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Air Pollution Control
« Air Pollution Control Ordinance » ( Chapter 311 )
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(Construction Dust) Regulation
(Specified Processes) Regulation
(Smoke) Regulation
(Fuel Restriction) Regulation
(Open Burning) Regulation
« Air Pollution Control Regulations » Relevant to the Construction Industry
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« Air Pollution Control Regulations » Relevant to the Construction Industry
Bitumen plant Concrete batching plant
(Specified Processes) Regulation
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(Smoke) Regulation(Fuel Restriction)
Regulation
« Air Pollution Control Regulations » Relevant to the Construction Industry
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Air Pollution Control (Open Burning) Regulation
• Purpose
Prohibit / Control Open BurningActivities
• Effective date
26 Feb 1996
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Disposal of construction Waste
Site clearance
Disposal of Tyres Salvage of metal
Prohibited Open Burning
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1. Allow at least 28 days for application
2. The applicant shall prove︰
a. an absolute need for the burning;
b. there is no other practical alternative means of waste disposal; and
c. there will not be adverse environmental impact.
3. The Authority may impose terms and conditions in the permit.
Application for Open Burning Permit
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Penalties
Offence Penalties
1. Carry out prohibitedopen burning
2. Carry out openburning without apermit or incontravention ofpermit conditions
1st Conviction:Level 5 ($50,000)
2nd or subsequentconviction:
Level 5 ($50,000) and
3-month imprisonment
Continuous fine:
$500 every 15 minutes
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Purpose
• Employ effective dust abatement measures to
• Reduce dust emission,• Reduce air nuisance, and• Improve general air quality.
• Set out appropriate dust control measures and make them as standard practice in the construction industry.
« Air Pollution Control(Construction Dust) Regulation »
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Classification of Construction Works
• Three main types of construction works:
– Notifiable work: building demolition, construction of superstructure, site formation, reclamation, etc.
– Regulatory work (Notification not required) : road opening /resurfacing, external renovation, slope stabilization.
– Excluded work (Notification not required) : internal renovation, specified process, etc.
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Notifiable Work
• Road construction work
• Demolition of a building
• Construction of building foundation
• Construction of building superstructure
• Site formation
• Reclamation
• Work carried out in any part of a tunnel that is within 100 m of any exit to the open air
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Form NA
Air Pollution Control Ordinance (Chapter 311) Notification pursuant to Section 3(1) of the
Air Pollution Control (Construction Dust) Regulation
Notification Form
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Dust Control Requirement
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Part III of ScheduleGeneral Control Requirements
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• Stop operating the relevant plant or dusty process if there is breakdown of air pollution control equipment.
• Avoid using compressed air jet to clean off dust.
General Requirements
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Vehicle washing
Automatic washing machineHoarding
Site Boundary and Exit• Provide vehicle washing
facilities.
• Pave the area between site exit & the vehicle washing facilities.
• Provide 2.4 m hoarding along site boundary.
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Main Haul Road(4 or more vehicles passing in
any 30 minutes)• Pave with concrete,
bituminous materials, hard cores, etc. and keep clear of dusty materials; or
• Maintain entire road surface wet.
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Road Leading Only to A Construction Site
• Clear dusty materials from the portion of any such road within 30 m of vehicle entrance / exit.
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Do not store in open area
Store in sheltered areaProvide cover
Bagged cement exceeding 20 nos should be covered or enclosed in area sheltered on the top and the 3 sides.
Cement
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Bulk Cement or PFA stored in closed silo with high level alarm.
Cement
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Exposed earth compacted
Exposed earth treated with hydroseeding
Treat by compaction, hydroseeding, vegetation planting, etc. within 6 months after the last construction activity.
Exposed Earth
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Dusty Materials Collected by Fabric Filters or Other Equipment
• Dispose of in enclosed containers.• Do not store in open area.
