Appendix F1 Impact Prediction Review of Construction Dust at the Air Quality Monitoring Station

Table 1 Hourly Average TSP concentration at Discrete ASRs during Construction Phases (mg/m³) (Unmitigated)

ASR ID	Air Monitoring Station ID	1 hour TSP Concentrations (mg/m^3) + Background
		Receiver height = 1.5m		Receiver height = 10m
		1-hr Average	24-hr Average	1-hr Average	24-hr Average
A30	CA1	1192	564	737	412
A24	CA2	890	399	698	331
A46	CA3	885	327	589	263
A25	CA4	930	421	753	358

Table 2 Hourly Average TSP concentration at Discrete ASRs during Construction Phases (mg/m³) (Mitigated)

ASR ID	Air Monitoring Station ID	1 hour TSP Concentrations (mg/m^3) + Background
		Receiver height = 1.5m		Receiver height = 10m
		1-hr Average	24-hr Average	1-hr Average	24-hr Average
A30	CA1	358	201	244	163
A24	CA2	282	160	235	143
A46	CA3	281	142	207	126
A25	CA4	293	165	248	149

Note :

1. Bold figures indicate that the TSP concentration exceeds the HKAQO or the guideline level of 500 mg/m³.

2. Background concentration : TSP 80 mg/m³.

The impact prediction review checklist is used to check the extent of discrepancy between the actual and the predicted impact at the designated monitoring stations. ET should estimate the efficiency of proposed mitigation and plan it carefully for the ongoing construction activities.

Appendix F2 Impact Prediction Review of Construction Noise at the Noise Monitoring Station

Table 1 Predicted Noise Levels during Construction Phases at the Noise Monitoring Stations (Unmitigated)

NSR ID	Noise Monitoring Station ID	Leq (30min) dB(A)
		Construction Phases
		Site Development	Road Construction
NSR1 NSR2 NSR10	CN1 CN2 CN3	76.9 71.5 70.9	83.3 82.8 82.9

Table 2 Predicted Noise Levels during Construction Phases at the Noise Monitoring Stations (Mitigated)

NSR ID	Noise Monitoring Station ID	Leq (30min) dB(A)
		Construction Phases
		Site Development	Road Construction
NSR1 NSR2 NSR10	CN1 CN2 CN3	64.7 66.8 59.0	68.2 73.8 70.0

Note :

1. Bold figures indicate an exceedance of the acceptable noise limits – residential 75 dB(A), Schools 70dB(A) (for normal school hours)

2. -- implies no noise impact

The impact prediction review checklist is used to check the extent of discrepancy between the actual and the predicted impact at the designated monitoring stations. ET should estimate the efficiency of proposed mitigation and plan it carefully for the ongoing construction activities.