During operational phase, vehicular emission from the associated road traffic and the odour emission of sewerage treatment works have been investigated. The predicted air quality impacts due to vehicular emission and chimney emissions are well within acceptable levels when comparing to the prevailing Air Quality Objectives (AQO).
Odour levels of the proposed SWHSTW expansion in FLN, which will be equipped with an odour removal system, are predicted at the identified air sensitive receivers (ASRs) to be in compliance with the odour criterion. Adverse odour impacts due to the project are not anticipated.
The air quality impact assessment has been conducted in accordance with the requirements of Annexes 4 and 12 of the TM-EIAO as well as the requirements set out under Clause of the EIA Study Brief.
The relevant legislations, standards and guidelines applicable to the present study for the assessment of air quality impacts are:
· Air Pollution Control Ordinance (APCO) (Cap 311);
· Air Pollution Control (Construction Dust) Regulation:
· Environmental Impact Assessment Ordinance (EIAO) (Cap. 499), Technical Memorandum on Environmental Impact Assessment Process (TM-EIAO), Annex 4 and Annex 12; and
· Practice Note on Control of Air Pollution in Vehicle Tunnels.
3.2.1 Air Quality Objectives
The principal legislation for controlling air pollutants is the APCO and its subsidiary regulations, which define statutory Air Quality Objective (AQOs) for 7 common air pollutants. The AQOs for these air pollutants are tabulated in Table 3.1 below.
Table 3.1 – Hong Kong Air Quality Objectives
|
Pollutant |
Concentration in micrograms per cubic
metre [1] (Parts per million, ppm in brackets) |
||||
|
1 Hour [2] |
8 Hours [3] |
24 Hours [3] |
3 Months [4] |
1 Year [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 Technical Memorandum on Environmental Impact
Assessment Process.
3.2.2 Air Pollution Control (Construction Dust) Regulation
The Air Pollution Control (Construction Dust) Regulation identifies works that require special dust control. Works relevant to this Project are the site formation and infrastructure elements, for which Total Suspended Particulates (TSP) concentration shall not exceed the respective criterion in Table 3.1.
3.2.3
Odour
Criteria
In accordance with Annex 4 of TM-EIAO, the limit of 5 odour units based on an averaging time of 5 seconds for odour prediction assessment should not be exceeded at any sensitive receivers.
3.3.1 Assessment Area
With reference to the EIA Study Brief, the assessment area for air quality impact assessment should generally be defined by a distance of 500 metres expanded from the boundary of the NDAs and associated infrastructure works. Figures 2.1 and Figures 2.2 show the proposed landuse for each NDA, associated works, and 500m assessment boundary. The assessment includes existing and planned sensitive receivers in the assessment area. Potential sources of impact within the assessment area are identified, where appropriate.
3.3.2 Baseline Condition
There is no EPD baseline air quality monitoring station (AQMS) within the Study Area. According to Appendix B-2 Section 3.2 of the EIA Study Brief for this project, the district of Shatin, Tai Po, Junk Bay, Hong Kong South and Yuen Long are Rural/New Development areas. The mean of the annual average concentrations monitored at these 5 districts could therefore be adopted to represent the baseline concentrations for the current study area. However, there is no monitoring station in Hong Kong South and Tseung Kwan O. Air quality monitoring data is not available for the two AQMS. The latest 5 published years of available air quality monitoring data, i.e. 2007 to 2011 are tabulated in Table 3.2 below:
Table 3.2 –
Air quality monitoring data in Year 2007-2011
|
Pollutant |
Station |
Annual Concentration
(μg/m3) |
|||||
|
2007 |
2008 |
2009 |
2010 |
2011 |
5-year Mean |
||
|
NO2 |
Shatin |
45 |
44 |
40 |
42 |
45 |
48.5 |
|
Tai Po |
53 |
52 |
45 |
46 |
45 |
||
|
Yuen Long |
55 |
56 |
52 |
54 |
54 |
||
|
RSP |
Shatin |
52 |
50 |
45 |
45 |
47 |
50.5 |
|
Tai Po |
53 |
50 |
46 |
45 |
46 |
||
|
Yuen Long |
64 |
60 |
51 |
49 |
54 |
||
|
TSP |
Shatin |
73 |
66 |
60 |
67 |
66 |
73.1 |
|
Tai Po |
73 |
73 |
60 |
64 |
69 |
||
|
Yuen Long |
97 |
87 |
77 |
78 |
86 |
||
|
SO2 |
Shatin |
19 |
17 |
11 |
12 |
14 |
14.3 |
|
Tai Po |
16 |
17 |
9 |
8 |
8 |
||
|
Yuen Long |
24 |
21 |
14 |
11 |
13 |
||
Notes:
[1] Air
quality data not available.
In view of the air quality data between 2007 and 2011, the annual averaged concentrations of air pollutants (e.g. NO2, RSP) showed a gradual decreasing trend. The 5-year mean of annual average concentrations at Shatin, Tai Po, Tseung Kwan O, Hong Kong South and Yuen Long Monitoring Stations in 2007 – 2011 have been taken as the baseline air quality data.
The representative air sensitive receivers (ASRs) within 500m from the boundary of NDAs and associated road network have been identified. These include any domestic premises, hotel, 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. Existing ASRs outside the site boundary mainly comprise village houses and residential developments.
The existing and planned ASRs outside the NDA boundary were identified from topographic maps, aerial photos, land status plans and site surveys. Planned ASRs within the NDA boundary were identified by making reference to the Recommended Outline Development Plans (RODP) mentioned in Section 2.3, Population Intake Programme and Implementation Programme.
Since the population intake would proceed in phases, certain land-lots of existing ASRs inside the NDAs would be resumed for development and some of the planned ASRs would exist before the Project development is fully completed. Therefore, consideration of the phased development over time has been taken to identify ASRs, representative of the different implementation stages of the Project.
The locations of representative existing ASRs within the 500m assessment area of KTN and FLN NDAs and are shown in Figure 3.1 and Figure 3.2, and tabulated in Table 3.3 and Table 3.4 respectively.
Locations of representative planned ASRs
within the 500m assessment area of KTN and FLN NDAs have been identified and
are shown in Figure 3.3 and
Figure 3.4 and tabulated in Table 3.5 and Table 3.6
respectively. Details of the future land lots of the Revised RODP (including
land uses, building heights) are shown in Appendix
2.1.
Table 3.3 – Representative existing ASRs
within the 500m assessment area and in the vicinity of KTN NDA
|
Description |
ASRID |
Landuse |
Building
Height Above Ground (approx.) (m) |
Separation
Distance between ASR and Site Boundary (approx.) (m) |
Assessment
Year
[1] |
|
Dills
Corner Garden |
KTN-E1 |
R |
6 |
within the KTN NDA |
2018 |
|
KTN-E3 |
R |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E4 |
R |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E5 |
R |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E6 |
R |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E7 |
R |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E8 |
R |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E9 |
R |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E10 |
R |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E11 |
R |
6 |
within the KTN NDA |
2018 |
|
|
Kwu Tung Playground |
KTN-E15 |
RC |
1.5 |
within the KTN NDA |
2024 |
|
Oil
Wah School |
KTN-E18 |
E |
12 |
within the KTN NDA |
2024 |
|
Home
of Loving Faithfulness |
KTN-E19 |
H |
9 |
within the KTN NDA |
2024 |
|
Temporary
Structure near Han Clan Grave |
KTN-E20 |
OU |
3 |
within the KTN NDA |
2024 |
|
KTN-E21 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E22 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
Temporary Structure near Sheung
Yue River |
KTN-E24 |
OU |
3 |
within the KTN NDA |
2025 |
|
KTN-E25 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E26 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E27 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
Temporary Structure near Shek
Tsai Leng |
KTN-E28 |
OU |
3 |
within the KTN NDA |
2024 |
|
KTN-E30 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
Shek Tsai Leng Factory |
KTN-E31 |
I |
3 |
within the KTN NDA |
2024 |
|
KTN-E32 |
I |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E33 |
I |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E34 |
I |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E35 |
I |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E36 |
I |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E37 |
I |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E38 |
I |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E39 |
I |
3 |
within the KTN NDA |
2024 |
|
|
Temporary
Structure at Fung Kong |
KTN-E40 |
R |
3 |
within the KTN NDA |
2024 |
|
KTN-E41 |
R |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E42 |
R |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E43 |
R |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E44 |
R |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E45 |
R |
3 |
within the KTN NDA |
2024 |
|
|
Shek Tsai Leng Factory |
KTN-E46 |
I |
3 |
within the KTN NDA |
2024 |
|
Factory
near Ho Sheung Heung Road |
KTN-E47 |
I |
3 |
within the KTN NDA |
2024 |
|
KTN-E48 |
I |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E49 |
I |
3 |
within the KTN NDA |
2024 |
|
|
Village Houses between Tung Kok
and Tung Fong |
KTN-E50 |
R |
6 |
within the KTN NDA |
2024 |
|
KTN-E52 |
R |
6 |
within the KTN NDA |
2024 |
|
|
KTN-E53 |
R |
6 |
within the KTN NDA |
2024 |
|
|
KTN-E54 |
R |
6 |
within the KTN NDA |
2024 |
|
|
Temporary
Structure at Tung Fong |
KTN-E55 |
OU |
6 |
within the KTN NDA |
2018 |
|
KTN-E56 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E57 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E58 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E59 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
Temporary Structure at Pak Shek
Au |
KTN-E60 |
OU |
6 |
within the KTN NDA |
2018 |
|
KTN-E61 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E62 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E63 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E64 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E65 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E67 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E68 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E69 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E70 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E71 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E72 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E73 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E78 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
KTN-E79 |
OU |
6 |
within the KTN NDA |
2018 |
|
|
Temporary Structure Western to
Yin Kong Tsuen |
KTN-E80 |
OU |
3 |
within the KTN NDA |
2024 |
|
KTN-E81 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E82 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E83 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E84 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
Yin Kong Tsuen |
KTN-E85 |
R |
9 |
within the KTN NDA |
2044 |
|
KTN-E86 |
R |
9 |
within the KTN NDA |
2044 |
|
|
KTN-E87 |
R |
9 |
within the KTN NDA |
2044 |
|
|
Sports Ground near Enchi Lodge |
KTN-E88 |
RC |
1.5 |
within the KTN NDA |
2044 |
|
Temporary
Structure near Castle Peak Road |
KTN-E89 |
OU |
3 |
within the KTN NDA |
2044 |
|
KTN-E90 |
OU |
3 |
within the KTN NDA |
2044 |
|
|
KTN-E91 |
OU |
3 |
within the KTN NDA |
2044 |
|
|
Temporary Structure Southern to
Ho Sheung Heung Village |
KTN-E92 |
OU |
3 |
within the KTN NDA |
2022 |
|
KTN-E93 |
OU |
3 |
within the KTN NDA |
2022 |
|
|
Ho Sheung Heung Temple |
KTN-E94 |
W |
3 |
within the KTN NDA |
2044 |
|
Ho
Sheung Heung Village |
KTN-E97 |
R |
9 |
within the KTN NDA |
2044 |
|
KTN-E99 |
R |
9 |
within the KTN NDA |
2044 |
|
|
KTN-E100 |
R |
9 |
within the KTN NDA |
2044 |
|
|
KTN-E101 |
R |
9 |
within the KTN NDA |
2044 |
|
|
Temporary Structure Northern to
Ho Sheung Heung Village |
KTN-E102 |
OU |
3 |
within the KTN NDA |
2044 |
|
Village Houses near Tsung
Yuen |
KTN-E104 |
R |
9 |
within the KTN NDA |
2044 |
|
KTN-E106 |
R |
9 |
within the KTN NDA |
2044 |
|
|
KTN-E108 |
R |
9 |
within the KTN NDA |
2044 |
|
|
Temporary Structure at Tsung
Yuen |
KTN-E109 |
R |
3 |
within the KTN NDA |
2044 |
|
Temporary
Structure near Lo Wu Correctional Institution |
KTN-E110 |
OU |
3 |
within the KTN NDA |
2044 |
|
Lo Wu
Correctional Institution Basketball Court |
KTN-E111 |
RC |
1.5 |
within the KTN NDA |
2044 |
|
Lo Wu
Correctional Institution |
KTN-E112 |
IC |
3 |
within the KTN NDA |
2044 |
|
Temporary
Structure near Phoenix Garden |
KTN-E113 |
OU |
3 |
within the KTN NDA |
2024 |
|
Temporary
Structure along Fung Kong Shan |
KTN-E114 |
OU |
3 |
within the KTN NDA |
2024 |
|
KTN-E115 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E116 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E117 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E118 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E119 |
OU |
3 |
within the KTN NDA |
2019 |
|
|
KTN-E120 |
OU |
3 |
within the KTN NDA |
2019 |
|
|
Lo Wu Firing Range (Eastern) |
KTN-E123 |
IC |
1.5 |
within the KTN NDA |
2044 |
|
Temporary
Structure at Ma Tso Lung (Eastern) |
KTN-E124 |
R |
3 |
within the KTN NDA |
2024 |
|
KTN-E125 |
R |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E126 |
R |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E127 |
R |
3 |
within the KTN NDA |
2024 |
|
|
Lo Wu Firing Range (Western) |
KTN-E128 |
IC |
1.5 |
within the KTN NDA |
2044 |
|
Temporary
Structure at Ma Tso Lung (Western) |
KTN-E129 |
OU |
3 |
within the KTN NDA |
2024 |
|
KTN-E130 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E131 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
Temporary Structure near Lo Wu
Firing Range |
KTN-E133 |
OU |
3 |
within the KTN NDA |
2024 |
|
KTN-E134 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E135 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
Giant Soccer Academy |
KTN-E136 |
IC |
1.5 |
within the KTN NDA |
2017 |
|
Temporary
Structure near Fung Kong Shan |
KTN-E137 |
OU |
3 |
within the KTN NDA |
2024 |
|
KTN-E138 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E139 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E140 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
Temporary Structure near Giant
Soccer Academy |
KTN-E141 |
OU |
3 |
within the KTN NDA |
2024 |
|
Temporary
Structure near Community Sports |
KTN-E142 |
OU |
3 |
within the KTN NDA |
2024 |
|
Temporary
Structure near Fung Kong |
KTN-E143 |
OU |
3 |
within the KTN NDA |
2024 |
|
KTN-E145 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
Open Storage near Fung Kong |
KTN-E146 |
OS |
1.5 |
within the KTN NDA |
2018 |
|
Temporary
Structure near Fung Kong |
KTN-E148 |
OS |
3 |
within the KTN NDA |
2018 |
|
Temporary
Structure near Ma Tso Lung Road |
KTN-E149 |
R |
3 |
within the KTN NDA |
2018 |
|
KTN-E150 |
R |
3 |
within the KTN NDA |
2018 |
|
|
KTN-E151 |
R |
3 |
within the KTN NDA |
2018 |
|
|
Temporary Structure near Fung
Kong |
KTN-E152 |
R |
3 |
within the KTN NDA |
2024 |
|
Ho
Sheung Heung Village |
KTN-E154 |
R |
9 |
within the KTN NDA |
2044 |
|
KTN-E155 |
R |
9 |
within the KTN NDA |
2044 |
|
|
KTN-E156 |
R |
9 |
within the KTN NDA |
2044 |
|
|
Temporary
Structure near Dills Corner Garden |
KTN-E157 |
OU |
3 |
within the KTN NDA |
2018 |
|
KTN-E158 |
OU |
3 |
within the KTN NDA |
2018 |
|
|
KTN-E159 |
OU |
3 |
within the KTN NDA |
2018 |
|
|
Kwu Tung Grass Soccer Pitch |
KTN-E160 |
RC |
1.5 |
within the KTN NDA |
2024 |
|
KTN-E161 |
RC |
1.5 |
within the KTN NDA |
2024 |
|
|
Temporary Structure near
Fanling Highway (near Pak Shek Au) |
KTN-E162 |
OU |
3 |
within the KTN NDA |
2044 |
|
KTN-E163 |
OU |
3 |
within the KTN NDA |
2044 |
|
|
KTN-E164 |
OU |
3 |
within the KTN NDA |
2044 |
|
|
Temporary Structure at Pak Shek
Au |
KTN-E165 |
OU |
3 |
within the KTN NDA |
2018 |
|
KTN-E166 |
OU |
3 |
within the KTN NDA |
2018 |
|
|
KTN-E167 |
OU |
3 |
within the KTN NDA |
2018 |
|
|
KTN-E168 |
OU |
3 |
within the KTN NDA |
2018 |
|
|
KTN-E169 |
OU |
3 |
within the KTN NDA |
2018 |
|
|
KTN-E170 |
OU |
3 |
within the KTN NDA |
2025 |
|
|
KTN-E171 |
OU |
3 |
within the KTN NDA |
2025 |
|
|
KTN-E172 |
OU |
3 |
within the KTN NDA |
2025 |
|
|
KTN-E173 |
OU |
3 |
within the KTN NDA |
2025 |
|
|
KTN-E174 |
OU |
3 |
within the KTN NDA |
2025 |
|
|
KTN-E175 |
OU |
3 |
within the KTN NDA |
2025 |
|
|
KTN-E176 |
OU |
3 |
within the KTN NDA |
2018 |
|
|
Temporary Structure near Shek
Tsai Leng |
KTN-E177 |
OU |
3 |
within the KTN NDA |
2024 |
|
KTN-E178 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E179 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E180 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E181 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
Pui Yau Kindergarten |
KTN-E182 |
E |
9 |
within the KTN NDA |
2024 |
|
Temporary
Structure near Tung Fong |
KTN-E183 |
R |
3 |
within the KTN NDA |
2024 |
|
KTN-E184 |
R |
3 |
within the KTN NDA |
2024 |
|
|
Village Houses between Tung Kok
and Tung Fong |
KTN-E185 |
R |
9 |
within the KTN NDA |
2024 |
|
KTN-E186 |
R |
9 |
within the KTN NDA |
2024 |
|
|
KTN-E187 |
R |
9 |
within the KTN NDA |
2024 |
|
|
KTN-E188 |
R |
9 |
within the KTN NDA |
2024 |
|
|
Temporary Structure near Tung
Fong |
KTN-E189 |
R |
6 |
within the KTN NDA |
2024 |
|
KTN-E190 |
R |
6 |
within the KTN NDA |
2024 |
|
|
Village Houses between Tung Kok
and Tung Fong |
KTN-E191 |
R |
6 |
within the KTN NDA |
2024 |
|
Temporary
Structure near Fung Kong |
KTN-E192 |
R |
6 |
within the KTN NDA |
2024 |
|
KTN-E193 |
R |
6 |
within the KTN NDA |
2024 |
|
|
KTN-E194 |
R |
6 |
within the KTN NDA |
2024 |
|
|
KTN-E195 |
R |
6 |
within the KTN NDA |
2024 |
|
|
KTN-E196 |
R |
6 |
within the KTN NDA |
2024 |
|
|
KTN-E197 |
R |
6 |
within the KTN NDA |
2024 |
|
|
KTN-E198 |
R |
6 |
within the KTN NDA |
2024 |
|
|
KTN-E199 |
R |
6 |
within the KTN NDA |
2024 |
|
|
KTN-E200 |
R |
6 |
within the KTN NDA |
2024 |
|
|
KTN-E201 |
R |
6 |
within the KTN NDA |
2024 |
|
|
KTN-E202 |
R |
6 |
within the KTN NDA |
2024 |
|
|
Open Storage nenar Fung Kong |
KTN-E203 |
OS |
1.5 |
within the KTN NDA |
2024 |
|
Temporary
Structure near Lo Wu Fire Range |
KTN-E204 |
R |
3 |
within the KTN NDA |
2024 |
|
Temporary
Structure near Fung Kong Shan |
KTN-E205 |
OU |
3 |
within the KTN NDA |
2019 |
|
KTN-E206 |
OU |
3 |
within the KTN NDA |
2019 |
|
|
KTN-E207 |
OU |
3 |
within the KTN NDA |
2019 |
|
|
KTN-E208 |
OU |
3 |
within the KTN NDA |
2019 |
|
|
Ma Tso Lung San Tsuen |
KTN-E209 |
R |
9 |
within the KTN NDA |
2044 |
|
Temporary
Structure Western to Ho Sheung Heung Village |
KTN-E210 |
OU |
3 |
within the KTN NDA |
2024 |
|
KTN-E211 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E212 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
KTN-E213 |
OU |
3 |
within the KTN NDA |
2024 |
|
|
Open Storage along Castle Peak
Road - San Tin |
KTN-E1001 |
OS |
1.5 |
991 |
2044 |
|
Container
Trailer Park along Kwu Tung Road |
KTN-E1002 |
OS |
1.5 |
195 |
2044 |
|
Europa
Garden Phase I |
KTN-E1003 |
R |
9 |
23 |
2044 |
|
Lady
Ho Tung Welfare Centre |
KTN-E1004 |
IC |
6 |
73 |
2044 |
|
Valais
Phase 1 |
KTN-E1005 |
R |
9 |
25 |
2044 |
|
KTN-E1006 |
R |
9 |
13 |
2044 |
|
|
KTN-E1007 |
R |
9 |
73 |
2044 |
|
|
Village House north to Casas
Domingo |
KTN-E1008 |
R |
3-9 |
292 |
2044 |
|
St
Paul's House of Prayer |
KTN-E1009 |
W |
12 |
22 |
2044 |
|
Kam
Tsin Village Ho Tung School |
KTN-E1010 |
E |
3 |
9 |
2044 |
|
Golf
Parkview |
KTN-E1011 |
R |
12 |
34 |
2044 |
|
Tsung
Pak Long |
KTN-E1012 |
R |
3-9 |
51 |
2044 |
|
Tsung
Pak Long (Hakka Wai) |
KTN-E1013 |
R |
3-9 |
209 |
2044 |
|
Tai
Tau Leng |
KTN-E1014 |
R |
10 |
568 |
2044 |
|
KTN-E1015 |
R |
10 |
638 |
2044 |
|
|
Choi Ngan House |
KTN-E1016 |
R |
110 |
777 |
2044 |
|
Scattered Village Houses at
Northern Boundary of KTN |
KTN-E1017 |
R |
3-9 |
14 |
2044 |
|
KTN-E1018 |
R |
3-9 |
11 |
2044 |
|
|
Village Houses at Ma Tso Lung |
KTN-E1019 |
R |
3-9 |
27 |
2044 |
|
Village
Houses at Tit Hang |
KTN-E1020 |
R |
3-9 |
27 |
2044 |
|
Workshop
northwest to Pak Shek Au |
KTN-E1021 |
I |
9 |
17 |
2044 |
|
Chau
Tau Tsuen |
KTN-E1022 |
R |
9 |
509 |
2044 |
|
Village
House southeast to Chau Tau Tsuen |
KTN-E1023 |
R |
3-9 |
150 |
2044 |
|
Open
Storage north to Pai Tau Lo |
KTN-E1024 |
OS |
1.5 |
360 |
2044 |
Notes:
[1] Existing ASRs inside NDAs would be resumed
for development, and thus the time effect has been considered for the
identification of existing ASRs: i.e. KTN-E1 would not be identified as an ASR
after Year 2018.
