5

36.7-37.8

43.3

46.3

14:08

14:38

44.5-48.1

37.2-38.8

42.9

45.9

17:30

18:00

41.9-49.6

34.3-35.9

42.3

45.3

26-Sep-19

10:38

11:08

43.0 -45.2

37.0-38.3

57.1

60.1

14:01

14:31

43.8-57.6

37.2-38.9

59.0

62.0

17:16

17:46

40.8-43.2

35.1-37.2

42.4

45.4

27-Sep-19

10:36

11:06

47.5-50.0

40.3-41.6

60.5

63.5

13:03

13:33

42.4-48.7

38.1-40.1

57.1

60.1

16:14

16:44

43.4-49.3

37.6-38.9

60.9

63.9

28-Sep-19

10:31

11:01

45.0-65.8

39.2-41.6

63.5

66.5

13:16

13:46

45.2-47.0

37.3-39.3

59.6

62.6

16:24

16:54

46.7-50.8

32.2-34.8

63.1

66.1

29-Sep-19#

10:43

11:13

45.2-66.1

36.4-41.3

62.4

65.4

12:43

13:13

43.0-46.5

36.1-37.9

61.2

64.2

15:50

16:20

45.1-48.5

38.0-40.2

59.3

62.3

30-Sep-19

10:15

10:45

44.0-50.4

38.1-40.9

62.9

65.9

13:10

13:40

46.2-78.2

40.4-42.5

68.0

71.0*

16:16

16:46

46.8-48.8

38.1-39.5

63.6

66.6

1-Oct-19#

10:38

11:08

46.3-48.6

36.6-41.6

62.3

65.3

12:32

13:02

43.4-48.1

37.2-39.2

64.1

67.1

15:37

16:07

43.5-45.1

36.1-37.2

53.2

56.2

2-Oct-19

10:47

11:17

44.8-47.4

39.2-40.7

59.4

62.4

13:21

13:51

44.2-50.7

34.8-42.9

48.9

51.9

16:31

17:01

45.4-47.3

36.9-41.5

63.6

66.6

3-Oct-19

10:37

11:07

45.3-48.1

39.5-42.8

65.1

68.1

13:12

13:42

44.2-48.6

39.5-42.3

61.5

64.5

16:19

16:49

44.3-47.4

36.6-39.4

61.5

64.5

4-Oct-19

10:28

10:58

44.1-46.5

39.1-41.1

47.0

50.0

12:52

13:22

43.1-56.4

36.0-42.8

48.0

51.0

16:03

16:33

44.0-47.6

39.0-40.5

62.0

65.0

5-Oct-19

10:45

11:15

50.5-54.5

36.7-40.8

52.6

55.6

13:26

13:56

42.4-46.0

37.5-39.8

60.2

63.2

16:33

17:03

46.5-49.9

39.2-41.5

50.6

53.6

6-Oct-19#

10:36

11:06

46.1-48.4

36.5-37.7

59.6

62.6

12:31

13:01

43.3-45.2

37.1-38.6

61.0

64.0

15:37

16:07

43.0-45.9

37.2-38.8

60.8

63.8

7-Oct-19#

10:19

10:49

46.0-58.5

39.5-45.5

51.2

54.2

15:41

16:11

40.0-66.0

35.0-37.0

55.0

58.0

16:13

16:43

41.0-69.5

36.5-39.5

58.2

61.2

8-Oct-19

10:41

11:11

45.6-48.8

38.5-41.6

60.5

63.5

13:23

13:53

44.8-50.0

40.2-42.4

51.3

54.3

16:35

17:05

44.6-47.7

38.1-39.5

50.6

53.6

Note:      Sound level meter set at monitoring stations is made free-field measurement, façade correction (+3dB(A)) has added according to acoustical principles and EPD guidelines

*High noise level recorded due to dog barking

#Sunday or Public Holiday

 

Table 4-2         Noise Monitoring Results of N2a – Village House No. 318, Sha Ling

