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Contaminated Soil
Contaminated soil is a serious and wide spread problem that normally has to be solved to avoid pollution of the ground water reservoir or to prevent from occupational safety & health risks through vapor intrusion in buildings’ basements.
Many remedial technologies are available for solving the problem - which to choose depends on the pollution level, chemical substances in the pollution and the geological structure of the ground.
Measurement of Chlorinated Compounds in Soil-gas
Chlorinated solvents in the sub-surface are very common pollutants, and especially the two solvents PCE (Tetrachloroethylene) and TCE (Trichloroethylene) are often observed. A source of these pollutants is, for example, dry cleaners.
To be able to evaluate the efficiency of the remedial system, the amount of pollutant removed from the soil has to be monitored. This is done by measuring the flow and the gas concentration of the soil-gas that leaves from the passive or active extraction system.
Our Solution
The Photoacoustic Multi-gas Monitor 1412i is a suitable measurement tool as it features high sensitivity on multiple contaminating compounds, including the chlorinated solvents and its multi-gas monitoring capability will help tracking the differential remedial efficiency multiple contaminants.
Among various chlorinated VOCs, there some critical ones listed below with the detection limit that can be achieved with the INNOVA 1412i for each of them:
| Compound | Detection limit |
| Tetrachloroethylene (PCE) | 0.04ppm |
| Trichloroethylene (TCE) | 0.07 ppm |
| 1,1,1-Trichloroethane (TCA) | 0.04ppm |
| Chloroform (TCM) | 0.04ppm |
Your Benefits
- Quantitative trace measurement of multiple pollutant vapors
- In-situ measurement for direct monitoring of remediation process
- Robust and field proven design
- Simplicity of use even by non-experts
- Scalability of measurement campaigns at high replication rate without extra cost (no canisters, no carrier gas, no consumables)
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The working principle of passive soil vapor extraction. Passive soil vapor extraction relies on the naturally occurring variations in barometric pressure.
The Measurement Setup with the Photoacoustic Multi-gas Monitor 1412i
