12 FUTURE KEY ISSUES

Key Issues in the Coming Two Months

12.1 The major site activities, potential environmental impacts and recommended mitigation measures for the coming two months are shown in Table 12.1.

Table 12.1 Summary Table for Site Activities, Potential Environmental Impacts and Recommended Mitigation Measures in the coming Two Months

Contract No.	Major Site Activities (February and March 2021)	Location/ Working Period	Potential Environmental Impact	Recommended Mitigation Measures
ND/2019/01	(a) Site clearance	Portion 1f, 2, 3, 5, 6a, 7, 9c, 10b, 14, 16	- 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. - 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. - Erect silent-up noise barrier at Portion 6b 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 or other agreed alternative site..
	(b) GI works	Portion 2, 3, 5, 8a, 8b
	(c) Excavation	Portion 6a, 10a
	(d) Construction of temporary road	Portion 7, 9b
	(e) Construction of retaining wall	Portion 8a
	(f) Sheetpiling	Portion 6a, 10a
	(g) Soil nailing / shotcrete	Portion 2, 5, 6a, 8a
	(h) Construction of CLC and site accommodation at Portion 7	Portion 7, 16
	(i) Pre-bored H pile	Portion 6a
	(j) Pilot trial for arsenic soil treatment works	Portion 6b
ND/2019/02	(a) Pipe Jacking	Portion 1, 2	Air, Noise, 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) Inspection Pit	Portion 1, 2	Air, Noise,Water, Waste,
	(d) Hoarding and Dull green barrier erection	Portion 7, 9, 10	Air, Noise, Waste
	(e) Pre-bored Socketed H-pile	Portion 7, 9, 10	Air, Noise, Water, Waste, Ecology
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) Ground investigation works	D32. D28, D38, D39, DH024 and slope GI at Tai Wo Service Road West, Jockey Club Road	- Construction Dust Impact - Noise Impact - Water Quality Impact (Construction Phase) - Waste Management (Construction Waste) - Landscape and Visual - Cultural Heritage	- 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 - Conducting Construction Vibration Monitoring - Tree Protection & Preservation ¡V Exiting trees to be retained within the Project site should be carefully protected during construction. In particular OVTs will be preserved according to ETWB Technical Circular (Works) No. 29/2004. - Tree Transplantation ¡V Tree unavoidably affected by the Project works should be transplanted where practical. Tree should be transplanted straight to their final receptor site and not held in a temporary nursey as far as possible. - Erect 2m high dull green site boundary fence. - Light Control ¡V Construction day and night time should be controlled to minimize glare impact to adjacent VSRs during the Construction phase.
	(b) Pre drilling for bored piles	C4-03, D1 and E1
	(c) Bored piling	C3-03, C3-04, C4-03, C4-04, E2-02, D2-02, E3-02 and E3-03
	(d) Socketed H-pile installation	Ho Ka Yuen Footbridge
	(e) Construction of haul road	D2-02
	(f) Construction of Footpath	Jockey Club Road
	(g) Site formation	Portion Xlll
	(h) Utitilies Diversion Works	TWSRW
	(i) Project Manager¡¦s Site Accommodation Construction	Works Area A
	(j) Tree Transplant	Works Area A
	(k) TTA	Jockey Club Road
	(l) Drainage & Water Mains construction	Box culvert BC5, TWSRE
	(m) Temporary removal of noise barrier and sign gantry	D2-03 at Fanling Highway
	(n) UU diversion	Tai Wo Service Road West
	(o) Rockfill slope construction	Jockey Club Road
	(p) Road works for temporary road diversion	D2-03
	(q) Retaining wall construction	FW06
	(r) Slope construction	C363
	(s) Footbridge staircase demolition	Ho Ka Yuen Footbridge
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 discharging
	(d) Formation of carriageway and footway	Portion 3	- C&D waste - Noise pollution	- Cover C&D waste by impervious sheeting - Adopt noise barrier in screening noise
	(e) 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
	(f) Mini-pile works	Portion 3 and 5	- Air Pollution - Water Pollution - Noise Pollution	- Provide screening to prevent dust emission - Provide bunding to control wastewater within the piling site & treat before discharging - Erect noise barrier to screen out noise generated from the piling rig

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

Monitoring Schedule for the Next Month

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

Construction Programme for the Next Month

12.4 A tentative construction programme is provided in Appendix A.