Traffic Noise
Fixed Plant Noise
(i)
Broadband
measurement of Leq (30 minutes) dB(A). Shorter measurement period may be used if it
can be demonstrated that the noise level is constant.
(ii)
Frequency
analysis between 31.5Hz and 16kHz measurement at 1/3 octave intervals. If the noise emanating from the louvre is
found to be tonal (as defined in IND-TM) then an appropriate tonal correction
shall be applied to the measured noise level to achieve the corrected noise
level (CNL). The CNL shall be compared
with the noise specifications.
Table 3.1 Proposed
Construction Noise Monitoring Stations
Station |
NSR ID Reference (Based on EIA Report) |
Location |
CM1 |
CKL2 |
Existing
Residential Development along Cha Kwo Ling Road |
CM2 |
EHC1 |
Residential
Development near Eastern Harbour Crossing |
CM3 |
||
CM4 |
V1 |
Village
House at North of Eastern Portal of WCR |
CM5 |
OSC2 |
Area 72 –
Ocean Shores |
CM6 |
65C2 |
Area 65 –
Site 65C – Planned School Area |
CM7 |
N14 |
Area 86 – MTRC Area 86 Development |
(i)
at
locations close to the major site activities which are likely to have noise
impacts;
(ii)
close
to the noise sensitive receivers; and
(iii)
for
monitoring locations located in the vicinity of the sensitive receivers, care
shall be taken to cause minimal disturbance to the occupants during monitoring.
Traffic Noise
(i)
they
shall be at NSRs in the vicinity of recommended direct technical remedies;
(ii)
one
high floor and one medium floor monitoring points shall be chosen at each
location as far as possible; and
(iii)
selected
monitoring locations shall enable monitoring to be done twice within one year
after implementation of the mitigation measures during operation of the
proposed road.
Table 3.2 Proposed
Traffic Noise Monitoring Stations
Station |
NSR ID Reference (Based on EIA Report) |
Location |
OM1 |
H10 |
KMS Housing Development at the South of WCR |
OM2 |
H14 |
KMS Housing
Development at the South of WCR |
OM3 |
||
OM4 |
||
OM5 |
(i)
alternative
location shall be similarly exposed to potential noise impacts;
(ii)
shall
be close to the noise sensitive receivers; and
(iii)
shall
be located so as to cause minium disturbance to the occupants.
Fixed Plant Noise
Table 3.3 Proposed
Fixed Noise Monitoring Station
Station |
NSR ID Reference (Based on
EIA Report) |
Location |
FM1 |
V1 |
Village
Houses at North of Eastern Portal of WCR |
(i)
One
set of measurements between 0700 and 1900 hours on normal weekdays.
Traffic Noise
(i)
one
set of measurements at the morning traffic peak hour on normal weekdays;
(ii)
one
set of measurement at the evening traffic peak hour on normal weekdays;
(iii)
a
concurrent census of traffic flow and percentage heavy vehicles shall be
conducted for the far-side and near-side of the road and the existing road
network in the vicinity of each measurement points;
(iv)
average
vehicle speed estimated for far-side and near-side of the road and the existing
road network in the vicinity of each measuring points; and
(v)
the
two sets of monitoring data shall be obtained within the first year of
operation.
Fixed Plant Noise
(i)
Noise
measurements shall be conducted at a time when the ventilations building is
operating at maximum capacity.
Table 3.4 Action
and Limit Levels for Construction Noise
Time Period |
Action Level |
Limit Level |
0700 – 1900
hours on normal weekdays |
When one
documented complaint is received |
75 dB(A) |
Table 3.5 Event
and Action Plan for Construction Noise
EVENT |
ACTION |
|||
|
ET |
IC(E) |
ER |
CONTRACTOR |
Action Level |
1.
Notify IC(E) and Contractor; 2.
Carry out investigation; 3.
Report the results of investigation to the IC(E), ER and Contractor; 4.
Discuss with the Contractor and formulate remedial measures; 5.
Increase monitoring frequency to check mitigation effectiveness. |
1.
Review the analysed results submitted by the ET; 2.
Review the proposed remedial measures by the Contractor and advise
the ER accordingly; 3.
Supervise the implementation of remedial measures. |
1.
Confirm
receipt of notification of failure in writing; 2.
Notify
Contractor; 3.
Require
Contractor to propose remedial measures for the analysed noise problem; 4.
Ensure
remedial measures are properly implemented. |
1. Submit noise mitigation
proposals to IC(E); 2. Implement noise mitigation
proposals. |
Limit Level |
1.
Identify source; 2.
Inform IC(E), ER, EPD and Contractor; 3.
