Remediation and cleaning of contaminated sites is necessary when old industrial areas are converted to residential or commercial use. Aromatic and Chlorinated volatile organic compounds (VOCs) and other toxic substances may have leaked into the ground, necessitating measurements in order to determine the identity of pollutant, extent of spill and the pollutant concentration in the ground.
The Gasmet DX4040 portable multi-gas analyzer can achieve this by sampling the headspace of boreholes drilled into the ground. As FTIR (Fourier Transform Infrared) gas analysis is non-destructive, the sample can be extracted from the borehole, circulated through the analyzer, and returned to the hole so that equilibrium is formed between the ground and the air in the borehole.
Simultaneous analysis of up to 25 gases with sub-ppm detection limits and high accuracy make the DX4040 an ideal tool for this purpose. Additionally, when a gas that is not included in the 25 component list is present, its infrared spectrum can be compared against a larger library with a laptop computer and the unknown gas can be identified.