7            Construction Dust Impact Assessment

7.1            Introduction

This chapter presents the findings of the assessment of construction dust implications arising from the SCL (TAW-HUH) during the construction phase. All above-ground works areas with potential dust emission activities have been examined. With the implementation of on-site watering, potential environmental impacts associated with construction dust would be controlled to acceptable levels.

For the criteria as regards air quality impact assessment, reference shall be made to the Hong Kong Planning Standards and Guidelines (HKPSG), the Air Pollution Control Ordinance (APCO) (Cap.311), and Annex 4 of the Technical Memorandum on Environmental Impact Assessment Process (TM-EIAO).

The APCO (Cap.311) provides the power for controlling air pollutants from a variety of stationary and mobile sources and encompasses a number of Air Quality Objectives (AQOs). In addition to the APCO, the following overall policy objectives are laid down in Chapter 9 of the Hong Kong Planning Standards and Guidelines (HKPSG) as follows:

a)   Limit the contamination of the air in Hong Kong, through land use planning and through the enforcement of the APCO, to safeguard the health and well-being of the community; and

b)   Ensure that the AQO for 7 common air pollutants are met as soon as possible.

Currently, the AQOs stipulate limits on concentrations for 7 pollutants including sulphur dioxide (SO2), Total Suspended Particulates (TSP), Respirable Suspended Particulates (RSP), Nitrogen Dioxide (NO2), Carbon Monoxide (CO), photochemical oxidants, and Lead (Pb).  The AQOs are listed in the table below.

Table 7.1:       Hong Kong Air Quality Objectives (HKAQO)

 

Limits on Concentration, ug/m3 [1]

(ppm in brackets)

Pollutant

1-hr [2]

8-hr [3]

24-hr [3]

3-Month [4]

Annual [4]

Sulphur Dioxide

800

(0.3)

 

350

(0.13)

 

80

(0.03)

Total Suspended Particulates

500 [7]

 

260

 

80

Respirable Suspended Particulates [5]

 

 

180

 

55

Carbon Monoxide

30,000

(26.2)

10,000

(8.7)

 

 

 

Nitrogen Dioxide

300

(0.16)

 

150

(0.08)

 

80

(0.04)

Photochemical Oxidants (as ozone) [6]

240

 

 

 

 

Lead

 

 

 

1.5

 

Notes:

[1]   Measured at 298K and 101.325 kPa.

[2]   Not to be exceeded more than three times per year.

[3]   Not to be exceeded more than once per year.

[4]   Arithmetic mean.

[5]   Respirable suspended particulates means suspended particulates in air with a nominal aerodynamic diameter of 10 micrometres or smaller.

[6]   Photochemical oxidants are determined by measurement of ozone only.

[7]   Not an AQO but is a criterion for evaluating air quality impacts as stated in Annex 4 of TM-EIAO.

The key air emission source from SCL (TAW-HUH) is the dust generated during construction phase at above-ground works areas.  In this regard, air pollutant of concern would only include total suspended particulates (TSP) which has been assessed in this study.  The dust emissions generated during grouting, bored tunnelling and drill-and-blast activities would be insignificant.

Existing Air Sensitive Receivers (ASRs) in the vicinity of the project include various residential developments, educational institution etc (see Section 7.4).  Key existing air pollution sources that may bear upon the air quality along SCL alignment at construction phase including work sites demarcated for construction and railway works, barging facilities and haul roads located nearby.  Details of air pollution emission sources are discussed in Section 7.6.

Historical air quality monitoring data from the monitoring stations, namely the Tsuen Wan, Kwai Chung, Sham Shui Po, Kwun Tong, Central/Western and Sha Tin Monitoring stations operated by EPD, have been examined.  The latest air quality monitoring data from 2006 to 2010 at these monitoring stations are tabulated in the table below. In order to determine the meaningful background air quality, the latest 5-year annual average would be adopted.

 

Table 7.2:       TSP Monitoring Data in 2006-2010

Monitoring Station

Annual TSP Concentration (ug/m3)

2006

2007

2008

2009

2010

5-year

Average

Tai Wai Area

Sha Tin

61

73

66

60

67

65.4

(82%)

Kowloon Area

Tsuen Wan

82

79

67

63

63

70.8

(89%)

Kwai Chung

81

85

79

70

71

77.2

(96%)

Sham Shui Po

79

79

81

77

76

78.4

(97%)

Kwun Tong

75

82

72

70

67

73.2

(92%)

Central/ Western

78

77

78

73

76

76.4

(96%)

 

 

 

 

 

Average:

75.2

(94%)

Note:

% of AQO is provided in the bracket.

Monitoring results exceeded AQO are shown as bolded characters.

According to latest available monitoring data from the Shatin Monitoring Station, the 5-year annual average is 65.4ug/m3. For the Kowloon Area, the existing environment of the study area is mainly a densely populated and developed area with a mix of residential, commercial and institutional development. Given the developed nature of the study area and the similarity with the area surrounding EPD’s monitoring stations in urban area, including Tsuen Wan, Kwai Chung, Sham Shui Po, Kwun Tong, and Central/Western Monitoring Stations, it is considered reasonable to adopt all the monitoring data from these stations to represent background conditions in the Kowloon Area. As such the background TSP concentration of 75.2ug/m3 is therefore adopted.

Construction of the project will involve the emission of fugitive dusts and hence TSP has to be assessed for construction phase air quality impact. During the operational phase, only electrified trains would be operated and hence there will not be air quality emission.

7.4.1       Air Sensitive Receivers

With reference to EIA Study Brief No. ESB-191/2008 for SCL (TAW-HUH), the study area for air quality impact assessment should generally be defined by a distance of 500m from the proposed alignment.  Further, it should be extended to include major emission sources that may have a bearing on the environmental acceptability of the project.  The study will also review the air quality impacts on the areas and other sensitive receivers beyond 500m from the alignment, which may be potentially affected by the Project.

In accordance with Annex 12 of the TM-EIAO, Air Sensitive Receivers (ASRs) include domestic premises, hotel, hostel, hospital, clinic, nursery, temporary housing accommodation, school, educational institution, office, factory, shop, shopping centre, place of public worship, library, court of law, sports stadium or performing arts centre.  Any other premises or places with which, in terms of duration or number of people affected, has a similar sensitivity to the air pollutants as the aforelisted premises and places would also be considered as a sensitive receiver. Representative ASRs within a distance of 500m from the alignment, temporary work areas, and associated barging facilities have been identified.

These ASRs include both the existing and planned developments.  Existing ASRs are identified by means of reviewing topographic maps, aerial photos, land status plans, supplemented by site inspections. They mainly include developed residential buildings with different storey high, educational institution of few storey high and hotels etc.

Planned/committed ASRs are identified by making reference to relevant Outline Zoning Plans (OZP), Outline Development Plans, Layout Plans and other published plans in the vicinity of the alignment, including:

·       Draft Sha Tin Outline Zoning Plan (No. S/ST/25);

·       Approved Tsim Sha Tsui (KPA 1) Outline Zoning Plan (No. S/K1/26);

·       Draft Yau Ma Tei (KPA 2) Outline Zoning Plan (No. S/K2/21);

·       Draft Ho Man Tin (KPA 6&7) Outline Zoning Plan (No. S/K7/21);

·       Approved Wang Tau Hom & Tung Tau (KPA 8) Outline Zoning Plan (No. S/K8/21)

·       Approved Hung Hom (KPA 9) Outline Zoning Plan (No. S/K9/24);

·       Approved Ma Tau Kok (KPA 10) Outline Zoning Plan (No. S/K10/20);

·       Approved Tsz Wan Shan, Diamond Hill & San Po Kong (KPA 11) Outline Zoning Plan (No. S/K11/25);

·       Draft Kai Tak (KPA22) Outline Zoning Plan (No. S/K22/3)

The relevant stakeholders were also approached to obtain latest information on planning application, layout and building height.  The major planned uses in the vicinity of the area include:

·       Kai Tak Further Development proposed in Agreement No. CE35/2006 (CE) Kai Tak Development Engineering Study cum Design and Construction of Advance Works – Investigation, Design and Construction (Approved EIA Report: EIA-157/2008)

The locations of the representative ASRs for air quality assessment during the construction of the project are illustrated in Figures 7.1.1 to 7.1.14, and are summarised in the table below. Detailed information of representative ASRs are presented in Appendix 7.1.

Table 7.3:       Representative ASRs for Air Quality Impact Assessment

ASR ID

Location

Landuse [1]

No. of Storey

Approximate separation distance from project site boundary (m)

TAW-1

Carado Garden

TAW-1-1

Carado Garden Block 6

R

28

230

TAW-2

Shatin Heights

TAW-2-1

Shatin Heights

R

7

150

TAW-3

K K Terrace

TAW-3-1

K K Terrace

R

3

250

TAW-4

Woodcrest Hill

TAW-4-1

Woodcrest Hill Block 2&3

R

2

270

TAW-5

Residential Premises along Keng Hau Road

TAW-5-1

Chan’s Garden

R

2

200

TAW-5-2

L Louey

R

2

50

TAW-5-3

Joyville

R

1

110

TAW-6

Hin Keng Estate

TAW-6-1

Hin Keng Estate - Hin Yiu House

R

34

160

TAW-6-2

Carmel Alison Lam Primary School

E

7

130

TAW 6-3

Hin Keng Estate - Hin Tak House

R

34

110

TAW 6-4

Hin Keng Estate - Hin Yeung House

R

34

140

TAW 6-5

Hin Keng Estate - Hin Yau House

R

35

<10

TAW 6-6

Hin Keng Estate - Hin Kwai House

R

35

<10

TAW 6-7

C.U.H.K.A.A. Thomas Cheung School

E

6

<10

TAW 6-8

Hin Keng Estate - Hin Wan House

R

35

<10

TAW-7

Residential Premises along Tsuen Nam Road

TAW-7-1

Kam Cheong Building

R

5

900

TAW-8

Grandway Garden

TAW-8-1

Grandway Garden Block 2

R

24

750

TAW-9

Christian Alliance Cheng Wing Gee College

TAW-9-1

Christian Alliance Cheng Wing Gee College

E

6

470

TAW-10

Holford Garden

TAW-10-1

Holford Garden - Fook Siu Court

R

25

660

TAW-11

Man Lai Corut

TAW-11-1

Man Lai Court Tower 1

R

20

1100

TAW-12

Hin Tin Swimming Pool

TAW-12-1

Hin Tin Swimming Pool

GIC

-

<10

TAW-13

Hin Tin Playground

TAW-13-1

Football field inside Hin Tin Playground

GIC

-

<10

DIH-1

Tsui Chuk Garden

DIH-1-1

Tsui Chuk Garden Block 5

R

22

120

DIH-2

Chuk Yuen North Estate

DIH 2-1

Chuk Yuen North Estate – Pak Yuen House

R

34

280

DIH-3

Chuk Yuen South Estate

DIH-3-1

Chuk Yuen South Estate – Wah Yuen House

R

18

90

DIH-3-2

Chuk Yuen South Estate – Nga Yuen House

R

18

110

DIH-3-3

Chuk Yuen South Estate – Kwai Yuen House

R

18

90

DIH-3-4

Chuk Yuen South Estate – Chui Yuen House

R

18

50

DIH-4

Pang Ching Court

DIH-4-1

Pang Ching Court

R

34

150

DIH-4-2

Carbo Anglo-Chinese Kindergarten

E

2

70

DIH-5

Residential Premises along Fung Tak Road and Lunk Fung Street

DIH-5-1

Rainbow Home

R

11

70

DIH-5-2

Residential premises

R

6

70

DIH-5-5

Our Lady’s Kindergarten

E

2

60

DIH-6

Wong Tai Sin Fire Station and Quarters

DIH 6-1

Wong Tai Sin Fire Station and Quarters Block A

R

34

100

DIH-7

Tropicana Gardens

DIH-7-1

Tropicana Gardens Block 2

R

25

190

DIH-7-2

Tropicana Garden Block 3

R

25

190

DIH-8

Redmption Lutheran Church

DIH-8-1

Redemption Lutheran Church

W

3

130

DIH-9

Shek On Building

DIH-9-1

Shek On Building

E + W

5

30

DIH-10

Hong Kong Sheung Hui Nursing Home

DIH-10-1

Hong Kong Sheung Keung Hui Nursing Home

H

9

30

DIH-11

Lung Poon Court

DIH-11-1

Lung Poon Court – Lung Wan House

R

34

<10

DIH-12

Galaxia

DIH-12-1

Galaxia Tower B

R

44

100

DIH-12-2

Galaxia Tower E

R

43

40

DIH-13

Canossa Primary School

DIH-13-1

Canossa Primary School

E

5

80

DIH-14

Rhythm Garden

DIH-14-1

Rhythm Garden Block 2

R

22

<10

DIH-14-2

Rhythm Garden Block 5

R

22

<10

DIH-14-3

Rhythm Garden Block 8

R

22

110

DIH-14-4

Canossa Primary School (San Po Kong)

