Stack or source emissions monitoring involves taking direct measurements of an emission source, usually at an industrial or manufacturing facility. Most of the operations in the listed activities require stack emission sampling for particulates and other pollutants. Hence, the purpose of testing is often to demonstrate compliance of emissions with the legislative (e.g. AEL) requirements and environmental performance commitments of a company.

Other applications where DDA has performed stack monitoring, include testing to allow for optimization of the emissions of existing processes. DDA has performed emissions testing for the efficiency optimisation of combustion sources, such as boilers and burners and odour reduction equipment, such as scrubbers.

The sampling methods DDA utilises are in accordance with the EPA methods, which comply with the National Environmental Management: Air Quality Act of 2004 (Act 39 of 2004).

DDA operates latest technology instruments for stack sampling of a wide range of pollutants and is one of the longest established monitoring houses for stack testing in Cape Town. With DDA’s chemical and mechanical engineers we provide the highest quality stack monitoring services.

The sampling methods include isokinetic methods for particulates, dry and wet chemical methods for various gases, as well as real-time sampling instruments. An abridged list of the gases we sample include:

  • Ammonia NH3
  • Carbon Monoxide CO
  • Carbon Dioxide CO2
  • Dioxins & Furans
  • Hydrogen Halides & Halogens HF, HCl, HBr, HI, F2, Cl2, Br2, I2
  • Hydrogen Sulphide H2S
  • Heavy Metals
  • Nitrogen Oxides NOx
  • Particulate Matter PM10, TSP
  • Sulphur Oxides SOx
  • Volatile Organic Compounds VOCs