[2] R– Residential; E – Educational; H – Hospital/Clinic/ home for the aged; G – Government; IC – Institution and
Community; O – Open space; OS – Open storage; RC – Recreational; OU
– Other specific uses
Table 3.4 – Representative existing ASRs within 500m assessment area and in the vicinity of FLN NDA
|
Description |
ASRID |
Landuse |
Building
Height Above Ground (approx.) (m) |
Separation
Distance between ASR and Site Boundary (approx.) (m) |
Assessment
Year
[1] |
|
Village
Houses at Fu Tei Au Tsuen (Western) |
FLN-E1 |
R |
3-9 |
within the FLN NDA |
2024 |
|
Agriculture
Lands at Fu Tei Au Tsuen |
FLN-E2 |
AGR |
3-9 |
within the FLN NDA |
2044 |
|
FLN-E3 |
AGR |
3-9 |
within the FLN NDA |
2044 |
|
|
FLN-E4 |
AGR |
3-9 |
within the FLN NDA |
2044 |
|
|
FLN-E5 |
AGR |
3-9 |
within the FLN NDA |
2044 |
|
|
FLN-E6 |
AGR |
3-9 |
within the FLN NDA |
2044 |
|
|
FLN-E7 |
AGR |
3-9 |
within the FLN NDA |
2044 |
|
|
FLN-E8 |
AGR |
3-9 |
within the FLN NDA |
2044 |
|
|
FLN-E9 |
AGR |
3-9 |
within the FLN NDA |
2044 |
|
|
FLN-E10 |
AGR |
3-9 |
within the FLN NDA |
2044 |
|
|
FLN-E11 |
AGR |
3-9 |
within the FLN NDA |
2044 |
|
|
FLN-E12 |
AGR |
3-9 |
within the FLN NDA |
2044 |
|
|
Man
Ming Temple at Fu Tei Au Tsuen |
FLN-E13 |
W |
3-9 |
within the FLN NDA |
2044 |
|
Village
Houses at Fu Tei Au Tsuen (Eastern) |
FLN-E14 |
R |
3-9 |
within the FLN NDA |
2024 |
|
FLN-E15 |
R |
3-9 |
within the FLN NDA |
2018 |
|
|
FLN-E16 |
R |
3-9 |
within the FLN NDA |
2018 |
|
|
FLN-E17 |
R |
3-9 |
within the FLN NDA |
2018 |
|
|
FLN-E18 |
R |
3-9 |
within the FLN NDA |
2018 |
|
|
FLN-E19 |
R |
3-9 |
within the FLN NDA |
2018 |
|
|
FLN-E20 |
R |
3-9 |
within the FLN NDA |
2018 |
|
|
FLN-E21 |
R |
3-9 |
within the FLN NDA |
2018 |
|
|
FLN-E22 |
R |
3-9 |
within the FLN NDA |
2018 |
|
|
FLN-E23 |
R |
3-9 |
within the FLN NDA |
2018 |
|
|
FLN-E24 |
R |
3-9 |
within the FLN NDA |
2044 |
|
|
FLN-E25 |
R |
3-9 |
within the FLN NDA |
2044 |
|
|
FLN-E26 |
R |
3-9 |
within the FLN NDA |
2044 |
|
|
FLN-E27 |
R |
3-9 |
within the FLN NDA |
2044 |
|
|
FLN-E28 |
R |
3-9 |
within the FLN NDA |
2044 |
|
|
Hung
Kiu Sun Tsuen |
FLN-E29 |
R |
3-9 |
within the FLN NDA |
2018 |
|
FLN-E30 |
R |
3-9 |
within the FLN NDA |
2018 |
|
|
FLN-E31 |
R |
3-9 |
within the FLN NDA |
2018 |
|
|
FLN-E32 |
R |
3-9 |
within the FLN NDA |
2018 |
|
|
FLN-E33 |
R |
3-9 |
within the FLN NDA |
2018 |
|
|
FLN-E34 |
R |
3-9 |
within the FLN NDA |
2018 |
|
|
FLN-E35 |
R |
3-9 |
within the FLN NDA |
2018 |
|
|
Temporary
Structure Southern to Ng Tung River |
FLN-E36 |
OU |
3 |
within the FLN NDA |
2019 |
|
FLN-E37 |
OU |
3 |
within the FLN NDA |
2019 |
|
|
FLN-E38 |
OU |
3 |
within the FLN NDA |
2019 |
|
|
FLN-E39 |
OU |
3 |
within the FLN NDA |
2019 |
|
|
FLN-E40 |
OU |
3 |
within the FLN NDA |
2019 |
|
|
FLN-E41 |
OU |
3 |
within the FLN NDA |
2019 |
|
|
FLN-E42 |
OU |
3 |
within the FLN NDA |
2019 |
|
|
FLN-E43 |
OU |
3 |
within the FLN NDA |
2024 |
|
|
FLN-E44 |
OU |
3 |
within the FLN NDA |
2024 |
|
|
FLN-E45 |
OU |
3 |
within the FLN NDA |
2019 |
|
|
FLN-E46 |
OU |
3 |
within the FLN NDA |
2024 |
|
|
FLN-E47 |
OU |
3 |
within the FLN NDA |
2024 |
|
|
FLN-E48 |
OU |
3 |
within the FLN NDA |
2024 |
|
|
FLN-E49 |
OU |
3 |
within the FLN NDA |
2024 |
|
|
FLN-E50 |
OU |
3 |
within the FLN NDA |
2024 |
|
|
FLN-E51 |
OU |
3 |
within the FLN NDA |
2024 |
|
|
FLN-E52 |
OU |
3 |
within the FLN NDA |
2024 |
|
|
FLN-E53 |
OU |
3 |
within the FLN NDA |
2024 |
|
|
FLN-E54 |
OU |
3 |
within the FLN NDA |
2024 |
|
|
FLN-E55 |
OU |
3 |
within the FLN NDA |
2024 |
|
|
Tin
Ping Shan Tsuen |
FLN-E56 |
R |
3-9 |
within the FLN NDA |
2024 |
|
FLN-E57 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E58 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E59 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E60 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E61 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
Scattered
Village Houses North of Proposed Potential Town-park |
FLN-E62 |
R |
3-9 |
within the FLN NDA |
2025 |
|
Temporary
Structure Eastern to Woodland Crest |
FLN-E63 |
OU |
3 |
within the FLN NDA |
2024 |
|
Temporary
Structure at Wu Nga Lok Yeung (Western) |
FLN-E64 |
R |
3-9 |
within the FLN NDA |
2024 |
|
FLN-E65 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E66 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E67 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E68 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E69 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
Temporary
Structure at Ma Shi Po (Eastern) |
FLN-E70 |
R |
3-6 |
within the FLN NDA |
2019 |
|
Temporary
Structure at Wu Nga Lok Yeung (Northern) |
FLN-E71 |
R |
3-9 |
within the FLN NDA |
2024 |
|
FLN-E72 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
Village
Houses at Ma Shi Po (Northern) |
FLN-E73 |
R |
3-9 |
within the FLN NDA |
2024 |
|
FLN-E74 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E75 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E76 |
R |
3-9 |
within the FLN NDA |
2019 |
|
|
Village
Houses at Ma Shi Po (Eastern) |
FLN-E77 |
R |
3-9 |
within the FLN NDA |
2019 |
|
FLN-E78 |
R |
3-9 |
within the FLN NDA |
2019 |
|
|
FLN-E79 |
R |
3-9 |
within the FLN NDA |
2019 |
|
|
FLN-E80 |
R |
3-9 |
within the FLN NDA |
2019 |
|
|
FLN-E81 |
R |
3-9 |
within the FLN NDA |
2019 |
|
|
FLN-E82 |
R |
3-9 |
within the FLN NDA |
2019 |
|
|
FLN-E83 |
R |
3-9 |
2019 |
||
|
FLN-E84 |
R |
3-9 |
within the FLN NDA |
2019 |
|
|
North
District Temporary Wholesale Market for Agricultural Products |
FLN-E85 |
G, C |
6 |
within the FLN NDA |
2019 |
|
Temporary
Structure at Wu Nga Lok Yeung (Southern) |
FLN-E86 |
R |
3-9 |
within the FLN NDA |
2024 |
|
FLN-E87 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E88 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E89 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E90 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E91 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
Temporary
Structure at Wu Nga Lok Yeung (Eastern) |
FLN-E92 |
R |
3-9 |
within the FLN NDA |
2024 |
|
FLN-E93 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E94 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E95 |
R |
3-9 |
within the FLN NDA |
2024 |
|
|
FLN-E97 |
R |
3-9 |
within
the FLN NDA |
2024 |
|
|
FLN-E98 |
R |
3-9 |
within
the FLN NDA |
2024 |
|
|
Village
Houses at Ma Shi Po (Southern) |
FLN-E99 |
R |
3-9 |
within
the FLN NDA |
2024 |
|
FLN-E100 |
R |
3-9 |
within
the FLN NDA |
2019 |
|
|
FLN-E101 |
R |
3-9 |
within
the FLN NDA |
2019 |
|
|
FLN-E102 |
R |
3-9 |
within
the FLN NDA |
2019 |
|
|
Buddhist
Li Chong Yuet Ming Nursing Home for The Elderly |
FLN-E103 |
H |
20 |
1150 |
2044 |
|
Choi
Po Court |
FLN-E104 |
R |
110 |
1130 |
2044 |
|
Tai
Tau Leng |
FLN-E105 |
R |
10 |
1260 |
2044 |
|
No.
56 San Fung Avenue |
FLN-E106 |
R |
15 |
650 |
2044 |
|
Po
Sheung Tsuen |
FLN-E107 |
R |
10 |
600 |
2044 |
|
Tsui
Lai Garden |
FLN-E108 |
R |
100 |
330 |
2044 |
|
Hing
Yan Tsuen |
FLN-E109 |
R |
10 |
430 |
2044 |
|
Sheung
Pak Tsuen |
FLN-E110 |
R |
3-9 |
370 |
2044 |
|
Fung
Kai Liu Man Shek Tong Secondary School |
FLN-E111 |
E |
27 |
410 |
2044 |
|
Woodland
Crest |
FLN-E112 |
R |
40 |
40 |
2044 |
|
Tin
Ping Shan Tsuen |
FLN-E113 |
R |
3-9 |
80 |
2044 |
|
Fung Kai
Primary School |
FLN-E114 |
E |
6-9 |
280 |
2044 |
|
Fung
Kai No. 1 Secondary School |
FLN-E115 |
E |
6-9 |
240 |
2044 |
|
Fung
Kai No. 2 Secondary School |
FLN-E116 |
E |
6-9 |
140 |
2044 |
|
Man
Kok Village |
FLN-E117 |
R |
3-9 |
100 |
2044 |
|
Ancestor
of Lui Temple (Tak Yeung Tong) |
FLN-E118 |
W |
3 |
5 |
2044 |
|
Hung
Kiu San Tsuen |
FLN-E119 |
R |
3-9 |
30 |
2044 |
|
Tin
Hau Ancient Temple |
FLN-E120 |
W |
3 |
60 |
2044 |
|
Scattered
Village Houses in Sheung Shui Wa Shan |
FLN-E121 |
R |
3-9 |
140 |
2044 |
|
Scattered
Village Houses North of Proposed Potential Town-park |
FLN-E122 |
R |
3-9 |
40 |
2044 |
|
On
Kwok Villa |
FLN-E123 |
R |
9 |
20 |
2044 |
|
Noble
Hill |
FLN-E124 |
R |
54 |
10 |
2044 |
|
Good
View New Village |
FLN-E125 |
R |
6-9 |
40 |
2044 |
|
Scattered
Village Houses East of Good View New Village |
FLN-E126 |
R |
3-9 |
40 |
2044 |
|
Wing
Fok Centre |
FLN-E127 |
C |
84 |
30 |
2044 |
|
Wing
Fai Centre |
FLN-E128 |
C |
102 |
30 |
2044 |
|
Belair
Monte |
FLN-E129 |
R |
90 |
20 |
2044 |
|
Siu Hang
San Tsuen |
FLN-E130 |
R |
3-9 |
220 |
2044 |
|
Siu
Hang Tsuen |
FLN-E131 |
R |
3-9 |
270 |
2044 |
|
Kan
Lung Tsuen |
FLN-E132 |
R |
3-9 |
120 |
2044 |
|
The
Sisters of the Precious Blood Children Village |
FLN-E133 |
R |
3-9 |
230 |
2044 |
|
San
Uk Tsuen |
FLN-E134 |
R |
3-9 |
60 |
2044 |
|
Wing
Ning Wai |
FLN-E135 |
R |
3-9 |
50 |
2044 |
|
Wing
Ning Tsuen |
FLN-E136 |
R |
10 |
50 |
2044 |
|
FLN-E137 |
R |
10 |
110 |
2044 |
|
|
Ma
Wat Tsuen |
FLN-E138 |
R |
10 |
210 |
2044 |
|
Ma
Wat Wai |
FLN-E139 |
R |
10 |
200 |
2044 |
|
Village
House near Ma Wat Wai |
FLN-E140 |
R |
3-9 |
60 |
2044 |
|
Village
House near Fanling Tsung Kyam Church |
FLN-E141 |
R |
3-9 |
370 |
2044 |
|
Village
House near On Lok Garden |
FLN-E142 |
R |
3-9 |
500 |
2044 |
|
Village
House near Tong Hang |
FLN-E143 |
R |
3-9 |
830 |
2044 |
|
Village
House at Tong Hang |
FLN-E144 |
R |
3-9 |
1260 |
2044 |
|
Wong
Kong Shan |
FLN-E145 |
R |
10 |
1180 |
2044 |
|
FLN-E146 |
R |
10 |
1400 |
2044 |
|
|
Wo Hop Shek Village |
FLN-E147 |
R |
10 |
1590 |
2044 |
|
Kau
Lung Hang |
FLN-E148 |
R |
3-9 |
1760 |
2044 |
|
Shek
Wu Hui Sewage Treatment Works |
FLN-E149 |
G |
6 |
230 |
2044 |
|
On Wu
Centre |
FLN-E150 |
C |
19 |
690 |
2044 |
|
Smile
Centre |
FLN-E151 |
C |
19 |
480 |
2044 |
|
Kader
Industrial Centre |
FLN-E152 |
I |
19 |
620 |
2044 |
|
Heraeus
Technology Centre |
FLN-E153 |
C |
19 |
190 |
2044 |
|
Wo
Fung Building |
FLN-E154 |
I |
19 |
840 |
2044 |
|
Village
House near Wu Nga Lok Yeung |
FLN-E155 |
R |
3-9 |
15 |
2044 |
|
FLN-E156 |
R |
3-9 |
10 |
2044 |
|
|
North
District Sports Ground |
FLN-E157 |
RC |
1.5 |
350 |
2044 |
|
Grand
Tower Block A |
FLN-E158 |
R |
50 |
550 |
2044 |
|
Tin
Ping Estate Tin Mei House |
FLN-E159 |
R |
93 |
280 |
2044 |
|
Golf
Parkville Block 7 |
FLN-E160 |
R |
17 |
130 |
2044 |
|
Yuk
Po Court Tsun Wu House |
FLN-E161 |
R |
65 |
860 |
2044 |
|
Temporary
Structure at Wu Nga Lok Yeung (Eastern) |
FLN-E162 |
R |
3-9 |
within
the FLN NDA |
2024 |
|
FLN-E163 |
R |
3-9 |
within
the FLN NDA |
2024 |
|
|
FLN-E164 |
R |
3-9 |
within
the FLN NDA |
2024 |
|
|
FLN-E165 |
R |
3-9 |
within
the FLN NDA |
2024 |
|
|
FLN-E166 |
R |
3-9 |
within
the FLN NDA |
2024 |
|
|
FLN-E167 |
R |
3-9 |
within
the FLN NDA |
2024 |
|
|
Village
Houses at Ma Shi Po (Southern) |
FLN-E168 |
R |
3-9 |
within
the FLN NDA |
2019 |
|
FLN-E169 |
R |
3-9 |
within
the FLN NDA |
2019 |
|
|
FLN-E170 |
R |
3-9 |
within
the FLN NDA |
2019 |
|
|
Tin
Ping Estate Tin Cheung House |
FLN-E171 |
R |
100 |
310 |
2044 |
|
Sunningdale
Garden Block 1 |
FLN-E172 |
R |
65 |
340 |
2044 |
|
102
Jockeyclub Road |
FLN-E173 |
R |
11 |
500 |
2044 |
|
Grand
Regentville Block 6 |
FLN-E174 |
R |
101 |
200 |
2044 |
Notes:
[1] Existing
ASRs inside NDAs would be resumed for development, and thus the time effect has
been considered for the identification of existing ASRs: i.e. KTN-E1 would not
be identified as an ASR after Year
2018.
[2] R–
Residential; E – Educational; H – Hospital/ Clinic/ Home for the aged; G –
Government; RC – Recreational; W – Worship;
I – Industrial; C – Commercial; AGR – Agricultural; OU – Other specific uses
Table 3.5 – Representative planned ASRs within 500m assessment area and in the vicinity of KTN NDA [1]
|
Land Lot |
Description |
ASRID |
Landuse |
Proposed Building Height Above Ground (m) |
Population Intake
Year |
|
A1-2 |
Residential
home for the elderly (RCHEs); Nursery Classes and Kindergartens; Local
Rehousing [3] |
KTN-1 to KTN-11 |
P |
78.75 - 110.25 |
2023 |
|
A1-4 |
Nursery
Classes and Kindergartens[4] |
KTN-12 to KTN-18 |
R |
68.85 - 97.2 |
2023 |
|
A1-5 |
Nursery
Classes and Kindergartens; Post Offices |
KTN-19 to KTN-28 |
C |
68.85 - 97.2 |
2023 |
|
A1-6 |
Nursery
Classes and Kindergartens[4]; Early
Education and Training Centre |
KTN-29 to KTN-37 |
R |
68.85 - 97.2 |
2029 |
|
A1-8 |
Nursery
Classes and Kindergartens[4] |
KTN-38 to KTN-46 |
H |
68.85
- 97.2 |
2030 |
|
A1-9 |
Residential
Uses |
KTN-47 to KTN65 |
R |
47.25 - 63 |
2031 |
|
A2-11 |
Primary
School |
KTN-66 to KTN-75 |
E |
36 |
2028 |
|
A2-13 |
Secondary
School |
KTN-76 to KTN-81 |
E |
36 |
2028 |
|
A2-2 |
Nursery
Classes and Kindergartens (2 nos); District Elderly Community Centre[3] |
KTN-82 to KTN-99 |
P |
78.75 - 110.25 |
2023 |
|
A2-4 |
Nursery
Classes and Kindergartens[4] |
KTN-100 to KTN-107 |
H |
68.85 - 97.2 |
2030 |
|
A2-5 |
Special
Child Care Centre [4] |
KTN-108 to KTN-115 |
R |
68.85 - 97.2 |
2029 |
|
A2-7 |
Nursery
Classes and Kindergartens; Neighbourhood Elderly Community Centre[3] |
KTN-116 to KTN-128 |
P |
78.75 - 110.25 |
2030 |
|
A2-9 |
Residential
Uses |
KTN-129 to KTN-144 |
R |
47.25 - 63 |
2031 |
|
A3-1 |
Primary
School |
KTN-145 to KTN-149 |
E |
36 |
2028 |
|
A3-2 |
Secondary
School |
KTN-150 to KTN-154 |
E |
36 |
2028 |
|
A3-3 |
Nursery
Classes and Kindergartens (3 nos);
Integrated Children and Youth Services Centre; Day Care Centre for the
Elderly ; Supported Hostel for Ex-mentally Ill Persons , Half-way House
and Long Stay Care Home; Post
Office[3][5] |
KTN-155 to KTN-174 |
P |
78.75 - 110.25 |
2030 |
|
A3-4 |
Primary
School |
KTN-175 to KTN-180 |
E |
36 |
2028 |
|
A3-6 |
Residential
Uses |
KTN-181 to KTN-195 |
R |
47.25 - 63 |
2031 |
|
B2-10 |
Commercial,
Research & Development; Residential and Preservation of Home of Loving
Faithfulness’s Building; Day Activity Centre, Hostel for Severely Mentally Handicapped,
Integrated Vocational and Rehabilitation Service Centre, Hostel for
Moderately Mentally Handicapped Persons:, Hostel for Severely Physically
Handicapped Persons, Care and Attention Home for Severely Disable Persons |
KTN-196 to KTN-203 |
CDA |
45 - 90 |
2029 |
|
B2-12 |
Commercial,
Research & Development |
KTN-204 to KTN-210 |
OU(C,R&D) |
18 - 45 |
2029 |
|
B2-2 |
Hospital,
Polyclinic - Site Reservation: 4700 (sqm) and Clinic - Site Reservation: 2200
(sqm) |
KTN-211 to KTN219 |
GIC |
45 |
2029 |
|
B2-5 |
Primary
School |
KTN-220 to KTN-224 |
E |
36 |
2022 |
|
B2-6 |
Secondary
School |
KTN-225 to KTN-230 |
E |
36 |
2022 |
|
B2-7 |
Primary
School |
KTN-231 to KTN-232 |
E |
36 |
2022 |
|
B2-8 |
Sports
Centre , District Library, Integrated Children and Youth Services |
KTN-233 to KTN-237 |
GIC |
45 |
2022 |
|
B3-12 |
Commercial,
Research & Development |
KTN-238 to KTN-247 |
OU(C,R&D) |
18 - 45 |
2029 |
|
B3-16 |
Visitor
Centre |
KTN-248 to KTN-249 |
GIC |
10 |
2020 |
|
B3-2 |
Post
Office |
KTN-250 to KTN-258 |
OU(C,R&D) |
18 - 45 |
2029 |
|
B3-5 |
Commercial,
Research & Development |
KTN-259 to KTN-264 |
OU(C,R&D) |
18 - 45 |
2029 |
|
B3-8 |
Hotel
and Conference Facilities; Post Office |
KTN-265 to KTN-270 |
OU(C,R&D) |
18 -
45 |
2029 |
|
C1-11 |
Reprovision
Site of Kwu Tung Vegetable Marketing and Credit Co-operative Society |
KTN-271 |
GIC |
- |
2027 |
|
C1-9 |
Long
Valley Core Area, Area for Wetland Enhancement Works and |
KTN-272 to KTN287 |
GIC |
- |
2020 |
|
D1-11 |
Residential
Uses |
KTN-288 to KTN-301 |
R2 |
25.2 - 31.5 |
2031 |
|
D1-12 |
Potential
Activity Centre |
KTN-302 to KTN308 |
GIC |
0 |
2023 |
|
D1-13 |
Potential
Activity Centre |
KTN-309 to KTN314 |
GIC |
0 |
2023 |
|
D1-14 |
Government
Reserve |
KTN-315 to KTN-320 |
GIC |
36 |
2028 |
|
D1-5 |
Village
Resite |
KTN-321 to KTN-326 |
VR |
8.23 |
2024 |
|
D1-7 |
Residential
Uses |
KTN-327 to KTN-347 |
R2 |
66.15 - 78.75 |
2031 |
|
E1-2 |
Primary
School |
KTN-348 to KTN-352 |
E |
36 |
2028 |
|
E1-3 |
District
Headquarters and Divisional Police Station |
KTN-353, KTN-359 to 361 |
GIC |
56.7 |
2029 |
|
E1-3 |
Reprovisioning
of Fan Garden Junior Police Officers' Police Married Quarters |
KTN-354 to KTN-358 |
GIC |
56.7 |
2022 |
|
E1-4 |
Secondary
School |
KTN-362 to KTN367 |
E |
36 |
2028 |
|
E1-5 |
Standard
Swimming Pool and Sports Centre |
KTN-368 to KTN-376 |
GIC |
22.5 |
2028 |
|
E1-6 |
Fire
Station and Ambulance Depot |
KTN-377 to KTN-382 |
GIC |
40.5 |
2022 |
|
E1-7 |
Open Space,
Fung Kong Shan and Cycle Park |
KTN-383 to KTN-390 |
O |
- |
2027 |
|
F1-1 |
Sports
Ground/Sports Complex[6] |
KTN-391 to KTN-394 |
GIC |
13.5 |
2028 |
|
F1-3 |
Reserve
for Supporting Lok Ma Chau Loop Development[6] |
KTN-395 to KTN407 |
OU(R&D) |
45 |
2028 |
|
F1-4 |
Disused
School (Potential for Eco-tourism Education Centre, Holiday Camping or Other
Recreational Uses)[6] |
KTN-408 to KTN-411 |
GIC |
13.5 |
2020 |
|
PFS |
Proposed
houses at Zone A/NE -Temporary Structure/267 |
KTN-C1 |
R |
9 |
2017 |
Notes:
[1] Based
on Revised RODP shown in Appendix 2.1.
[2] R1c – Residential
Zone 1 (with Commercial); R2 – Residential Zone 2; R3 – Residential Zone 3; E –
Educational; CDA – Comprehensive Development Areas; PRH – Public Rental
Housing; GIC – Government, Institution & Community, VR – Village Resite; OU (C, R &D) –
Other Specified Uses (Commercial, Research & Development); OU (NP) – Other Specified Uses (Nature Park); OU (R &D) – Other Specified Uses (Research &
Development); O – Open Space
[3] Free standing non-domestic purpose-built
buildings in PRH sites are for retail and carparking facilities (all carparks
assumed to be underground) are assumed
[4] Commercial podium development of R1c and CDA
sites are assumed to be not more than 2 storeys.
[5] The no. of flats includes that for reprovisioniing of Fan Garden
Junior Police Officers’ Police Married Quarters as well as that for the
District Headquarters Associated Married Staff Quarters.
[6] As per the GFS Helicopter Landing Site Specification Guidelines, development of sites falling within the flight paths of the helipad at Lo Wu Fire Range will be subject to the GFS's (height restriction) requirement for safety (i.e. Section 5(d) of GFS Helicopter Landing Site Specification
Table
3.6 – Representative planned ASRs
within 500m assessment area and in the vicinity of FLN NDA[1]
|
Land
Lot |
Description |
ASRID |
Landuse |
Proposed
Building Height Above Ground (m) |
Population
Intake Year |
|
A1-8 |
Police Driving and Traffic Training Division |
FLN-1
to FLN-14 |
GIC |
31.5 |
2022 |
|
A1-11 |
Weapons Training Division |
FLN-15
to FLN-22 |
GIC |
22.5 |
2022 |
|
B1-7 |
Residential Buildings |
FLN-23
to FLN-33 |
R2 |
31.5
– 47.25 |
2031 |
|
B1-8 |
Village Resite |
FLN-34
to FLN-36 |
VR |
8.23 |
2018 |
|
B1-9 |
Residential Buildings |
FLN-37
to FLN-46 |
R3 |
25.2
- 37.8 |
2031 |
|
B2-4 |
Government Reserve |
FLN-47
to FLN-50 |
GIC |
22.5 |
2028 |
|
B2-6 |
Residential Buildings |
FLN-51
to FLN-58 |
PRH |
63 -
78.75 |
2030 |
|
B2-7 |
Residential Buildings, Nursery Classes and Kindergartens,
Care and Attention Home for Severely Disable Persons [3] |
FLN-59
to FLN-69 |
PRH,
E, H, GIC |
78.75
- 110.25 |
2030 |
|
B2-11 |
Residential Buildings |
FLN-70
to FLN-77 |
PRH |
63 -
78.75 |
2031 |
|
B2-12 |
Residential Buildings, Hostel for Severely Physically
Handicapped Persons, Day Care Centre
for the Elderly, Post Office [3] |
FLN-78
to FLN-88 |
PRH,
H, GIC |
78.75
- 110.25 |
2030 |
|
B3-2 |
Residential Buildings |
FLN-89
to FLN-94 |
PRH |
63 -
78.75 |
2031 |
|
B3-3 |
Residential Buildings, Hostel for Moderately Mentally
Handicapped Persons [3] |
FLN-95
to FLN-106 |
PRH,
H, GIC |
78.75
- 110.25 |
2030 |
|
B3-4 |
Primary School |
FLN-107
to FLN-112 |
E |
36 |
2028 |
|
B3-5 |
Primary School |
FLN-113
to FLN-118 |
E |
36 |
2028 |
|
B3-6 |
Residential and Commercial Buildings, Nursery Classes and
Kindergarten [5] |
FLN-119
to FLN-127 |
R2c,
E |
49.95
- 65.7 |
2031 |
|
B3-7 |
Residential Buildings |
FLN-128
to FLN-135 |
R2 |
47.25
- 63 |
2031 |
|
B3-9 |
Residential Buildings |
FLN-136
to FLN-143 |
R2 |
47.25
- 63 |
2031 |
|
B3-10 |
Secondary School |
FLN-144
to FLN-150 |
E |
36 |
2028 |
|
B3-12 |
Primary School |
FLN-151
to FLN-155 |
E |
36 |
2028 |
|
C2-5 |
Clinic |
FLN-156
to FLN-159 |
H |
22.5 |
2028 |
|
C2-6 |
Sports Centre (Leisure Centre), Integrated Children and
Youth Service Centre, Special Child Care Centre, Early Education and Training
Centre |
FLN-160
to FLN-164 |
RC,
GIC, E |
22.5 |
2029 |
|
C2-7 |
Primary School |
FLN-165
to FLN-170 |
E |
36 |
2028 |
|
C2-8 |
Town Park |
FLN-171
to FLN-181 |
RC |
1.5 |
2027 |
|
C2-9 |
Secondary School |
FLN-182
to FLN-187 |
E |
36 |
2028 |
|
D1-6 |
Existing North District Temporary Wholesale Market for
Agricultural Products |
FLN-188
to FLN-191 |
GIC |
22.5 |
2019 |
|
D2-2 |
Residential Buildings |
FLN-192
to FLN-206 |
HOS |
47.25
- 63 |
2031 |
|
D2-4 |
Residential Buildings |
FLN-207
to FLN-218 |
R2 |
47.25
- 63 |
2031 |
|
D2-6 |
Residential Buildings |
FLN-219
to FLN-225 |
PRH |
63-78.75 |
2030 |
|
D2-9 |
Residential Buildings, Nursery Classes and Kindergartens,
Neighbourhood Elderly Community Centre,
Residential Home for the Elderly, Post Office [5] |
FLN-226
to FLN-243 |
PRH,
E, GIC, H |
94.5
- 110.25 |
2023 |
|
D2-12 |
Residential Buildings |
FLN-244
to FLN-254 |
R2 |
47.25
- 63 |
2024 |
|
D3-1a |
Residential Buildings |
FLN-255
to FLN-264 |
R1 |
78.75
- 94.5 |
2029 |
|
D3-1b |
Residential Buildings |
FLN-265
to FLN-274 |
HOS |
66.15
- 94.5 |
2030 |
|
D3-1c |
Residential and Commercial Buildings, Nursery Classes and
Kindergartens |
FLN-275
to FLN-285 |
R1c,
E |
68.85
- 97.2 |
2029 |
|
D3-3 |
Residential and Commercial Buildings [4] |
FLN-286
to FLN-295 |
R1c |
68.85
- 97.2 |
2031 |
|
D3-4 |
Residential and Commercial Buildings, Nursery Classes and
Kindergartens [4] |
FLN-296
to FLN-310 |
R1c,
E |
68.85
- 97.2 |
2031 |
|
D3-6 |
Residential and Commercial Buildings, Nursery Classes and
Kindergartens [4] |
FLN-311
to FLN-324 |
R1c,
E |
68.85
- 97.2 |
2029 |
|
D3-7 |
Residential and Commercial Buildings [4] |
FLN-325
to FLN-338 |
R1c |
68.85
- 97.2 |
2029 |
|
D3-8 |
Residential Buildings, Nursery Classes and Kindergartens,
Integrated Vocational and Rehabilitation Service Centre |
FLN-339
to FLN-349 |
PRH,
E, GIC |
78.75
- 94.5 |
2030 |
|
D3-11 |
Secondary School |
FLN-350
to FLN-355 |
E |
36 |
2023 |
|
D3-12 |
Primary School |
FLN-356
to FLN-362 |
E |
36 |
2023 |
Notes:
[1] Based
on Revised RODP shown in Appendix 2.1.
