13                Appendix A13  IMPLEMENTATION SCHEDULE

 

13.1          Introduction

 

13.1.1    The recommended environmental mitigation measures for construction and operation of Siu Ho Wan WTW Extension, which is classified as a designated project under EIAO, are summarized in Tables 13.1 – 13.5.  The proposed environmental mitigation measures for non-designated project including construction & operation of Siu Ho Wan Raw Water Booster Pumping Station, demolition & reprovisioning of the Pui O Raw Water Pumping Station, uprating of the Pui O No. 2 Raw Water Pumping Station and laying of two sections of 1200 mm diameter raw water mains at Pui O are summarized in Tables 13.6 – 13.12, and these mitigation measures would be administratively implemented and would not be under the control of the Environmental Permit. 


Table ATable 13.1       Implementation Schedule for Air Quality Control (Designated Project)

 

EIA

Ref#

Environmental Protection Measures

Location / Timing

Implementation Agent

Implementation Stages *

Relevant Legislation & Guidelines

D

C

O

Construction Phase

S3.8

Dust mitigation measures stipulated in the Air Pollution Control (Construction Dust) Regulation shallshouldshall be incorporated to control dust emission.  Notice shouldshallshall be given to authority prior to commencing of work.  Relevant control measures include:

·         watering on the work sites at Siu Ho Wan WTW twice a day;

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

·         vehicle washing facilities shall be provided at every vehicle exit point;

·         the area where vehicle washing takes place and the section of the road between the washing facilities and the exit point shall be paved with concrete, bituminous materials or hardcores;

·         every main haul road shall be scaled with concrete and kept clear of dusty materials or sprayed with water so as to maintain the entire road surface wet;

·         every stock of more than 20 bags of cement shall be covered entirely by impervious sheeting placed in an area sheltered on the top and the three sides;

·         all dusty materials shall be sprayed with water prior to any loading, unloading or transfer operation so as to maintain the dusty materials wet;

·         every vehicle shall be washed to remove any dusty materials from its body and wheels before leaving the construction sites;

·         the dusty materials stockpiled on site shall be covered; and

·         the load of dusty materials carried by vehicle leaving a construction site shall be covered entirely by clean impervious sheeting to ensure dust materials do not leak from the vehicle.

Work site / during construction period.

Contractor

 

Ö

 

Air Pollution Control (Construction Dust) Regulation

 

·         the dusty materials stockpiled on site shall be covered; and

·         the load of dusty materials carried by vehicle leaving a construction site shall be covered entirely by clean impervious sheeting to ensure dust materials do not leak from the vehicle.

 

 

 

 

 

 

Operation Phase

N/A

N/A

N/A

N/A

 

 

 

 

#              All recommendations and requirements resulted during the course of EIA / EA Process, including ACE and / or accepted public comment to the proposed project.

*              D = Design, C = Construction and O = Operation

N/A                          Not applicable

 Table A.2 Implementation Schedule for Noise Control

 

EIA

Ref#

Environmental Protection Measures

Location / Timing

Implementation Agent

Implementation Stages *

Relevant Legislation & Guidelines

D

C

O

Construction Phase

S4.8.1

Use of silenced PME

 

Work site close to all NSRs /during raw water mains construction, demolition & construction of Pui O Raw Water Pumping Station.

Contractor

 

Ö

 

NCO, EIAO-TM

S4.8.3

Use of movable noise barriers

Work site close to Bui O Public School and NSRs located less than 25 m from raw water mains site / during raw water mains construction at Pui O

Contractor

 

Ö

 

NCO, EIAO-TM

S4.8.4

·Excavation of Trench / Breaking up Pavement – wheeled excavator/loader fitted with hydraulic breaker would not be operated during examination period;

·Reinstating Road Surface during raw water mains Construction  - Reduction of 50% operated On-time percentage of lorry;

·Installation of Pipes and Bedding – Reduction of number of operated mobile crane. 

Work site close to Bui O Public School / during examination period

Contractor

 

Ö

 

NCO, EIAO-TM

S4.8.6

Good Site Practices:

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

·Mobile plant, if any, should be sited as far away from NSRs as possible.

·Machines and plant (such as trucks) 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 should, wherever possible, be orientated so that the noise is directed away from the nearby NSRs.

 

Work site close to all NSRs / throughout the construction period.

Contractor

 

Ö

 

NCO, EIAO-TM

S4.8.6

·Material stockpiles and other structures should be effectively utilised, wherever practicable, in screening noise from on-site construction activities.

·Silencers or mufflers on construction equipment should be utilised and should be properly maintained during the construction programmeme.

 

Work site close to all NSRs / throughout the construction period.

Contractor

 

Ö

 

NCO, EIAO-TM

Operation Phase

S4.8.7

Silencers for the ventilation fans and acoustic louvres for ventilation openings of pump hall should be provided at reprovisioned Pui O Raw Water Pumping Station, which would providehave a minimum insertion loss of 10 dB(A).

Pui O Raw Water Pumping Station / during operation phase

WSD

 

 

Ö

NCO, EIAO-TM

#    All recommendations and requirements resulted during the course of EIA / EA Process, including ACE and / or accepted public comment to the proposed project.

*     D = Design, C = Construction and O = Operation

N/A   Not applicable  

 

 

Table ATable 13.23       Implementation Schedule for Water Quality Control (Designated Project)

 

EIA Ref #

Environmental Protection Measures / Mitigation Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

 

Construction Phase

S5.7.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Construction Site Runoff and Drainage

·          Before commencing any site formation work, all sewer and drainage connections shouldshallshall be sealed to prevent debris, soil, sand etc. from entering public sewers/drains.

