2. AIR QUAILITY MONITORING

2.1 Monitoring Locations

2.1.1 The air quality monitoring works for the Contract are covered by Contract No. HY/2013/04 ¡§Hong Kong-Zhuhai-Macao-Bridge HKBCF ¡V Passenger Clearance Building¡¨ and Contract No. HY/2011/03 ¡§Hong Kong-Zhuhai-Macao Bridge Hong Kong Link Road ¡V Section between Scenic Hill and HKBCF¡¨. The ET of the Contract or another ET of the HZMB project is required to conduct impact air quality monitoring at AMS2, AMS3C, AMS6 and AMS7B as part of EM&A programme if these air quality monitoring stations are no longer covered under Contract No. HY/2013/04 and HY/2011/03. Figure 1 shows the locations of air monitoring stations.

Table 2.1 Air Quality Monitoring Location

Air Monitoring Station	Location
AMS2	Thung Chung Development Pier
AMS3C	Ying Tung Estate Market Rooftop
AMS6	Dragonair/CNAC (Group) Building (A80)
AMS7B	3RS Site Offices

2.2 Monitoring Requirements

2.2.1 The monitoring requirements, equipment, parameters, frequency and duration, methodology, schedule, and meteorological information are described in the monthly EM&A Reports prepared for Contract No. HY/2013/04 and HY/2011/03.

2.2.2 The Action and Limit levels for 1-hr TSP and 24-hr TSP are summarized in Table 2.2.

Table 2.2 Action and Limit Levels for Air Quality

Monitoring Station	Action Level (µg/m³)	Limit Level (µg/m³)
1 hour TSP
AMS2	374	500
AMS3C	368
AMS6	360
AMS7B	370
24 hours TSP
AMS2	176	260
AMS3C	167
AMS6	173
AMS7B	183

2.2.3 The event and action plan is provided in Appendix D.

2.2.4 If exceedance(s) at these stations is/are recorded by the ET of the Contract or referred by the other ET under the HZMB project to the Contract, the ET of the Contract will carry out an investigation and findings will be reported in the monthly EM&A Report.

2.3 Monitoring Results

2.3.1 The monitoring results for AMS2, AMS6 and AMS3C and AMS7B are reported in the monthly EM&A Reports prepared for Contract No. HY/2011/03 and HY/2013/04 respectively for the reporting month.

2.3.2 Summary of Action and Limit Level exceedance of 1-hr TSP level and 24-hr TSP level at AMS6 shall be referred to the monthly EM&A report prepared by Contract No. HY/2011/03.

2.3.3 There was no Action and Limit Level exceedances of 1-hr TSP level and 24-hr TSP level recorded at station AMS2, AMS3C and AMS7B as referred to the Environmental Team of Contract No. HY/2013/04 during the reporting period.