[2] R1c – Residential Zone 1 (with Commercial); R2c – Residential Zone
2 (with Commercial); R2 – Residential Zone 2; R3 – Residential Zone 3; E –
Educational; PRH – Public Rental Housing; GIC – Government, Institution &
Community; VR – Village Resite; RC – Recreational; HOS – Home Ownership Scheme
Residential Buildings; H – Hospital/ Clinic/ Home for the aged;
[3] Free
standing non-domestic purpose-built buildings in PRH sites are for retail and
carparking facilities (all carparks assumed to be underground) and assumed to
be not more than 3 stories.
[4] Commercial
podium developments of R1c and R2c sites are assumed to be not more than 2
stories.
[5] Due to site constraints,
free standing non-domestic purpose-built buildings in this PRH site are assumed
to be not more than 5 stories.
3.5.1 Construction Phase
The prediction of dust emissions is based on the typical values and emission factors obtained from United States Environmental Protection Agency (USEPA) Compilation of Air Pollution Emission Factors, AP-42, 5th Edition.
According to the implementation
programme, the
construction of KTN and FLN NDAs will be divided into six development packages. Each of these packages would be implemented according to the development
programme and the associated dusty construction activities for each package will be assessed.
Since the air quality impact due to different construction packages will vary, the assessment identifies the worst case scenario over the entire construction phase to address the specific impacts arising from each of different work areas.
Construction dust assessment for short-term impact (i.e. 1-hour and 24-hour average) will be undertaken by a 3-Tier approach. Tier 1 screening assessment is a theoretical worst case scenario evaluation to identify hot spot areas of construction air quality impact by assuming 100% active construction area for all worksites. The identified hot spot areas will be further assessed by a more focused Tier 2 assessment to predict a more realistic worst case impact by altering the active construction areas to 15% and locating them nearest to the ASRs. Specific hot spot areas will be assessed by a Tier 3 assessment to predict a detailed impact by altering the active construction areas to the actual active area and locating them nearest to the ASRs. Long-term impact (i.e. annual average) will be assessed with 6% active construction area for all work sites. Details discussions are given in the following subsections.
Odour impact due to the emission of existing sewage treating facilities at the Shek Wu Hui Sewage Treatment Works during the expansion works will be also assessed.
The
construction programme given in Appendix
3.1 and
implementation programme given in Appendix
2.1 have been reviewed to identify the
assessment years for inclusion in the assessment.
According to the implementation programme, the Project will be implemented under six development packages.
Each development package comprises a number of works contracts (WC) and are works area of each WC will be divided into sub-areas (up to 6 sub-areas). Construction works at each of these sub-areas will be carried out in sequence based on the estimation as shown in Appendix 3.1.
Within the boundary of each WC, construction works will be carried out and dust emissions will arise from dusty construction activities such as site clearance, ground excavation etc. According to Table 3.7 and the extent of different works contracts given in Appendix 3.3, major site formation for different works contracts will be carried out after the first population intake, i.e. Year 2025 for both KTN NDA and FLN NDA. Hence, Year 2025 is considered as the worst-case scenario for both KTN NDA and FLN NDA.
Table 3.7 – Dust emission sources for dust impact assessment [1]
|
Year when Major Site Formation Works is On-going |
Development Package |
Works Contract/ Dust Emission Sources |
Designated Project |
|
Year 2018 |
Advance Works Package – Infrastructure and
Development at KTN and FLN |
WC03, WC04, WC07, WC09, WC19, WC33 |
DP3, DP4, DP5, DP12 |
|
Package 1 – First Stage of Infrastructure
and Development at KTN and FLN |
WC21 |
||
|
Package 2 – Infrastructure and development
at KTN (South) |
WC31 |
||
|
Year 2021 |
Advance Works Package – Infrastructure and
Development at KTN and FLN |
WC03, WC04, WC06, WC07, WC28, WC32, WC33 |
DP5, DP10, DP13 |
|
Package 2 – Infrastructure and development
at KTN (South) |
WC29 |
||
|
Package 3 - Infrastructure and Development
at KTN (North) |
WC31 |
||
|
Package 4 – Remaining Infrastructure and
Development at FLN (East) |
WC13 |
||
|
Year 2025 |
Package 2 – Infrastructure and development
at KTN (South) |
WC10, WC11, WC26 |
DP1, DP3, DP4, DP8, DP9 |
|
Package 3 - Infrastructure and Development
at KTN (North) |
WC12, WC21, |
||
|
Package 4 – Remaining Infrastructure and
Development at FLN (East) |
WC14, WC15 |
||
|
Package 5 – Remaining Infrastructure and
Development at FLN (West) |
WC22 |
||
|
Year 2028 |
Package 2 – Infrastructure and development
at KTN (South) |
WC10, WC11, WC26 |
DP1, DP4, DP5, DP8, DP9, DP13 |
|
Package 3 - Infrastructure and Development
at KTN (North) |
WC12 |
||
|
Package 4 – Remaining Infrastructure and
Development at FLN (East) |
WC14 |
||
|
|
Package 5 – Remaining Infrastructure and
Development at FLN (West) |
WC22 |
|
Note
[1] Based on Implementation Programme shown in Appendix 2.1.
As certain WCs are scheduled to commence and finish
before or after the worst case assessment year, two additional
assessment years for both KTN and FLN (as shown in Table 3.8) have been adopted.
Moreover, to ensure all the designated projects in
FLN have been covered by the assessment, 4 additional WC/ WC sub-areas i.e.
WC08 and sub-areas b/d/e of WC14 (as shown in Table 3.9) have also
been included.
Table 3.8 – Summary of additional assessment year
|
Name of NDA |
Additional Assessment Year |
|
KTN |
2018, 2028 |
|
FLN |
2018, 2021 |
Table 3.9 – Additional WC included in the assessment
for FLN NDA
|
WC |
Designated Projects |
Proposed Schedule for
the Site Formation Works |
Assessment Year to be included |
|
WC08 |
DP7 & DP11 |
2022 – 2024 |
2021 |
|
WC14b |
DP8 |
2027 – 2029 |
2025 |
|
WC14d |
DP9, DP13 |
2026 – 2028 |
2025 |
|
WC14e |
DP9 |
2028 – 2029 |
2025 |
3.5.1.2 Construction Vehicle Access
Dust emissions from construction vehicle movement within the work contract sites and the temporary construction access routes have been taken into account. An estimated average of 66 trucks/hour would travel into and out of the work contract sites through the construction access routes during working hours.
Effective from September 2009, all grab-mounted dump trucks travelling into and out construction sites should be equipped with suitable covers before the trucks leaving the site. It is expected that dust emission from dump trucks travelling on the temporary construction access road outside the site would be minimal. Construction dust emissions from vehicle movement inside the site are included in the assessment.
3.5.1.3 Operating Hours
Subject to the construction work being required and permitted at night-time and during Sundays or holiday, normal construction working periods of 26 days a month and 12 hours a day are assumed.
3.5.1.4
Tier 1
Screening Assessment
In terms of the construction programme, it should be noted that the sequencing of works activities within individual work sites or areas will be determined by the Contractor and is not known at this stage. However, due to the size of the work sites and the need for orderly sequencing of construction activities, active construction activities will occur in different locations of the work site at different time periods. Therefore, it is not possible to pinpoint the exact locations of individual dust emission sources over the entire work site in any short-term period (i.e. 1-hour and 24-hour).
Base on previous experience, there would be no more than 15% of active work area in each work site during any short period of time. Hence, the chance of having all 15% active works areas is unlikely within an individual work site.
Tier 1 screening assessment is to establish a theoretical worst case scenario for identifying hot spot areas with potential short term 1-hour and 24-hour impacts on ASRs. The basis of the Tier 1 screening assessment for short term impact evaluation has assumed a 100% active work area for all worksites. Areas within the criteria contour (i.e. exceeding the criteria) are considered hot spot locations for which a focused Tier 2 assessment will be conducted.
3.5.1.5
Tier 2
Assessment
In
Tier 2 assessment, each hot spot area is assumed with 15% active works areas
occurring nearest to the potentially worst affected ASRs. Although results of
Tier 2 assessment are still conservative based on previous experience,
areas within the criteria contour (i.e. exceeding the criteria) are considered
hot spot locations for which a focused Tier 3 assessment will be conducted.
3.5.1.6
Tier 3 Assessment
In Tier 3 assessment, the specific hot spot area is assumed with the actual active works areas occurring nearest to the potentially worst affected ASRs. Results of the Tier 3 assessment serve as a representation of the detailed construction dust impact prediction for the study.
3.5.1.7
Long-term
Annual Predictions
Dust modelling assessment for long term annual predictions assumes that the work activities would evenly distribute across the whole area of each site over the year with an effective 6% active work area. In the modelling analysis, the dust emission rates are proportionally reduced to produce this effect in the assessment. Appendix 3.2 present the justifications for the percentage of active areas and tentative construction programme respectively.
3.5.1.8
Dust
Dispersion Modelling
Dust impact assessment was undertaken using the Fugitive Dust Model (FDM) developed by USEPA and approved by EPD. It is a Gaussian plume model for computing air dispersion due to fugitive dust emission. Modelling parameters including dust emission factors, particle size distributions, surface roughness, etc can be referred to in EPD guideline entitled “Guideline on Choice of Models and Model parameters in Air Quality Assessment” and the USEPA AP-42.
The density of dust was 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 3.3.2, the TSP background concentration of 73.1 µg/m3 is adopted for the fugitive dust modelling. 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 the next day), Sunday and public holidays, dust emission would be from site erosion only as there would not be normally construction activities during these hours.
The worst-case 1-hour, 24-hour and annual average TSP concentrations were predicted with Year 2011 meteorological data from Ta Kwu Ling Weather Station and mixing height from King’s Park Station.
Fugitive dust impacts have been modeled for ASR heights at 1.5m, 5m and 10m above ground. Since all the dust generating sources associated with the Project are at ground level only, these assessment levels would therefore represent the worst-case scenario. Both the unmitigated and mitigated scenarios for the project are presented. Key modelling parameters are summarized in Table 3.10.
Table 3.10 - Modelling parameters for FDM
|
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 |
Recent
5-year average value of monitoring stations of rural and new development
category (2007 -2011) |
Shatin, Tai
Po and Yuen Long included as no data available from Tseung Kwan O and Hong
Kong South and Monitoring Stations (73.1 μg/m3) |
|
Modeling
mode |
Flatted
terrain |
- |
|
Meteorological
data |
Data recorded
in 2011 at Ta Kwu Ling (TKL) Meteorological Station |
- |
|
Anemometer
Height |
13m for TKL |
- |
|
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 |
1.5m, 5m and 10m |
- |
3.5.1.9
Dust
Emission Factor and Assumptions
Fugitive dust impact assessment was carried out 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 3.3. References of the calculations of dust emission factors for different dust generating activities are listed in Table 3.11. Detailed descriptions are also discussed in the following sections.
Table 3.11 - References of dust emission
factors for different activities
|
Activities |
Operating Sites |
Equations and Assumptions |
Reference |
|
Heavy construction activities including land
clearance, ground excavation, cut and fill operations, construction of the
facilities, haul road, etc |
All construction and excavation sites |
E = 1.2
tons/acre/month of activity or; = 2.69Mg/hectare/month of activity |
USEPA AP42, S.13.2.3.3 |
|
Wind Erosion |
All construction sites, any stockpile areas, barging
area (all open sites) |
E = 0.85 Mg/hectare/yr (24 hour emission) |
USEPA AP42, S.11.9, Table 11.9.4 |
3.5.2 Operational Phase
The prediction of operational air quality impact covers chimney emission from existing industrial area, road traffic emission from associated road network and odour emission due to the operation of sewage treating facilities at the Shek Wu Hui Sewage Treatment Works and Sheung Sui Slaughter House.
3.5.2.1 Determination of Assessment Year
According to Clause 3.4.4.3 (v) (b) of the EIA Study Brief for this project, the air pollution impacts of future road traffic should be calculated based on the highest emission strength from vehicles within the next 15 years after commencement of operation of the proposed road.
Based on the current implementation schedule, for KTN NDA, the planned roads will be implemented in 3 stages, with completion of the 1st stage for operation in 2021, the 2nd stage for operation in 2028, and the 3rd stage for operation in 2029. For FLN NDA, the planned roads will be implemented in 4 stages, with completion of the 1st stage for operation in 2022, the 2nd stage for operation in 2023, the 3rd stage for operation in 2028, and the 4th stage for operation in 2029. Sensitivity test has been conducted based on these operational years by using the Emfac-HK model (v2.5, dated 3 January 2013) to determine the worst assessment years given the combination of vehicular emission factors and the projected traffic flow. Appendix 3.4 presents the detailed methodology.
3.5.2.2 Vehicular Emission from Open Roads
NO2 and RSP generated from the additional open-road networks associated with the proposed NDAs in the study area are the major air pollutants due to vehicular emissions and have been adopted for assessment of their potential air quality impacts. Additional traffic flow would also be induced on the existing roads and therefore a corresponding increase in vehicular emissions is anticipated. EmFAC-HK was used to calculate the vehicular tailpipe emission in lieu of the traditional fleet average emission factors. The road grouping for this assessment is shown in Annex A of Appendix 3.4.
Preliminary traffic flows in each assessment year presented
in Annex E of Appendix
3.4 have been reviewed and highest traffic flow (either
PM Peak or AM peak) for each assessment year has been selected to represent the
worst case. Appendix 3.4
presents the key assumptions for the EmFAC-HK modelling. A 24-hour daily
profile in terms of total traffic flow has been assumed for all vehicle
classes. Appendix
3.5 presents the detailed estimation of the vehicular
emission factors from open roads for NO2 and RSP within the
assessment area. Assessment points are shown in Table
3.3 and Table 3.4.
The air dispersion model, CALINE4 developed by the California Department of Transport and approved by USEPA was used to assess vehicular emission impacts from the existing and planned road network. In view of the limitation of the model, elevated roads higher than 10m were set to the maximum height of 10m to represent the condition, albeit in a more conservative manner.
In determining the surface roughness, due consideration was given to the number of existing mid-rise and high-rise buildings sited within 1km study area. A surface roughness of 100cm was therefore considered appropriate. Hourly meteorological data, including wind direction, wind speed, temperature and stability, collected from the nearest weather station, the Ta Kwu Ling meteorological station in Year 2011 were adopted in this assessment. The mixing height data from the King’s Park Station in Year 2011 were adopted.
For background concentrations, they were made to the 5 years mean of annual-averaged NO2 and RSP concentration at Shatin, Tai Po, Tseung Kwan O, Hong Kong South and Yuen Long Monitoring Stations from 2007 to 2011. It was assumed that 20% of NOx would be converted to NO2, in accordance with the EPD’s “Guidelines on Choice of Models and Model Parameters”.
In addition, the effect of existing and proposed noise barrier on the dispersion of vehicular emission has been taken into account in this study.
3.5.2.3
Portal
Emission
During the operation of KTN NDA and FLN NDA, a short portion of Castle Peak Road will go beneath the slip roads and another short portion of Fanling Bypass will go beneath the Lung Yeuk Tau Interchange in the form of underpass. Some full-enlcosures are also proposed in both KTN NDA and FLN NDA. In respect of these, the ISCST3 Model was adopted to estimate the portal emission from the underpasses and proposed full-enclosures in accordance with the Permanent International Association of Road Congress Report (PIARC, 1991), where it is assumed that pollutants will be ejected from the portal as a portal jet such that 2/3s of the total emission will be dispersed within first 50m, and the remaining 1/3 of the total emission within the next 50m. Portal emission factors are summarized in Appendix 3.5.
In accordance with the “Practice Note on Control of Air Pollution in Vehicle Tunnels”, the air quality inside the tunnel should achieve the EPD recommended standard of 1ppm NO2 concentration. Given that the length of underpass is less than 200m, mechanical ventilation system will not be required. The in-tunnel air quality assessment for each underpass section and each proposed full-enclosure is given in Appendix 3.6. Results indicated that the EPD recommended standard will be achieved.
3.5.2.5 Chimney Emission from Industrial Areas
Gaseous emissions from the identified existing industrial chimneys identified have been assessed by ISCST3 model. The modelling parameters are listed in Table 3.12. The assumptions, chimney configuration and emission rates presented in the TP13 have been adopted in this assessment. In addition, the chimneys presented in the approved EIA Study “Provision of Cremators at Wo Hop Shek Crematorium” (EIA-146/2008) have been adopted. For the chimneys newly identified during the site survey in 2012, an average fuel usage of 200 L/hr is assumed for the calculation of emissions, while the heights and internal diameters of the chimneys are based on observation.
Table
3.12 – Modelling parameters for ISCST3
|
Parameters |
Input |
|
Background Concentration |
Annual Averaged value recorded from Tai Po, Yuen Long, and Sha Tin
Monitoring Stations (Year 2007 – Year 2011) |
|
Modeling mode |
Urban without terrain effect |
|
Meteorological data |
Ta Kwu Ling weather station in Year 2011; in
accordance with EPD Guidelines on Choice of Models and Model Parameters, the
validity is over 90% |
|
Loading Factor (for existing industrial source only) |
Daytime (0800-2000) : 41% Night-time (2000-0800) : 23% |
Moreover, for the chimney emission from the North District Hospital (NDH), it is noted from the fuel consumption data provided by the hospital (NDH) that about 1,250,000 unit of town gas and 3190 litres of ultra low sulphur diesel oil were used in Year 2009-10. Chimney emissions from these sources were therefore estimated based on the method adopted in approved EIA for Provision of a Poultry Slaughtering Centre in Sheung Shui (AEIAR-142/2009) or emission factor from AP42, USEPA. Table 3.13 summarizes the emission factors. Appendix 3.7 presents the detailed calculations of chimney emission.
Table
3.13 – References of chimney
emission factors
|
Fuel Type |
Pollutant |
Emission
Factor |
Assumptions |
Reference |
|
Fuel Oil |
NOx |
E = 20
lb/103 gal |
- |
USEPA AP42,
S.1.3, Table 1.3-1 |
|
SO2 |
E = 142S
lb/103 gal |
S = 0.5%
(for general fuel) S = 0.005%
(for ultra low sulphur diesel) |
||
|
RSP |
E = 2 lb/103
gal |
- |
||
|
Towngas |
NOx |
E = 220
mg/kWh |
- |
EIA for
Provision of a Poultry Slaughtering Centre in Sheung Shui |
A hospital and polyclinics are also proposed in the KTN NDA, which are considered as a potential emission source. However, during this Final Stage EIA, there is no available information on the chimney design and the pollutant emission rate. The chimney emission is therefore estimated based on pro-rata of the existing information of the NDH.
According to information provided by from Town Gas and Hospital Authority, the fuels are used by Bunsen burners, cooking range, steam boilers and emergency generator. With such application, it is understood that the total chimney emission from a hospital should be proportional to the total number of patient accommodated in the hospital (i.e. number of bed). According to the latest Department of Health Annual Report 2009/10, it is noted that there are a total of 607 beds available in the NDH, while the number of beds in the proposed hospital and polyclinics is estimated to be about 860. Therefore, in order to estimate the emission from the proposed hospital and polyclinics, a correction factor of 1.42 has been multiplied to the chimney emission from NDH.
Expansion of Shek Wu Hui Sewage Treatment Works is proposed in the FLN NDA. According to the outline design report of “Tender for the Provision of Services for Shek Wu Hui Sewage Treatment Works – Further Expansion – Feasibility Study” from EPD, two layout options have been developed. As option 2 is more preferable from an operations and maintenance perspective (see section 3.6.2.3), it is considered as a preferred option and has therefore been adopted by this study for further assessment.
The biogas produced from the sludge digestion process will be collected and stored in the gas holders. After pre-treatment, desulphurization and moisture removal, the biogas will be utilized by a combined heat and power (CHP) generator to produce hot water and electricity, and the residual will be flared in a biogas burner. The CHP and biogas burner are considered as potential emission sources within the assessment area of this study. Appendix 3.7 presents the detailed calculations of biogas production based on the latest design of sewage treatment capacity (190000 m3/day) after the expansion, and the emission rates of CHP and biogas burner.
3.5.2.6 Odour Emission
Dispersion Model and Modelling Parameters
Odour propagation was modelled by AUSPLUME model, which is based on the Gaussian dispersion equation. The use of AUSPLUME has been approved by EPD. Other modelling parameters were determined according to EPD’s “Guidelines on Choice of Models and Model Parameters”.
Hourly meteorological data, including wind speed, wind direction, air temperature, and Pasquill stability class as recorded at the Ta Kwu Ling weather station in 2011, and the daily mixing height data measured at King’s Park Station were obtained from the Hong Kong Observatory for modelling the 1-hour average odour concentrations.
As required in the TM-EIAO, the odour criterion is defined as 5 OU units based on an averaging time of 5 seconds. Hence, it is required to convert the predicted odour concentration in 1-hour averaging time from the AUSPLUME model to 5-second average. Reference has been made to the peak-to-mean ratio stated in the “Approved Methods for Modelling and Assessment of Air Pollutants in New South Wales” published by the Department of Environment and Conservation, New South Wales, Australia (NSW Approved Method). In accordance with the NSW Approved Method, the conversion factors for converting 1-hour average to 1-second average concentration are adopted directly to convert the 1-hour concentration predicted by the AUSPLUME model to 5-second concentration as a conservative approach. The conversion factors for different types of source and stability classes are listed in Table 3.14 below.
Table 3.14 – Conversion factors for 1-hour to 5-second averaging time
|
Pasquill Stability Class |
Point Sources |
Area Sources |
Volume Sources |
|
A |
2.3 |
2.5 |
2.3 |
|
B |
2.3 |
2.5 |
2.3 |
|
C |
2.3 |
2.5 |
2.3 |
|
D |
2.3 |
2.5 |
2.3 |
|
E |
2.3 |
2.3 |
2.3 |
|
F |
2.3 |
2.3 |
2.3 |
The overall modelling parameters are summarised in Table 3.15 for ease of reference.
Table 3.15 – Modelling parameters for AUSPLUME
|
Parameters |
Input |
|
Background
Concentration |
No |
|
Modelling
Mode |
Flat
terrain |
|
Surface
Roughness |
100cm |
|
Meteorological
data |
Ta
Kwu Ling and King’s Park weather station in Year 2011 |
|
Anemometer
Height |
13m |
|
Emission
period |
24-hour |
Odour Emission Rates
Proposed Sewage Treatment Work Expansion in FLN NDA
On-site odour measurement was conducted in September 2011 of different components inside the existing SWHSTW. Since the treatment process of the proposed STW Expansion is in general similar to that of the existing SWHSTW, the odour emission will be similar. As such, the recent odour emission measurement results for existing SWHSTW have been adopted as the basis to estimate the odour emission rates of sources associated with the proposed STW Expansion. The odour measurement was conducted by the Hong Kong Polytechnic University during the hot season to represent the worst-case scenario. Table 3.16 summarises the measured odour emission rates of each source in existing SWHSTW. Table 3.17 summarises the odour emission rate adopted at each source in the proposed STW Expansion. Detailed calculation is presented in Appendix 3.8.
Table 3.16 – Summary of
measured odour emission rate in existing SWHSTW
|
Location |
Maximum Emission Rate (OU/m2/s) |
|
Inlet pumping station |
3.26 |
|
Fine Screening (at screen debris chamber) |
3.51 |
|
Grit Channels |
1.84 |
|
Degritting |
1.10 |
|
Primary Sedimentation Tank (Weir Zone) |
1.54 |
|
Primary Sedimentation Tank (Quiescent Zone) |
4.03 |
|
Bioreactor |
1.65 |
|
Feed Channel to FST |
0.02 |
|
Final Sedimentation Tank |
0.02 |
|
Sludge Holding Tank |
0.43 |
|
Sludge Dewatering House |
0.06 |
|
Thickener |
3.98 |
|
Sludge Conditioning Tank |
0.20 |
Table 3.17 – Odour emission rates for the
proposed STW expansion
|
Odour
Source |
Corresponding
Odour Source in SWHSTW |
Odour
Emission Rate (OU/m2/s) |
|
Inlet Works |
Inlet pumping
station |
3.26 |
|
Primary Sedi |
Primary
Sedimentation Tank (Quiescent Zone) |
4.03 |
|
MBR Pretreatment
Screen |
Primary
Sedimentation Tank (Quiescent Zone) |
4.03 |
|
Bioreactor |
Bioreactor |
1.65 |
|
Membrane Tank |
Final Sedimentation Tank |
0.02 |
|
Primary Sludge
Thickener |
Thickener |
3.98 |
|
SAS
Consolidation House |
Thickener |
3.98 |
|
Sludge Holding
Tank |
Sludge Holding
Tank |
0.43 |
|
Dewatering House |
Sludge Dewatering
House |
0.06 |
All measured odour emission rates adopted for the proposed STW expansion were adjusted to the local ambient temperature. According to the equation from the approved EIA for Harbour Area Treatment Scheme (HATS) Stage 2A (EIA-148/2008) below:
G = M[BOD5]1.07T-20
where G = sulphide flux from wall slimes, g/m2h
[BOD5] = 5-day biochemical oxygen demand
T = temperature, oC
M = coefficient, m/h
For example, maximum
hourly temperature at Ta Kwu Ling during Year 2011 was 36 oC and the
odour emission was measured at temperature ~32-34 oC. Based on the
equation above, the odour emission rate would be increased by 14%-31%.