·          Sand/silt removal facilities such as sand traps, silt traps and sediment basins shouldshallshall be provided to remove sand/silt particles from runoff to meet the requirements of the Technical Memorandum standard under the Water Pollution Control Ordinance.  The design of silt removal facilities shouldshallshall be based on the guidelines provided in ProPECC PN 1/94.  All drainage facilities and erosion and sediment control structures shouldshallshall be inspected monthly and maintained to ensure proper and efficient operation at all times and particularly during rainstorms. 

·          Water pumped out from foundation excavations shall shouldshall be discharged into silt removal facilities.

Open trench excavation for the mainlaying works at Pui O near the stream courses shall should be avoided in the wet season as far as practicable (i.e. during April to October), and the trench shall should be excavated and backfilled in short sections.

·          Exposed soil surfaces shall shouldshall be protected by paving or fill material as soon as possible to reduce the potential of soil erosion.

·          Open stockpiles of construction materials or construction wastes on-site of more than 50m3 shall shouldshall be covered with tarpaulin or similar fabric during rainstorms.

Work site / During the construction period

Contractor

 

Ö

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Ö

 

ProPECC PN 1/94; WPCO

 

S5.7.3

 

 

 

 

 

 

 

 

 

 

S5.7.4

General Construction Activities

·        Debris and rubbish generated on-site shall shouldshall be collected, handled and disposed of properly to avoid entering the nearby watercourses and storm water drains.  Stockpiles of cement and other construction materials shall shouldshall be kept covered when not being used.  In particular, care should be exercised during the mainlaying works at Pui O at the locations where the proposed raw water mains would be constructed over the top of the streams.

 

·        Oils and fuels shall shouldshall only be used and stored in designated areas which have pollution prevention facilities.  All fuel tanks and storage areas shall shouldshall be provided with locks and be sited on sealed areas, within bunds of a capacity equal to 110% of the storage capacity of the largest tank.  The bund shall shouldshall be drained of rainwater after a rain event.

 

Work site / During the construction period

Contractor

 

Ö

 

ProPECC PN 1/94; WPCO

S5.7.4

·        Oils and fuels shall only be used and stored in designated areas which have pollution prevention facilities.  All fuel tanks and storage areas shall be provided with locks and be sited on sealed areas, within bunds of a capacity equal to 110% of the storage capacity of the largest tank.  The bund shall be drained of rainwater after a rain event.

 

 

 

Ö

 

 

S5.7.5

Sewage from Construction Workforce

·        Temporary sanitary facilities, such as portable chemical toilets, shall shouldshall be employed on-site.  A licensed contractor shall shouldshall be responsible for appropriate disposal and maintenance of these facilities.

 

Work site / During the construction period

Contractor

 

Ö

 

WPCO

Operation Phase

N/A

N/A

N/A

N/A

 

 

 

 

#              All recommendations and requirements resulted during the course of EIA/EA Process, including ACE and / or accepted public comment to the proposed project.

*              D = Design, C = Construction and O = Operation

N/A          Not applicable

Table ATable 13.34       Implementation Schedule for Ecology (Designated Project)

 

EIA

Ref#

Environmental Protection Measures

Location / Timing

Implementation Agent

Implementation Stages *

Relevant Legislation & Guidelines

D

C

O

Construction Phase

 

S.6.9.3

 

 

 

 

 

 

 

S.6.9.4/ S.6.11.2S.6.9.4.

Mitigation to minimise impacts on vegetation in woodland

·        All trees shouldshall be preserved as far as possible, especially species of high conservation or amenity value. Recommendations to be provided in the Tree Survey Report to mitigate impacts on trees shouldshall be followed.  Where trees are to be preserved in-situ, but are likely to be disturbed from works activities, protective fencing/hoarding shouldshall be carefully set up around the affected trees (refer to Landscape and Visual).

·Disturbance of individuals of the shrub/tree species Pavetta hongkongensis and tree Aquilaria sinensis of conservation interest should be avoided. A buffer to the dripline of each plant of at least 1m radius should be demarcated to prohibit disturbance.  Where loss of this species would be unavoidable, it is recommended that these plants may be transplanted to safe locations within the same habitat. Following transplantation, regular monitoring of the trees and seedlings should be conducted by a suitably qualified botanist/horticulturist over a 12-month period.

 

Disturbance of individuals of the shrub/tree species Pavetta hongkongensis and tree Aquilaria sinensis of conservation interest should be avoided. A buffer to the drip line of each plant of at least 1m radius should be demarcated to prohibit disturbance.  Where loss of this species would be unavoidable, these plants may be transplanted to safe locations within the same habitat.

 

Work site particularly woodland / During design phase and construction period

 

 

 

Work site in woodland / Prior to and during the construction period

WSD/ Contractor

 

 

 

 

 

 

 

 

WSD/ Contractor

Ö

 

 

 

 

 

 

Ö

Ö

 

 

 

 

 

 

Ö

 

EIAO

 

S.6.9.6

Mitigation to minimise general disturbance to wildlife

·        Noise mitigation measures through the use of quiet construction plant shouldshall be implemented to minimise disturbance to habitats adjacent to the works areas.

 

Work site / During construction period

Contractor

 

Ö

 

EIAO

 

S.6.9.7.

General mitigation through  good site practice

·        Placement of  equipment or stockpile in designated works areas and access routes selected on existing disturbed land to minimise disturbance to natural habitats.

·        Construction activities shouldshall be restricted to works areas that shouldshall be clearly demarcated. The works areas shouldshall be reinstated after completion of the works.

