Construction Activities undertaken  

·         Socket H-piles for underpinning of existing pile cap & tam grouting at Yau Ma Tei Police Station (YMTPS)

·         Construction of D-wall panels (31 panels) at Zone B

·         Site formation, predrilling, remedial works for land contamination, grout curtain wall & guide wall & D-wall at Zone B

·         Construction of Stage 3 D-wall panels, soil improvement works, sheet piling at Zone C

·         Predrilling, guide wall & D-wall panels and pipe piles, pre-boring & transfer beams at Zone D

·         Diversion of DN900 Sewer Pipes (ELS, Excavation and Pipe Laying) along Kansu Street at Zone F/B3

·         Predrilling, pipe piles & divert DN450 watermain & DN1800 Drainage at Zone G

·         ELS, Excavation and Construction of Pad Footing, Piers and Portal Frame for Reprovision of Gascoigne Road Flyover (RGRF)

·         Construct bridge deck for 2 spans at Gascoigne Road flyover.

·         Construct socketed Hpiles, pile caps, ground beams and RC columns of Noise Enclosure at Zone D

W-N1A, W-P11, W-N18, W-N25A

5 times

W-A1

W-A6

5 times

5 times

W-A1, W-A6

15 times

·         Excavation /ELS Works below ceiling slab at Zone A.

·         Continue excavation works including installation of waling/strut to tunnel roof slab level, lagging wall construction, roof slab construction at Zone B.

·         Pipe piles construction in lieu of D-wall for P35 & P36 at EB2 of Zone B.

·         TAM grouting between Zones B2 & C1, install king posts, excavate and construct temporary buttress wall at Zones C1/C2 & C3 and strengthen the joints of 1800mm HDPE pipes at C3, excavation to roof slab and construct part of roof slab at C3 for Pier P2L construction.

·         Construction of pier head for P4L/P4R, D-wall, utilities diversion works, buttress wall and installation of king posts at Zone D.

·         Complete trench excavation for DN450 FW/SW watermains diversion by WSD at Zone B3.

·         Excavation to tunnel roof slab and Partial Demolition of Cable Tunnel A (coring for temporary access) and commence works for Oil Interceptor & Fuel Tank inside CLP Station at Zone F.

·         Continue for diversion work of DN1800 drainage (stage 1) such as pipe laying install waling/strut, delivery & installation of pre-fabricated temporary manhole at Zone G.

·         Works for RGRF at HKAA area: Construction of end-span at P8L, install temporary support & construction of Portal Frame over Piers P7L and P7R and installation of temporary support for demolition of GRF Portion 1 (existing 3 beams).

·         Bridge Works:

                           i.          Pier head construction for P4L/P4R and P6L.

                         ii.          Relocate FT1 to pier P4L and commence FT1-2 Assembly on P4L.

                       iii.          Pier construction for P1L and P3L.

                        iv.          Modification of traffic island at east end (above temple street)

·         Continue socketed H-piling works for middle/east foundation and west side of Zone 3 F02 Noise Enclosure, ELS works for pile cap construction for middle/east foundation for F02 Noise Enclosure.

·         Continue parapet modification works for Noise Enclosure at Zone 3 on the bridge deck of FSF.

·         Works at Zone 2 Noise Enclosure scheduled as following:

                           i.          Column E - Permanent socketed H-piling works;

                         ii.          Column G - Utilities diversion works;

                       iii.          Column C - Trial Pit Excavation commence temporary socketed H-piling works;

                        iv.          Column A - Complete trial pit excavation / predrilling works and commence temporary diversion of DN 150 Strom Drainage.

·         Monitoring of instrumentation for all areas.

Construction Activities undertaken

·         Socket H-piles for underpinning of existing pile cap & tam grouting at Yau Ma Tei Police Station (YMTPS)

·         Construction of D-wall panels (31 panels) at Zone B

·         Site formation, predrilling, remedial works for land contamination, grout curtain wall & guide wall & D-wall at Zone B

·         Construction of Stage 3 D-wall panels, soil improvement works, sheet piling at Zone C

·         Predrilling, guide wall & D-wall panels and pipe piles, pre-boring & transfer beams at Zone D

·         Diversion of DN900 Sewer Pipes (ELS, Excavation and Pipe Laying) along Kansu Street at Zone F/B3

·         Predrilling, pipe piles & divert DN450 watermain & DN1800 Drainage at Zone G

·         ELS, Excavation and Construction of Pad Footing, Piers and Portal Frame for Reprovision of Gascoigne Road Flyover (RGRF)

·         Construct bridge deck for 2 spans at Gascoigne Road flyover.

·         Construct socketed Hpiles, pile caps, ground beams and RC columns of Noise Enclosure at Zone D

Environmental Permit

EP-457/2013/D

15 Jun 2021

End of Project

Valid

-

Further Environmental Permit

FEP-03/457/2013/D

5 Nov 2021

End of Project

Valid

Wastewater Discharge License

WT00030660-2018

28 Mar 2018

31 Mar 2023

Valid

-

Notification of Construction Works under the Air Pollution Control (Construction Dust) Regulation

471691

14 Sep 2021

End of Project

Notified

-

Chemical Waste Producer Registration

WPN5213-225-B2526-01

14 Mar 2018

End of Project

Valid

-

Billing Account for Disposal of Construction Waste

7029997

1 Feb 2018

End of Project

Valid

-

Construction Noise Permit

GW-RE1171-21

25 Nov 2021

22 Apr 2022

Valid

Construction Noise Permit at Jade Hawker Bazaar Building

GW-RE1038-21

30 Dec 2021

29 Mar 2022

Valid

Construction Noise Permit for D-wall at Zone B2

GW-RE1094-21

2 Nov 2021

1 May 2022

Valid

Construction Noise Permit at Zone D & G

GW-RE1095-21

2 Nov 2021

1 May 2022

Valid

Construction Noise Permit at Multi-storey Carpark Building

GW-RE1093-21

2 Nov 2021

1 May 2022

Valid

Construction Noise Permit at Zone A & B

GW-RE0881-21

10 Sep 2021

9 Mar 2022

Valid

Construction Noise Permit at Zone 3

GW-RE1240-21

15 Dec 2021

14 Feb 2022

Valid until

14 Feb 2022

Construction Noise Permit for Bridge Works at Shanghai Street

GW-RE1315-21

4 Jan 2022

25 Feb 2022

Valid until

25 Feb 2022

Construction Noise Permit for Formtraveller Assembly and Launching at Reclamation Street

GW-RE0087-22

28 Jan 2022

27 Apr 2022

Valid

Construction Noise Permit at Zone D & P4

GW-RE0054-22

28 Jan 2022

27 Apr 2022

Valid

Construction Noise Permit at P6

GW-RE0093-22

28 Jan 2022

27 Apr 2022

Valid

Construction Noise Permit at Multi-storey Carpark Building

GW-RE0129-22

15 Feb 2022

31 Mar 2022

Valid from

15 Feb 2022

Construction Noise Permit for Central Divider Removal at GRF

Marine Dumping Permit

EP/MD/22-091

23 Dec 2021

22 Jun 2022

Valid

Type 1- Open Sea Disposal

EP/MD/22-109

31 Jan 2022

28 Feb 2022

Valid until

28 Feb 2022

Type 1- Open Sea Disposal (Dedicated Site) & Type 2 - Confined Marine Disposal)