Existing Sheung
Shui Slaughter House
Reference has been made to the odour emission inventory adopted in the approved EIA study “Supplementary EIA Study for Sheung Shui Slaughter House” (EIA-069/BC). Table 3.18 summarises the odour emission rate of each source under mitigated condition. Appendix 3.8 presents the details of odour emissions.
Table 3.18 – Odour emission
rates for existing Sheung Shui Slaughter House
|
Source Type |
Odour Source |
Mitigated Odour Emission
Rate (OU/s) |
Remarks |
|
Lairages |
Pig
lairage |
597.25 |
Odour emission from
these sources are centralized and released via 1 exhaust. |
|
Manure
collection rooms |
|||
|
Slaughter Block Room 1 |
Blood
handling room |
223.70 |
Odour emission from
these sources are centralized and released via 1 exhaust. |
|
Isolation
lairage |
|||
|
Slaughter Block Room 2 |
Manure
pump rooms |
30.63 |
Odour emissions from
these sources are centralized and released via 1 exhaust. |
|
Pig
bristle chute room |
|||
|
By-product
collection room & unloading bay |
|||
|
By-product Plant |
Wastewater
treatment plant |
1980.70 |
Odour emission from
these sources are centralized and released via 1 exhaust. |
|
By-product
room |
|||
|
Wastewater Treatment Plant |
- |
290.00 |
- |
|
Livestock Transit Pens |
- |
13 |
10 sources in total |
|
Livestock Train
Unloading Area |
- |
7.8 |
20 sources in total |
|
Livestock Truck
Unloading Area |
- |
14.69 |
- |
3.6.1 Construction Phase
3.6.1.1 Construction Dust
The construction programme for the project is listed in Appendix 3.1. It is anticipated that the major construction works associated with the development of the NDAs will be site formation and construction of the following infrastructure:
KTN NDA
·
San
Tin Highway / Fanling Highway Kwu Tung Section Widening (between San Tin
Interchange and Po Shek Wu Interchange) (Major Improvement); (DP1)
·
Castle
Peak Road Diversion (Major Improvement) (DP2)
·
KTN
NDA Road P1 and P2 (New Road), and associated new Kwu Tung Interchange (New
Road) and Pak Shek Au Interchange Improvement (Major Improvement) (DP 3)
·
KTN
NDA Road D1 to D5 (New Road) (DP 4)
·
New
Sewage Pumping Stations (SPS) in KTN (DP5)
·
Utilization
of Treated Sewage Effluent from SWHSTW (DP 7)
FLN NDA
·
Utilization
of Treated Sewage Effluent from SWHSTW (DP 7)
·
Po Shek Wu Interchange Improvement (Major Improvement) (DP 8)
·
Fanling Bypass Western Section (New Road) (DP 9)
·
Fanling Bypass Eastern Section (New Road) (DP10)
·
Shek
Wu Hui Sewage Treatmen Works - Further Expansion at FLN NDA (DP 11)
·
Reprovision of temporary wholesale market in FLN NDA (DP 12)
·
New
Sewage Pumping Stations (SPS) in FLN NDA (DP13)
Potential dust impact from other construction activities such as the utilities works, building and landscape works within the two NDAs is considered to be minor. Locations of the dust emission sources mentioned above for different works contracts are shown in Appendix 3.3.
According to the best available information at the time of this study, the only concurrent projects activities for cumulative air quality assessment are the site formation from the construction work on the Lok Ma Chau Loop during Year 2025. Hence, these concurrent construction activities are included in the construction impact assessment.
3.6.2 Operational Phase
Operational air quality impact assessments have been carried out based on conservative assumptions of the following projects and their cumulative impacts:
KTN NDA
·
San
Tin Highway / Fanling Highway Kwu Tung Section Widening (between San Tin
Interchange and Po Shek Wu Interchange) (Major Improvement) (DP1)
·
Castle
Peak Road Diversion (Major Improvement) (DP2)
·
KTN
NDA Road P1 and P2 (New Road), and associated new Kwu Tung Interchange (New
Road) and Pak Shek Au Interchange Improvement (Major Improvement) (DP 3)
·
KTN
NDA Road D1 to D5 (New Road) (DP 4)
·
New
Sewage Pumping Stations (SPS) in KTN (DP5)
FLN NDA
·
Utilization
of Treated Sewage Effluent from Shek Wu Hui Sewage Treatment Works (SWHSTW) (DP
7)
·
Po
Shek Wu Interchange Improvement (Major Improvement) (DP 8)
·
Fanling
Bypass Western Section (New Road) (DP 9)
·
Fanling
Bypass Eastern Section (New Road) (DP10)
·
Shek
Wu Hui Sewage Treatment Works - Further Expansion at FLN NDA (DP 11)
·
Reprovision
of temporary wholesale market in FLN NDA (DP 12)
·
New
Sewage Pumping Stations (SPS) in FLN NDA (DP13)
3.6.2.1
Industrial
Emission
Existing Industrial Emission
The key environmental pollutants due to industrial chimneys (employing diesel) include nitrogen dioxide (NO2), sulphur dioxide (SO2) and respirable suspended particulates (RSP).
As previously investigated in the “Technical Paper 13 – Planning and Development Study on North East New Territories” (TP13), a number of chimneys were identified in On Lok Tsuen industrial area, located at the junction of Lok Yip Street and Sha Tau Kok Road at Fanling. Other than On Lok Tsuen, there are other industrial chimneys scattered in the area adjacent to KTN NDA and FLN NDA.
Subsequent site surveys and another reconnaissance survey were conducted in 2008 and 2012 respectively to verify the chimneys identified in TP13. The more recent survey revealed that some of these chimneys have been demolished or relocated. Industrial emissions from these chimneys are therefore updated in the assessment accordingly. Site surveys have also identified some chimneys, which were not mentioned in TP13, for the assessment. A total of 14 existing chimneys have been identified within the Study Area.
In addition, with reference to the approved EIA Study “Provision of Cremators at Wo Hop Shek Crematorium” (EIA-146/2008), a total number of 9 chimneys would be installed at the Wo Hop Shek Crematorium, which is located at about 1800m to the South of FLN NDA. These chimneys have been included in this assessment to account for the cumulative impact. The emission of the chimneys has been updated according to the corresponding specified process license.
1. Emission inventory of industrial chimneys are presented in Appendix 3.7 and their locations are illustrated in Figure 3.7.
Chimney Emission
from the North District Hospital (NDH)
Two chimneys located at the NDH are identified within 500m study area from the boundary of NDAs. The latest chimney details as well as fuel consumption data have been obtained from the NDH in 2010, as given in Appendix 3.7, and the information has been included in the assessment to account for the cumulative impact. Figure 3.7 shows the locations of industrial chimneys adopted in the assessment.
Industrial
Emission associated with the NDAs
Based on the latest development plan, KTN NDA and FLN NDA will comprise mainly residential developments with associated employment and community facilities. Chimney emissions have not been identified for the existing rural industrial and open storage sites in NDAs during site survey. It is expected that the operational modes of these relocated industrial premises will be similar to previous industries. Hence, chimney emissions from these industrials are therefore not expected.
A hospital & polyclinics is also proposed in the KTN NDA (Site B2-2), which is considered as a potential emission source. The associated chimney emission has been included in the assessment.
Expansion of Shek Wu Hui Sewage Treatment Works is proposed in the FLN NDA (Site A2-3). Emissions from the CHP and biogas burner are considered as potential emission sources. On comparing with the existing emission, the future emission is anticipated to be increased. The associated chimney emissions have been included in the assessment.
Table 3.19 summarises the air pollution sources within each NDA. Figure 3.8 and Figure 3.9 illustrate the locations of these potential air pollution sources. Emission inventory of air pollutants sources is shown in Appendix 3.7.
Table 3.19 – Industrial emission sources in
each NDA [1]
|
Land lot |
Landuse [2] |
Emission Type |
Description |
|
KTN NDA |
|||
|
B2-2 |
G |
Industrial |
Hospital, polyclinics and clinic |
|
FLN NDA |
|||
|
A2-3 |
OU(STW) |
Industrial |
Sewage treatment works |
Notes:
[1] Based on Revised RODP shown in
Appendix 2.1
[2] G - Government; OU(STW) –
Other specific uses (sewage treatment works)
3.6.2.2 Vehicular Emission
During the operational phase of the Project, major sources of vehicular emission for each NDA include:
KTN NDA
·
Vehicular emission from proposed road networks
within 500m from KTN NDA boundary.
·
Vehicular emission from existing road networks
within 500m from KTN NDA boundary.
· Vehicular emission from San Tin Highway / Fanling Highway Kwu Tung Section Widening (between San Tin Interchange and Po Shek Wu Interchange) (Major Improvement) (DP1)
· Vehicular emission from Castle Peak Road Diversion (Major Improvement) (DP2)
· Vehicular emission from KTN NDA Road P1 and P2 (New Road), and associated new Kwu Tung Interchange (New Road) and Pak Shek Au Interchange Improvement (Major Improvement) (DP 3)
· Vehicular emission from KTN NDA Road D1 to D5 (New Road) (DP 4)
FLN NDA
·
Vehicular emission from proposed road networks within
500m from FLN NDA boundary.
·
Vehicular emission from existing road networks
within 500m from FLN NDA boundary.
· Vehicular emission from Po Shek Wu Interchange Improvement (Major Improvement) (DP 8)
· Vehicular emission from Fanling Bypass Western Section (New Road) (DP 9)
·
Vehicular emission from Fanling Bypass Eastern
Section (New Road) (DP10)
Vehicular tailpipe emissions from open roads are calculated based on the EmFAC-HK model. The latest model version EmFAC-HK v2.5 has been employed in this assessment. Traffic data were prepared by traffic engineer and have been separately submitted to the Transport Department (TD) for endorsement. No adverse comment is raised by TD (see Appendix 3.4). Appendix 3.4 presents the methodology and assumptions adopted in estimating the vehicular emission factors. The results have concluded that Year 2021 is the worst assessment year for KTN NDA and Year 2022 for FLN NDA. Table 3.20 and Table 3.21 below summarize the total daily emissions within each NDA for each of selected assessment years.
Table 3.20 – Summary of total daily air
pollutant emissions for KTN NDA
|
Year of Assessment |
Total Daily NOx
Emission(kg/day) |
Total Daily RSP Emission
(kg/day) |
Remark |
|
2021 |
492 |
28 |
Commissioning
year for 1st Stage road
network |
|
2025 |
350 |
24 |
Interim
year between Year 2021 and Year 2028 |
|
2028 |
271 |
21 |
Commissioning
year for 2nd Stage road network |
|
2029 |
250 |
20 |
Commissioning
year for 3rd Stage road network |
|
2044 |
187 |
16 |
15 years after commencement of operation of
all proposed roads |
Table 3.21 – Summary of total daily air pollutant emissions for FLN NDA
|
Year of Assessment |
Total Daily NOx
Emission (kg/day) |
Total Daily RSP Emission
(kg/day) |
Remark |
|
2022 |
618 |
33 |
Commissioning
year for 1st Stage road
network |
|
2023 |
571 |
32 |
Commissioning
year for 2nd Stage road network |
|
2026 |
434 |
28 |
Interim
year between Year 2023 and Year 2028 |
|
2028 |
355 |
25 |
Commissioning
year for 3rd Stage road network |
|
2029 |
328 |
24 |
Commissioning
year for 4th Stage road network |
|
2044 |
233 |
19 |
15
years after commencement of operation of
all proposed roads |
According to the latest development plan, for KTN NDA, the planned roads will be implemented in 3 stages, with completion of the 1st stage for operation in 2021, the 2nd stage for operation in 2028, and the 3rd stage for operation in 2029. Emissions for Year 2021, Year 2025, Year 2028, Year 2039 and Year 2044 were determined. Year 2021 is taken as the assessment year as vehicular emission within the KTN NDA will be the highest when compared with the other four years. As Year 2029 is the year with all roads opened, this gives the 2nd highest emission, and has also been assessed to predict the air quality impact from the entire open-road network.
For FLN NDA, the planned roads will be implemented in 4 stages, with completion of the 1st stage for operation in 2022, the 2nd stage for operation in 2023, the 3rd stage for operation in 2028, and the 4th stage for operation in 2029. Emissions for Year 2022, Year 2023, Year 2026, Year 2028, Year 2039 and Year 2044 were determined. Year 2022 is taken as the assessment year as it generates the highest vehicular emission within the FLN NDA when compared with the other five years. As Year 2029 is the year with all roads opened, this gives the 2nd highest emission, and has also been assessed to predict the air quality impact from the entire open-road network.
3.6.2.3 Odour Emission
Existing Odour Sources
The existing odour sources adjacent to the KTN and FLN NDAs may include the Sheung Shui Slaughter House (SSSH), Ma Tso Lung Restored Landfill, NENT Landfill and its extension, and livestock farm.
Existing Sheung Shui
Slaughter House (SSSH)
The site
covers an area of about 57,800m2 and comprises several functional
blocks. It can accommodate 12,000 pigs, 2,200 cattle and 300 goats, and the
designed daily production throughput is 5,000 pigs, 400 cattle and 300 goats. Figure 3.9 illustrates
the location of SSSH. The SSSH receives
approximately 100 livestock carrying trucks per day from China via Man Kam To
Boundary Control Point.
Environmental impacts of SSSH has been assessed and presented in the approved EIA study “Supplementary EIA Study for Sheung Shui Slaughter House” (EIA-069/BC). A number of mitigation measures have been implemented in order to reduce the potential odour impact, including wet scrubbers, ozone systems and neutralising agent systems, etc. Table 3.22 summarizes the potential odour sources:
Table
3.22 – Potential odour sources in the existing SSSH and mitigation measures
adopted
|
Area |
Control Technology |
Removal Efficiency (%) |
||
|
Neutralising Spray |
Ozone |
Wet Scrubber |
||
|
Pig lairage |
ü |
|
ü |
97.5 |
|
Manure
collection rooms |
|
ü |
ü |
95 |
|
Blood handling
room |
|
ü |
|
90 |
|
Isolation
lairage |
ü |
|
|
90 |
|
Manure pump
rooms |
|
ü |
|
90 |
|
Pig bristle
chute room |
|
ü |
|
90 |
|
Wastewater
treatment plant |
|
|
ü |
95 |
|
By-product
collection room & unloading bay |
|
ü |
|
90 |
|
By-product room |
|
ü |
|
90 |
|
Livestock
transit pens |
ü |
|
|
90 |
|
Train unloading
area |
ü |
|
|
90 |
|
Livestock truck
unloading area |
ü |
|
|
90 |
Ref: Sheung Shui
Slaughter House Supplementary Environmental Impact Assessment
The current assessment has been conducted based on
information from the approved EIA study “Supplementary EIA Study for Sheung
Shui Slaughter House” (EIA-069/BC).
Ma Tso Lung Restored Landfill
According to information provided by EPD (Special Waste and Landfill Restoration Group, Landfill Restoration and Aftercare Section), the restoration works on the Ma Tso Lung Landfill (MTLL) were completed by the end of May 2000 and it was returned to Tung Wah Group of Hospitals in August 2000 for recreational use. EPD is currently undertaking “Aftercare” of landfill which includes operating and maintaining the landfill gas management system and quarterly monitoring work. The contract period of the Aftercare would last for about 30 years, commencing in June 2000 and completing in May 2030.
In addition,
according to the record of odour monitoring conducted by EPD in 2007-2012,
there was no odour nuisance during this period. The detailed odour monitoring
record is presented in Appendix
3.8. It is
therefore anticipated that MTLL would not cause any odour concern at the
neighbouring receivers and hence would not cause any constraints on the
development plan. As such, odour assessment of MTLL is not necessary. Figure 3.8 illustrates
the location of the Ma Tso Lung Restored Landfill.
NENT Landfill and its Extension
An extension of the existing NENT Landfill is planned to be ready for solid waste disposal after the existing NENT Landfills reaches its capacity. The proposed NENT Extension is about 63 ha in size with an estimated waste capacity of 21.4 Mm3. The NENT Landfill Extension is forecasted to operate for about 10 to 12 years.
NENT Landfill is located approximately 4500m from FLN NDA. With reference to the findings in the approved EIA Study “North East New Territories (NENT) Landfill Extension – Feasibility Study” (EIA-133/2007), odour impact is insignificant at such separation distance. Hence, odour impact on the development is not anticipated.
Livestock Farm
There are scattered livestock farms / poultry farms in the Study Area. Farms within the NDAs will be cleared for development and therefore odour impact from these farms is not anticipated.
Potential Odour Sources
Sewage Treatment Work (STW) Expansion in FLN NDA
To cater for the increase in sewage due to the KTN NDA and FLN NDA, expansion of Shek Wu Hui Sewage Treatment Works is necessary. Based on the capacity and effluent quality requirement, two layout options have been developed in the outline design report of “Tender for the Provision of Services for Shek Wu Hui Sewage Treatment Works - Further Expansion – Feasibility Study” from EPD. These two layout options include:
Option 1: To
conduct separate treatment work of 40,000m3 / day plus 20,000 m3/day
at the proposed site, which is south of Ng Tung River and to retrofit / upgrade
the existing SHSTW to provide 110,000m3/ day at tertiary level.
Option 2: To
retrofit / update the existing facilities so as to confine the whole sewage
stream of 170,000m3/day at tertiary level within the existing SWHSTW
and to construct associated sludge handling facilities at the proposed site.
Option 2 will impose less odour, visual and/or ecological impacts to the adjacent sensitive receivers
and it is more preferable in terms of operations and maintenance perspective. Hence, Option 2 is considered as a
preferred option. Based on the latest design, the sewage treatment
capacity will be upgraded to 190,000 m3/day after the expansion.
The expansion of the Shek Wu Hui Sewage Treatment Works would be carried out in three phases:
·
Phase
1A – from year 2015 to year 2020 (the total treatment capacity will be increase
to 133,000 m3/day)
·
Phase
1B – from year 2021 to year 2023 (the total treatment capacity will be increase
to 153,000 m3/day)
·
Phase
2 – from year 2022 to year 2028 (the total treatment capacity will be increase
to 190,000 m3/day)
During the expansion works, newly constructed and retrofitted odour sources will be covered and provided with deodourizing unit. Therefore, the odour impact from the existing SHWSTW will improve as a result of the expansion works. Potential odour impact of the SWHSTW and other odour emission sources after the completion of the expansion works (i.e the ultimate scenario) will be assessed.
The layout plan of the proposed STW expansion is shown in Figure 3.10. A summary of the key treatment process elements in the proposed STW Expansion for the preferred Option 2 is given below:
|
· Sewage Treatment |
·
Sludge Treatment |
|
· Inlet works · Preliminary Treatment · Equalization · Primary Sedimentation · MBR Pre-treatment Screen ·
Bioreactor and Membrane Filtration System |
·
Primary Sludge Thickening ·
Waste Activated Sludge Thickening ·
Sludge Digestion and Biogas Utilization ·
Sludge Dewatering ·
|
Chlorination and
dechlorination facilities for the treated sewage effluent
Superchlorination will be adopted for colour removal from reclaimed water.
Sodium hypochlorite solution will then be delivered to the contact tank. After mixing of the sodium hypochlorite solution with the treated sewage effluent, the chemical will react with the ammonia in the effluent to form chloramines, which will give a “swimming pool” odour. As superchlorination process resembles breakpoint chlorination, higher dosage of sodium hypochlorite will be added and chloramines will themselves be broken down under this situation resulting their chloramines removed. In addition, the contact tank will be covered. Hence, no odour impact is expected.
Proposed Sewage Pumping
Stations
According to
the latest development plan, a total of 6 sewerage pumping stations (SPS) have
been proposed within the NDAs including KTN D1-3, KTN F1-2, FLN A1-6, FLN B1-4,
FLN B2-3 and FLN C2-3. Potential odour emission sources include wet well and
discharge chamber.
The wet well and other sewage facilities would be covered and foul air ventilated to a deodorizer for treatment before discharge to the environment. The ventilation system would also maintain a slight negative pressure within the facilities. Similar odour mitigation measures have also been implemented at other SPSs in the urban areas which successfully controlled odour nuisance. With proper implementation of these mitigation measures, adverse odour impact from SPS is not anticipated.
Table 3.23 below summarises the location of potential odour emission sources associated with the Project. Figure 3.8 and Figure 3.9 illustrates the location of the proposed sewage pumping stations in KTN NDA and FLN NDA respectively.
Table 3.23 – Summary of potential odour emission sources
associated with the Project [1]
|
Land lot |
Landuse [2] |
Emission Type |
Description |
|
KTN NDA |
|||
|
D1-3 |
OU (SPS) |
Odour |
Sewage pumping station |
|
F1-2 |
OU (SPS) |
Odour |
Sewage pumping station |
|
FLN NDA |
|||
|
A2-3 |
OU(STW) |
Odour |
Sewage treatment works expansion |
|
A1-6 |
OU(SPS) |
Odour |
Sewage pumping station |
|
B1-4 |
OU(SPS) |
Odour |
Sewage pumping station |
|
B2-3 |
OU(SPS) |
Odour |
Sewage pumping station |
|
C2-3 |
OU(SPS) |
Odour |
Sewage pumping station |
Notes:
[1] Based on Revised RODP shown
in Figure 2.5 – 2.7.
[2] OU (SPS) – Other specific uses (sewage pumping
station); OU(STW) – Other specific uses (sewage treatment works).
3.6.2.4 Other Emission Sources
Shooting Range and Weapons
Training Facilities
Two shooting ranges have been identified within and in the vicinity of the NDA sites including Lo Wu Classification Range and San Wai/ Tai Ling Firing Range. Due to security reason, information on the number and types of bullets fired is not available from Hong Kong Police Force (HKPF), and People Liberation Army (PLA).
Weapons training facilities within the weapon training division site (FLN A1-11) of the HKPF are also proposed within the FLN NDA site. Gunfire will be involved in the training activities at this location.
There is limited emission from normal gun shots. With reference to the approved EIA Study “Proposed Shooting Range at Pillar Point Valley Landfill” (DIR-164/2008), the lead content of lead shots is about 97%. Lead dust, including lead metal, lead ion, and oxidized lead compound, are generated during the breakdown of a lead bullet. It is understood that most of airborne lead, in form of lead dust or lead fume, emitted from gunshot comes from the bullet being ejected. Drag force during gun shot is impulsive but not considered to be an important mechanism that would carry lead dust further away and hence the lead emission will be localized. Given that the firing range and weapons training facilities are located in open spaces and accumulation of air pollutants leading to exceedance of criteria is not anticipated, potential impacts due to lead dust emission from the firing practice are not anticipated.
Helipad
Four helipads, at Lo Wu Camp, Crest Hill Operation Base, Lo Wu Classification Range, and San Wai/ Tai Ling Firing Range, have been identified within 500m of the proposed development area. The helipad at Lo Wu Camp has been closed, and is therefore not included in this assessment. The other three helipads at Crest Hill Operation Base, Lo Wu Classification Range, and San Wai/ Tai Ling Firing Range are of low usage frequency and are located at open spaces, and therefore accumulation of emissions from helicopters associated with these three helipads are not expected.
3.6.2.5 Emission from Concurrent Projects
Committed Liantang / Heung Yuen Wai BCP
and its associated road networks
The Liantang/ Heung Yuen Wai BCP will connect with the Eastern Corridor and provide efficient access to Guangdong, Fujian, and Jiangxi for enhancing ties between Hong Kong and the Mainland. It will also help extend the economic hinterland of Hong Kong and Shenzhen and promote regional development. In addition, the BCP will satisfy the long-term transport needs and help re-distribute the cross-boundary traffic from Man Kam To BCP and Sha Tau Kok BCP to alleviate the frequent traffic congestions.
For the purpose of cumulative air quality assessment, the induced traffic caused by Liantang/ Heung Yuen Wai BCP and the road sections located within 500m from the project boundary have been included in this assessment.
In addition, according to the approved EIA Study of “Liantang / Heung Yuen Wai Boundary Control Point and Associated Works” (AEIAR-161/2011), vehicular emissions inside the long tunnel with a length of about 4.8km would be released via a ventilation shaft located near the Tong Hang Tung Chuen, which is within 500m of the study area. The tunnel emission from the ventilation shaft at its southern portal has also been included in the assessment to account for the cumulative impact.
Planned Development of Lok Ma Chau Loop
In the “Hong Kong 2030: Planning Vision and Strategy Study”, the Lok Ma Chau Loop was identified as an area having potential for special uses pertinent to its boundary location. A comprehensive plan has been formulated for the development of the Loop meet the long-term social, economic and environmental needs.
The induced traffic flow due to the operation of the eastern connection road of the Lok Ma Chau Loop has been included to take into account the cumulative air quality impacts in this assessment.
3.7.1 Construction Phase
For fugitive dust impacts, the environmental performance of
the unmitigated scenario would likely exceed the TSP criterion at majority of ASR locations. Therefore, mitigation measures are needed to reduce the predicted dust impacts. Appendix 3.9 shows the results of unmitigated scenarios for the two NDA areas and Tables
3.24 to 3.26 present a summary of these results. Figures 3.11 to 3.28 show
the contours of unmitigated cumulative 1-hour, 24-hour, and annual TSP
concentrations in the study area. Results of dust impact assessment with
mitigations are discussed in Section
3.8.
Table 3.24 – Summary of 1-hour TSP concentrations
results under unmitigated scenario
|
NDA |
Assessment Year |
1-hour TSP Concentrations
at Various Heights (µg/m3) |
||
|
1.5m |
5m |
10m |
||
|
KTN |
2018 |
603 - 9280 |
662 – 5609 |
626 – 3287 |
|
2025 |
1624 – 12631 |
1799 – 7805 |
1698 – 5236 |
|
|
2028 |
430 – 10095 |
460 – 5464 |
426 – 3143 |
|
|
FLN |
2018 |
138 - 7227 |
150 - 3129 |
147 - 1688 |
|
2021 |
587 – 7494 |
653 – 5070 |
622 - 3473 |
|
|
2025 |
568 – 7124 |
646 - 5038 |
619 – 3374 |
|
Notes:
[1] Values which exceed the criterion of
500 µg/m3 are
shown in bold
[2] Values include background concentration: 73.1 µg/m3 of TSP.