·        Waste skips shouldshall be provided to collect general refuse and construction wastes. The wastes shouldshall be disposed of timely and properly off-site.

·        General drainage arrangements shouldshall include sediment and oil traps to collect and control construction site run-off.

·        Open burning on works sites is illegal, and shouldshall be strictly prohibited. Stove fires on works sites shouldshall also not be allowed. Temporary fire fighting equipment shouldshall be provided particularly in woodland areas.

 

Work site / During construction period

Contractor

 

Ö

 

EIAO

S.6.9.8.

Re-vegetation to reinstate works areas

 

·        As far as possible compensatory planting shouldshall use native plants of the same species that occur in the adjacent woodland habitat and have flowers/fruits attractive to wildlife (also refer to Landscape and Visual).  On-site compensatory planting should be conducted on at least a one to one basis.

 

Work site in woodland / Immediately following works

Contractor

 

Ö

Ö

EIAO

Operation Phase

N/A

N/A

N/A

N/A

 

 

 

N/A

#              All recommendations and requirements resulted during the course of EIA / EA Process, including ACE and / or accepted public comment to the proposed project.

*              D = Design, C = Construction and O = Operation

N/A          Not applicable         

 

 

 

 

 

Table ATable 13.45       Implementation Schedule for Landscape and Visual Impact (Designated Project)

 

EIA

Ref#

Environmental Protection Measures

Location / Timing

Implementation Agent

Implementation Stages *

Relevant Legislation & Guidelines

D

C

O

Construction Phase

S7.9

 

 

·         All existing top-soil shouldshall be conserved and reused.

·         Temporary hoarding barriers shouldshall be of a recessive visual appearance in both colour and form.

·         The pumping station should be carefully located to avoid affecting existing urban landscape elements such as mature trees.  Optimal screen planting and setback from public roads and pedestrian footpaths should be allowed.

·         Compatible design and construction materials and surface finishes of the proposed structures shall match with the nearby existing external appearance of WTW buildings in Siu Ho Wan for achieving visual uniformity..The design of the SHW WTW Extension and Pui O Raw Water Pumping Station and associated structures should incorporate materials, details and textures so as to fits with the existing water treatment works buildings.  Subtle chromatic scheme should be introduced as the surface colour of the proposed SHW Raw Water Booster Pumping Station for achieving visual integration with the surrounding landscape.The design of the pumping stations, water treatment works and associated structure should incorporate materials, details and textures so as to be as visually recessive as possible and in style that fits with the existing water treatment works building and surrounding village buildings.  Colour should be of low chromatic intensity to reduce the potential contrast between the structures and their background.

 

During construction phase

Contractor

 

Ö

 

EIAO-TM

Operation Phase

S7.9

Maximum mitigation planting should be allowed to act as a buffer zone or screen between the pumping station and local residents, road users etc. Screen planting will mitigate the visual impacts of the buildings, security fences, wall and associated structures

·         New compensatory planting works shouldshall be carried out as early as possible in the construction period which allow maximum time for establishment and more mature trees when the works completed

·         .

·         Landscape or compensatory planting shall be provided where appropriate for enhancing greening and achieving visual screening. In this aspect, compensatory tree planting shall be considered. Selection of plant species shall match with the surrounding vegetation type and form for consistency of landscape resources and visual comfort, for matching with the local habitat. Tree planting shall be firstly considered when the amenity area or slope is feasible for planting trees so as to provide visual screening.

·          

·         Planting area of approximately 2000 to 3000mm wide where fast growing tall trees with dense foliage shall be provided along the site boundary of SHW WTW for visual screening.

·         For planting close to or surrounded by natural terrain, compensatory planting should be arranged in a semi natural manner where feasible in order to blend the new planting into natural environment.

·          

·          The newly planted trees, shrubs and grassed areas are maintained throughout the first 12 months of the operation stage.

 

During operation phase

Contractor

 

 

Ö

EIAO-TM

#              All recommendations and requirements resulted during the course of EIA / EA Process, including ACE and / or accepted public comment to the proposed project.

*              D = Design, C = Construction and O = Operation;  N/A            Not applicable

N/A  Not applicable 

 

 

 

Table ATable 13.56       Implementation Schedule for Waste Management (Designated Project)

 

EIA Ref #

Environmental Protection Measures

Location/ Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

D

C

O

 

S10.5.1 - S10.5.3

Good Site Practices

Good site practices during the construction activities include:

·         Nomination of approved personnel, such as a site manager, to be responsible for good site practices and making arrangements for collection of all wastes generated at the site and effective disposal to an appropriate facility.

·         Training of site personnel in proper waste management and chemical waste handling procedures.

·         Provision of sufficient waste disposal points and regular collection for disposal.

·         Appropriate measures to minimise windblown litter and dust during transportation of waste by either covering trucks or by transporting wastes in enclosed containers.

·         Regular cleaning and maintenance programme for drainage systems, sumps and oil interceptors.

·         A Waste Management Plan shall be prepared and submitted to the Engineer for approval. One may make reference to ETWB TCW No. 15/2003 for details.

·         A recording system for the amount of wastes generated, recycled and disposed (including the disposal sites) shouldshall be proposed.

·         In order to monitor the disposal of C&D material at public filling areas and to control fly tipping, a trip-ticket system shall be included as one of the contractual requirements to be implemented by an Environmental Team undertaking the Environmental Monitoring and Audit work.  One may make reference to WBTC No. 21/2002 for details.

