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

2. Background Saraburi is one of several provinces having very high ambient particulate concentrations due to quarry operations, aggregate plants & Cement PlantsSaraburi 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 outNah 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

3. Map of Nah Pralan area Nah Pralan Local Authority Nah Pralan Municipal Thailand

4. Sources of Dust Problem at Nah Pralan area

5. Sources of PM10 in Nah Pralan area

6. Daily average of PM10 concentration in Nah Pralan area during 2000-2004

7. Air Quality Index of PM10 in Nah Pralan area during 2003-2005 >300 = Very dangerous 201-300 = Most impact to human health 101-200 = Impact to human health 51-100 = Moderate 0-50 = Good

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

9. Remediation & SupportRemediation & Support Law Compliance & EnforcementLaw Compliance & Enforcement Monitoring & InspectionMonitoring & Inspection Public Participation & AwarenessPublic Participation & Awareness Research & StudyResearch & Study Audit & EvaluationAudit & Evaluation Mitigation & Measures

10. Remediation & Support To remedy unefficient dust control units in stone crushing plants ie; dry and wet processes.To remedy unefficient dust control units in stone crushing plants ie; dry and wet processes. Road surface must be repavedRoad surface must be repaved Do regularly cleaning by sweeper truckDo regularly cleaning by sweeper truck Planting the tree along the roadPlanting the tree along the road To rehabitate used rock minesTo rehabitate used rock mines

11. Law Compliance & Enforcement To increase the efficiency of law enforcement To increase the efficiency of law enforcement The inspection program was strictly performed for major dust pollution sources 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

12. 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

13. Public Participation & Awareness Monitoring network was set up by local public Monitoring network was set up by local public Campaign and training program “how to control air pollution” are provided to the local industrial 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 “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 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 Public awareness for controlling and preventing dust pollution was built up voluntarily Re-pavement of public road & reforestations Re-pavement of public road & reforestations

14. Research & Study The Source Apportionment of Airborne Particulate Matter was conducted The Source Apportionment of Airborne Particulate Matter was conducted Health effect was also studied (general publics and workers in quarry and aggregate plants) 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 PollutionThe Carrying Capacity of Dust Pollution - The study is going on now

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