EP/FEP Condition

(EP-457/2013/D)

(FEP-03/457/2013/D)

Submission

Submission date

Condition 3.4

Monthly EM&A Report (Jan 2022)

14 Feb 2022

·         Socket H-piles for underpinning of existing pile cap & tam grouting at YMTPS

· Completed

·         Construction of D-wall panels at Zone B

· Completed

·         Site formation, predrilling, remedial works for land contamination, grout curtain wall & guide wall & D-wall at Zone B

· 95% completion

·         Construction of Stage 3 D-wall panels, soil improvement works, sheet piling at Zone C

· 99% completion

·         Predrilling, guide wall, D-wall and pipe piles at Zone D

· 90% completion

·         Diversion of DN900 Sewer Pipes (ELS, Excavation and Pipe Laying) along Kansu Street at Zone F/B3

· 82% completion

·         Predrilling, pipe piles & divert DN450 watermain & DN1800 Drainage at Zone G

· 70% completion

·         ELS, Excavation and Construction of Pad Footing, Piers and Portal Frame for RGRF

· 90% completion

·         Construct bridge deck for 2 spans at Gascoigne Road flyover

· 50% completion

·         Construct socketed H piles, pile caps, ground beams and RC columns of Noise Enclosure at Zone D

· 40% completion

Monitoring Location

Location ID

Latitude

Longitude

Yau Ma Tei Catholic Primary School (Hoi Wang Road)

W-A1/ W-N1A

22.313357

114.16409

Man Cheong Building

W-A6

22.308185

114.166033

Hydan Place

W-N18

22.30858

114.170185

Prosperous Garden Block 1

W-N25A

22.309846

114.168072

The Coronation Tower 1

W-P11

22.309824

114.165616

Monitoring Parameter

Monitoring Equipment

Serial Number

Date of Calibration

1-hour TSP

LD-5R Digital Dust Indicator

992821

19 Sep 2021

LD-5R Digital Dust Indicator

851819

1 Jul 2021

24-hour TSP

TE-5170X High Volume Sampler

1084

5 Feb 2022 and 22 Feb 2022

TE-5170X High Volume Sampler

1050

5 Feb 2022 and 22 Feb 2022

TE-5028A Calibration Kit

3702

3 Aug 2021

Monitoring Equipment

Serial Number

Date of Calibration

Nti XL2 Sound Level Meter

A2A-13661-E0

23 Sep 2021

RION NL-31 Sound Level Meter

00303811

27 Apr 2021

Pulsar 105 Acoustic Calibrator

63705

7 Aug 2021

Air Quality Monitoring Station

Dust Monitoring
Station

W-A1

Yau Ma Tei Catholic Primary School (Hoi Wang Road)

W-A6

Man Cheong Building

Noise

Monitoring Station

Identified Noise

Monitoring Station

Type of Measurement

W-N1A

Yau Ma Tei Catholic Primary School (Hoi Wang Road)

Façade

W-N18

Hydan Place

Façade

W-N25A

Prosperous Garden Block 1

Façade

W-P11

The Coronation Tower 1

Façade

Dust

1-hour continuous measurement

1-hour TSP

3 times per six days

Dust

24-hour continuous sampling

24-hour TSP

Once per six days

Noise

30-minute continuous measurement

L_{eq 30 min},

L₁₀ and L₉₀ as reference.

Once per week (0700 – 1900)

Remarks:

1.      # If works are to be carried out during restricted hours, the conditions stipulated in the construction noise permit by the Noise Control Authority have to be followed.

Reporting period

Quantity

Inert C&D Materials

(in ‘tonnes)

Chemical Waste

(in‘000 Kg)

Non-inert C&D Materials

 Others, e.g. General Refuse disposed at Landfill

(in ‘tonnes)

Recycled materials

Paper/card board

(in ‘000 Kg)

Plastics

(in ‘000 Kg)

Metals

(in ‘000 Kg )

Feb-2022

1608.50

0.00

23.50

0.60

0.00

0.00

Complaint Received via Project Hotline

Complaint Received via 1823 or from other government departments

Contractor notify ER, ET and IEC

ER notify Contractor, ET and IEC

Contractor log complaint and date of receipt onto the complaint database. Contractor, ER and ET to conduct investigation of complaint

If complaint is considered not valid

If complaint is found valid

ET or ER to reply the complainant if necessary

Contractor to identify and implement remedial measures in consultation with the IEC, ET and ER.

The ER, ET and IEC to review the effectiveness of the Contractor's remedial measures and the updated situation; ET to undertake additional monitoring and audit to verify the situation if necessary, and oversee that circumstances leading to the complaint do not recur. ER to conduct further inspection as necessary.   

 If the complaint is referred by the EPD, the Contractor to prepare interim report on the status of the complaint investigation and follow-up actions stipulated above, including the details of the remedial measures and additional monitoring identified or already taken, for submission to EPD within the time frame assigned by the EPD

The ET to record the details of the complaint, results of the investigation, subsequent actions taken to address the complaint and updated situation including the effectiveness of the remedial measures, supported by regular and additional monitoring results in the monthly EM&A reports

Date

Environmental Observations

Follow-up Status

10 February 2022

No major observation was found during site inspection.

-

17 February 2022

No major observation was found during site inspection.

-

24 February 2022

No major observation was found during site inspection.

-

ACTION LEVEL

1.Exceedance for one sample

1. Identify source, investigate the causes of exceedance and propose remedial measures;

2. Inform IEC and ER;

3. Repeat measurement to confirm finding;

4. Increase monitoring frequency to daily.

1. Check monitoring data submitted by ET;

2. Check Contractor’s working method.

1. Notify Contractor.

1. Rectify any unacceptable practice;

2. Amend working methods if appropriate.

2.Exceedance for two or more consecutive samples

1. Identify source;

2. Inform IEC and ER;

3. Advise the ER on the effectiveness of the proposed remedial measures;

4. Repeat measurements to confirm findings;

5. Increase monitoring frequency to daily;

6. Discuss with IEC and Contractor on remedial actions required;

7. If exceedance continues, arrange meeting with IEC and ER;

8. If exceedance stops, cease additional monitoring.

1. Check monitoring data submitted by ET;

2. Check Contractor’s working method;

3. Discuss with ET and Contractor on possible remedial measures;

4. Advise the ET on the effectiveness of the proposed remedial measures;

5. Supervise Implementation of remedial measures.

1. Confirm receipt of notification of failure in writing;

2. Notify Contractor;

3. Ensure remedial measures properly implemented.

1. Submit proposals for remedial to ER within 3 working days of notification;

2. Implement the agreed proposals;

3. Amend proposal if appropriate.

LIMIT LEVEL

1.Exceedance for one sample

1. Identify source, investigate the causes of exceedance and propose remedial measures;

2. Inform ER, Contractor and EPD;

3. Repeat measurement to confirm finding;

4. Increase monitoring frequency to daily;

5. Assess effectiveness of Contractor’s remedial actions and keep IEC, EPD and ER informed of the results.

1. Check monitoring data submitted by ET;

2. Check Contractor’s working method;

3. Discuss with ET and Contractor on possible remedial measures;

4. Advise the ER on the effectiveness of the proposed remedial measures;

5. Supervise implementation of remedial measures.

1. Confirm receipt of notification of failure in writing;

2. Notify Contractor;

3. Ensure remedial measures properly implemented.

1. Take immediate action to avoid further exceedance;

2. Submit proposals for remedial actions to IEC within 3 working days of notification;

Implement the agreed proposals;

4. Amend proposal if appropriate.

2.Exceedance for two or more consecutive samples

1. Notify IEC, ER, Contractor and EPD;

2. Identify source;

3. Repeat measurement to confirm findings;

4. Increase monitoring frequency to daily;

5. Carry out analysis of Contractor’s working procedures to determine possible mitigation to be implemented;

6. Arrange meeting with IEC and ER to discuss the remedial actions to be taken;

7. Assess effectiveness of Contractor’s remedial actions and keep IEC, 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 Contractor’s 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. In consultation with the IEC, agree with the Contractor on the remedial measures to be implemented;

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 IEC 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.

