Air Pollution Control

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Air Pollution Control Air Pollution Control
Ordinance ( Chapter 311 )
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Air Pollution Control Regulations Relevant
to the Construction Industry

• (Construction Dust) Regulation
• (Specified Processes) Regulation
• (Smoke) Regulation
• (Fuel Restriction) Regulation
• (Open Burning) Regulation

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Air Pollution Control Regulations Relevant
to the Construction Industry
(Specified Processes) Regulation
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Air Pollution Control Regulations Relevant
to the Construction Industry
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Air Pollution Control (Open Burning) Regulation

• Purpose
• Prohibit / Control Open Burning Activities
• Effective date
• 26 Feb 1996

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Prohibited Open Burning
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Application for Open Burning Permit

• 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.

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Penalties
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Purpose
Air Pollution Control (Construction Dust)
Regulation

• 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.

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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

• Site formation
• Reclamation
• Work carried out in any part of a tunnel that is
  within 100 m of any exit to the open air

• Road construction work
• Demolition of a building
• Construction of building foundation
• Construction of building superstructure

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Notification Form
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Dust Control Requirement
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Part III of Schedule

• General Control Requirements

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General Requirements

• 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.

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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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Cement
Bagged cement exceeding 20 nos should be covered
or enclosed in area sheltered on the top and the
3 sides.
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Cement
Bulk Cement or PFA stored in closed silo with
high level alarm.
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Exposed Earth
Treat by compaction, hydroseeding, vegetation
planting, etc. within 6 months after the last
construction activity.
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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 Schedule

• Control 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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Transfer of Dusty Materials with a Belt Conveyor
System

• 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 lt1 m.
• Enclose the unloading area.

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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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Drilling, Cutting Polishing, etc

• Spray surface continuously with water.
• Equip with effective dust extraction and
  filtering device.

Wet the breaking area to control emission

Dust collection system to control dust emission
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.

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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

• Carry out de-bagging, batching and mixing of
  cement and PFA in area sheltered on the top and
  the 3 sides.

Concrete production in open area is NOT allowed
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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.

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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
  (gt1.2 m high lt50 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.

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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.

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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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Exemption for Emergency Work

• Where there is a threat to human life or building
  safety.
• Immediate repair of utility services, road
  collapse or road blockage due to accidents.

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Penalties
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Tips to Reduce Dust Emission

• 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.

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Environmental Protection Department