E

6

90

DIH-14-5

Rhythm Garden Block 1

R

22

<10

DIH-14-6

Rhythm Garden Block 3

R

22

<10

DIH-15

Choi Hung Estate

DIH-15-1

Choi Hung Estate - Kam Wan House

R

20

100

DIH-15-2

Choi Hung Estate - Pik Hoi House

R

20

100

DIH-16

Wong Tai Sin Temple

DIH-16-1

Wong Tai Sin Temple

W

1

20

DIH-17

Chuk Yuen United Village

DIH-17-1

Chuk Yuen United Village

R

1-3

60

DIH-18

Upper Wong Tai Sin Estate

DIH-18-1

Upper Wong Tai Sin Estate - Po Sin House

R

34

<10

DIH-18-2

Upper Wong Tai Sin Estate - Tat Sin House

R

34

20

DIH-19

Lung Cheung Government Secondary School

DIH-19-1

 Lung Cheung Government Secondary School

E

5

110

DIH-20

Baptist Rainbow Primary School

DIH-20-1

Baptist Rainbow Primary School

E

7

60

DIH-21

Tin Wang Court

DIH-21-1

Tin Wang Court - Wang King House

R

21

30

DIH-22

Price Memorial Catholic Primary School

DIH-22-1

Price Memorial Catholic Primary School

E

6

40

DIH-23

Tin Ma Court

DIH-23-1

Tin Ma Court - Chun On House

R

37

50

DIH-24

Shing Wong Temple

DIH-24-1

Shing Wong Temple

W

1

50

DIH-25

Choi Hung Road Playground

DIH-25-1

Football Field in Choi Hung Road Playground

GIC

-

80

DIH-26

Hammer Hill Road Leisure Pool

DIH-26-1

Hammer Hill Road Leisure Pool

GIC

-

270

KAT-1

Kowloon Cognito College

KAT-1-1

Kowloon Cognito College

E

5

210

TKW-1

Residential Premises along Pak Tai Street

TKW-1-1

Parc 22

R

11

<10

TKW-1-2

Sanford Mansion

R

14

<10

TKW-2

Skytower

TKW-2-1

Skytower Tower 5

R

47

<10

TKW-2-2

Skytower Tower 2

R

47

<10

TKW-3

Residential Premises near Prince Edward Road East & Prince Edward Road West

TKW-3-1

Prince Ritz

R

29

30

TKW-3-2

Prosperity House

R

3

<10

TKW-4

Sung Wong Toi Playground

TKW-4-1

Basketball Court in Sung Wong Toi Playground

GIC

-

30

TKW-5

Argyle Street Playground

TKW-5-1

Football Field in Argyle Street Playground

GIC

-

<10

MTW-6

Residential Premises along Ma Tau Chung Road

MTW-6-1

Fok On Building

R

11

60

MTW-6-2

Hong Kong Society for the Protection of Children

R

4

100

MTW-6-3

Chung Nam Mansion

R

10

100

MTW-6-4

Pok Oi Lau

R

6

130

MTW-7

Ma Tau Wai Estate

MTW-7-1

Ma Tau Wai Estate - Geranium House

R

13

200

MTW-8

Horae Place

MTW-8-1

Horae Place

R

17

210

MTW-9

Majestic Park

MTW-9-1

Majestic Park

R

17

250

MTW-10

18 Farm Road

MTW-10-1

18 Farm Road

R

42

200

MTW-11

Farm Road Government Primary School

MTW-11-1

Farm Road Government Primary School

E

3

190

MTW-12

Residential Premises along Ma Tau Wai Road

MTW-12-1

Yuet Fai Mansion

R

10

110

MTW-12-2

Delight Court

R

21

<10

MTW-12-3

Lucky Mansion

R

14

<10

MTW-12-4

352-354 Ma Tau Wai Rd

R

8

<10

MTW-12-5

Seng Cheong Building

R

10

<10

MTW-12-6

Great Wall Building

R

11

240

MTW-12-7

197-199 Ma Tau Wai Rd

R

6

200

MTW-12-8

Pak Tai Mansion

R

8

80

MTW-12-9

Residential premises along Hung Kwong Street

R

8

50

MTW-12-10

Lucky Building

R

8

<10

MTW-13

Cheung Chuk Shan Memorial School

MTW-13-1

Cheung Chuk Shan Memorial School

E

3

<10

MTW-14

Po Leung Kuk Lam Man Chan English Primary School

MTW-14-1

Po Leung Kuk Lam Man Chan English Primary School

E

3

20

MTW-15

Hung Hom Lutheran Primary School

MTW-15-1

Hung Hom Lutheran Primary School

E

4

<10

MTW-16

SKH Good Shepherd Primary School

MTW-16-1

SKH Good Shepherd Primary School

E

5

<10

MTW-17

Residential Premises along Chi Kiang Street, Anhui Street and Kiang His Street

MTW-17-1

Loyal Mansion

R

14

<10

MTW-18

Cheung Chuk Shan Memorial School

MTW-18-1

Residential premises along Chi Kiang Street

R

5

<10

MTW-19

Holy Trinity Church

MTW-19-1

Holy Trinity Church

W

1

100

MTW-20

Ma Tau Wai Road Playground

MTW-20-1

Football Field in Ma Tau Wai Road Playground

GIC

-

270

MTW-21

To Kwa Wan Market & Government Offices

MTW-21-1

To Kwa Wan Market & Government Offices

GIC

-

<10

MTW-22

Kowloon Animal Management Centre

MTW-22-1

Kowloon Animal Management Centre

GIC

-

290

HOM-1

Ko Shan Theatre

HOM-1-1

Ko Shan Theatre

P

3

60

HOM-2

Residential Premises along Ko Shan Road

HOM-2-1

Faerie Court

R

26

<10

HOM-2-2

Lee Wing Bldg

R

22

20

HOM-2-3

Wing Lam Mansion

R

23

70

HOM-2-4

Tak Lee Court

R

24

140

HOM-2-5

Chat Ma Mansion

R

8

30

HOM-3

Residential Premises along Shun Yung Street

HOM-3-1

Fook Sing Mansion

R

18

240

HOM-3-2

Marigold Mansion Block A

R

20

280

HOM-4

Residential Premises along Valley Road

HOM-4-1

Yee Fu Building

R

25

170

HOM-5

271 Chatham Road North

HOM-5-1

271 Chatham Road North

R

5

110

HUH-1

Residential Premises and Educational Institution along Chatham Road North and Hong Chong Road

HUH-1-1

Cartas Branchi College of Careers [2]

E

8

60

HUH-1-2

Lok Ka House

R

7

20

HUH-1-3

Wing Fung Building

R

8

<10

HUH-2

The Hong Kong Polytechnic University

HUH-2-1

Hong Kong Polytechnic University - Cheung On Tak Lecture Theatre

E

6

100

HUH-3

Residential Premises along Shun Yung Street

HUH-3-1

Royal Peninsula Block 2

R

42

140

HUH-4

The Metropolis Residence

HUH-4-1

The Metropolis Residence Tower 2

R

18

130

HUH-5

Harbour Plaza Metropolis

HUH-5-1

Harbour Plaza Metropolis

R

11

90

HUH-6

HK Fire Service Headquarters Building

HUH-6-1

HK Fire Services Headquarters Building

GIC

13

90

HUH-7

Hotel Nikko Hong Kong

HUH-7-1

Hotel Nikko Hong Kong

R

12

100

HUH-9

Hong Kong Coliseum

HUH-9-1

Hong Kong Coliseum

P

1

<10

HUH-10

Harbourfront Horizon

HUH-10-1

Harbourfront Horizon

R

22

240

HUH-11

China Travel Cargo Logistic Centre

HUH-11-1

China Travel Cargo Logistic Centre

I

-

30

Notes:

[1]   R– residential; E – educational; I – Industrial; H – clinic/ home for the aged; W – worship; GIC – government, institution and community; P – performing arts centres

[2]   The college has been moved to Tseung Kwan O since September 2009 and is now non-occupied.

Table 7.4:   Planned ASRs

ASR ID

Location

Landuse [1]

No. of Storey

TAW-P1

Top Side Residential Development at Tai Wai Maintenance Centre

TAW-P1

Top Side Residential Development at Tai Wai Maintenance Centre

R

[2]

TAW-P2

Tai Wai Station Development

TAW-P2

Tai Wai Station Development

R

[2]

DIH-P1

Upper Wong Tai Sin Estate Phase 3

DIH-P1-1

Upper Wong Tai Sin Estate Phase 3

R

36

KAT-P1

Residential premises near Kai Tak Station

KAT-P1-1

Residential premises near Kai Tak Station

R

[3]

KAT-P1-2

Residential premises near Kai Tak Station

R

[3]

KAT-P1-3

Residential premises near Kai Tak Station

R

[3]

KAT-P1-4

Residential premises near Kai Tak Station

R

[3]

KAT-P1-5

Residential premises near Kai Tak Station

R

[3]

KAT-P1-6

Residential premises near Kai Tak Station

R

[3]

KAT-P1-7

Residential premises near Kai Tak Station

R

[3]

KAT-P2

Public Housing Development at ex-San Po Kong Flatted Factory

KAT-P2-1

Public Housing Development at ex-San Po Kong Flatted Factory

R

[2]

TKW-P1

Residential premises near To Kwa Wan Station

TKW-P1-1

Residential premises near To Kwa Wan Station

R

[2]

HOM-P2

Proposed Dormitory for HKPU

HOM-P2

Proposed Dormitory for HKPU

R

-

Notes:

[1]   R– residential; E – educational; H – clinic/ home for the aged; W – worship; GIC – government, institution and community; P – performing arts centres

[2]   To be determined by respective project proponents

[3]   Not available from approved EIA Report: EIA-157/2008

7.4.2       Air Pollution Sources

Construction of the project would inevitably generate air pollutants with potential impacts on neighbouring sensitive receivers.  These air pollutant emission sources include fugitive dust from various construction activities, including excavation, stockpiling, and cut-and cover section along SCL (TAW-HUH) alignment. Three rock crushing facilities would be operated within Hin Keng, Ma Chai Hang and Shansi Street tunnel. Dust generated would then be enclosed within the tunnel. In addition, these rock crushing facilities are controlled under the Air Pollution Control (Specified Processess) Regulations, and the requirement and mitigation measures stipulated in the Guidance Note on the Best Practicable Means for Mineral Works (Stone Crushing Works) BPM 11/1(95) should also be followed and implemented. The contractor should also be responsible for applying licence under the regulations as appropriate. Hence, no significant dust impacts from these rock crushing facilities are therefore anticipated.

Apart from the above construction activities, loading and unloading of materials at barging facilities would also generate potential dust impact. Based on the latest construction programme, 2 barging facilities will be needed to support the material transfer. The locations of these barging facilities are listed below:

·       Freight Pier at Hung Hom (shared use); and

·       Kai Tak Runway

In addition, as only electrified trains would be used during the normal operation of the SCL (TAW-HUH), there are no air quality pollution sources during the operational phase. It should also be noted that this EIA study is assessed based on the design option of Diamond Hill Stabling Sidings (DHS). Details of the design are given in Section 3. There would also be no concrete batching plant operating under the SCL (TAW-HUH).

The tentative commencement year for the construction of SCL (TAW-HUH) is 2012, and would take approximately 6 years for completion.  All concurrent projects, which may have cumulative environmental impacts during its construction period, have been identified and summarised in the table below. Details of these concurrent projects are given in Section 7.6.2.

Table 7.5:   Key Concurrent Projects for Air Quality Assessment

Key Concurrent Projects

Tentative Construction Programme

Central Kowloon Route

2015 – 2020

Trunk Road T2

2012 – 2016

Kai Tak Development

2009 – 2021

Shatin to Central Link – Mong Kok East to Hung Hom Section (Phase I)

2012 – 2018

Shatin to Central Link – Hung Hom to Admiralty Section (Phase II)

2012 – 2020

Kwun Tong Line Extension

2011 – 2015

Polytechnic University Student Hostel at Ex-Valley Road Site

2009 – 2012

Tsz Wan Shan Pedestrian Link

2013-2015

In-situ Reprovisioning of Shatin Water Treatment Works – South Works

2012 - 2016

There are 3 existing concrete batching plants (CBPs) within the ex-Kai Tak Airport area, including the Yue Xiu CBP, Glorious CBP, and Yau Lee CBP. Based on the latest information provided by relevant government departments, the Yue Xiu CBP, Glorious CBP and the associated sand depot would cease operation before SCL commences construction. The dust emissions from the Yau Lee CBP, on the other hand, have been included in the cumulative impact assessment. In addition, the landlot next to the proposed TKW (as shown in Appendix 7.5) could be used for concrete batching plant or sand depot under short-term tenancy. Although the newly identified sites are yet to be confirmed, their potential emissions have been included in this assessment.

7.6.1       Potential Sources of Dust

A review has been conducted on the construction methodology (see Section 3 for details) for various works areas along SCL (TAW-HUH) alignment.  Construction dust will be potentially generated from mainly the land-based construction works including the following activities:

·      Soil excavation;

·      Backfilling;

·      Temporary storage of spoil on site;

·      Construction of portals and cut-&-cover tunnel;

·      Temporary storage, handling and transportation of material at tunnel exit sites;

·      Construction of infrastructure and utilities; and

·      Loading and unloading of excavated materials / fill materials at barging facility.

Since excavation and backfilling activities will involve large quantities of earthworks and silty material handling, it is anticipated that there may be larger dust impact as a result of these activities if appropriate mitigation measures are not implemented. On the other hand, the drill-&-blast activities underneath the Lion Rock and at Ho Man Tin will be undertaken totally underground. At tunnel exit sites, storage of material and associated handing / transportation activities will also be undertaken inside the tunnel. Three rock crushing facilities would be operated within Hin Keng, Ma Chai Hang and Shansi Street tunnel. Dust generated would then be enclosed within the tunnel. In addition, these rock crushing facilities are controlled under the Air Pollution Control (Specified Processess) Regulations, and the requirement and mitigation measures stipulated in the Guidance Note on the Best Practicable Means for Mineral Works (Stone Crushing Works) BPM 11/1(95) should also be followed and implemented. The contractor should also be responsible for applying licence under the regulations as appropriate.Hence, no significant dust impacts from these rock crushing facilities are therefore anticipated.

Other than construction sites, there are other off-site areas located in Tseung Kwan O, Ma On Shan, Shek Mun, and Pak Tin (see Section 3, and illustrated in Figure 1.2, and Figures 3.3.5 to 3.3.9). However, these off-site work areas, including magazine sites, and storage/office areas do not involve any dusty activities. Hence, fugitive dust generation is not expected throughout the processes and off-site works areas are not included in the quantitative assessment. The barging areas would however generate fugitive dust and hence need to be addressed.

7.6.2       Assessment Year

A review of the tentative construction programme has been conducted to identify the construction period which is deemed to have significant impact on nearby ASRs. Based on the construction programme as shown in Appendix 7.2, it is identified that all the dusty construction activities, such as open excavation and tunnel construction, would be taken place during Year 2014, particularly the worksites for KAT and TKW Station, where cumulative impacts from other projects in Kai Tak area are anticipated. For other stations and worksites of the SCL (TAW-HUH), construction activities throughout the whole construction period are generally similar. Hence, Year 2014 is considered appropriate to represent the worst-case scenario and are therefore taken as the assessment year.

7.6.3       Emission Inventory

Dust Emission associated with the Projects

Fugitive dust impact assessments were carried out based on conservative assumptions of general construction activities which include the following:

·      Heavy construction activities including site clearance, ground excavation, construction of the associated facilities, haul road etc;

·      Wind erosion of all active open sites, including stockpile and barging area;

·      Loading/unloading from trucks at barging facilities and stockpiles;

·      All construction activities at work sites and areas that would be undertaken concurrently during the major construction period throughout Year 2014 in order to assess the worst case situation

·      Construction working periods of 30 days a month and 12 hours a day from 7:00am to 7:00pm, except Sundays and public holidays.

The prediction of dust emissions is based on typical values and emission factors from United States Environmental Protection Agency (USEPA) Compilation of Air Pollution Emission Factors (AP-42), 5th Edition. Calculation of dust emission factors is given in Appendix 7.3.  References of the calculations of dust emission factors for different dust generating activities are listed below.  Detailed descriptions are also discussed in the following sections.

Table 7.6a: References of Dust Emission Factors for Different Activities

Operating Sites

Activities

Equations and Assumptions

Reference

All construction and excavation sites

Heavy construction activities including land clearance, ground excavation, cut and fill operations, construction of the facilities, haul road, etc

E   =   1.2 tons/acre/month of activity or

      =   2.69Mg/hectare/month of activity

 

USEPA AP42, S.13.2.3.3

All construction sites, any stockpile areas, barging area (all open sites)

Wind Erosion

 

E = 0.85 Mg/hectare/yr (24 hour emission)

USEPA AP42, S.11.9, Table 11.9.4

Barging facilities and/or any stockpiles

Loading/Unloading at barging facilities and any stockpile

 

k is particle size multiplier

U is average wind speed

M is material moisture content

USEPA AP42, S13.2.4

i)              SCL – Tai Wai to Hung Hom Section (SCL (TAW-HUH)) – Heavy Construction Works, Wind Erosion and Stockpile

Dust emission from construction vehicle movement will generally be limited within the confined worksites area and the emission factor given in AP-42 S.13.2.3.3 has taken this factor into account, as indicated in the approved EIA Study “Kai Tak Development” (EIA-157/208).  Watering facilities will be provided at every designated vehicular exit point.  Haul roads within the work sites would be paved and water spraying would be provided to keep them in wet condition. Since all vehicles will be washed at exit points and vehicle loaded with the dusty materials will be covered entirely by clean impervious sheeting before leaving the construction site, dust nuisance from construction vehicle movement outside the worksites is unlikely to be significant.

For stockpiling, it is recommended that vehicles will move to the stockpiling areas where C&D materials will be unloaded immediately. The vehicles will then be washed again before leaving the stockpiles in order to minimise generation of dusty materials. Therefore, the major dust generating activities at stockpiling areas will be originated mainly from wind erosion and loading/unloading of materials; and these will be assumed in the fugitive dust modelling.

For the calculation of 1-hr and 24-hr TSP concentration, an active operating area of 30% has been assumed at any one time. However, in order to be conservative, a 100% active area screening test has been undertaken initially for the short term hourly and daily TSP assessment as detailed in the Section 7.6.3.

For the calculation of annual TSP construction, the active works area over the entire year would be less than for a typical hour and typical day.  On this basis, further information has been obtained from the Project Proponent, and it is confirmed that a 6% active operating area would be a practicable assumption. The active operating area for 1-hr, 24-hr and annual concentration has been agreed by the Engineer. Appendix 7.4 presents the justification for the percentage of active areas.

It should be noted that there would still be some minor construction works being conducted during grouting. However, as all grouting works would be carried out in a caution way and fugitive dust generation can be controlled at a minimum level, there would be insignificant fugitive dust impacts from this source.

ii)             Barging Facility

Regarding the dust emission from the barging facilities adjacent to To Kwa Wan Typhoon Shelter (i.e. Kai Tak Runway), there will be a total of 3 barges at any one time during operation.  Good site practices including the following would be implemented:

·       All road surfaces within the barging facilities will be paved.

·       Dust enclosures will be provided for the loading ramp.