Action Level

1. Identify source, investigate the causes of exceedance and propose remedial measures;

2. Notify IEC and Contractor;

3. Report the results of investigation to the IEC, 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 IEC;

2. Implement noise mitigation proposals.

Limit Level

1. Identify source;

2. Inform IEC, 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 IEC, ER and EPD the causes and actions taken for the exceedances;

7. Assess effectiveness of Contractor’s remedial actions and keep IEC, 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 IEC  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.

Construction Dust Impact

S4.3.10

D1

The contractor shall follow the procedures and requirements given in the Air Pollution Control (Construction Dust) Regulation

Minimize dust impact at the nearby sensitive receivers

Contractor

All construction sites

Construction stage

·    APCO

·    To control the dust impact To meet HKAQO and TM-EIA criteria

·   Implemented

S4.3.10

D2

·  Mitigation measures in form of regular watering under a good site practice should be adopted.  Watering once per hour on exposed worksites and haul road should be conducted to achieve dust removal efficiencies of 91.7%.  While the above watering frequencies are to be followed, the extent of watering may vary depending on actual site conditions but should be sufficient to maintain an equivalent intensity of no less than 1.3 L/m² to achieve the dust removal efficiency.

Minimize dust impact at the nearby sensitive receivers

Contractor

All construction sites

Construction stage

·   APCO

·   To control the dust impact To meet HKAQO and TM-EIA criteria

·   Implemented

S4.3.10

D3

·     Proper watering at exposed spoil should be undertaken throughout the construction phase;

·     Any excavated or stockpile of dusty material should be covered entirely by impervious sheeting or sprayed with water to maintain the entire surface wet and then removed or backfilled or reinstated where practicable within 24 hours of the excavation or unloading;

·     Any dusty materials remaining after a stockpile is removed should be wetted with water and cleared from the surface of roads;

·     A stockpile of dusty material should not be extended beyond the pedestrian barriers, fencing or traffic cones;

·     The load of dusty materials on a vehicle leaving a construction site should be covered entirely by impervious sheeting to ensure that the dusty materials do not leak from the vehicle.

·     Where practicable, vehicle washing facilities with high pressure water jet should be provided at every discernible or designated vehicle exit point.  The area where vehicle washing takes place and the road section between the washing facilities and the exit point should be paved with concrete, bituminous materials or hardcores;

·     When there are open excavation and reinstatement works, hoarding of not less than 2.4m high should be provided and properly maintained as far as practicable along the site boundary with provision for public crossing.  Good site practice shall also be adopted by the Contractor to ensure the conditions of the hoardings are properly maintained throughout the construction period;

·     The portion of any road leading only to construction site that is within 30m of a vehicle entrance or exit should be kept clear of dusty materials;

·     Surfaces where any pneumatic or power-driven drilling, cutting, polishing or other mechanical breaking operation takes place should be sprayed with water or a dust suppression chemical continuously;

·     Any area that involves demolition activities should be sprayed with water or a dust suppression chemical immediately prior to, during and immediately after the activities so as to maintain the entire surface wet;

·      Any skip hoist for material transport should be totally enclosed by impervious sheeting;

·      Every stock of more than 20 bags of cement or dry-pulverised fuel ash (PFA) should be covered entirely by impervious sheeting or placed in an area sheltered on the top and the 3 sides;

·      Loading, unloading, transfer, handling or storage of bulk cement or dry PFA should be carried out in a totally enclosed system or facility, and any vent or exhaust should be fitted with an effective fabric filter or equivalent air pollution control system

·      Exposed earth should be properly treated by compaction, turfing, hydroseeding, vegetation planting or sealing with latex, vinyl, bitumen, shotcrete or other suitable surface stabilizer within six months after the last construction activity on the construction site or part of the construction site where the exposed earth lies.

Minimize dust impact at the nearby sensitive receivers

Contractor

All construction sites

Construction stage

·   APCO

·   To control the dust impact To meet HKAQO and TM-EIA criteria

·   Implemented

S4.3.10

D6

Implement regular dust monitoring under EM&A programme during the construction stage.

Monitoring of dust impact

Contractor

Selected rep. dust monitoring station

Construction stage

·   TM-EIA

·   Implemented

Construction Noise (Airborne)

S5.4.1

N1

Implement the following good site practices:

·   Only well-maintained plant should be operated on-site and plant should be serviced regularly during the construction programme;

·   Machines and plant (such as trucks, cranes) that may be in intermittent use should be shut down between work periods or should be throttled down to a minimum;

·   Plant known to emit noise strongly in one direction, where possible, be orientated so that the noise is directed away from nearby NSRs;

·   Silencers or mufflers on construction equipment should be properly fitted and maintained during the construction works;

·   Mobile plant should be sited as far away from NSRs as possible and practicable;

·   Material stockpiles, mobile container site office and other structures should be effectively utilized, where practicable, to screen noise from on-site construction activities.

Control construction airborne noise

Contractor

All construction sites

Construction stage

·   Annex 5, TM-EIAO

·   Implemented

S5.4.1

N2

Install temporary hoarding located on the site boundaries between noisy construction activities and NSRs.  The conditions of hoardings shall be properly maintained throughout the construction period.

Reduce the construction noise levels at low-level zone of NSRs through partial screening

Contractor

All construction sites

Construction stage

·   Annex 5, TM-EIAO

·   Implemented

S5.4.1

N3

Install movable noise barriers (typical design is wooden framed barrier with a small-cantilevered on a skid footing with 25mm thick internal sound absorptive lining), acoustic mat or full enclosure, screen the noisy plants including air compressors, generators and handheld breakers, etc.

Sreen the noisy plant items to be used at all construction sites

Contractor

All construction sites where practicable

Construction stage

·   Annex 5, TM-EIAO

·   Implemented

S5.4.1

N4

Use ‘Quiet plant’

Reduce the noise levels of plant items

Contractor

All construction sites where practicable

Construction stage

·   Annex 5, TM-EIAO

·   Implemented

S5.4.1

N5

Loading/ unloading activities should be carried out inside the full enclosure of mucking out points.

Reduce the noise levels of loading/ unloading activities

Contractor

Mucking out locations

Construction stage

·   Annex 5, TM-EIAO

·   Implemented

S5.4.1

N6

Sequencing operation of construction plants where practicable.