Table 3.25 – Summary of 24-hour
TSP concentrations results under unmitigated scenario
|
NDA |
Assessment Year |
24-hour TSP
Concentrations at Various Heights (µg/m3) |
||
|
1.5m |
5m |
10m |
||
|
KTN |
2018 |
102 – 2593 |
105 – 1335 |
103 – 858 |
|
2025 |
159 – 3667 |
168 – 2339 |
163 – 1537 |
|
|
2028 |
114 – 2504 |
117 – 1458 |
113 – 836 |
|
|
FLN |
2018 |
78 - 1854 |
78 – 872 |
78 - 460 |
|
2021 |
135 – 2321 |
141 – 1358 |
137 – 807 |
|
|
2025 |
132 - 1775 |
138 – 1167 |
133 – 749 |
|
Notes:
[1] Values which exceed the criterion of
260 µg/m3 are
shown in bold
[2] Values include background concentration:
73.1 µg/m3 of TSP.
Table 3.26
– Summary
of annual TSP concentrations results under
unmitigated scenario
|
NDA |
Assessment Year |
Annual TSP Concentrations at
Various Heights (µg/m3) |
||
|
1.5m |
5m |
10m |
||
|
KTN |
2018 |
73.1 – 120.0 |
73.2 – 99.3 |
73.2 – 88.2 |
|
2025 |
73.3 – 122.0 |
73.3 – 108.5 |
73.3 – 98.4 |
|
|
2028 |
73.2 – 87.5 |
73.2 – 81.0 |
73.2 – 78.2 |
|
|
FLN |
2018 |
73.1 – 95.1 |
73.1 – 83.2 |
73.1 – 77.9 |
|
2021 |
73.7 – 94.9 |
73.8 – 90.3 |
73.7 – 84.5 |
|
|
2025 |
73.5 – 89.4 |
73.2 – 84.2 |
73.2 – 80.5 |
|
Notes:
[1] Values which exceed the criterion of
80 µg/m3 are
shown in bold
[2] Values include background concentration:
73.1 µg/m3 of TSP.
3.7.2 Cumulative Emission during Operational Phase
3.7.2.1 NO2 and RSP
The cumulative 1-hour, 24-hour and annual NO2 concentrations and 24-hour and annual RSP concentrations generated by chimney plume impingement and vehicular emission have been assessed at all existing and planned ASRs in KTN NDA for the worst case assessment year of Year 2021 and in FLN NDA for the worst case assessment year of Year 2022. The assessment results are presented in Appendix 3.10. A summary of the results for the worst case assessment year at worst hit level is presented in Table 3.27:
Table 3.27 – Cumulative NO2 and RSP concentrations at
worst hit level at worst assessment year
|
NDA |
Worst
Assessment Year |
NO2
Concentration (µg/m3) |
RSP
Concentration (µg/m3) |
|||
|
1-Hour |
24-Hour |
Annual |
24-Hour |
Annual |
||
|
Background |
48.5 |
50.5 |
||||
|
Vehicular Emission and Chimney Emission |
||||||
|
KTN |
2021 |
10.7 – 84.0 |
1.5 – 22.8 |
0.3 – 10.2 |
0.6 – 5.8 |
0.2 – 2.6 |
|
FLN |
2022 |
15.8 – 57.8 |
2.9 – 18.8 |
0.7 – 10.7 |
0.7 – 5.6 |
0.2 – 3.1 |
|
Cumulative Concentration |
||||||
|
KTN |
2021 |
59.2 – 131.4 |
50.0 – 71.3 |
48.8 – 58.7 |
51.1 – 56.3 |
50.7 – 53.1 |
|
FLN |
2022 |
64.3 – 106.3 |
51.4 – 67.3 |
49.2 –59.2 |
51.2 – 56.1 |
50.7 – 53.6 |
Notes:
[1] Worst hit
No
Note:
[1] Worst hit level is 1.5m above
ground.
The following figures illustrate the contour plots of NO2 and RSP:
· Figures 3.29 – 3.31: 1-hour, 24-hour and annual NO2 concentrations at 1.5m above ground in KTN NDA at Year 2021
· Figures 3.32 – 3.34: 1-hour, 24-hour and annual NO2 concentrations at 1.5m above ground in FLN NDA at Year 2022
· Figures 3.35 – 3.36: 24-hour and annual RSP concentrations at 1.5m above ground in KTN NDA at Year 2021
· Figure 3.37 – Figure 3.38: 24-hour and annual RSP concentrations at 1.5m above ground in FLN NDA at Year 2022
For KTN NDA in Year 2021, no exceedances of NO2 and RSP concentrations are identified at all ASRs within 500m from the boundary of KTN NDA and associated road networks, except annual-averaged RSP concentrations at certain areas within and along Fanling Highway. These non-compliance regions do not encroach into any air sensitive use. Adverse cumulative air quality impact within and in the vicinity of KTN NDA is not anticipated during operational phase in Year 2021.
For FLN NDA in Year 2022, no exceedances of NO2 and RSP concentrations are identified at all ASRs within 500m from the boundary of FLN NDA and associated road networks, except that exceedance in annual-averaged RSP concentration at certain areas within and along Fanling Highway is observed. These non-compliance regions do not encroach into any air sensitive use. Adverse cumulative air quality impact within and in the vicinity of FLN NDA is not anticipated during operational phase in Year 2022.
Since the entire proposed road network for KTN NDA and FLN
NDA would be completed and operating by Year 2029, the assessment results in Table 3.27 do not
include the emissions from the entire planned open-road development in both
NDAs. According to the emission information between the year of “all roads completed year” and 15 years
after, Year 2029 represents a worst emission scenario for KTN NDA and FLN NDA.
Hence, air quality impact during Year 2029 has also been assessed to provide
supplementary information on air quality impact. Cumulative NO2 and RSP concentrations for “all roads
completion year” at various heights are listed in Appendix 3.10. A summary of results cumulative NO2
and RSP concentrations for all roads completion year at worst hit level is
presented in Table 3.28.
Table 3.28 – NO2 and RSP concentrations at worst hit level at all
roads completion year
|
NDA |
Worst
Assessment Year |
NO2
Concentration (µg/m3) |
RSP
Concentration (µg/m3) |
|||
|
1-Hour |
24-Hour |
Annual |
24-Hour |
Annual |
||
|
Background |
48.5 |
50.5 |
||||
|
Vehicular Emission and Chimney Emission |
||||||
|
KTN |
2029 |
5.7 – 42.8 |
0.9 – 10.5 |
0.2 – 4.5 |
0.5 – 4.4 |
0.2 – 1.7 |
|
FLN |
2029 |
10.0 – 33.6 |
1.8 – 10.2 |
0.2 – 4.5 |
0.6 – 5.8 |
0.2 – 2.6 |
|
Cumulative Concentration |
||||||
|
KTN |
2029 |
54.2 – 91.4 |
49.4 – 59.0 |
48.7 – 53.0 |
51.0 – 54.9 |
50.7 – 52.2 |
|
FLN |
2029 |
58.5 – 82.1 |
50.3 – 58.7 |
49.0 – 54.2 |
51.1 – 56.3 |
50.7 – 53.1 |
Note: [1] Worst hit level is 1.5m above ground.
The following figures illustrate the contour plots of NO2 and RSP:
Figures 3.39 – 3.41: 1-hour, 24-hour and annual NO2 concentrations at 1.5m above ground in KTN NDA at Year 2029
Figures 3.42 – 3.44: 1-hour, 24-hour and annual NO2 concentrations at 1.5m above ground in FLN NDA at Year 2029
Figures 3.45 – 3.46: 24-hour and annual RSP concentrations at 1.5m above ground in KTN NDA at Year 2029
Figures 3.47 – 3.48: 24-hour and annual RSP concentrations at 1.5m above ground in FLN NDA at Year 2029
For KTN NDA in Year 2029, no exceedances of NO2 and RSP concentrations are identified at all ASRs within 500m from the boundary of KTN NDA and associated road networks. Hence, there is no adverse cumulative air quality impact on the ASRs within and in the vicinity of KTN NDA during operational phase in Year 2029.
For FLN NDA in Year 2029, no exceedances of NO2 and RSP concentrations are identified at all ASRs within 500m from the boundary of FLN NDA and associated road networks, except that exccedance in annual-averaged RSP concentration at the area of Po Shek Wu Road Interchange along Fanling Highway is observed. It is also observed that the non-compliance regions do not encroach into any air sensitive use. Hence, there is no adverse cumulative air quality impact in the FLN NDA and the vicinity of FLN NDA during operational phase in Year 2029.
The worst case assessment year for SO2 is considered to be Year 2029 and onwards after the commissioning of the proposed hospital in KTN NDA and the Shek Wu Hui Sewage Treatment Works Expansion. Contours of 1-hour, 24-hour and annual-averaged SO2 concentration from chimney emissions at worst hit level are shown in Figures 3.49 – 3.51 for KTN NDA and Figures 3.52 – 3.54 for FLN NDA. The results show that the predicted SO2 concentrations are well below the relevant criteria in both NDAs. Mitigation measures are not required. Cumulative SO2 concentrations at worst hit level are presented in Appendix 3.11. A summary of cumulative concentrations at all ASRs at worst hit level is presented in the Table 3.29.
Table 3.29 – Cumulative SO2 concentration
at worst hit level at worst assessment year
|
NDA |
SO2
Concentration (µg/m3) |
||
|
1-Hour |
24-Hour |
Annual |
|
|
Background |
14.3 |
||
|
Chimney Emission |
|||
|
KTN |
2.4 – 15.6 [1] |
0.5 – 2.7 [1] |
0.1 – 0.5 [1] |
|
FLN |
5.4 – 45.9
[3] |
0.9 – 7.8 [3] |
0.3 – 1.4 [2] |
|
Cumulative Concentration |
|||
|
KTN |
16.7 – 29.9 [1] |
14.8 – 17.0 [1] |
14.4 – 14.8 [1] |
|
FLN |
19.7 – 60.2 [3] |
15.2 – 22.1 [3] |
14.6 – 15.7 [2] |
Notes:
[1] Worst hit level is 10m above
ground.
[2] Worst hit level is 35m above
ground.
[3] Worst hit level is 40m above
ground.
3.7.2.3 Odour
Proposed Sewage Treatment Work Expansion in FLN NDA
The maximum
5-second averaged odour concentrations at all ASRs in FLN and KTN NDA at Year
2028 and onwards were assessed and presented in Appendix 3.12. No exceedance in odour criterion at all ASRs in FLN and
KTN NDA are identified. According to the contours of odour concentrations at
ground level (1.5m above ground) and worst hit level (55m above ground) shown
in Figure
3.55a and Figure
3.55b, the 5OU non-compliance zone (i.e. at 55m above the
ground) have been identified. According to the revised RODP, there is no sir
sensitive use within the non-compliance zone. Nevertheless, for the future
development, it is necessary to ensure that no sensitive receivers will fall
into this non-compliance zone.
A summary of
results of 5-second averaged odour concentrations at existing and planned
sensitive receivers is presented in Table
3.30.
Table 3.30 – 5-second averaged odour concentration
at sensitive receivers
|
NDA |
ASR Status |
Odour Concentration (OU) |
|
FLN (Year 2028 and onwards) |
Existing |
0.2 – 0.7 [1] |
|
Planned |
0.2 – 0.7 [1] |
|
|
KTN (Year 2028 and onwards) |
Existing |
0.6 [1] |
|
Planned |
0.2 – 0.5 [1] |
Note:
[1] Worst
hit level is at 55m above ground. 5OU unit is identified near the boundary of the SHWSTW
3.8.1 Construction Phase
In order to reduce the dust impact and achieve compliance with TSP criteria at ASRs, mitigation measures in the form of regular watering under good site practice should be adopted. In accordance with the “Control of Open Fugitive Dust Sources” (USEPA AP-42) as given in Appendix 3.2, watering once per hour on exposed worksites and haul roads is proposed to achieve a dust removal efficiency of 92.1%. This dust suppression efficiency is derived from average haul road traffic, average evaporation rate and an assumed application intensity of 1.7 L/m2 for the respective watering frequencies (see Appendix 3.2). Any potential dust impact and watering mitigation would be subject to 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 necessary. 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 1.7 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.
In addition, the Contractor is also obliged to follow the procedures and requirements given in the Air Pollution Control (Construction Dust) Regulation. The regulation 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. 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 material 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 extended 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.
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 project proponent to ensure that the construction dust
impacts are controlled to within the required
criteria. Detailed requirements for the audit and monitoring programme
are given separately in the EM&A manual.
3.8.1.1 Assessment Results – Mitigated Scenarios for
KTN NDA
Short-term
Assessment (Tier 1) for Worst Case Scenario – Year 2025
The maximum 1-hour and 24-hour TSP concentrations from Tier 1 screening assessment have been predicted. Appendix 3.13 shows the assessment results and Table 3.31 below summarises the cumulative 1-hour and 24-hour TSP impact (Tier 1) at the ASRs concerned. The results indicate that, for some of the ASRs, exceedance of 1-hour and 24-hour TSP criteria would not be anticipated even with this theoretical worst case situation where the entire worksites were assumed active (i.e. 100%). However, for the ASRs near the work sites (e.g. Lo Wu Firing Range, District Headquarters Associated Married Staff Quarters, Divisional Police Station and Reprovisioning of Fan Garden Junior Police Officers’ Police Married Quarters), exceedance of 1-hour and 24-hour TSP criteria is still predicted. As the Tier 1 assessment is for screening purposes only and does not reflect the actual on-site activities, a more focused Tier 2 assessment has been undertaken.
Figure 3.61 and Figure 3.62 show the contours of Tier 1 1-hour and 24-hour TSP concentrations respectively.
Short-term Assessment (Tier 2) for Worst
Case Scenario – Year 2025
A more focused Tier 2 assessment has been conducted with the assumed 15% active works areas for the adjacent construction site positioned nearest to the potentially worst affected ASRs. As mentioned in Section 3.6.1.6, the Tier 2 assessment is also very conservative and will lead to over prediction of the dust impacts.
The maximum 1-hour and 24-hour TSP concentrations from Tier
2 screening assessment have been predicted. Appendix 3.14 shows the assessment
results and Table 3.32 below summarises the cumulative 1-hour and 24-hour TSP
impact (Tier 2) at the ASRs concerned. Results show that the cumulative 1-hour
and 24-hour TSP concentrations would comply with the respective criteria except
KTN-97. As such, adverse short-term construction dust impact is not
anticipated.
Contours are presented in Figure 3.63 and Figure 3.64 for 1-hour (Tier 2), and 24-hour (Tier 2) TSP concentrations at 1.5m above ground to illustrate the short-term dust impact on the ASR.
Short-term
Assessment (Tier 3) for Worst Case Scenario – Year 2025
Based on the Tier 2 assessment which is a reasonably conservative,
1-hour TSP exceedance at one ASR is predicted. However, it is estimated that
the actual active area for KTN NDA in 2025 is 7.9%. A more focused Tier 3
assessment has been conducted with the assumed 7.9% active works areas for the
adjacent construction site positioned nearest to the potentially worst affected
ASRs.
The maximum 1-hour and 24-hour TSP concentrations from Tier 3 screening assessment have been predicted. Appendix 3.15 shows the assessment results and Table 3.33 below summarises the cumulative 1-hour and 24-hour TSP impact (Tier 3) at the ASR concerned. 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.
Contours have been presented in Figure 3.65 and Figure 3.66 for 1-hour (Tier 3) and 24-hour (Tier 3) TSP concentrations at 1.5m above ground to illustrate the short-term dust impact on the ASR.
Long-term
Assessment for Worst Case Scenario – Year 2025
The annual TSP concentrations from long-term assessment have been predicted. Appendix 3.13 shows the assessment results and Table 3.34 below summarises the cumulative annual TSP impact at the ASRs concerned concerned. In summary, the predicted annual TSP concentrations at all ASRs would comply with the criterion of 80µg/m3, and therefore, no adverse long-term impact is anticipated. Contour of annual TSP concentrations at 1.5m above ground are shown in Figure 3.67.
Table 3.31
– Tier 1 assessment –
Predicted cumulative 1-hour and 24-hour TSP concentrations at 1.5m above ground
(including background concentration of 73.1μg/m3) under
mitigated scenario in KTN NDA in Year 2025
|
Locations |
ASR |
1-hour TSP concentrations at various
height (µg/m3) |
24-hour TSP concentrations at various
height (µg/m3) |
||||
|
1.5m |
5m |
10m |
1.5m |
5m |
10m |
||
|
Existing ASRs |
|||||||
|
Temporary Structure near Sheung Yue River |
KTN-E24 |
941 |
660 |
446 |
294 |
237 |
189 |
|
Yin Kong Tsuen |
KTN-E85 |
558 |
527 |
409 |
110 |
107 |
100 |
|
KTN-E86 |
501 |
488 |
400 |
102 |
101 |
97 |
|
|
KTN-E87 |
586 |
549 |
418 |
110 |
109 |
103 |
|
|
Sports Ground near Enchi Lodge |
KTN-E88 |
667 |
623 |
478 |
147 |
137 |
117 |
|
Temporary Structure near Castle Peak Road |
KTN-E89 |
531 |
535 |
453 |
104 |
105 |
101 |
|
Ho Sheung Heung Temple |
KTN-E94 |
640 |
587 |
423 |
187 |
173 |
142 |
|
KTN-E97 |
542 |
513 |
409 |
149 |
147 |
132 |
|
|
Lo Wu Firing Range (Eastern) |
KTN-E123 |
514 |
439 |
381 |
175 |
158 |
137 |
|
Lo Wu Firing Range (Western) |
KTN-E128 |
515 |
461 |
392 |
169 |
154 |
135 |
|
Temporary Structure near Fanling Highway (near Pak
Shek Au) |
KTN-E162 |
624 |
403 |
290 |
252 |
172 |
135 |
|
KTN-E163 |
504 |
336 |
291 |
190 |
153 |
131 |
|
|
KTN-E164 |
512 |
407 |
299 |
169 |
158 |
136 |
|
|
KTN-E170 |
503 |
316 |
291 |
176 |
135 |
128 |
|
|
KTN-E173 |
583 |
368 |
293 |
256 |
157 |
129 |
|
|
KTN-E174 |
590 |
325 |
287 |
201 |
139 |
128 |
|
|
KTN-E175 |
701 |
425 |
304 |
245 |
166 |
136 |
|
|
Ma Tso Lung San Tsuen |
KTN-E209 |
731 |
536 |
369 |
171 |
139 |
114 |
|
Lady Ho Tung Welfare Centre |
KTN-E1004 |
517 |
507 |
403 |
140 |
141 |
129 |
|
Valais Phase 1 |
KTN-E1005 |
670 |
612 |
442 |
179 |
171 |
149 |
|
KTN-E1006 |
723 |
657 |
470 |
201 |
196 |
171 |
|
|
KTN-E1007 |
619 |
600 |
471 |
174 |
174 |
158 |
|
|
St Paul's House of Prayer |
KTN-E1009 |
585 |
587 |
481 |
185 |
175 |
143 |
|
Kam Tsin Village Ho Tung School |
KTN-E1010 |
547 |
552 |
462 |
131 |
129 |
117 |
|
Scattered Village Houses at Northern Boundary of
KTN |
KTN-E1017 |
770 |
528 |
384 |
177 |
138 |
112 |
|
KTN-E1018 |
843 |
550 |
372 |
223 |
166 |
125 |
|
|
Village Houses at Ma Tso Lung |
KTN-E1019 |
517 |
513 |
423 |
153 |
155 |
144 |
|
Village Houses at Tit Hang |
KTN-E1020 |
511 |
520 |
442 |
165 |
167 |
152 |
|
Workshop northwest to Pak Shek Au |
KTN-E1021 |
650 |
432 |
306 |
223 |
164 |
136 |
|
Planned/ Committed ASRs |
|||||||
|
Nursery Classes and Kindergartens |
KTN-12 |
539 |
501 |
371 |
171 |
172 |
156 |
|
KTN-13 |
597 |
531 |
372 |
182 |
181 |
161 |
|
|
KTN-17 |
521 |
469 |
376 |
185 |
183 |
163 |
|
|
KTN-18 |
592 |
523 |
377 |
186 |
184 |
163 |
|
|
KTN-19 |
761 |
550 |
394 |
233 |
200 |
170 |
|
|
KTN-20 |
600 |
510 |
383 |
199 |
190 |
166 |
|
|
KTN-21 |
517 |
505 |
400 |
187 |
186 |
164 |
|
|
KTN-22 |
565 |
539 |
408 |
200 |
196 |
169 |
|
|
KTN-23 |
743 |
616 |
400 |
255 |
229 |
179 |
|
|
KTN-24 |
799 |
622 |
395 |
267 |
232 |
179 |
|
|
KTN-25 |
784 |
577 |
382 |
273 |
236 |
180 |
|
|
KTN-26 |
806 |
597 |
375 |
289 |
237 |
177 |
|
|
KTN-27 |
770 |
595 |
385 |
268 |
227 |
176 |
|
|
KTN-28 |
643 |
554 |
393 |
242 |
214 |
174 |
|
|
Nursery Classes and Kindergartens (2 nos);
District Elderly Community Centre |
KTN-85 |
542 |
480 |
395 |
170 |
168 |
152 |
|
KTN-86 |
577 |
489 |
410 |
190 |
174 |
158 |
|
|
KTN-87 |
576 |
515 |
421 |
194 |
179 |
161 |
|
|
KTN-88 |
599 |
576 |
439 |
216 |
203 |
169 |
|
|
KTN-89 |
698 |
632 |
444 |
242 |
223 |
176 |
|
|
KTN-90 |
921 |
661 |
420 |
323 |
239 |
181 |
|
|
KTN-91 |
856 |
628 |
411 |
294 |
238 |
181 |
|
|
KTN-92 |
663 |
586 |
426 |
217 |
207 |
174 |
|
|
KTN-93 |
541 |
529 |
422 |
181 |
180 |
160 |
|
|
KTN-94 |
558 |
537 |
421 |
187 |
186 |
165 |
|
|
KTN-97 |
937 |
640 |
410 |
306 |
241 |
180 |
|
|
KTN-98 |
910 |
673 |
431 |
295 |
242 |
180 |
|
|
KTN-99 |
535 |
523 |
419 |
176 |
176 |
159 |
|
|
Secondary School |
KTN-227 |
521 |
512 |
405 |
174 |
172 |
153 |
|
KTN-228 |
571 |
545 |
410 |
189 |
183 |
157 |
|
|
KTN-229 |
549 |
527 |
409 |
179 |
175 |
153 |
|
|
KTN-230 |
507 |
501 |
403 |
168 |
167 |
149 |
|
|
Primary School |
KTN-231 |
550 |
522 |
401 |
191 |
187 |
163 |
|
KTN-232 |
577 |
548 |
409 |
196 |
190 |
163 |
|
|
Sports Centre, District Library, Integrated
Children and Youth Services Centre and Family Service Centre; Integrated
Community Centre for Mental Wellness, Child Care Centre and Social Security
Field Unit |
KTN-233 |
678 |
595 |
404 |
227 |
212 |
172 |
|
KTN-234 |
773 |
600 |
396 |
251 |
217 |
173 |
|
|
KTN-235 |
842 |
636 |
407 |
243 |
206 |
164 |
|
|
KTN-236 |
713 |
616 |
414 |
203 |
190 |
157 |
|
|
KTN-237 |
624 |
566 |
414 |
197 |
188 |
157 |
|
|
Visitor Centre |
KTN-248 |
970 |
631 |
432 |
242 |
171 |
136 |
|
KTN-249 |
886 |
655 |
444 |
191 |
163 |
134 |
|
|
Long Valley Core Area, Area for Wetland
Enhancement Works and Area for Facilities Supporting the Nature Park |
KTN-272 |
711 |
580 |
446 |
179 |
142 |
127 |
|
KTN-273 |
640 |
608 |
462 |
178 |
166 |
141 |
|
|
KTN-274 |
649 |
572 |
445 |
127 |
125 |
113 |
|
|
KTN-275 |
595 |
573 |
451 |
135 |
133 |
119 |
|
|
KTN-286 |
625 |
548 |
424 |
131 |
116 |
108 |
|
|
KTN-287 |
528 |
529 |
443 |
140 |
124 |
114 |
|
|
Potential Activity Centre |
KTN-302 |
710 |
597 |
417 |
155 |
131 |
118 |
|
KTN-306 |
523 |
514 |
420 |
136 |
135 |
122 |
|
|
KTN-307 |
635 |
586 |
432 |
156 |
148 |
125 |
|
|
KTN-308 |
664 |
581 |
404 |
159 |
136 |
117 |
|
|
KTN-309 |
537 |
517 |
403 |
140 |
131 |
117 |
|
|
KTN-310 |
797 |
551 |
383 |
139 |
128 |
120 |
|
|
KTN-311 |
530 |
408 |
317 |
140 |
126 |
117 |
|
|
KTN-312 |
518 |
471 |
362 |
122 |
123 |
116 |
|
|
Village Resite |
KTN-321 |
803 |
654 |
444 |
190 |
166 |
132 |
|
KTN-322 |
617 |
583 |
441 |
162 |
154 |
130 |
|
|
KTN-323 |
506 |
507 |
420 |
148 |
145 |
128 |
|
|
KTN-325 |
635 |
602 |
453 |
154 |
148 |
127 |
|
|
KTN-326 |
771 |
652 |
455 |
197 |
161 |
128 |
|
|
District Headquarters, District Headquarters
Associated Married Staff Quarters, Divisional Police Station and
Reprovisioning of Fan Garden Junior Police Officers’ Police Married Quarters |
KTN-354 |
850 |
657 |
466 |
285 |
252 |
195 |
|
KTN-355 |
1065 |
684 |
469 |
378 |
264 |
192 |
|
|
KTN-356 |
783 |
602 |
445 |
270 |
231 |
181 |
|
|
KTN-357 |
935 |
661 |
432 |
269 |
210 |
169 |
|
|
KTN-358 |
709 |
618 |
451 |
260 |
231 |
181 |
|
|
Fire Station and Ambulance Depot |
KTN-377 |
687 |
631 |
453 |
174 |
165 |
139 |
|
KTN-378 |
747 |
651 |
448 |
188 |
172 |
140 |
|
|
KTN-379 |
799 |
668 |
448 |
202 |
177 |
141 |
|
|
KTN-380 |
944 |
671 |
448 |
263 |
193 |
145 |
|
|
KTN-381 |
819 |
659 |
450 |
238 |
194 |
146 |
|
|
KTN-382 |
774 |
663 |
456 |
198 |
176 |
141 |
|
|
Disused School (Potential for Eco-tourism
Education Centre, Holiday Camping or Other Recreational Uses) |
KTN-408 |
651 |
505 |
369 |
173 |
146 |
116 |
|
KTN-409 |
741 |
487 |
353 |
196 |
143 |
112 |
|
|
KTN-410 |
756 |
477 |
352 |
212 |
148 |
114 |
|
|
KTN-411 |
837 |
512 |
372 |
217 |
151 |
119 |
|
|
Proposed houses at Zone A/NE -Temporary
Structure/267 |
KTN-C1 |
576 |
552 |
438 |
197 |
189 |
158 |
Notes:
[1] Values which exceed the required criterion of
500 µg/m3 for 1-hour TSP and 260 µg/m3 for 24-hour TSP are shown
in bolded
[2] Values include background concentration:
73.1 µg/m3 of TSP.
