11 FUTURE KEY ISSUES

Key Issues in the Coming Two Months

11.1 The major site activities, potential environmental impacts and recommended mitigation measures for the coming two months are shown in Table 11.1.

Table 11.1 Summary Table for Site Activities, Potential Environmental Impacts and Recommended Mitigation Measures in the coming Two Months

Contract No.	Major Site Activities (November and December 2020)	Location/ Working Period	Potential Environmental Impact	Recommended Mitigation Measures
ND/2019/01	(a) Site clearance	Portion 1f, 2, 5, 6a,7,8a,9c, 10a, 10b	- Construction Dust impact - Noise Impact (Construction Phase) - Water Quality Impact (Construction Phase) - Waste Management (Construction Waste)	Air - Regular watering on exposed worksites and haul road. - Cover the stockpiles or dusty materials. - Deploy water browsers to water the haul road. - Deploy mist-cannon on site - Install sprinkler system for dust suppression. - Erect scaffolding with dust screens for demolition of existing structure. - Provide shelter with top and 3-sides for cement production activities. - Entirely cover the Arsenic-containing soil. - Store the bulk cement in enclosed silo tank for Solidification / Stabilization treatment. - Close the mechanical cover of the vehicles used for transporting dusty materials. - Establish vehicle wheel washing facilities at vehicle exit points. - Speed control of site vehicles. - Shotcrete on exposed slope. - Erect solid site hoarding. Noise - Regular inspect of construction plants in good condition - Provide temporary noise screens if necessary. - Use of Quiet plants (QPME) and working methods if possible. - Sequencing operation of construction plants where practicable. - Shut down the machines and plant if not in use. - Only well-maintained plant to be operated on-site. - Mobile plant to be sited as far away from NSRs as possible and practicable. - Conduct noise monitoring regularly. Water - Re-circulation / re-use of water to minimize wastewater generation. - Set up wastewater treatment system (AquaSed) on site. - Erect soil bund / temporary drain to divert /collect surface runoff. - Maintain the drainage and wastewater treatment facilities. Waste Management - Sort out demolition debris and excavated materials from demolition works to recover reusable / recyclable portions. - Provide recycling bin on site, encourage reuse and recycle as much as possible. - Provide drip tray for chemical containers. - Chemical spill kit available on site. - Chemical waste cabinet available on site. - Chemical wastes to be stored in appropriate containers and collected by a licensed chemical waste collector. - Delivery of yard waste to EcoPark for reuse.
	(b) GI works	Portion 2, 7
	(c) Excavation	Portion 6a, 10a
	(d) Construction of temporary road	Portion 7, 8a
	(e) Construction of retaining wall	Portion 8a
	(f) Sheetpiling	Portion 6a, 10a
	(g) Soil nailing / shotcrete	Portion 6a, 8a
	(h) Demolition of existing structure	Portion 11a
	(i) Pre-bored H pile	Portion 6a
	(j) Pilot trial for arsenic soil treatment works	Portion 6b
ND/2019/02	(a) GI	Portion 7, 9, 10	Air, Water,Waste	- Dusty works should be sprayed with water or idle stockpile or slope should be covered by Tarpaulin sheet properly. - Plants should be well maintained to prevent dark smoke and oil leakage. Idle plant should be turned off. - Drip tray should be provided for all chemical and stationary plants. - No construction works shall be carried out in restricted hours (7:00 pm to 7:00 am) unless CNP is obtained. - Waste should be sorted and disposed according to the Waste Management Plan - No direct discharge of wastewater into storm drains is allowed. Wastewater must be de-silted before discharged in accordance with the water discharge licence. - Dull green barrier and ecological measures should be implemented according to the Ecological protection plan.
	(b) Tree Felling	Portion 7, 10	Air, Noise,Waste
	(c) ELS	Portion 7, 9, 10	Air, Noise,Water, Waste, Ecology
	(d) Hoarding erection	Portion 7, 9, 10	Air, Noise,Water, Waste
	(e) Pre-bored Socketed H-pile	Portion 7, 9, 10	Air, Noise, Water, Waste, Ecology
	(f) Lowering the Existing Carriageway	Portion 9	Air, Noise, Water, Waste, Ecology
	(g) Footpath improvement work	Portion 1	Air, Noise, Water, Waste
ND/2019/03	(a) Excavation of irrigation channel	Long Valley	- C&D waste - Air pollution - Noise pollution	- Watering exposed earth regularly - Cover C&D material by tarpaulin - Adopt QPME for excavation
	(b) Excavation of trench in Yin Kong Road	Portion 1 and Portion 1A	- C&D waste - Air pollution - Noise pollution - Water pollution	- Watering exposed earth regularly - Cover C&D material by tarpaulin - Noise barrier for screening from source of noise - Wastewater will be treated before discharging to channel
	(c) Demolition of existing structure	Long Valley	- C&D material - Air Pollution	- Cover C&D material by tarpaulin - Watering while demolish the structure