Operate sequentially within the same work site to reduce the construction airborne noise

Contractor

All construction sites where practicable

Construction stage

·   Annex 5, TM-EIAO

·   Implemented

S5.4.1

N7

Implement a noise monitoring programme under EM&A programme.

Monitor the construction noise levels at the selected representative locations

Contractor

Selected rep. noise monitoring station

Construction stage

·   TM-EIAO

·   Implemented

Water Quality (Construction Phase)

S6.9.1.1

W1

In accordance with the Practice Note for Professional Persons on Construction Site Drainage, Environmental Protection Department, 1994 (ProPECC PN1/94), construction phase mitigation measures shall include the following:

Construction Runoff

·   At the start of site establishment, perimeter cut-off drains to direct off-site water around the site should be constructed with internal drainage works and erosion and sedimentation control facilities implemented.  Channels (both temporary and permanent drainage pipes and culverts), earth bunds or sand bag barriers should be provided on site to direct stormwater to silt removal facilities.  The design of the temporary on-site drainage system will be undertaken by the contractor prior to the commencement of construction;

·   The dikes or embankments for flood protection should be implemented around the boundaries of earthwork areas.  Temporary ditches should be provided to facilitate the runoff discharge into an appropriate watercourse, through a silt/ sediment trap.  The sediment/ silt traps should be incorporated in the permanent drainage channels to enhance deposition rates;

·   The design of efficient silt removal facilities should be based on the guidelines in Appendix A1 of ProPECC PN 1/94, which states that the retention time for silt/ sand traps should be 5 minutes under maximum flow conditions.  Sizes may vary depending upon the flow rate, but for a flow rate of 0.1 m3/s a sedimentation basin of 30 m3 would be required and for a flow rate of 0.5 m3/s the basin would be 150 m3.  The detailed design of the sand/ silt traps shall be undertaken by the contractor prior to the commencement of construction;   

·   All exposed earth areas should be completed and vegetated as soon as possible after earthworks have been completed, or alternatively, within 14 days of the cessation of earthworks where practicable.  Exposed slope surfaces should be covered by tarpaulin or other means;

·   The overall slope of the site should be kept to a minimum to reduce the erosive potential of surface water flows, and all traffic areas and access roads protected by coarse stone ballast.  An additional advantage accruing from the use of crushed stone is the positive traction gained during prolonged periods of inclement weather and the reduction of surface sheet flows;

·   All drainage facilities and erosion and sediment control structures should be regularly inspected and maintained to ensure proper and efficient operation at all times and particularly following rainstorms.  Deposited silt and grit should be removed regularly and disposed of by spreading evenly over stable, vegetated areas;

·   Measures should be taken to minimize the ingress of site drainage into excavations.  If the excavation of trenches in wet periods is necessary, they should be dug and backfilled in short sections wherever practicable.  Water pumped out from trenches or foundation excavations should be discharged into storm drains via silt removal facilities;

·   Open stockpiles of construction materials (for example, aggregates, sand and fill material) of more than 50m3 should be covered with tarpaulin or similar fabric during rainstorms.  Measures should be taken to prevent the washing away of construction materials, soil, silt or debris into any drainage system;

·   Manholes should always be adequately covered and temporarily sealed so as to prevent silt, construction materials or debris being washed into the drainage system and storm runoff being directed into foul sewers;

·   Precautions be taken at any time of year when rainstorms are likely, actions to be taken when a rainstorm is imminent or forecasted, and actions to be taken during or after rainstorms are summarized in Appendix A2 of ProPECC PN 1/94.  Particular attention should be paid to the control of silty surface runoff during storm events, especially for areas located near steep slopes;

·   All vehicles and plant should be cleaned before leaving a construction site to ensure no earth, mud, debris and the like is deposited by them on roads.  An adequately designed and site wheel washing facilities should be provided at every construction site exit where practicable.  Wash-water should have sand and silt settled out and removed at least on a weekly basis to ensure the continued efficiency of the process.  The section of access road leading to, and exiting from, the wheel wash bay to the public road should be paved with sufficient backfall toward the wheel wash bay to prevent vehicle tracking of soil and silty water to public roads and drains;

·   Oil interceptors should be provided in the drainage system downstream of any oil/ fuel pollution sources.  The oil interceptors should be emptied and cleaned regularly to prevent the release of oil and grease into the storm water drainage system after accidental spillage.  A bypass should be provided for the oil interceptors to prevent flushing during heavy rain;

·   Construction solid waste, debris and rubbish on site should be collected, handled and disposed of properly to avoid water quality impacts;

·   All fuel tanks and storage areas should be provided with locks and sited on sealed areas, within bunds of a capacity equal to 110% of the storage capacity of the largest tank to prevent spilled fuel oils from reaching water sensitive receivers nearby;

·   Adopt best management practices;

·   All earth works should be conducted sequentially to limit the amount of construction runoff generated from exposed areas during the wet season (April to September) as far as practicable. 

To minimize water quality impact from the construction site runoff and general construction activities

Contractor

All construction sites where practicable

Construction stage

·   Water Pollution Control Ordinance

·   ProPECC PN 1/94

·   TM-EIAO

·   TM-DSS

·   Implemented

S6.9.1.2

W2

Tunneling Works and Underground Works

·   Cut-&-cover tunneling work should be conducted sequentially to limit the amount of construction runoff generated from exposed areas during the wet season (April to September) as far as practicable.

·   Uncontaminated discharge should pass through sedimentation tanks prior to off-site discharge;

·   The wastewater with a high concentration of SS should be treated (e.g. by sedimentation tanks with sufficient retention time) before discharge.  Oil interceptors would also be required to remove the oil, lubricants and grease from the wastewater;

·   Direct discharge of the bentonite slurry (as a result of D-wall) is not allowed.  It should be reconditioned and reused wherever practicable.  Temporary storage locations (typically a properly closed warehouse) should be provided on site for any unused bentonite that needs to be transported away after all the related construction activities area completed.  The requirements in ProPECC PN 1/94 should be adhered to in the handling and disposal of bentonite slurries.

To minimize construction water quality impact from tunneling works

Contractor

All tunneling portion

Construction stage

·   Water Pollution Control Ordinance

·   ProPECC PN 1/94

·   TM-DSS

·   TM-EIAO

·   Implemented

S6.9.1.3

W3

Sewage Effluent

·    Portable chemical toilets and sewage holding tanks are recommended for handling the construction sewage generated by the workforce.  A licensed contractor should be employed to provide appropriate and adequate portable toilets and be responsible for appropriate disposal and maintenance.

To minimize water quality from sewage effluent

Contractor

All construction sites where practicable

Construction stage

·   Water Pollution Control Ordinance

·   TM-DSS

·   Implemented

S6.9.1.5

W4

Groundwater from Potential Contaminated Area:

·    No direct discharge of groundwater from contaminated areas should be adopted.

·    A discharge license under the WPCO through the Regional Office of EPD for groundwater discharge should be applied. Prior to the excavation works within these potentially contaminated areas, the groundwater quality should be reviewed during the process of discharge license application. The compliance to the Technical Memorandum on Standards for Effluents Discharged into Drainage on Sewerage Systems, Inland and Coastal Waters (TM-DSS) and the existence of prohibited substance should be confirmed. If the review results indicated that the groundwater to be generated from the excavation works would be contaminated, the contaminated groundwater should be either properly treated in compliance with the requirements of the TM-DSS or properly recharged into the ground.