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Part IV of ScheduleControl Requirements for Individual Activities
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Stockpiling of Dusty Materials
• Cover entirely by impervious sheeting;
• Place in an area sheltered on the top and the 3 sides; or
• Maintain entire surface wet.
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Loading, Unloading or Transfer of Dusty Materials
Wet dusty materials with water spraying prior to operation.
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• Enclose the belt conveyor from the top and the 2 sides.
• Enclose the transfer point between conveyors.
• Install belt scraper and bottom plates.
• Maintain vertical distance between belt conveyor outlet and material landing point at <1 m.
• Enclose the unloading area.
Transfer of Dusty Materials with a Belt Conveyor System
Transfer point enclosed
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Use of Vehicles• Wash every vehicle before
leaving the site to remove dusty materials from body and wheels.
• Cover any load of dusty materials.
Wash vehicle before leaving site
Load on truck
covered
Load on truck inadequately
covered
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Dust collection system to control dust emission
Wet the breaking area to control emission
Drilling, Cutting & Polishing, etc• Spray surface continuou
sly with water.
• Equip with effective dust extraction and filtering device.
Drilling without watering
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Debris Handling
• Cover or store debris in area sheltered on the top and the 3 sides.
• Enclose the debris chute.
• Wet debris before dumping into chute.
Enclosed debris chute and collection area
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Excavation or Earth Moving• Spray the working area with water or chemicals
before, during and immediately after the operation to maintain entire surface wet.
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Concrete production in open area is NOT allowed
Concrete Production• Carry out de-bagging, batching and mixing of
cement and PFA in area sheltered on the top and the 3 sides.
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Site Clearance• Wet the working area
before, during and immediately after the operation.
• Cover all demolished items or place in area sheltered on the top and the 3 sides within a day of demolition.
Dusty material should be covered or removed
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Blasting
• Wet area within 30 m before blasting.
• No blasting during the strong wind signal or tropical cyclone warning No.3 or above is hoisted unless permitted by Commissioner of Mines.
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Part I of Schedule
Control Requirements for Notifiable Works
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Reclamation
Treat or seal any stockpile of dusty materials (>1.2 m high & <50 m from site boundary) with bitumen or other suitable surface stabilizer.
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Demolition of a Building• Wet the working area prior
to, during and immediately after demolition.
• Enclose the building with impervious dust screens to a height of at least 1 m higher.
• Wet remaining dusty materials after removal and clear the road surface.
Wet the working area
Enclose the building under demolition
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Construction of the Superstructure of Building
• Provide effective dust screen where a scaffolding is erected.
• Enclose the skip hoist.
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Part II of Schedule
Control Requirements for Regulatory Works
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Renovation on Outer Surface of External Wall or Roof
• Provide dust screen where there is scaffolding.
• Enclose the skip hoist.
• Wet remaining dusty materials after removal and clear the road surface.
Screen effectively reduce dust nuisance
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Road Opening Resurfacing Work• Cover dusty material.
• Spray, remove / backfill / reinstate dusty materials within 24 hours.
• Dusty materials shall notbe extended beyondpedestrian barriers, fencing or traffic cones.
• Any remaining dusty materials after removal shall be wetted and cleared from road surface.
Remaining dusty materials should be wetted and cleared
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Exemption• Road construction work
• exempt from hoarding requirement.
• Road opening or resurfacing work
• exempt from vehicle washing facilities and hoarding requirements.
• Slope stabilization
• exempt from vehicle washing facilities requirement, and
• exempt from hoarding requirement if the site boundary adjoins road for vehicular traffic.
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• Where there is a threat to human
life or building safety.
• Immediate repair of utility services,
road collapse or road blockage due
to accidents.
Exemption for Emergency Work
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Penalties
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• Include the plan and budget of implementation of dust control measures in the tender.
• Arrange delivery of dust suppression materials and equipment to site at an early stage.
• Ensure good communication between frontline workers and management staff.
• Promote staff awareness on dust control measures.
• Supervise frontline workers.
Tips to Reduce Dust Emission
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Environmental Protection Department