·       Vehicles will be required to pass through designated wheels wash facilities.

·       Continuous water spray at the loading points.

Dust Emission associated with Concurrent Projects

i)              SCL – Mong Kok East to Hung Hom Section and Hung Hom to Admiralty Section

Three sections in the SCL, the Tai Wai to Hung Hom Section (SCL (TAW-HUH)), Mong Kok East to Hung Hom Section (SCL (MKK-HUH)), and Hung Hom to Admiralty Section (SCL (HUH-ADM)) would have cumulative impacts. SCL (MKK-HUH) will include the realignment work for the existing East Rail Line tracks from south of Mong Kok East to the new HUH, while SCL (HUH-ADM) will include the construction of the section across the harbour from Hung Hom to Admiralty.

According to the current construction programme, construction works and dusty activity at the Freight Pier barging facility associated with the SCL (MKK-HUH) and SCL (HUH-ADM) will be interfacing this Project at Hung Hom Area. Appendix 7.6 illustrates the possible arrangement in Freight Pier Barging Facility. As such, cumulative dust impact is therefore anticipated. Dust emission details have been obtained from the respective consultant and included in the assessment to account for the cumulative effect.

ii)             Kwun Tong Line Extension (KTE) & associated EPIW

The KTE project is approximate 3km extension of the existing Kwun Tong Line from Yau Ma Tei Station to a new station at Whampoa and with an interchange with the SCL at the proposed HOM. It is expected to be completed in 2015.

With reference to the approved EIA Study “Kwun Tong Line Extension” (AEIAR-154/2010), construction works under KTE Project will likely be interfacing the SCL (TAW-HUH) in Hung Hom and Ho Man Tin areas. Potential dusty activities are generally similar to those associated with this Project. In particular, one rock crushing facility would be located at the worksite in HOM Station and two others would be located at the Freight Pier barging point. Hence, dust emissions are anticipated during unloading activities and the discharge point of the dust extraction systems. As such, cumulative dust impact is therefore anticipated. Dust emission details have been extracted from the approved EIA Study and all the assessment scenarios have been included in the assessment to account for the cumulative effect.

iii)            Kai Tak Development

Redevelopment plan for the former Kai Tak Airport area is proposed to optimise the development potential of the ex-airport site. It covers a land area of about 328 hectares, including the ex-Kai Tak Airport and existing waterfront area at To Kwa Wan, Kowloon Bay etc. According to the current development plan, the infrastructure works are split into 7 sub-packages, such as Cruise Terminal Development, Trunk Road T2 etc. This development is anticipated to commence in 2009, with completion beyond 2020.

Based on the construction programme presented in LegCo Papers on Kai Tak Development (LC Paper No. CB(1)570/08-09(03)), cumulative construction dust impact is expected during the interaction with major dusty construction works associated with SCL (TAW-HUH), which is expected to be undertaken in Year 2014. For the purpose of cumulative impact assessment, construction works which are located within 500m from the site boundary of this Project and are found to be overlapping with the major construction of SCL (TAW-HUH) during Year 2014 will be included. In addition, dust emission strengths presented in the approved EIA Study “Kai Tak Development” (KTD) (AEIAR-130/2009) are adopted where appropriate.

iv)            Central Kowloon Route

Central Kowloon Route (CKR) is a strategic road linking from Yau Ma Tai area to Kowloon Bay in order to relieve the vehicular traffic loading on the existing urban distributor roads. Based on the latest construction programme, the construction would likely be commenced in early 2015. For the purpose of conservative assessment, the associated construction works are considered to be overlapping with the construction of SCL (TAW-HUH) and the cumulative construction dust impact is therefore taken into account. Latest available information presented in the KTD EIA is adopted where appropriate in the assessment.

v)             Trunk Road T2

Trunk Road T2 is a dual two-lane trunk road of approximately 3.6 km long connecting the CKR and Tseung Kwan O-Lam Tin Tunnel, and will form a new strategic highway network in order to relieve the existing heavily trafficked road network in the central and eastern Kowloon as well as Tseung Kwan O. However, the alignment of Trunk Road T2 is located at more than 500m from ASRs of SCL (TAW-HUH). No significant cumulative air quality impact is therefore anticipated.

vi)            Polytechnic University Student Hostel at Ex-Valley Road

A student hostel to accommodate students from the Polytechnic University is proposed at the site bounded by Yan Fung Street to the North, Fat Kwong Street to the East, and Chatham Road North to the South. However, the construction will be completed by Year 2012. Hence, the associated cumulative air quality impact is not anticipated.

vii)           Tsz Wan Shan Pedestrian Link

Covered walkway as well as lifts/escalators are proposed to connect the Tsz Wan Shan residential to the DIH Station. Based on the current construction programme, the associated construction works would likely interface with the major construction of SCL (TAW-HUH) during Year 2014. Hence, cumulative dust impact is anticipated.

viii)          In-situ Reprovisioning of Shatin Water Treatment Works – South Works

The Shatin Water Treatment Works (STWTW) was first commissioned since 1964 with an initial rated capacity of 364,000 m3 per day at the existing South Works. Owing to the aging of plant and equipment which are approaching the end of their service life, renovation or replacement of existing facilities would be required to meet the anticipated future water demands. According to its EIA Study Brief (ESB-220/2011), major works would involve demolition of the existing facilities of the South Works in phases, reprovisioning of the South Works to the proposed output of 550,000 m3 per day, cut-back of the existing man-made slope, and construction of superstructures. This project is therefore considered as a concurrent project.

Based on the preliminary information available from the EIA Project Profile (PP-430/2011) of this project, the potential dust impact is considered to be insignificant with implementation of good site practice and dust suppression measures in view of the phasing of the works area and small works area.  Insurmountable cumulative dust impact is therefore not anticipated.

ix)            Concrete Batching Plants and Sand Depot in ex-Kai Tak Airport area

As discussed in Section 7.5, there are currently 3 existing concrete batching plants (CBPs) within the ex-Kai Tak Airport area, including the Yue Xiu CBP, Glorious CBP, and Yau Lee CBP. Based on the latest information, the Yue Xiu CBP, Glorious CBP and the associated sand depot would cease operation before SCL commences construction.  Hence, there would not be cumulative dust impacts from these 2 CBPs at their existing locations. The dust emissions from the Yau Lee CBP, on ther other hand, have been included in the cumulative impact assessment.

It was noted at the time of reporting that the site next to TKW (as shown in Appendix 7.5) could be allocated for the use of a new concrete batching plant and sand depot under short-term tenancy. However, information on the capacity of these facilities was not available for the assessment.  In order to reasonably consider cumulative impacts from the emissions of these potential albeit not yet committed sources, an estimation of the capacity of these facilities was made with reference to general practices of the industry.  It was assumed that the production capacity of the concrete batching plant would be 280 m3 per hour and the total silo capacity would be 1050 tonnes. Dust emissions associated with the plant, including emission from the dust collectors of silos and mixers, and unloading of raw material to ground hopper within the plant and Kai Tak Barging Facility, have therefore been assessed.

However, it should be noted that, the concrete batching plant is controlled under the Specified Process and hence sufficient mitigation measures would be implemented to control the emission of dust.  In general, the requirement and mitigation measures stipulated in the Guidance Note on the Best Practicable Means for Cement Works (Concrete Batching Plant) BPM 3/2(93) should be followed and implemented. In particular, in order to minimise the overall dust impact on nearby ASRs, the emission concentrations of the dust collector for the cement/PFA silos and mixer would be designed to not more than 30 mg/m3 and 40 mg/m3 respectively. For unloading of aggregate from trucks at the concrete batching plant, 3-sided enclosure with top cover and water sprays would be provided to the ground hopper. The enclosure would be designed in such a way that minimise the gap between the enclosure structure and the truck itself, which in turn would prevent dust from escaping the enclosure. With provision of watering spraying system, dust generated from unloading activities would be further suppressed within the enclosure, and hence would achieve an overall dust removal efficiency of 95%. It is understood that the design of the potential new CBP is still subject to change. The Contractor is required to demonstrate that the future design of the concrete batching plant would not cause unacceptable impacts. References of the calculations of dust emission factors for different dust generating activities are listed below.

Table 7.6b: References of Dust Emission Factors for Concrete Batching Plant

Operating Sites

Activities

Equations and Assumptions

Reference

Concrete Batching Plant

 

Dust collector for Cement/PFA Silos

E = 30 mg/m3

Design emission concentration

Dust collector for Mixer

E = 40 mg/m3

Design emission concentration

Loading/Unloading at barging facilities

k is particle size multiplier

U is average wind speed

M is material moisture content

USEPA AP42, S13.2.4

Unloading of Raw Material at Concrete Batching Plant

E = 0.0035 kg per ton of aggregate handled

USEPA AP42, S11.12

 

7.6.4       Assessment Methodology

Dust impact assessment was undertaken using the Fugitive Dust Model (FDM) as approved by USEPA and EPD.  It is a well-known Gaussian Plume model designed for computing air dispersion model for fugitive dust sources.  Modelling parameters including dust emission factors, particles size distributions, surface roughness, etc are referred to in EPD’s “Guideline on choice of models and model parameters” and USEPA’s AP-42.  The density of dust will be assumed to be 2.5g/m3.  The 5-year mean of the annual averaged TSP concentration will be taken as the background concentration.  As mentioned in Section 7.3, the TSP background concentrations of 65.4ug/m3 and 75.2ug/m3 are adopted for the Tai Wai and Kowloon Areas for the fugitive dust modelling respectively. A surface roughness of 100 cm is assumed in the model to represent the terrain.

During daytime working hours (7am to 7pm), it is assumed that dust emissions would be generated from all dust generating activities and site erosion. During night-time non-working hours (7pm to 7am of the next day), Sunday and statutory holidays, dust emission source would only be site erosion as construction activities during these hours are ceased.

The worst-case 1-hour, worst-case 24-hour average and annual TSP concentrations were calculated mainly based on real meteorological data (for Year 2008) on wind direction, wind speed, temperature and stability collected from the nearest weather station, the Hong Kong Observatory and Shatin meteorological stations for the construction site in the Kowloon Area and Tai Wai Area respectively. The anemometer height at Hong Kong Observatory and Shatin are 42m and 10m above ground respectively. A summary showing the validity of meteorological data from Year 2004 – 2008 respective to different weather stations is shown in Table 7.7.

Table 7.7:   Summary of Data Validity of Meteorological Data from Year 2004 – 2008

Stations

Data Validity

2004

2005

2006

2007

2008

Shatin

86%

85%

88%

92%

92%

Kai Tak

91%

96%

96%

89%

81%

King's Park

89%

92%

87%

90%

92%

HKO

97%

96%

95%

95%

95%

CPH

92%

94%

94%

93%

N/A

Fugitive dust assessment was conducted at 1.5m, 5m, 10m, 15m and 20m above local ground level. A summary of modelling parameters adopted in the assessment are given in the table below:

Table 7.8:   Modelling Parameters

Parameters

Input

Remark

Particle size distribution

1.25um = 7%

3.75um = 20%

7.5um = 20%

12.5um = 18%

22.5um = 35%

Reference from S13.2.4.3 of USEPA AP-42

Background Concentration

5-year averaged value recorded at Tsuen Wan, Kwai Chung, Sham Shui Po, Kwun Tong, Central/Western, and Shatin Monitoring Stations

Tsuen Wan, Kwai Chung, Sham Shui Po, Kwun Tong, Central/Western Monitoring Stations for Kowloon Area (75.2 μg/m3­­­­)

Shatin Monitoring Station for Tai Wai Area (65.4μg/m3­­­­)

Modeling mode

Flatted terrain

-

Meteorological data

Data recorded in 2008 at Hong Kong Observatory (HKO) and Shatin Meteorological Station

HKO for Kowloon Area (i.e. DIH to HUH)

Shatin for Tai Wai Area (i.e. TAW to HIK)

Anemometer Height

42m for HKO

10m for Tai Wai

-

Surface Roughness

100cm

-

Emission period

General construction activities during daytime working hours (7 am to 7 pm)

Wind erosion during both day-time (7am to 7pm) and night-time (7pm to 7am of the next day)

-

ASR calculating levels

1.5, 5, 10, 15, and 20m

-

In terms of the construction programme, it should be noted that the sequencing of works for each works activity over each works site or area will be determined by the Contractor and is not known at this stage.  However, due to the constrained size of the works sites and areas and the tight construction programme constraints, it will be necessary for active construction activities to be undertaken at moving multiple work phases spread across each site.  Therefore, it is not feasible to identify the exact locations of individual dust emission sources.  As such, for the long term annual predictions, the dust modelling assessment has assumed that the dust emissions would be distributed across the whole area of each site to reasonably represent this mode of working and the dust emission rates have been proportioned to produce the effect of 6% active works site. Appendices 7.2 and 7.4 present the tentative construction programme and justification for the percentage of active areas respectively.

For the barging point at the Kai Tak Runway, the annual 6% active area is not applicable in this case as the haul road would be continuous in use and hence 100% active area is assumed as the worst-case scenario. It should be noted that, applying 100% emission from the barging point haul road areas represents a very conservative assumption, in that it assumes a continuous use of the haul road by traffic with full capacity throughout the full construction period.

For the short term 1-hour and 24-hour periods, it is assumed that a total works area of 30% on each site would only be active at any one time and again active construction activities to be undertaken at moving multiple work faces spread across each site. Based upon this, works activities and plant would neither cover the whole site area nor be concentrated in certain areas of the site close to ASRs at any time during the construction period.  However, notwithstanding that such a scenario would not be expected to occur, in order to be conservative, an initial screening test has been undertaken, namely “Tier 1 Screening Test”.  The Tier 1 screening test is conservative and has simulated an absolute worst case situation, whereby all the worksites would be active (i.e. 100%).

The purpose of this absolute worst case Tier 1 screening assessment is to highlight those areas where construction dust may accumulate and potentially become an issue. The hot spot areas identified in the Tier 1 assessment have been subsequently assessed by a more focused Tier 2 test, where it is assumed that the projected actual 30% active works areas for the construction site is positioned closest to the potentially worst affected ASRs, while emission from all the other sites remain at 100% as per Tier 1. Thus, the Tier 2 assessment is also very conservative as it assumes that all works activities with the associated plant would be undertaken in the closest proximity to the potentially affected ASRs at the same time, which as noted above would not occur.

For the concurrent projects, including SCL (TAW-HUH), SCL (MKK-HUH), SCL (HUH-ADM), KTE, the Polytechnic University Student Hostel, and the Tsz Wan Shan Pedestrian Link, similar assumptions have been made for the calculations of the emission factors for short and long-term assessments. For the committed Kai Tai Development (KTD), as mentioned above, the dust emission strength presented in the approved KTD EIA are adopted where appropriate.

7.6.5       Assessment Results - Unmitigated Scenario

Cumulative construction dust impacts arisen from the Projects (i.e. SCL (TAW-HUH), SCL (MKK-HUH), SCL (HUH-ADM) and KTE), committed Kai Tai Development, and the Tsz Wan Shan Pedestrian Link have been assessed. Results of cumulative unmitigated 1-hour, 24-hour, and annual TSP impacts at identified ASRs due to the construction activities in the Tai Wai and Kowloon areas are given in Tables 7.9a-b and Tables 7.10a-b respectively. Results show that exceedances of the relevant Air Quality Objectives (AQOs) are predicted without mitigation and, therefore, mitigation measures are required to reduce dust impacts. Figures 7.2.0A – 7.2.0F illustrate the cumulative unmitigated 1-hour, 24-hour, and annual TSP concentrations in Tai Wai Area and Kowloon Area.