Date

Start Time

End Time

L10 Range

Leq5min, dB(A)

L90 Range

Leq5min, dB(A)

Leq30min, dB(A)

Corrected Leq30min, dB(A)

25-Sep-19

10:58

11:28

45.1-83.3

39.5-42.2

70.6

73.6*

14:48

15:18

43.3-44.9

37.1-38.3

59.1

62.1

16:52

17:22

43.0-45.7

36.6-38.0

57.3

60.3

26-Sep-19

10:02

10:32

42.5-45.7

36.2-37.5

42.7

45.7

14:37

15:07

40.7-50.1

34.4-35.9

51.9

54.9

16:40

17:10

41.2-43.4

35.1-36.3

40.7

43.7

27-Sep-19

9:55

10:25

42.1-43.6

35.1-36.8

41.3

44.3

13:43

14:13

47.0-55.5

35.5-40.8

51.5

54.5

15:38

16:08

46.0-50.5

34.1-35.2

41.2

44.2

28-Sep-19

9:54

10:24

41.1-43.7

35.6-38.2

42.6

45.6

13:52

14:22

41.2-44.2

35.4-37.9

41.9

44.9

15:47

16:17

40.1-46.0

34.6-35.8

50.2

53.2

29-Sep-19#

10:04

10:34

48.0-59.2

40.2-42.4

50.1

53.1

13:19

13:49

46.6-53.8

34.0-36.5

52.7

55.7

15:14

15:44

42.8-43.9

35.4-36.5

49.5

52.5

30-Sep-19

9:39

10:09

41.9-45.8

35.4-37.2

41.9

44.9

13:46

14:16

42.1-45.6

36.0-37.5

45.8

48.8

15:40

16:10

46.2-48.7

35.0-36.7

47.5

50.5

1-Oct-19#

10:02

10:32

42.5-46.8

35.1-37.6

45.5

48.5

13:07

13:37

46.6-49.9

34.1-36.9

45.9

48.9

15:02

15:32

49.6-52.2

35.5-36.5

48.8

51.8

2-Oct-19

10:09

10:39

50.0-54.5

38.4-42.9

52.8

55.8

14:00

14:30

62.6-63.1

61.8-62.8

63.3

66.3

15:55

16:25

44.5-50.2

36.0-38.7

47.8

50.8

3-Oct-19

10:01

10:31

48.3-51.2

38.4-41.2

44.4

47.4

13:50

14:20

46.3-55.5

35.5-37.6

51.7

54.7

15:43

16:13

44.3-50.5

38.2-42.5

54.8

57.8

4-Oct-19

9:50

10:20

42.8-47.1

36.3-38.2

43.1

46.1

13:20

13:50

42.2-45.3

36.1-37.3

41.2

44.2

15:26

15:56

41.0-43.6

35.0-36.5

42.0

45.0

5-Oct-19

10:08

10:38

45.2-48.6

35.2-38.3

46.3

49.3

14:02

14:32

41.0-43.5

35.3-36.6

42.1

45.1

15:57

16:27

42.6-45.3

36.1-37.2

59.1

62.1

6-Oct-19#

9:59

10:29

46.8-50.5

40.3-42.4

45.4

48.4

13:07

13:37

42.0-44.6

34.0-35.6

43.1

46.1

15:32

16:02

42.2-44.3

34.6-36.4

42.3

45.3

7-Oct-19#

9:42

10:12

43.5-65.0

38.0-41.5

54.0

57.0

14:30

15:00

43.5-65.5

38.5-41.5

54.0

57.0

15:01

15:31

44.5-68.5

38.0-41.0

53.4

56.4

8-Oct-19

10:03

10:33

40.4-48.3

34.2-35.6

46.6

49.6

14:04

14:34

42.5-46.0

36.0-38.7

43.1

46.1

15:59

16:29

40.7-55.5

34.1-37.1

45.1

48.1

Note:      Sound level meter set at monitoring stations is made free-field measurement, façade correction (+3dB(A)) has added according to acoustical principles and EPD guidelines

