Appendix C    IMPLEMENTATION SCHEDULE of ENVIRONMENTAL MITIGATION MEASURES (EMIS)

EIA Ref.

Recommended Mitigation Measures

Location of the measure

Implementation Status

A

Air Quality

 

 

3.74

Skip hoist for material transport should be totally enclosed by impervious sheeting.

All construction sites

 

V

Vehicle washing facilities should be provided at every vehicle exit point.

V

The area where vehicle washing takes place and the section of the road between the washing facilities and the exit point should be paved with concrete, bituminous materials or hardcore.

V

Where a site boundary adjoins a road, streets or other areas accessible to the public, hoarding of not less than 2.4 m high from ground level should be provided along the entire length except for a site entrance or exit.

N/A

Use of regular watering, with complete coverage, to reduce dust emissions from exposed site surfaces and unpaved roads, particularly during dry weather.

V

Side enclosure and covering of any aggregate or dusty material storage piles to reduce emissions.  Where this is not practicable owing to frequent usage, watering shall be applied to aggregate fines.

@

Open stockpiles shall be avoided or covered.  Where possible, prevent placing dusty material storage piles near ASRs

@

Tarpaulin covering of all dusty vehicle loads transported to, from and between site locations.

V

Imposition of speed controls for vehicles on unpaved site roads.  Ten kilometers per hour is the recommended limit.

V

Every stock of more than 20 bags of cement should be covered entirely by impervious sheeting placed in an area sheltered on the top and the 3 sides.

N/A

Every vehicle should be washed to remove any dusty materials from its body and wheels before leaving the construction sites.

V

3.74

Instigation of an environmental monitoring and auditing program to monitor the construction process in order to enforce controls and modify method of work if dusty conditions arise.

All construction sites

V

B

Airborne Noise

 

 

4.56V 4.61

Use of quiet PME, movable barriers and acoustic mats.

All construction sites

 

V

4.67

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

V

Silencers or mufflers on construction equipment shall be utilized and shall be properly maintained during the construction program.

V

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

V

Machines and plant (such as trucks) that may be in intermittent use shall be shut down between works periods or shall be throttled down to a minimum.

V

4.67

Plant known to emit noise strongly in one direction shall, wherever possible, be orientated so that the noise is directed away from the nearby NSRs.

V

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

V

C

Water Quality

 

 

6.349 to  6.375

Construction Site Runoff and General Construction Activities

The mitigation measures as outlined in the ProPECC PN 1/94 Construction Site Drainage should be adopted where applicable.

All construction sites

All construction sites

 

@

6.376

Effluent Discharge

There is a need to apply to EPD for a discharge licence for discharge of effluent from the construction site under the WPCO. The discharge quality must meet the requirements specified in the discharge licence. If monitoring of the treated effluent quality from the works areas is required during the construction phase of the Project, the monitoring should be carried out in accordance with the WPCO license which is under the ambit of regional office (RO) of EPD.

 

Minimum distances of 100 m should be maintained between the discharge points of construction site effluent and the existing saltwater intakes.

V

6.377

Accidental Spillage of Chemicals

 

Contractor must register as a chemical waste producer if chemical wastes would be produced from the construction activities. The Waste Disposal Ordinance (Cap 354) and its subsidiary regulations in particular the Waste Disposal (Chemical Waste) (General) Regulation should be observed and complied with for control of chemical wastes.

@

6.378

Any service shop and maintenance facilities should be located on hard standings within a bunded area, and sumps and oil interceptors should be provided. Maintenance of vehicles and equipment involving activities with potential for leakage and spillage should only be undertaken within the areas appropriately equipped to control these discharges.

N/A

6.379

Disposal of chemical wastes should be carried out in compliance with the Waste Disposal Ordinance. The Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes published under the Waste Disposal Ordinance details the requirements to deal with chemical wastes. General requirements are given as follows:

P     Suitable containers should be used to hold the chemical wastes to avoid leakage or spillage during storage, handling and transport.

 

P     Chemical waste containers should be suitably labelled, to notify and warn the personnel who are handling the wastes, to avoid accidents.

 

P     Storage area should be selected at a safe location on site and adequate space should be allocated to the storage area.

 

@

6.380

Construction Works in Close Proximity of Storm Drains or Seafront

To minimize the potential water quality impacts from the construction works located at or near any watercourse, the practices outlined below should be adopted where applicable.

 

P     The use of less or smaller construction plants may be specified to reduce the disturbance to the storm water courses or marine environment.

 

P     Temporary storage of materials (e.g. equipment, filling materials, chemicals and fuel) and temporary stockpile of construction materials should be located well away from any water courses during carrying out of the construction works.

 

P     Stockpiling of construction materials and dusty materials should be covered and located away from any water courses.

 

P     Construction debris and spoil should be covered up and/or disposed of as soon as possible to avoid being washed into the nearby water receivers.

 

P     Construction activities, which generate large amount of wastewater, should be carried out in a distance away from the waterfront, where practicable.