Table 7.9a:     Predicted Unmitigated Cumulative 1-hour and 24-hour TSP Concentrations at Various Heights above Ground in the Tai Wai Area (Including Background Concentration of 65.4μg/m3)

ASR ID

Location

1-hour TSP Concentrations at Various Height(μg/m3)

24-hour TSP Concentrations at Various Height(μg/m3)

1.5m

5m

10m

15m

20m

1.5m

5m

10m

15m

20m

TAW-1-1

Carado Garden Block 6

626

622

523

406

297

147

151

144

135

124

TAW-2-1

Shatin Heights

1121

1063

782

579

445

249

237

191

149

119

TAW-3-1

K K Terrace

939

928

733

522

373

177

172

158

140

123

TAW-4-1

Woodcrest Hill Block 2&3

842

842

690

519

367

193

187

152

129

115

TAW-5-1

Chan’s Garden

938

899

674

461

348

271

242

177

133

108

TAW-5-2

L Louey

2393

1859

911

614

447

444

338

225

167

133

TAW-5-3

Joyville

1283

1175

792

466

383

345

279

197

139

116

TAW-6-1

Hin Keng Estate - Hin Yiu House

956

829

596

434

318

185

190

174

156

137

TAW-6-2

Carmel Alison Lam Primary School

954

841

640

431

300

172

176

163

147

130

TAW 6-3

Hin Keng Estate - Hin Tak House

1078

912

651

403

311

179

183

167

148

130

TAW 6-4

Hin Keng Estate - Hin Yeung House

1486

1235

637

393

310

248

210

172

147

125

TAW 6-5

Hin Keng Estate - Hin Yau House

2999

1774

1077

616

476

760

420

241

166

128

TAW 6-6

Hin Keng Estate - Hin Kwai House

3976

1386

752

503

356

893

368

184

150

129

TAW 6-7

C.U.H.K.A.A. Thomas Cheung School

3322

1873

768

487

359

360

262

164

136

119

TAW 6-8

Hin Keng Estate - Hin Wan House

3964

1617

983

610

426

1091

439

225

161

126

TAW-7-1

Kam Cheong Building

385

408

378

340

298

113

117

114

111

107

TAW-8-1

Grandway Garden Block 2

402

422

385

343

301

119

123

119

115

110

TAW-9-1

Christian Alliance Cheng Wing Gee College

739

762

676

569

458

124

128

123

118

113

TAW-10-1

Holford Garden - Fook Siu Court

577

602

547

477

402

105

109

108

105

102

TAW-11-1

Man Lai Court Tower 1

314

336

316

291

263

103

107

105

103

100

TAW-12-1

Hin Tin Swimming Pool

4082

2494

1278

751

551

866

477

276

194

150

TAW-13-1

Football field inside Hin Tin Playground

4166

2007

1061

695

509

956

448

256

181

144

TAW-P1

Top Side Residential Development at Tai Wai Maintenance Centre

2811

2326

1353

762

538

345

317

239

190

153

TAW-P2

Tai Wai Station Development

451

476

436

385

329

126

131

127

122

116

Notes:

Values which exceeded AQO are shown as bolded characters

Table 7.9b:     Predicted Unmitigated Cumulative Annual TSP Concentrations at Various Heights above Ground in the Tai Wai Area (Including Background Concentration of 65.4μg/m3)

ASR ID

Location

Annual TSP Concentrations at Various Height(μg/m3)

1.5m

5m

10m

15m

20m

TAW-1-1

Carado Garden Block 6

65.8

65.9

65.8

65.8

65.7

TAW-2-1

Shatin Heights

66.2

66.1

65.9

65.8

65.7

TAW-3-1

K K Terrace

66.3

66.3

66.1

65.9

65.7

TAW-4-1

Woodcrest Hill Block 2&3

66.4

66.4

66.2

66.0

65.8

TAW-5-1

Chan’s Garden

67.5

67.4

66.9

66.4

66.1

TAW-5-2

L Louey

72.1

70.6

68.4

67.3

66.6

TAW-5-3

Joyville

69.0

68.6

67.6

66.8

66.3

TAW-6-1

Hin Keng Estate - Hin Yiu House

66.1

66.1

66.0

65.9

65.8

TAW-6-2

Carmel Alison Lam Primary School

66.1

66.1

66.0

65.9

65.8

TAW 6-3

Hin Keng Estate - Hin Tak House

66.4

66.3

66.1

66.0

65.9

TAW 6-4

Hin Keng Estate - Hin Yeung House

67.2

67.1

66.6

66.3

66.0

TAW 6-5

Hin Keng Estate - Hin Yau House

74.1

71.2

68.6

67.3

66.6

TAW 6-6

Hin Keng Estate - Hin Kwai House

77.5

70.5

67.6

66.7

66.2

TAW 6-7

C.U.H.K.A.A. Thomas Cheung School

67.0

66.8

66.3

66.1

65.9

TAW 6-8

Hin Keng Estate - Hin Wan House

75.6

71.4

68.5

67.2

66.5

TAW-7-1

Kam Cheong Building

65.6

65.6

65.6

65.6

65.6

TAW-8-1

Grandway Garden Block 2

65.6

65.6

65.6

65.6

65.6

TAW-9-1

Christian Alliance Cheng Wing Gee College

65.7

65.8

65.7

65.7

65.7

TAW-10-1

Holford Garden - Fook Siu Court

65.6

65.6

65.6

65.6

65.6

TAW-11-1

Man Lai Court Tower 1

65.5

65.5

65.5

65.5

65.5

TAW-12-1

Hin Tin Swimming Pool

73.6

68.3

66.9

66.4

66.1

TAW-13-1

Football field inside Hin Tin Playground

80.3

71.9

68.2

67.0

66.4

TAW-P1

Top Side Residential Development at Tai Wai Maintenance Centre

67.0

66.9

66.5

66.2

66.0

TAW-P2

Tai Wai Station Development

65.6

65.6

65.6

65.6

65.6

Notes:

Values which exceeded AQO are shown as bolded characters

Table 7.10a:   Predicted Unmitigated Cumulative 1-hour and 24-hour TSP Concentrations at Various Heights above Ground in the Kowloon Area (Including Background Concentration of 75.2μg/m3)

ASR ID

Location

1-hour TSP Concentrations at Various Height(μg/m3)

24-hour TSP Concentrations at Various Height(μg/m3)

1.5m

5m

10m

15m

20m

1.5m

5m

10m

15m

20m

DIH-1-1

Tsui Chuk Garden Block 5

1929

1604

853

582

450

518

472

327

233

187

DIH 2-1

Chuk Yuen North Estate – Pak Yuen House

832

878

791

683

570

237

247

223

198

176

DIH-3-1

Chuk Yuen South Estate – Wah Yuen House

1163

1080

926

758

603

363

343

294

252

215

DIH-3-2

Chuk Yuen South Estate – Nga Yuen House

1222

1106

975

812

642

303

296

246

213

189

DIH-3-3

Chuk Yuen South Estate – Kwai Yuen House

1678

1353

787

545

456

518

436

293

237

203

DIH-3-4

Chuk Yuen South Estate – Chui Yuen House

1707

1291

1078

878

679

454

347

242

212

189

DIH-4-1

Pang Ching Court

1300

1090

745

644

539

286

271

249

223

197

DIH-4-2

Carbo Anglo-Chinese Kindergarten

2477

1540

765

629

518

522

451

282

223

197

DIH-5-1

Rainbow Home

1377

1401

1177

911

659

426

334

280

241

203

DIH-5-2

Residential premises

1502

1511

1221

896

607

344

354

308

257

209

DIH-5-5

Our Lady’s Kindergarten

1396

1183

1024

829

633

282

286

255

226

197

DIH 6-1

Wong Tai Sin Fire Station and Quarters Block A

1781

1781

1436

1050

709

357

361

308

247

204

DIH-7-1

Tropicana Gardens Block 2

2478

2361

1704

1077

704

562

545

417

295

211

DIH-7-2

Tropicana Garden Block 3

2261

2189

1638

1084

663

497

489

388

286

210

DIH-8-1

Redemption Lutheran Church

3239

2889

1827

1028

752

985

905

619

396

271

DIH-9-1

Shek On Building

5678

3599

1705

1065

758

2317

1436

658

371

260

DIH-10-1

Hong Kong Sheung Keung Hui Nursing Home

4396

2865

1499

976

716

1501

1116

620

347

245

DIH-11-1

Lung Poon Court – Lung Wan House

4194

2434

1292

862

641

1753

804

408

312

259

DIH-12-1

Galaxia Tower B

2871

2534

1613

1033

794

619

599

488

380

299

DIH-12-2

Galaxia Tower E

3390

2345

1548

1025

778

817

645

448

355

285

DIH-13-1

Canossa Primary School

4105

3140

1676

1057

763

1576

1271

696

377

262

DIH-14-1

Rhythm Garden Block 2

3193

2588

1599

1329

1054

1034

647

342

300

269

DIH-14-2

Rhythm Garden Block 5

3157

3051

2296

1629

1238

504

478

360

301

263

DIH-14-3

Rhythm Garden Block 8

2181

2157

1742

1373

1027

457

468

423

368

312

DIH-14-4

Canossa Primary School (San Po Kong)

2243

1925

1273

1057

834

737

651

415

286

264

DIH-14-5

Rhythm Garden Block 1

4404

3138

1583

1191

974

1261

660

326

292

266

DIH-14-6

Rhythm Garden Block 3

2578

2280

1807

1452

1110

864

603

355

305

269

DIH-15-1

Choi Hung Estate - Kam Wan House

2552

2388

1957

1621

1287

277

284

257

240

221

DIH-15-2

Choi Hung Estate - Pik Hoi House

2736

2831

2397

1902

1440

311

321

292

269

244

DIH-16-1

Wong Tai Sin Temple

2068

1328

1146

925

702

473

402

344

292

241

DIH-17-1

Chuk Yuen United Village

1500

1515

1254

953

673

438

447

385

312

243

DIH-18-1

Upper Wong Tai Sin Estate - Po Sin House

2164

859

753

649

537

555

311

264

228

195

DIH-18-2

Upper Wong Tai Sin Estate - Tat Sin House

2309

951

783

666

542

765

318

286

251

216

DIH-19-1

Lung Cheung Government Secondary School

1868

1458

694

613

523

308

286

260

230

201

DIH-20-1

Baptist Rainbow Primary School

2504

1373

745

573

460

854

578

262

227

197

DIH-21-1

Tin Wang Court - Wang King House

3607

1936

907

561

465

1592

800

319

223

191

DIH-22-1

Price Memorial Catholic Primary School

2768

1394

713

511

448

686

459

271

214

191

DIH-23-1

Tin Ma Court - Chun On House

2163

1251

687

500

440

737

458

255

217

189

DIH-24-1

Shing Wong Temple

2586

1533

786

588

501

391

314

271

229

194

DIH-25-1

Football Field in Choi Hung Road Playground

2020

1813

1145

725

580

617

531

376

256

212

DIH-26-1

Hammer Hill Road Leisure Pool

1915

2047

1838

1577

1299

272

284

258

227

208

KAT-1-1

Kowloon Cognito College

1373

1338

1040

796

581

562

550

430

309

230

TKW-1-1

Parc 22

4678

3637

2461

1600

1105

1372

1033

704

485

353

TKW-1-2

Sanford Mansion

3619

3416

2490

1702

1171

1052

934

670

483

358

TKW-2-1

Skytower Tower 5

3136

2625

2059

1660

1283

1119

973

666

478

376

TKW-2-2

Skytower Tower 2

3206

3077

2343

1711

1251

1042

953

676

486

372

TKW-3-1

Prince Ritz

2616

2129

1292

959

663

926

815

514

362

288

TKW-3-2

Prosperity House

3991

2059

1262

977

709

1054

759

525

350

285

TKW-4-1

Basketball Court in Sung Wong Toi Playground

5363

3881

2286

1477

1015

1872

1056

563

399

320

TKW-5-1

Football Field in Argyle Street Playground

3331

2896

1981

1375

973

1194

996

590

406

310

MTW-6-1

Fok On Building

4650

4241

2937

1966

1346

803

746

547

389

288

MTW-6-2

Hong Kong Society for the Protection of Children

4061

3871

2870

1982

1362

644

624

490

367

279

MTW-6-3

Chung Nam Mansion

3401

3257

2432

1673

1188

733

713

566

426

321

MTW-6-4

Pok Oi Lau

3436

3369

2646

1933

1373

601

592

483

374

288

MTW-7-1

Ma Tau Wai Estate - Geranium House

2511

2553

2157

1703

1280

524

533

465

387

314

MTW-8-1

Horae Place

2045

2121

1864

1556

1245

501

513

457

390

325

MTW-9-1

Majestic Park

1901

1986

1770

1504

1228

443

457

414

362

308

MTW-10-1

18 Farm Road

1760

1678

1424

1239

1050

448

443

392

341

296

MTW-11-1

Farm Road Government Primary School

1626

1683

1500

1306

1102

402

414

377

336

293

MTW-12-1

Yuet Fai Mansion

1309

1381

1253

1091

917

373

394

363

325

284

MTW-12-2

Delight Court

2422

1401

1170

1045

906

441

367

343

312

278

MTW-12-3

Lucky Mansion

3392

1353

1106

999

879

973

459

338

304

273

MTW-12-4

352-354 Ma Tau Wai Rd

2735

1289

1059

961

850

874

414

337

301

270

MTW-12-5

Seng Cheong Building

3681

1322

882

803

718

1175

540

324

274

247

MTW-12-6

Great Wall Building

1594

1644

1433

1224

1035

456

465

417

362

310

MTW-12-7

197-199 Ma Tau Wai Rd

1477

1537

1362

1147

943

417

436

396

346

298

MTW-12-8

Pak Tai Mansion

1452

1324

1212

1072

918

378

397

368

331

291

MTW-12-9

Residential premises along Hung Kwong Street

2068

1523

1193

1061

916

368

387

360

325

288

MTW-12-10

Lucky Building

2855

1733

926

801

715

817

570

355

295

261

MTW-13-1

Cheung Chuk Shan Memorial School

3550

1547

1159

1041

908

767

398

351

320

285

MTW-14-1

Po Leung Kuk Lam Man Chan English Primary School

2256

1433

1117

1007

885

467

383

347

317

284

MTW-15-1

Hung Hom Lutheran Primary School

3390

1632

1115

1006

884

999

364

340

312

280

MTW-16-1

SKH Good Shepherd Primary School

4104

1420

1075

974

859

1173

415

334

306

276

MTW-17-1

Loyal Mansion

2065

1427

911

806

722

695

524

329

271

242

MTW-18-1

Residential premises along Chi Kiang Street

3554

1175

920

842

753

841

407

282

258

236

MTW-19-1

Holy Trinity Church

3666

3407

2409

1608

1082

1091

887

564

372

296

MTW-20-1

Football Field in Ma Tau Wai Road Playground

2141

2216

1941

1609

1277

480

493

440

377

315

MTW-21-1

To Kwa Wan Market & Government Offices

3551

1152

943

859

765

1193

423

323

292

265

MTW-22-1

Kowloon Animal Management Centre

1682

1744

1533

1282

1027

556

569

494

410

334

HOM-1-1

Ko Shan Theatre

1426

1162

1028

881

747

395

362

315

276

243

HOM-2-1

Faerie Court

2961

1302

1029

836

719

904

451

351

284

244

HOM-2-2

Lee Wing Bldg

3878

1964

1142

888

738

1212

646

372

289

245

HOM-2-3

Wing Lam Mansion

2657

2094

1253

918

751

660

558

380

295

248

HOM-2-4

Tak Lee Court

1879

1780

1310

972

774

432

425

350

289

247

HOM-2-5

Chat Ma Mansion

1856

1552

990

822

724

676

502

349

267

232

HOM-3-1

Fook Sing Mansion

1394

1427

1204

980

799

330

341

307

270

239

HOM-3-2

Marigold Mansion Block A

1152

1219

1092

944

801

274

289

270

248

225

HOM-4-1

Yee Fu Building

1293

1170

958

861

758

248

263

250

239

224

HOM-5-1

271 Chatham Road North

1823

1467

964

869

767

349

315

242

231

215

HUH-1-1

Cartas Branchi College of Careers [2]