·    If wastewater treatment is deployed, the wastewater treatment unit shall deploy suitable treatment process (e.g. oil interceptor / activated carbon) to reduce the pollution level to an acceptable standard and remove any prohibited substances (e.g. TPH) to undetectable range. All treated effluent from wastewater treatment plant shall meet the requirements as stated in TM-DSS and should be discharged into the foul sewers.

·    If groundwater recharging wells are deployed, recharging wells should be installed as appropriate for recharging the contaminated groundwater back into the ground. The recharging wells should be selected at places where the groundwater quality will not be affected by the recharge operation as indicated in the Section 2.3 of TM-DSS. The baseline groundwater quality shall be determined prior to the selection of the recharge wells, and submit a working plan (including the laboratory analytical results showing the quality of groundwater at the proposed recharge location(s) as well as the pollutant levels of groundwater to be recharged) to EPD for agreement. Pollution levels of groundwater to be recharged shall not be higher than pollutant levels of ambient groundwater at the recharge well. Prior to recharge, any prohibited substances such as TPH products should be removed as necessary by installing the petrol interceptor.

To minimize groundwater quality impact from contaminated area

Contractor

Excavation areas where contamination is found

Construction stage

·   Water Pollution Control Ordinance

·   TM-DSS

·   TM-EIAO

·   Implemented

S6.9.1.6

W6

Accidental Spillage

In order to prevent accidental spillage of chemicals, the following is recommended:

·        All the tanks, containers, storage area should be bunded and the locations should be locked as far as possible from the sensitive watercourse and stormwater drains;

·        The Contractor should register as a chemical waste producer if chemical wastes would be generated.  Storage of chemical waste arising from the construction activities should be stored with suitable labels and warnings.

Disposal of chemical wastes should be conducted in compliance with the requirements as stated in the Waste Disposal (Chemical Waste) (General) Regulation.

To minimize water quality impact from accidental spillage

Contractor

All construction site where practicable

Construction stage

·   Water Pollution Control Ordinance

·   ProPECC PN 1/94

·   TM-EIAO

·   TM-DSS

·   Implemented

Waste Management (Construction Waste)

S7.4.1

WM1

On-site sorting of C&D material

·    Geological assessment should be carried out by competent persons on site during excavation to identify materials which are not suitable to use as aggregate in structural concrete (e.g. volcanic rock, Aplite dyke rock, etc.).  Volcanic rock and Aplite dyke rock should be separated at the source sites as far as practicable and stored at designated stockpile area preventing them from delivering to crushing facilities.  The crushing plant operator should also be reminded to set up measures to prevent unsuitable rock from ending up at concrete batching plants and be turned into concrete for structural use.  Details regarding control measures at source site and crushing facilities should be submitted by the Contractor for the Engineer to review and agree.  In addition, site records should also be kept for the types of rock materials excavated and the traceability of delivery will be ensured with the implementation of Trip Ticket System and enforced by site supervisory staff as stipulated under DEVB TC(W) No. 6/2010 for tracking of the correct delivery to the rock crushing facilities for processing into aggregates.  Alternative disposal option for the reuse of volcanic rock and Aplite Dyke rock, etc. should be explored.

Separation of unsuitable rock from ending up at concrete batching plants and be turned into concrete for structural use

Contractor

All construction sites

Construction stage

·   DEVB (W) No. 6/2010

·   Implemented

S7.5.1

WM2

Construction and Demolition Material

·    Maintain temporary stockpiles and reuse excavated fill material for backfilling and reinstatement;

·    Carry out on-site sorting;

·    Make provisions in the Contract documents to allow and promote the use of recycled aggregates where appropriate;

·    Adopt ‘selective demolition’ technique to demolish the existing structures and facilities with a view to recovering broken concrete effectively for recycling purpose, where possible;

·    Implement a trip-ticket system for each works contract to ensure that the disposal of C&D materials are properly documented and verified; and

·    Implement an enhanced Waste Management Plan similar to ETWBTC (Works) No. 19/2005 – “Environmental Management on Construction Sites” to encourage on-site sorting of C&D materials and to minimize their generation during the course of construction.

Good site practice to minimize the waste generation and recycle the C&D materials as far as practicable so as to reduce the amount for final disposal

Contractor

All construction sites

Construction stage

·   Land (Miscellaneous Provisions) Ordinance

·   Waste Disposal Ordinance

·   ETWB TCW No. 19/2005

·   Implemented

S7.5.1

WM3

C&D Waste

·    Standard formwork or pre-fabrication should be used as far as practicable in order to minimize the arising of C&D materials.  The use of more durable formwork or plastic facing for the construction works should be considered.  Use of wooden hoardings should not be used, as in other projects.  Metal hoarding should be used to enhance the possibility of recycling.  The purchasing of construction materials will be carefully planned in order to avoid over ordering and wastage;

·    The Contractor should recycle as much of the C&D materials as possible on-site. Public fill and C&D waste should be segregated and stored in different containers or skips to enhance reuse or recycling of materials and their proper disposal.  Where practicable, concrete and masonry can be crushed and used as fill.  Steel reinforcement bar can be used by scrap steel mills.  Different areas of the sites should be considered for such segregation and storage.

Good site practice to minimize the waste generation and recycle the C&D materials as far as practicable so as to reduce the amount for final disposal

Contractor

All construction sites

Construction stage

·   Land (Miscellaneous Provisions) Ordinance

·   Waste Disposal Ordinance

·   ETWB TCW No. 19/2005

·   Implemented

S7.5.1

WM5

Land-based Sediment

·    All construction plant and equipment shall be designed and maintained to minimize the risk of silt, sediments, contaminants or other pollutants being released into the water column or deposited in the locations other than designated location;

·    All vessels shall be sized such that adequate draft is maintained between vessels and the sea bed at all states of the tide to ensure that undue turbidity is not generated by turbulence from vessel movement or propeller wash;

·    Before moving the vessels which are used for transporting dredged material, excess material shall be cleaned from the decks and exposed fittings of vessels and the excess materials shall never be dumped into the sea except at the approved locations;

·    Adequate freeboard shall be maintained on barges to ensure that decks are not washed by wave action.

·    The Contractors shall monitor all vessels transporting material to ensure that no dumping outside the approved location takes place. The Contractor shall keep and produce logs and other records to demonstrate compliance and that journeys are consistent with designated locations and copies of such records shall be submitted to the engineers;

·    The Contractors shall comply with the conditions in the dumping licence.

·    All bottom dumping vessels (Hopper barges) shall be fitted with tight fittings seals to their bottom openings to prevent leakage of material;

·    The material shall be placed into the disposal pit by bottom dumping;

·    Contaminated marine mud shall be transported by spit barge of not less than 750m3 capacity and capable of rapid opening and discharge at the disposal site;

·    Discharge shall be undertaken rapidly and the hoppers shall be closed immediately. Material adhering to the sides of the hopper shall not be washed out of the hopper and the hopper shall remain closed until the barge returns to the disposal site.