Repeat measurements to confirm findings; 4.
Increase monitoring frequency; 5.
Carry out analysis of Contractor’s working procedures to determine
possible mitigation to be implemented; 6.
Inform IC(E), ER and EPD the causes and actions taken for the
exceedances; 7.
Assess effectiveness of Contractor’s remedial actions and keep IC(E),
EPD and ER informed of the results; 8.
If exceedance stops, cease additional monitoring. |
1.
Discuss amongst ER, ET, and Contractor on the potential remedial
actions; 2.
Review Contractors remedial actions whenever necessary to assure
their effectiveness and advise the ER accordingly; 3.
Supervise the implementation of remedial measures. |
1.
Confirm
receipt of notification of failure in writing; 2.
Notify
Contractor; 3.
Require
Contractor to propose remedial measures for the analysed noise problem; 4.
Ensure
remedial measures properly implemented; 5.
If
exceedance continues, consider what portion of the work is responsible and
instruct the Contractor to stop that portion of work until the exceedance is
abated. |
1.
Take immediate action to avoid further exceedance; 2.
Submit proposals for remedial actions to IC(E) within 3 working days of notification; 3.
Implement the agreed proposals; 4.
Resubmit proposals if problem still not under control; 5.
Stop the relevant portion of works as determined by the ER until the
exceedance is abated. |
Quieter powered mechanical equipment
(a)
TCS,
TKL, PSK & TKOL Development
-
Mobilisation
-
Removal
of Preloading Mound
-
Drains,
Sewers, Waterworks, Utilities and Roadworks for L651, L661, L662, L671, 672,
673, 681, L721 & L722
-
Box
Culvert Realignment
-
Piled
Deck at Western Box Culvert
-
Landscape
Works
-
Rasing
of Existing Seawall (for the work site in vicinity of NSR 65C2 only)
(b)
Engineering
Infrastructure for TKOL
- Northern Cycletrack
Footbridge across EC
- Cycletrack and Footpath along
TKOL
- Southern Footbridge across EC
(for the work site in vicinity of NSRs 65C2 only)
(c)
Western
Coast Road – Reclamation Phase 1
-
Filling
behind seawall
-
Surcharging
and Consolidation (Surcharge Removal)
-
Access
Ramp to Tunnel Portal
(d)
Western
Coast Road – Reclamation Phase 2
-
Surcharging
and Consolidation (Surcharge Removal)
(e)
Western
Coast Road – Toll Plaza and At-grade Roads
-
Road
Embankment
-
Construction
of Concrete Pavement
-
Toolbooths
and footbridge
(f)
Western
Coast Road – Section between Western Portal and Road A
-
Excavation
at Tunnel Portal
-
Site
Formation and construction of New Lam Tin Ambulance Deport
-
Ambulance
Depot Construction
-
Clearance
and Demolition of Ambulance Deport
-
Filling
at ex-EHC Casting Basin
-
Foundation Works for Bridge Abutment and
Piers
-
Bridge Deck Construction
-
Drainage and Utilities Works, at-grade Road
Construction, Roadworks and Signage
-
Installation of noise barriers / enclosures
-
Landscape Works
(g)
Western
Coast Road – Section between Road A and VFP
-
Excavation Works, Cut and Cover tunnel
-
Piling Works, Pile Caps, Columns, Abutment
Construction
-
Bridge Deck Construction
(h)
Cross
Bay Link – Viaduct Section (Bridges A, B & C)
-
Piling Works, Pile Cap & Column, Bridge
Deck and Roadworks, Waterworks & Signage
(i)
Cross
Bay Link – Road Section along Area 86
-
Drainage, Waterworks and Utilities Works
-
Roadworks and Signage, Noise Barrier
Installation and Landscape Works
-
Laying of 300mm diameter Watermain along Wan
Po Road
(j)
WCR/CBL/Road
P2 Interchange
-
Bridge Deck Construction
-
Roadworks and Singnage
-
Natural terrain mitigation works and
Landscape Works
(k)
D4
Flyover
-
Piling Works, Pile Cap & Column
Construction, Bridge Deck Construction
-
Drainage, Waterworks, Utilities, Roadworks
& Noise Barrier Installation
-
Landscape Works
(l)
Road
P2 (Depressed Section)
-
Diaphragm
Wall, Piling Works, Wall & Slab Construction
-
Decking
Construction
-
Pumping
Station Construction
-
Drainage,
Waterworks, Utilities, Roadworks
(m)
Road
P2 (At-Grade Section)
-
Drainage, Waterworks, Utilities Works
-
Road Works & Landscape Works
Movable Noise Barrier
(a)
TCS,
TKL, PSK & TKOL Development
-
Roadworks for L661 & L662 (cantilever
barrier for School “65C3”)
-
Landscape Works
-
Roadworks for L673 and Road L681 (cantilever