*High noise level recorded due to dog barking

#Sunday or Public Holiday

 

Table 4-3         Noise Monitoring Results of N3a – Village House No. 261, Sha Ling

Date

Start Time

End Time

L10 Range

Leq5min, dB(A)

L90 Range

Leq5min, dB(A)

Leq30min, dB(A)

Corrected Leq30min, dB(A)

25-Sep-19

9:32

10:02

39.0-64.0

33.7-35.8

65.2

68.2

13:24

13:54

40.8-52.2

36.2-38.4

64.4

67.4

18:13

18:43

46.7-61.2

32.7-34.8

66.5

69.5

26-Sep-19

11:20

11:50

49.4-52.8

38.1-39.5

59.7

62.7

13:17

13:47

51.1-54.5

38.1-40.0

49.5

52.5

17:57

18:26

43.5-60.5

32.8-35.2

65.2

68.2

27-Sep-19

11:19

11:49

53.0-59.2

37.3-41.3

64.6

67.6

11:50

12:20

51.4-65.9

35.9-38.8

61.8

64.8

16:57

17:27

46.4-55.8

32.8-34.9

62.6

65.6

28-Sep-19

11:12

11:42

50.5-54.4

37.0-38.2

61.2

64.2

11:44

12:14

51.6-61.6

37.2-38.9

65.1

68.1

17:07

17:37

40.8-43.6

32.1-35.1

41.8

44.8

29-Sep-19#

11:27

11:57

48.2-52.1

30.8-32.4

59.0

62.0

11:59

12:29

44.5-51.9

29.1-31.3

62.1

65.1

16:31

17:01

44.8-46.5

29.0-30.6

42.9

45.9

30-Sep-19

10:59

11:29

51.3-62.5

38.0-40.5

60.9

63.9

11:31

12:01

51.5-69.9

38.0-39.6

65.6

68.6

16:57

17:27

46.5-59.6

32.0-34.5

65.8

68.8

1-Oct-19#

11:19

11:49

48.6-51.2

30.6-34.8

57.9

60.9

11:50

12:20

43.5-48.0

29.3-34.6

42.8

45.8

16:18

16:48

45.0-50.0

29.6-31.3

63.5

66.5

2-Oct-19

11:30

12:00

47.9-52.8

34.0-37.8

47.5

50.5

12:02

12:32

44.4-51.8

34.8-39.2

46.5

49.5

17:12

17:42

46.5-49.5

32.3-34.6

60.1

63.1

3-Oct-19

11:21

11:51

44.2-53.2

37.1-40.0

58.7

61.7

11:53

12:23

46.6-49.4

36.1-38.6

63.0

66.0

17:01

17:31

44.7-51.5

32.2-34.3

46.4

49.4

4-Oct-19

11:11

11:41

53.0-80.9

32.6-75.2

76.8

79.8*

11:41

12:11

52.0-80.6

43.4-75.3

75.4

78.4*

16:44

17:14

46.4-60.8

32.0-34.0

66.6

69.6

5-Oct-19

11:27

11:57

47.2-52.2

34.2-36.6

62.6

65.6

11:58

12:28

44.9-50.6

34.5-35.6

46.6

49.6

17:14

17:44

49.2-62.4

31.1-34.5

62.1

65.1

6-Oct-19#

11:19

11:49

44.0-70.6

32.0-35.1

64.1

67.1

11:50

12:20

44.3-52.1

30.5-32.3

57.6

60.6

16:18

16:48

46.3-51.5

30.0-32.0

59.4

62.4

7-Oct-19#

11:10

11:40

43.0-66.5

40.0-42.5

56.6

59.6

16:51

17:21

41.5-67.5

38.0-39.5

55.9

58.9

17:24

17:54

42.0-63.5

37.0-38.5

51.9

54.9

8-Oct-19

11:22

11:52

45.8-52.2

36.0-37.9

64.7

67.7

11:54

12:24

47.3-52.4

36.2-37.6

47.7

50.7

17:18

17:48

51.2-61.4

35.9-37.7

72.4

75.4*

Note:      Sound level meter set at monitoring stations is made free-field measurement, façade correction (+3dB(A)) has added according to acoustical principles and EPD guidelines