Table 3.32 – Tier 2 assessment – Predicted cumulative 1-hour and
24-hour TSP concentrations at 1.5m above ground (including background
concentration of 73.1μg/m3) under mitigated scenario in KTN NDA
in Year 2025.
|
Locations |
ASR |
1-hour TSP concentrations at various
height (µg/m3) |
24-hourTSP concentrations at various
height (µg/m3) |
||||
|
1.5m |
5m |
10m |
1.5m |
5m |
10m |
||
|
Existing ASRs |
|||||||
|
Temporary Structure near Sheung Yue River |
KTN-E24 |
488 |
256 |
160 |
194 |
131 |
103 |
|
Yin Kong Tsuen |
KTN-E85 |
276 |
249 |
183 |
86 |
85 |
82 |
|
KTN-E86 |
220 |
211 |
172 |
84 |
83 |
81 |
|
|
KTN-E87 |
241 |
212 |
154 |
84 |
84 |
82 |
|
|
Sports Ground near Enchi Lodge |
KTN-E88 |
205 |
198 |
165 |
97 |
94 |
86 |
|
Temporary Structure near Castle Peak Road |
KTN-E89 |
158 |
157 |
139 |
83 |
83 |
81 |
|
Ho Sheung Heung Temple |
KTN-E94 |
383 |
248 |
167 |
121 |
107 |
94 |
|
KTN-E97 |
233 |
210 |
152 |
98 |
94 |
87 |
|
|
Lo Wu Firing Range (Eastern) |
KTN-E123 |
383 |
268 |
156 |
111 |
101 |
93 |
|
Lo Wu Firing Range (Western) |
KTN-E128 |
309 |
247 |
163 |
113 |
101 |
93 |
|
Temporary Structure near Fanling Highway (near Pak
Shek Au) |
KTN-E162 |
408 |
250 |
159 |
167 |
120 |
93 |
|
KTN-E163 |
282 |
202 |
146 |
133 |
109 |
92 |
|
|
KTN-E164 |
216 |
175 |
140 |
108 |
101 |
92 |
|
|
KTN-E170 |
223 |
155 |
124 |
105 |
96 |
88 |
|
|
KTN-E173 |
192 |
153 |
124 |
97 |
93 |
86 |
|
|
KTN-E174 |
338 |
164 |
129 |
133 |
99 |
89 |
|
|
KTN-E175 |
348 |
177 |
126 |
123 |
99 |
89 |
|
|
Ma Tso Lung San Tsuen |
KTN-E209 |
281 |
190 |
142 |
104 |
89 |
82 |
|
Lady Ho Tung Welfare Centre |
KTN-E1004 |
184 |
182 |
157 |
92 |
92 |
88 |
|
Valais Phase 1 |
KTN-E1005 |
226 |
222 |
186 |
92 |
92 |
88 |
|
KTN-E1006 |
291 |
244 |
161 |
120 |
110 |
94 |
|
|
KTN-E1007 |
215 |
200 |
150 |
106 |
102 |
92 |
|
|
St Paul's House of Prayer |
KTN-E1009 |
183 |
180 |
154 |
90 |
89 |
86 |
|
Kam Tsin Village Ho Tung School |
KTN-E1010 |
169 |
171 |
154 |
88 |
88 |
85 |
|
Scattered Village Houses at Northern Boundary of
KTN |
KTN-E1017 |
447 |
237 |
142 |
129 |
97 |
86 |
|
KTN-E1018 |
255 |
161 |
123 |
118 |
96 |
87 |
|
|
Village Houses at Ma Tso Lung |
KTN-E1019 |
170 |
172 |
156 |
90 |
91 |
89 |
|
Village Houses at Tit Hang |
KTN-E1020 |
172 |
175 |
160 |
91 |
92 |
89 |
|
Workshop northwest to Pak Shek Au |
KTN-E1021 |
223 |
173 |
123 |
96 |
92 |
87 |
|
Planned/ Committed ASRs |
|||||||
|
Nursery Classes and Kindergartens |
KTN-12 |
291 |
253 |
168 |
99 |
97 |
91 |
|
KTN-13 |
338 |
274 |
164 |
106 |
102 |
94 |
|
|
KTN-17 |
321 |
250 |
161 |
110 |
105 |
93 |
|
|
KTN-18 |
364 |
269 |
167 |
110 |
104 |
92 |
|
|
KTN-19 |
490 |
258 |
169 |
151 |
113 |
95 |
|
|
KTN-20 |
384 |
258 |
167 |
121 |
109 |
93 |
|
|
KTN-21 |
229 |
209 |
153 |
103 |
100 |
92 |
|
|
KTN-22 |
226 |
208 |
155 |
107 |
104 |
94 |
|
|
KTN-23 |
243 |
226 |
173 |
117 |
107 |
94 |
|
|
KTN-24 |
268 |
238 |
174 |
123 |
109 |
96 |
|
|
KTN-25 |
356 |
277 |
172 |
137 |
114 |
99 |
|
|
KTN-26 |
456 |
274 |
170 |
154 |
124 |
103 |
|
|
KTN-27 |
419 |
250 |
163 |
148 |
120 |
101 |
|
|
KTN-28 |
379 |
236 |
160 |
141 |
118 |
99 |
|
|
Nursery Classes and Kindergartens (2 nos);
District Elderly Community Centre |
KTN-85 |
311 |
246 |
156 |
107 |
101 |
94 |
|
KTN-86 |
363 |
228 |
171 |
129 |
107 |
94 |
|
|
KTN-87 |
348 |
221 |
177 |
140 |
113 |
95 |
|
|
KTN-88 |
337 |
250 |
184 |
167 |
126 |
96 |
|
|
KTN-89 |
323 |
267 |
181 |
152 |
119 |
94 |
|
|
KTN-90 |
402 |
285 |
182 |
125 |
110 |
93 |
|
|
KTN-91 |
472 |
268 |
175 |
182 |
136 |
102 |
|
|
KTN-92 |
341 |
270 |
173 |
129 |
120 |
102 |
|
|
KTN-93 |
239 |
222 |
165 |
110 |
107 |
97 |
|
|
KTN-94 |
265 |
244 |
179 |
108 |
105 |
96 |
|
|
KTN-97 |
544 |
275 |
177 |
198 |
136 |
102 |
|
|
KTN-98 |
336 |
270 |
172 |
135 |
110 |
94 |
|
|
KTN-99 |
260 |
243 |
183 |
105 |
103 |
96 |
|
|
Secondary School |
KTN-227 |
193 |
184 |
149 |
95 |
94 |
89 |
|
KTN-228 |
203 |
186 |
153 |
97 |
95 |
89 |
|
|
KTN-229 |
206 |
200 |
167 |
96 |
94 |
89 |
|
|
KTN-230 |
229 |
219 |
175 |
93 |
93 |
88 |
|
|
Primary School |
KTN-231 |
193 |
187 |
155 |
99 |
98 |
91 |
|
KTN-232 |
187 |
184 |
155 |
101 |
98 |
91 |
|
|
Sports Centre, District Library, Integrated
Children and Youth Services Centre and Family Service Centre; Integrated
Community Centre for Mental Wellness, Child Care Centre and Social Security
Field Unit |
KTN-233 |
209 |
202 |
167 |
107 |
102 |
92 |
|
KTN-234 |
238 |
208 |
174 |
117 |
104 |
92 |
|
|
KTN-235 |
282 |
197 |
168 |
118 |
102 |
91 |
|
|
KTN-236 |
205 |
189 |
162 |
104 |
99 |
90 |
|
|
KTN-237 |
218 |
192 |
160 |
100 |
97 |
89 |
|
|
Visitor Centre |
KTN-248 |
See Note [2] |
285 |
169 |
186 |
125 |
101 |
|
KTN-249 |
426 |
289 |
170 |
145 |
117 |
100 |
|
|
Long Valley Core Area, Area for Wetland
Enhancement Works and Area for Facilities Supporting the Nature Park |
KTN-272 |
409 |
292 |
182 |
142 |
101 |
89 |
|
KTN-273 |
286 |
226 |
157 |
121 |
101 |
91 |
|
|
KTN-274 |
413 |
325 |
192 |
107 |
95 |
87 |
|
|
KTN-275 |
279 |
241 |
176 |
96 |
95 |
89 |
|
|
KTN-286 |
346 |
271 |
186 |
101 |
92 |
84 |
|
|
KTN-287 |
255 |
232 |
172 |
108 |
94 |
86 |
|
|
Potential Activity Centre |
KTN-302 |
339 |
237 |
166 |
93 |
86 |
81 |
|
KTN-306 |
164 |
161 |
146 |
86 |
85 |
80 |
|
|
KTN-307 |
237 |
181 |
141 |
92 |
87 |
83 |
|
|
KTN-308 |
314 |
218 |
144 |
108 |
89 |
83 |
|
|
KTN-309 |
225 |
203 |
154 |
85 |
85 |
83 |
|
|
KTN-310 |
334 |
214 |
169 |
94 |
88 |
86 |
|
|
KTN-311 |
241 |
196 |
169 |
90 |
89 |
86 |
|
|
KTN-312 |
206 |
192 |
168 |
88 |
87 |
85 |
|
|
Village Resite |
KTN-321 |
394 |
257 |
167 |
138 |
115 |
95 |
|
KTN-322 |
290 |
236 |
157 |
119 |
111 |
96 |
|
|
KTN-323 |
251 |
225 |
159 |
109 |
105 |
95 |
|
|
KTN-325 |
289 |
234 |
156 |
118 |
110 |
95 |
|
|
KTN-326 |
464 |
274 |
174 |
160 |
121 |
96 |
|
|
District Headquarters, District Headquarters
Associated Married Staff Quarters, Divisional Police Station and
Reprovisioning of Fan Garden Junior Police Officers’ Police Married Quarters |
KTN-354 |
374 |
240 |
174 |
118 |
104 |
92 |
|
KTN-355 |
See Note [2] |
279 |
170 |
158 |
112 |
94 |
|
|
KTN-356 |
See Note [2] |
273 |
174 |
216 |
136 |
100 |
|
|
KTN-357 |
484 |
315 |
176 |
175 |
129 |
101 |
|
|
KTN-358 |
444 |
288 |
183 |
174 |
134 |
101 |
|
|
Fire Station and Ambulance Depot |
KTN-377 |
292 |
229 |
153 |
109 |
101 |
90 |
|
KTN-378 |
336 |
233 |
157 |
123 |
106 |
90 |
|
|
KTN-379 |
365 |
231 |
153 |
132 |
110 |
92 |
|
|
KTN-380 |
473 |
232 |
146 |
179 |
118 |
95 |
|
|
KTN-381 |
436 |
233 |
150 |
174 |
122 |
95 |
|
|
KTN-382 |
338 |
226 |
153 |
133 |
112 |
92 |
|
|
Disused School (Potential for Eco-tourism
Education Centre, Holiday Camping or Other Recreational Uses) |
KTN-408 |
437 |
225 |
151 |
116 |
101 |
87 |
|
KTN-409 |
348 |
208 |
159 |
124 |
98 |
87 |
|
|
KTN-410 |
435 |
228 |
158 |
135 |
99 |
88 |
|
|
KTN-411 |
400 |
228 |
137 |
161 |
105 |
89 |
|
|
Proposed houses at Zone A/NE -Temporary
Structure/267 |
KTN-C1 |
188 |
187 |
164 |
91 |
90 |
86 |
Notes:
[1] Values
which exceed the required criterion of 500 µg/m3 for 1-hour TSP and
260 µg/m3 for 24-hour TSP are shown in bolded
[2] No ASR at the height of 1.5mAG.
[3] Values include background concentration: 73.1 µg/m3 of
TSP.
Table 3.33 – Tier 3 assessment – Predicted
cumulative 1-hour and 24-hour TSP concentrations at 1.5m above ground
(including background concentration of 73.1μg/m3) under
mitigated scenario in KTN NDA in Year 2025.
|
Locations |
ASR |
1-hour TSP concentrations at various height
(µg/m3) |
24-hourTSP concentrations at various
height (µg/m3) |
||||
|
1.5m |
5m |
10m |
1.5m |
5m |
10m |
||
|
Planned/ Committed ASRs |
|||||||
|
Nursery Classes and Kindergartens (2 nos);
District Elderly Community Centre |
KTN-97 |
487 |
251 |
159 |
184 |
128 |
98 |
Notes:
[1] Values include background
concentration: 73.1 µg/m3
of TSP.
Table 3.34 – Long term assessment - predicted cumulative annual
TSP concentrations at 1.5m above ground (including background concentration of
73.1μg/m3) under mitigated scenario in KTN NDA in Year 2025.
|
Locations |
ASR |
Annual TSP
concentrations at various height (µg/m3) |
||
|
1.5m |
5m |
10m |
||
|
Existing
ASRs |
||||
|
Temporary Structure near Sheung Yue River |
KTN-E24 |
75.7 |
75.2 |
74.6 |
|
Yin Kong Tsuen |
KTN-E85 |
73.4 |
73.4 |
73.3 |
|
KTN-E86 |
73.3 |
73.3 |
73.3 |
|
|
KTN-E87 |
73.4 |
73.4 |
73.3 |
|
|
Sports Ground near Enchi Lodge |
KTN-E88 |
73.4 |
73.4 |
73.4 |
|
Temporary Structure near Castle Peak Road |
KTN-E89 |
73.3 |
73.3 |
73.3 |
|
Ho Sheung Heung Temple |
KTN-E94 |
74.3 |
74.1 |
73.8 |
|
Ho Sheung Heung Village |
KTN-E97 |
73.7 |
73.7 |
73.6 |
|
Lo Wu Firing Range (Eastern) |
KTN-E123 |
73.7 |
73.7 |
73.6 |
|
Lo Wu Firing Range (Western) |
KTN-E128 |
73.7 |
73.7 |
73.6 |
|
Temporary Structure near Fanling Highway (near Pak
Shek Au) |
KTN-E162 |
75.3 |
74.5 |
74.0 |
|
KTN-E163 |
74.8 |
74.3 |
73.9 |
|
|
KTN-E164 |
74.3 |
74.1 |
73.9 |
|
|
Temporary Structure at Pak Shek Au |
KTN-E170 |
74.6 |
74.1 |
73.9 |
|
KTN-E173 |
75.1 |
74.2 |
73.8 |
|
|
KTN-E174 |
75.0 |
74.3 |
73.9 |
|
|
KTN-E175 |
75.5 |
74.4 |
73.9 |
|
|
Ma Tso Lung San Tsuen |
KTN-E209 |
73.4 |
73.4 |
73.3 |
|
Lady Ho Tung Welfare Centre |
KTN-E1004 |
73.8 |
73.8 |
73.8 |
|
Valais Phase 1 |
KTN-E1005 |
74.2 |
74.2 |
74.0 |
|
KTN-E1006 |
74.6 |
74.5 |
74.2 |
|
|
KTN-E1007 |
74.2 |
74.2 |
74.0 |
|
|
St Paul's House of Prayer |
KTN-E1009 |
73.6 |
73.6 |
73.5 |
|
Kam Tsin Village Ho Tung School |
KTN-E1010 |
73.3 |
73.3 |
73.3 |
|
Scattered Village Houses at Northern Boundary of
KTN |
KTN-E1017 |
73.4 |
73.4 |
73.3 |
|
KTN-E1018 |
73.6 |
73.5 |
73.4 |
|
|
Village Houses at Ma Tso Lung |
KTN-E1019 |
74.2 |
74.3 |
74.1 |
|
Village Houses at Tit Hang |
KTN-E1020 |
74.1 |
74.1 |
74.0 |
|
Workshop northwest to Pak Shek Au |
KTN-E1021 |
74.6 |
74.2 |
73.8 |
|
Planned/
Committed ASRs |
||||
|
Nursery Classes and Kindergartens |
KTN-12 |
74.5 |
74.5 |
74.4 |
|
KTN-13 |
74.6 |
74.7 |
74.5 |
|
|
KTN-17 |
74.8 |
74.8 |
74.6 |
|
|
KTN-18 |
74.8 |
74.8 |
74.6 |
|
|
Nursery Classes and Kindergartens; Post Offices |
KTN-19 |
75.4 |
75.2 |
74.8 |
|
KTN-20 |
75.0 |
75.0 |
74.7 |
|
|
KTN-21 |
74.7 |
74.7 |
74.5 |
|
|
KTN-22 |
74.8 |
74.8 |
74.6 |
|
|
KTN-23 |
75.4 |
75.3 |
74.8 |
|
|
KTN-24 |
75.6 |
75.4 |
74.9 |
|
|
KTN-25 |
76.1 |
75.7 |
75.1 |
|
|
KTN-26 |
76.3 |
75.9 |
75.2 |
|
|
KTN-27 |
76.1 |
75.8 |
75.2 |
|
|
KTN-28 |
75.7 |
75.5 |
75.0 |
|
|
Nursery Classes and Kindergartens (2 nos);
District Elderly Community Centre |
KTN-85 |
74.9 |
74.9 |
74.6 |
|
KTN-86 |
75.5 |
75.3 |
74.8 |
|
|
KTN-87 |
75.8 |
75.5 |
75.0 |
|
|
KTN-88 |
76.4 |
76.0 |
75.3 |
|
|
KTN-89 |
76.8 |
76.3 |
75.4 |
|
|
KTN-90 |
77.8 |
76.8 |
75.6 |
|
|
KTN-91 |
76.7 |
76.1 |
75.3 |
|
|
KTN-92 |
75.3 |
75.2 |
74.8 |
|
|
KTN-93 |
75.1 |
75.1 |
74.8 |
|
|
KTN-94 |
74.9 |
74.9 |
74.6 |
|
|
KTN-97 |
77.3 |
76.4 |
75.4 |
|
|
KTN-98 |
77.5 |
76.7 |
75.6 |
|
|
KTN-99 |
74.6 |
74.7 |
74.5 |
|
|
Secondary School |
KTN-227 |
74.3 |
74.3 |
74.1 |
|
KTN-228 |
74.4 |
74.4 |
74.2 |
|
|
KTN-229 |
74.3 |
74.3 |
74.1 |
|
|
KTN-230 |
74.2 |
74.2 |
74.0 |
|
|
Primary School |
KTN-231 |
74.6 |
74.6 |
74.4 |
|
KTN-232 |
74.6 |
74.6 |
74.4 |
|
|
Sports Centre, District Library, Integrated
Children and Youth Services |
KTN-233 |
75.1 |
75.0 |
74.6 |
|
KTN-234 |
75.2 |
75.0 |
74.6 |
|
|
KTN-235 |
74.8 |
74.7 |
74.4 |
|
|
KTN-236 |
74.4 |
74.4 |
74.2 |
|
|
KTN-237 |
74.4 |
74.4 |
74.2 |
|
|
Visitor Centre |
KTN-248 |
75.4 |
74.4 |
73.9 |
|
KTN-249 |
74.6 |
74.2 |
73.8 |
|
|
Long Valley Core Area, Area for Wetland
Enhancement Works and |
KTN-272 |
75.1 |
74.3 |
73.8 |
|
KTN-273 |
74.5 |
74.3 |
73.9 |
|
|
KTN-274 |
73.6 |
73.5 |
73.4 |
|
|
KTN-275 |
73.4 |
73.4 |
73.4 |
|
|
KTN-286 |
73.6 |
73.5 |
73.4 |
|
|
KTN-287 |
73.8 |
73.7 |
73.5 |
|
|
Potential Activity Centre |
KTN-302 |
73.6 |
73.6 |
73.5 |
|
KTN-306 |
73.4 |
73.4 |
73.4 |
|
|
KTN-307 |
73.5 |
73.5 |
73.5 |
|
|
KTN-308 |
73.6 |
73.6 |
73.5 |
|
|
KTN-309 |
73.5 |
73.5 |
73.5 |
|
|
KTN-310 |
73.6 |
73.5 |
73.5 |
|
|
KTN-311 |
73.6 |
73.5 |
73.5 |
|
|
KTN-312 |
73.5 |
73.5 |
73.5 |
|
|
Village Resite |
KTN-321 |
74.0 |
73.8 |
73.6 |
|
KTN-322 |
73.7 |
73.7 |
73.5 |
|
|
KTN-323 |
73.6 |
73.6 |
73.5 |
|
|
KTN-325 |
73.6 |
73.6 |
73.5 |
|
|
KTN-326 |
74.0 |
73.7 |
73.5 |
|
|
District Headquarters, District Headquarters
Associated Married Staff Quarters, Divisional Police Station and
Reprovisioning of Fan Garden Junior Police Officers’ Police Married Quarters |
KTN-354 |
77.2 |
76.4 |
75.4 |
|
KTN-355 |
78.5 |
76.7 |
75.4 |
|
|
KTN-356 |
77.2 |
76.3 |
75.3 |
|
|
KTN-357 |
76.6 |
75.9 |
75.0 |
|
|
KTN-358 |
76.8 |
76.1 |
75.2 |
|
|
Fire Station and Ambulance Depot |
KTN-377 |
74.6 |
74.5 |
74.1 |
|
KTN-378 |
75.0 |
74.7 |
74.2 |
|
|
KTN-379 |
75.4 |
75.0 |
74.3 |
|
|
KTN-380 |
76.5 |
75.4 |
74.5 |
|
|
KTN-381 |
76.0 |
75.4 |
74.6 |
|
|
KTN-382 |
75.3 |
75.0 |
74.4 |
|
|
Disused School (Potential for Eco-tourism
Education Centre, Holiday Camping or Other Recreational Uses) |
KTN-408 |
73.5 |
73.5 |
73.4 |
|
KTN-409 |
73.6 |
73.5 |
73.4 |
|
|
KTN-410 |
73.6 |
73.5 |
73.4 |
|
|
KTN-411 |
73.6 |
73.5 |
73.4 |
|
|
Proposed houses at Zone A/NE -Temporary
Structure/267 |
KTN-C1 |
74.1 |
74.1 |
73.8 |
Notes:
[1] Values include background concentration:
73.1 µg/m3 of TSP.
Short-term Assessment (Tier 1) for Year 2018
The maximum 1-hour and 24-hour TSP concentrations from Tier 1 screening assessment have been predicted. Appendix 3.13 shows the assessment results and Table 3.35 below summarises the cumulative 1-hour and 24-hour TSP impact (Tier 1) at the ASRs concerned. The results indicate that, for the majority of ASRs, exceedance of 1-hour and 24-hour TSP criteria is not anticipated even with this theoretical worst case situation where the entire worksites were assumed active (i.e. 100%). However, for the ASRs near the work sites (e.g. Pak Shek Au and Fung Kong), exceedance of 1-hour TSP criterion is still predicted. As the Tier 1 assessment is for screening purposes only and does not reflect the actual on-site activities, a more focused Tier 2 assessment has been undertaken. Figure 3.56 and Figure 3.57 show the contours of Tier 1 1-hour and 24-hour TSP concentrations.
Short-term
Assessment (Tier 2) for Year 2018
A more focused Tier 2 assessment has been conducted with the assumed 15% active works areas for the adjacent construction site positioned nearest to the potentially worst affected ASRs. As mentioned in Section 3.6.1.6, the Tier 2 assessment is also very conservative and will lead to over prediction of the dust impacts.
The maximum 1-hour and 24-hour TSP concentrations from Tier 2 screening assessment have been predicted. Appendix 3.14 shows the assessment results and Table 3.36 below summarises the cumulative 1-hour and 24-hour TSP impact (Tier 2) at the ASRs concerned. 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.
Contours have been presented in Figure 3.58 and Figure 3.59 for 1-hour (Tier 2) and 24-hour (Tier 2) TSP concentrations at 1.5m above ground to illustrate the short-term dust impact on the ASR.
Long-term
Assessment for Year 2018
The annual TSP concentrations from long-term assessment have been predicted. Appendix 3.13 shows the assessment results and Table 3.37 below summarises the cumulative annual TSP impact at the ASRs concerned. In summary, the predicted annual TSP concentrations at all ASRs would comply with the criterion of 80µg/m3, and therefore, no adverse long-term impact is anticipated. Contour of annual TSP concentrations at 1.5m above ground is shown in Figure 3.60.
Table 3.35 –
Tier 1 assessment - predicted cumulative 1-hour and 24-hour TSP concentrations
at 1.5m above ground (including background concentration of 73.1μg/m3)
under mitigated scenario in KTN NDA in Year 2018.
|
Locations |
ASR |
1-hour TSP concentrations at various height (µg/m3) |
24-hourTSP concentrations at various height (µg/m3) |
||||
|
1.5m |
5m |
10m |
1.5m |
5m |
10m |
||
|
Existing
ASRs |
|||||||
|
Village Houses between Tung Kok and Tung Fong |
KTN-E53 |
523 |
370 |
244 |
176 |
151 |
120 |
|
KTN-E54 |
543 |
407 |
250 |
172 |
149 |
120 |
|
|
Temporary Structure at Tung Fong |
KTN-E55 |
692 |
358 |
223 |
269 |
167 |
123 |
|
KTN-E56 |
789 |
363 |
225 |
296 |
178 |
126 |
|
|
KTN-E57 |
729 |
452 |
273 |
204 |
160 |
126 |
|
|
KTN-E58 |
737 |
380 |
231 |
223 |
170 |
130 |
|
|
Temporary Structure at Pak Shek Au |
KTN-E61 |
621 |
386 |
291 |
194 |
140 |
112 |
|
KTN-E62 |
600 |
340 |
271 |
264 |
157 |
115 |
|
|
KTN-E63 |
566 |
331 |
258 |
252 |
144 |
112 |
|
|
KTN-E64 |
635 |
366 |
256 |
256 |
149 |
110 |
|
|
KTN-E65 |
594 |
355 |
261 |
269 |
158 |
115 |
|
|
KTN-E67 |
738 |
412 |
267 |
232 |
141 |
111 |
|
|
KTN-E68 |
676 |
402 |
259 |
239 |
145 |
112 |
|
|
KTN-E69 |
734 |
424 |
275 |
227 |
138 |
108 |
|
|
KTN-E70 |
564 |
466 |
325 |
155 |
136 |
115 |
|
|
KTN-E71 |
762 |
477 |
322 |
235 |
166 |
121 |
|
|
KTN-E73 |
755 |
430 |
257 |
214 |
172 |
131 |
|
|
KTN-E78 |
671 |
355 |
242 |
225 |
145 |
114 |
|
|
KTN-E79 |
611 |
324 |
265 |
214 |
140 |
111 |
|
|
Temporary Structure near Community Sports |
KTN-E142 |
598 |
400 |
253 |
199 |
162 |
125 |
|
Temporary Structure near Fung Kong |
KTN-E143 |
629 |
467 |
276 |
121 |
112 |
102 |
|
KTN-E145 |
686 |
493 |
301 |
214 |
183 |
140 |
|
|
KTN-E146 |
800 |
489 |
295 |
251 |
162 |
125 |
|
|
KTN-E148 |
788 |
439 |
271 |
229 |
136 |
111 |
|
|
Temporary Structure near Ma Tso Lung Road |
KTN-E149 |
696 |
381 |
244 |
228 |
146 |
109 |
|
KTN-E150 |
668 |
418 |
253 |
274 |
162 |
121 |
|
|
KTN-E151 |
669 |
392 |
245 |
244 |
168 |
124 |
|
|
Temporary Structure near Dills Corner Garden |
KTN-E157 |
608 |
300 |
231 |
229 |
135 |
111 |
|
KTN-E158 |
631 |
327 |
228 |
240 |
149 |
113 |
|
|
KTN-E159 |
519 |
343 |
214 |
132 |
120 |
107 |
|
|
Temporary Structure near Fanling Highway (near Pak
Shek Au) |
KTN-E162 |
509 |
411 |
315 |
135 |
117 |
104 |
|
KTN-E163 |
559 |
421 |
312 |
148 |
122 |
106 |
|
|
Temporary Structure at Pak Shek Au |
KTN-E165 |
618 |
358 |
256 |
267 |
151 |
114 |
|
KTN-E168 |
534 |
332 |
270 |
202 |
145 |
112 |
|
|
KTN-E170 |
512 |
401 |
296 |
203 |
151 |
113 |
|
|
KTN-E171 |
602 |
446 |
315 |
234 |
164 |
118 |
|
|
KTN-E172 |
679 |
451 |
317 |
197 |
129 |
107 |
|
|
KTN-E176 |
652 |
333 |
245 |
225 |
138 |
116 |
|
|
Temporary Structure near Tung Fong |
KTN-E189 |
800 |
367 |
229 |
224 |
160 |
122 |
|
KTN-E190 |
613 |
401 |
247 |
164 |
147 |
122 |
|
|
KTN-E193 |
516 |
461 |
315 |
129 |
123 |
105 |
|
|
KTN-E194 |
691 |
510 |
312 |
177 |
150 |
119 |
|
|
KTN-E195 |
732 |
510 |
306 |
160 |
134 |
113 |
|
|
Europa Garden Phase I |
KTN-E1003 |
519 |
433 |
282 |
160 |
146 |
121 |
Notes:
[1] Values
which exceed the required criterion of 500 µg/m3 for 1-hour TSP and
260 µg/m3 for 24-hour TSP are shown in bolded
[2] Values include background concentration: 73.1 µg/m3 of
TSP.