2963

1777

932

847

754

778

562

287

229

216

HUH-1-2

Lok Ka House

2759

1194

891

839

763

995

497

244

239

229

HUH-1-3

Wing Fung Building

3178

1412

992

861

777

1077

520

296

253

228

HUH-2-1

Hong Kong Polytechnic University - Cheung On Tak Lecture Theatre

1322

1230

956

798

698

454

430

331

253

217

HUH-3-1

Royal Peninsula Block 2

634

688

649

600

545

234

247

232

215

198

HUH-4-1

The Metropolis Residence Tower 2

775

746

597

559

515

238

238

221

203

187

HUH-5-1

Harbour Plaza Metropolis

573

599

571

538

500

206

210

197

189

179

HUH-6-1

HK Fire Services Headquarters Building

667

726

680

625

568

230

239

225

208

190

HUH-7-1

Hotel Nikko Hong Kong

617

661

612

557

516

216

228

216

201

186

HUH-9-1

Hong Kong Coliseum

Note [3]

Note [3]

565

530

490

Note [3]

Note [3]

210

197

184

HUH-10-1

Harbourfront Horizon

Note [3]

585

560

530

495

Note [3]

201

194

186

178

HUH-11-1

China Travel Cargo Logistic Centre

1207

936

698

652

600

434

337

259

225

196

DIH-P1-1

Upper Wong Tai Sin Estate Phase 3

3463

1092

727

627

520

1370

472

290

244

211

KAT-P1-1

Residential premises near Kai Tak Station

See Note [1] 

KAT-P1-2

Residential premises near Kai Tak Station

See Note [1] 

KAT-P1-3

Residential premises near Kai Tak Station

See Note [2] 

KAT-P1-4

Residential premises near Kai Tak Station

See Note [2] 

KAT-P1-5

Residential premises near Kai Tak Station [4]

Note [3]

5586

3272

2067

1352

Note [3]

1102

687

478

354

KAT-P1-6

Residential premises near Kai Tak Station [4]

Note [3]

2568

1961

1396

1013

Note [3]

845

647

468

341

KAT-P1-7

Residential premises near Kai Tak Station

See Note [2] 

KAT-P2-1

Public Housing Development at ex-San Po Kong Flatted Factory

1938

1896

1451

1045

812

544

507

379

339

297

TKW-P1-1

Residential premises near To Kwa Wan Station

See Note [2] 

HOM-P2

Proposed Dormitory for HKPU

1157

1138

1037

915

791

253

268

254

237

218

Notes:

Values which exceeded AQO are shown as bolded characters

 [1]  The population intake of this project would be after Year 2016 (Referenced from approved Kai Tak Development EIA Report), and hence there are no cumulative construction dust impact from the projects

[2]   The premises is located within the works site boundary, hence the population intake would be after the construction of the Project i.e. no impact from the Project

[3]   No air sensitive use is observed at such levels –

Hong Kong Coliseum (HUH-9-1):

Air sensitive use is on the podium of the HUH station, which is at least 10mAG. First assessment height is therefore considered at 10mAG.

Harbourfront Horizon (HUH-10-1):

The first floor of residential units is situated on the podium, which is at least 5m above ground. First assessment height is therefore considered at 5mAG.

Residential premises near Kai Tak Station (KAT-P1-5 / KAT-P1-6):

These residential premises are currently occupied for the construction of public rental housing, which would have a 5m height lift lobby on the ground floor. First assessment height is therefore considered at 5mAG

[4]   The assessment results are for indication only as there are no air sensitive uses when the Yau Lee CBP is in operation.

Table 7.10b:   Predicted Unmitigated Cumulative Annual TSP Concentrations at Various Heights above Ground in the Kowloon Area (Including Background Concentration of 75.2μg/m3)

ASR ID

Location

Annual TSP Concentrations at Various Height(μg/m3)

1.5m

5m

10m

15m

20m

DIH-1-1

Tsui Chuk Garden Block 5

77.5

77.5

77.0

76.7

76.4

DIH 2-1

Chuk Yuen North Estate – Pak Yuen House

75.9

76.0

75.9

75.8

75.7

DIH-3-1

Chuk Yuen South Estate – Wah Yuen House

77.4

77.4

77.0

76.7

76.4

DIH-3-2

Chuk Yuen South Estate – Nga Yuen House

76.4

76.4

76.2

76.1

76.0

DIH-3-3

Chuk Yuen South Estate – Kwai Yuen House

79.7

79.3

78.2

77.3

76.8

DIH-3-4

Chuk Yuen South Estate – Chui Yuen House

77.0

76.9

76.6

76.3

76.1

DIH-4-1

Pang Ching Court

76.6

76.6

76.4

76.3

76.1

DIH-4-2

Carbo Anglo-Chinese Kindergarten

76.9

76.9

76.5

76.3

76.1

DIH-5-1

Rainbow Home

77.8

77.4

76.8

76.4

76.1

DIH-5-2

Residential premises

76.9

76.8

76.5

76.2

76.0

DIH-5-5

Our Lady’s Kindergarten

76.6

76.6

76.4

76.2

76.0

DIH 6-1

Wong Tai Sin Fire Station and Quarters Block A

76.9

76.9

76.7

76.4

76.2

DIH-7-1

Tropicana Gardens Block 2

77.9

77.9

77.5

77.0

76.6

DIH-7-2

Tropicana Garden Block 3

77.5

77.5

77.2

76.8

76.5

DIH-8-1

Redemption Lutheran Church

82.5

82.3

80.7

79.2

78.1

DIH-9-1

Shek On Building

98.7

92.2

84.9

81.1

79.1

DIH-10-1

Hong Kong Sheung Keung Hui Nursing Home

92.7

89.2

84.0

81.0

79.1

DIH-11-1

Lung Poon Court – Lung Wan House

98.1

84.0

78.8

77.2

76.5

DIH-12-1

Galaxia Tower B

79.2

79.0

78.0

77.2

76.6

DIH-12-2

Galaxia Tower E

78.8

78.3

77.3

76.7

76.3

DIH-13-1

Canossa Primary School

89.1

87.6

83.7

80.9

79.1

DIH-14-1

Rhythm Garden Block 2

88.7

79.5

77.2

76.5

76.1

DIH-14-2

Rhythm Garden Block 5

77.6

77.6

77.1

76.6

76.3

DIH-14-3

Rhythm Garden Block 8

78.2

78.1

77.4

76.9

76.5

DIH-14-4

Canossa Primary School (San Po Kong)

81.4

80.5

78.5

77.2

76.5

DIH-14-5

Rhythm Garden Block 1

90.1

79.7

77.2

76.5

76.1

DIH-14-6

Rhythm Garden Block 3

82.0

78.4

77.1

76.5

76.1

DIH-15-1

Choi Hung Estate - Kam Wan House

76.7

76.7

76.4

76.1

76.0

DIH-15-2

Choi Hung Estate - Pik Hoi House

76.5

76.5

76.3

76.2

76.0

DIH-16-1

Wong Tai Sin Temple

81.2

79.2

77.6

76.9

76.6

DIH-17-1

Chuk Yuen United Village

77.8

77.6

77.1

76.8

76.5

DIH-18-1

Upper Wong Tai Sin Estate - Po Sin House

81.4

79.1

77.7

77.1

76.8

DIH-18-2

Upper Wong Tai Sin Estate - Tat Sin House

84.2

78.9

77.5

77.0

76.7

DIH-19-1

Lung Cheung Government Secondary School

77.6

77.7

77.3

76.9

76.7

DIH-20-1

Baptist Rainbow Primary School

81.2

80.0

78.2

77.2

76.7

DIH-21-1

Tin Wang Court - Wang King House

91.9

85.8

80.2

78.0

77.1

DIH-22-1

Price Memorial Catholic Primary School

84.5

82.1

79.0

77.6

76.9

DIH-23-1

Tin Ma Court - Chun On House

82.8

80.9

78.4

77.3

76.8

DIH-24-1

Shing Wong Temple

79.2

78.7

77.7

77.1

76.8

DIH-25-1

Football Field in Choi Hung Road Playground

83.0

82.5

80.5

79.0

77.9

DIH-26-1

Hammer Hill Road Leisure Pool

76.6

76.6

76.5

76.3

76.1

KAT-1-1

Kowloon Cognito College

80.2

80.3

79.6

78.8

78.0

TKW-1-1

Parc 22

87.5

86.3

83.8

82.1

80.9

TKW-1-2

Sanford Mansion

85.5

85.3

83.5

82.0

80.8

TKW-2-1

Skytower Tower 5

86.6

86.3

84.1

82.4

81.1

TKW-2-2

Skytower Tower 2

86.0

85.8

83.8

82.2

80.9

TKW-3-1

Prince Ritz

87.0

87.1

85.5

83.9

82.4

TKW-3-2

Prosperity House

86.8

86.6

85.0

83.5

82.1

TKW-4-1

Basketball Court in Sung Wong Toi Playground

104.6

97.9

89.4

85.1

82.7

TKW-5-1

Football Field in Argyle Street Playground

95.0

93.1

88.4

85.2

83.0

MTW-6-1

Fok On Building

84.6

84.6

83.1

81.8

80.8

MTW-6-2

Hong Kong Society for the Protection of Children

84.0

84.2

83.0

81.8

80.8

MTW-6-3

Chung Nam Mansion

82.8

83.1

82.3

81.3

80.4

MTW-6-4

Pok Oi Lau

82.3

82.7

81.9

81.1

80.3

MTW-7-1

Ma Tau Wai Estate - Geranium House

81.5

81.9

81.4

80.8

80.2

MTW-8-1

Horae Place

81.8

82.2

81.7

81.0

80.3

MTW-9-1

Majestic Park

81.6

81.8

81.2

80.6

80.1

MTW-10-1

18 Farm Road

81.3

81.7

81.2

80.7

80.1

MTW-11-1

Farm Road Government Primary School

80.9

81.3

80.9

80.4

79.9

MTW-12-1

Yuet Fai Mansion

81.0

81.4

81.0

80.5

79.9

MTW-12-2

Delight Court

81.3

81.3

80.7

80.2

79.7

MTW-12-3

Lucky Mansion

88.9

83.0

80.7

79.9

79.4

MTW-12-4

352-354 Ma Tau Wai Rd

93.5

84.0

80.8

79.8

79.2

MTW-12-5

Seng Cheong Building

92.5

84.3

80.3

79.1

78.5

MTW-12-6

Great Wall Building

81.9

82.1

81.6

81.0

80.4

MTW-12-7

197-199 Ma Tau Wai Rd

81.4

81.8

81.4

80.8

80.2

MTW-12-8

Pak Tai Mansion

81.1

81.5

81.1

80.6

80.0

MTW-12-9

Residential premises along Hung Kwong Street

81.0

81.4

81.0

80.5

79.9

MTW-12-10

Lucky Building

88.0

82.0

79.9

79.2

78.7

MTW-13-1

Cheung Chuk Shan Memorial School

83.2

81.6

80.8

80.3

79.8

MTW-14-1

Po Leung Kuk Lam Man Chan English Primary School

82.5

81.9

80.9

80.3

79.7

MTW-15-1

Hung Hom Lutheran Primary School

86.1

81.8

80.7

80.1

79.6

MTW-16-1

SKH Good Shepherd Primary School

88.3

82.6

80.7

80.0

79.4

MTW-17-1

Loyal Mansion

87.9

83.8

80.2

79.0

78.4

MTW-18-1

Residential premises along Chi Kiang Street

83.1

81.2

79.7

79.0

78.5

MTW-19-1

Holy Trinity Church

92.3

91.3

87.5

84.5

82.4

MTW-20-1

Football Field in Ma Tau Wai Road Playground

81.4

81.8

81.3

80.7

80.1

MTW-21-1

To Kwa Wan Market & Government Offices

89.8

81.7

80.1

79.5

79.0

MTW-22-1

Kowloon Animal Management Centre

86.7

86.9

85.4

83.7

82.2

HOM-1-1

Ko Shan Theatre

81.4

80.6

79.2

78.3

77.8

HOM-2-1

Faerie Court

87.9

81.4

79.1

78.3

77.9

HOM-2-2

Lee Wing Bldg

83.0

80.2

78.6

78.0

77.6

HOM-2-3

Wing Lam Mansion

79.5

79.2

78.4

77.9

77.5

HOM-2-4

Tak Lee Court

78.4

78.5

78.1

77.7

77.4

HOM-2-5

Chat Ma Mansion

82.5

80.8

79.1

78.3

77.8

HOM-3-1

Fook Sing Mansion

77.9

78.1

77.9

77.6

77.4

HOM-3-2

Marigold Mansion Block A

77.6

77.8

77.7

77.6

77.4

HOM-4-1

Yee Fu Building

77.5

77.7

77.7

77.7

77.6

HOM-5-1

271 Chatham Road North

78.0

78.2

78.2

78.3

78.0

HUH-1-1

Cartas Branchi College of Careers [2]

80.6

80.0

78.8

78.2

77.8

HUH-1-2

Lok Ka House

85.0

81.0

78.5

77.8

77.4

HUH-1-3

Wing Fung Building

86.0

81.0

78.3

77.4

77.0

HUH-2-1

Hong Kong Polytechnic University - Cheung On Tak Lecture Theatre

79.9

79.3

78.0

77.2

76.8

HUH-3-1

Royal Peninsula Block 2

77.5

77.5

77.2

76.9

76.7

HUH-4-1

The Metropolis Residence Tower 2

76.9

77.0

76.9

76.7

76.5

HUH-5-1

Harbour Plaza Metropolis

78.0

77.9

77.4

77.0

76.7

HUH-6-1

HK Fire Services Headquarters Building

79.9

79.8

78.9

78.1

77.5

HUH-7-1

Hotel Nikko Hong Kong

78.4

78.4

77.9

77.4

77.0

HUH-9-1

Hong Kong Coliseum

Note [3]

Note [3]

77.1

76.8

76.5

HUH-10-1

Harbourfront Horizon

Note [3]

79.0

77.8

77.1

76.7

HUH-11-1

China Travel Cargo Logistic Centre

79.4

78.4

77.4

76.9

76.6

DIH-P1-1

Upper Wong Tai Sin Estate Phase 3

91.3

81.6

78.2

77.2

76.7

KAT-P1-1

Residential premises near Kai Tak Station

See Note [1] 

KAT-P1-2

Residential premises near Kai Tak Station

See Note [1] 

KAT-P1-3

Residential premises near Kai Tak Station

See Note [2] 

KAT-P1-4

Residential premises near Kai Tak Station

See Note [2] 

KAT-P1-5

Residential premises near Kai Tak Station [4]

Note [3]

84.1

79.4

78.0

77.2

KAT-P1-6

Residential premises near Kai Tak Station [4]

Note [3]

84.8

83.3

82.0

80.8

KAT-P1-7

Residential premises near Kai Tak Station

See Note [2] 

KAT-P2-1

Public Housing Development at ex-San Po Kong Flatted Factory

79.2

79.1

78.3

77.5

76.9

TKW-P1-1

Residential premises near To Kwa Wan Station

See Note [2] 

HOM-P2

Proposed Dormitory for HKPU

77.5

77.7

77.6

77.6

77.3

 

Notes:

Values which exceeded AQO are shown as bolded characters

 [1]  The population intake of this project would be after Year 2016 (Referenced from approved Kai Tak Development EIA Report), and hence there are no cumulative construction dust impact from the projects

[2]   The premises is located within the works site boundary, hence the population intake would be after the construction of the Project i.e. no impact from the Project

[3]   No air sensitive use is observed at such levels –

Hong Kong Coliseum (HUH-9-1):

Air sensitive use is on the podium of the HUH station, which is at least 10mAG. First assessment height is therefore considered at 10mAG.

Harbourfront Horizon (HUH-10-1):

The first floor of residential units is situated on the podium, which is at least 5m above ground. First assessment height is therefore considered at 5mAG.

Residential premises near Kai Tak Station (KAT-P1-5 / KAT-P1-6):

These residential premises are currently occupied for the construction of public rental housing, which would have a 5m height lift lobby on the ground floor. First assessment height is therefore considered at 5mAG

[4]   The assessment results are for indication only as there are no air sensitive uses when the Yau Lee CBP is in operation.