 

Work site / During the construction period

Contractor

 

Ö

 

Waste Disposal Ordinance (Cap.54)

WBTC No.21/2002, ETWB TCW No. 15/2003

S10.5.4

Waste Reduction Measures

Waste reduction is best achieved at the planning and design stage, as well as by ensuring the implementation of good site practices. Recommendations to achieve waste reduction include:

·         Segregation and storage of different types of waste in different containers, skips or stockpiles to enhance reuse or recycling of materials and their proper disposal.

·         Separate labelled bins shouldshall be provided to segregate aluminium cans from other general refuse generated by the work force, and to encourage collection of by individual collectors.

·         Any unused chemicals or those with remaining functional capacity shouldshall be recycled.

·         Maximising the use of reusable steel formwork to reduce the amount of C&D material.

·         Proper storage and site practices to minimise the potential for damage or contamination of construction materials.

·         Plan and stock construction materials carefully to minimise amount of waste generated and avoid unnecessary generation of waste.

 

Work site / During planning & design stage, and construction stage

WSD/Contractor

Ö

Ö

 

WBTC No.4/98, ETWB TCW No. 15/2003

S10.5.95

General Refuse

General refuse shouldshall be stored in enclosed bins or compaction units separate from C&D material.  A reputable waste collector shouldshall be employed by the contractor to remove general refuse from the site, separately from C&D material. 

Work site / During the construction period

Contractor

 

Ö

 

Public Health and Municipal Services Ordinance (Cap. 132)

S10.5.6 – S10.5.7

Construction & Demolition (C&D) Material

Excavated soft spoil from open trench excavation at Pui O should be reused on-site as backfill material as far as practicable.  Suitable areas should be designated within the works site boundaries for temporary stockpiling of C&D material.  Within stockpile areas, the following measures should be taken to control potential environmental impacts or nuisance:

 

·covering material during heavy rainfall;

·locating stockpiles to minimse potential visual impacts; and

·minimizing land intake of stockpile areas as far as possible.

 

When disposing C&D material at a public filling area, it shouldshall be noted that the material shouldshall only consist of soil, rock, concrete, brick, cement plaster/mortar, inert building debris, aggregates and asphalt.  The material shouldshall be free from marine mud, household refuse, plastic, metals, industrial and chemical waste, animal and vegetable matter, and other material considered to be unsuitable by the Filling Supervisor. 

 

Work site / During the construction period

Contractor

 

Ö

 

WBTC No. 4/98, 21/2002, 25/99, 12/2000

ETWB TCW No. 15/2003

S10.5.8

Chemical Wastes

If chemical wastes are produced at the construction site, the Contractor would be required to register with the EPD as a Chemical Waste Producer and to follow the guidelines stated in the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.   Good quality containers compatible with the chemical wastes shouldshall be used.  Appropriate labels shouldshall be securely attached on each chemical waste container indicating the corresponding chemical characteristics of the chemical waste, such as explosives, flammable, oxidizing, irritant, toxic, harmful, corrosive, etc.  The Contractor shouldshall use a licensed collector to transport and dispose of the chemical wastes generated at the Chemical Waste Treatment Centre at Tsing Yi, or other licenced facility, in accordance with the Waste Disposal (Chemical Waste) (General) Regulation. No chemical waste shouldshall be allowed to be stored within the site of the waterworks installations of the including the Siu Ho Wan WTW, Pui O Raw Water Pumping Station and Pui O No.2 Raw Water Pumping Station.  All chemical wastes shouldshall be removed from the waterworks installations at the first instance.

Work site / During the construction period

Contractor

 

Ö

 

 

# All recommendations and requirements resulted during the course of EIA Process, including ACE and / or accepted public comment to the proposed project.

D - Design, C - Construction, O - Operation

 

Table A.76                                                                                                                                                                                                                                                      Implementation Schedule for Cultural Heritage Impact

 

EIA

Ref#

Environmental Protection Measures

Location / Timing

Implementation Agent

Implementation Stages *

Relevant Legislation & Guidelines

D

C

O

Construction Phase

 

 

 

S8.9.2

Mitigation measures for minimising impacts on Cultural Heritage resources

 

·mitigation measures in the form of a temporary fenced off buffer zone with allowance for public access (minimum 1 m) should be provided around the shrine SHW-01 at Pui O Lo Wai Tsuen.  In case of site constraint, the existing perimeter fence at Pui O Raw Water Pumping Station could be incorporated to protect the shrine and should form the limit of the buffer zone.

Perimeter of Heritage resourceslsnient distance of the proposed works, except for the s and Monuments Ordinance (Cap. st tion optwork site / During the construction period

Contractor

 

Ö

 

EIAO-TM

Operation Phase

N/A

N/A

N/A

N/A

 

 

 

N/A

#                                                                                                                                                                                                                                                                                                                                         All recommendations and requirements resulted during the course of EIA / EA Process, including ACE and / or accepted public comment to the proposed project.

*                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                D = Design, C = Construction and O = Operation

N/A                                                                                                                                                                                                                                                                                                                                        Not applicable                                                                                                                                                                                                                                                                                                                                       


 Table A.7                                                                                                                                                                                                                                                      Implementation Schedule for Waste Management

 

EIA Ref #

Environmental Protection Measures/Mitigation Measures

Location/ Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

Des

C

O

 

S10.5.1 - S10.5.3

Good Site Practices

Good site practices during the construction activities include:

Nomination of approved personnel, such as a site manager, to be responsible for good site practices and making arrangements for collection of all wastes generated at the site and effective disposal to an appropriate facility.

Training of site personnel in proper waste management and chemical waste handling procedures.

Provision of sufficient waste disposal points and regular collection for disposal.

Appropriate measures to minimise windblown litter and dust during transportation of waste by either covering trucks or by transporting wastes in enclosed containers.