·    For Type 3 special disposal treatment, sealing of contaminant with geosynthetic containment before dropping designated mud pit would be a possible arrangement. A geosynthetic containment method is a method whereby the sediments are sealed in geosynthetic containers and, the containers would be dropped into the designated contaminated mud pit where they would be covered by further mud disposal and later by the mud pit capping at the disposal site, thereby fulfilling the requirements for fully confined mud disposal.

To control pollution due to marine sediment

Contractor

Along CKR alignment

Construction stage

·   ETWB TCW No. 34/2002

·   Implemented

S7.5.1

WM6

Chemical Waste

·   Chemical waste that is produced, as defined by Schedule 1 of the Waste Disposal (Chemical Waste) (General) Regulation, should be handled in accordance with the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes;

·   Containers used for the storage of chemical wastes should be suitable for the substance they are holding, resistant to corrosion, maintained in a good condition, and securely closed, have a capacity of less than 450 L unless the specification has been approved by EPD, and display a label in English and Chinese in accordance with instructions prescribed in Schedule 2 of the regulation;

·   The storage area for chemical wastes should be clearly labelled and used solely for the storage of chemical waste, enclosed on at least 3 sides, have an impermeable floor and bunding of sufficient capacity to accommodate 110% of the volume of the largest container or 20% of the total volume of waste stored in that area, whichever is the greatest, have adequate ventilation, covered to prevent rainfall entering, and arranged so that incompatible materials are adequately separated;

·   Disposal of chemical waste should be via a licensed waste collector, be to a facility licensed to receive chemical waste, such as the Chemical Waste Treatment Centre which also offers a chemical waste collection service and can supply the necessary storage containers, or be to a reuser of the waste, under approval from EPD. 

Control the chemical waste and ensure proper storage, handling and disposal

Contractor

All construction sites

Construction stage

·   Waste Disposal (Chemical Waste) (General) Regulation

·   Code of Practice on the Packaging, Labelling and Storage of Chemical Waste

·   Implemented

S7.5.1

WM7

General Refuse

·   General refuse generated on-site should be stored in enclosed bins or compaction units separately from construction and chemical wastes;

·   A reputable waste collector should be employed by the Contractor to remove general refuse from the site, separately from construction and chemical wastes, on a daily basis to minimize odour, pest and litter impacts.  Burning of refuse on construction sites is prohibited by law.

·   Aluminum cans are often recovered from the waste stream by individual collectors if they are segregated and made easily accessible.  Separate labelled bins for their deposit should be provided if feasible;

·   Office wastes can be reduced through the recycling of paper if volumes are large enough to warrant collection.  Participation in a local collection scheme should be considered by the Contractor.

Minimize production of the general refuse and avoid odour, pest and litter impacts

Contractor

All construction sites

Construction stage

·   Waste Disposal Ordinance

·   Implemented

Land Contamination

S8.9 & Appendix 8.4

LC2

Excavation of the Contaminated Soil

·   Prior to commencement of the excavation works at the contamination zone, the zone should be clearly marked out on site and the surface levels recorded. Excavation of contaminated material should be undertaken using dedicated earth-moving plant.

·   The excavated contaminated soils would be stockpiled at designated area on site and covered by sheet to prevent dispersion of contamination during stockpiling.

·   The Contractor should pay attention to the selection of suitable groundwater lowering schemes and discharge points if the groundwater table is higher than the contaminated soils during excavation. The Contractor should also obtain a valid Water Pollution Control Ordinance (WPCO) discharge licence from EPD where applicable.

The contaminated soil will be

excavated for on-site reuse

Contractor

PBH4

Prior to commencement of construction works within the contaminated area

·   Practice Guide  (PG) for Investigation and Remediation of Contaminated Land

·   Guidance Notes for Contaminated Land Assessment and Remediation

·   Guidance Manual for Use of Risk-Based Remediation Goals (RBRGs) for Contaminated Land Management

·   Implemented

S8.9 & Appendix 8.4

LC3

·   Following completion of the excavation to the specified depth, at least one sample from the base of the excavation and four samples evenly distributed along the boundary of the excavation shall be taken for a closure assessment testing.  The acceptance criterion is shown below:

·   If the results of analysis below the RBRGs (Public Park), no further excavation will be required.

If the analysis indicates presence of contamination (i.e. noncompliance of the acceptance criteria), further excavation shall be carried out in 0.5m increment vertically and/or horizontally depending on the location(s) of the sample(s) which has exceeded the acceptance criteria. Further sampling shall also be conducted for compliance testing. The process of excavation,

sampling and compliance testing should continue until all contaminated materials are removed and should be supervised by a Land Contamination Specialist.

·   Implemented

Appendix 8.4

LC4

A Remediation Report (RR) to demonstrate adequate clean-up shall be prepared and submitted to EPD for endorsement prior to the commencement of any construction/development works within the sites. No construction/development works shall be carried out prior to the endorsement of the RR by EPD.

·   Implemented

Hazard to Life

S9.18

H1

Blasting activities regarding transport and use of explosives should be supervised and audited by competent site staff to ensure full compliance with the blasting permit conditions.

To ensure that the risks from the proposed explosives handling and transport would be acceptable

Contractor

Works areas at which explosives would be used

Construction stage

·   Dangerous Goods Ordinance

·   N/A

S9.6, para.4

H2

Detonators shall not be transported in the same vehicle with other Category 1 Dangerous Goods.

To reduce the risk of explosion during the transport of cartridged emulsion

Contractor

-

Construction stage

·   Dangerous Goods Ordinance

·   N/A

S9.6, para.8

H3

The explosives delivery trucks should be approved by Mines Division and should meet the regulatory requirements for transport of explosives.

To comply with the requirements for approval of an explosives delivery vehicle

Contractor

-

Construction stage

·   Dangerous Goods Ordinance

·   N/A

S9.10, para.7 and S9.18

H4

Blast cover should be provided for shaft at HMT, and kept closed during blasting.

Provision of blast doors or heavy duty blast curtains should be implemented at the shaft to prevent flyrock and control the air overpressure.

To ensure safe use of explosives

Contractor

Shaft

Construction stage

-

·   N/A

S9.16

H5

Only the required quantity of explosives for a particular blast should be transported to avoid the return.

To reduce risks during explosives transport

Contractor

Works areas at which explosives would be used

Construction stage

-

·   N/A

S9.18

H7

The approved truck dedicated for transport of explosives should comply with the “Guidance Note on Requirements for Approval of an Explosives Delivery Vehicle” issued by CEDD Mines Division.  The truck should be periodically inspected and properly maintained in good operation conditions.  The fuel carried in the fuel tank should be minimized to reduce the duration of fire.  Adequate fire fighting equipment shall be provided, inspected and replaced periodically (e.g. fire extinguishers).

To reduce the risk during explosives transport

Contractor

Works areas of which explosives would be used

Construction stage

·   Dangerous Goods Ordinance

·   N/A

S9.18

H8

The driver and his assistant should be physically healthy, experienced and have good safe driving records.  The driver should hold a proper driving licence for the approved transport truck.  Dedicated training programme and regular road safety briefing sessions/ workshops should be provided to enhance their safe driving attitude and practice.  Smoking should be strictly prohibited.