 

P     Proper shoring may need to be erected in order to prevent soil/mud from slipping into the storm culvert or sea.

All construction sites

 

@

D

Waste Management

 

 

9.107

Reusable steel or concrete panel shutters, fencing and hoarding and signboard should be used as a preferred alternative to items made of wood, to minimise wastage of wood. Attention should be paid to WBTC No. 19/2001 - Metallic Site Hoardings and Signboards to reduce the amount of timber used on construction sites. Metallic alternatives to timber are readily available and should be used rather than new timber. Precast concrete units should be adopted wherever feasible to minimize the use of timber formwork.

All construction sites

 

V

9.109

All waste materials should be segregated into categories covering:

Ÿ   excavated materials suitable for reuse on-site;

Ÿ   excavated materials suitable for public filling facilities;

Ÿ   rEM&Aining C&D waste for landfill;

Ÿ   chemical waste; and

Ÿ   general refuse for landfill.

All construction sites

 

V

9.113

Sort C&D waste from demolition of existing facilities to recover recyclable portions such as metals;

N/A

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.

V

Encourage collection of aluminium cans, PET bottles and paper by providing separate labelled bins to enable these wastes to be segregated from other general refuse generated by the work force.

V

Any unused chemicals or those with rEM&Aining functional capacity shall be recycled.

V

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

@

9.115

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

V

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

V

9.115

Develop and provide toolbox talk for on-site sorting of C&D materials to enhance workers awareness in handling, sorting, reuse and recycling of C&D materials.

V

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

@

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

V

9.125

Bentonite slurries used in diaphragm wall construction should be reconditioned and reused wherever practicable.  The disposal of residual used bentonite slurry should follow the good practice guidelines stated in ProPECC PN 1/94 Construction Site Drainage

All construction sites

 

V

9.131

Adequate number of portable toilets at temporary works areas or the PTWs to ensure that sewage from site staff would be properly collected.

V

9.133

General refuse should be stored in enclosed bins, skips or compaction units separating from C&D material and disposed of at designated landfill.

V

9.135

The recyclable component of the municipal waste generated by the workforce, such as aluminium cans, paper and cleansed plastic containers should be separated from other waste. Provision and collection of recycling bins for different types of recyclable waste should be set up by the Contractor. The Contractor should also be responsible for arranging recycling companies to collect these materials.

V

9.137

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, and incompatible chemicals should be stored separately.  Appropriate labels should be securely attached on each chemical waste container indicating the corresponding chemical characteristics of the chemical waste, such as explosive, flammable, oxidizing, irritant, toxic, harmful, corrosive, etc.  The Contractor shall use a licensed collector to transport and dispose of the chemical wastes, to either the approved Chemical Waste Treatment Centre, or another licensed facility, in accordance with the Waste Disposal (Chemical Waste) (General) Regulation.

@

9.142

Prior to excavation of the marine deposit layer, the deposit should be tested in accordance with the ETWB TC(W) No. 34/2002 and the results should be presented in a Preliminary Sediment Quality Report. The marine deposit should be disposed of at the disposal site designated by the Marine Fill Committee (MFC) or Director of Environmental Protection (DEP) depending on the test results.

 

 

N/A

E

Terrestrial Ecology

 

 

10.93

To implement effective noise mitigation measures as recommended in Section 4 of EIA.

All construction sites

 

V

10.94

Dust control practices such as regular watering, complete coverage of any aggregate or dusty material storage piles, and re-schedule of dusty activities during high-wind conditions as well as other measures recommended in Section 3 of EIA, should be implemented.

@

10.95

Fences/hoardings should be erected and installed along the boundary of the works areas.

V

10.96

Standard good site practices as suggested in Section 10 of EIA should be implemented.

@

10.97

Provision of proper drainage system and runoff control measures such as use of sand/silt traps, oil/grease separators, sedimentation tanks, etc.

@

F

Landscape and Visual

 

 

Table 13.7

 

Topsoil, where identified, should be stripped and stored for re-use in the construction of the soft landscape works, where practical.

All construction sites

 

 

N/A

Existing trees to be retained on site should be carefully protected during construction.

@

Trees unavoidably affected by the works should be transplanted where practical.

V

Compensatory tree planting should be provided to compensate for felled trees.

N/A

Control of night-time lighting.

V

Table 13.7

Erection of decorative screen hoarding compatible with the surrounding setting.

All construction sites

 

N/A

G

Marine Ecology

 

 

11.135

To minimize the potential indirect impacts on water quality from construction site runoff and various construction activities, the practices outlined in ProPECC PN 1/94 Construction Site Drainage should be adopted.

All construction sites

 

@

H

Hazard to Life

 

 

14A.201

Limiting use of cranes in terms of locations, lifting height, swing angle and setting up safety zone.

 

Exact location will be determined on construction site by the engineer

V

 

Legend:    V = implemented;     

x = not implemented;

@ = partially implemented;

N/A = not applicable