11. Implementation Schedule of the Proposed Mitigation Measures for the Reclamation of Yau Tong Bay

Table 11.1 Implementation Schedule for Noise Control

EIA Ref ^#	EM&A Log Ref	Environmental Protection Measures/Mitigation Measures	Location/ Timing	Implementation Agent		Implementation Stages*				Relevant Legislation and Guidelines
EIA Ref ^#	EM&A Log Ref	Environmental Protection Measures/Mitigation Measures	Location/ Timing	Implementation Agent		Des	C	O	Dec	Relevant Legislation and Guidelines
Sec 3.7	Sec 2.3	· Use of quiet equipment · Erect a 3m tall noise barrier along the site boundary	Work site / Throughout the phases of the reclamation works		Contractor		ü			NCO
Sec 3.7	Sec 2.3	· Use of acoustic barriers as close to the source as possible. Equipment to be shielded: compressor, water pump, concrete pump, generator, various hand tools, saw, excavator, loader, truck mixer, mobile crane, vibrator and breaker.	Proposed school (RSCH2) to the east of the site / During examination periods	Contractor			ü			NCO

# All recommendations and requirements resulted during the course of EIA/EA Process, including ACE and/or accepted public comment to the proposed project.

* Des - Design, C - Construction, O - Operation and Dec - Decommissioning

Table 11.2 Implementation Schedule for Water Quality Control

EIA Ref^#	EM&A Log Ref	Environmental Protection Measures/Mitigation Measures	Location/ Timing	Implementation Agent	Implementation Stages*				Relevant Legislation and Guidelines
EIA Ref^#	EM&A Log Ref	Environmental Protection Measures/Mitigation Measures	Location/ Timing	Implementation Agent	Des	C	O	Dec	Relevant Legislation and Guidelines
Sec 4.8	Sec 3.9	Implementation of the following measure to avoid the accumulation of the pollutants within the embayed water during construction: · Construct a temporary channel / culvert to divert the existing culvert outfalls out of the YTB before the commencement of marine works.	Marine works site / Prior to commencement of marine works	Project proponent and contractor	ü	ü
Sec 4.8	Sec 3.9	Implementation of following measures for dredging and filling works during seawall construction and dredging works during the construction of stormwater box culvert: · Use closed grab dredgers for mud dredging for seawall foundation; · Place silt curtain around close grab dredgers during dredging and back filling of seawall foundation; · Maximum daily production rate shall not exceed 1550 m³day^-1 for dredging and 2200 m³day^-1 for sand filling; · Design and provision of a single layer of silt screens (typically made from synthetic geotextile fabrics, typical configuration shown in Fig. 4.82A) across the saltwater intakes at the Dairy Farm Ice Factory, the WSD’s Cha Kwo Ling and Yau Tong saltwater pumping stations; and · Inspection and maintenance of the silt screens and curtains.	Marine works site and at the identified water sensitive receivers / During seawall construction and the construction of the stormwater box culvert	Project proponent and contractor	ü	ü
Sec 4.8	Sec 3.9	Implementation of following measures for dredging and filling works during Phase 1 and Phase 2 reclamations: · Sand filling by bottom dumping) in Phase 1 and Phase 2 reclamations should commence after the completion of seawall construction should be +2.5m above the mean sea level with 50m seawall opening; · Place a single layer of silt curtain across (made from impervious material such as coated nylon) the seawall openings before sand filling by bottom dumping in the Phase 1 and Phase 2 reclamations (as shown in Fig. 4.80 and 4.81); · Maximum daily production rate shall not exceed 10,000 m³day^-1 for sand filling in Phase 1; · Maximum daily production rate shall not exceed 6,000 m³day^-1 for sand filling in Phase 2; · Design and provision of double layers of silt screens (typically made from synthetic geotextile fabrics, typical configuration shown in Fig. 4.82A) across the saltwater intakes at the Dairy Farm Ice Factory, the WSD’s Cha Kwo Ling and Yau Tong saltwater pumping stations; and · Inspection and maintenance of the silt screens and curtains through visual inspection and review of marine water quality at the intake; and · Should the monitoing results indicate continuous non-conformance, additional mitigation measures should be proposed by the contractor	Marine works site and at the identified water sensitive receivers / During Phase 1 and Phase 2 reclamations	Project proponent and contractor	ü	ü
