Active sampling involves the collection of soil gas through a sampling probe or directly from a boreholes into a sorbent tube using a pump.

The compounds of interest accumulate on the sorbent material in the tube and are returned to the laboratory for analysis, giving a result as a “mass per tube”. (i.e., micrograms per tube)

The volume of air passed through the sorbent or collection device is also accurately determined. (i.e. cubic metres)

The “mass per tube” is then divided by the volume of air to give the airborne concentration. (i.e. micrograms per cubic metre).

There are numerous methods available which cover most of the common compounds of interest such as VOCs, SVOCs, PAHs and Phenols.

Leeder Consulting can prepare and supply most types of sampling media and can analyse for most compounds.

We suggest you contact us to discuss your requirements and we will provide you with a range of analytical options.

Sampling without a pump can be performed for a range of compounds using passive sampling techniques.

For more information on passive sampling click here.