Emissions sampling services

Yellow Tree’s core business is the accurate sampling of combustion and process stacks. While most of our emissions sampling work is performed for annual compliance purposes, we have also performed many scientific studies that go beyond mere compliance. For example, we have assessed the efficiency of various forms of pollution abatement equipment, compared the emissions from different biofuels, and assessed the influence of plant operation on emissions.

Combustion stacks typically need to be sampled for only Particulate Matter, Sulphur Dioxide (SO2), and Oxides of Nitrogen (NOx) but process stacks require a wide variety of pollutants to be sampled. Yellow Tree can sample for all of the pollutants that are required by the South African legislation – including Dioxins/Furans (PCDDs and PCDFs) and Polycyclic Aromatic Hydrocarbons (PAHs). Few stack sampling companies can sample such a diverse range of pollutants. We have developed a relationship with a world-class European laboratory to make this possible.

stack sampling

Stack Emissions Sampling

Stack emissions testing is a legal requirement for many industries in South Africa according to the Listed Activities and Controlled Emitters legislation. Click to learn more.

fenceline monitoring

Fenceline Monitoring

The National Ambient Air Quality Standards (NAAQS) identify certain pollutants, such as benzene, toluene, ethylbenzene, and xylene (BTEX) that pose a threat to human health. These are monitored at the fenceline.

certified calibration gas

Leak Detection and Repair (LDAR) Programme and Monitoring

Section 21 of the National Environmental Management: Air Quality Act (NEMAQA) requires the petro-chemical industry, amongst others, to develop LDAR programmes and then to conduct subsequent LDAR monitoring.

air monitoring cape town

Consolidated Emissions Results

With our multiple testing teams and short lead times, we can conduct testing at all of your sites nationwide and provide consolidated feedback to head office. Our reports are comprehensive and simple to understand, even for non-technical people.

air emissions license joburg

Engineering Advice

Our service doesn’t end when we hand over the report. We will meet with you to discuss ways to reduce emissions and to obtain compliance. We can also conduct upstream and downstream measurement to determine the abatement efficiency.
air quality license

The Bridge Between You and Law

We know the legislation well. We will sit with you and share how the legislation applies to your site. We can assist you with your Atmospheric Emissions License (AEL), NAIES and Annual Reporting. And we can help you build a relationship of trust with your Air Quality Officer as we have worked with many of the AQO’s in SA.

AEL certificate

Peace of Mind

Our team consists of Chemical Engineers and Scientists. We have extensive combustion, air pollution, and process engineering experience. We will provide accurate emissions results that you can trust. Considering the risk of fines, imprisonment, and reputational damage; we provide you with Peace of Mind.

Years in the Business

Our track record and reputation of serving clients excellently is important to us.

Stack Tests Completed

Our experience translates into efficiency and accuracy.

Chemical Engineers & Scientists

Our recruitment process is rigorous. We hire the best to give you the best.