2.            AIR QUALITY

 

2.1         Monitoring Requirement

 

2.1.1     In accordance with the approved EM&A Manuals, 24-hour Total Suspended Particulates (TSP) monitoring at the designated air quality monitoring station 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.

 

2.1.2     The monitoring equipment, monitoring methodology and monitoring schedule are detailed in the monthly EM&A Reports for EP-451/2013 prepared for Contract No. ED/2018/04.

 

2.2         Monitoring Locations

 

2.2.1     According to the EM&A Manual, three air quality monitoring locations, 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, which are identified in Cha Kwo Ling area, are farther than 500m away from the site boundary and thus not covered by this Contract. The monitoring works in Cha Kwo Ling area are covered by Contract No. ED/2018/04.

 

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) for air quality monitoring.

 

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 location KER1b for air quality monitoring.

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 location KTD2b for air quality monitoring.

 

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 for air quality monitoring.

 

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 for air monitoring on 3 August 2020.

 

2.2.7      The most updated locations are summarized in Table 2.1 and shown in Figure 2.


2.3         Results and Observations

 

2.3.1     The monitoring results and observations for KTD1, KTD2c and KER1 are reported in the Monthly EM&A Reports for EP-451/2013 prepared for Contract No. ED/2018/04.

 

2.3.2     Four Action Level exceedance for 24-hr TSP were recorded in the reporting month. Three exceedance were recorded at KTD2c on 11, 16 and 21 November 2020 and an exceedance was recorded at KER1 on 16 November 2020.

 

2.3.3     One Limit Level exceedance for 24-hr TSP was recorded in the reporting month. An exceedance was recorded at KTD2c on 5 November 2020.

 

2.3.4     No Action / Limit Level exceedance was recorded for 24-hr TSP at KTD1 in the reporting month.

 

2.3.5     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.

 

2.3.6     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.

 

2.3.7     No complaint of air quality was received. Therefore, no impact 1-hour TSP monitoring was conducted in the reporting month.

 

2.3.8     The weather conditions during the monitoring are provided in Appendix F.