In accordance with the
approved EM&A Manuals, 24-hour Total Suspended Particulates (TSP) level and
Leq (30min) at the designated monitoring stations is required.
Impact 24-hour TSP monitoring should be carried out at least once every 6 days.
In case of complaints, 1-hour TSP monitoring should be carried out at least 3
times per 6 days when the highest dust impacts are likely to occur. Leq (30min) monitoring is conducted for at least once a
week during the construction phase between 0700 and 1900 on normal weekdays.
The Action and Limit Levels of the air quality monitoring and noise monitoring
are given in Appendix C
2.2.1
According to the EM&A Manual, three
monitoring locations for air quality monitoring and noise monitoring, namely
KTD1, KTD2 and KER1, are covered by this Contract within the South Apron Area
of Former Kai Tak Airport. The other two air quality
monitoring locations and two noise monitoring locations which are identified in
Cha Kwo Ling area, are farther than 500m and 300m
away from the site boundary respectively and thus not covered by this Contract.
The monitoring works in Cha Kwo Ling area are covered
by other Contract(s) respectively.
2.2.2
According to the approved alternative baseline
air quality and noise monitoring locations (EPD reference: EP2/K19/A/21 Pt.5),
the original monitoring locations (KTD1, KTD2 and KER1) are proposed to be
replaced by alternative monitoring locations (KTD1a, KTD2a and KER1a).
2.2.3
According to the approved relocation of
monitoring location KER1a (EPD reference: () in EP2/K19/A/21 Pt.5), the
monitoring location KER1a are proposed to be relocated by alternative
monitoring locations KER1b.
2.2.4
According to the approved relocation of
monitoring location KTD2a (EPD reference: () in EP2/K19/A/21 Pt.6), the
monitoring location KTD2a are proposed to be relocated by alternative
monitoring locations KTD2b.
2.2.5
According to the approved relocation of monitoring
location KTD2b (EPD reference: () in EP2/K19/A/21 pt.7), the monitoring
location KTD2b are proposed to be relocated by alternative monitoring location
KTD2c.
2.2.6
As informed by the ET of Contract No.
ED/2018/04, the monitoring location KTD1a and KER1b have been relocated to KTD1
and KER1 on 3 August 2020.
2.2.7
The most updated locations are summarized in Table 2.1
and shown in Figure 2.
2.3.1 Seven Action Level exceedance for 24-hr TSP were recorded in the
reporting period. Five exceedance were recorded at KTD2c on 14, 24 October 2020
and 11, 16, 21 November 2020. Two exceedance were recorded at KER1 24 October
2020 and 16 November 2020.
2.3.2 One Limit Level exceedance for 24-hr TSP was recorded in the reporting
period. An exceedance was recorded at KTD2c on 5 November 2020.
2.3.3 A Limit Level exceedance for construction noise was recorded. Exceedance
was recorded at KTD1 on 21 October 2020.
2.3.4 No Action / Limit Level exceedance was recorded for construction noise at
KTD2c and KER1 in the reporting period.
2.3.5 No raining and wind with speed over 5 m/s was observed during noise
monitoring according to the onsite observation.
2.3.6 Graphical presentation of the monitoring data in the reporting period is
presented in Appendix D.
2.4
Comparison of Monitoring Results with EIA
Predictions
2.4.1 The monitoring data was compared with the EIA predictions as summarized
in Table 2.2
and Table 2.3.
2.4.2 The 24-hour TSP monitoring results at KTD1 in
October and KER1 in October and November exceeded the Predicted Maximum 24-hour
TSP Concentration in the approved Environmental Impact Assessment (EIA) Report.
Seven Action Level exceedance and one Limit Level exceedance were recorded in
the reporting period.
2.4.3 On 14 October 2020, at KTD2c non-project related construction works were
carried out during 24-hr TSP monitoring. Dust was generated from construction
site of Trunk Road T2 when C&D materials loading and unloading activities
was processing. Thus, it is considered that this exceedance is not project
related.
2.4.4 On 24 October 2020, at KER1 and KTD2c non-project related construction
works were carried out during 24-hr TSP monitoring. Dust arising from the
vehicle movement from construction site of Trunk Road T2. Thus, it is considered
that this exceedance is not project related.
2.4.5 On 24 October 2020, at KTD1 non-project related construction activities
at the nearby construction sites of New Acute Hospital and the fluctuation of
road traffic along Shing Fung Road which affected the
result of 24-hour TSP concentration. Thus, it is considered that this
exceedance is not project related.
2.4.6 On 5, 11, 16 and 21 November 2020, at KTD2c non-project related
construction works were carried out during 24-hr TSP monitoring. Dust was
generated from construction site of Trunk Road T2 when C&D materials
loading and unloading activities was processing. Thus, it is considered that
this exceedance is not project related.
2.4.7 On 16 November 2020, at KER1 non-project related construction works were
carried out during 24-hr TSP monitoring. Dust arising from the road traffic
along Kai Hing Road and the vehicle movement from the
adjacent building (Kerry DG Warehouse (Kowloon Bay). Thus, it is considered
that this exceedance is not project related.
2.4.8 The noise monitoring results at KER1 in the
reporting period did not exceed the Maximum Predicted Mitigated Construction
Noise Level in the approved Environmental Impact Assessment (EIA) Report and no
Action / Limit Level exceedance for KER1 was recorded in the reporting period.
2.4.9 The noise monitoring results at KTD1 in
October and November exceeded the Maximum Predicted Mitigated Construction
Noise Level in the approved Environmental Impact Assessment (EIA) Report. A
limit Level exceedance for KTD1 was recorded in the reporting period.
2.4.10 On 21 October 2020, at KTD1 a breaker from construction site of New Acute
Hospital was operated continuously. The noise generated by the breaker during
breaking activity dominates the ambient or background noise. Thus, it is
considered that this exceedance is not project related.
2.4.11 On 23 November 2020, at KTD1 non-project related construction noise
generated from the construction activity at the adjacent construction site (New
Acute Hospital at Kai Tak Development Area) and the
fluctuations of traffic flow along Shing Fung Road
throughout the day. Thus, it is considered that this exceedance is not project
related.