Table 3.1 Summary of Impact EM&A Requirements

Type of Monitoring	Parameter	Frequency	Location	Remarks
Air Quality	1-hr TSP	Three times / 6 days	AMS1 – Sha Lo Wan AMS4 – San Tau	While the highest dust impact was expected
	24-hr TSP	Once / 6 days		--
Noise	L10(30 min.) dB(A) L90(30 min.) dB(A) Leq(30 min.) dB(A) (as six consecutive Leq, 5min readings)	Once per week	NMS1 – Sha Lo Wan NMS4 – San Tau	Daytime on normal weekdays (0700-1900 hrs)
Water Quality	· Temperature(°C) · pH(pH unit) · turbidity (NTU) · water depth (m) · salinity (ppt) · dissolved oxygen (DO) (mg/L and % of saturation) · suspended solids (SS) (mg/L)	Impact monitoring: 3 days per week, at mid-flood and mid-ebb tides (within ± 1.75 hour of the predicted time) during the construction period of the Contract	IS1, IS2, IS3 IS4, CS1, CS2, SR1, SR2, SR3, SR6, ST1, ST2, ST3, SRA	· 3 water depths: 1m below sea surface, mid-depth and 1m above sea bed. · If the water depth is less than 3m, mid-depth sampling only. · If water depth less than 6m, mid-depth may be omitted.
Dolphin	Line-transect Methods	Twice per month	West Lantau	--
	Construction-phase Underwater Noise	10 days from the start of the bored piling activities for the first three pier sites during the bored piling process in the first three sits in the waters to the west of Airport	R1 and R2	10 days underwater noise monitoring at first two pier sites was conducted during the bored piling activities in the reporting period
	Dolphin Behaviour Monitoring (Acoustic)	During bridge construction	West Lantau	12 days Dolphin Behaviour Monitoring was conducted during the bored piling activities in the reporting period
	Land-based Dolphin Behaviour and Movement Monitoring	30 days from the start of bored piling activities at the three pier sites	Sham Wat	13 days Land-based Dolphin Behaviour and Movement Monitoring was conducted during the bored piling activities in the reporting period