Sec 4.8	Sec 3.9	Implementation of following measures for dredging and filling works during Phase 3 construction of proposed concrete decking near the mouth of YTB: · Provision of double layers of silt screens (typically made from synthetic geotextile fabrics, typical configuration shown in Figures 4.82A) across the saltwater intakes at the Dairy Farm Ice Factory, the WSD’s Cha Kwo Ling and Yau Tong saltwater pumping stations. · Inspection and maintenance of the silt screens through visual inspection and review of marine water quality at the intakes; and · Should the monitoing results indicate continuous non-conformance, additional mitigation measures should be proposed by the contractor.	Marine works site and at the identified water sensitive receivers / During Phase 3 construction	Project proponent and contractor	ü	ü
Sec 4.8	Sec 3.9	Design consideration for the future potential Reprovisioned Cha Kwo Ling Saltwater Intake: · If WSD intent to relocate the existing CKL Saltwater Pumping Station, the saltwater intake of the potential reprovisioned CKLSWPS should be located at below -2.0 mPD to avoid abstracting the surface sewage plume from the Yau Tong Sewage Pumping Station emergency outfall at Ko Fai Road; and · Optimal intake configuration should be reviewed and decided in the detailed design stage for the reprovisioning of the Cha Kwo Ling Saltwater Pumping Station.	Cha Kwo Ling Saltwater Intake / During detailed design stage	Project proponent and contractor	ü
Sec 4.8	Sec 3.9	Mitigation measures for the existing Cha Kwo Ling Saltwater Intake during the operation phase of the Project: · To avoid accumulation of floating debris at water below the decked promenade near the intake of existing CKLSPS, floating booms shall be deployed near the intake (Figure 4.82) and any floating debris detained by the floating booms should be collected and removed regularly. Air slots should be included in the detailed design of the decked promenade to enhance the air flow below.	Cha Kwo Ling Saltwater Intake / During operation phase (for floating booms) and during detailed design stage (for air slots)	Project proponent and contractor	ü		ü
Sec 4.8	Sec 3.9	Implementation of following pollution avoidance measures for dredging and dumping: · Mechanical grabs shall be designed and maintained to avoid spillage and shall seal tightly while being lifted (closed-grab clamshell dredgers); · All vessels shall be sized such that adequate clearance is maintained between vessels and the sea bed at all states of the tide to ensure that undue turbidity is not generated by turbulence from vessel movement or propeller wash; · All pipe leakages shall be repaired promptly and plant shall not be operated with leaking pipes; · Excess material shall be cleaned from the decks and exposed fittings of barges before the vessel is moved; · Adequate freeboard shall be maintained on barges to ensure that decks are not washed by wave action; · All barges shall be fitted with tight fitting seals to their bottom openings to prevent leakage of material; · Loading of barges shall be controlled to prevent splashing of dredged material to the surrounding water, and · Barges shall not be filled to a level which will cause the overflow of materials or polluted water during loading or transportation.	Marine works site, disposal ground and during transportation / During dredging and dumping activities	Contractor		ü
Sec 4.8	Sec 3.9	Implementation of the following special EPD procedures for avoidance of pollution for handling of contaminated mud: · The locations and depths of areas of contaminated marine sediments shall be indicated in the construction contract. (The stipulation of the sediment contamination details shall be conducted during preparation of the tender documents and is the responsibility of the project proponent or its agent); · Contaminated marine sediments shall be dredged, transported and placed in approved special dumping grounds in accordance with the EPD Technical Circular No. 1-1-92, Works Branch Technical Circular (WBTC) No. 22/92 and WBTC No. 6/92. · Contaminated mud shall be placed at a location and in such a manner as directed by the Management Team of CED; · All dumping operations shall be carried out in strict accordance with the method statement agreed by the DEP; · Employ a grab dredger with a closed watertight grab for dredging of contaminated marine mud; · Transport designated contaminated marine mud by split barge of not less than 750m³ capacity, well maintained and capable of rapid opening and discharge at the disposal site; · Design properly and maintain carefully all operational plant so as to minimize the risk of sediments or other pollutants being released into the water column and deposited in the seabed other than designated locations; · Fit all barges with tight fitting seals to their bottom openings to prevent leakage of material; · Release the mud rapidly and close the hoppers immediately; any material adhering to the sides of the hopper shall not be washed out of the hopper and the hopper shall remain closed until the barge next returns to the disposal site. The dumping vessel shall be stationary throughout the dumping operation;	Marine works site, disposal ground and during transportation / Dredging, transportation and disposal of contaminated sediment	Contractor		ü			EPD Technical Circular No. 1-1-92 Works Branch Technical Circular (WBTC) No. 22/92 and WBTC No. 6/92