barrier for School “67S3” only)
-
Road L681 (for school “65C2”only)
-
Drains Sewers, waterworks, utilities for Road
L661 & L662 (for School “65C3” only)
(b)
Western
Coast Road – Section between Western Portal and Road A
-
Clearance and Demolition of Ambulance Depot
-
Foundation Works for Bridge Abutment and Piers
-
Bridge Deck Construction
-
Roadworks & Signage and Noise barrier
/enclosure installation
-
Excavation at Tunnel portal (for School “StA”
only)
-
Site formation for New Lam Tin Ambulance
Report (for “StA” only)
-
Filling at ex-EHC Casting Basin (for “StA”
only)
(c)
Western
Coast Road – Section between Road A & VFP
-
Bridge Deck Construction
(d)
Cross
Bay Link – Road Section along Area 86
-
Noise Barrier Installation
-
Laying of 300mm diameter watermain along Wan
Po Road
(e) D4
Flyover
-
Pile Cap & Column Construction
-
Bridge Deck Construction
-
Roadworks and Noise Barrier Installation
(f) Road P2 (Depressed Section)
-
Diagraph Wall, Piling Works, Wall & Slab
Construction
-
Decking Construction
-
Pumping Station Construction
-
Roadworks
(g) Road P2 (At-grade Section)
-
Roadworks
Good Site Practice
· The contractor should site noisy equipment and activities as far from sensitive receivers as is practical.
· Intermittent noisy activities should be scheduled to minimize exposure of nearby NSRs to high levels of construction noise.
· Idle equipment should be turned off or throttled down.
· Noisy equipment should be properly maintained and used no more often than is necessary.
· Construction activities should be planned so that parallel operation of several sets of equipment close to a given receiver is avoided.
· Where possible, the numbers of concurrently operating items of plant should be reduced through sensitive programming.
· A noise monitoring programme should be instigated.
The Contractor
shall establish a communication channel with the nearest NSRs to liaise on the
blasting schedule and inform them any scheduled blasting in advance.
Sufficient time
shall be allowed for alerting all the potential sensitive receivers through
established channel of communication prior to each and every blasting activity.
Proper
procedures shall be put in place to alert and minimise any startling effect on
the vehicle drivers and pedestrians.
Subject to
detailed design to be conducted by the Contractor (i.e. a Design and Built
Contractor), trial tests could be conducted to evaluate the optimal amount of
charge to be used for each blasting.
·
Maximum of 50 m setback from site boundary facing Wan Po Road and junction of Wan
Po Road and Road L781.
·
10 m setback from the footpath of
Road L781 for Area 78A, 78B & 78E.
·
5 m high boundary wall at the site boundary of
Area 78E facing Wan Po Road and Road L781.
·
A
100 m long cantilevered barrier, 5.5L6 (5.5 m high vertical barrier with 4 m
cantilever length at 45 degrees), located at at-grade Road L861.
·
A
30 m long cantilevered barrier, 5.5L3 (5.5 m high vertical barrier with 4.5m
cantilever length at 45 degrees), located at at-grade Road L861.
·
Low noise surfacing on at-grade Road L861
eastbound and westbound (~ 230 m in length).
·
A
200 m long and 3 m high vertical barrier, along the edge of the parapet of the
eastbound carriageway of Road D4 Flyover (CH230 – CH430) for NSRs at Area 57.
·
10 - 15 m
setback from the footpath of Chi Shin Street for Area 65 - Site 65B (R2) and
also Site 65C (OU).
·
3
m high boundary wall for planned schools at Area 67 and Area 74S (standard
measures according to Class Assessment Document prepared by Arch SD).
·
15
m setback from the footpath of Tong Chun Street for Area 66 – Site 66D.
·
15
m setback from the footpath of Road L673 for Area 67.
Direct Noise Mitigation Measures on Kowloon Section
of the WCR
·Low-noise road surfacing material on part of the
WCR, slip road S2 to S4 and part of Cha Kwo Ling Road including roundabout of
Cha Kwo Ling Road to Road A.
·A 210 m long cantilevered barrier, L2 (6 m high vertical barrier with 3.5 m
horizontal cantilever length), located at the edge of the parapet of the
eastbound carriageway of the WCR (~ CH 4220 – CH4430).
·A 120 m long partial enclosure (6 m high) for the
eastbound carriageway of the WCR (CH4430 – CH4550).
