|
|
|||||
|
|||||
|
|
|
|
|||||
|
|||||
|
|
|
This report takes into account the particular It is not intended for and should
not be relied Job number |
|
|
|
|
||
|
Ove Arup & Partners
Hong Kong Ltd 80 Tat Chee Avenue Kowloon Tong Kowloon Hong Kong |
General
4.1.1 The relevant legislations, standards and guidelines
applicable to the present study for the assessment of air quality impacts
include:
(1)
Air Pollution Ordinance (APCO) (Cap 311);
(2)
Air Pollution Control (Construction Dust) Regulation; and
(3)
Environmental Impact Assessment Ordinance (EIAO) (Cap. 499), Technical
Memorandum on Environmental Impact Assessment Process (TM-EIAO), Annex 4 and
Annex 12.
4.1.2 The APCO (Cap.311) provides the power for controlling air pollutants from a variety of stationary and mobile sources and encompasses a number of Air Quality Objectives (AQOs).
Air Quality
Objectives
4.1.3 In 2007, EPD commissioned a
comprehensive study to review the AQOs. The study considered various factors
e.g. protection of public health and socio-economic etc., and devised a new set
of AQOs and developed a long-term air quality management strategy for Hong
Kong. The new AQOs are adopted with effect from 1 January 2014 in respect of
the Air Pollution Control (Amendment) Ordinance 2013 and EIAO. Table 4.1 below summarizes the new AQOs.
Table 4.1:Hong
Kong Air Quality Objectives
|
Pollutant |
Limits on Concentration,
µg/m3 [1] (Number of Exceedance
per year allowed in brackets) |
||||
|
10-min |
1-hr |
8-hr |
24-hr [2] |
Annual [2] |
|
|
SO2 |
500 (3) |
|
|
125 (3) |
|
|
TSP |
|
500 [5] |
|
|
|
|
RSP (PM10) [3] |
|
|
|
100 (9) |
50 (0) |
|
FSP (PM2.5) [4] |
|
|
|
75 (9) |
35 (0) |
|
CO |
|
30,000 (0) |
10,000 (0) |
|
|
|
NO2 |
|
200 (18) |
|
|
40 (0) |
|
O3 |
|
|
160 (9) |
|
|
|
Pb |
|
|
|
|
0.5 (0) |
Note:
[1]
Measured at 293K and 101.325 kPa.
[2]
Arithmetic mean.
[3]
Respirable suspended particulates (RSP) means suspended particulates in
air with a nominal aerodynamic
diameter of 10 micrometres or smaller.
[4]
Fine suspended particulates (FSP) means suspended particulates in air
with a nominal aerodynamic diameter of 2.5 micrometres or smaller.
[5]
Not an AQO but is a criteria for evaluating air quality impacts as
stated in Annex 4 of TM-EIAO.
Air
Pollution Control (Construction Dust) Regulation
4.1.4 The Air Pollution Control
(Construction Dust) Regulation specifies processes that require special dust
control. The Contractors are required to inform the EPD and adopt proper dust
suppression measures while carrying out “Notifiable Works” (which requires
prior notification by the regulation) and “Regulatory Works” to meet the
requirements as defined under the regulation.
4.1.5 In accordance with Annex 4
of TM-EIAO, the limit of 5 odour units (OU) based on an averaging time of 5
seconds for odour prediction assessment should not be exceeded at any
receivers.
4.1.6 In accordance with Section 3.3.9
of Chapter 9 of HKPSG, some small community uses (i.e. crematoria, livestock
yards, stock wagon washing areas and wholesale fishes and poultry markets) can
cause significant air pollution nuisance, primarily due to odour. Wherever,
practicable, these uses should be sited away from the main urban centres.
Usually a buffer distance of at least 200m from nearby sensitive uses is
required. Acceptable uses in the buffer area include industrial areas, godowns,
cold storages, carparks and amenity areas. Open space uses may be also be
tolerated.
4.2
Description
of Existing Environment
4.2.1 Historical air quality monitoring data from
Kwun Tong Air Quality Monitoring Station (AQMS) has been examined. The latest 5
years of air quality monitoring data published, i.e. 2008 to 2012 are tabulated in Table 4.2 below.
Table 4.2:Air
Quality Monitoring Data (Kwun Tong AQMS, 2008-2012)
|
Pollutant |
Year |
Highest |
|||
|
SO2 |
2008 |
258 |
N/M |
69 |
17 |
|
2009 |
168 |
N/M |
57 |
11 |
|
|
2010 |
99 |
N/M |
34 |
10 |
|
|
2011 |
115 |
N/M |
42 |
12 |
|
|
2012 |
98 |
N/M |
53 |
11 |
|
|
5-year mean |
148 |
- |
51 [41%][5] |
12 |
|
|
AQO[3] |
N/A |
N/A |
125 (9) |
N/A |
|
|
NO2 |
2008 |
243 (11)[2] |
N/M |
139 |
59 |
|
2009 |
249 (24)[2] |
N/M |
134 |
58 |
|
|
2010 |
242 (9)[2] |
N/M |
123 |
59 |
|
|
2011 |
285 (41)[2] |
N/M |
155 |
63 |
|
|
2012 |
398 (78)[2] |
N/M |
179 |
59 |
|
|
5-year mean |
283 [142%][5] |
- |
146 |
60 |
|
|
AQO[3] |
200 (18) |
N/A |
N/A |
40 |
|
|
RSP (PM10) |
2008 |
238 |
N/M |
136 (11)[2] |
47 |
|
2009 |
226 |
N/M |
169 (8)[2] |
48 |
|
|
2010 |
785 [8] |
N/M |
681 (9)[2][6] |
47 |
|
|
2011 |
205 |
N/M |
117 (6)[2] |
49 |
|
|
2012 |
N/M |
169 (8)[2] |
|||
|
5-year mean |
220 |
|