7.6.6       Recommended Mitigation Measures for Fugitive Dust

In order to reduce the dust emission from the Project and achieve compliances of TSP criteria at ASRs, the following specific mitigation measures are recommended:

i)        Mitigation measures in form of regular watering under a good site practice should be adopted. In accordance with the “Control of Open Fugitive Dust Sources” (USEPA AP-42) as given in Appendix 7.4, watering once per hour on exposed worksites and haul road in Kowloon area and once per 1.5 hour at those in Tai Wai area are proposed to achieve dust removal efficiencies of 91.7% and 87.5% respectively. These dust suppression efficiencies are derived based on the average haul road traffic, average evaporation rate and an assumed application intensity of 1.8 L/m2 for the respective watering frequencies (see Appendix 7.4).  Any potential dust impact and watering mitigation would be subject to the actual site conditions.  For example, a construction activity that produces inherently wet conditions or in cases under rainy weather, the above water application intensity may not be unreservedly applied.  While the above watering frequencies are to be followed, the extent of watering may vary depending on actual site conditions but should be sufficient to maintain an equivalent intensity of no less than 1.8 L/m2 to achieve the respective dust removal efficiencies.  The dust levels would be monitored and managed under an EM&A programme as specified in the EM&A Manual;

ii)       For the unloading of spoil from trucks at barging point, installation of 3-sided screen with top cover and the provision of water sprays at the discharge point would be provided for an assumed 50% dust suppression.  This assumption is based upon USEPA AP-42 Control Techniques for Particulate Emissions form Stationary Sources Part 2 which states that watering alone would have 50% dust removal efficiency.  This is, however, considered very conservative as the barging point would also be provided with a 3-sided enclosure, which would provide additional dust containment and control which has not been allowed for in this assumption

In addition to the abovementioned, the Contractor is also obliged to follow the procedures and requirements given in the Air Pollution Control (Construction Dust) Regulation.  It stipulates the construction dust control requirements for both Notifiable (e.g. site formation) and Regulatory (e.g. road opening) Works to be carried out by the Contractor. 

In accordance with the Air Pollution Control (Construction Dust) Regulation, the following dust suppression measures should also be incorporated by the Contractor to control the dust nuisance throughout the construction phase:

·      Any excavated or stockpile of dusty material should be covered entirely by impervious sheeting or sprayed with water to maintain the entire surface wet and then removed or backfilled or reinstated where practicable within 24 hours of the excavation or unloading;

·      Any dusty materials remaining after a stockpile is removed should be wetted with water and cleared from the surface of roads;

·      A stockpile of dusty material should not be extend beyond the pedestrian barriers, fencing or traffic cones;

·      The load of dusty materials on a vehicle leaving a construction site should be covered entirely by impervious sheeting to ensure that the dusty materials do not leak from the vehicle;

·      Where practicable, vehicle washing facilities with high pressure water jet should be provided at every discernible or designated vehicle exit point.  The area where vehicle washing takes place and the road section between the washing facilities and the exit point should be paved with concrete, bituminous materials or hardcores;

·      When there are open excavation and reinstatement works, hoarding of not less than 2.4m high should be provided as far as practicable along the site boundary with provision for public crossing. Good site practice shall also be adopted by the Contractor to ensure the conditions of the hoardings are properly maintained throughout the construction period;

·      The portion of any road leading only to construction site that is within 30m of a vehicle entrance or exit should be kept clear of dusty materials;

·      Surfaces where any pneumatic or power-driven drilling, cutting, polishing or other mechanical breaking operation takes place should be sprayed with water or a dust suppression chemical continuously;

·      Any area that involves demolition activities should be sprayed with water or a dust suppression chemical immediately prior to, during and immediately after the activities so as to maintain the entire surface wet;

·      Where a scaffolding is erected around the perimeter of a building under construction, effective dust screens, sheeting or netting should be provided to enclose the scaffolding from the ground floor level of the building, or a canopy should be provided from the first floor level up to the highest level of the scaffolding;

·      Any skip hoist for material transport should be totally enclosed by impervious sheeting;

·      Every stock of more than 20 bags of cement or dry pulverised fuel ash (PFA) should be covered entirely by impervious sheeting or placed in an area sheltered on the top and the 3 sides;

·      Cement or dry PFA delivered in bulk should be stored in a closed silo fitted with an audible high level alarm which is interlocked with the material filling line and no overfilling is allowed;

·      Loading, unloading, transfer, handling or storage of bulk cement or dry PFA should be carried out in a totally enclosed system or facility, and any vent or exhaust should be fitted with an effective fabric filter or equivalent air pollution control system; and

·      Exposed earth should be properly treated by compaction, turfing, hydroseeding, vegetation planting or sealing with latex, vinyl, bitumen, shortcrete or other suitable surface stabiliser within six months after the last construction activity on the construction site or part of the construction site where the exposed earth lies.

For the barging facilities at Kai Tak Runway, the following good site practices are required:

·      All road surfaces within the barging facilities will be paved.

·      Dust enclosures will be provided for the loading ramp.

·      Vehicles will be required to pass through designated wheel wash facilities.

·      Continuous water spray at the loading point.

These requirements should be incorporated into the Contract Specification for the civil work.  In addition, an audit and monitoring programme during the construction phase should be implemented by the Contractor to ensure that the construction dust impacts are controlled to within the HKAQO.  Detailed requirements for the audit and monitoring programme are given separately in the EM&A manual.

7.6.7       Assessment Results - Mitigated Scenario

Short-term Assessment (Tier 1)

The maximum 1-hour and 24-hour TSP concentrations based on Tier 1 screening test have been assessed. The following Tables 7.11 – 7.12 summaries the cumulative 1-hour and 24-hour TSP impact (Tier 1) at identified ASRs in Tai Wai Area and Kowloon Area respectively. The results indicate that, for the majority of ASRs, exceedance of 1-hour and 24-hour TSP criteria are not anticipated even assuming the absolute worst case situation, whereby all the worksites would be active (i.e. 100%). However, for the ASRs at Hin Keng Estate – Hin Kwai House (TAW-6-6) and Hin Wan House (TAW-6-8), Hin Tin Swimming Pool (TAW-12-1), Football field inside Hin Ting Playground (TAW-13-1), Shek On Building (DIH-9-1), Basketball court in Sung Wong Toi Playground (TKW-4-1) and Residential Premises near Kai Tak Station (KAT-P1-5), exceedances of 1-hour and/or 24-hour TSP criteria are predicted. As the Tier 1 assessment is for screening purposes only and would not represent the actual on-site situation, a more focused Tier 2 assessment has been undertaken at the abovementioned ASRs.

In addition, contour of Tier 1 1-hour and 24-hour TSP concentrations are shown in the Figures 7.2.1 – 7.2.4. Contours indicate that there are no exceedances at other locations.

Table 7.11:     Tier 1 Assessment – Predicted Mitigated Cumulative 1-hour and 24-hour TSP Concentrations at Various Heights above Ground in the Tai Wai Area (Including Background Concentration of 65.4μg/m3)

ASR ID

Location

1-hour TSP Concentrations at Various Height(μg/m3)

24-hour TSP Concentrations at Various Height(μg/m3)

1.5m

5m

10m

15m

20m

1.5m

5m

10m

15m

20m

TAW-1-1

Carado Garden Block 6

135

135

123

108

94

76

76

75

74

73

TAW-2-1

Shatin Heights

197

190

155

129

113

91

89

82

76

72

TAW-3-1

K K Terrace

175

173

149

123

104

81

80

78

75

73

TAW-4-1

Woodcrest Hill Block 2&3

162

163

143

122

103

83

82

77

74

72

TAW-5-1

Chan’s Garden

174

170

141

115

101

94

90

80

74

71

TAW-5-2

L Louey

356

290

171

134

113

118

102

87

79

74

TAW-5-3

Joyville

218

204

156

115

105

105

95

83

75

72

TAW-6-1

Hin Keng Estate - Hin Yiu House

177

161

132

111

97

80

81

79

77

74

TAW-6-2

Carmel Alison Lam Primary School

176

162

137

111

95

79

79

78

76

74

TAW 6-3

Hin Keng Estate - Hin Tak House

192

171

139

108

96

81

80

78

76

73

TAW 6-4

Hin Keng Estate - Hin Yeung House

243

212

137

106

96

90

85

79

76

73

TAW 6-5

Hin Keng Estate - Hin Yau House

431

279

192

134

117

160

113

89

78

74

TAW 6-6

Hin Keng Estate - Hin Kwai House

554

230

151

120

102

178

105

81

77

74

TAW 6-7

C.U.H.K.A.A. Thomas Cheung School

472

291

153

118

102

104

91

78

75

72

TAW 6-8

Hin Keng Estate - Hin Wan House

553

259

180

133

111

205

116

87

78

73

TAW-7-1

Kam Cheong Building

105

108

104

100

94

71

72

72

71

71

TAW-8-1

Grandway Garden Block 2

107

110

105

100

95

72

73

72

72

71

TAW-9-1

Christian Alliance Cheng Wing Gee College

150

152

142

128

114

73

73

73

72

72

TAW-10-1

Holford Garden - Fook Siu Court

129

132

126

117

107

71

71

71

71

70

TAW-11-1

Man Lai Court Tower 1

96

99

97

94

90

70

71

70

70

70

TAW-12-1

Hin Tin Swimming Pool

567

369

217

151

126

167

117

92

82

76

TAW-13-1

Football field inside Hin Tin Playground

578

308

190

144

121

186

114

89

80

76

TAW-P1

Top Side Residential Development at Tai Wai Maintenance Centre

409

348

226

152

124

100

97

88

82

77

TAW-P2

Tai Wai Station Development

114

117

112

105

98

73

74

73

72

72

Note:

Exceedances are shown as bolded characters.

Table 7.12:     Tier 1 Assessment – Predicted Mitigated Cumulative 1-hour and 24-hour TSP Concentrations at Various Heights above Ground in the Kowloon Area (Including Background Concentration of 75.2μg/m3)

ASR ID

Location

1-hour TSP Concentrations at Various Height(μg/m3)

24-hour TSP Concentrations at Various Height(μg/m3)

1.5m

5m

10m

15m

20m

1.5m

5m

10m

15m

20m

DIH-1-1

Tsui Chuk Garden Block 5

237

211

169

158

150

121

117

103

94

91

DIH 2-1

Chuk Yuen North Estate – Pak Yuen House

165

171

165

157

149

95

96

94

91

89

DIH-3-1

Chuk Yuen South Estate – Wah Yuen House

217

204

173

161

153

107

104

99

94

91

DIH-3-2

Chuk Yuen South Estate – Nga Yuen House

222

213

181

163

153

101

101

97

93

91

DIH-3-3

Chuk Yuen South Estate – Kwai Yuen House

208

181

170

162

154

115

110

99

95

92

DIH-3-4

Chuk Yuen South Estate – Chui Yuen House

261

217

175

163

154

114

106

97

94

91

DIH-4-1

Pang Ching Court

177

170

165

158

150

95

97

95

92

89

DIH-4-2

Carbo Anglo-Chinese Kindergarten

289

213

158

152

145

120

113

96

92

90

DIH-5-1

Rainbow Home

183

185

175

166

156

107

104

100

96

92

DIH-5-2

Residential premises

196

197

177

168

157

105

107

103

98

93

DIH-5-5

Our Lady’s Kindergarten

187

178

172

164

154

100

101

98

95

91

DIH 6-1

Wong Tai Sin Fire Station and Quarters Block A

217

217

188

168

157

105

106

102

97

93

DIH-7-1

Tropicana Gardens Block 2

275

265

210

172

160

124

122

110

101

94

DIH-7-2

Tropicana Garden Block 3

257

251

205

171

159

117

117

107

100

94

DIH-8-1

Redemption Lutheran Church

338

309

221

174

161

162

155

127

106

97

DIH-9-1

Shek On Building

540

368

210

179

166

267

191

124

108

98

DIH-10-1

Hong Kong Sheung Keung Hui Nursing Home

434

307

195

180

166

202

166

122

108

99

DIH-11-1

Lung Poon Court – Lung Wan House

479

339

239

195

174

234

146

117

105

98

DIH-12-1

Galaxia Tower B

375

353

271

216

183

140

139

127

116

107

DIH-12-2

Galaxia Tower E

353

337

265

215

184

144

133

122

112

105

DIH-13-1

Canossa Primary School

410

330

208

178

164

202

176

128

109

99

DIH-14-1

Rhythm Garden Block 2

335

335

289

244

208

166

129

119

113

108

DIH-14-2

Rhythm Garden Block 5

482

437

335

264

211

133

131

120

111

105

DIH-14-3

Rhythm Garden Block 8

386

377

304

243

202

141

141

131

121

113

DIH-14-4

Canossa Primary School (San Po Kong)