To reduce the risk during explosives transport

Contractor

Works areas at which explosives would be used

Construction stage

-

·   N/A

S9.18

H9

Emergency response plans in case of road accident should be prepared and implemented.  The driver and his assistant should be familiar with the emergency procedures including evacuation, and proper communication/ fire-fighting equipment should be provided to the driver and his assistant.

To reduce the risk during explosives transport

Contractor

Works areas at which explosives would be used

Construction stage

-

·   N/A

S9.18

H10

Close liaison and communication among Mines Division, Contractors for transport of explosives, and working staff of the blasting should be established.  In case of any change of work schedule leading to cancellation or variation of explosives required, relevant parties should be informed in time to avoid unused explosives at the work sites.

To reduce the risk during explosives transport

Contractor

Works areas at which explosives would be used

Construction stage

-

·   N/A

S9.18

H11

Close liaison and communication with Fire Services Department should be established to reduce the accidental detonation escalated from a fire.  The contractors for transport of explosives should use the preferred transport routes as far as practicable.

To reduce the risk during explosives transport

Contractor

Works areas at which explosives would be used

Construction stage

-

·   N/A

S9.18

H12

Contingency plan should be prepared for transport of explosives under severe weather conditions such as rainstorms and thunderstorms.

To reduce the risk during explosives transport

Contractor

Works areas at which explosives would be used

Construction stage

-

·   N/A

S9.18

H13

For explosive transport, all packages of explosives on the truck should be properly stored in the truck compartment as required.  Packaging of the explosives should remain intact (i.e. damage free) until they are transferred to the blasting site.

To reduce the risk during explosives transport

Contractor

Works areas at which explosives would be used

Construction stage

-

·   N/A

S9.18

H14

Availability of a parking space should be ensured before commencement of transport of explosives.  Location for loading and unloading of explosives should be as close as possible to the shaft.  No hot work should be performed in the vicinity during the time of loading and unloading.

To reduce the risk during explosives transport

Contractor

Works areas at which explosives would be used

Construction stage

-

·   N/A

S9.18

H22

It is recommended to explore to minimize the use of the cartridged emulsion explosives and maximize the use of bulk emulsion explosive as far as practicable.

To reduce the risk during explosives transport

Contractor

Works areas at which explosives would be used

Construction stage

-

·   N/A

S9.18

H24

It is recommended to explore to use smaller explosive charges such as ‘cast boosters’ or ‘mini-cast booster’ instead of cartridged emulsion as primers for bulk emulsion.  This option reduces the quantity of explosives required for transportation for the sections where bulk emulsion will be used.

To reduce the risk during explosives transport

Contractor

Works areas at which explosives would be used

Construction stage

-

·   N/A

Landscape & Visual

S10.10.1 Table 10.11

LV3

Good Site Management

·   Large temporary stockpiles of excavated material shall be covered with unobtrusive sheeting to prevent dust and dirt spreading to adjacent landscape areas and vegetation, and to create a neat and tidy visual appearance.

·   Construction plant and building material shall be orderly and carefully stored in order to create a neat and tidy visual appearance.

Minimize visual impact

Contractor

Within Project site

Construction stage

-

·   Implemented

S10.10.1 Table 10.11

LV4

Screen Hoarding

·   Decorative screen hoarding should be erected to screen the public from the construction area.  It should be designed to be compatible with the existing urban context.

Minimize visual impact

Contractor

Within Project site

Construction stage

-

·   Implemented

S10.10.1 Table 10.11

LV5

Lighting Control during Construction

·   All lighting in the construction site shall be carefully controlled to minimize light pollution and night-time glare to nearby residencies and GIC.  The Contractor shall consider other security measures, which shall minimize the visual impacts.

Minimize visual impact

Contractor

Within Project site

Construction stage

-

·   N/A

S10.10.1 Table 10.11

LV6

Erosion Control

·   The potential for soil erosion shall be reduced by minimizing the extent of vegetation disturbance on site and by providing a protective cover over newly exposed soil.

Minimize landscape impact

Contractor

Within Project site

Construction stage

-

·   N/A

S10.10.1 Table 10.11

LV7

Tree Protection & Preservation

·   Carefully protected during construction.  Tree protection measures will be detailed at the Tree Removal Application stage and plans submitted to the relevant Government Department for approval in due course in accordance with ETWB TC no. 3/2006.

Minimize landscape and visual impact

Contractor

Within Project site

Construction stage

·   ‘Guidelines for Tree Risk Management and Assessment Arrangement on an Area Basis and on a Tree Basis’, Greening, Landscape and Tree Management (GLTM) Section, DEVB

·   Latest recommended horticultural practices from GLTM Section, DEVB

·   Implemented

S10.10.1 Table 10.11

LV8

Tree Transplantation

·   For trees unavoidably affected by the Project that have to be removed, where practical transplantation will be chosen as the top priority method of removal.  If this is not possible or practical compensatory planting will be provided for trees unavoidably felled (See LV10).  For trees unavoidably affected by the Project works that are transplanted, transplantation must be carried out in accordance with ETWB TCW 2/2004 and 3/2006.

Minimize landscape and visual impact

Contractor

Within Project site and designated off-site locations

Prior to Construction stage

·   ETWB TCW 3/2006

·   Latest recommended horticultural practices from Greening, Landscape and Tree Management (GLTM) Section, DEVB

·   ETWB TCW 2/2004

·   N/A

S10.10.1 Table 10.11

LV9

Compensatory Planting

·   For trees unavoidably affected by the Project that have to be removed, where practical transportation will be chosen as the top priority method of removal but if this is not possible or practical compensatory planting will be provided for trees unavoidably felled.  All felled trees shall be compensated for by planting trees to the satisfaction of relevant Government projects.  Required numbers and locations of compensatory trees shall be determined and agreed separately with Government during the Tree Felling Application process under ETWBTC 3/2006.

·   Compensatory tree planting may be incorporated into public open spaces and along roadside amenity areas affected by the construction works and therefore be part of the bigger wider planting plans.  Onsite compensation planting is preferred but if necessary, additional receptor sites outside the Works Area shall be agreed separately with Government during the Tree Felling Application process.

Minimize visual impact and also enhance landscape

Contractor

Within Project site

Construction stage

·   ETWB TCW 3/2006

·   Latest recommended horticultural practices from Greening, Landscape and Tree Management (GLTM) Section, DEVB

·   ETWB TCW 2/2004

·   N/A

Cultural Heritage Impact (Construction Phase)

S11.4.4

CH1

The contractor should be alerted during the construction on the possibility of locating archaeological remains and as a precautionary measure, AMO shall be informed immediately in case of discovery of antiquities or supposed antiquities in the subject sites.

To preserve any cultural heritage items which may be removed and damaged by the excavation

Contractor

During construction works for cut and cover tunnels

Construction stage

·   AMOs requirements

·   Implemented

S12.6.1

CH3

·   Protective covering should be provided for the buildings in the form of plastic sheeting;

·   Buffer zones should be provided between the construction works and the external walls of the buildings and should be as large as site restrictions allow and be marked out by temporary fencing or hoarding;

·   An underpinning scheme is required to transfer the existing column loadings to a deeper rock stratum. The supporting system includes cutting the existing ground floor slab to expose the existing pile caps and then construct transfer beams at both sides of the pile caps. The transfer beams will tie up with the existing caps. Loadings of the transfer beams will be transferred to the rock socket piles installed at the two ends of the beams;

·   The AAA settlement and tilting limit should be 6/8/10 mm and1/2000, 1/1500 and 1/1000;

·   Monitoring of vibration levels will be undertaken during the construction phase and the Alert, Alarm and Action (AAA) vibration limit will be set at 5/6/7.5 mm/s. The monitoring proposal should be sent to AMO for comment;.

