Environmental Mitigation Implementation Schedule

Environmental Protection Measures

Timing

Implementation Stages

Oct 06

Nov 06

Dec 06

Jan 07

Construction Air Quality

 

 

 

 

Twice daily watering

All unpaved haul roads, bulldozed material, exposed site areas

b

N/A

N/A

N/A

Collection of dust through a fabric filter

Concrete batching plants

N/A

N/A

N/A

N/A

Include contract clauses for environmental protection

All areas

b

N/A

N/A

N/A

Construction Noise

 

 

 

 

Noisy equipment and activities should be sited by the Contractor as far away from sensitive receivers as is practical

All areas

b

N/A

N/A

N/A

Replace noisy plant with quieter alternatives

All areas

b

N/A

N/A

N/A

Hand held breakers to comply with EEC Technical Directive 84/537

All areas of road removal

b

N/A

N/A

N/A

Portable compressors to comply with EEC Technical Directive 84/533

Work yards, all areas where pile cap, column superstructure, surfacing and retaining wall works are underway

b

N/A

N/A

N/A

Idle equipment should be turned off or throttled down

All areas

b

N/A

N/A

N/A

Quieter power units of stationary and earth moving plant with partial or full enclosures or vibratory isolation

All areas

b

N/A

N/A

N/A

Properly maintain powered mechanical equipment

All areas

b

N/A

N/A

N/A

Use temporary noise barriers or earth embankments where practicable. Details of the type, length, height and material shall be submitted to DEP for agreement no later than 1 month before construction. Surface density of portable barriers should not be less than 7kg/m2

All areas

b

N/A

N/A

N/A

Schedule noisy activities to reduce duration and severity of noise

All areas

b

N/A

N/A

N/A

Shield prefabrication and concrete batching for SR4

Western workyard

N/A

N/A

N/A

N/A

Design details (length, height, material and type) of portable noise barrier of the Castle Peak Road Improvement Project shall be submitted to EPD no later than 1 month before commencement of construction of the project. The portable barriers shall have a surface density of not less than 7kg/m2

All areas

b

N/A

N/A

N/A

For each stage of the work specified in Section 2.1 of the Project Profile, submitted on 16 February 2001, only 1 set of the equipment as specified in Table 1 of the Project Profile shall be used at the same time

Sham Tseng East Reclamation

N/A

N/A

N/A

N/A

All plant and equipment to be used on the construction site shall be properly maintained in good operating condition. Silencers, mufflers, acoustic linings or shields, acoustic sheds or screens shall be used to avoid disturbance to any nearby noise sensitive receivers

Sham Tseng East Reclamation

N/A

N/A

N/A

N/A

Include contract clauses for environmental protection

All areas

b

N/A

N/A

N/A

Construction Water Quality

 

 

 

 

Bund all active work areas to 110% capacity

All areas

b

b

b

b

Obtain discharge consent

Site offices

b

b

b

b

Direct drainage as far away as possible from sensitive areas

All areas

b

b

b

b

Provide proper sewage treatment and disposal facilities in the form of chemical toilets for site workers

All areas

b

b

b

b

Undertake works close to beaches outside the designated bathing seasons

All areas

b

b

b

b

Include contract specifications for environmental protection

All areas

b

b

b

b

All design and construction measures described in the submission approved or deposited under conditions 2.1, 2.2, 2.3 and 2.4 of the Environmental Permit AEP-095/2001 shall be fully implemented.

All areas

b

b

b

b

Dredging of marine sediment shall be limited to the scour apron

Sham Tseng East Reclamation

N/A

N/A

N/A

N/A

No more than 1 derrick lighter shall be used for marine dredging works. The total maximum dredging rate shall not be more than 200 m3 per day

Sham Tseng East Reclamation

N/A

N/A

N/A

N/A

All filling activities shall be carried out behind rockfill and rock armour

Sham Tseng East Reclamation

N/A

N/A

N/A

N/A

Tightly closed grabs shall be used to restrict the loss of fine sediment to suspension

Sham Tseng East Reclamation

N/A

N/A

N/A

N/A

Silt curtains shall be used along the reclamation area during construction to control sediment suspension within the work area

Sham Tseng East Reclamation

N/A

N/A

N/A

N/A

The construction method specified in Section 2.1 of the Project Profile submitted on 16 February 2001 shall be followed during the construction

Sham Tseng East Reclamation

N/A

N/A

N/A

N/A

Surface run-off from the Castle Peak Road Improvement Project sites shall be directed into adequately designed sand/silt removal facilities such as sand traps, silt traps and sediment basins before discharge into storm drains. Channels, earth bunds or sand bag barriers shall be provided on site to properly direct stormwater to such silt removal facilities

All areas

@

b

b

b

Catchpits and perimeter channels shall be constructed in advance of site formation works and earthworks of Castle Peak Road Improvement Project

All areas

b

b

b

b

Silt removal facilities, channels and manholes of the Castle Peak Road Improvement Project shall be suitably maintained. The deposited silt and grit shall be removed at least once per week, and at the onset of and after each rainstorm to ensure that these facilities of the Castle Peak Road Improvement Project are functioning at all times

All areas

@

b

b

b

Open stockpiles of construction material (e.g. Aggregates and sand) on the work sites for the Castle Peak Road Improvement Project shall be covered with tarpaulin or similar fabric during rainstorms. Such measures as providing sand barriers shall be taken to prevent the washing away of construction material, soil silt and debris into any drainage channel.

All areas

b

@

@

@

All manholes (including any newly constructed ones) of the Castle Peak Road Improvement Project shall be adequately covered and temporarily sealed so as to prevent silt, construction materials or debris from getting into the drainage system

All areas

b

b

b

b

A marine water quality and audit programme shall be carried out during the construction stage. One monitoring station shall be located at the Ma Wan Fish Culture Zone. A marine water quality monitoring and audit manual shall be issued to EPD for approval no later than 1 month prior to commencement of construction of the project

All areas

b

b

b

b

Construction Waste

 

 

 

 

Segregate different categories of waste

All areas

b

N/A

N/A

N/A

Use as much excavated spoil on site as possible

All areas

b

N/A

N/A

N/A

Register chemical and maintenance wastes

All areas

b

N/A

N/A

N/A

Bund chemical material storage areas to 120% capacity

Works yards

b

N/A

N/A

N/A

Do not connect chemical material storage areas to the foul or stormwater drainage system

Works yards

b

N/A

N/A

N/A

Store and label dangerous goods

All areas

b

N/A

N/A

N/A

Pack dangerous goods suitably to prevent leakage during transportation

All areas

b

NA

NA

NA

Prevent disposal of hazardous materials to air, soil, water bodies

All areas

@

N/A

N/A

N/A

Provide refuse containers at all work areas

All areas

@

N/A

N/A

N/A

Discharge human waste into septic tanks

All areas

N/A

N/A

N/A

N/A

Landscape and Visual

 

 

 

 

Off-site planting works to ameliorate landscape and visual impacts

All areas

b

N/A

N/A

N/A

Semi-ornamental planting to provide a coordinated streetscape and interface with road junctions

Urban areas

N/A

N/A

N/A

N/A

Verge planting to enhance the view from the road and soften the overall appearance of the route

All areas

N/A

N/A

N/A

N/A

Woodland hydroseeding

Slopes

b

N/A

N/A

N/A

Screen planting

Shortcrete areas

N/A

N/A

N/A

N/A

Edge planting

Exposed rock slopes

N/A

N/A

N/A

N/A