	(d) Construction works of storage shed and Type 2 Storage House	Long Valley	- C&D material - Air Pollution	- Watering exposed earth regularly - Cover C&D material by tarpaulin
	(e) Asbestos Removal in Long Valley	Long Valley	- Air Pollution	- Removing the asbestos containing material according to requirement of COP
ND/2019/05	(a) Bored piling	D2-02, E2-02& E3-02	- Construction Dust Impact - Noise Impact - Water Quality Impact (Construction Phase) - Waste Management (Construction Waste)	- Regular watering on exposed worksites and haul road - stockpiling area should be provided with covers and water spraying system - only well-maintained plant to be operated on-site - plant known to emit noise strongly in one direction, where possible, be orientated so that the noise is directed away from nearby NSRs; - mobile plant to be sited as far away from NSRs as possible practicable - All open stockpiles of construction materials of more than 50m^3 to be covered with tarpaulin - Manholes to be adequately covered and temporarily sealed so as to prevent silt, construction materials or debris being washed into the drainage system - All vehicles and plant to be cleaned before leaving a construction site to ensure no earth, mud, debris and the like is deposited by them on roads. - Segregate and store different types of waste in different containers, skip or stockpiles to enhance reuse or recycling of materials and their proper disposal - Sort out demolition debris and excavated materials from demolition works to recover reusable/recyclable portions - Provide training to workers on appropriate waste management procedures, including waste reduction, reuse and recycling - To adopt other good site practice, such as arrangements for collection and effective disposal to an appropriate facility, of all wastes generated at the site and regular cleaning and maintenance programme for drainage - Chemical wastes to be stored in appropriate containers and collected by a licensed chemical waste Contractor. Chemical wastes (e.g. spent lubricant oil) should be recycled at an appropriate facility as far as possible, while the chemical waste that cannot be recycled should be disposed of at either the Chemical Waste Treatment Centre, or another licensed facility, in accordance with the Waste Disposal (Chemical Waste) (General) Regulation
	(b) Socketed H-pile installation	Ho Ka Yuen Footbridge
	(c) Formation of site entrance	C1-02 and C3-03
	(d) Construction of haul road, temporary footpath and cycle track	D2-02, C4-01a, C2-01
	(e) Road widening, site clearance and tree pruning for haul road	E2-02
	(f) Structural works	Project Manager¡¦s Site Accommodation
	(g) Public service removal application	Jockey Club Road
	(h) Permanent footpath construction	Jockey Club Road
	(i) Removal of existing noise barrier	Tai Wo Service Road West
	(j) Pedestrian Refuge Island Removal	Tai Wo Service Road West
	(k) Underground utility diversion	Tai Wo Service Road West
	(l) Box culvert BC5 and associated drainage construction	Tai Wo Service Road East
	(m) Temporary removal of noise barrier and sign gantry for D2-03 construction	Fanling Highway
ND/2019/06	(a) Construction of finishing works, E&M works and Building Services works of Management Office Building (MOB)	Portion 4	- Noise pollution - Water pollution	- Adopt noise barrier in screening noise - Wastewater generated after wheel washing of vehicles should be treated properly before discharge
	(b) Installation of steel canopy column	Portion 3	- Noise pollution	- Adopt noise barrier in screening noise
	(c) Construction of underground utilities in the final stage market	Portion 3	- C&D waste - Air pollution - Noise pollution - Water pollution	- Cover C&D waste by impervious sheeting - Spray with water to work area before, during and after the work - Adopt QPME for excavator - Wastewater generated after wheel washing of vehicles should be treated properly before discharge
	(d) Tree felling	Portion 6	- C&D waste - Noise pollution	- Cover C&D waste by impervious sheeting - Adopt QPME for excavator
	(e) Off-site fabrication and welding test of columns and steel truss of steel canopy	Fabrication yard in China	None	None
	(f) Demolition of existing public toilet	Portion 5	- C&D waste - Air pollution - Noise pollution - Water pollution	- Cover C&D waste by impervious sheeting - Spray with water to work area before, during and after the work - Adopt QPME for excavator - Wastewater generated after wheel washing of vehicles should be treated properly before discharge
	(g) Slope improvement works	Portion 6	- C&D waste - Air Pollution - Noise Pollution	- Cover C&D waste by impervious sheeting - Spray with water to work area before, during and after the work - Adopt QPME for excavator

11.2 The major site activities in coming two months is shown in Table IV.

Monitoring Schedule for the Next Month

11.3 The tentative environmental monitoring schedule for the next month is shown in Appendix D.

Construction Programme for the Next Month

11.4 A tentative construction programme is provided in Appendix A.