268

276

253

224

195

138

130

114

111

107

DIH-14-5

Rhythm Garden Block 1

436

330

282

241

202

186

130

116

112

108

DIH-14-6

Rhythm Garden Block 3

352

358

310

260

216

150

125

120

114

108

DIH-15-1

Choi Hung Estate - Kam Wan House

329

339

299

255

214

105

107

104

101

98

DIH-15-2

Choi Hung Estate - Pik Hoi House

364

373

324

271

224

112

113

109

105

100

DIH-16-1

Wong Tai Sin Temple

242

180

173

165

155

112

108

103

98

93

DIH-17-1

Chuk Yuen United Village

193

195

176

167

157

112

113

106

99

93

DIH-18-1

Upper Wong Tai Sin Estate - Po Sin House

249

178

172

164

155

121

102

99

96

93

DIH-18-2

Upper Wong Tai Sin Estate - Tat Sin House

261

178

172

164

155

141

101

98

95

93

DIH-19-1

Lung Cheung Government Secondary School

224

190

167

159

151

98

100

99

96

94

DIH-20-1

Baptist Rainbow Primary School

277

183

163

156

149

147

121

96

93

91

DIH-21-1

Tin Wang Court - Wang King House

368

230

166

159

151

206

139

104

97

93

DIH-22-1

Price Memorial Catholic Primary School

299

185

168

161

153

134

110

100

96

93

DIH-23-1

Tin Ma Court - Chun On House

248

174

169

162

154

139

112

98

96

93

DIH-24-1

Shing Wong Temple

284

196

163

157

149

107

100

98

96

93

DIH-25-1

Football Field in Choi Hung Road Playground

237

219

201

185

169

129

120

108

102

96

DIH-26-1

Hammer Hill Road Leisure Pool

286

301

277

247

217

101

102

99

97

95

KAT-1-1

Kowloon Cognito College

313

305

248

198

169

150

148

129

113

101

TKW-1-1

Parc 22

489

385

286

213

170

205

177

140

121

110

TKW-1-2

Sanford Mansion

398

366

288

221

175

179

169

140

119

109

TKW-2-1

Skytower Tower 5

347

306

248

214

182

177

166

136

123

111

TKW-2-2

Skytower Tower 2

348

335

273

220

180

174

165

139

120

110

TKW-3-1

Prince Ritz

390

352

260

205

171

188

176

145

125

112

TKW-3-2

Prosperity House

411

384

294

223

177

202

191

159

133

116

TKW-4-1

Basketball Court in Sung Wong Toi Playground

528

405

272

203

165

289

216

154

128

113

TKW-5-1

Football Field in Argyle Street Playground

411

362

264

201

167

221

206

161

131

114

MTW-6-1

Fok On Building

463

430

321

240

187

150

145

127

118

109

MTW-6-2

Hong Kong Society for the Protection of Children

415

400

316

241

189

138

138

127

118

109

MTW-6-3

Chung Nam Mansion

368

357

287

222

177

142

140

126

113

104

MTW-6-4

Pok Oi Lau

364

359

298

238

191

130

129

119

110

104

MTW-7-1

Ma Tau Wai Estate - Geranium House

292

296

262

223

186

122

123

117

109

102

MTW-8-1

Horae Place

250

257

235

208

181

126

128

121

113

104

MTW-9-1

Majestic Park

239

247

228

205

180

118

120

114

108

102

MTW-10-1

18 Farm Road

232

226

204

186

169

121

121

115

109

103

MTW-11-1

Farm Road Government Primary School

219

224

208

190

172

115

117

113

107

102

MTW-12-1

Yuet Fai Mansion

192

199

187

173

158

115

118

114

109

104

MTW-12-2

Delight Court

273

193

183

171

157

112

115

112

108

103

MTW-12-3

Lucky Mansion

359

208

185

174

161

159

119

110

106

102

MTW-12-4

352-354 Ma Tau Wai Rd

363

197

186

175

162

166

116

109

105

101

MTW-12-5

Seng Cheong Building

425

214

178

168

157

191

128

110

104

101

MTW-12-6

Great Wall Building

217

223

204

186

168

122

124

118

111

104

MTW-12-7

197-199 Ma Tau Wai Rd

207

213

197

180

164

118

121

116

110

104

MTW-12-8

Pak Tai Mansion

193

195

185

172

157

115

118

114

109

104

MTW-12-9

Residential premises along Hung Kwong Street

244

199

185

172

158

114

117

113

109

103

MTW-12-10

Lucky Building

314

221

185

174

161

149

127

111

105

100

MTW-13-1

Cheung Chuk Shan Memorial School

382

201

187

174

160

149

115

112

107

103

MTW-14-1

Po Leung Kuk Lam Man Chan English Primary School

278

201

192

179

165

120

114

111

107

102

MTW-15-1

Hung Hom Lutheran Primary School

350

208

189

176

163

162

113

110

106

102

MTW-16-1

SKH Good Shepherd Primary School

429

199

189

177

164

186

113

110

106

102

MTW-17-1

Loyal Mansion

282

197

176

166

155

142

125

111

105

101

MTW-18-1

Residential premises along Chi Kiang Street

383

212

178

168

156

153

113

108

105

101

MTW-19-1

Holy Trinity Church

393

368

283

214

171

216

201

158

131

115

MTW-20-1

Football Field in Ma Tau Wai Road Playground

259

266

242

213

184

120

122

116

109

102

MTW-21-1

To Kwa Wan Market & Government Offices

364

199

188

177

164

180

118

109

105

101

MTW-22-1

Kowloon Animal Management Centre

343

319

262

217

179

174

169

144

127

114

HOM-1-1

Ko Shan Theatre

236

225

210

195

176

120

117

109

104

100

HOM-2-1

Faerie Court

355

229

189

171

156

160

124

113

106

101

HOM-2-2

Lee Wing Bldg

414

262

193

178

162

193

142

116

107

101

HOM-2-3

Wing Lam Mansion

313

268

204

191

173

142

134

116

107

101

HOM-2-4

Tak Lee Court

248

241

214

204

184

121

121

113

106

101

HOM-2-5

Chat Ma Mansion

232

210

182

167

154

134

123

113

106

101

HOM-3-1

Fook Sing Mansion

222

219

220

223

203

111

113

109

104

100

HOM-3-2

Marigold Mansion Block A

207

209

213

240

243

105

108

114

125

126

HOM-4-1

Yee Fu Building

199

197

211

260

308

106

108

112

129

146

HOM-5-1

271 Chatham Road North

237

211

216

288

352

119

120

123

147

169

HUH-1-1

Cartas Branchi College of Careers

341

240

200

281

302

164

144

125

148

157

HUH-1-2

Lok Ka House

407

240

225

308

319

191

139

125

146

151

HUH-1-3

Wing Fung Building

441

266

256

288

274

202

150

140

145

140

HUH-2-1

Hong Kong Polytechnic University - Cheung On Tak Lecture Theatre

324

297

242

204

178

162

154

134

120

111

HUH-3-1

Royal Peninsula Block 2

194

189

165

157

150

119

114

108

104

101

HUH-4-1

The Metropolis Residence Tower 2

225

218

184

154

148

120

118

111

104

99

HUH-5-1

Harbour Plaza Metropolis

214

243

231

157

143

113

114

108

102

97

HUH-6-1

HK Fire Services Headquarters Building

198

200

184

167

155

116

113

109

105

100

HUH-7-1

Hotel Nikko Hong Kong

187

184

172

159

148

107

109

105

102

98

HUH-9-1

Hong Kong Coliseum [3]

Note [3]

Note [3]

196

166

145

Note [3]

Note [3]

105

101

97

HUH-10-1

Harbourfront Horizon [3]

Note [3]

202

168

143

137

Note [3]

106

102

99

95

HUH-11-1

China Travel Cargo Logistic Centre

325

265

183

169

157

164

139

116

110

104

DIH-P1-1

Upper Wong Tai Sin Estate Phase 3

357

178

171

163

154

184

113

99

95

92

KAT-P1-1

Residential premises near Kai Tak Station

See Note [1] 

KAT-P1-2

Residential premises near Kai Tak Station

See Note [1] 

KAT-P1-3

Residential premises near Kai Tak Station

See Note [2] 

KAT-P1-4

Residential premises near Kai Tak Station

See Note [2] 

KAT-P1-5

Residential premises near Kai Tak Station [4]

Note [3]

542

349

248

193

Note [3]

175

139

120

108

KAT-P1-6

Residential premises near Kai Tak Station [4]

Note [3]

299

242

207

191

Note [3]

155

133

115

103

KAT-P1-7

Residential premises near Kai Tak Station

See Note [2] 

KAT-P2-1

Public Housing Development at ex-San Po Kong Flatted Factory

336

332

274

223

185

146

139

126

118

111

TKW-P1-1

Residential premises near To Kwa Wan Station

See Note [2] 

HOM-P2

Proposed Dormitory for HKPU

198

206

222

236

235

108

110

116

122

115

Notes:

Values which exceeded AQO are shown as bolded characters

 [1]  The population intake of this project would be after Year 2016 (Referenced from approved Kai Tak Development EIA Report), and hence there are no cumulative construction dust impact from the projects

[2]   The premises is located within the works site boundary, hence the population intake would be after the construction of the Project i.e. no impact from the Project

[3]   No air sensitive use is observed at such levels –

Hong Kong Coliseum (HUH-9-1):

Air sensitive use is on the podium of the HUH station, which is at least 10mAG. First assessment height is therefore considered at 10mAG.

Harbourfront Horizon (HUH-10-1):

The first floor of residential units is situated on the podium, which is at least 5m above ground. First assessment height is therefore considered at 5mAG.

Residential premises near Kai Tak Station (KAT-P1-5 / KAT-P1-6):

These residential premises are currently occupied for the construction of public rental housing, which would have a 5m height lift lobby on the ground floor. First assessment height is therefore considered at 5mAG

[4]   The assessment results are for indication only as there are no air sensitive uses when the Yau Lee CBP is in operation.

Short-term Assessment (Tier 2)

A more focused Tier 2 assessment has been conducted such that the projected actual 30% active works areas for the adjacent construction site is positioned closest to the potentially worst affected ASRs, while emission from all the other sites remain at 100% as per Tier 1. As mentioned in Section 7.6.3, the Tier 2 assessment is also very conservative and would over predict the dust emissions that would unlikely occur.

The maximum 1-hour and 24-hour TSP concentrations at the ASRs highlighted in Tier 1 have been assessed. The following Tables 7.13 – 7.14 summaries the cumulative 1-hour and 24-hour TSP impact (Tier 2) at these ASRs in Tai Wai Area and Kowloon Area respectively. Results show that, the cumulative 1-hour and 24-hour TSP concentrations would comply with the respective criteria and as such, adverse short-term construction dust impact is not anticipated.

Table 7.13:     Tier 2 Assessment – Predicted Mitigated Cumulative 1-hour and 24-hour TSP Concentrations at Various Heights above Ground in the Tai Wai Area (Including Background Concentration of 65.4μg/m3)

ASR ID

Location

1-hour TSP Concentrations at Various Height(μg/m3)

24-hour TSP Concentrations at Various Height(μg/m3)

1.5m

5m

10m

15m

20m

1.5m

5m

10m

15m

20m

TAW 6-6

Hin Keng Estate - Hin Kwai House

468

181

151

120

101

160

91

80

75

73

TAW 6-8

Hin Keng Estate - Hin Wan House

393

230

180

133

110

152

98

86

78

73

TAW-12-1

Hin Tin Swimming Pool

399

241

137

113

97

129

93

80

74

71

TAW-13-1

Football field inside Hin Tin Playground

471

162

119

105

92

169

89

89

74

71

Table 7.14:     Tier 2 Assessment – Predicted Mitigated Cumulative 1-hour and 24-hour TSP Concentrations at Various Heights above Ground in the Kowloon Area (Including Background Concentration of 75.2μg/m3)

ASR ID

Location

1-hour TSP Concentrations at Various Height(μg/m3)

24-hour TSP Concentrations at Various Height(μg/m3)

1.5m

5m

10m

15m

20m

1.5m

5m

10m

15m

20m

DIH-9-1

Shek On Building

454

250

193

179

166

222

148

109

98

92

TKW-4-1

Basketball Court in Sung Wong Toi Playground

492

328

217

180

155

259

185

135

119

108

KAT-P1-5

Residential premises near Kai Tak Station

Note [1]

360

212

168

147

Note [1]

151

118

104

97

Notes:

 [1]  No air sensitive use is observed at such levels –

Residential premises near Kai Tak Station (KAT-P1-5 / KAT-P1-6):

These residential premises are currently occupied for the construction of public rental housing, which would have a 5m height lift lobby on the ground floor. First assessment height is therefore considered at 5mAG

Long-term Assessment

The maximum predicted annual TSP concentrations at identified ASRs in the study area are given in Tables 7.15 – 7.16 for Kowloon Area and Tai Wai Area respectively.

Table 7.15:     Predicted Mitigated Cumulative Annual TSP Concentrations at Various Heights above Ground in the Tai Wai Area (Including Background Concentration of 65.4μg/m3)

ASR ID

Location

Annual TSP Concentrations at Various Height(μg/m3)

1.5m

5m

10m

15m

20m

TAW-1-1

Carado Garden Block 6

65.5

65.5

65.5

65.5

65.4

TAW-2-1

Shatin Heights

65.5

65.5

65.5

65.5

65.4

TAW-3-1

K K Terrace

65.5

65.5

65.5

65.5

65.4

TAW-4-1

Woodcrest Hill Block 2&3

65.6

65.6

65.5

65.5

65.5

TAW-5-1

Chan’s Garden

65.7

65.7

65.6

65.5

65.5

TAW-5-2

L Louey

66.4

66.2

65.8

65.7

65.6

TAW-5-3

Joyville

66.0

65.9

65.7

65.6

65.5

TAW-6-1

Hin Keng Estate - Hin Yiu House

65.5

65.5

65.5

65.5

65.5

TAW-6-2

Carmel Alison Lam Primary School

65.5

65.5

65.5

65.5

65.5

TAW 6-3

Hin Keng Estate - Hin Tak House

65.5

65.5

65.5

65.5

65.5

TAW 6-4

Hin Keng Estate - Hin Yeung House

65.7

65.7

65.6

65.5

65.5

TAW 6-5

Hin Keng Estate - Hin Yau House

66.7

66.2

65.8

65.7

65.6

TAW 6-6

Hin Keng Estate - Hin Kwai House

67.2

66.1

65.7

65.6

65.5

TAW 6-7

C.U.H.K.A.A. Thomas Cheung School

65.6

65.6

65.5

65.5

65.5

TAW 6-8

Hin Keng Estate - Hin Wan House

66.9

66.3

65.8

65.6

65.6

TAW-7-1

Kam Cheong Building

65.4

65.4

65.4

65.4

65.4

TAW-8-1

Grandway Garden Block 2

65.4

65.4

65.4

65.4

65.4

TAW-9-1

Christian Alliance Cheng Wing Gee College

65.4

65.5

65.4

65.4

65.4

TAW-10-1

Holford Garden - Fook Siu Court

65.4

65.4

65.4

65.4

65.4

TAW-11-1

Man Lai Court Tower 1

65.4

65.4

65.4

65.4

65.4

TAW-12-1

Hin Tin Swimming Pool

66.6

65.8

65.6

65.5

65.5

TAW-13-1

Football field inside Hin Tin Playground

67.6

66.3

65.8

65.6

65.5

TAW-P1

Top Side Residential Development at Tai Wai Maintenance Centre

65.6

65.6

65.6

65.5

65.5

TAW-P2

Tai Wai Station Development

65.4

65.4

65.4

65.4

65.4

Table 7.16:     Predicted Mitigated Cumulative Annual TSP Concentrations at Various Heights above Ground in the Kowloon Area (Including Background Concentration of 75.2μg/m3)

ASR ID

Location

Annual TSP Concentrations at Various Height(μg/m3)

1.5m

5m

10m

15m

20m

DIH-1-1

Tsui Chuk Garden Block 5

75.5

75.5

75.4

75.4

75.3

DIH 2-1

Chuk Yuen North Estate – Pak Yuen House

75.3

75.3

75.3

75.3

75.3

DIH-3-1

Chuk Yuen South Estate – Wah Yuen House

75.5

75.5

75.4

75.4

75.4

DIH-3-2

Chuk Yuen South Estate – Nga Yuen House

75.4

75.4

75.3

75.3

75.3

DIH-3-3

Chuk Yuen South Estate – Kwai Yuen House

75.7

75.7

75.5

75.4

75.4

DIH-3-4

Chuk Yuen South Estate – Chui Yuen House

75.4

75.4

75.4

75.4

75.3

DIH-4-1

Pang Ching Court

75.4

75.4

75.4

75.3

75.3

DIH-4-2

Carbo Anglo-Chinese Kindergarten

75.4

75.4

75.4

75.3

75.3

DIH-5-1

Rainbow Home

75.5

75.5

75.4

75.4

75.3

DIH-5-2

Residential premises

75.4

75.4

75.4

75.3

75.3

DIH-5-5

Our Lady’s Kindergarten

75.4

75.4

75.4

75.3

75.3

DIH 6-1

Wong Tai Sin Fire Station and Quarters Block A

75.4

75.4

75.4

75.4

75.3

DIH-7-1

Tropicana Gardens Block 2

75.5

75.5

75.5

75.4

75.4

DIH-7-2

Tropicana Garden Block 3

75.5

75.5

75.4

75.4

75.4

DIH-8-1

Redemption Lutheran Church

76.0

76.0

75.8

75.7

75.5

DIH-9-1

Shek On Building

77.8

77.0

76.2

75.8

75.6

DIH-10-1

Hong Kong Sheung Keung Hui Nursing Home

77.2

76.8

76.2

75.8

75.6

DIH-11-1

Lung Poon Court – Lung Wan House

77.7

76.1

75.6

75.4

75.4

DIH-12-1

Galaxia Tower B

75.7

75.7

75.5

75.4

75.4

DIH-12-2

Galaxia Tower E

75.7

75.6

75.5

75.4

75.3

DIH-13-1

Canossa Primary School

76.8

76.6

76.1

75.8

75.6

DIH-14-1

Rhythm Garden Block 2

76.7

75.7

75.5

75.4

75.4

DIH-14-2

Rhythm Garden Block 5

75.7

75.7

75.6

75.5

75.4

DIH-14-3

Rhythm Garden Block 8

75.9

75.8

75.7

75.5

75.5

DIH-14-4

Canossa Primary School (San Po Kong)

