Appendix C - Implementation Schedule of Environmental Mitigation Measures (EMIS)

Air Quality - Schedule of Recommended Mitigation Measures

Impact

Mitigation Measures

Timing

Implementation Status

Air Quality during Construction

·  Careful sitting of construction activities which generate substantial amount of dust can effectively reduce the overall impact.

During construction

V

·  Use of regular watering, with complete coverage if possible, to reduce dust emissions from exposed site surfaces and unpaved roads and for dusty construction areas and areas close to ASRs, particularly during dry weather.

V

·  Open stockpiles shall be avoided. Side enclosure and covering of any aggregate or dusty material storage piles to reduce emissions.  Where possible, prevent placing dusty material storage piles near ASRs. Where this is not practicable owing to frequent usage, watering shall be applied to aggregate fines.

V

·  No free falling construction debris should be allowed; debris should be let down by hoist or enclosed tunnel to the ground.

N/A

·  All dusty materials should be sprayed with water prior to any loading, unloading or transfer operation so as to maintain the dusty materials wet.

V

·  Provision of wind shield and dust extraction units or similar dust mitigation measures at the loading points, and use of water sprinklers at the loading area where dust generation is likely during the loading process of loose material, particularly in dry seasons/ periods.

V

·  Height from which dusty materials are dropped should be controlled to a minimum practical height to limit fugitive dust generation from unloading.

N/A

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

V

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

V

·  Establishment and use of vehicle wheel and body washing facilities at the exit points of the site and public roads, combined with cleaning of public roads wherever necessary and practical.

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 hardcores.

V

·  Provision of not less than 2.4m high hoarding from ground level along site boundary where adjoins a road, streets or other accessible to the public except for a site entrance or exit.

V

·  Imposition of speed controls for vehicles on site haul roads. Where feasible, routing of vehicles and positioning of construction plants should be at a maximum possible distances from sensitive receivers.

V

·  Every stock of more than 20 bags of cement or dry pulverised fuel ash (PFA) should be covered entirely by impervious sheeting or placed in an area sheltered on the top and the 3 sides.

N/A

·  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.

V

       

 

Noise - Schedule of Recommended Mitigation Measures

Impact

Mitigation Measures

Timing

Implementation Status

Construction Noise during Construction

·  In order to reduce the excessive noise impacts at the affected NSRs during normal daytime working hours, the following mitigation measures shall be implemented:-

-       adopting quiet powered mechanical equipment;

-       scheduling of works;

-       erect a 3m tall moveable noise barriers along the site boundary; and

-       noise enclosure.

During construction

V

·  Only well-maintained plant should be operated on-site and plant should be serviced regularly.

V

·  Silencers or mufflers on construction equipment should be utilized and should be properly maintained.

V

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

V

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

V

·  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.

V

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

V

·  Use of acoustic barriers as close to the source as possible. Equipment to be shielded: air compressor, water pump, concrete pump, dumper, dump truck, generator, various hand tools, saw, excavator, loader, truck mixer, mobile crane, vibrator and breaker.

During examination periods of the school nearby

V

 


Water Quality - Schedule of Recommended Mitigation Measures

Impact

Mitigation Measures

Timing

Implementation Status

Water Quality during Construction

Construction works at or close to the seafront

·  Temporary storage of construction materials (e.g. equipment, filling materials, chemicals and fuel), chemical waste storage area and temporary stockpile of construction and demolition materials should be located well away from the seawater front and storm drainage during carrying out of the works.

During construction

V

·  Stockpiling of construction and demolition materials and dusty materials should be covered and located away from the seawater front and storm drainage.

V

·  Construction debris and spoil should be covered up and/or disposed of as soon as possible to avoid being washed into the nearby receiving waters.

V

Construction run-off and Drainage

The site practices outlined in ProPECC PN 1/94 “Construction Site Drainage” shall be followed as far as practicable in order to minimise surface runoff and the chance of erosion, and also to retain and reduce any suspended solids prior to discharge.  These practices include, inter alia, the following items:-

During construction

V

·  Provision of perimeter channels to intercept storm-runoff from outside the site. These shall be constructed in advance of site formation works and earthworks.

