Stack Emission Monitoring and testing is often referred to as air monitoring of an emission point. Normally, such monitoring is carried out on boiler stacks, exhausts from large production plants, discharges from bag filters, thermal oxidisers and is performed on a regular basis to ensure that the emissions are kept in check.
Stacks from boilers and industrial processes will carry a large variety of pollutants such as SOx, NOx, dust and debris particles, solvents and other dusts and gases. These can have a detrimental effect on the surrounding areas air quality and health; it is for this reason that such emissions are often well regulated. Typically this regulation requires measurement of the concentration of these pollutants on a regular basis, often referred to as periodic stack emission monitoring.
Stack testing is required either on an annual basis or sometimes need to be monitored continuously over a 24-hour period depending on the scale of emissions being emitted