76.0

75.9

75.6

75.5

75.4

DIH-14-5

Rhythm Garden Block 1

76.9

75.8

75.5

75.4

75.4

DIH-14-6

Rhythm Garden Block 3

76.1

75.7

75.5

75.4

75.4

DIH-15-1

Choi Hung Estate - Kam Wan House

75.5

75.5

75.4

75.4

75.4

DIH-15-2

Choi Hung Estate - Pik Hoi House

75.5

75.5

75.4

75.4

75.4

DIH-16-1

Wong Tai Sin Temple

75.9

75.7

75.5

75.4

75.4

DIH-17-1

Chuk Yuen United Village

75.5

75.5

75.4

75.4

75.4

DIH-18-1

Upper Wong Tai Sin Estate - Po Sin House

75.9

75.7

75.5

75.4

75.4

DIH-18-2

Upper Wong Tai Sin Estate - Tat Sin House

76.2

75.6

75.5

75.4

75.4

DIH-19-1

Lung Cheung Government Secondary School

75.5

75.5

75.5

75.4

75.4

DIH-20-1

Baptist Rainbow Primary School

75.9

75.7

75.5

75.4

75.4

DIH-21-1

Tin Wang Court - Wang King House

77.1

76.3

75.7

75.5

75.4

DIH-22-1

Price Memorial Catholic Primary School

76.3

76.0

75.6

75.5

75.4

DIH-23-1

Tin Ma Court - Chun On House

76.1

75.9

75.6

75.4

75.4

DIH-24-1

Shing Wong Temple

75.7

75.6

75.5

75.4

75.4

DIH-25-1

Football Field in Choi Hung Road Playground

76.2

76.1

75.9

75.7

75.5

DIH-26-1

Hammer Hill Road Leisure Pool

75.4

75.4

75.4

75.4

75.4

KAT-1-1

Kowloon Cognito College

76.5

76.4

76.3

76.1

75.9

TKW-1-1

Parc 22

77.8

77.7

77.3

77.0

76.7

TKW-1-2

Sanford Mansion

77.5

77.5

77.2

76.9

76.7

TKW-2-1

Skytower Tower 5

77.8

77.9

77.5

77.1

76.8

TKW-2-2

Skytower Tower 2

77.6

77.7

77.3

77.0

76.7

TKW-3-1

Prince Ritz

77.9

77.9

77.6

77.2

76.9

TKW-3-2

Prosperity House

77.8

77.8

77.5

77.2

76.9

TKW-4-1

Basketball Court in Sung Wong Toi Playground

80.0

79.2

78.1

77.5

77.1

TKW-5-1

Football Field in Argyle Street Playground

78.8

78.6

77.9

77.4

77.0

MTW-6-1

Fok On Building

77.4

77.4

77.2

76.9

76.7

MTW-6-2

Hong Kong Society for the Protection of Children

77.3

77.4

77.1

76.9

76.7

MTW-6-3

Chung Nam Mansion

77.0

77.1

76.9

76.7

76.5

MTW-6-4

Pok Oi Lau

76.9

77.0

76.9

76.7

76.5

MTW-7-1

Ma Tau Wai Estate - Geranium House

76.6

76.7

76.6

76.5

76.3

MTW-8-1

Horae Place

76.6

76.7

76.6

76.5

76.3

MTW-9-1

Majestic Park

76.5

76.6

76.5

76.4

76.2

MTW-10-1

18 Farm Road

76.5

76.5

76.5

76.4

76.2

MTW-11-1

Farm Road Government Primary School

76.4

76.5

76.4

76.3

76.2

MTW-12-1

Yuet Fai Mansion

76.4

76.5

76.4

76.3

76.2

MTW-12-2

Delight Court

76.4

76.4

76.3

76.2

76.1

MTW-12-3

Lucky Mansion

77.1

76.5

76.3

76.1

76.0

MTW-12-4

352-354 Ma Tau Wai Rd

77.6

76.6

76.2

76.1

76.0

MTW-12-5

Seng Cheong Building

77.5

76.6

76.2

76.0

75.9

MTW-12-6

Great Wall Building

76.6

76.6

76.5

76.4

76.3

MTW-12-7

197-199 Ma Tau Wai Rd

76.5

76.6

76.5

76.4

76.3

MTW-12-8

Pak Tai Mansion

76.4

76.5

76.4

76.3

76.2

MTW-12-9

Residential premises along Hung Kwong Street

76.4

76.5

76.4

76.3

76.2

MTW-12-10

Lucky Building

77.0

76.4

76.1

76.0

75.9

MTW-13-1

Cheung Chuk Shan Memorial School

76.6

76.4

76.3

76.2

76.1

MTW-14-1

Po Leung Kuk Lam Man Chan English Primary School

76.5

76.5

76.3

76.2

76.1

MTW-15-1

Hung Hom Lutheran Primary School

76.9

76.4

76.3

76.2

76.1

MTW-16-1

SKH Good Shepherd Primary School

77.1

76.5

76.3

76.2

76.1

MTW-17-1

Loyal Mansion

77.1

76.6

76.2

76.0

75.9

MTW-18-1

Residential premises along Chi Kiang Street

76.5

76.3

76.1

76.0

75.9

MTW-19-1

Holy Trinity Church

78.4

78.3

77.8

77.3

76.9

MTW-20-1

Football Field in Ma Tau Wai Road Playground

76.5

76.6

76.5

76.4

76.3

MTW-21-1

To Kwa Wan Market & Government Offices

77.2

76.4

76.2

76.1

76.0

MTW-22-1

Kowloon Animal Management Centre

79.3

79.2

78.5

77.8

77.3

HOM-1-1

Ko Shan Theatre

76.3

76.2

76.0

75.9

75.8

HOM-2-1

Faerie Court

77.0

76.3

76.1

75.9

75.8

HOM-2-2

Lee Wing Bldg

76.5

76.2

76.0

75.9

75.8

HOM-2-3

Wing Lam Mansion

76.1

76.1

76.0

75.9

75.8

HOM-2-4

Tak Lee Court

76.0

76.0

76.0

75.9

75.8

HOM-2-5

Chat Ma Mansion

76.5

76.3

76.1

76.0

75.9

HOM-3-1

Fook Sing Mansion

76.0

76.1

76.1

76.0

75.9

HOM-3-2

Marigold Mansion Block A

76.0

76.1

76.1

76.2

76.1

HOM-4-1

Yee Fu Building

76.0

76.1

76.2

76.3

76.3

HOM-5-1

271 Chatham Road North

76.3

76.3

76.5

76.8

76.7

HUH-1-1

Cartas Branchi College of Careers [2]

76.5

76.5

76.4

76.4

76.4

HUH-1-2

Lok Ka House

76.8

76.4

76.2

76.2

76.1

HUH-1-3

Wing Fung Building

77.1

76.4

76.1

76.0

75.9

HUH-2-1

Hong Kong Polytechnic University - Cheung On Tak Lecture Theatre

76.9

76.6

76.1

75.8

75.7

HUH-3-1

Royal Peninsula Block 2

76.0

76.0

75.8

75.7

75.7

HUH-4-1

The Metropolis Residence Tower 2

75.8

75.8

75.7

75.7

75.6

HUH-5-1

Harbour Plaza Metropolis

76.7

76.5

76.2

76.0

75.8

HUH-6-1

HK Fire Services Headquarters Building

78.1

78.0

77.6

77.1

76.6

HUH-7-1

Hotel Nikko Hong Kong

77.3

77.3

76.9

76.6

76.2

HUH-9-1

Hong Kong Coliseum

Note [3]

Note [3]

76.0

75.8

75.7

HUH-10-1

Harbourfront Horizon

Note [3]

78.0

76.8

76.2

75.9

HUH-11-1

China Travel Cargo Logistic Centre

76.5

76.2

75.9

75.7

75.7

DIH-P1-1

Upper Wong Tai Sin Estate Phase 3

76.9

75.9

75.5

75.4

75.4

KAT-P1-1

Residential premises near Kai Tak Station

See Note [1] 

KAT-P1-2

Residential premises near Kai Tak Station

See Note [1] 

KAT-P1-3

Residential premises near Kai Tak Station

See Note [2] 

KAT-P1-4

Residential premises near Kai Tak Station

See Note [2] 

KAT-P1-5

Residential premises near Kai Tak Station [4]

Note [3]

76.6

76.0

75.8

75.6

KAT-P1-6

Residential premises near Kai Tak Station [4]

Note [3]

78.6

78.6

78.6

78.2

KAT-P1-7

Residential premises near Kai Tak Station

See Note [2] 

KAT-P2-1

Public Housing Development at ex-San Po Kong Flatted Factory

76.3

76.2

75.9

75.7

75.6

TKW-P1-1

Residential premises near To Kwa Wan Station

See Note [2] 

HOM-P2

Proposed Dormitory for HKPU

76.0

76.0

76.1

76.2

76.0

Notes:

[1]   The population intake of this project would be after Year 2016 (Referenced from approved Kai Tak Development EIA Report), and hence there are no cumulative construction dust impact from the projects

[2]   The premises is located within the works site boundary, hence the population intake would be after the construction of the Project i.e. no impact from the Project

[3]   No air sensitive use is observed at such levels –

Hong Kong Coliseum (HUH-9-1):

Air sensitive use is on the podium of the HUH station, which is at least 10mAG. First assessment height is therefore considered at 10mAG.

Harbourfront Horizon (HUH-10-1):

The first floor of residential units is situated on the podium, which is at least 5m above ground. First assessment height is therefore considered at 5mAG.

Residential premises near Kai Tak Station (KAT-P1-5 / KAT-P1-6):

These residential premises are currently occupied for the construction of public rental housing, which would have a 5m height lift lobby on the ground floor. First assessment height is therefore considered at 5mAG

[4]   The assessment results are for indication only as there are no air sensitive uses when the Yau Lee CBP is in operation.

Evaluation of Construction Dust Impact

i)        Construction Works in the Tai Wai Area

According to Tables 7.11 and 7.15, all the predicted concentrations of 1-hour (Tier 1), 24-hour (Tier 1), and annual TSP at all identified ASRs would comply with the relevant criteria, except the exceedances of 1-hour and/or 24-hour TSP at Hin Keng Estate – Hin Kwai House (TAW-6-6) and Hin Wan House (TAW-6-8), Hin Tin Swimming Pool (TAW-12-1), and Football field inside Hin Ting Playground (TAW-13-1) under an absolute worst scenario. Subsequent Tier 2 focused test has therefore been conducted and it is shown in Table 7.13 that there is no exceedance predicted.

Contours have been plotted for 1-hour (Tier 2), and 24-hour (Tier 2) TSP concentrations at 1.5m above ground near the Hin Keng Estate and Hin Tin Playground to illustrate the short-term dust impact during construction stage, as presented in Figures 7.2.5 – 7.2.8 respectively. Contours of annual TSP concentrations at 1.5m above ground have also been plotted in Figure 7.2.9. Results indicate full compliances of the relevant criteria predicted at all area adjacent to the work sites. Hence, adverse construction dust impact is not anticipated in the Tai Wai Area.

ii)      At-Grade Construction Works in the Kowloon Area

As shown in Tables 7.12 and 7.16, the predicted cumulative 1-hour (Tier 1), 24-hour (Tier 1) and annual TSP concentrations at all the identified ASRs would comply with the relevant criteria, except the exceedance of 1-hour TSP at Shek On Building (DIH-9-1), 1-hour/24-hour/annual TSP at Basketball court in Sung Wong Toi Playground (TKW-4-1) and 1-hour TSP at Residential Premises near Kai Tak Station (KAT-P1-5).

Subsequent Tier 2 focused test has therefore been conducted and it is shown in Table 7.14 that there is no exceedance of 1-hour and 24-hour TSP predicted. Contours have been plotted for 1-hour (Tier 2), and 24-hour (Tier 2) TSP concentrations at 1.5m and/or 5m above ground near the DIH, TKW and KAT Stations to illustrate the short-term dust impact on these hot spot areas at the worst affected level(s) of ASRs, as presented in Figures 7.2.10 – 7.2.17 respectively. It is indicated in these figures that there are no air sensitive uses located within the area of exceedance, and hence adverse short-term dust impact is not anticipated in the identified hot spot areas.

Contours of annual TSP concentrations at 1.5m above ground have also been plotted in Figure 7.2.18 for the Kowloon area. Results indicate full compliances of the relevant criteria predicted at all area adjacent to the work sites, except the annual TSP at the the EMSD workshops near the Kowloon AMC.

The existing EMSD workshop next to the Kowloon AMC is vacant, based on the site visit conducted in January 2011. Although some exceedance is identified at the area of EMSD workshop adjacent to the seawall, this area is occupied as storage room and parking areas under shed only. As no people should be staying there under normal circumstances, the concerned storage area and parking areas are not considered as air sensitive receivers according to Annex 12 of the EIAO-TM and therefore no adverse short-term and long-term construction dust impacts are anticipated.

iii)     Barging Facility and Potential New Concrete Batching Plant in ex-Kai Tak Airport Area

Elevated emission sources (i.e. the potential new concrete batching plant) and various dust sources associated with the committed Kai Tai Development in the ex-Kai Tak airport area would have cumulative dust impact with the SCL (TAW-HUH) at different elevations of ASRs. The worst affected height is identified to be at 5m and 10m above ground based on the results presented in Tables 7.12 and 7.16. As such, contours of annual TSP at 5m and 10m are also plotted in Figures 7.2.19 – 7.2.20 for the ex-Kai Tak Airport area to illustrate the impact due to these elevated dust sources. Exceedances of annual TSP are observed at Residential Premises near Kai Tak Station (KAT-P1-5 and KAT-P1-6). However, it should be noted that the exceedances at such elevations are due to the operation of Yau Lee CBP, which is designated for the construction of public housing at the same locations. Hence, once the public housing developments have completed, the operation of Yau Lee CBP would then be ceased. Exceedances of annual TSP after the population intake are therefore not anticipated.  Figures 7.2.21 – 7.2.23 illustrate the cumulative annual TSP concentrations at 1.5, 5m and 10m above ground without the contributions from Yau Lee CBP. It is shown that there are no exceedances of annual TSP at Residential Premises near Kai Tak Station (KAT-P1-5 and KAT-P1-6) when the Yau Lee CBP has ceased its operation.

For the barging facility at Kai Tak Runway, adverse dust impact is not anticipated as there are no ASRs located within 500m from the barging facility.

iv)     Other Supporting Works in the Hung Hom Area – Freight Pier Barging Facility

Cumulative construction dust impacts arisen from the Projects (i.e. SCL (TAW-HUH), SCL (MKK-HUH), SCL (HUH-ADM) and KTE) in the Hung Hom Area, in particular, area adjacent to Freight Pier, are of major concern as dusty activities, including construction of tracks, tunnel openings, and the barging facility at Freight Pier, will be carried out under different Projects in this area. Notwithstanding numbers of construction activities, sufficient mitigation measures will be provided to minimise dust impacts on nearby ASRs. As shown in Tables 7.12 and 7.16, the predicted cumulative 1-hour (Tier 1), 24-hour (Tier 1) and annual TSP concentrations at all the identified ASRs would be well within their respective criteria, particularly the short-term TSP concentrations.  Contours of annual TSP concentrations at 5m and 10m above ground are illustrated in Figures 7.2.24 – 7.2.25. It is shown in the figures that, no air sensitive uses are identified in the area of exceedance. Adverse dust impact is therefore not anticipated.

7.6.8       Residual Impacts for Fugitive Dust

With the implementation of the mitigation measures as stipulated in the Air Pollution Control (Construction Dust) Regulation, dust control measures and good site practices, the predicted 1-hour and 24-hour TSP concentrations on area in the vicinity of the construction sites in Tai Wai area and Kowloon area would comply with the relevant criteria of 500 μg/m3 and 260 μg/m3 respectively. For annual TSP concentrations, residual dust impact is expected the EMSD workshops. However, there is no air sensitive use identified in the area of exceedance. As such, adverse residual dust impact is not anticipated.

7.6.9       Cumulative Impacts at HOM and HUH

As discussed in Section 1.2, the EIA Study Brief has included HOM and HUH.  However, during the design development, it is considered that the HOM be better implemented by the KTE and HUH by the SCL Cross Harbour Section (i.e. SCL (MKK-HUH)).  It should be noted that the assessment results presented in Tables 7.12 and 7.16, and also the contours (see Figures 7.2.3, 7.2.4, 7.2.18, 7.2.21 and 7.2.22), have included the emission sources from KTE, SCL (MKK-HUH) and all other concurrent projects.  Hence, the cumulative impacts due to HOM and HUH have been assessed.  In addition, in assessing the project contribution of the annual TSP, contributions from SCL (TAW-HUH), SCL (MKK-HUH) and KTE have also been included. In other words, cumulative impacts from these 2 stations have all been included.

An air quality impact assessment has been conducted for construction of SCL (TAW-HUH). The fugitive dust assessment for the construction has concluded that watering in all works areas once per 1-1.5 hours during working hours (7:00am – 7:00pm) would be required to control the fugitive dust impact.

Potential dust impact would be generated from the soil excavation activities, backfilling, site erosion, storage of spoil on site, and transportation of soil during the construction phase. Quantitative fugitive dust assessments have been conducted.

The results show that, in general, the predicted 1-hour and 24-hour and annual TSP concentrations at identified ASRs would comply with the respective criteria. Hence, it is concluded that there will not be any adverse residual air quality impacts.