 

·  Vehicle and plant servicing areas, vehicle wash bays and lubrication bays should as far as possible be located within roofed areas. The drainage in these covered areas should be connected to foul sewers via a petrol interceptor and/or oil/grease separator. Oil leakage or spillage should be contained and cleaned up immediately. Waste oil should be collected and stored for recycling or disposal in accordance with the Waste Disposal Ordinance.

V

·  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 should be based on the guidelines provided in ProPECC PN 1/94.  All drainage facilities and erosion and sediment control structures should be inspected monthly, regularly cleaned and maintained to ensure proper and efficient operation at all times and particularly during rainstorms.

V

·  Careful programming of the works to minimise the potential of soil erosion during the rainy season.  Other measures that need to be implemented before, during, and after rainstorms are summarized in ProPECC PN 1/94.

V

·  Exposed soil surface shall be protected by paving as soon as possible to reduce the potential of soil erosion.

V

·  Open stockpiles of construction materials on site shall be covered with tarpaulin or similar fabric during rainstorm.

V

General Construction Activities

·  Debris and rubbish generated on-site shall be collected, handled and disposed of properly to avoid entering the nearby nullah and stormwater drains. Stockpiles of cement and other construction material should be kept covered when not being used.

During construction

V

Water Quality during Construction

·  Oils and fuels should 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 should be drained of rainwater after a rain event.

V

Sewage Effluent

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

During construction

V

·  Effluent discharged from the construction site should comply with the standards stipulated in the TM-DSS.

V

·  Subject to the sampling results of Contamination Assessment Plan of the site, any contaminated land treatments are subjected to EPD’s requirements on handling, treatment and disposal.   Should effluent stream and/or extracted ground water be discharged from the site, the discharge shall comply with the WPCO and any EPD special requirements.

N/A

·  Establishment of baseline and impact monitoring program to establish the baseline water quality condition and monitor the construction process in order to enforce controls and modify method of work if any adverse impacts on the water sensitive receivers are detected.

V

 

Waste Management- Schedule of Recommended Mitigation Measures

Impact

Mitigation Measures

Timing

Implementation Status

Waste Management during Construction

Good Site Practice

·  Nominate an approved personnel, such as a site manager, to be responsible for good site practices and effective arrangements for collection and disposal to an appropriate facility of all wastes generated at the works area.  Training of site personnel in proper waste management and handling procedures shall be undertaken.

During construction

V

·  Construction materials should be planned and stocked carefully to minimise and avoid unnecessary generation of waste.

V

·  General refuse shall be stored and collected separately from other construction and chemical wastes.  Provide on-site refuse collection facilities and enclosed transfer facility for storage and containment.

V

·  Waste points should be provided sufficiently and waste should be collected regularly.

V

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

V

·  Separate chemical wastes for special handling and appropriate treatment at the Chemical Waste Treatment Centre located at Tsing Yi.  Chemical waste shall be handled according to the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.

 

V

Waste Management during Construction

 

 

 

 

 

 

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

During construction

V

·  Develop procedures such as a trip-ticket system to monitor the disposal of C&D material and solid wastes at public filling areas and landfills, and to control fly-tipping.

V

·  A recording system for the amount of wastes generated, recycled and disposed should be proposed.

V

Waste Reduction Measures

Good management and control can prevent the generation of a significant amount of waste.  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:-

 

During construction

 

·  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 aluminum 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 remaining functional capacity shall be recycled.

V

·  Use of reusable non-timber formwork to reduce the amount of C&D material.

V

·  Prior to disposal of C&D waste, it is recommended that wood, steel and other metals shall be separated for re-use and / or recycling to minimise the quantity of waste to be disposed of to landfill.

V

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

V

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

V

General Site Wastes

·  Collection area for construction site waste should be provided where waste can be stored prior to removal from site.

