2.1.1 The EM&A programme was undertaken in accordance with the EM&A Manual. It should be noted that the air quality, noise, water quality and ecology monitoring works are covered by this contract.
Air quality Monitoring
2.1.2 1-hour Total Suspended Particulates (TSP) levels should be measured at the designated air quality monitoring stations to ensure that any deteriorating air quality could be readily detected and timely action shall be undertaken to rectify such situation. Impact 1-hour TSP monitoring was conducted for at least three times every 6 days when the highest dust impact occurs.
Noise Monitoring
2.1.3 Leq (30min) monitoring is conducted at least once a week when there are Project-related construction activities being undertaken within a radius of 300 m from the monitoring stations. The monitoring is conducted during the construction phase between 0700 and 1900 on normal weekdays at the designated monitoring locations.
Water quality Monitoring
2.1.4 Turbidity (in NTU), pH, DO (in mg/L and % of saturation), Temperature (in °C), Salinity (in ppt) and Suspended Solids are conducted for three days per week at mid-flood and mid-ebb with sampling and measurement at the designated monitoring stations.
Ecology Monitoring
2.1.5 Ardeid night roost monitoring was conducted once a month in areas within 100 m from the Project boundary to monitor the effectiveness of proposed mitigation measures and detect any unpredicted indirect ecological impacts arising from the Project.
2.1.6 Ecological monitoring of birds was conducted monthly during the quarter at point count sites and transect routes along the wetland habitats in Fung Lok Wai and Nam Sang Wai as well as along Shan Pui River and Kam Tin River within 500 m from the Project boundary.
2.2.1 The air quality and noise monitoring are summarized in Table 3. The locations of the air quality and noise monitoring stations shown in Figure 2 and Figure 3, respectively.
2.2.2 The coordinates of water quality monitoring locations are summarized in Table 4. The locations of the water quality monitoring stations shown in Figure 4.
2.3.1
Graphical
presentation of the environmental monitoring data in the reporting period is
presented in Appendix D.
Air
quality Monitoring
2.3.2
1-hour TSP
impact monitoring at AM1 and AM2 were carried out in the reporting period, the
air quality monitoring results are reported in the monthly EM&A Report
prepared for this Contract.
2.3.3
No Action
and Limit Level exceedance was recorded for air quality monitoring in the
reporting period.
Noise
Monitoring
2.3.4
Construction
noise monitoring were carried out in the reporting period, the construction
noise monitoring results for CM1, CM2 and CM3 are reported in the monthly
EM&A Reports prepared for this Contract.
2.3.5
No Action
and Limit Level exceedance was recorded for construction noise monitoring in
the reporting period.
2.3.6
No raining
and wind with speed over 5 m/s was observed during noise monitoring according
to the onsite observation.
2.3.7
During the
noise monitoring period, at CM2, road traffic from the squatter house at the
west of Yuen Long STW was observed, at CM3, road traffic from the Nam Sang Wai
Road was observed. No effect that arose from the other special phenomena and
work progress of the concerned site for CM1 was noted during the current
monitoring period.
Water
quality Monitoring
2.3.8
Water
quality monitoring were carried out in the reporting period, the monitoring
results for M1, M2 and M3 are reported in the monthly EM&A Reports prepared
for this Contract.
2.3.9
Due to
safety concerns, the water quality monitoring on 7 October 2023 [Mid-Flood and
Mid-Ebb] has been cancelled by Typhoon Signal No. 3.
2.3.10
No Action
and Limit Level exceedance was recorded for Dissolved Oxygen, Turbidity and Suspended
Solids. Number of water quality exceedance recorded in the reporting period at
each impact stations is summarized in Table 5.
Ecology
Monitoring
2.3.11
Ardeid
night roost monitoring and ecological bird monitoring were carried out in the
reporting period. The monitoring results are reported in the monthly EM&A
Reports prepared for this Contract.
2.3.12
Results of
the ardeid night roost monitoring showed that the two confirmed ardeid night
roosts (ANR 1 and ANR 2) during the pre-construction survey were still observed
to be active from October 2023 to December 2023. No Action / Limit Level
exceedance at NMS1 and NMS2 was recorded during the reporting period.
2.3.13
Results of
the ecological bird monitoring recorded no exceedance in Action / Limit Level
during the reporting period.
2.4.1
The Action
and Limit Levels for air quality, noise, water quality and ecology monitoring
have been set and are presented in Appendix C.
2.5.1
The event
and action plans for air quality, noise, water quality and ecology monitoring
are presented in Appendix E.
2.6.1
The
Contractor had implemented environmental mitigation measures and requirements
as stated in the EIA Report, the EP and EM&A Manual. The implementation
status of the environmental mitigation measures during the reporting period is
summarized in Appendix G.