·   Regular site inspections and monitoring works will be carried out by the contractor and the monitoring results will be submitted to the resident site staff of HyD to ensure compliance.

Protect the building from damage from construction works

Contractor

Yau Ma Tei Police Station (Old Wing) (CKR-01)

Prior to commencement of and during the construction phase

·   Guidelines for Cultural Heritage Impact Assessment

·   EIAO-TM Annex 10 and Annex 19

·   AMO Proposed Vibration Limits

·   Implemented

S12.6.1

·   Adopting diaphragm wall construction method;

·   Grout curtain should be provided in front of the building;

·   Recharging system should be installed as a contingency measure to mitigate the fluctuation of water table;

·   the AAA settlement and tilting limit should be 6/8/10 mm and 1/2000, 1/1500 and 1/1000;

·   Monitoring of vibration levels will be undertaken during the construction phase and the Alert, Alarm and Action (AAA) vibration limit will be set at 5/6/7.5 mm/s. The monitoring proposal should be sent to AMO for comment;.

·   Regular site inspections and monitoring works will be carried out by the contractor and the monitoring results will be submitted to the resident site staff of HyD to ensure compliance.

Protect the building from damage from construction works

Contractor

Yau Ma Tei Police Station (Old Wing) (CKR-01)

Prior to commencement of and during the construction phase

·   Guidelines for Cultural Heritage Impact Assessment

·   EIAO-TM Annex 10 and Annex 19

·   AMO Proposed Vibration Limits

·   Implemented

S12.6.1 Table 12.2

·   The Alert, Alarm and Action (AAA) vibration limit will be set at 3/4/5 mm/s and a condition survey shall be carried out by the project proponent prior to the construction phase to confirm this assessment

·   Vibration monitoring of the structure shall be employed during the construction phase to ensure that the level is not exceeded. The monitoring proposal should be sent to AMO for comment.

Protect the building from damage from construction works

Contractor

Tin Hau Temple (CKR-02)

Prior to commencement of and during the construction phase

·   Guidelines for Cultural Heritage Impact Assessment

·   EIAO-TM Annex 10 and Annex 19

·   AMO Proposed Vibration Limits

·   Implemented

EM&A Project

S13.2

EM1

An Independent Environmental Checker needs to be employed as per the EM&A Manual

Control EM&A Performance

Highways Department

All construction sites

Construction stage

·   EIAO Guidance Note No. 4/2010

·   TM-EIAO

·   Implemented

S13.2-13.4

EM2

·   An Environmental Team needs to be employed as per the EM&A Manual;

·   Prepare a systematic Environmental Management Plan to ensure effective implementation of the mitigation measures;

·   An environmental impact monitoring needs to be implemented by the Environmental Team to ensure all the requirements given in the EM&A Manual are fully complied with.

Perform environmental monitoring & auditing

Highways Department/ Contractor

All construction sites

Construction stage

·   EIAO Guidance Note No. 4/2010

·   TM-EIAO

·   Implemented

Location:

Yau Ma Tei Catholic Primary School (Hoi Wang Road) (W-A1)

Monitoring date:

5, 8, 14, 19 and 25 February 2022

Parameter :

TSP 1-hour

Other Factors

Nearby traffic

Date

1-hour TSP (μg/m³)

Weather

Start Time

1^st Hour

(μg/m³)

2^nd Hour

(μg/m³)

3^rd Hour

(μg/m³)

05/02/2022

Sunny

8:48

63

58

56

08/02/2022

Sunny

9:13

59

65

61

14/02/2022

Sunny

9:19

64

60

69

19/02/2022

Cloudy

12:54

64

69

62

25/02/2022

Sunny

8:56

62

69

66

Minimum: 56 μg/m³

Maximum: 69 μg/m³

Location:

Man Cheong Building (W-A6)

Monitoring date:

5, 8, 14, 19 and 25 February 2022

Parameter :

TSP 1-hour

Other Factors

Nearby traffic

Date

1-hour TSP (μg/m³)

Weather

Start Time

1^st Hour

(μg/m³)

2^nd Hour

(μg/m³)

3^rd Hour

(μg/m³)

05/02/2022

Sunny

9:03

74

65

69

08/02/2022

Sunny

8:29

77

69

67

14/02/2022

Sunny

8:47

70

73

76

19/02/2022

Cloudy

9:44

68

77

76

25/02/2022

Sunny

9:17

78

74

72

Minimum: 65 μg/m³

Maximum: 78 μg/m³

Location:

Yau Ma Tei Catholic Primary School (Hoi Wang Road) (W-A1)

Monitoring date:

5, 8, 14, 19 and 25 February 2022

Parameter :

TSP 24-hour

Other Factors

Nearby traffic

Location:

Man Cheong Building (W-A6)

Monitoring date:

5, 8, 14, 19 and 25 February 2022

Parameter :

TSP 24-hour

Other Factors

Nearby traffic

Location:

Yau Ma Tei Catholic Primary School (Hoi Wang Road) (W-N1A)

Monitoring date:

5, 8, 14, 19 and 25 February 2022

Parameter :

L_eq, L₁₀, L₉₀

Other Factors

Nearby traffic

05/02/2022

Sunny

11:32

-

12:02

59.8

62.3

58.1

3.9

08/02/2022

Sunny

9:19

-

9:49

59.9

62.7

58.3

3.1

14/02/2022

Sunny

9:20

-

9:50

60.3

62.7

58.4

3.3

19/02/2022

Cloudy

12:56

-

13:26

59.8

60.4

59.0

4.2

25/02/2022

Sunny

11:54

-

12:24

60.2

62.9

57.9

1.7

Location:

Hydan Place (W-N18)

Monitoring date:

5, 8, 14, 19 and 25 February 2022

Parameter :

L_eq, L_10,  L₉₀

Other Factors

Nearby traffic

05/02/2022

Sunny

10:02

-

10:32

69.9

73.9

68.2

3.3

08/02/2022

Sunny

11:26

-

11:56

70.2

74.3

68.3

2.5

14/02/2022

Sunny

10:41

-

11:11

68.9

74.0

67.0

1.9

19/02/2022

Cloudy

10:06

-

10:36

70.2

72.1

67.3

3.1

25/02/2022

Sunny

10:16

-

10:46

70.1

74.3

67.8

0.8

Location:

Prosperous Garden Block 1 (W-N25A)

Monitoring date:

5, 8, 14, 19 and 25 February 2022

Parameter :

L_eq, L_10,  L₉₀

Other Factors

Nearby traffic

05/02/2022

Sunny

9:19

-

9:49

71.0

75.2

67.6

2.2

08/02/2022

Sunny

10:42

-

11:12

70.1

73.8

67.1

3.1

14/02/2022

Sunny