		· Size all vessels such that adequate clearance is maintained between the seabed and vessels at all states of the tide, to ensure that undue turbidity is not generated by turbulence from vessel movement or propeller wash. Adequate freeboard shall be maintained on barges to ensure that decks are not washed by wave action;
		· Employ only barges equipped with automatic self-monitoring devices for the dumping operation, and shall co-operate with and facilitate the DEP to inspect the device and retrieve the record stored in the device on a regular basis;
		· Provide experienced full time personnel on board all dumping vessels and provide suitable training to ensure that appropriate methods to minimize pollution are implemented. Records shall be maintained to satisfy the DEP that there is no short dumping or dumping outside the designated Dumping Area. The Contractor shall also make available to the DEP and the secretary of Fill Management Committee (S/FMC), CED, at any time upon the written request of the DEP, all information and records relevant to the dredging and mud disposal operation. This information shall include, but not be limited to, all data on the plant used by the Contractor, up-to-date periodic data on production rates and record copies of Notification of Dumping which have been sent to the Management Team, etc.
Sec 4.8	Sec 3.9	Establish communication procedure between WSD and DSD for dealing with the event of potential emergency sewage discharge at the Yau Tong sewage pumping station. DSD should inform WSD of the details of such discharge through the emergency outfall, e.g. volume, timing and duration, in advance where possible. DSD should minimize the discharge and liaise with WSD to avoid discharge during peak operation hours of WSD’s saltwater pumping station.	During detailed design stage	Project proponent and contractor, WSD and DSD	ü
Sec 4.8	Sec 3.9	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.	Work sites / During construction stage	Contractor		ü
Sec 9.2	Sec 3.5	EM&A program · Baseline monitoring: to establish the baseline water quality conditions. For at least 4 weeks prior to the commencement of marine works, 3 days per week, at both mid-flood and mid-ebb tides. Interval between 2 sets of monitoring shall not be less than 36 hours.	Works site and designated monitoring locations / Prior to commencement of marine works	Contractor and Environmental Team		ü
Sec 9.2	Sec 3.6	EM&A program · Impact monitoring: to monitor the nearby water quality to identify any need for additional mitigation measures or modifying methods of work if non-compliance should arise. Monitoring to be carried out during construction of reclamation, 3 days per week (except at the CKLSPS where water quality monitoring will be undertaken every day), at both mid-flood and mid-ebb tides. Interval between 2 sets of monitoring shall not be less than 36 hours. The monitoring results for CKLSPS shall be submitted to WSD on a weekly basis. · If the impact monitoring results indicate that dredging/filling works have caused an adverse impact on water quality at the monitoring stations at the salt water intakes, for instance, non-compliance with WSD WQOs, appropriate actions, including the lowering of production rates for dredging and filling or rescheduling of works to avoid the peak saltwater intake hours, should be taken and additional mitigation measures should be implemented as necessary.	Works site and designated monitoring locations / During construction period	Contractor and Environmental Team		ü
Sec 9.2	Sec 3.7	EM&A program · Post-project monitoring: monitoring shall be carried out three 4-week periods (covering dry, wet and transitional seasons) in the same manner as the impact monitoring, plus monitoring of ammoniacal nitrogen and E. coli.	Works site and designated monitoring locations / After the completion of marine works	Contractor and Environmental Team		ü