During construction

V

·  An enclosed and covered area for the collection of the waste is recommended to reduce ‘wind blow’ of light material.

V

·  An open area used for storage or loading/unloading of wastes should be bunded and all the polluted surface run-off collected within this area should be diverted into sewers.

V

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

V

Workforce Wastes

·  Suitable collection sites around site offices and canteen should be required.

 

During construction

V

·  Waste should be removed daily or as often as required.

 

V

Waste Management during Construction

Chemical Waste

·  After use, chemical waste (for example, cleaning fluids, solvents, lubrication oil and fuel) should be handled according to the Code of Practice on the Package, Labelling and Storage of Chemical Wastes.

During construction

V

·  Waste should be properly stored on site within suitably designed containers and should be collected by approved licensed waste collectors for disposal at the Chemical Waste Treatment Centre (CWTC) or other licensed facility in accordance with the Waste Disposal Chemical Waste (General) Regulation.

@V

·  Any service shop and minor maintenance facilities should be located on hard standing within a bunded area, and sumps and oil interceptors should be provided.

During construction

N/A

·  Provision of appropriate on-site temporary storage facility for any asbestos containing materials (ACM) where necessary.  Storage facilities shall be designed in accordance with the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.

V

·  Employ registered contractors for removal of ACM off-site and disposal at a designated landfill site.

V

Construction and Demolition Material

·  The selective demolition method is recommended to be employed to minimize the effort of sorting mixed C&D materials.

During construction

 

V

·  In order to minimise the impact resulting from collection and transportation of C&D material for off-site disposal, it is recommended that the public fill material generated from demolition works shall be re-used on-site as far as possible.

V

·  A suitable area should be designated to facilitate the sorting process and a temporary stockpiling area will be required for the separated materials. Separate construction and demolition material into C&D waste (non-inert material) and public fill (inert material) for appropriate disposal.  Public fill disposed at a public filling area shall only consist of earth, building debris, broken rock and concrete.  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.  Small quantities of timber mixed with otherwise suitable material would be permitted.  C&D waste, such as wood, glass, plastic, steel and other metals, shall be reused or recycled and, as a last resort, disposed to landfill.

V

 


 

Land Contamination - Schedule of Recommended Mitigation Measures

Impact

Mitigation Measures

Timing

Implementation Status

Land Contamination (For inaccessible lots and lots which the Permit Holder opt to re-assess in accordance with the Risk-Based Remediation Goals (RBRGs) approach)

·  Further land contamination assessments to be carried out for inaccessible lots, lots which the Permit Holder opt to re-assess in accordance with the RBRGs approach, as well as areas that required further sampling to ascertain contamination extent. Supplementary CAP, CAR and RAPs to be submitted to EPD for endorsement before commencement of remediation work. These reports shall detail the further sampling & remediation works required. The development construction work shall only commence after all the remediation work has been completed.

Inaccessible lots as described under para. 3.5 of Appendix 7A of YTB-EIA as well as areas that required further sampling to ascertain contamination extent/ Upon availability of site access

Supplementary CAP, CAR and RAPs to be submitted to EPD for endorsement before commencement of the remediation work. 

 

Development construction work should only commence after all the remediation work has been completed.

V

 

(Two CAPs (Yau Tong Bay - Decommissioning of Shipyard Sites

Supplementary CAP for Previous Inaccessible Lots (YTML 27, 44, 45-46, 54 and Underground Oil Tank at YTML 6-11) & Yau Tong Bay - Decommissioning of Shipyard Sites (CAP for YTML 1, 6-11, 15, 28, 29, 38 and 41-43)) have been submitted to EPD and approved on 6 Jul 2011 and 30 Aug 2011 respectively.

The corresponding CARs and RAPs were submitted to EPD in June 2012 and were subsequently approved in June 2013 after two rounds of comment.)