·A 270 m long full enclosure (6 m high) for both carriageways
of the WCR (CH4450 – CH4720).
·Two 80 m long cantilevered barriers, L1 (6 m high
vertical barrier with 5 m horizontal cantilever length), located at both edges
of the parapet of the two carriageways of the WCR (CH4720 – CH4800).
·A 40 m long full enclosure (6m high) for both
carriageways of the WCR (CH4800 – CH4840).
·A 100 m long full enclosure (5.5m high) for both
carriageways of the WCR (CH4900 – CH5000).
·A 416 m long partial enclosure (5.5 m high)
covering both carriageways, located at the edge of parapet of the westbound
carriageway of the WCR (CH5100 – CH5516).
·A 250 m long cantilevered barrier, L4 (5.5 m high vertical barrier with 3 m
cantilever length at 45° to the horizontal), located at the edge of the parapet
of the west of the Slip Road EHC 2 (~ CH 070 – CH 320).
·A 300 m long cantilevered barrier, L3 (5.5 m high vertical barrier with 3.5 m
horizontal cantilever length), located at the edge of the parapet of the west
of the Slip Road EHC 3 (~ CH 100 – CH 400).
·A 7 m high partial enclosure covering both
carriageways of Road A (CH 530 – CH 650) instead of the 130 m long cantilevered
barrier (CNB-A) of Road A, which was proposed in the “Feasibility Study for
Development at CKL Kaolin Mine Site”.
Noise Mitigation Measures on TKO Areas
·Low-noise road surfacing materials for carriageways
of Road L651 between Po Yap Road and Chi Shin Street (~110m in length, CH490
–CH600).
·Low-noise road surfacing materials for carriageways
of Road P2 (CH 8970 – CH9370).
·A 200 m long and 3 m high vertical barrier, along
the edge of the parapet of the eastbound carriageway of road P2 flyover (CH230
– CH430).
·10m setback from Chi Shin Street for Area 65 – Site
65B (R2) and also Site 65c (OU).
·Proposed 9 m high podium around boundary for Area
73B (R2 zone) with 5 m setback from Choi Ming Street and 15m setback from Chui
Ling Road above the podium.
·3 m high boundary wall for Educational Institute
Areas (Area 67, Area 73B and Area 74S).
·5 m setback from Tong Chun Street for Area 66 –
Site 66D.
·15 m setback from Road L673 for Area 67.
·Low-noise road surfacing materials for the CBL (CH
8900 – CH9440).
·A 120118 m long
cantilevered barrier (5.5 m high vertical barrier with 3 m cantilever length at
45° to the horizontal), located at the kerb of the eastbound carriageway of CBL
(CH 9150 – CH 927068).
·A 14032 m long
cantilevered barrier (5.5 m high vertical barrier with 41.5 m
cantilever length at 45° to the horizontal), located at the kerb of the
eastbound carriageway of the Road D9CBL (CH 9268728 – CH 9300868).
·A 10016 m long
cantilevered barrier (5.5 m high vertical barrier with 5 m cantilever length at
45° to the horizontal), located at the kerb of the central divider eastbound
carriageway of the CBL (CH 9300 – CH 941600).
·A 20034 m long
cantilevered barrier (5.5 m high vertical barrier with 4.5 m
cantilever length at 45° to the horizontal), located at the
kerb of the eastbound carriagewaythe central divider of Road
D9 (CH 9466500 – CH 9700).
·A 60168 m long
cantilevered barrier (5.5 m high vertical barrier with 5 m cantilever length at
45° to the horizontal), located at the central dividerkerb
of the eastbound carriageway of Road D9 (CH 9700 – CH 9760868).
·A 110
m long cantilevered barrier (5.5 m high vertical barrier with 3 m cantilever
length at 45° to the horizontal), located at the kerb of the eastbound carriageway
of Road D9 (CH 9760 – CH 9870).
·A 30 m long cantilevered barrier (6.5 m high
vertical barrier with 4.5 m cantilever length at 45° to the horizontal),
located at the central divider of the CBL (CH 9270 – CH 9300).
·A 118 m long cantilevered barrier (6.5 m high
vertical barrier with 5 m cantilever length at 45° to the horizontal), located
at the central divider of the CBL (CH 9300 – CH 9418).
·A 152 m long cantilevered barrier (5.5 m high
vertical barrier with 4.5 m cantilever length at 45° to the horizontal),
located at the central divider of Road D9 (CH 9500 – CH 9652).
·A 108 m long cantilevered barrier (5.5 m high
vertical barrier with 5 m cantilever length at 45° to the horizontal), located
at the central divider of the CBL (CH 9652 – CH 9760).