# All recommendations and requirements resulted during the course of EIA/EA Process, including ACE and/or accepted public comment to the proposed project.

* Des - Design, C - Construction, O - Operation and Dec - Decommissioning

Table 11.3 Implementation Schedule for Waste Management and Mud Disposal

EIA Ref^#	EM&A Log Ref	Environmental Protection Measures/Mitigation Measures	Location/ Timing	Implementation Agent	Implementation Stages*				Relevant Legislation and Guidelines
EIA Ref^#	EM&A Log Ref	Environmental Protection Measures/Mitigation Measures	Location/ Timing	Implementation Agent	Des	C	O	Dec	Relevant Legislation and Guidelines
Sec 5.6	Sec 4.2	Transportation and disposal of dredged marine sediment · Dispose dredged sediments at designated marine disposal ground depending on level of contamination. · Bottom opening of barges shall be fitted with tight fitting seals to prevent leakage of material. Excess material shall be cleaned from the decks and exposed fittings of barges and hopper dredgers before the vessel is moved. · Loading of barges and hopper dredgers shall be controlled to prevent splashing of dredged material to the surrounding water, and barges or hoppers shall not be filled to a level which will cause the overflow of materials or polluted water during loading or transportation. · Monitoring of barge loading shall be conducted to ensure that loss of material does not take place during transportation. Transport barges or vessels shall be equipped with automatic self monitoring devices as specified by the DEP (Director of Environmental Protection).	Along transportation route and at marine disposal ground / During construction period	Contractor		ü			WBTC No. 3/2000 Management of Dredged/ Excavated Sediment
Sec 5.6	Sec 4.2	The need for any special disposal procedures for dredged contaminated sediments shall be examined in detail at the design stage of the Project, as necessary, based on the results of biological screening. The recommended special disposal methodology is the sealing of dredged contaminated sediments in geosynthetic containers in the hopper barge and to drop the geosynthetic containers with the contaminated sediment into the designated contaminated mud pit at East Sha Chau, where it would be covered by further mud disposal and later by the mud pit capping, thereby meeting the requirements for fully confined mud disposal. In the event that the biological test results show that special disposal arrangements are necessary, field trials are recommended to be undertaken during the detailed design site investigation stage (using uncontaminated mud) to establish the optimum container capacity and handling method, and to demonstrate the effectiveness of the recommended disposal method.	Work site / During design phase	Project proponent/ Contractor	ü				WBTC No. 3/2000
Sec 5.6	Sec 4.2	Good Site Practice and Waste Reduction Measures · 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. · Construction materials should be planned and stocked carefully to minimise and avoid unnecessary generation of waste. · 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. · Waste points should be provided sufficiently and waste should be collected regularly.	Marine works site and along transportation route to disposal location / During construction period	Contractor		ü
Sec 5.6	Sec 4.2	· Separate chemical wastes for special handling and appropriate treatment at the Chemical Waste Treatment Facility located at Tsing Yi. Chemical waste shall be handled according to the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes. · Regular cleaning and maintenance programme for drainage systems, sumps and oil interceptors. · 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. · A recording system for the amount of wastes generated, recycled and disposed should be proposed.				ü			Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes
Sec 5.6	Sec 4.2	To minimize the potential impact on health and safety/contamination exposure, the following protective measures shall be followed: · No unauthorized persons shall be allowed into the works areas, and necessary precautions shall be taken to prohibit unauthorized entry to the Site or works areas. · Eating, drinking, smoking or any practice that increases the probability of hand to mouth transfer and ingestion of material are prohibited . · Food, beverages, tobacco products, etc, are prohibited in any area designated as being contaminated. Adequate warning signs shall be posted to this effect. · Hands must be thoroughly washed upon leaving the works area, and before eating, drinking or any other activities. · All field personnel shall wear protective gear such as gloves to minimize exposure to any contaminated material.	During special disposal arrangements for seriously contaminated sediment	Contractor		ü
Sec 5.6	Sec 4.2	General Site Wastes · Collection area for construction site waste should be provided where waste can be stored prior to removal from site. · An enclosed and covered area for the collection of the waste is recommended to reduce ‘wind blow’ of light material.. · 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	Marine works site and along transportation route to disposal location / During construction period	Contractor		ü
Sec 5.6	Sec 4.2	Workforce Wastes · Suitable collection sites around site offices and canteen should be required · Waste should be removed daily or as often as required	Marine works site and along transportation route to disposal location / During construction period	Contractor		ü
Sec 5.6	Sec 4.2	Chemical Waste · After use, chemical waste should be handled according to the Code of Practice on the Package, Labelling and Storage of Chemical Wastes · Waste should be properly stored on site within suitably designed containers and should be collected by an approved licensed waste collectors for disposal at the Chemical Waste Treatment Centre (CWTC) or other licenced facility in accordance with the Chemical Waste (General) Regulation · 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 · 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. Employ registered contractors for removal of ACM off-site and disposal at a designated landfill site.	Marine works site and along transportation route to disposal location / During construction period	Contractor		ü			Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes
Sec 5.6	Sec 4.2	Construction and Demolition Material · The selective demolition method is recommended to be employed to minimize the effort of sorting mixed C&D 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 unsuitable material. 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. · A suitable area should be designated to facilitate the sorting process and a temporary stockpiling area will be required for the separated materials. Public fill should be re-used on-site in the reclamation works where possible.	Existing shipyard buildings and structures at Yau Tong Bay / During construction period	Contractor		ü

