Environmental Assurance (Pty) Ltd.

Ambient Air Quality Monitoring Services

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Ambient Air Quality can be defined as: The physical and chemical measure of pollutant concentrations in the ambient atmosphere. Generally the concentrations of gases or particles to which the general population would be exposed to, as opposed to the concentration of pollutants emitted by a specific source. The quality is usually determined over a specific time period.

The investigation, assessment and management of potential negative impacts on air quality forms an important component of environmental management of various developments, particularly those associated with the industrial, energy production and mining sectors. On-going management of the impacts (including cumulative impacts) of emissions on air quality can also require implementation of monitoring programs.

Environmental Assurance, as experts in the field of Ambient Air Quality monitoring, can provided clients with monitoring programs tailored made for specific needs. Air Quality Monitoring can be done for both ambient and source monitoring, with the objective of harnessing accredited sampling techniques to assess compliance to available local and international legislation, specifically Guidelines and Standards governing air quality.

Monitoring traditionally focused on the assessment of mining and associated smelter operations. Dust fallout is assessed as a management tool to evaluate the efficacy of management measures being deployed at an impacting source. South Africa is one of the few countries who have ambient guidelines available for the assessment of dust fallout, also termed nuisance dust. Environmental Assurance can facilitates the installation of equipment required for the assessment of dust fallout, as well as the collection and laboratory analysis of samples taken on a monthly basis. The sample results are then interpreted and detailed reports are provided to the Client.

Ambient Air Quality monitoring includes (not limited to);

Passive Sampling:

  • Gravimetrical Dust Fallout - (milligram/square meter/day) or (mg/m2/day)

Indicative Active Sampling:

  • Dust-PM10 (milligram/cubic meter) or (mg/m3)
  • CO2-(ppm)
  • CO-(ppm)
  • VOC-(ppm)

Passive Diffuse Sampling:

  • Hydrogen Fluoride- HF in Microgram/Cubic Meter (ug/m3)
  • Nitrogen Dioxide- NO2 in Microgram/Cubic Meter (ug/m3)
  • Sulphur Dioxide- SO2 in Microgram/Cubic Meter (ug/m3)
  • Hydrogen Sulphide- H2S in Microgram/Cubic Meter (ug/m3)

Other Parameters:

  • BTEX (Benzene, toluene, ethylbenze, and xylenes)
  • Phenol (Hydroxyl group (-OH) bonded directly to an aromatic hydrocarbon group)

Humidity and temperature:

Environmental Assurance provides more than just compliance with legislation; we assist clients in site layout and monitoring to provide them the environment they want tomorrow.

AIR QAULITY IMPACT ASSESSMENT

The air quality impact assessment component of an investigation involves calculating emissions emanating from sources within a process and predicting ambient air quality impacts resulting from the release of these emissions.

The ambient air quality impacts are determined with the aid of monitoring of specific parameters. The physical impact is assessed by comparing the predicted concentration or deposition levels with available health screening limits.

AIR QUALITY MANAGEMENT PLAN

Air quality management planning can be undertaken on a local or regional scale. Management measures can therefore be developed to reduce air quality impacts from single or multiple sources. Our experienced consultants identify management measures that could be implemented practically, based on the resources available to the Client, with the main focus on implementing the best available technology for a specific polluting source.

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