Table 3.36 – Tier
2 assessment - predicted cumulative 1-hour and 24-hour TSP concentrations at
1.5m above ground (including background concentration of 73.1μg/m3)
under mitigated scenario in KTN NDA in Year 2018.
|
Locations |
ASR |
1-hour TSP concentrations at various height (µg/m3) |
24-hourTSP concentrations at various height (µg/m3) |
||||
|
1.5m |
5m |
10m |
1.5m |
5m |
10m |
||
|
Existing
ASRs |
|||||||
|
Village Houses between Tung Kok and Tung Fong |
KTN-E53 |
204 |
170 |
126 |
102 |
97 |
87 |
|
KTN-E54 |
233 |
178 |
127 |
96 |
93 |
86 |
|
|
Temporary Structure at Tung Fong |
KTN-E55 |
414 |
187 |
120 |
165 |
107 |
89 |
|
KTN-E56 |
177 |
154 |
133 |
103 |
96 |
87 |
|
|
KTN-E57 |
175 |
166 |
136 |
87 |
86 |
83 |
|
|
KTN-E58 |
See Note [1] |
228 |
138 |
169 |
113 |
89 |
|
|
Temporary Structure at Pak Shek Au |
KTN-E61 |
425 |
245 |
160 |
154 |
112 |
91 |
|
KTN-E62 |
396 |
214 |
158 |
180 |
112 |
91 |
|
|
KTN-E63 |
467 |
218 |
136 |
140 |
101 |
88 |
|
|
KTN-E64 |
430 |
223 |
143 |
143 |
105 |
90 |
|
|
KTN-E65 |
426 |
213 |
147 |
185 |
110 |
93 |
|
|
KTN-E67 |
295 |
222 |
148 |
111 |
100 |
89 |
|
|
KTN-E68 |
272 |
208 |
143 |
110 |
100 |
88 |
|
|
KTN-E69 |
296 |
246 |
164 |
107 |
99 |
88 |
|
|
KTN-E70 |
382 |
278 |
164 |
114 |
99 |
87 |
|
|
KTN-E71 |
See Note [1] |
261 |
159 |
171 |
118 |
93 |
|
|
KTN-E73 |
208 |
190 |
140 |
92 |
90 |
85 |
|
|
KTN-E78 |
258 |
198 |
133 |
113 |
97 |
83 |
|
|
KTN-E79 |
291 |
215 |
143 |
90 |
88 |
84 |
|
|
Temporary Structure near Community Sports |
KTN-E142 |
301 |
192 |
140 |
116 |
92 |
84 |
|
Temporary Structure near Fung Kong |
KTN-E143 |
349 |
256 |
161 |
102 |
95 |
87 |
|
KTN-E145 |
433 |
298 |
174 |
143 |
114 |
93 |
|
|
KTN-E146 |
See Note [1] |
257 |
153 |
201 |
120 |
96 |
|
|
KTN-E148 |
See Note [1] |
268 |
169 |
201 |
117 |
94 |
|
|
Temporary Structure near Ma Tso Lung Road |
KTN-E149 |
See Note [1] |
323 |
184 |
212 |
130 |
99 |
|
KTN-E150 |
291 |
196 |
132 |
118 |
105 |
89 |
|
|
KTN-E151 |
304 |
191 |
128 |
108 |
96 |
87 |
|
|
Temporary Structure near Dills Corner Garden |
KTN-E157 |
163 |
160 |
138 |
88 |
87 |
84 |
|
KTN-E158 |
148 |
148 |
131 |
93 |
88 |
83 |
|
|
KTN-E159 |
156 |
140 |
125 |
86 |
83 |
81 |
|
|
Temporary Structure near Fanling Highway (near Pak
Shek Au) |
KTN-E162 |
350 |
244 |
170 |
106 |
94 |
85 |
|
KTN-E163 |
395 |
250 |
164 |
115 |
95 |
85 |
|
|
Temporary Structure at Pak Shek Au |
KTN-E165 |
498 |
241 |
150 |
158 |
110 |
93 |
|
KTN-E168 |
238 |
197 |
131 |
89 |
86 |
83 |
|
|
KTN-E170 |
391 |
248 |
156 |
141 |
106 |
91 |
|
|
KTN-E171 |
461 |
253 |
152 |
182 |
120 |
93 |
|
|
KTN-E172 |
457 |
216 |
135 |
178 |
108 |
91 |
|
|
KTN-E176 |
262 |
206 |
140 |
87 |
85 |
83 |
|
|
Temporary Structure near Tung Fong |
KTN-E189 |
425 |
176 |
117 |
150 |
105 |
87 |
|
KTN-E190 |
268 |
173 |
126 |
109 |
98 |
87 |
|
|
KTN-E193 |
240 |
206 |
142 |
102 |
98 |
89 |
|
|
KTN-E194 |
373 |
211 |
141 |
136 |
111 |
94 |
|
|
KTN-E195 |
368 |
211 |
147 |
125 |
105 |
92 |
|
|
Europa Garden Phase I |
KTN-E1003 |
197 |
157 |
125 |
98 |
91 |
83 |
Notes:
[1] ASR does not exist
during the construction period.
[2] Values include background concentration: 73.1 µg/m3 of
TSP.
Table 3.37 –
Long term assessment - predicted cumulative annual TSP concentrations at 1.5m
above ground (including background concentration of 73.1μg/m3)
under mitigated scenario in KTN NDA in Year 2018.
|
Locations |
ASR |
Annual TSP concentrations at various height (µg/m3) |
||
|
1.5m |
5m |
10m |
||
|
Existing
ASRs |
||||
|
Village Houses between Tung Kok and Tung Fong |
KTN-E53 |
74.3 |
74.1 |
73.7 |
|
KTN-E54 |
74.5 |
74.2 |
73.8 |
|
|
Temporary Structure at Tung Fong |
KTN-E55 |
77.2 |
75.2 |
74.2 |
|
KTN-E56 |
78.1 |
75.7 |
74.5 |
|
|
KTN-E57 |
74.9 |
74.5 |
74.0 |
|
|
KTN-E58 |
75.8 |
74.3 |
73.8 |
|
|
Temporary Structure at Pak Shek Au |
KTN-E61 |
75.3 |
74.5 |
73.9 |
|
KTN-E62 |
76.2 |
74.8 |
74.0 |
|
|
KTN-E63 |
76.2 |
74.7 |
74.0 |
|
|
KTN-E64 |
76.1 |
74.7 |
74.0 |
|
|
KTN-E65 |
76.7 |
74.8 |
74.0 |
|
|
KTN-E67 |
75.7 |
74.4 |
73.8 |
|
|
KTN-E68 |
75.3 |
74.3 |
73.8 |
|
|
KTN-E69 |
76.1 |
74.5 |
73.8 |
|
|
KTN-E70 |
74.5 |
74.2 |
73.8 |
|
|
KTN-E71 |
75.7 |
74.6 |
73.9 |
|
|
KTN-E73 |
74.9 |
74.5 |
74.0 |
|
|
KTN-E78 |
75.7 |
74.4 |
73.8 |
|
|
KTN-E79 |
75.7 |
74.5 |
73.9 |
|
|
Temporary Structure near Community Sports |
KTN-E142 |
75.2 |
74.6 |
74.1 |
|
Temporary Structure near Fung Kong |
KTN-E143 |
73.4 |
73.4 |
73.3 |
|
KTN-E145 |
74.8 |
74.3 |
73.8 |
|
|
Open Storage near Fung Kong |
KTN-E146 |
75.9 |
74.2 |
73.6 |
|
Temporary Structure near Fung Kong |
KTN-E148 |
76.6 |
74.2 |
73.6 |
|
Temporary Structure near Ma Tso Lung Road |
KTN-E149 |
75.0 |
73.8 |
73.4 |
|
KTN-E150 |
77.6 |
75.3 |
74.2 |
|
|
KTN-E151 |
76.7 |
75.4 |
74.4 |
|
|
Temporary Structure near Dills Corner Garden |
KTN-E157 |
74.5 |
73.8 |
73.5 |
|
KTN-E158 |
74.5 |
73.8 |
73.5 |
|
|
KTN-E159 |
73.5 |
73.5 |
73.4 |
|
|
Temporary Structure near Fanling Highway (near Pak
Shek Au) |
KTN-E162 |
73.9 |
73.8 |
73.6 |
|
KTN-E163 |
74.4 |
73.9 |
73.6 |
|
|
Temporary Structure at Pak Shek Au |
KTN-E165 |
76.6 |
74.7 |
74.0 |
|
KTN-E168 |
74.7 |
74.2 |
73.8 |
|
|
KTN-E170 |
75.0 |
74.3 |
73.8 |
|
|
KTN-E171 |
75.5 |
74.5 |
73.9 |
|
|
KTN-E172 |
75.6 |
74.3 |
73.8 |
|
|
KTN-E176 |
76.1 |
74.6 |
73.9 |
|
|
Temporary Structure near Tung Fong |
KTN-E189 |
74.7 |
74.2 |
73.8 |
|
KTN-E190 |
73.9 |
73.8 |
73.6 |
|
|
KTN-E193 |
73.4 |
73.4 |
73.3 |
|
|
KTN-E194 |
73.8 |
73.7 |
73.5 |
|
|
KTN-E195 |
73.7 |
73.6 |
73.4 |
|
|
Europa Garden Phase I |
KTN-E1003 |
73.8 |
73.7 |
73.5 |
Notes:
[1] Values include background concentration:
73.1 µg/m3 of TSP.
Short-term Assessment (Tier 1) for Year
2028
The maximum 1-hour and 24-hour TSP concentrations from Tier 1 screening assessment have been predicted. Appendix 3.13 shows the assessment results and Table 3.38 below summarises the cumulative 1-hour and 24-hour TSP impact (Tier 1) at the ASRs concerned. The results indicate that, for the majority of ASRs, exceedance of 1-hour and 24-hour TSP criteria is not anticipated even with this theoretical worst case situation where the entire worksites were assumed active (i.e. 100%). However, for the ASRs near the work sites (e.g. Castle Peak Road and Lo Wu Firing Range), exceedance of 1-hour and 24-hour TSP criterion is still predicted. As the Tier 1 assessment is for screening purposes only and does not reflect the actual on-site activities, a more focused Tier 2 assessment has been undertaken. Figure 3.68 and Figure 3.69 show the contours of Tier 1 1-hour and 24-hour TSP concentrations.
Short-term Assessment (Tier 2) for Year 2028
A more focused Tier 2 assessment has been conducted with the assumed 15% active works areas for the adjacent construction site positioned nearest to the potentially worst affected ASRs. As mentioned in Section 3.6.1.6, the Tier 2 assessment is also very conservative and will lead to over prediction of the dust impacts.
The maximum 1-hour and 24-hour TSP concentrations from Tier 2 screening assessment have been predicted. Appendix 3.14 shows the assessment results and Table 3.39 below summarises the cumulative 1-hour and 24-hour TSP impact (Tier 2) at the ASRs concerned. 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.
Contours have been presented in Figure 3.70 and Figure 3.71 for 1-hour (Tier 2) and 24-hour (Tier 2) TSP concentrations at 1.5m above ground to illustrate the short-term dust impact on the ASR.
Long-term Assessment for Year 2028
The annual TSP concentrations from long-term assessment have
been predicted. Appendix 3.13 shows the assessment results and Table
3.40 below summarises the
cumulative annual TSP impact at the ASRs concerned. In summary, the predicted
annual TSP concentrations at all ASRs would comply with the criterion of 80µg/m3, and therefore no adverse
long-term impact is anticipated. Contour of annual TSP concentrations at 1.5m
above ground is shown in Figure
3.72.
Table 3.38 –
Tier 1 assessment – predicted cumulative 1-hour and 24-hour TSP concentrations
at 1.5m above ground (including background concentration of 73.1μg/m3)
under mitigated scenario in KTN NDA in Year 2028.
|
Locations |
ASR |
1-hour TSP concentrations at various height (µg/m3) |
24-hourTSP concentrations at various height (µg/m3) |
||||
|
1.5m |
5m |
10m |
1.5m |
5m |
10m |
||
|
Existing
ASRs |
|||||||
|
Temporary Structure near Castle Peak Road |
KTN-E90 |
519 |
309 |
200 |
196 |
118 |
90 |
|
Lo Wu Firing Range (Eastern) |
KTN-E123 |
580 |
413 |
244 |
194 |
161 |
119 |
|
Ma Tso Lung San Tsuen |
KTN-E209 |
575 |
375 |
227 |
112 |
96 |
85 |
|
Europa Garden Phase I |
KTN-E1003 |
671 |
355 |
260 |
154 |
107 |
97 |
|
Valais Phase 1 |
KTN-E1005 |
865 |
497 |
296 |
274 |
198 |
142 |
|
KTN-E1006 |
690 |
499 |
296 |
224 |
174 |
135 |
|
|
KTN-E1007 |
568 |
482 |
311 |
164 |
153 |
129 |
|
|
St Paul's House of Prayer |
KTN-E1009 |
546 |
295 |
188 |
158 |
116 |
96 |
|
Kam Tsin Village Ho Tung School |
KTN-E1010 |
521 |
294 |
190 |
160 |
115 |
96 |
|
Scattered Village Houses at Northern Boundary of
KTN |
KTN-E1017 |
641 |
395 |
236 |
127 |
109 |
93 |
|
KTN-E1018 |
709 |
443 |
272 |
165 |
130 |
105 |
|
|
Planned ASRs |
|||||||
|
Nursery Classes and Kindergartens; Post Offices |
KTN-23 |
547 |
424 |
253 |
156 |
140 |
115 |
|
KTN-24 |
586 |
415 |
259 |
164 |
143 |
116 |
|
|
KTN-25 |
593 |
412 |
250 |
166 |
143 |
116 |
|
|
KTN-26 |
612 |
429 |
261 |
172 |
143 |
114 |
|
|
KTN-27 |
526 |
407 |
256 |
156 |
136 |
112 |
|
|
Sports Centre, District Library, Integrated Children
and Youth Services Centre and Family Service Centre; Integrated Community
Centre for Mental Wellness, Child Care Centre and Social Security Field Unit |
KTN-234 |
591 |
413 |
224 |
159 |
137 |
112 |
|
KTN-235 |
623 |
403 |
242 |
160 |
135 |
109 |
|
|
Reprovision Site of Kwu Tung Vegetable Marketing
and Credit Co-operative Society |
KTN-271 |
549 |
323 |
184 |
157 |
119 |
96 |
|
Government Reserve |
KTN-315 |
617 |
359 |
241 |
221 |
140 |
110 |
|
KTN-316 |
587 |
352 |
245 |
223 |
145 |
115 |
|
|
KTN-318 |
586 |
373 |
248 |
173 |
138 |
114 |
|
|
KTN-319 |
561 |
339 |
243 |
162 |
127 |
107 |
|
|
Sports Ground/Sports Complex |
KTN-391 |
678 |
399 |
242 |
216 |
141 |
112 |
|
KTN-392 |
762 |
432 |
263 |
220 |
140 |
108 |
|
|
KTN-393 |
706 |
378 |
230 |
239 |
153 |
114 |
|
|
KTN-394 |
651 |
315 |
205 |
252 |
150 |
112 |
|
|
Reserve for Supporting Lok Ma Chau Loop
Development |
KTN-395 |
787 |
449 |
247 |
185 |
127 |
99 |
|
KTN-396 |
672 |
388 |
227 |
221 |
140 |
106 |
|
|
KTN-397 |
725 |
345 |
214 |
233 |
145 |
108 |
|
|
KTN-398 |
697 |
318 |
190 |
271 |
162 |
115 |
|
|
KTN-399 |
740 |
328 |
210 |
291 |
158 |
113 |
|
|
KTN-400 |
713 |
379 |
237 |
276 |
172 |
120 |
|
|
KTN-401 |
591 |
266 |
183 |
213 |
134 |
101 |
|
|
KTN-402 |
688 |
320 |
211 |
184 |
117 |
93 |
|
|
KTN-403 |
665 |
334 |
207 |
169 |
108 |
88 |
|
|
KTN-404 |
630 |
314 |
205 |
176 |
107 |
90 |
|
|
KTN-405 |
691 |
369 |
229 |
184 |
118 |
95 |
|
|
KTN-406 |
667 |
371 |
236 |
186 |
123 |
96 |
|
|
KTN-407 |
629 |
329 |
201 |
190 |
136 |
103 |
|
|
Disused School (Potential for Eco-tourism
Education Centre, Holiday Camping or Other Recreational Uses) |
KTN-408 |
506 |
344 |
216 |
149 |
116 |
93 |
|
KTN-409 |
613 |
320 |
198 |
167 |
118 |
93 |
|
|
KTN-410 |
633 |
313 |
200 |
162 |
123 |
98 |
|
|
KTN-411 |
686 |
343 |
213 |
177 |
126 |
98 |
|
Notes:
[1] Values
which exceed the required criterion of 500 µg/m3 for 1-hour TSP and
260 µg/m3 for 24-hour TSP are shown in bolded
[2] Values include background concentration: 73.1 µg/m3 of
TSP.
|
Locations |
ASR |
1-hour TSP concentrations at various height (µg/m3) |
24-hourTSP concentrations at various height (µg/m3) |
||||
|
1.5m |
5m |
10m |
1.5m |
5m |
10m |
||
|
Existing
ASRs |
|||||||
|
Temporary Structure near Castle Peak Road |
KTN-E90 |
422 |
231 |
142 |
154 |
89 |
79 |
|
Lo Wu Firing Range (Eastern) |
KTN-E123 |
276 |
183 |
145 |
112 |
100 |
87 |
|
Ma Tso Lung San Tsuen |
KTN-E209 |
246 |
165 |
109 |
89 |
82 |
77 |
|
Europa Garden Phase I |
KTN-E1003 |
330 |
149 |
106 |
94 |
84 |
79 |
|
Valais Phase 1 |
KTN-E1005 |
429 |
170 |
141 |
152 |
99 |
90 |
|
KTN-E1006 |
266 |
171 |
119 |
113 |
98 |
85 |
|
|
KTN-E1007 |
168 |
140 |
108 |
88 |
86 |
81 |
|
|
St Paul's House of Prayer |
KTN-E1009 |
369 |
177 |
114 |
148 |
102 |
85 |
|
Kam Tsin Village Ho Tung School |
KTN-E1010 |
343 |
190 |
134 |
105 |
91 |
82 |
|
Scattered Village Houses at Northern Boundary of
KTN |
KTN-E1017 |
412 |
209 |
137 |
96 |
84 |
78 |
|
KTN-E1018 |
256 |
161 |
123 |
106 |
89 |
81 |
|
|
Planned ASRs |
|||||||
|
Nursery Classes and Kindergartens; Post Offices |
KTN-23 |
191 |
166 |
116 |
95 |
88 |
82 |
|
KTN-24 |
211 |
172 |
112 |
97 |
89 |
83 |
|
|
KTN-25 |
252 |
175 |
117 |
105 |
96 |
84 |
|
|
KTN-26 |
334 |
167 |
116 |
122 |
98 |
84 |
|
|
KTN-27 |
282 |
146 |
112 |
110 |
92 |
82 |
|
|
Sports Centre, District Library, Integrated
Children and Youth Services Centre and Family Service Centre; Integrated
Community Centre for Mental Wellness, Child Care Centre and Social Security
Field Unit |
KTN-234 |
227 |
173 |
123 |
102 |
89 |
83 |
|
KTN-235 |
219 |
178 |
127 |
99 |
89 |
83 |
|
|
Reprovision Site of Kwu Tung Vegetable Marketing
and Credit Co-operative Society |
KTN-271 |
292 |
177 |
121 |
132 |
103 |
86 |
|
Government Reserve |
KTN-315 |
209 |
169 |
124 |
94 |
89 |
83 |
|
KTN-316 |
293 |
180 |
130 |
122 |
95 |
84 |
|
|
KTN-318 |
257 |
188 |
136 |
109 |
90 |
83 |
|
|
KTN-319 |
236 |
152 |
124 |
109 |
87 |
83 |
|
|
Sports Ground/Sports Complex |
KTN-391 |
145 |
139 |
115 |
83 |
82 |
80 |
|
KTN-392 |
215 |
156 |
119 |
93 |
86 |
82 |
|
|
KTN-393 |
174 |
155 |
121 |
88 |
86 |
81 |
|
|
KTN-394 |
121 |
113 |
103 |
81 |
80 |
79 |
|
|
Reserve for Supporting Lok Ma Chau Loop
Development |
KTN-395 |
279 |
192 |
141 |
106 |
95 |
84 |
|
KTN-396 |
234 |
175 |
124 |
101 |
93 |
84 |
|
|
KTN-397 |
280 |
165 |
123 |
107 |
94 |
85 |
|
|
KTN-398 |
218 |
169 |
123 |
97 |
91 |
83 |
|
|
KTN-399 |
314 |
203 |
128 |
123 |
103 |
86 |
|
|
KTN-400 |
407 |
234 |
140 |
163 |
114 |
91 |
|
|
KTN-401 |
278 |
189 |
119 |
119 |
96 |
84 |
|
|
KTN-402 |
221 |
127 |
101 |
132 |
88 |
80 |
|
|
KTN-403 |
256 |
164 |
107 |
113 |
88 |
79 |
|
|
KTN-404 |
230 |
142 |
104 |
115 |
87 |
78 |
|
|
KTN-405 |
387 |
183 |
113 |
156 |
94 |
81 |
|
|
KTN-406 |
See Note [1] |
See Note [1] |
See Note [1] |
See Note [1] |
See Note [1] |
See Note [1] |
|
|
KTN-407 |
463 |
211 |
123 |
148 |
102 |
86 |
|
|
Disused School (Potential for Eco-tourism
Education Centre, Holiday Camping or Other Recreational Uses) |
KTN-408 |
434 |
178 |
123 |
119 |
93 |
81 |
|
KTN-409 |
266 |
187 |
112 |
109 |
91 |
81 |
|
|
KTN-410 |
368 |
183 |
119 |
122 |
94 |
82 |
|
|
KTN-411 |
417 |
180 |
115 |
166 |
100 |
83 |
|
Notes:
[1] ASR does not exist
during the construction period.
[2] Values include background concentration: 73.1 µg/m3 of
TSP.