# All recommendations and requirements resulted during the course of EIA/EA Process, including ACE and/or accepted public comment to the proposed project.

* Des - Design, C - Construction, O - Operation and Dec - Decommissioning

Table 11.4 Implementation Schedule for Biogas Risk

EIA Ref^#	EM&A Log Ref	Environmental Protection Measures/Mitigation Measures	Location/ Timing	Implementation Agent	Implementation Stages*				Relevant Legislation and Guidelines
EIA Ref^#	EM&A Log Ref	Environmental Protection Measures/Mitigation Measures	Location/ Timing	Implementation Agent	Des	C	O	Dec	Relevant Legislation and Guidelines
Sec 6.5	Sec 5.2 to 5.4	Gas monitoring: · Monitoring should be undertaken via purposely installed wells within boreholes drilled into the fill material. · Where possible, monitoring wells should be located in areas designated for open space. · Concentrations of methane gas should be measured by portable gas monitoring instruments. Gas flow rates and fluxes should also be measured if emission velocities are not too low. · It is recommended that monitoring be undertaken monthly for a period of at least one year prior to the commencement of construction works on the reclamation. Subject to the review of the gas monitoring results and agreement with EPD, the length of the monitoring period may be required to be extended beyond one year.	Within reclaimed area and near reclamation perimeter (approx. 20 m from existing seawalls)	Contractor and Environmental Team		ü			Landfill Gas Hazard Assessment Guidance Note, EPD (1997)
Sec 6.5	Sec 5.5	Monitoring Guidelines & Precautionary Gas Protection Measures At this stage it is difficult to formulate specific guidelines on what protection measures would be required for the measured rates of gas emission as this would depend on the detailed design of the individual buildings to be constructed and the ‘at risk’ rooms identified. The following criteria may be used as general guidelines. Scenario 1 If rates of methane emission are consistently much less than the trigger value (10 L m^-2 per day), including monitoring occasions when atmospheric pressure is falling rapidly, it is considered that the buildings will not require gas protection measures. To be conservative, it is proposed to adopt an area of influence of 20 m²(radius of 2.5m), which would give: · Trigger value of 10 L m^-2 per day x 20 m² = 200 L per day emitted from the borehole The criterion for “safe” flow rate from a free venting borehole becomes: · Flow rate of methane (in terms of litre per day) < 200 L per day; or · (Gas flow rate in terms of litre per day) x (concentration of methane in gas (in % gas)) < 200 L per day Scenario 2 If the rate of methane emission frequently exceeds the trigger value or shows a rising trend such that future emission rates are likely to exceed the trigger value, then any buildings to be constructed on that part of the site will require some form of gas protection measures, that is, · (Gas flow rate in terms of litre per day) x (concentration of methane in gas (in % gas)) > 200 L per day. The type of gas protection measures would be dependent on the design and use of the particular building. A possible measure is the incorporation of a low gas permeability membrane in the floor slab of the building or mechanical ventilation of ‘at risk’ rooms. Further investigation may be required to determine the area of land that is affected by gas emissions. The analysis and assessment of the results and design of any gas protection measures should be undertaken by suitably qualified and experienced professionals who are familiar with the properties of biogas and building protection design measures. Scenario 3 If there are occasional exceedences of the trigger value for methane emission rate from a borehole or if there is significant fluctuation of the monitoring results with some readings coming close to the trigger value, then any trends in the results will need to be assessed to determine their significance and the need for any building protection measures. It may be necessary to undertake further monitoring by extending the monitoring period, for example, if a spuriously high reading is noted towards the end of the monitoring period or if it seems likely that future emission rates may exceed the trigger value. The analysis and assessment of the monitoring results and design of any gas protection measures should be undertaken by suitably qualified and experienced professionals who are familiar with the properties of biogas and building protection design measures. Scenario 4 If the rate of methane emission from any borehole frequently exceeds the upper UK guidance value of 432 L m^-2 per day (that is, Carpenter’s guidance level at which it is recommended that development should not take place), or shows a rising trend such that future emission rates are likely to exceed this value, then no