Regular cleaning and maintenance programme for drainage systems, sumps and oil interceptors.

A Waste Management Plan shall be prepared and submitted to the Engineer for approval. One may make reference to ETWB TCW No. 15/2003 for details.

A recording system for the amount of wastes generated, recycled and disposed (including the disposal sites) should be proposed.

In order to monitor the disposal of C&D material at public filling areas and to control fly tipping, a trip-ticket system shall be included as one of the contractual requirements to be implemented by an Environmental Team undertaking the Environmental Monitoring and Audit work.  One may make reference to WBTC No. 21/2002 for details.

 

Work site / During the construction period

Contractor

 

Ö

 

Waste Disposal Ordinance (Cap.54)

WBTC No.21/2002, ETWB TCW No. 15/2003

S10.5.4

Waste Reduction Measures

Waste reduction is best achieved at the planning and design stage, as well as by ensuring the implementation of good site practices. Recommendations to achieve waste reduction include:

Segregation and storage of different types of waste in different containers, skips or stockpiles to enhance reuse or recycling of materials and their proper disposal.

Separate labelled bins shall be provided to segregate aluminium cans from other general refuse generated by the work force, and to encourage collection of by individual collectors.

Any unused chemicals or those with remaining functional capacity shall be recycled.

Maximising the use of reusable steel formwork to reduce the amount of C&D material.

Proper storage and site practices to minimise the potential for damage or contamination of construction materials.

Plan and stock construction materials carefully to minimise amount of waste generated and avoid unnecessary generation of waste.

 

Work site / During planning & design stage, and construction stage

Contractor

Ö

Ö

 

WBTC No.4/98, ETWB TCW No. 15/2003

S10.5.9

General Refuse

General refuse shall be stored in enclosed bins or compaction units separate from C&D material.  A reputable waste collector shall be employed by the contractor to remove general refuse from the site, separately from C&D material. 

Work site / During the construction period

Contractor

 

Ö

 

Public Health and Municipal Services Ordinance (Cap. 132)

S10.5.6 – S10.5.7

Construction & Demolition (C&D) Material

Excavated soft spoil from open trench excavation at Pui O should be reused on-site as backfill material as far as practicable.  Suitable areas should be designated within the works site boundaries for temporary stockpiling of C&D material.  Within stockpile areas, the following measures shall be taken to control potential environmental impacts or nuisance:

 

covering material during heavy rainfall;

locating stockpiles to minimse potential visual impacts; and

minimizing land intake of stockpile areas as far as possible.

 

When disposing C&D material at a public filling area, it shall be noted that the material shall only consist of soil, rock, concrete, brick, cement plaster/mortar, inert building debris, aggregates and asphalt.  The material shall be free from marine mud, household refuse, plastic, metals, industrial and chemical waste, animal and vegetable matter, and other material considered to be unsuitable by the Filling Supervisor. 

 

Work site / During the construction period

Contractor

 

Ö

 

WBTC No. 4/98, 21/2002, 25/99, 12/2000

ETWB TCW No. 15/2003

S10.5.8

Chemical Wastes

If chemical wastes are produced at the construction site, the Contractor would be required to register with the EPD as a Chemical Waste Producer and to follow the guidelines stated in the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.   Good quality containers compatible with the chemical wastes should be used.  Appropriate labels should be securely attached on each chemical waste container indicating the corresponding chemical characteristics of the chemical waste, such as explosives, flammable, oxidizing, irritant, toxic, harmful, corrosive, etc.  The Contractor shall use a licensed collector to transport and dispose of the chemical wastes generated at the Chemical Waste Treatment Centre at Tsing Yi, or other licenced facility, in accordance with the Waste Disposal (Chemical Waste) (General) Regulation. No chemical waste shall be allowed to be stored within the site of the waterworks installations including the Siu Ho Wan WTW and the Pui O Pumping Stations.  All chemical wastes shall be removed from the waterworks installations at the first instance.

Work site / During the construction period

Contractor

 

Ö

 

 

Table 13.6       Implementation Schedule for Air Quality Control (Non-Designated Project)

 

EIA

Ref#

Environmental Protection Measures

Location / Timing

Implementation Agent

Implementation Stages *

Relevant Legislation & Guidelines

D

C

O

Construction Phase

S3.8

Dust mitigation measures stipulated in the Air Pollution Control (Construction Dust) Regulation shall be incorporated to control dust emission.  Notice shall be given to authority prior to commencing of work.  Relevant control measures include:

·         watering on the work sites at Siu Ho Wan WTW twice a day;

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

·         vehicle washing facilities shall be provided at every vehicle exit point;

·         the area where vehicle washing takes place and the section of the road between the washing facilities and the exit point shall be paved with concrete, bituminous materials or hardcores;

·         every main haul road shall be scaled with concrete and kept clear of dusty materials or sprayed with water so as to maintain the entire road surface wet;

·         every stock of more than 20 bags of cement shall be covered entirely by impervious sheeting placed in an area sheltered on the top and the three sides;

·         all dusty materials shall be sprayed with water prior to any loading, unloading or transfer operation so as to maintain the dusty materials wet;

·         every vehicle shall be washed to remove any dusty materials from its body and wheels before leaving the construction sites;

Work site / during construction period.

Contractor

 

Ö

 

Air Pollution Control (Construction Dust) Regulation

 

·         the dusty materials stockpiled on site shall be covered; and

·         the load of dusty materials carried by vehicle leaving a construction site shall be covered entirely by clean impervious sheeting to ensure dust materials do not leak from the vehicle.