 

Land Contamination (For inaccessible lots and lots which the Permit Holder opt to re-assess in accordance with the Risk-Based Remediation Goals (RBRGs) approach)

·  A method statement detailing the following shall be submitted to EPD for endorsement:-

-       Methodology, monitoring and verification procedures for biopiling and solidification;

-       Pilot test procedures for solidification process to ascertain the concrete mix receipe and leachability of the product;

-       The sample size for the verification soil test to be conducted by IEA for spot check purpose;

-       The notification system for notifying the Director the satisfactory completion of the excavation and treatment of contaminated soil; and

-       Provision and operation requirements of equipment and personnel decontamination facilities. 

All areas identified to require solidification of soil as land remediation / The pilot test results and method statement shall be submitted and endorsed at least one month prior to the full scale solidification works.

All soil identified and to be identified as contaminated with TPH / The method statement shall be submitted and endorsed at least one month prior to the commencement of the biopiling works.

V

 

(A method statement for biopiling and solidification has been submitted to EPD on 2 Oct 2013. The method statement is endorsed by EPD on 20 Dec 2013.)

Land Contamination (For inaccessible lots and lots which the Permit Holder opt to re-assess in accordance with the Risk-Based Remediation Goals (RBRGs) approach)

·  A Soil Remediation Report should be submitted to EPD to demonstrate that the remediation work has been properly carried out.

All areas identified to require soil and groundwater remediation / The Remediation Report shall be submitted and endorsed prior to the commencement of the development construction works.

N/A

·  Inspections for dioxin.  Should there be signs of incineration facilities, burn pits or facilities that utilises high temperature burning, soil sampling for dioxin will be carried out.  Details regarding such sampling shall be approved by EPD.  A detailed proposal for dealing with dioxin contaminated material, if found, shall also be submitted to EPD for approval.

All the Yau Tong Bay marine lots inspection and testing shall commence upon availability of site.

V

Land Contamination (For lots and facilities assessed under EIA with approved CAP, CAR and RAP based on Dutch B levels referenced to ProPECC PN3/94 – Contaminated Land Assessment and Remediation)

·  A pilot test shall be conducted to ascertain the concrete mix receipe and leachability of the product prior to a full scale solidification and a method statement detailing the solidification procedure (including the sampling proposal for process monitoring) shall be submitted to EPD for endorsement.

All areas identified to require solidification of soil as land remediation / The pilot test results and method statement shall be submitted and endorsed prior to the full scale solidification works.

V

 

(A pilot test to ascertain the concrete mix recipe was conducted on 30 Dec 2013. The method statement for solidification has been submitted to EPD on 2 Oct 2013 and subsequently endorsed by EPD on 20 Dec 2013.)

Land Contamination (For lots and facilities assessed under EIA with approved CAP, CAR and RAP based on Dutch B levels referenced to ProPECC PN3/94 – Contaminated Land Assessment and Remediation)

·  A method statement detailing the biopiling methodology, monitoring and verification procedures shall be submitted to EPD for endorsement.

All soil identified and to be identified as contaminated with TPH / The method statement shall be submitted and endorsed prior to the commencement of the biopiling works.

V

 

(The method statement for biopiling has been submitted to EPD on 2 Oct 2013 and subsequently endorsed by EPD on 20 Dec 2013.)

·  A Soil Remediation Report should be submitted to EPD to demonstrate that the remediation work has been properly carried out.

All areas identified to require soil and groundwater remediation / The Remediation Report shall be submitted and endorsed prior to the commencement of the development construction works.

 

N/A

 

Landscape and Visual Impact - Schedule of Recommended Mitigation Measures

Impact

Mitigation Measures

Timing

Implementation Status

Landscape and Visual Impact during Construction

·  On-site mature trees within the Project boundary shall be retained. Any mature tree shall not be transplanted or fell unless permission has been given by the EPD.

During construction

V@

·  During the biopiling process, the biopiles shall be limited to a height of less than 3m.

N/AV

·  Erection and maintenance of decorative screen/colour hoarding around the site.

V

 

Legend: V = implemented;

X = not implemented;

@ = partially implemented;

N/A = not applicable - No such work was undertaken or no such material was used on site.