buildings should be constructed on that part of the site. That is when: · Upper UK guidance value of 432 L m^-2 per day x 20 m² = 8,640 L per day emitted from the borehole; or · (Gas flow rate in terms of litre per day) x (concentration of methane in gas (in % gas)) > 8,640 L per day. Depending on the monitoring results, it may be necessary to incorporate a number of gas protection measures into the design of the proposed development. Specific details cannot be provided until the results of the monitoring are available, and the exact building design are known and confirmed. A combination of different measures may be used for protecting both the ground level and underground structures at the development against possible risks due to biogas emissions. Discussions would need to be held with the developer and architects to determine the protection measures which are the most appropriate and feasible. Typical gas protection measures that may be adopted are described below.	Within reclaimed area / Immediate post-reclamation period	Contractor and Environmental Team		ü	ü		Waste Managem-ent Paper No. 26A on Landfill Completion, UK DOE (1993)
Sec 6.5	Sec 5.5	Precautionary gas protection measures: · For buildings with no underground basement or rooms, passive sub-floor venting should be incorporated in the building design. · For identified ‘at risk’ rooms, a low gas permeability membrane may be incorporated in the design of the floor and any below ground walls. In addition, measures should be taken to avoid or seal any openings in the floor (e.g. at service entry points). · Mechanical ventilation should be provided in specific ‘at risk’ rooms. For particularly sensitive rooms, such as below ground confined spaces which contain sources of ignition, forced ventilation may be used in addition to the use of a low gas permeability membrane. · For the three proposed basement car parks, the ventilation systems should be designed to ensure that the car park air quality guidelines given in ProPECC PN 2/96 Control of Air Pollution in Car Parks are achieved. Several ventilation systems should be installed and evenly distributed within the basement carpark, and a back-up power supply should be provided for the ventilation system. · Penetration of floor slabs by utilities or below ground services should be avoided, as far as possible. Any unavoidable penetrations should be carefully sealed using puddle flanges, low permeability sealant and/or membrane.	Building structures within reclamation area / During design, construction & operation phase	Project proponent/ Contractor/ Utility companies	ü	ü	ü		ProPECC PN 2/96 Control of Air Pollution in Car Parks
Sec 6.5	Sec 5.5	Precautions during construction works: · Smoking and naked flames in the vicinity of drilling activities should be prohibited. · Temporary structures, such as site offices, should be raised slightly off the ground. A minimum clear separation distance of 500mm, as measured from highest point on the ground surface to underside of lowest floor joist, is recommended.	Reclaimed area / During construction phase	Contractor		ü			Landfill Gas Hazard Assessment Guidance Note, EPD (1997)
Sec 6.5	Sec 5.5	Precautions prior to entry of below ground services: · Prior to entry, the atmosphere within the chamber should be checked for oxygen, methane and carbon dioxide concentrations. The chamber may then only be entered if oxygen is greater than 18% by volume, methane is less than 10% of the Lower Explosive Limit (LEL), which is equivalent to 0.5% by volume (approximately), and carbon dioxide is less than 0.5% by volume. · The entry or access point of chamber, manhole or culvert which is large enough to permit access to personnel should be clearly marked with a warning notice (in English and Chinese) which states that there is the possibility of flammable and asphyxiating gases accumulated within. · The warning notice should also give the telephone number of an appropriate competent person who can advise on the safety precautions to be followed before entry and during occupation of the manhole. · Personnel should be made aware of the dangers of entering confined spaces potentially containing hazardous gases and, where appropriate, should be trained in the use of gas detection equipment. · If either carbon dioxide or methane are higher, or oxygen lower, than the values given above, then entry to the chamber should be prohibited and expert advice sought. · Even if conditions are safe for entry, no worker should be permitted to enter the chamber without having another worker present at the surface. The worker who enters the chamber should wear an appropriate safety/recovery harness and, preferably, should carry a portable methane, carbon dioxide and oxygen meter.	Reclaimed area / During construction and operation phases	Utility companies		ü	ü		Landfill Gas Hazard Assessment Guidance Note, EPD (1997)