·A 110 m long cantilevered barrier (5.5 m high
vertical barrier with 4.5 m cantilever length at 45° to the horizontal),
located at the central divider of the CBL (CH 9760 – CH 9870).
·A 80 m long cantilevered barrier (5.5 m high
vertical barrier with 4 m cantilever length at 45° to the horizontal), located
at Road L861 westbound (CH 3740 – CH 4504).
Noise Mitigation Measures on Pak Shing Kok
·Only allow for + 73 mPD high building (about 2
storey) if it has at least 10 m setback.
·Only allow for +78.6 mPD high building (about 4
storeys) if it has at least 20 m setback.
·Only allow for +87.0 mPD high building (about 6
storeys) if it has at least 40 m setback.
·Only allow for +89.8 mPD high building (about 8
storeys) if it has at least 50 m setback.
·
Low-noise road surfacing material on slip road
S2 to S4 of WCR, part of Cha Kwo Ling Road and part of Road A near WCR.
·
A
210 m long cantilevered barrier, 6L2 (6
m high vertical barrier with 3.5 m horizontal cantilever length), located at
the edge of the parapet of the eastbound carriageway of the WCR (~ CH 4220 –
CH4430).
·
A
105 m long partial enclosure (6 m high) for the
eastbound carriageway of the WCR (CH4430 – CH4535).
·
A
285 m long full enclosure (6 m high) for both carriageways of the WCR (CH4435 –
CH4720).
·
Two
80 m long cantilevered barriers, 6L1 (6 m high vertical barrier with 5 m
horizontal cantilever length), located at both edges of the parapet of the two
carriageways of the WCR (CH4720 – CH4800).
·
A
40 m long full enclosure (6m high) for both carriageways of the WCR (CH4800 –
CH4840).
·
A
100 m long full enclosure (5.5m high) for both carriageways of the WCR (CH4900
– CH5000).
·
A
460 m long partial enclosure (5.5 m high) covering both
carriageways, located at the edge of parapet of the westbound carriageway of
the WCR (CH5056 – CH5516).
·
A
250 m long cantilevered barrier, 5.5L1 (5.5 m high vertical barrier with 3 m
cantilever length at 45° to the horizontal), located at the edge of the parapet
of the west of the Slip Road EHC 2 (~ CH 070 – CH 320).
·
A
70 m long cantilevered barrier, 5.5L2 (5.5 m high vertical barrier with 3.5 m
horizontal cantilever length), located at the edge of the parapet of the west
of the Slip Road EHC 3 (~ CH 100 – CH 170).
·
A
235 m long partial enclosure (5.5 m high) for the Slip Road EHC 3 (~CH 170 – CH
405)
·
A 7 m high partial enclosure covering both
carriageways of Road A (CH 530 – CH 650) instead of the 130 m long cantilevered barrier (CNB-A) of Road
A, which was proposed in the “Feasibility Study for Development at CKL Kaolin
Mine Site”.
·
A 65 m long and 3 m high vertical transparent
barrier, with a setback distance from Cha Kwo Ling Road Roundabout. The installation of the barrier is subject
to any objection from the temple owner, AMO and DO.
·
A
120 m long cantilevered barrier, 5.5L1 (5.5 m high vertical barrier with 3 m
cantilever length at 45° to the horizontal), located at the kerb of the
eastbound carriageway of CBL (CH 9150 – CH 9270).
·
A
140 m long cantilevered barrier, 5.5L5 (5.5 m high vertical barrier with 1.5 m
cantilever length at 45° to the horizontal), located at the kerb of the
eastbound carriageway of the CBL (CH 9728 – CH 9868).
·
A
100 m long cantilevered barrier, 5.5L4 (5.5 m high vertical barrier with 5 m
cantilever length at 45° to the horizontal), located at the central divider of
CBL (CH 9300 – CH 9400).
·
A
200 m long cantilevered barrier, 5.5L3 (5.5 m high vertical barrier with 4.5 m
cantilever length at 45° to the horizontal), located at the central divider of
CBL (CH 9500 – CH 9700).
·
A
168 m long cantilevered barrier, 5.5L4 (5.5 m high vertical barrier with 5 m
cantilever length at 45° to the horizontal), located at the central divider of
CBL (CH 9700 – CH 9868).
·
Area
78A, 78C, 78E – 10 m setback from site boundary
·
Area
65B, 65C, – at site boundary/5 m from site boundary
·
Area
66B, 66C, 66D – 5 m setback from site boundary / boundary of breezeway
·
Area
78 – 10m setback from site boundary
·
Area
74S – 5m setback from site boundary
·
Area
67 – at site boundary/5 m from site boundary