Contaminated Land

Almost all forms of land occupation and use by human occupation leads to some form of change on the composition of the soil. Be this by deliberate tipping of waste as part of an industrial or agricultural activity or accidentally through spillage of other chemicals.

This leads to land termed as Contaminated Land and modern environmental regulation requires that land such as this is tested and cleaned before it is reused for human occupation or returned to open countryside. To do this it is necessary to test for all forms of contamination of the soil including solids liquids and gases.

Gas Data Ltd has a range of instruments that are frequently found in this application. The GFM430 is a multichannel instrument that can measure both the gas concentrations in the ground and the rate at which they are

being discharged from the sampling borehole. The base gases to be measured are methane (CH₄), carbon dioxide (CO₂), Oxygen (O₂), carbon monoxide (CO) and Hydrogen sulphide (H₂S). Sensors for other minor constituents such as ammonia (NH3) and Hydrogen (H₂) can also be added to this instrument.

Its integrated flow and pressure measurement channels mean that all of the data relating to gas contamination can be measured in one instrument. On the occasions where the gas analysis is carried out by another instrument such as the Gas Data GFM410 then the gas flow rates and pressures are ideally measured using the GFM610 which is a dedicated gas flow and pressure instrument.