 

 

 

 

 

 

Operation Phase

N/A

N/A

N/A

N/A

 

 

 

 

 

# All recommendations and requirements resulted during the course of EIA Process, including ACE and / or accepted public comment to the proposed project.

Des - Design, C - Construction, O - Operation and Dec – Decommissioning

 

#              All recommendations and requirements resulted during the course of EIA / EA Process, including ACE and / or accepted public comment to the proposed project.

*              D = Design, C = Construction and O = Operation

N/A          Not applicable
Table 13.7       Implementation Schedule for Noise Control (Non-Designated Project)

 

EIA

Ref#

Environmental Protection Measures

Location / Timing

Implementation Agent

Implementation Stages *

Relevant Legislation & Guidelines

 

D

C

O

 

Construction Phase

S4.8.1

Use of silenced PME

 

Work site close to all NSRs /during raw water mains construction, demolition & construction of Pui O Raw Water Pumping Station.

Contractor

 

Ö

 

NCO, EIAO-TM

 

S4.8.3

Use of movable noise barriers

Work site close to Bui O Public School and NSRs located less than 25 m from raw water mains site / during raw water mains construction at Pui O

Contractor

 

Ö

 

NCO, EIAO-TM

 

S4.8.6

Good Site Practices:

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

·         Mobile plant, if any, should be sited as far away from NSRs as possible.

·         Machines and plant (such as trucks) 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 should, wherever possible, be orientated so that the noise is directed away from the nearby NSRs.

 

Work site close to all NSRs / throughout the construction period.

Contractor

 

Ö

 

NCO, EIAO-TM

 

S4.8.6

·         Material stockpiles and other structures should be effectively utilised, wherever practicable, in screening noise from on-site construction activities.

·         Silencers or mufflers on construction equipment should be utilised and should be properly maintained during the construction programme.

 

Work site close to all NSRs / throughout the construction period.

Contractor

 

Ö

 

NCO, EIAO-TM

 

Operation Phase

S4.8.7

Silencers for the ventilation fans and acoustic louvres for ventilation openings of pump hall should be provided at reprovisioned Pui O Raw Water Pumping Station, which have a minimum insertion loss of 10 dB(A).

Pui O Raw Water Pumping Station / during operation phase

WSD

 

 

Ö

NCO, EIAO-TM

#              All recommendations and requirements resulted during the course of EIA / EA Process, including ACE and / or accepted public comment to the proposed Project.

*              D = Design, C = Construction and O = Operation

N/A          Not applicable         

 

Table 13.8       Implementation Schedule for Water Quality Control (Non-Designated Project)

 

EIA Ref #

Environmental Protection Measures

Location / Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

D

C

O

 

Construction Phase

S5.7.2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Construction Site Runoff and Drainage

·          Before commencing any site formation work, all sewer and drainage connections shall be sealed to prevent debris, soil, sand etc. from entering public sewers/drains.

·          Sand/silt removal facilities such as sand traps, silt traps and sediment basins shall be provided to remove sand/silt particles from runoff to meet the requirements of the Technical Memorandum standard under the Water Pollution Control Ordinance.  The design of silt removal facilities shall be based on the guidelines provided in ProPECC PN 1/94.  All drainage facilities and erosion and sediment control structures shall be inspected monthly and maintained to ensure proper and efficient operation at all times and particularly during rainstorms. 

·          Water pumped out from foundation excavations shall be discharged into silt removal facilities.

·          Open trench excavation for the mainlaying works at Pui O near the stream course should be avoided in the wet season as far as practicable (i.e. during April to October), and the trench shall be excavated and backfilled in short sections.

 

·          Exposed soil surfaces shall be protected by paving or fill material as soon as possible to reduce the potential of soil erosion.

·          Open stockpiles of construction materials or construction wastes on-site of more than 50m3 shall be covered with tarpaulin or similar fabric during rainstorms.

Work site / During the construction period

Contractor

 

Ö

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ProPECC PN 1/94; WPCO

 

S5.7.3

 

 

 

 

 

 

General Construction Activities

·        Debris and rubbish generated on-site shall be collected, handled and disposed of properly to avoid entering the nearby watercourses and storm water drains.  Stockpiles of cement and other construction materials shall be kept covered when not being used.  In particular, care should be exercised during the mainlaying works at Pui O at the locations where the proposed raw water mains would be constructed over the top of the streams.

 

Work site / During the construction period

Contractor

 

Ö

 

ProPECC PN 1/94; WPCO

S5.7.4

·        Oils and fuels shall only be used and stored in designated areas which have pollution prevention facilities.  All fuel tanks and storage areas shall be provided with locks and be sited on sealed areas, within bunds of a capacity equal to 110% of the storage capacity of the largest tank.  The bund shall be drained of rainwater after a rain event.

 

 

 

Ö

 

 

S5.7.5

Sewage from Construction Workforce

·        Temporary sanitary facilities, such as portable chemical toilets, shall be employed on-site.  A licensed contractor shall be responsible for appropriate disposal and maintenance of these facilities.

 

Work site / During the construction period

Contractor

 

Ö

 

WPCO

Operation Phase

N/A

N/A

N/A

N/A

 

 

 

 

#              All recommendations and requirements resulted during the course of EIA/EA Process, including ACE and / or accepted public comment to the proposed project.