* Des - Design, C - Construction, O - Operation and Dec - Decommissioning

Table 11.5 Implementation Schedule for Land Contamination Mitigation Measures

EIA Ref^#	EM&A Log Ref	Environmental Protection Measures/Mitigation Measures	Location/ Timing	Implementation Agent	Implementation Stages*				Relevant Legislation and Guidelines
EIA Ref^#	EM&A Log Ref	Environmental Protection Measures/Mitigation Measures	Location/ Timing	Implementation Agent	Des	C	O	Dec	Relevant Legislation and Guidelines
· Sec 7 · Para 8, Appendix 7C · Para. 3.5 of Appendix 7A		· Further land contamination assessments to be carried out for inaccessible lots, 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 marine lots as described under para. 3.5 of Appendix 7A 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.	Environmental consultant, Site investigation contractor, Laboratory, to be appointed by the project proponent.		Ö			· Guidance Notes for Investigation and Remediation of Contaminated Sites of Petrol Filling Stations, Boatyards, and Car Repair/Dismantling Workshops, EPD. · Practice Note for Professional Persons for Contaminated Land Assessment and Remediation, ProPECC PN 3/94
· Para 6.7 of Appendix 7C		· 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.	Environmental consultant, land remediation contractor, to be appointed by the project proponent		Ö
· Paragraph 6.6 of Appendix 7C		· 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.	Environmental consultant, land remediation contractor, to be appointed by the project proponent		Ö
· Sec 7 · Para 6.1, 6.2, 6.3, 6.6, 6.7, 6.8, Table 6-2, 6-3, Table 6-4 & Table 6-5 and Para. 8.2.6 of Appendix 7C		· A 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.	Environmental consultant, land remediation contractor, to be appointed by the project proponent.		Ö
· Addendum to Land Contamination Assessment		· Inspections of all the Yau Tong Bay marine lots 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 submitted to EPD for approval. 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.	Environmental consultant, land remediation contractor, to be appointed by the project proponent.		Ö