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
¨C Sha Lo Wan AMS4
¨C 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
¨C Sha Lo Wan NMS4
¨C San Tau |
Daytime
on normal weekdays
(0700-1900
hrs) |
Water
Quality |
¡¤
Temperature(¡ãC) ¡¤
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 ¡À 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 |
20
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 |
18
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 |
18
days Land-based Dolphin Behaviour and Movement
Monitoring was conducted during the bored piling activities in the reporting
period |