*              D = Design, C = Construction and O = Operation

N/A          Not applicable
Table 13.9       Implementation Schedule for Ecology (Non-Designated Project)

 

EIA

Ref#

Environmental Protection Measures

Location / Timing

Implementation Agent

Implementation Stages *

Relevant Legislation & Guidelines

D

C

O

Construction Phase

 

S.6.9.3

 

 

 

 

 

 

S.6.9.4/ S.6.11.2

Mitigation to minimise impacts on vegetation in woodland

·        All trees shall be preserved as far as possible, especially species of high conservation or amenity value. Recommendations to be provided in the Tree Survey Report to mitigate impacts on trees shall be followed.  Where trees are to be preserved in-situ, but are likely to be disturbed from works activities, protective fencing/hoarding shall be carefully set up around the affected trees (refer to Landscape and Visual).

·        Disturbance of individuals of the shrub/tree species Pavetta hongkongensis and tree Aquilaria sinensis of conservation interest should be avoided. A buffer to the dripline of each plant of at least 1m radius should be demarcated to prohibit disturbance.  Where loss of this species would be unavoidable, it is recommended that these plants may be transplanted to safe locations within the same habitat. Following transplantation, regular monitoring of the trees and seedlings should be conducted by a suitably qualified botanist/horticulturist over a 12-month period.

 

 

Work site particularly woodland / During design phase and construction period

 

 

 

 

WSD/ Contractor

 

 

 

 

 

 

 

 

 

Ö

 

 

 

 

 

 

 

Ö

 

 

 

 

 

 

 

 

EIAO

S.6.9.5

Mitigation to minimise impacts on aquatic ecology

·        Trench excavation works for the raw water mains near the stream courses should be carried out in the dry season as far as practicable.

 

 

Work site / During construction period

WSD/ Contractor

 

Ö

Ö

 

 

 

S.6.9.6

Mitigation to minimise general disturbance to wildlife

·        Noise mitigation measures through the use of quiet construction plant shall be implemented to minimise disturbance to habitats adjacent to the works areas.

 

Work site / During construction period

Contractor

 

Ö

 

EIAO

 

S.6.9.7.

General good site practice

·        Placement of equipment or stockpile in designated works areas and access routes selected on existing disturbed land to minimise disturbance to natural habitats.

·        Construction activities shall be restricted to works areas that shall be clearly demarcated. The works areas shall be reinstated after completion of the works.

·        Waste skips shall be provided to collect general refuse and construction wastes. The wastes shall be disposed of timely and properly off-site.

·        General drainage arrangements shall include sediment and oil traps to collect and control construction site run-off.

·        Open burning on works sites is illegal, and shall be strictly prohibited. Stove fires on works sites shall also not be allowed. Temporary fire fighting equipment shall be provided particularly in woodland areas.

 

Work site / During construction period

Contractor

 

Ö

 

EIAO

S.6.9.8.

Re-vegetation to reinstate works areas

 

·        As far as possible compensatory planting shall use native plants of the same species that occur in the adjacent woodland habitat and have flowers/fruits attractive to wildlife.  On-site compensatory planting should be conducted on at least a one to one basis.

 

Work site in woodland / Immediately following works

Contractor

 

Ö

 

EIAO

Operation Phase

N/A

N/A

N/A

N/A

 

 

 

N/A

#              All recommendations and requirements resulted during the course of EIA / EA Process, including ACE and / or accepted public comment to the proposed project.

*              D = Design, C = Construction and O = Operation

N/A          Not applicable         


Table 13.10     Implementation Schedule for Landscape and Visual Impact (Non-Designated Project)

 

EIA

Ref#

Environmental Protection Measures

Location / Timing

Implementation Agent

Implementation Stages *

Relevant Legislation & Guidelines

D

C

O

Construction Phase

S7.9

 

 

·         All existing top-soil shall be conserved and reused

·         Temporary hoarding barriers shall be of a recessive visual appearance in both colour and form.

·         Compatible design and construction materials and surface finishes of the proposed Pui O Raw Water Pumping Stationstructures shall match with the nearby existing external appearance of WTW buildings in Siu Ho WanPui O No. 2 Raw Water Pumping Station for achieving visual uniformity..

·          

·         Chromatic colour scheme with appropriate texture should be considered while designing the external surface of the proposed SHW Raw Water Booster Pumping Station in order to visually merge the proposed structures into the surrounding landscape.

 

During construction phase

Contractor

 

Ö

 

EIAO-TM

Operation Phase

S7.9

·         New compensatory planting works shall be carried out as early as possible in the construction period which allow maximum time for establishment and more mature trees when the works completed.

·         Landscape or compensatory planting shall be provided where appropriate for enhancing greening and achieving visual screening. In this aspect, compensatory tree planting shall be considered. Selection of plant species shall match with the surrounding vegetation type and form for consistency of landscape resources and visual comfort, for matching with the local habitat. Tree planting shall be firstly considered when the amenity area or slope is feasible for planting trees so as to provide visual screening.

 

 

 

 

 

 

 

S7.9

·         Planting area of approximately 2000 to 3000mm wide where fast growing tall trees with dense foliage shall be provided along the site boundary of  Siu Ho Wan Raw Water Booster Pumping Station for visual screening.

·          

·         .

·          

·         .

·         For planting close to or surrounded by natural terrain, compensatory planting should be arranged in a semi natural manner where feasible in order to blend the new planting into natural environment.

·          

·         The newly planted trees, shrubs and grassed areas are maintained throughout the first 12 months of the operation stage..

 

During operation phase

Contractor

 

 

Ö

EIAO-TM

#              All recommendations and requirements resulted during the course of EIA / EA Process, including ACE and / or accepted public comment to the proposed project.