Table 3.40 –
Long term assessment - predicted cumulative annual TSP concentrations at 1.5m
above ground (including background concentration of 73.1μg/m3)
under mitigated scenario in KTN NDA in Year 2028.
|
Locations |
ASR |
Annual TSP concentrations at various height (µg/m3) |
||
|
1.5m |
5m |
10m |
||
|
Existing
ASRs |
||||
|
Temporary Structure near Castle Peak Road |
KTN-E90 |
74.7 |
73.8 |
73.4 |
|
Lo Wu Firing Range (Eastern) |
KTN-E123 |
73.3 |
73.3 |
73.2 |
|
Ma Tso Lung San Tsuen |
KTN-E209 |
73.1 |
73.1 |
73.1 |
|
Europa Garden Phase I |
KTN-E1003 |
73.6 |
73.4 |
73.3 |
|
Valais Phase 1 |
KTN-E1005 |
73.9 |
73.6 |
73.5 |
|
KTN-E1006 |
74.1 |
73.8 |
73.6 |
|
|
KTN-E1007 |
73.7 |
73.6 |
73.5 |
|
|
St Paul's House of Prayer |
KTN-E1009 |
74.3 |
73.8 |
73.5 |
|
Kam Tsin Village Ho Tung School |
KTN-E1010 |
74.4 |
73.8 |
73.5 |
|
Golf Parkview |
KTN-E1017 |
73.2 |
73.1 |
73.1 |
|
Scattered Village Houses at Northern Boundary of
KTN |
KTN-E1018 |
73.2 |
73.2 |
73.2 |
|
Planned ASRs |
||||
|
Nursery Classes and Kindergartens; Post Offices; |
KTN-23 |
73.4 |
73.4 |
73.3 |
|
KTN-24 |
73.4 |
73.4 |
73.3 |
|
|
KTN-25 |
73.4 |
73.4 |
73.3 |
|
|
KTN-26 |
73.4 |
73.4 |
73.3 |
|
|
KTN-27 |
73.4 |
73.3 |
73.3 |
|
|
KTN-234 |
73.4 |
73.4 |
73.3 |
|
|
KTN-235 |
73.5 |
73.5 |
73.4 |
|
|
KTN-271 |
74.3 |
73.9 |
73.5 |
|
|
Nursery Classes and Kindergartens (2 nos);
District Elderly Community Centre |
KTN-315 |
73.4 |
73.2 |
73.2 |
|
KTN-316 |
73.5 |
73.3 |
73.2 |
|
|
Sports Centre, District Library, Integrated
Children and Youth Services Centre and Family Service Centre; Integrated
Community Centre for Mental Wellness, Child Care Centre and Social Security
Field Unit |
KTN-318 |
73.3 |
73.3 |
73.2 |
|
KTN-319 |
73.3 |
73.2 |
73.2 |
|
|
Reprovision Site of Kwu Tung Vegetable Marketing
and Credit Co-operative Society |
KTN-391 |
73.4 |
73.3 |
73.2 |
|
Government Reserve |
KTN-392 |
73.4 |
73.2 |
73.2 |
|
KTN-393 |
73.6 |
73.3 |
73.2 |
|
|
KTN-394 |
73.5 |
73.3 |
73.2 |
|
|
KTN-395 |
73.4 |
73.2 |
73.2 |
|
|
Sports Ground/Sports Complex |
KTN-396 |
73.5 |
73.3 |
73.2 |
|
KTN-397 |
73.6 |
73.3 |
73.2 |
|
|
KTN-398 |
73.6 |
73.4 |
73.2 |
|
|
KTN-399 |
73.6 |
73.3 |
73.2 |
|
|
Reserve for Supporting Lok Ma Chau Loop
Development |
KTN-400 |
73.5 |
73.3 |
73.2 |
|
KTN-401 |
73.5 |
73.3 |
73.2 |
|
|
KTN-402 |
73.4 |
73.2 |
73.1 |
|
|
KTN-403 |
73.3 |
73.2 |
73.1 |
|
|
KTN-404 |
73.3 |
73.2 |
73.1 |
|
|
KTN-405 |
73.4 |
73.2 |
73.1 |
|
|
KTN-406 |
73.3 |
73.2 |
73.1 |
|
|
KTN-407 |
73.3 |
73.2 |
73.2 |
|
|
KTN-408 |
73.2 |
73.2 |
73.1 |
|
|
KTN-409 |
73.3 |
73.2 |
73.1 |
|
|
KTN-410 |
73.3 |
73.2 |
73.2 |
|
|
KTN-411 |
73.4 |
73.2 |
73.2 |
|
Note:
[1] Values include background
concentration: 73.1 µg/m3
of TSP.
3.8.1.2 Assessment Results – Mitigated Scenarios for
FLN NDA
Short-term
Assessment (Tier 1) for Worst Case Scenario – Year 2025
The maximum 1-hour and 24-hour TSP concentrations from Tier 1 screening assessment have been predicted. Appendix 3.13 shows the assessment results and Table 3.41 below summarises the cumulative 1-hour and 24-hour TSP impact (Tier 1) at the ASRs concerned. The results indicate that for the majority of ASRs, exceedance of 1-hour and 24-hour TSP criteria is not anticipated even with this theoretical worst case situation where the entire worksites were assumed active (i.e. 100%). However, for the ASRs near the work sites (e.g. scattered village houses north of proposed town-park, On Kwok Villa, etc.), exceedance of 1-hour TSP criterion is still predicted. As the Tier 1 assessment is for screening purposes only and does not reflect the actual on-site activities, a more focused Tier 2 assessment has been undertaken.
Figures 3.83 and Figure 3.84 show the contours of Tier 1 1-hour and 24-hour TSP concentrations at 1.5m above ground.
Short-term Assessment
(Tier 2) for Worst Case Scenario – Year 2025
A more focused Tier 2 assessment has been conducted with the assumed 15% active works areas for the adjacent construction site positioned nearest to the potentially worst affected ASRs. As mentioned in Section 3.5.1.5, the Tier 2 assessment is also very conservative and will lead to over prediction of the dust impacts.
The maximum 1-hour and 24-hour TSP concentrations from Tier 2 screening assessment have been predicted. Appendix 3.14 shows the assessment results and Table 3.42 below summarizes the cumulative 1-hour and 24-hour TSP impact (Tier 2) at the ASRs concerned. 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.
Contours have been presented in Figures
3.85 and Figure 3.86
for Tier 2 1-hour and 24-hour TSP concentrations at 1.5m above ground to illustrate the
short-term dust impact on the ASR.
Long-term Assessment for Worst Case Scenario – Year 2025
The annual TSP concentrations from long-term assessment have
been predicted. Appendix 3.13 shows the assessment results and Table
3.43 below
summarises the cumulative annual TSP impact at the ASRs concerned. In summary,
the predicted annual TSP concentrations at all ASRs would comply with the
criterion of 80µg/m3,
and therefore no adverse long-term impact is anticipated. Contours of annual
TSP concentrations at 1.5m above ground are shown in Figure
3.87.
Table
3.41 – Tier 1
assessment – predicted cumulative 1-hour and 24-hour TSP
concentrations at 1.5m above ground (including background concentration of
73.1μg/m3) under mitigated scenario in FLN NDA in Year 2025.
|
Locations |
ASR |
1-hour TSP concentrations at
various height (µg/m3) |
24-hourTSP concentrations at various
height (µg/m3) |
||||
|
1.5m |
5m |
10m |
1.5m |
5m |
10m |
||
|
Existing ASRs |
|||||||
|
Scattered Village Houses North of Proposed
Potential Town-park |
FLN-E62 |
630 |
383 |
274 |
158 |
108 |
97 |
|
On Kwok Villa |
FLN-E123 |
576 |
414 |
250 |
189 |
149 |
119 |
|
Noble Hill |
FLN-E124 |
628 |
434 |
281 |
203 |
163 |
129 |
|
Scattered Village Houses East of Good View New
Village |
FLN-E126 |
546 |
465 |
318 |
167 |
151 |
125 |
|
Planned ASRs |
|||||||
|
Police Driving and Traffic Training Division |
FLN-5 |
511 |
445 |
328 |
176 |
150 |
120 |
|
Weapons Training Division |
FLN-20 |
511 |
375 |
263 |
163 |
134 |
113 |
|
FLN-21 |
560 |
417 |
287 |
160 |
132 |
113 |
|
|
FLN-22 |
604 |
446 |
322 |
192 |
150 |
120 |
|
|
Village Resite |
FLN-35 |
612 |
377 |
262 |
194 |
142 |
109 |
|
FLN-36 |
502 |
377 |
273 |
152 |
133 |
109 |
|
|
Residential Buildings, Nursery Classes and
Kindergartens, Neighbourhood Elderly Community Centre, Residential Home for the Elderly, Post
Office |
FLN-243 |
512 |
411 |
250 |
113 |
104 |
90 |
Notes:
[1] Values
which exceed the required criterion of 500 µg/m3 for 1-hour TSP and
260 µg/m3 for 24-hour TSP are shown in bolded
[2] Values include background concentration: 73.1 µg/m3 of
TSP.
Table
3.42 - Tier 2 assessment - predicted cumulative 1-hour and
24-hour TSP concentrations at 1.5m above ground (including background
concentration of 73.1μg/m3) under mitigated scenario for
existing ASRs in FLN NDA in Year 2025.
|
Locations |
ASR |
1-hour TSP concentrations at
various height (µg/m3) |
24-hourTSP concentrations at
various height (µg/m3) |
||||
|
1.5m |
5m |
10m |
1.5m |
5m |
10m |
||
|
Existing ASRs |
|||||||
|
Scattered Village Houses North of Proposed
Potential Town-park |
FLN-E62 |
487 |
286 |
214 |
124 |
94 |
87 |
|
On Kwok Villa |
FLN-E123 |
352 |
277 |
237 |
113 |
103 |
95 |
|
Noble Hill |
FLN-E124 |
408 |
281 |
215 |
151 |
122 |
101 |
|
Scattered Village Houses East of Good View New
Village |
FLN-E126 |
325 |
292 |
202 |
109 |
99 |
90 |
|
Planned ASRs |
|||||||
|
Police Driving and Traffic Training Division |
FLN-5 |
240 |
219 |
181 |
108 |
101 |
92 |
|
Weapons Training Division Weapons Training Division |
FLN-20 |
294 |
236 |
201 |
117 |
107 |
93 |
|
FLN-21 |
309 |
228 |
196 |
124 |
109 |
95 |
|
|
FLN-22 |
335 |
245 |
203 |
130 |
111 |
96 |
|
|
Village Resite |
FLN-35 |
404 |
331 |
216 |
147 |
111 |
95 |
|
FLN-36 |
324 |
287 |
200 |
120 |
109 |
96 |
|
|
Residential Buildings, Nursery Classes and Kindergartens,
Neighbourhood Elderly Community Centre,
Residential Home for the Elderly, Post Office |
FLN-243 |
337 |
315 |
234 |
87 |
86 |
82 |
Note:
[1] Values include background
concentration: 73.1 µg/m3
of TSP
Table
3.43 – Long term assessment - predicted cumulative annual
TSP concentrations at 1.5m above ground (including background concentration of
73.1μg/m3) under mitigated scenario in FLN NDA in Year 2025.
|
Locations |
ASR |
Annual TSP concentrations at various height (µg/m3) |
||
|
1.5m |
5m |
10m |
||
|
Existing ASRs |
|
|||
|
Scattered Village Houses North of Proposed
Potential Town-park |
FLN-E62 |
74.3 |
73.7 |
73.5 |
|
On Kwok Villa |
FLN-E123 |
73.6 |
73.6 |
73.5 |
|
Noble Hill |
FLN-E124 |
73.7 |
73.6 |
73.4 |
|
Scattered Village Houses East of Good View New
Village |
FLN-E126 |
73.5 |
73.5 |
73.4 |
|
Planned ASRs |
|
|||
|
Police Driving and Traffic Training Division |
FLN-5 |
74.4 |
74.1 |
73.7 |
|
Weapons Training Division |
FLN-20 |
74.4 |
74.1 |
73.8 |
|
FLN-21 |
74.6 |
74.2 |
73.8 |
|
|
FLN-22 |
74.9 |
74.3 |
73.9 |
|
|
Village Resite |
FLN-35 |
73.7 |
73.4 |
73.3 |
|
FLN-36 |
73.5 |
73.4 |
73.3 |
|
|
Residential Buildings, Nursery Classes and
Kindergartens, Neighbourhood Elderly Community Centre, Residential Home for the Elderly, Post
Office |
FLN-243 |
73.3 |
73.3 |
73.2 |
Note:
[1] Values include background concentration:
73.1 µg/m3 of TSP
Short-term
Assessment (Tier 1) for Year 2018
The maximum 1-hour and 24-hour TSP concentrations from Tier 1 screening assessment have been predicted. Appendix 3.13 shows the assessment results and Table 3.44 below summarises the cumulative 1-hour and 24-hour TSP impact (Tier 1) at the ASRs concerned. The results indicate that, for the majority of ASRs, exceedance of 1-hour and 24-hour TSP criteria is not anticipated even with this theoretical worst case situation where the entire worksites were assumed active (i.e. 100%). However, for the ASRs near the work sites (i.e. village houses at Fu Tei Au Tsuen (Eastern)), exceedance of 1-hour TSP criterion is still predicted. As the Tier 1 assessment is for screening purposes only and does not reflect the actual on-site activities, a more focused Tier 2 assessment has been undertaken. Figures 3.73 and Figure 3.74 show the contours of Tier 1 1-hour and 24-hour TSP concentrations at 1.5m above ground.
Short-term Assessment (Tier 2) for Year 2018
A more focused Tier 2 assessment has been conducted with the assumed 15% active works areas for the adjacent construction site positioned nearest to the potentially worst affected ASRs. As mentioned in Section 3.5.1.5, the Tier 2 assessment is also very conservative and will lead to over prediction of the dust impacts.
The maximum 1-hour and 24-hour TSP concentrations from Tier 2 screening assessment have been predicted. Appendix 3.14 shows the assessment results and Table 3.45 below summarises the cumulative 1-hour and 24-hour TSP impact (Tier 2) at the ASRs concerned. 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.
Contours have been presented in Figures
3.75 and Figure 3.76
for Tier 2 1-hour and 24-hour TSP
concentrations at 1.5m above ground to illustrate the short-term dust impact on
the ASR.
Long-term Assessment for Year 2018
The annual TSP concentrations from long-term assessment have
been predicted. Appendix 3.13 shows the assessment results and Table
3.46 below summarises the
cumulative annual TSP impact at the ASRs concerned. In summary, the predicted
annual TSP concentrations at all ASRs would comply with the criterion of 80µg/m3, and therefore no
adverse long-term impact is anticipated. Contours of annual TSP concentrations
at 1.5m above ground are shown in Figure 3.77.
Table 3.44 – Tier 1 assessment – predicted cumulative 1-hour and
24-hour TSP concentrations at 1.5m above ground (including background
concentration of 73.1μg/m3) under mitigated scenario in FLN NDA
in Year 2018.
|
Locations |
ASR |
1-hour TSP concentrations at
various height (µg/m3) |
24-hour TSP concentrations
at various height (µg/m3) |
||||
|
1.5m |
5m |
10m |
1.5m |
5m |
10m |
||
|
Existing ASRs |
|||||||
|
Village Houses at Fu Tei Au Tsuen (Eastern) |
FLN-E15 |
625 |
299 |
180 |
155 |
120 |
99 |
|
FLN-E16 |
617 |
252 |
162 |
228 |
130 |
101 |
|
|
FLN-E17 |
540 |
249 |
159 |
229 |
130 |
102 |
|
|
FLN-E18 |
612 |
283 |
183 |
234 |
144 |
102 |
|
|
FLN-E19 |
641 |
317 |
196 |
223 |
141 |
103 |
|
|
FLN-E20 |
613 |
261 |
167 |
228 |
138 |
100 |
|
|
FLN-E22 |
539 |
231 |
142 |
220 |
126 |
97 |
|
|
FLN-E23 |
610 |
286 |
178 |
233 |
141 |
104 |
|
|
FLN-E28 |
531 |
264 |
170 |
193 |
132 |
98 |
|
Notes:
[1] Values
which exceed the required criterion of 500 µg/m3 for 1-hour TSP and
260 µg/m3 for 24-hour TSP are shown in bolded
[2] Values include background concentration: 73.1 µg/m3 of
TSP.
Table 3.45 – Tier 2 assessment – Predicted cumulative 1-hour
and 24-hour TSP concentrations at 1.5m above ground (including background
concentration of 73.1μg/m3) under mitigated scenario in FLN NDA in Year
2018.
|
Locations |
ASR |
1-hour TSP concentrations at
various height (µg/m3) |
24-hour TSP concentrations at various
height (µg/m3) |
||||
|
1.5m |
5m |
10m |
1.5m |
5m |
10m |
||
|
Existing ASRs |
|||||||
|
Village Houses at Fu Tei Au Tsuen (Eastern) |
FLN-E15 |
116 |
111 |
95 |
75 |
75 |
74 |
|
FLN-E16 |
126 |
117 |
94 |
77 |
76 |
75 |
|
|
FLN-E17 |
159 |
131 |
98 |
81 |
79 |
77 |
|
|
FLN-E18 |
317 |
142 |
105 |
131 |
94 |
82 |
|
|
FLN-E19 |
371 |
152 |
105 |
152 |
96 |
81 |
|
|
FLN-E20 |
404 |
162 |
103 |
152 |
97 |
81 |
|
|
FLN-E22 |
147 |
124 |
99 |
78 |
77 |
75 |
|
|
FLN-E23 |
339 |
134 |
95 |
146 |
91 |
78 |
|
|
FLN-E28 |
255 |
173 |
111 |
90 |
85 |
79 |
|
Note:
[1] Values
include background concentration: 73.1 µg/m3 of
TSP
Table
3.46 – Long term
assessment - predicted cumulative annual TSP concentrations at 1.5m above
ground (including background concentration of 73.1μg/m3) under
mitigated scenario in FLN NDA in Year 2018.
|
Locations |
ASR |
Annual TSP concentrations at various height (µg/m3) |
||
|
1.5m |
5m |
10m |
||
|
Existing ASRs |
|
|||
|
Village Houses at Fu Tei Au Tsuen (Eastern) |
FLN-E15 |
73.5 |
73.4 |
73.2 |
|
FLN-E16 |
74.6 |
73.6 |
73.3 |
|
|
FLN-E17 |
75.1 |
73.8 |
73.4 |
|
|
FLN-E18 |
75.3 |
73.9 |
73.4 |
|
|
FLN-E19 |
74.7 |
73.8 |
73.5 |
|
|
FLN-E20 |
75.3 |
74.0 |
73.5 |
|
|
FLN-E22 |
75.4 |
74.0 |
73.5 |
|
|
FLN-E23 |
75.3 |
74.0 |
73.5 |
|
|
FLN-E28 |
74.4 |
73.9 |
73.5 |
|
Note:
[1] Values include background concentration:
73.1 µg/m3 of TSP.
Short-term
Assessment (Tier 1) for Year 2021
The maximum 1-hour and 24-hour TSP concentrations from Tier 1 screening assessment have been predicted. Appendix 3.13 shows the assessment results and Table 3.47 below summarises the cumulative 1-hour and 24-hour TSP impact (Tier 1) at the ASRs concerned. The results indicate that for the majority of ASRs, exceedance of 1-hour and 24-hour TSP criteria is not anticipated even with this theoretical worst case situation where the entire worksites were assumed active (i.e. 100%). However, for the ASRs near the work sites (e.g. open storage, Wu Nga Lok Yeung, Wing Fai Centre, Belair Monte, etc.), exceedance of 1-hour and 24-hour TSP criterion is still predicted. As the Tier 1 assessment is for screening purposes only and does not reflect the actual on-site activities, a more focused Tier 2 assessment has been undertaken. Figures 3.78 and Figure 3.79 show the contours of Tier 1 1-hour and 24-hour TSP concentrations at 1.5m above ground.
Short-term Assessment (Tier 2) for Year 2021
A more focused Tier 2 assessment has been conducted with the assumed 15% active works areas for the adjacent construction site positioned nearest to the potentially worst affected ASRs. As mentioned in Section 3.5.1.5, the Tier 2 assessment is also very conservative and will lead to over prediction of the dust impacts.
The maximum 1-hour and 24-hour TSP concentrations from Tier 2 screening assessment have been predicted. Appendix 3.14 shows the assessment results and Table 3.48 below summarises the cumulative 1-hour and 24-hour TSP impact (Tier 2) at the ASRs concerned. 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.
Contours have been presented in Figures 3.80 and Figure 3.81 for Tier 2 1-hour and 24-hour TSP concentrations at 1.5m above ground to illustrate the short-term dust impact on the ASR.
Long-term Assessment for Year 2021
The maximum annual TSP concentrations from long-term
assessment have been predicted. Appendix 3.13 shows the assessment results
and Table 3.49 below
summarises the cumulative annual TSP
impact at the ASRs concerned. In summary, the predicted annual TSP
concentrations at all ASRs would comply with the criterion of 80µg/m3, and therefore no adverse
long-term impact is anticipated. Contours of annual TSP concentrations at 1.5m
above ground are shown in Figure 3.82.
Table 3.47 – Tier 1 assessment – predicted cumulative 1-hour and 24-hour TSP
concentrations at 1.5m above ground (including background concentration of
73.1μg/m3) under mitigated scenario in FLN NDA in Year 2021.
|
Locations |
ASR |
1-hour TSP concentrations at
various height (µg/m3) |
24-hourTSP concentrations at
various height (µg/m3) |
||||
|
1.5m |
5m |
10m |
1.5m |
5m |
10m |
||
|
Existing ASRs |
|
||||||
|
Open Storage |
FLN-E44 |
570 |
348 |
209 |
135 |
110 |
97 |
|
FLN-E47 |
575 |
317 |
187 |
264 |
153 |
107 |
|
|
Wu Nga Lok Yeung |
FLN-E94 |
555 |
443 |
269 |
200 |
167 |
121 |
|
FLN-E98 |
525 |
377 |
235 |
217 |
162 |
122 |
|
|
Wing Fai Centre |
FLN-E128 |
501 |
353 |
215 |
187 |
149 |
108 |
|
Belair Monte |
FLN-E129 |
654 |
447 |
252 |
255 |
189 |
133 |
|
House near Ma Wat Wai |
FLN-E140 |
576 |
409 |
279 |
209 |
168 |
133 |
|
Village House near Wu Nga Lok Yeung |
FLN-E155 |
505 |
270 |
227 |
182 |
126 |
115 |
|
Wu Nga Lok Yeung |
FLN-E166 |
504 |
374 |
236 |
209 |
169 |
127 |
|
Planned ASRs |
|
||||||
|
Existing North District Temporary Wholesale Market
for Agricultural Products |
FLN-188 |
629 |
450 |
271 |
185 |
144 |
114 |
|
FLN-190 |
566 |
468 |
303 |
161 |
150 |
123 |
|
|
FLN-191 |
659 |
445 |
283 |
191 |
164 |
124 |
|
Note:
[1] Values include background concentration:
73.1 µg/m3 of TSP
Table 3.48 – Tier 2 assessment – predicted cumulative 1-hour and 24-hour TSP
concentrations at 1.5m above ground (including background concentration of
73.1μg/m3) under mitigated scenario in FLN NDA in Year 2021.
|
Locations |
ASR |
1-hour TSP concentrations at various height (µg/m3) |
24-hourTSP concentrations at various height (µg/m3) |
||||
|
1.5m |
5m |
10m |
1.5m |
5m |
10m |
||
|
Existing ASRs |
|
||||||
|
Open Storage |
FLN-E44 |
277 |
180 |
134 |
105 |
90 |
84 |
|
FLN-E47 |
266 |
231 |
160 |
110 |
98 |
87 |
|
|
Wu Nga Lok Yeung |
FLN-E94 |
311 |
218 |
153 |
137 |
115 |
94 |
|
FLN-E98 |
372 |
263 |
175 |
145 |
119 |
99 |
|
|
Wing Fai Centre |
FLN-E128 |
260 |
221 |
143 |
99 |
97 |
90 |
|
Belair Monte |
FLN-E129 |
380 |
253 |
160 |
187 |
131 |
99 |
|
House near Ma Wat Wai |
FLN-E140 |
277 |
208 |
164 |
135 |
117 |
103 |
|
Village House near Wu Nga Lok Yeung |
FLN-E155 |
434 |
202 |
165 |
144 |
102 |
96 |
|
Wu Nga Lok Yeung |
FLN-E166 |
389 |
272 |
168 |
152 |
128 |
102 |
|
Planned ASRs |
|
||||||
|
Existing North District Temporary Wholesale Market
for Agricultural Products |
FLN-188 |
369 |
268 |
174 |
107 |
102 |
93 |
|
FLN-190 |
428 |
311 |
202 |
124 |
113 |
98 |
|
|
FLN-191 |
468 |
309 |
194 |
136 |
120 |
98 |
|
Note:
[1] Values include background concentration: 73.1
µg/m3 of TSP.
Table 3.49 - Long term
assessment - predicted cumulative annual TSP concentrations at 1.5m above
ground (including background concentration of 73.1μg/m3) under
mitigated scenario in FLN NDA in Year 2021.
|
Locations |
ASR |
Annual TSP
concentrations at various height (µg/m3) |
||
|
1.5m |
5m |
10m |
||
|
Existing ASRs |
|
|||
|
Open Storage |
FLN-E44 |
73.7 |
73.6 |
73.4 |
|
FLN-E47 |
75.3 |
74.3 |
73.7 |
|
|
Wu Nga Lok Yeung |
FLN-E94 |
75.3 |
74.9 |
74.2 |
|
FLN-E98 |
75.5 |
74.8 |
74.1 |
|
|
Wing Fai Centre |
FLN-E128 |
74.5 |
74.3 |
73.9 |
|
Belair Monte |
FLN-E129 |
75.4 |
74.9 |
74.2 |
|
House near Ma Wat Wai |
FLN-E140 |
74.9 |
74.3 |
73.8 |
|
Village House near Wu Nga Lok Yeung |
FLN-E155 |
74.2 |
74.0 |
73.7 |
|
Wu Nga Lok Yeung |
FLN-E166 |
75.4 |
74.8 |
74.2 |
|
Planned ASRs |
||||
|
Existing North District Temporary Wholesale Market
for Agricultural Products |
FLN-188 |
73.9 |
73.7 |
73.5 |
|
FLN-190 |
73.8 |
73.7 |
73.5 |
|
|
FLN-191 |
74.1 |
73.8 |
73.5 |
|
Note:
[1] Values include background concentration: 73.1
µg/m3 of TSP
3.8.2 Operation Phase
3.8.2.1 Chimney Emission
Based on the assessment, adverse cumulative air quality impact due to the chimney emissions is not anticipated and no mitigation measures would be required.
3.8.2.2 Vehicular Emission
Based on the assessment, adverse cumulative air quality impact due to the vehicular emissions is not anticipated and no mitigation measures would be required.
3.8.2.3 Odour Emission
With the implementation of the odour control design in the proposed STW expansion in FLN, it is predicted that, even with very conservative assumptions, the odour concentration at all ASRs would comply with the odour criterion. For other future development, any air sensitive use is required to avoid the non-compliance zone as shown in Figure 3.55b.
3.9.1 Construction Phase
The fugitive dust assessment for the construction phase has concluded that watering in all works areas once per hour during working hours (7:00am – 7:00pm) would be required to control the fugitive dust impact. In addition, the Contractor is also recommended to adopt good site practices and is required to follow the procedures and requirements given in the Air Pollution Control (Construction Dust) Regulation.
The results indicate that, with mitigation measures, the predicted 1-hour and 24-hour and annual TSP concentrations at the identified ASRs would comply with the respective criteria. Therefore, it is concluded that there will be no adverse residual air quality impacts during construction phase.
3.9.2 Operational Phase
Vehicular emissions from open roads are expected to be the major air pollutants during the operational phase of the NENT NDA development. Fixed polluting sources such as industrial emissions, odour emissions from sewage treatment works, sewage pumping stations and slaughtering house will also have potential air quality impact to ASRs.
Chimney emissions impact is predicted to be acceptable and no mitigation measures would be required.
The results of the cumulative impact due to vehicular and chimney emissions revealed that 1-hour, 24-hour and annual average NO2 concentrations and 24-hour and annual average RSP concentrations would comply with the relevant AQO criteria.
Odour impact due to the existing SWHSTW will be improved gradually with the expansion of the STW, since odour control designs will be installed for the newly constructed or retrofitted odour sources during the expansion works. Odour impact due to the proposed STW Extension located in the FLN NDA is not anticipated with the incorporation of all the proposed odour control design. Odour non-compliance zone (the zone where the odour concentration exceeds the statutory odour limit) has been identified. It is necessary to ensure that no planned air sensitive receivers are located inside the non-compliance zone in the future detailed design stage.