Gas Sampling Technology
Soil Gas Sampling
Description
Soil gas sampling measures the gas contained in the interstitial spaces of the soil, as opposed to directly sampling the soil matrix, above the water table.
The tubing used as part of either of the described sampling systems should be Teflon or stainless steel.
As most soil gas sampling will be conducted to investigate the presence or extent of organic compounds, Teflon tubing is required to ensure the integrity of the sample.
Soil-gas samples should be sufficiently deep to minimize the effects of changes in barometric pressure (either ambient or within an overlying building due to the operation of heating, ventilation, and air conditioning systems), temperature, or breakthrough of ambient air from the surface.
