3c.1.1.1 This section presents the assessment of the potential air quality impacts associated with the construction and operation phases of the IWMF located at both Tsang Tsui Ash Lagoon (TTAL) site and an artificial island near SKC concurrently (i.e. co-exist scenario). A key environmental issue would be the cumulative aerial emission impacts during operation phase in the vicinity of the IWMFs at both sites.
3c.1.1.2 Other potential air quality impacts arising from construction dust emissions and odour emissions would be localized within the close proximity of the respective project site and no cumulative dust or odour impact is expected under the co-exist scenario. The predicted air quality results arising from construction dust and odour emission presented in the Section 3a & 3b are still valid for the co-exist scenario. Therefore, this section only presents the results of the cumulative aerial emission impact during operation phase.
3c.2 Prediction and Evaluation of Environmental Impacts
3c.2.1 Operation Phase - Gaseous Pollutants
3c.2.1.1
The methodology for the air
quality assessment for this scenario is the same as in Sections 3a and 3b. The
predicted cumulative NO2 and RSP concentrations at the
representative ASRs within the identified hot spot areas using PATH and
Gaussian models are summarized in Appendix 3.12. The hourly and/or daily and annual average contour
plots for NO2 and RSP at 1.5m above ground are presented in Figures 3c.3 to 3c.7. From the contour
plots, exceedances of the hourly NO2 of 300µg/m3 are predicted
in Nim Wan & Lung Kwu Sheung Tan and
3c.2.1.2 The other potential air pollutants (individual chemicals) covered in Annex 1 of EPD’s “A Guidance Note on the Best Practicable Means for Incinerator (Municipal Waste Incineration) BPM 12/1(08)” are identified as non-criteria air pollutants. The predicted short-term and long-term concentrations of these non-criteria air pollutants and their health impacts are assessed in Section 9c of this EIA Report.
3c.3.1 Operation Phase - Gaseous Pollutants
3c.3.1.1
As mentioned in Section 3a & 3b of
this EIA Report, air pollution control and stack monitoring system will be
installed for the IWMF to ensure that the emissions from the IWMF stacks will
meet the proposed target emission limits that is more stringent than those
stipulated in
3c.4 Residual Environmental Impact
3c.4.1 Operation Phase - Gaseous Pollutants
3c.4.1.1
With the implementation of practicable air
pollution control and stack monitoring system for the IWMF, emissions from the IWMF
stacks will meet the proposed target emission limits that is more stringent
than those stipulated in
3c.5 Environmental Monitoring and Audit Requirements
3c.5.1 Operation Phase - Gaseous Pollutants
3c.5.1.1
The monitoring requirement for each site stated in
the Section 3a & 3b will strictly follow. Air pollution control and stack monitoring
system will be installed for the IWMF to ensure that the emissions from the
IWMF stack will meet the stringent target emission limits and all the potential
odour emissions associated with the operation of the IWMF will be collected and
destroyed by the incineration process or ventilated to deodorizer before
discharge to the atmosphere. Monitoring
of air quality parameters of concern due to stack emissions has to be conducted
in accordance with the requirements similar to those stipulated in the “A
Guidance Note on the Best Practicable Means for Incinerator (Municipal Waste
Incineration) BPM 12/1(08)”.
3c.6.1 Operation Phase - Gaseous Pollutants
3c.6.1.1
With the implementation of practicable air
pollution control, the cumulative air quality impact assessment results show
that all the air sensitive receivers in the vicinity of the Project sites would
comply with the Air Quality Objectives (AQOs).