*High noise level recorded due to dog barking

#Sunday or Public Holiday

 

 

Table 4-4         Noise Monitoring Results of N4 – Village House in Sha Ling as located the Project south-east direction

Date

Start Time

End Time

L10 Range

Leq5min, dB(A)

L90 Range

Leq5min, dB(A)

Leq30min, dB(A)

Corrected Leq30min, dB(A)

25-Sep-19

11:46

12:16

49.0-86.8

32.9-36.7

73.4

76.4*

15:32

16:02

51.6-55.8

38.2-38.7

66.1

69.1

16:07

16:37

49.7-61.0

38.5-39.1

63.8

66.8

26-Sep-19

9:22

9:52

51.6-54.8

37.5-38.5

58.2

61.2

15:18

15:48

43.9-56.6

32.6-34.4

54.9

57.9

15:50

16:20

42.7-48.5

33.6-35.5

55.3

58.3

27-Sep-19

9:08

9:38

40.5-46.7

33.5-36.4

57.2

60.2

14:25

14:55

39.1-43.3

32.6-36.6

40.7

43.7

14:56

15:26

41.8-45.2

33.5-36.0

44.7

47.7

28-Sep-19

9:12

9:42

40.9-45.2

33.0-36.3

59.0

62.0

14:33

15:03

41.0-42.5

33.4-34.5

42.1

45.1

15:05

15:35

42.0-45.4

33.6-34.6

41.6

44.6

29-Sep-19#

9:17

9:47

36.6-57.9

31.1-31.1

57.8

60.8

14:00

14:30

42.0-48.2

33.3-33.3

63.7

66.7

14:31

15:01

34.2-45.2

33.2-33.2

57.9

60.9

30-Sep-19

9:09

9:39

42.0-44.2

33.5-33.5

41.9

44.9

14:28

14:58

41.0-44.2

34.0-34.0

61.5

64.5

14:59

15:29

43.3-46.3

33.5-33.5

58.5

61.5

1-Oct-19#

9:20

9:50

36.4-58.2

31.0-31.0

62.4

65.4

13:49

14:19

41.0-46.5

32.6-32.6

65.8

68.8

14:20

14:50

36.7-52.8

32.1-32.1

59.0

62.0

2-Oct-19

9:24

9:54

43.5-46.7

33.1-33.1

58.8

61.8

14:42

15:12

41.4-50.5

34.0-34.0

63.3

66.3

15:13

15:43

40.2-50.5

33.2-33.2

62.0

65.0

3-Oct-19

9:18

9:48

44.5-47.6

33.3-33.3

62.5

65.5

14:31

15:01

43.2-52.9

32.0-32.0

59.4

62.4

15:02

15:32

42.6-46.5

32.4-32.4

66.1

69.1

4-Oct-19

9:07

9:37

41.9-61.5

34.3-34.3

65.4

68.4

14:12

14:42

41.7-57.1

34.5-34.5

62.0

65.0

14:44

15:14

41.2-44.2

34.4-34.4

57.6

60.6

5-Oct-19

9:25

9:55

40.5-46.1

34.4-34.4

61.2

64.2

14:43

15:13

49.0-54.3

37.0-37.0

68.0

71.0

15:14

15:44

48.4-56.5

37.2-37.2

63.2

66.2

6-Oct-19#

9:15

9:45

40.3-47.0

33.5-33.5

62.6

65.6

13:49

14:19

36.5-40.6

31.0-31.0

66.7

69.7

14:21

14:51

36.0-38.1

32.2-32.2

60.6

63.6

7-Oct-19#

9:07

9:37

50.5-70.5

36.5-36.5

61.4