Ms' Kanjana Suaysom

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MITIGATION OF DUST POLLUTION FROM AGGREGATE
PLANTS AND QUARRY OPERATIONS
By Ms. Kanjana Suaysom Environmental
Officer Pollution Control Department THAILAND
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Background

• Saraburi is one of several provinces having very
  high ambient particulate concentrations due to
  quarry operations, aggregate plants Cement
  Plants
• Nah Pralan sub-district is a small area located
  in Chalerm Phra-Kiat District, Saraburi, where
  major industrial activities are carried out
• 30 quarry operations
• 55 aggregate plants
• limestone cement plants
• others transportation activities

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Map of Nah Pralan area
Thailand
Nah Pralan Local Authority
Nah Pralan Municipal
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Sources of Dust Problem at Nah Pralan area
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Sources of PM10 in Nah Pralan area
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Daily average of PM10 concentration in Nah
Pralan area during 2000-2004
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Air Quality Index of PM10 in Nah Pralan
area during 2003-2005
gt300 Very dangerous 201-300 Most
impact to human health 101-200 Impact to human
health 51-100 Moderate 0-50 Good
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Control Strategies and Measures

• The National Environment Board has designated Nah
  Pralan District to be Pollution Control Area
  since April 19, 2004
• Monthly progress report of particulate problem in
  Nah Pralan area is required by the Cabinet since
  April 20, 2004

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Mitigation Measures

• Remediation Support
• Law Compliance Enforcement
• Monitoring Inspection
• Public Participation Awareness
• Research Study
• Audit Evaluation

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Remediation Support

• To remedy unefficient dust control units in stone
  crushing plants ie dry and wet processes.
• Road surface must be repaved
• Do regularly cleaning by sweeper truck
• Planting the tree along the road
• To rehabitate used rock mines

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Law Compliance Enforcement

• To increase the efficiency of law enforcement
• The inspection program was strictly performed for
  major dust pollution sources
• Fugitive dust from crushing processes was
  measured
• All crushing plants are to install water supply
  and electricity metering devices at dust control
  units
• Noise and vibration at rock mining and crushing
  plants are to be monitored
• For mobile sources inspection, about 7,000
  vehicles were checked for black smoke by smoke
  opacity meter

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Monitoring Inspection

• The concentration of PM10 and TSP in the ambient
  were measured by real-time monitoring unit and
  manual air sampler units

• Dust emission from point sources also be
  monitored
• Cement plant
• Grinding mills plants
• Others

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Public Participation Awareness

• Monitoring network was set up by local public
• Campaign and training program how to control air
  pollution are provided to the local industrial
• Big Cleaning Day was organized to encourage
  public participation in cleaning up the main
  roads
• A short message was also sent out to alert public
  and persons in charge, when the concentration of
  PM10 continually exceed the NAQS
• Public awareness for controlling and preventing
  dust pollution was built up voluntarily
• Re-pavement of public road reforestations

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Research Study

• The Source Apportionment of Airborne Particulate
  Matter was conducted

• Health effect was also studied (general publics
  and workers in quarry and aggregate plants)
• 22 general publics and 6 workers had dis-function
  by physical examination,
• 31 general publics and 83 workers had dis-lung
  function by lung function efficiency test
• 59 general publics and 153 workers had dis-lung
  function by chest X-ray test.

• The Carrying Capacity of Dust Pollution
• - The study is going on now

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Audit and Evaluation

• The progress of mitigation measures were followed
  up through the committee meeting
• Do report to the NEB and the cabinet every month

Ambient PM10 Concentration in Nah Pralan area
(Monthly) during2003-2005
Percentage of day which PM10 level within the
daily standard