Odour Survey & AssessmentOdour Survey & Assessment

Nuisance Odour remained as one of common complaint which local regulators received. The majority of air pollution complaints are related to nuisance odour. The issues normally will become complex when the sources and types of odour unable to be found and recognized.  Furthermore, odour may be subjective as the human perception of odour may be varied from person to person.  Odour can be measured as odour strength and quantified as Odour Unit (OU) using standard method as published by the American Society of Testing and Materials (ASTM E679 and E544) and by the European Union (EN13725). In 2000 the proposed European Normalization Standard, EN 13725 implemented and become the “International Standard” for odour testing. The odour unit will scale how strong the smell in the air samples collected by dilution/threshold (D/T) principles with using of olfactometer.  Odour results reported in the Odour Unit or Standard Odour Unit might be less useful if lack of local odour regulation to compare the results obtained. A more detail chemical analysis often necessary to determine the odourous compounds that contributing smell in the air. Odour detected by the human nose typically will be nuisance and in most of the cases do not cause long term health effect to the individual as the concentration level of odourous compounds could be possibly lower than TLV as stipulated by ACGIH.  Generally, if the sources of odour able to be identified and eliminated, any related sickness (eg nausea) will be disappeared.  Odour Analysis: We have several state of art technology able to help you to identify the chemical compounds responsible to the odour and trace the possible sources of odour. Contact us now!

Environmental Regulations:

DescriptionSingapore RegulationsMalaysia Regulations
Ambient Air MonitoringNational Ambient Air Quality Standards (NAAQS) adopted from USEPARecommended Malaysian Air Quality Guideline (RMG)
Stack Emission Monitoring / Isokinetic SamplingEnvironmental Protection & Management (Air Impurities) Regulations 2001Environmental Quality (Clean Air) Amendment Regulation 2000
Boundary Noise MonitoringEnvironmental Protection and Management (Boundary Noise Limits For Factory Premises)The Planning Guidelines for Environmental Noise Limits and Control (Schedule 1)
Wastewater MonitoringEnvironmental Protection and Management
(Trade Effluent) Regulations 2001
Standard A/B (Environmental Quality (Industrial Effluent) Regulations, 2009

Occupational Hygiene

What is Occupational Hygiene? The International Occupational Hygiene Association (IOHA) refers to occupational hygiene  (in US ‘Industrial’ Hygiene) as the discipline of anticipating, recognizing, evaluating and controlling health hazards in the working environment with the objective of protecting worker health and well-being and safeguarding the community at large. The workplace hazards may result in injury, illness, impairment, or affect the well being of workers and members of the community. We have competent person that able to assist you in measure the chemical & noise exposure as well as assess the Risks Evaluate Health Effects due to Hazardous Substances & Noise.  Our Hygiene Monitoring Services as listed below:

Chemical Exposure Monitoring/Toxic Air Monitoring


  • National Institute for Occupational Safety and Health (NIOSH ) Manual of Analytical Methods – NMAM
  • Occupational Safety & Health Administration (OSHA), Chemical Sampling Information (CSI)
  • American Conference of Industrial Hygienists (ACGIH) – TLVS and BELs (Threshold Limits Values for Chemical Substances and Physical Agents & Biological Exposure Indices, 2013


  • Singapore: Workplace Safety & Health Act (General Provisions) Regulations 2006: (Permissible Exposure Limits of Toxic Substances)
  • Malaysia: Occupational Safety and Health (Use and Standard of Exposure Of Chemicals Hazardous to Health) Regulations 2000 – Schedule I (regulation 6 & 7) List of Permissible Exposure Limits

Noise Exposure Monitoring

Our Services: Noise Mapping /Personal Noise Exposure by Dosimeter

Reference: BA 7445, ANSI S12.19-1996 and Other Internationally Recognized Methods


  • Singapore: Workplace Safety and Health (Noise) Regulations
  • Malaysia: Factory and Machinery (Noise Exposure) Regulations

Indoor Air Quality Study (IAQ)

Our Services: Green Mark Building IAQ Audit and IAQ Study for Air Condition building


  • SS 553: Code of practice for air-conditioning and mechanical ventilation in buildings 2009
  • SS554 Code of Practice for Indoor Air Quality for air condition building, 2009
  • Code of Practice in Indoor Air Quality published by DOSH, Malaysia, 2005
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