*              D = Design, C = Construction and O = Operation

N/A          Not applicable         

 

Table 13.11     Implementation Schedule for Cultural Heritage Impact (Non-Designated Project)

 

EIA

Ref#

Environmental Protection Measures

Location / Timing

Implementation Agent

Implementation Stages *

Relevant Legislation & Guidelines

D

C

O

Construction Phase

 

 

 

S8.9.2

Mitigation measures for minimising impacts on Cultural Heritage resources

 

·         mitigation measures in the form of a temporary fenced off buffer zone in proximity to the shrine SHW-01 at Pui O Lo Wai Tsuen with allowance for public access should be provided.  In case of site constraint, the existing perimeter fence at Pui O Raw Water Pumping Station could be incorporated to protect the shrine and should form the limit of the buffer zone.

Perimeter of Heritage resourceslsnient distance of the proposed works, except for the s and Monuments Ordinance (Cap. st tion optwork site / During the construction period

Contractor

 

Ö

 

EIAO-TM

Operation Phase

N/A

N/A

N/A

N/A

 

 

 

N/A

#              All recommendations and requirements resulted during the course of EIA / EA Process, including ACE and / or accepted public comment to the proposed Project.

*              D = Design, C = Construction and O = Operation

N/A          Not applicable      


Table 13.12     Implementation Schedule for Waste Management (Non-Designated Project)

 

EIA Ref #

Environmental Protection Measures

Location/ Timing

Implementation Agent

Implementation Stages*

Relevant Legislation and Guidelines

D

C

O

 

S10.5.1 - S10.5.3

Good Site Practices

Good site practices during the construction activities include:

·         Nomination of approved personnel, such as a site manager, to be responsible for good site practices and making arrangements for collection of all wastes generated at the site and effective disposal to an appropriate facility.

·         Training of site personnel in proper waste management and chemical waste handling procedures.

·         Provision of sufficient waste disposal points and regular collection for disposal.

·         Appropriate measures to minimise windblown litter and dust during transportation of waste by either covering trucks or by transporting wastes in enclosed containers.

·         Regular cleaning and maintenance programme for drainage systems, sumps and oil interceptors.

·         A Waste Management Plan shall be prepared and submitted to the Engineer for approval. One may make reference to ETWB TCW No. 15/2003 for details.

·         A recording system for the amount of wastes generated, recycled and disposed (including the disposal sites) shall be proposed.

·         In order to monitor the disposal of C&D material at public filling areas and to control fly tipping, a trip-ticket system shall be included as one of the contractual requirements to be implemented by an Environmental Team undertaking the Environmental Monitoring and Audit work.  One may make reference to WBTC No. 21/2002 for details.

 

Work site / During the construction period

Contractor

 

Ö

 

Waste Disposal Ordinance (Cap.54)

WBTC No.21/2002, ETWB TCW No. 15/2003

S10.5.4

Waste Reduction Measures

Waste reduction is best achieved at the planning and design stage, as well as by ensuring the implementation of good site practices. Recommendations to achieve waste reduction include:

·         Segregation and storage of different types of waste in different containers, skips or stockpiles to enhance reuse or recycling of materials and their proper disposal.

·         Separate labelled bins shall be provided to segregate aluminium cans from other general refuse generated by the work force, and to encourage collection of by individual collectors.

·         Any unused chemicals or those with remaining functional capacity shall be recycled.

·         Maximising the use of reusable steel formwork to reduce the amount of C&D material.

·         Proper storage and site practices to minimise the potential for damage or contamination of construction materials.

·         Plan and stock construction materials carefully to minimise amount of waste generated and avoid unnecessary generation of waste.

 

Work site / During planning & design stage, and construction stage

WSD/Contractor

Ö

Ö

 

WBTC No.4/98, ETWB TCW No. 15/2003

S10.5.9

General Refuse

General refuse shall be stored in enclosed bins or compaction units separate from C&D material.  A reputable waste collector shall be employed by the contractor to remove general refuse from the site, separately from C&D material. 

Work site / During the construction period

Contractor

 

Ö

 

Public Health and Municipal Services Ordinance (Cap. 132)

S10.5.7

Construction & Demolition (C&D) Material

When disposing C&D material at a public filling area, it shall be noted that the material shall only consist of soil, rock, concrete, brick, cement plaster/mortar, inert building debris, aggregates and asphalt.  The material shall be free from marine mud, household refuse, plastic, metals, industrial and chemical waste, animal and vegetable matter, and other material considered to be unsuitable by the Filling Supervisor. 

 

Work site / During the construction period

Contractor

 

Ö

 

WBTC No. 4/98, 21/2002, 25/99, 12/2000

ETWB TCW No. 15/2003

S10.5.8

Chemical Wastes

If chemical wastes are produced at the construction site, the Contractor would be required to register with the EPD as a Chemical Waste Producer and to follow the guidelines stated in the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.   Good quality containers compatible with the chemical wastes shall be used.  Appropriate labels shall be securely attached on each chemical waste container indicating the corresponding chemical characteristics of the chemical waste, such as explosives, flammable, oxidizing, irritant, toxic, harmful, corrosive, etc.  The Contractor shall use a licensed collector to transport and dispose of the chemical wastes generated at the Chemical Waste Treatment Centre at Tsing Yi, or other licenced facility, in accordance with the Waste Disposal (Chemical Waste) (General) Regulation. No chemical waste shall be allowed to be stored within the site of the waterworks installations of the Pui O Raw Water Pumping Station and Pui O No. 2 Raw Water Pumping Station.  All chemical wastes shall be removed from the waterworks installations at the first instance.

Work site / During the construction period

Contractor

 

Ö

 

 

# All recommendations and requirements resulted during the course of EIA Process, including ACE and / or accepted public comment to the proposed project.

D - Design, C - Construction, O - Operation